Merge pull request #14067 from zenador/nhcb-merge-main

[nhcb branch] Merge main

.github/workflows/buf-lint.yml

@@ -12,7 +12,7 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: bufbuild/buf-setup-action@517ee23296d5caf38df31c21945e6a54bbc8a89f # v1.30.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/buf.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository_owner == 'prometheus'
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: bufbuild/buf-setup-action@517ee23296d5caf38df31c21945e6a54bbc8a89f # v1.30.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
       # should also be updated.
       image: quay.io/prometheus/golang-builder:1.22-base
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: prometheus/promci@3cb0c3871f223bd5ce1226995bd52ffb314798b6 # v0.1.0
       - uses: ./.github/promci/actions/setup_environment
       - run: make GOOPTS=--tags=stringlabels GO_ONLY=1 SKIP_GOLANGCI_LINT=1
@@ -27,7 +27,7 @@ jobs:
     container:
       image: quay.io/prometheus/golang-builder:1.22-base
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: prometheus/promci@3cb0c3871f223bd5ce1226995bd52ffb314798b6 # v0.1.0
       - uses: ./.github/promci/actions/setup_environment
       - run: go test --tags=dedupelabels ./...
@@ -43,7 +43,7 @@ jobs:
       # The go version in this image should be N-1 wrt test_go.
       image: quay.io/prometheus/golang-builder:1.21-base
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - run: make build
       # Don't run NPM build; don't run race-detector.
       - run: make test GO_ONLY=1 test-flags=""
@@ -57,7 +57,7 @@ jobs:
       image: quay.io/prometheus/golang-builder:1.22-base
 
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: prometheus/promci@3cb0c3871f223bd5ce1226995bd52ffb314798b6 # v0.1.0
       - uses: ./.github/promci/actions/setup_environment
         with:
@@ -74,7 +74,7 @@ jobs:
     name: Go tests on Windows
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
           go-version: 1.22.x
@@ -91,7 +91,7 @@ jobs:
     container:
       image: quay.io/prometheus/golang-builder:1.22-base
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - run: go install ./cmd/promtool/.
       - run: go install github.com/google/go-jsonnet/cmd/jsonnet@latest
       - run: go install github.com/google/go-jsonnet/cmd/jsonnetfmt@latest
@@ -114,7 +114,7 @@ jobs:
       matrix:
         thread: [ 0, 1, 2 ]
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: prometheus/promci@3cb0c3871f223bd5ce1226995bd52ffb314798b6 # v0.1.0
       - uses: ./.github/promci/actions/build
         with:
@@ -137,18 +137,31 @@ jobs:
     # Whenever the Go version is updated here, .promu.yml
     # should also be updated.
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: prometheus/promci@3cb0c3871f223bd5ce1226995bd52ffb314798b6 # v0.1.0
       - uses: ./.github/promci/actions/build
         with:
           parallelism: 12
           thread: ${{ matrix.thread }}
+  check_generated_parser:
+    name: Check generated parser
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
+      - name: Install Go
+        uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+        with:
+          cache: false
+          go-version: 1.22.x
+      - name: Run goyacc and check for diff
+        run: make install-goyacc check-generated-parser
   golangci:
     name: golangci-lint
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - name: Install Go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
@@ -175,7 +188,7 @@ jobs:
     needs: [test_ui, test_go, test_go_more, test_go_oldest, test_windows, golangci, codeql, build_all]
     if: github.event_name == 'push' && github.event.ref == 'refs/heads/main'
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: prometheus/promci@3cb0c3871f223bd5ce1226995bd52ffb314798b6 # v0.1.0
       - uses: ./.github/promci/actions/publish_main
         with:
@@ -189,7 +202,7 @@ jobs:
     needs: [test_ui, test_go, test_go_more, test_go_oldest, test_windows, golangci, codeql, build_all]
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v2.')
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: prometheus/promci@3cb0c3871f223bd5ce1226995bd52ffb314798b6 # v0.1.0
       - uses: ./.github/promci/actions/publish_release
         with:
@@ -204,7 +217,7 @@ jobs:
     needs: [test_ui, codeql]
     steps:
       - name: Checkout
-        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - uses: prometheus/promci@3cb0c3871f223bd5ce1226995bd52ffb314798b6 # v0.1.0
       - name: Install nodejs
         uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2

.github/workflows/codeql-analysis.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@012739e5082ff0c22ca6d6ab32e07c36df03c4a4 # v3.22.12

.github/workflows/container_description.yml

@@ -17,7 +17,7 @@ jobs:
     if: github.repository_owner == 'prometheus' || github.repository_owner == 'prometheus-community' # Don't run this workflow on forks.
     steps:
       - name: git checkout
-        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - name: Set docker hub repo name
         run: echo "DOCKER_REPO_NAME=$(make docker-repo-name)" >> $GITHUB_ENV
       - name: Push README to Dockerhub
@@ -37,7 +37,7 @@ jobs:
     if: github.repository_owner == 'prometheus' || github.repository_owner == 'prometheus-community' # Don't run this workflow on forks.
     steps:
       - name: git checkout
-        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - name: Set quay.io org name
         run: echo "DOCKER_REPO=$(echo quay.io/${GITHUB_REPOSITORY_OWNER} | tr -d '-')" >> $GITHUB_ENV
       - name: Set quay.io repo name

.github/workflows/fuzzing.yml

@@ -21,7 +21,7 @@ jobs:
           fuzz-seconds: 600
           dry-run: false
       - name: Upload Crash
-        uses: actions/upload-artifact@5d5d22a31266ced268874388b861e4b58bb5c2f3 # v4.3.1
+        uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808 # v4.3.3
         if: failure() && steps.build.outcome == 'success'
         with:
           name: artifacts

.github/workflows/repo_sync.yml

@@ -13,7 +13,7 @@ jobs:
     container:
       image: quay.io/prometheus/golang-builder
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - run: ./scripts/sync_repo_files.sh
         env:
           GITHUB_TOKEN: ${{ secrets.PROMBOT_GITHUB_TOKEN }}

.github/workflows/scorecards.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # tag=v4.1.2
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # tag=v4.1.4
         with:
           persist-credentials: false
 
@@ -37,7 +37,7 @@ jobs:
       # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
       # format to the repository Actions tab.
       - name: "Upload artifact"
-        uses: actions/upload-artifact@5d5d22a31266ced268874388b861e4b58bb5c2f3 # tag=v4.3.1
+        uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808 # tag=v4.3.3
         with:
           name: SARIF file
           path: results.sarif

CHANGELOG.md

@@ -2,7 +2,44 @@
 
 ## unreleased
 
+* [CHANGE] Rules: Execute 1 query instead of N (where N is the number of alerts within alert rule) when restoring alerts. #13980
+* [ENHANCEMENT] Rules: Add `rule_group_last_restore_duration_seconds` to measure the time it takes to restore a rule group. #13974
+* [ENHANCEMENT] OTLP: Improve remote write format translation performance by using label set hashes for metric identifiers instead of string based ones. #14006 #13991
+* [BUGFIX] OTLP: Don't generate target_info unless at least one identifying label is defined. #13991
+* [BUGFIX] OTLP: Don't generate target_info unless there are metrics. #13991
+
+## 2.52.0-rc.1 / 2024-05-03
+
+* [BUGFIX] API: Fix missing comma during JSON encoding of API results. #14047
+
+## 2.52.0-rc.0 / 2024-04-22
+
 * [CHANGE] TSDB: Fix the predicate checking for blocks which are beyond the retention period to include the ones right at the retention boundary. #9633
+* [FEATURE] Kubernetes SD: Add a new metric `prometheus_sd_kubernetes_failures_total` to track failed requests to Kubernetes API. #13554
+* [FEATURE] Kubernetes SD: Add node and zone metadata labels when using the endpointslice role. #13935
+* [FEATURE] Azure SD/Remote Write: Allow usage of Azure authorization SDK. #13099
+* [FEATURE] Alerting: Support native histogram templating. #13731
+* [FEATURE] Linode SD: Support IPv6 range discovery and region filtering. #13774
+* [ENHANCEMENT] PromQL: Performance improvements for queries with regex matchers. #13461
+* [ENHANCEMENT] PromQL: Performance improvements when using aggregation operators. #13744
+* [ENHANCEMENT] PromQL: Validate label_join destination label. #13803
+* [ENHANCEMENT] Scrape: Increment `prometheus_target_scrapes_sample_duplicate_timestamp_total` metric on duplicated series during one scrape. #12933
+* [ENHANCEMENT] TSDB: Many improvements in performance. #13742 #13673 #13782
+* [ENHANCEMENT] TSDB: Pause regular block compactions if the head needs to be compacted (prioritize head as it increases memory consumption). #13754
+* [ENHANCEMENT] Observability: Improved logging during signal handling termination. #13772
+* [ENHANCEMENT] Observability: All log lines for drop series use "num_dropped" key consistently. #13823
+* [ENHANCEMENT] Observability: Log chunk snapshot and mmaped chunk replay duration during WAL replay. #13838
+* [ENHANCEMENT] Observability: Log if the block is being created from WBL during compaction. #13846
+* [BUGFIX] PromQL: Fix inaccurate sample number statistic when querying histograms. #13667
+* [BUGFIX] PromQL: Fix `histogram_stddev` and `histogram_stdvar` for cases where the histogram has negative buckets. #13852
+* [BUGFIX] PromQL: Fix possible duplicated label name and values in a metric result for specific queries. #13845
+* [BUGFIX] Scrape: Fix setting native histogram schema factor during scrape. #13846
+* [BUGFIX] TSDB: Fix counting of histogram samples when creating WAL checkpoint stats. #13776
+* [BUGFIX] TSDB: Fix cases of compacting empty heads. #13755
+* [BUGFIX] TSDB: Count float histograms in WAL checkpoint. #13844
+* [BUGFIX] Remote Read: Fix memory leak due to broken requests. #13777
+* [BUGFIX] API: Stop building response for `/api/v1/series/` when the API request was cancelled. #13766
+* [BUGFIX] promtool: Fix panic on `promtool tsdb analyze --extended` when no native histograms are present. #13976
 
 ## 2.51.2 / 2024-04-09
 

Makefile

@@ -24,6 +24,7 @@ TSDB_BENCHMARK_DATASET ?= ./tsdb/testdata/20kseries.json
 TSDB_BENCHMARK_OUTPUT_DIR ?= ./benchout
 
 GOLANGCI_LINT_OPTS ?= --timeout 4m
+GOYACC_VERSION ?= v0.6.0
 
 include Makefile.common
 
@@ -78,24 +79,42 @@ assets-tarball: assets
 	@echo '>> packaging assets'
 	scripts/package_assets.sh
 
-# We only want to generate the parser when there's changes to the grammar.
 .PHONY: parser
 parser:
 	@echo ">> running goyacc to generate the .go file."
 ifeq (, $(shell command -v goyacc 2> /dev/null))
 	@echo "goyacc not installed so skipping"
-	@echo "To install: go install golang.org/x/tools/cmd/goyacc@v0.6.0"
+	@echo "To install: \"go install golang.org/x/tools/cmd/goyacc@$(GOYACC_VERSION)\" or run \"make install-goyacc\""
 else
-	goyacc -l -o promql/parser/generated_parser.y.go promql/parser/generated_parser.y
+	$(MAKE) promql/parser/generated_parser.y.go
 endif
 
+promql/parser/generated_parser.y.go: promql/parser/generated_parser.y
+	@echo ">> running goyacc to generate the .go file."
+	@goyacc -l -o promql/parser/generated_parser.y.go promql/parser/generated_parser.y
+
+.PHONY: clean-parser
+clean-parser:
+	@echo ">> cleaning generated parser"
+	@rm -f promql/parser/generated_parser.y.go
+
+.PHONY: check-generated-parser
+check-generated-parser: clean-parser promql/parser/generated_parser.y.go
+	@echo ">> checking generated parser"
+	@git diff --exit-code -- promql/parser/generated_parser.y.go || (echo "Generated parser is out of date. Please run 'make parser' and commit the changes." && false)
+
+.PHONY: install-goyacc
+install-goyacc:
+	@echo ">> installing goyacc $(GOYACC_VERSION)"
+	@go install golang.org/x/tools/cmd/goyacc@$(GOYACC_VERSION)
+
 .PHONY: test
 # If we only want to only test go code we have to change the test target
 # which is called by all.
 ifeq ($(GO_ONLY),1)
 test: common-test check-go-mod-version
 else
-test: common-test ui-build-module ui-test ui-lint check-go-mod-version
+test: check-generated-parser common-test ui-build-module ui-test ui-lint check-go-mod-version
 endif
 
 .PHONY: npm_licenses

Makefile.common

@@ -55,7 +55,7 @@ ifneq ($(shell command -v gotestsum 2> /dev/null),)
 endif
 endif
 
-PROMU_VERSION ?= 0.15.0
+PROMU_VERSION ?= 0.17.0
 PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz
 
 SKIP_GOLANGCI_LINT :=

VERSION

@@ -1 +1 @@
-2.51.2
+2.52.0-rc.1

cmd/prometheus/main.go

@@ -217,6 +217,7 @@ func (c *flagConfig) setFeatureListOptions(logger log.Logger) error {
 				level.Info(logger).Log("msg", "Experimental PromQL functions enabled.")
 			case "native-histograms":
 				c.tsdb.EnableNativeHistograms = true
+				c.scrape.EnableNativeHistogramsIngestion = true
 				// Change relevant global variables. Hacky, but it's hard to pass a new option or default to unmarshallers.
 				config.DefaultConfig.GlobalConfig.ScrapeProtocols = config.DefaultProtoFirstScrapeProtocols
 				config.DefaultGlobalConfig.ScrapeProtocols = config.DefaultProtoFirstScrapeProtocols

discovery/metrics.go

@@ -19,16 +19,6 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
-var (
-	clientGoRequestMetrics  = &clientGoRequestMetricAdapter{}
-	clientGoWorkloadMetrics = &clientGoWorkqueueMetricsProvider{}
-)
-
-func init() {
-	clientGoRequestMetrics.RegisterWithK8sGoClient()
-	clientGoWorkloadMetrics.RegisterWithK8sGoClient()
-}
-
 // Metrics to be used with a discovery manager.
 type Metrics struct {
 	FailedConfigs     prometheus.Gauge

discovery/metrics_k8s_client.go

@@ -35,6 +35,11 @@ const (
 	workqueueMetricsNamespace  = KubernetesMetricsNamespace + "_workqueue"
 )
 
+var (
+	clientGoRequestMetrics  = &clientGoRequestMetricAdapter{}
+	clientGoWorkloadMetrics = &clientGoWorkqueueMetricsProvider{}
+)
+
 var (
 	// Metrics for client-go's HTTP requests.
 	clientGoRequestResultMetricVec = prometheus.NewCounterVec(
@@ -135,6 +140,9 @@ func clientGoMetrics() []prometheus.Collector {
 }
 
 func RegisterK8sClientMetricsWithPrometheus(registerer prometheus.Registerer) error {
+	clientGoRequestMetrics.RegisterWithK8sGoClient()
+	clientGoWorkloadMetrics.RegisterWithK8sGoClient()
+
 	for _, collector := range clientGoMetrics() {
 		err := registerer.Register(collector)
 		if err != nil {

discovery/scaleway/instance.go

@@ -174,20 +174,25 @@ func (d *instanceDiscovery) refresh(ctx context.Context) ([]*targetgroup.Group,
 			labels[instanceTagsLabel] = model.LabelValue(tags)
 		}
 
+		addr := ""
 		if server.IPv6 != nil {
 			labels[instancePublicIPv6Label] = model.LabelValue(server.IPv6.Address.String())
+			addr = server.IPv6.Address.String()
 		}
 
 		if server.PublicIP != nil {
 			labels[instancePublicIPv4Label] = model.LabelValue(server.PublicIP.Address.String())
+			addr = server.PublicIP.Address.String()
 		}
 
 		if server.PrivateIP != nil {
 			labels[instancePrivateIPv4Label] = model.LabelValue(*server.PrivateIP)
+			addr = *server.PrivateIP
+		}
 
-			addr := net.JoinHostPort(*server.PrivateIP, strconv.FormatUint(uint64(d.port), 10))
+		if addr != "" {
+			addr := net.JoinHostPort(addr, strconv.FormatUint(uint64(d.port), 10))
 			labels[model.AddressLabel] = model.LabelValue(addr)
-
 			targets = append(targets, labels)
 		}
 	}

discovery/scaleway/instance_test.go

@@ -60,7 +60,7 @@ api_url: %s
 	tg := tgs[0]
 	require.NotNil(t, tg)
 	require.NotNil(t, tg.Targets)
-	require.Len(t, tg.Targets, 2)
+	require.Len(t, tg.Targets, 3)
 
 	for i, lbls := range []model.LabelSet{
 		{
@@ -110,6 +110,28 @@ api_url: %s
 			"__meta_scaleway_instance_type":                   "DEV1-S",
 			"__meta_scaleway_instance_zone":                   "fr-par-1",
 		},
+		{
+			"__address__":                                     "51.158.183.115:80",
+			"__meta_scaleway_instance_boot_type":              "local",
+			"__meta_scaleway_instance_hostname":               "routed-dualstack",
+			"__meta_scaleway_instance_id":                     "4904366a-7e26-4b65-b97b-6392c761247a",
+			"__meta_scaleway_instance_image_arch":             "x86_64",
+			"__meta_scaleway_instance_image_id":               "3e0a5b84-1d69-4993-8fa4-0d7df52d5160",
+			"__meta_scaleway_instance_image_name":             "Ubuntu 22.04 Jammy Jellyfish",
+			"__meta_scaleway_instance_location_cluster_id":    "19",
+			"__meta_scaleway_instance_location_hypervisor_id": "1201",
+			"__meta_scaleway_instance_location_node_id":       "24",
+			"__meta_scaleway_instance_name":                   "routed-dualstack",
+			"__meta_scaleway_instance_organization_id":        "20b3d507-96ac-454c-a795-bc731b46b12f",
+			"__meta_scaleway_instance_project_id":             "20b3d507-96ac-454c-a795-bc731b46b12f",
+			"__meta_scaleway_instance_public_ipv4":            "51.158.183.115",
+			"__meta_scaleway_instance_region":                 "nl-ams",
+			"__meta_scaleway_instance_security_group_id":      "984414da-9fc2-49c0-a925-fed6266fe092",
+			"__meta_scaleway_instance_security_group_name":    "Default security group",
+			"__meta_scaleway_instance_status":                 "running",
+			"__meta_scaleway_instance_type":                   "DEV1-S",
+			"__meta_scaleway_instance_zone":                   "nl-ams-1",
+		},
 	} {
 		t.Run(fmt.Sprintf("item %d", i), func(t *testing.T) {
 			require.Equal(t, lbls, tg.Targets[i])

discovery/scaleway/testdata/instance.json

@@ -216,6 +216,146 @@
       "placement_group": null,
       "private_nics": [],
       "zone": "fr-par-1"
+    },
+    {
+      "id": "4904366a-7e26-4b65-b97b-6392c761247a",
+      "name": "routed-dualstack",
+      "arch": "x86_64",
+      "commercial_type": "DEV1-S",
+      "boot_type": "local",
+      "organization": "20b3d507-96ac-454c-a795-bc731b46b12f",
+      "project": "20b3d507-96ac-454c-a795-bc731b46b12f",
+      "hostname": "routed-dualstack",
+      "image": {
+        "id": "3e0a5b84-1d69-4993-8fa4-0d7df52d5160",
+        "name": "Ubuntu 22.04 Jammy Jellyfish",
+        "organization": "51b656e3-4865-41e8-adbc-0c45bdd780db",
+        "project": "51b656e3-4865-41e8-adbc-0c45bdd780db",
+        "root_volume": {
+          "id": "13d945b9-5e78-4f9d-8ac4-c4bc2fa7c31a",
+          "name": "Ubuntu 22.04 Jammy Jellyfish",
+          "volume_type": "unified",
+          "size": 10000000000
+        },
+        "extra_volumes": {},
+        "public": true,
+        "arch": "x86_64",
+        "creation_date": "2024-02-22T15:52:56.037007+00:00",
+        "modification_date": "2024-02-22T15:52:56.037007+00:00",
+        "default_bootscript": null,
+        "from_server": null,
+        "state": "available",
+        "tags": [],
+        "zone": "nl-ams-1"
+      },
+      "volumes": {
+        "0": {
+          "boot": false,
+          "id": "fe85c817-e67e-4e24-8f13-bde3e9f42620",
+          "name": "Ubuntu 22.04 Jammy Jellyfish",
+          "volume_type": "l_ssd",
+          "export_uri": null,
+          "organization": "20b3d507-96ac-454c-a795-bc731b46b12f",
+          "project": "20b3d507-96ac-454c-a795-bc731b46b12f",
+          "server": {
+            "id": "4904366a-7e26-4b65-b97b-6392c761247a",
+            "name": "routed-dualstack"
+          },
+          "size": 20000000000,
+          "state": "available",
+          "creation_date": "2024-04-19T14:50:14.019739+00:00",
+          "modification_date": "2024-04-19T14:50:14.019739+00:00",
+          "tags": [],
+          "zone": "nl-ams-1"
+        }
+      },
+      "tags": [],
+      "state": "running",
+      "protected": false,
+      "state_detail": "booted",
+      "public_ip": {
+        "id": "53f8f861-7a11-4b16-a4bc-fb8f4b4a11d0",
+        "address": "51.158.183.115",
+        "dynamic": false,
+        "gateway": "62.210.0.1",
+        "netmask": "32",
+        "family": "inet",
+        "provisioning_mode": "dhcp",
+        "tags": [],
+        "state": "attached",
+        "ipam_id": "ec3499ff-a664-49b7-818a-9fe4b95aee5e"
+      },
+      "public_ips": [
+        {
+          "id": "53f8f861-7a11-4b16-a4bc-fb8f4b4a11d0",
+          "address": "51.158.183.115",
+          "dynamic": false,
+          "gateway": "62.210.0.1",
+          "netmask": "32",
+          "family": "inet",
+          "provisioning_mode": "dhcp",
+          "tags": [],
+          "state": "attached",
+          "ipam_id": "ec3499ff-a664-49b7-818a-9fe4b95aee5e"
+        },
+        {
+          "id": "f52a8c81-0875-4aee-b96e-eccfc6bec367",
+          "address": "2001:bc8:1640:1568:dc00:ff:fe21:91b",
+          "dynamic": false,
+          "gateway": "fe80::dc00:ff:fe21:91c",
+          "netmask": "64",
+          "family": "inet6",
+          "provisioning_mode": "slaac",
+          "tags": [],
+          "state": "attached",
+          "ipam_id": "40d1e6ea-e932-42f9-8acb-55398bec7ad6"
+        }
+      ],
+      "mac_address": "de:00:00:21:09:1b",
+      "routed_ip_enabled": true,
+      "ipv6": null,
+      "extra_networks": [],
+      "dynamic_ip_required": false,
+      "enable_ipv6": false,
+      "private_ip": null,
+      "creation_date": "2024-04-19T14:50:14.019739+00:00",
+      "modification_date": "2024-04-19T14:52:21.181670+00:00",
+      "bootscript": {
+        "id": "5a520dda-96d6-4ed2-acd1-1d526b6859fe",
+        "public": true,
+        "title": "x86_64 mainline 4.4.182 rev1",
+        "architecture": "x86_64",
+        "organization": "11111111-1111-4111-8111-111111111111",
+        "project": "11111111-1111-4111-8111-111111111111",
+        "kernel": "http://10.196.2.9/kernel/x86_64-mainline-lts-4.4-4.4.182-rev1/vmlinuz-4.4.182",
+        "dtb": "",
+        "initrd": "http://10.196.2.9/initrd/initrd-Linux-x86_64-v3.14.6.gz",
+        "bootcmdargs": "LINUX_COMMON scaleway boot=local nbd.max_part=16",
+        "default": true,
+        "zone": "nl-ams-1"
+      },
+      "security_group": {
+        "id": "984414da-9fc2-49c0-a925-fed6266fe092",
+        "name": "Default security group"
+      },
+      "location": {
+        "zone_id": "ams1",
+        "platform_id": "23",
+        "cluster_id": "19",
+        "hypervisor_id": "1201",
+        "node_id": "24"
+      },
+      "maintenances": [],
+      "allowed_actions": [
+        "poweroff",
+        "terminate",
+        "reboot",
+        "stop_in_place",
+        "backup"
+      ],
+      "placement_group": null,
+      "private_nics": [],
+      "zone": "nl-ams-1"
     }
   ]
 }

docs/configuration/configuration.md

@@ -2952,9 +2952,10 @@ The following meta labels are available on targets during [relabeling](#relabel_
 * `__meta_scaleway_instance_type`: commercial type of the server
 * `__meta_scaleway_instance_zone`: the zone of the server (ex: `fr-par-1`, complete list [here](https://developers.scaleway.com/en/products/instance/api/#introduction))
 
-This role uses the private IPv4 address by default. This can be
+This role uses the first address it finds in the following order: private IPv4, public IPv4, public IPv6. This can be
 changed with relabeling, as demonstrated in [the Prometheus scaleway-sd
 configuration file](/documentation/examples/prometheus-scaleway.yml).
+Should an instance have no address before relabeling, it will not be added to the target list and you will not be able to relabel it.
 
 #### Baremetal role
 

docs/querying/remote_read_api.md

@@ -5,63 +5,7 @@ sort_rank: 7
 
 # Remote Read API
 
-This is not currently considered part of the stable API and is subject to change
+> This is not currently considered part of the stable API and is subject to change even between non-major version releases of Prometheus.
-even between non-major version releases of Prometheus.
-
-## Format overview
-
-The API response format is JSON. Every successful API request returns a `2xx`
-status code.
-
-Invalid requests that reach the API handlers return a JSON error object
-and one of the following HTTP response codes:
-
-- `400 Bad Request` when parameters are missing or incorrect.
-- `422 Unprocessable Entity` when an expression can't be executed
-  ([RFC4918](https://tools.ietf.org/html/rfc4918#page-78)).
-- `503 Service Unavailable` when queries time out or abort.
-
-Other non-`2xx` codes may be returned for errors occurring before the API
-endpoint is reached.
-
-An array of warnings may be returned if there are errors that do
-not inhibit the request execution. All of the data that was successfully
-collected will be returned in the data field.
-
-The JSON response envelope format is as follows:
-
-```
-{
-  "status": "success" | "error",
-  "data": <data>,
-
-  // Only set if status is "error". The data field may still hold
-  // additional data.
-  "errorType": "<string>",
-  "error": "<string>",
-
-  // Only if there were warnings while executing the request.
-  // There will still be data in the data field.
-  "warnings": ["<string>"]
-}
-```
-
-Generic placeholders are defined as follows:
-
-* `<rfc3339 | unix_timestamp>`: Input timestamps may be provided either in
-[RFC3339](https://www.ietf.org/rfc/rfc3339.txt) format or as a Unix timestamp
-in seconds, with optional decimal places for sub-second precision. Output
-timestamps are always represented as Unix timestamps in seconds.
-* `<series_selector>`: Prometheus [time series
-selectors](basics.md#time-series-selectors) like `http_requests_total` or
-`http_requests_total{method=~"(GET|POST)"}` and need to be URL-encoded.
-* `<duration>`: [Prometheus duration strings](basics.md#time_durations).
-For example, `5m` refers to a duration of 5 minutes.
-* `<bool>`: boolean values (strings `true` and `false`).
-
-Note: Names of query parameters that may be repeated end with `[]`.
-
-## Remote Read API
 
 This API provides data read functionality from Prometheus. This interface expects [snappy](https://github.com/google/snappy) compression.
 The API definition is located [here](https://github.com/prometheus/prometheus/blob/master/prompb/remote.proto).
@@ -79,5 +23,3 @@ This returns a message that includes a list of raw samples.
 
 These streamed chunks utilize an XOR algorithm inspired by the [Gorilla](http://www.vldb.org/pvldb/vol8/p1816-teller.pdf)
 compression to encode the chunks. However, it provides resolution to the millisecond instead of to the second.
-
-

docs/storage.md

@@ -84,8 +84,10 @@ or 31 days, whichever is smaller.
 Prometheus has several flags that configure local storage. The most important are:
 
 - `--storage.tsdb.path`: Where Prometheus writes its database. Defaults to `data/`.
-- `--storage.tsdb.retention.time`: When to remove old data. Defaults to `15d`.
+- `--storage.tsdb.retention.time`: How long to retain samples in storage. When this flag is
-  Overrides `storage.tsdb.retention` if this flag is set to anything other than default.
+  set, it overrides `storage.tsdb.retention`. If neither this flag nor `storage.tsdb.retention`
+  nor `storage.tsdb.retention.size` is set, the retention time defaults to `15d`.
+  Supported units: y, w, d, h, m, s, ms.
 - `--storage.tsdb.retention.size`: The maximum number of bytes of storage blocks to retain.
   The oldest data will be removed first. Defaults to `0` or disabled. Units supported:
   B, KB, MB, GB, TB, PB, EB. Ex: "512MB". Based on powers-of-2, so 1KB is 1024B. Only

documentation/examples/remote_storage/go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/influxdata/influxdb v1.11.5
 	github.com/prometheus/client_golang v1.19.0
 	github.com/prometheus/common v0.53.0
-	github.com/prometheus/prometheus v0.51.1
+	github.com/prometheus/prometheus v0.51.2
 	github.com/stretchr/testify v1.9.0
 )
 

documentation/examples/remote_storage/go.sum

@@ -279,8 +279,8 @@ github.com/prometheus/procfs v0.1.3/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4O
 github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 github.com/prometheus/procfs v0.12.0 h1:jluTpSng7V9hY0O2R9DzzJHYb2xULk9VTR1V1R/k6Bo=
 github.com/prometheus/procfs v0.12.0/go.mod h1:pcuDEFsWDnvcgNzo4EEweacyhjeA9Zk3cnaOZAZEfOo=
-github.com/prometheus/prometheus v0.51.1 h1:V2e7x2oiUC0Megp26+xjffxBf9EGkyP1iQuGd4VjUSU=
+github.com/prometheus/prometheus v0.51.2 h1:U0faf1nT4CB9DkBW87XLJCBi2s8nwWXdTbyzRUAkX0w=
-github.com/prometheus/prometheus v0.51.1/go.mod h1:yv4MwOn3yHMQ6MZGHPg/U7Fcyqf+rxqiZfSur6myVtc=
+github.com/prometheus/prometheus v0.51.2/go.mod h1:yv4MwOn3yHMQ6MZGHPg/U7Fcyqf+rxqiZfSur6myVtc=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
 github.com/scaleway/scaleway-sdk-go v1.0.0-beta.25 h1:/8rfZAdFfafRXOgz+ZpMZZWZ5pYggCY9t7e/BvjaBHM=

go.mod

@@ -41,7 +41,7 @@ require (
 	github.com/json-iterator/go v1.1.12
 	github.com/klauspost/compress v1.17.8
 	github.com/kolo/xmlrpc v0.0.0-20220921171641-a4b6fa1dd06b
-	github.com/linode/linodego v1.32.0
+	github.com/linode/linodego v1.33.0
 	github.com/miekg/dns v1.1.59
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822
 	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f
@@ -80,10 +80,10 @@ require (
 	golang.org/x/sys v0.19.0
 	golang.org/x/time v0.5.0
 	golang.org/x/tools v0.20.0
-	google.golang.org/api v0.174.0
+	google.golang.org/api v0.177.0
 	google.golang.org/genproto/googleapis/api v0.0.0-20240415180920-8c6c420018be
 	google.golang.org/grpc v1.63.2
-	google.golang.org/protobuf v1.33.0
+	google.golang.org/protobuf v1.34.0
 	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.1
 	k8s.io/api v0.29.3
@@ -94,8 +94,8 @@ require (
 )
 
 require (
-	cloud.google.com/go/auth v0.2.0 // indirect
+	cloud.google.com/go/auth v0.3.0 // indirect
-	cloud.google.com/go/auth/oauth2adapt v0.2.0 // indirect
+	cloud.google.com/go/auth/oauth2adapt v0.2.2 // indirect
 	cloud.google.com/go/compute/metadata v0.3.0 // indirect
 	github.com/Azure/azure-sdk-for-go/sdk/internal v1.5.2 // indirect
 	github.com/AzureAD/microsoft-authentication-library-for-go v1.2.2 // indirect
@@ -191,7 +191,7 @@ require (
 	golang.org/x/mod v0.17.0 // indirect
 	golang.org/x/term v0.19.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240415180920-8c6c420018be // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240429193739-8cf5692501f6 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gotest.tools/v3 v3.0.3 // indirect

go.sum

@@ -12,10 +12,10 @@ cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bP
 cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
 cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
 cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go/auth v0.2.0 h1:y6oTcpMSbOcXbwYgUUrvI+mrQ2xbrcdpPgtVbCGTLTk=
+cloud.google.com/go/auth v0.3.0 h1:PRyzEpGfx/Z9e8+lHsbkoUVXD0gnu4MNmm7Gp8TQNIs=
-cloud.google.com/go/auth v0.2.0/go.mod h1:+yb+oy3/P0geX6DLKlqiGHARGR6EX2GRtYCzWOCQSbU=
+cloud.google.com/go/auth v0.3.0/go.mod h1:lBv6NKTWp8E3LPzmO1TbiiRKc4drLOfHsgmlH9ogv5w=
-cloud.google.com/go/auth/oauth2adapt v0.2.0 h1:FR8zevgQwu+8CqiOT5r6xCmJa3pJC/wdXEEPF1OkNhA=
+cloud.google.com/go/auth/oauth2adapt v0.2.2 h1:+TTV8aXpjeChS9M+aTtN/TjdQnzJvmzKFt//oWu7HX4=
-cloud.google.com/go/auth/oauth2adapt v0.2.0/go.mod h1:AfqujpDAlTfLfeCIl/HJZZlIxD8+nJoZ5e0x1IxGq5k=
+cloud.google.com/go/auth/oauth2adapt v0.2.2/go.mod h1:wcYjgpZI9+Yu7LyYBg4pqSiaRkfEK3GQcpb7C/uyF1Q=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
@@ -471,8 +471,8 @@ github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/lightstep/lightstep-tracer-common/golang/gogo v0.0.0-20190605223551-bc2310a04743/go.mod h1:qklhhLq1aX+mtWk9cPHPzaBjWImj5ULL6C7HFJtXQMM=
 github.com/lightstep/lightstep-tracer-go v0.18.1/go.mod h1:jlF1pusYV4pidLvZ+XD0UBX0ZE6WURAspgAczcDHrL4=
-github.com/linode/linodego v1.32.0 h1:OmZzB3iON6uu84VtLFf64uKmAQqJJarvmsVguroioPI=
+github.com/linode/linodego v1.33.0 h1:cX2FYry7r6CA1ujBMsdqiM4VhvIQtnWsOuVblzfBhCw=
-github.com/linode/linodego v1.32.0/go.mod h1:y8GDP9uLVH4jTB9qyrgw79qfKdYJmNCGUOJmfuiOcmI=
+github.com/linode/linodego v1.33.0/go.mod h1:dSJJgIwqZCF5wnpuC6w5cyIbRtcexAm7uVvuJopGB40=
 github.com/lyft/protoc-gen-validate v0.0.13/go.mod h1:XbGvPuh87YZc5TdIa2/I4pLk0QoUACkjt2znoq26NVQ=
 github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
 github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
@@ -1045,8 +1045,8 @@ google.golang.org/api v0.20.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/
 google.golang.org/api v0.22.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
 google.golang.org/api v0.24.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
 google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
-google.golang.org/api v0.174.0 h1:zB1BWl7ocxfTea2aQ9mgdzXjnfPySllpPOskdnO+q34=
+google.golang.org/api v0.177.0 h1:8a0p/BbPa65GlqGWtUKxot4p0TV8OGOfyTjtmkXNXmk=
-google.golang.org/api v0.174.0/go.mod h1:aC7tB6j0HR1Nl0ni5ghpx6iLasmAX78Zkh/wgxAAjLg=
+google.golang.org/api v0.177.0/go.mod h1:srbhue4MLjkjbkux5p3dw/ocYOSZTaIEvf7bCOnFQDw=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -1085,8 +1085,8 @@ google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7Fc
 google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto/googleapis/api v0.0.0-20240415180920-8c6c420018be h1:Zz7rLWqp0ApfsR/l7+zSHhY3PMiH2xqgxlfYfAfNpoU=
 google.golang.org/genproto/googleapis/api v0.0.0-20240415180920-8c6c420018be/go.mod h1:dvdCTIoAGbkWbcIKBniID56/7XHTt6WfxXNMxuziJ+w=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240415180920-8c6c420018be h1:LG9vZxsWGOmUKieR8wPAUR3u3MpnYFQZROPIMaXh7/A=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240429193739-8cf5692501f6 h1:DujSIu+2tC9Ht0aPNA7jgj23Iq8Ewi5sgkQ++wdvonE=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240415180920-8c6c420018be/go.mod h1:WtryC6hu0hhx87FDGxWCDptyssuo68sk10vYjF+T9fY=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240429193739-8cf5692501f6/go.mod h1:WtryC6hu0hhx87FDGxWCDptyssuo68sk10vYjF+T9fY=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.0/go.mod h1:chYK+tFQF0nDUGJgXMSgLCQk3phJEuONr2DCgLDdAQM=
@@ -1118,8 +1118,8 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
+google.golang.org/protobuf v1.34.0 h1:Qo/qEd2RZPCf2nKuorzksSknv0d3ERwp1vFG38gSmH4=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.34.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

model/labels/regexp.go

@@ -16,6 +16,7 @@ package labels
 import (
 	"slices"
 	"strings"
+	"unicode/utf8"
 
 	"github.com/grafana/regexp"
 	"github.com/grafana/regexp/syntax"
@@ -827,8 +828,7 @@ type zeroOrOneCharacterStringMatcher struct {
 }
 
 func (m *zeroOrOneCharacterStringMatcher) Matches(s string) bool {
-	// Zero or one.
+	if moreThanOneRune(s) {
-	if len(s) > 1 {
 		return false
 	}
 
@@ -840,6 +840,27 @@ func (m *zeroOrOneCharacterStringMatcher) Matches(s string) bool {
 	return s[0] != '\n'
 }
 
+// moreThanOneRune returns true if there are more than one runes in the string.
+// It doesn't check whether the string is valid UTF-8.
+// The return value should be always equal to utf8.RuneCountInString(s) > 1,
+// but the function is optimized for the common case where the string prefix is ASCII.
+func moreThanOneRune(s string) bool {
+	// If len(s) is exactly one or zero, there can't be more than one rune.
+	// Exit through this path quickly.
+	if len(s) <= 1 {
+		return false
+	}
+
+	// There's one or more bytes:
+	// If first byte is ASCII then there are multiple runes if there are more bytes after that.
+	if s[0] < utf8.RuneSelf {
+		return len(s) > 1
+	}
+
+	// Less common case: first is a multibyte rune.
+	return utf8.RuneCountInString(s) > 1
+}
+
 // trueMatcher is a stringMatcher which matches any string (always returns true).
 type trueMatcher struct{}
 

model/labels/regexp_test.go

@@ -84,7 +84,7 @@ var (
 		"foo", " foo bar", "bar", "buzz\nbar", "bar foo", "bfoo", "\n", "\nfoo", "foo\n", "hello foo world", "hello foo\n world", "",
 		"FOO", "Foo", "OO", "Oo", "\nfoo\n", strings.Repeat("f", 20), "prometheus", "prometheus_api_v1", "prometheus_api_v1_foo",
 		"10.0.1.20", "10.0.2.10", "10.0.3.30", "10.0.4.40",
-		"foofoo0", "foofoo",
+		"foofoo0", "foofoo", "😀foo0",
 
 		// Values matching / not matching the test regexps on long alternations.
 		"zQPbMkNO", "zQPbMkNo", "jyyfj00j0061", "jyyfj00j006", "jyyfj00j00612", "NNSPdvMi", "NNSPdvMiXXX", "NNSPdvMixxx", "nnSPdvMi", "nnSPdvMiXXX",

promql/engine.go

@@ -2027,27 +2027,23 @@ func (ev *evaluator) rangeEvalTimestampFunctionOverVectorSelector(vs *parser.Vec
 		vec := make(Vector, 0, len(vs.Series))
 		for i, s := range vs.Series {
 			it := seriesIterators[i]
-			t, f, h, ok := ev.vectorSelectorSingle(it, vs, enh.Ts)
+			t, _, _, ok := ev.vectorSelectorSingle(it, vs, enh.Ts)
-			if ok {
+			if !ok {
+				continue
+			}
+
+			// Note that we ignore the sample values because call only cares about the timestamp.
 			vec = append(vec, Sample{
 				Metric: s.Labels(),
 				T:      t,
-					F:      f,
-					H:      h,
 			})
-				histSize := 0
-				if h != nil {
-					histSize := h.Size() / 16 // 16 bytes per sample.
-					ev.currentSamples += histSize
-				}
-				ev.currentSamples++
 
-				ev.samplesStats.IncrementSamplesAtTimestamp(enh.Ts, int64(1+histSize))
+			ev.currentSamples++
+			ev.samplesStats.IncrementSamplesAtTimestamp(enh.Ts, 1)
 			if ev.currentSamples > ev.maxSamples {
 				ev.error(ErrTooManySamples(env))
 			}
 		}
-		}
 		ev.samplesStats.UpdatePeak(ev.currentSamples)
 		vec, annos := call([]parser.Value{vec}, e.Args, enh)
 		return vec, ws.Merge(annos)

promql/engine_test.go

@@ -818,7 +818,7 @@ load 10s
 		{
 			Query:        "timestamp(metricWith1HistogramEvery10Seconds)",
 			Start:        time.Unix(21, 0),
-			PeakSamples:  15, // histogram size 13 + 1 extra because Sample overhead + 1 float result
+			PeakSamples:  2,
 			TotalSamples: 1, // 1 float sample (because of timestamp) / 10 seconds
 			TotalSamplesPerStep: stats.TotalSamplesPerStep{
 				21000: 1,
@@ -1116,7 +1116,7 @@ load 10s
 			Start:        time.Unix(201, 0),
 			End:          time.Unix(220, 0),
 			Interval:     5 * time.Second,
-			PeakSamples:  18, // 13 histogram size + 1 extra because of Sample overhead + 4 float results
+			PeakSamples:  5,
 			TotalSamples: 4, // 1 sample per query * 4 steps
 			TotalSamplesPerStep: stats.TotalSamplesPerStep{
 				201000: 1,

promql/parser/printer.go

@@ -204,8 +204,8 @@ func (node *VectorSelector) String() string {
 		labelStrings = make([]string, 0, len(node.LabelMatchers)-1)
 	}
 	for _, matcher := range node.LabelMatchers {
-		// Only include the __name__ label if its equality matching and matches the name.
+		// Only include the __name__ label if its equality matching and matches the name, but don't skip if it's an explicit empty name matcher.
-		if matcher.Name == labels.MetricName && matcher.Type == labels.MatchEqual && matcher.Value == node.Name {
+		if matcher.Name == labels.MetricName && matcher.Type == labels.MatchEqual && matcher.Value == node.Name && matcher.Value != "" {
 			continue
 		}
 		labelStrings = append(labelStrings, matcher.String())

promql/parser/printer_test.go

@@ -135,6 +135,9 @@ func TestExprString(t *testing.T) {
 		{
 			in: `a[1m] @ end()`,
 		},
+		{
+			in: `{__name__="",a="x"}`,
+		},
 	}
 
 	for _, test := range inputs {
@@ -216,6 +219,16 @@ func TestVectorSelector_String(t *testing.T) {
 			},
 			expected: `{__name__="foobar"}`,
 		},
+		{
+			name: "empty name matcher",
+			vs: VectorSelector{
+				LabelMatchers: []*labels.Matcher{
+					labels.MustNewMatcher(labels.MatchEqual, labels.MetricName, ""),
+					labels.MustNewMatcher(labels.MatchEqual, "a", "x"),
+				},
+			},
+			expected: `{__name__="",a="x"}`,
+		},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
 			require.Equal(t, tc.expected, tc.vs.String())

promql/query_logger.go

@@ -96,12 +96,14 @@ func getMMapedFile(filename string, filesize int, logger log.Logger) ([]byte, io
 
 	err = file.Truncate(int64(filesize))
 	if err != nil {
+		file.Close()
 		level.Error(logger).Log("msg", "Error setting filesize.", "filesize", filesize, "err", err)
 		return nil, nil, err
 	}
 
 	fileAsBytes, err := mmap.Map(file, mmap.RDWR, 0)
 	if err != nil {
+		file.Close()
 		level.Error(logger).Log("msg", "Failed to mmap", "file", filename, "Attempted size", filesize, "err", err)
 		return nil, nil, err
 	}

promql/query_logger_test.go

@@ -110,10 +110,7 @@ func TestMMapFile(t *testing.T) {
 	filename := file.Name()
 	defer os.Remove(filename)
 
-	fileAsBytes, closer, err := getMMapedFile(filename, 2, nil)
+	fileAsBytes, _, err := getMMapedFile(filename, 2, nil)
-	if err != nil {
-		t.Cleanup(func() { closer.Close() })
-	}
 
 	require.NoError(t, err)
 	copy(fileAsBytes, "ab")

rules/alerting.go

@@ -246,13 +246,16 @@ func (r *AlertingRule) sample(alert *Alert, ts time.Time) promql.Sample {
 	return s
 }
 
-// forStateSample returns the sample for ALERTS_FOR_STATE.
+// forStateSample returns a promql.Sample with the rule labels, `ALERTS_FOR_STATE` as the metric name and the rule name as the `alertname` label.
+// Optionally, if an alert is provided it'll copy the labels of the alert into the sample labels.
 func (r *AlertingRule) forStateSample(alert *Alert, ts time.Time, v float64) promql.Sample {
 	lb := labels.NewBuilder(r.labels)
 
+	if alert != nil {
 		alert.Labels.Range(func(l labels.Label) {
 			lb.Set(l.Name, l.Value)
 		})
+	}
 
 	lb.Set(labels.MetricName, alertForStateMetricName)
 	lb.Set(labels.AlertName, r.name)
@@ -265,9 +268,11 @@ func (r *AlertingRule) forStateSample(alert *Alert, ts time.Time, v float64) pro
 	return s
 }
 
-// QueryforStateSeries returns the series for ALERTS_FOR_STATE.
+// QueryForStateSeries returns the series for ALERTS_FOR_STATE of the alert rule.
-func (r *AlertingRule) QueryforStateSeries(ctx context.Context, alert *Alert, q storage.Querier) (storage.Series, error) {
+func (r *AlertingRule) QueryForStateSeries(ctx context.Context, q storage.Querier) (storage.SeriesSet, error) {
-	smpl := r.forStateSample(alert, time.Now(), 0)
+	// We use a sample to ease the building of matchers.
+	// Don't provide an alert as we want matchers that match all series for the alert rule.
+	smpl := r.forStateSample(nil, time.Now(), 0)
 	var matchers []*labels.Matcher
 	smpl.Metric.Range(func(l labels.Label) {
 		mt, err := labels.NewMatcher(labels.MatchEqual, l.Name, l.Value)
@@ -276,20 +281,9 @@ func (r *AlertingRule) QueryforStateSeries(ctx context.Context, alert *Alert, q
 		}
 		matchers = append(matchers, mt)
 	})
+
 	sset := q.Select(ctx, false, nil, matchers...)
-
+	return sset, sset.Err()
-	var s storage.Series
-	for sset.Next() {
-		// Query assures that smpl.Metric is included in sset.At().Labels(),
-		// hence just checking the length would act like equality.
-		// (This is faster than calling labels.Compare again as we already have some info).
-		if sset.At().Labels().Len() == len(matchers) {
-			s = sset.At()
-			break
-		}
-	}
-
-	return s, sset.Err()
 }
 
 // SetEvaluationDuration updates evaluationDuration to the duration it took to evaluate the rule on its last evaluation.
@@ -457,8 +451,17 @@ func (r *AlertingRule) Eval(ctx context.Context, ts time.Time, query QueryFunc,
 				}
 			}
 
-			// If the alert was previously firing, keep it around for a given
+			// If the alert is resolved (was firing but is now inactive) keep it for
-			// retention time so it is reported as resolved to the AlertManager.
+			// at least the retention period. This is important for a number of reasons:
+			//
+			// 1. It allows for Prometheus to be more resilient to network issues that
+			//    would otherwise prevent a resolved alert from being reported as resolved
+			//    to Alertmanager.
+			//
+			// 2. It helps reduce the chance of resolved notifications being lost if
+			//    Alertmanager crashes or restarts between receiving the resolved alert
+			//    from Prometheus and sending the resolved notification. This tends to
+			//    occur for routes with large Group intervals.
 			if a.State == StatePending || (!a.ResolvedAt.IsZero() && ts.Sub(a.ResolvedAt) > resolvedRetention) {
 				delete(r.active, fp)
 			}
@@ -548,6 +551,13 @@ func (r *AlertingRule) ForEachActiveAlert(f func(*Alert)) {
 	}
 }
 
+func (r *AlertingRule) ActiveAlertsCount() int {
+	r.activeMtx.Lock()
+	defer r.activeMtx.Unlock()
+
+	return len(r.active)
+}
+
 func (r *AlertingRule) sendAlerts(ctx context.Context, ts time.Time, resendDelay, interval time.Duration, notifyFunc NotifyFunc) {
 	alerts := []*Alert{}
 	r.ForEachActiveAlert(func(alert *Alert) {

rules/alerting_test.go

@@ -710,19 +710,17 @@ func TestQueryForStateSeries(t *testing.T) {
 			labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil,
 		)
 
-		alert := &Alert{
+		sample := rule.forStateSample(nil, time.Time{}, 0)
-			State:       0,
-			Labels:      labels.EmptyLabels(),
-			Annotations: labels.EmptyLabels(),
-			Value:       0,
-			ActiveAt:    time.Time{},
-			FiredAt:     time.Time{},
-			ResolvedAt:  time.Time{},
-			LastSentAt:  time.Time{},
-			ValidUntil:  time.Time{},
-		}
 
-		series, err := rule.QueryforStateSeries(context.Background(), alert, querier)
+		seriesSet, err := rule.QueryForStateSeries(context.Background(), querier)
+
+		var series storage.Series
+		for seriesSet.Next() {
+			if seriesSet.At().Labels().Len() == sample.Metric.Len() {
+				series = seriesSet.At()
+				break
+			}
+		}
 
 		require.Equal(t, tst.expectedSeries, series)
 		require.Equal(t, tst.expectedError, err)
@@ -1025,3 +1023,24 @@ func TestAlertingRule_SetNoDependencyRules(t *testing.T) {
 	rule.SetNoDependencyRules(true)
 	require.True(t, rule.NoDependencyRules())
 }
+
+func TestAlertingRule_ActiveAlertsCount(t *testing.T) {
+	rule := NewAlertingRule(
+		"TestRule",
+		nil,
+		time.Minute,
+		0,
+		labels.FromStrings("severity", "critical"),
+		labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil,
+	)
+
+	require.Equal(t, 0, rule.ActiveAlertsCount())
+
+	// Set an active alert.
+	lbls := labels.FromStrings("a1", "1")
+	h := lbls.Hash()
+	al := &Alert{State: StateFiring, Labels: lbls, ActiveAt: time.Now()}
+	rule.active[h] = al
+
+	require.Equal(t, 1, rule.ActiveAlertsCount())
+}

rules/group.go

@@ -230,7 +230,11 @@ func (g *Group) run(ctx context.Context) {
 			g.evalIterationFunc(ctx, g, evalTimestamp)
 		}
 
-		g.RestoreForState(time.Now())
+		restoreStartTime := time.Now()
+		g.RestoreForState(restoreStartTime)
+		totalRestoreTimeSeconds := time.Since(restoreStartTime).Seconds()
+		g.metrics.GroupLastRestoreDuration.WithLabelValues(GroupKey(g.file, g.name)).Set(totalRestoreTimeSeconds)
+		level.Debug(g.logger).Log("msg", "'for' state restoration completed", "duration_seconds", totalRestoreTimeSeconds)
 		g.shouldRestore = false
 	}
 
@@ -660,25 +664,40 @@ func (g *Group) RestoreForState(ts time.Time) {
 			continue
 		}
 
-		alertRule.ForEachActiveAlert(func(a *Alert) {
+		sset, err := alertRule.QueryForStateSeries(g.opts.Context, q)
-			var s storage.Series
-
-			s, err := alertRule.QueryforStateSeries(g.opts.Context, a, q)
 		if err != nil {
-				// Querier Warnings are ignored. We do not care unless we have an error.
 			level.Error(g.logger).Log(
 				"msg", "Failed to restore 'for' state",
 				labels.AlertName, alertRule.Name(),
 				"stage", "Select",
 				"err", err,
 			)
-				return
+			// Even if we failed to query the `ALERT_FOR_STATE` series, we currently have no way to retry the restore process.
+			// So the best we can do is mark the rule as restored and let it eventually fire.
+			alertRule.SetRestored(true)
+			continue
 		}
 
-			if s == nil {
+		// While not technically the same number of series we expect, it's as good of an approximation as any.
-				return
+		seriesByLabels := make(map[string]storage.Series, alertRule.ActiveAlertsCount())
+		for sset.Next() {
+			seriesByLabels[sset.At().Labels().DropMetricName().String()] = sset.At()
 		}
 
+		// No results for this alert rule.
+		if len(seriesByLabels) == 0 {
+			level.Debug(g.logger).Log("msg", "No series found to restore the 'for' state of the alert rule", labels.AlertName, alertRule.Name())
+			alertRule.SetRestored(true)
+			continue
+		}
+
+		alertRule.ForEachActiveAlert(func(a *Alert) {
+			var s storage.Series
+
+			s, ok := seriesByLabels[a.Labels.String()]
+			if !ok {
+				return
+			}
 			// Series found for the 'for' state.
 			var t int64
 			var v float64
@@ -788,6 +807,7 @@ type Metrics struct {
 	GroupInterval            *prometheus.GaugeVec
 	GroupLastEvalTime        *prometheus.GaugeVec
 	GroupLastDuration        *prometheus.GaugeVec
+	GroupLastRestoreDuration *prometheus.GaugeVec
 	GroupRules               *prometheus.GaugeVec
 	GroupSamples             *prometheus.GaugeVec
 }
@@ -865,6 +885,14 @@ func NewGroupMetrics(reg prometheus.Registerer) *Metrics {
 			},
 			[]string{"rule_group"},
 		),
+		GroupLastRestoreDuration: prometheus.NewGaugeVec(
+			prometheus.GaugeOpts{
+				Namespace: namespace,
+				Name:      "rule_group_last_restore_duration_seconds",
+				Help:      "The duration of the last alert rules alerts restoration using the `ALERTS_FOR_STATE` series.",
+			},
+			[]string{"rule_group"},
+		),
 		GroupRules: prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{
 				Namespace: namespace,
@@ -894,6 +922,7 @@ func NewGroupMetrics(reg prometheus.Registerer) *Metrics {
 			m.GroupInterval,
 			m.GroupLastEvalTime,
 			m.GroupLastDuration,
+			m.GroupLastRestoreDuration,
 			m.GroupRules,
 			m.GroupSamples,
 		)

rules/manager_test.go

@@ -397,46 +397,58 @@ func TestForStateRestore(t *testing.T) {
 		group.Eval(context.TODO(), evalTime)
 	}
 
-	exp := rule.ActiveAlerts()
-	for _, aa := range exp {
-		require.Zero(t, aa.Labels.Get(model.MetricNameLabel), "%s label set on active alert: %s", model.MetricNameLabel, aa.Labels)
-	}
-	sort.Slice(exp, func(i, j int) bool {
-		return labels.Compare(exp[i].Labels, exp[j].Labels) < 0
-	})
-
 	// Prometheus goes down here. We create new rules and groups.
 	type testInput struct {
+		name            string
 		restoreDuration time.Duration
-		alerts          []*Alert
+		expectedAlerts  []*Alert
 
 		num          int
 		noRestore    bool
 		gracePeriod  bool
 		downDuration time.Duration
+		before       func()
 	}
 
 	tests := []testInput{
 		{
-			// Normal restore (alerts were not firing).
+			name:            "normal restore (alerts were not firing)",
 			restoreDuration: 15 * time.Minute,
-			alerts:          rule.ActiveAlerts(),
+			expectedAlerts:  rule.ActiveAlerts(),
 			downDuration:    10 * time.Minute,
 		},
 		{
-			// Testing Outage Tolerance.
+			name:            "outage tolerance",
 			restoreDuration: 40 * time.Minute,
 			noRestore:       true,
 			num:             2,
 		},
 		{
-			// No active alerts.
+			name:            "no active alerts",
 			restoreDuration: 50 * time.Minute,
-			alerts:          []*Alert{},
+			expectedAlerts:  []*Alert{},
+		},
+		{
+			name:            "test the grace period",
+			restoreDuration: 25 * time.Minute,
+			expectedAlerts:  []*Alert{},
+			gracePeriod:     true,
+			before: func() {
+				for _, duration := range []time.Duration{10 * time.Minute, 15 * time.Minute, 20 * time.Minute} {
+					evalTime := baseTime.Add(duration)
+					group.Eval(context.TODO(), evalTime)
+				}
+			},
+			num: 2,
 		},
 	}
 
-	testFunc := func(tst testInput) {
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.before != nil {
+				tt.before()
+			}
+
 			newRule := NewAlertingRule(
 				"HTTPRequestRateLow",
 				expr,
@@ -456,7 +468,7 @@ func TestForStateRestore(t *testing.T) {
 			newGroups := make(map[string]*Group)
 			newGroups["default;"] = newGroup
 
-		restoreTime := baseTime.Add(tst.restoreDuration)
+			restoreTime := baseTime.Add(tt.restoreDuration)
 			// First eval before restoration.
 			newGroup.Eval(context.TODO(), restoreTime)
 			// Restore happens here.
@@ -470,20 +482,24 @@ func TestForStateRestore(t *testing.T) {
 				return labels.Compare(got[i].Labels, got[j].Labels) < 0
 			})
 
+			// In all cases, we expect the restoration process to have completed.
+			require.Truef(t, newRule.Restored(), "expected the rule restoration process to have completed")
+
 			// Checking if we have restored it correctly.
 			switch {
-		case tst.noRestore:
+			case tt.noRestore:
-			require.Len(t, got, tst.num)
+				require.Len(t, got, tt.num)
 				for _, e := range got {
 					require.Equal(t, e.ActiveAt, restoreTime)
 				}
-		case tst.gracePeriod:
+			case tt.gracePeriod:
-			require.Len(t, got, tst.num)
+
+				require.Len(t, got, tt.num)
 				for _, e := range got {
 					require.Equal(t, opts.ForGracePeriod, e.ActiveAt.Add(alertForDuration).Sub(restoreTime))
 				}
 			default:
-			exp := tst.alerts
+				exp := tt.expectedAlerts
 				require.Equal(t, len(exp), len(got))
 				sortAlerts(exp)
 				sortAlerts(got)
@@ -492,27 +508,12 @@ func TestForStateRestore(t *testing.T) {
 
 					// Difference in time should be within 1e6 ns, i.e. 1ms
 					// (due to conversion between ns & ms, float64 & int64).
-				activeAtDiff := float64(e.ActiveAt.Unix() + int64(tst.downDuration/time.Second) - got[i].ActiveAt.Unix())
+					activeAtDiff := float64(e.ActiveAt.Unix() + int64(tt.downDuration/time.Second) - got[i].ActiveAt.Unix())
 					require.Equal(t, 0.0, math.Abs(activeAtDiff), "'for' state restored time is wrong")
 				}
 			}
-	}
-
-	for _, tst := range tests {
-		testFunc(tst)
-	}
-
-	// Testing the grace period.
-	for _, duration := range []time.Duration{10 * time.Minute, 15 * time.Minute, 20 * time.Minute} {
-		evalTime := baseTime.Add(duration)
-		group.Eval(context.TODO(), evalTime)
-	}
-	testFunc(testInput{
-		restoreDuration: 25 * time.Minute,
-		alerts:          []*Alert{},
-		gracePeriod:     true,
-		num:             2,
 		})
+	}
 }
 
 func TestStaleness(t *testing.T) {

scrape/manager.go

@@ -81,6 +81,8 @@ type Options struct {
 	// Option to enable the ingestion of the created timestamp as a synthetic zero sample.
 	// See: https://github.com/prometheus/proposals/blob/main/proposals/2023-06-13_created-timestamp.md
 	EnableCreatedTimestampZeroIngestion bool
+	// Option to enable the ingestion of native histograms.
+	EnableNativeHistogramsIngestion bool
 
 	// Optional HTTP client options to use when scraping.
 	HTTPClientOptions []config_util.HTTPClientOption

scrape/scrape.go

@@ -178,6 +178,7 @@ func newScrapePool(cfg *config.ScrapeConfig, app storage.Appendable, offsetSeed
 			opts.interval,
 			opts.timeout,
 			opts.scrapeClassicHistograms,
+			options.EnableNativeHistogramsIngestion,
 			options.EnableCreatedTimestampZeroIngestion,
 			options.ExtraMetrics,
 			options.EnableMetadataStorage,
@@ -827,6 +828,9 @@ type scrapeLoop struct {
 	interval                 time.Duration
 	timeout                  time.Duration
 	scrapeClassicHistograms  bool
+
+	// Feature flagged options.
+	enableNativeHistogramIngestion bool
 	enableCTZeroIngestion          bool
 
 	appender            func(ctx context.Context) storage.Appender
@@ -1123,6 +1127,7 @@ func newScrapeLoop(ctx context.Context,
 	interval time.Duration,
 	timeout time.Duration,
 	scrapeClassicHistograms bool,
+	enableNativeHistogramIngestion bool,
 	enableCTZeroIngestion bool,
 	reportExtraMetrics bool,
 	appendMetadataToWAL bool,
@@ -1175,6 +1180,7 @@ func newScrapeLoop(ctx context.Context,
 		interval:                       interval,
 		timeout:                        timeout,
 		scrapeClassicHistograms:        scrapeClassicHistograms,
+		enableNativeHistogramIngestion: enableNativeHistogramIngestion,
 		enableCTZeroIngestion:          enableCTZeroIngestion,
 		reportExtraMetrics:             reportExtraMetrics,
 		appendMetadataToWAL:            appendMetadataToWAL,
@@ -1627,7 +1633,7 @@ loop:
 				}
 			}
 
-			if isHistogram {
+			if isHistogram && sl.enableNativeHistogramIngestion {
 				if h != nil {
 					ref, err = app.AppendHistogram(ref, lset, t, h, nil)
 				} else {

scrape/scrape_test.go

@@ -678,6 +678,7 @@ func newBasicScrapeLoop(t testing.TB, ctx context.Context, scraper scraper, app
 		false,
 		false,
 		false,
+		false,
 		nil,
 		false,
 		newTestScrapeMetrics(t),
@@ -819,6 +820,7 @@ func TestScrapeLoopRun(t *testing.T) {
 		false,
 		false,
 		false,
+		false,
 		nil,
 		false,
 		scrapeMetrics,
@@ -962,6 +964,7 @@ func TestScrapeLoopMetadata(t *testing.T) {
 		false,
 		false,
 		false,
+		false,
 		nil,
 		false,
 		scrapeMetrics,
@@ -1571,6 +1574,7 @@ func TestScrapeLoop_HistogramBucketLimit(t *testing.T) {
 	app := &bucketLimitAppender{Appender: resApp, limit: 2}
 
 	sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
+	sl.enableNativeHistogramIngestion = true
 	sl.sampleMutator = func(l labels.Labels) labels.Labels {
 		if l.Has("deleteme") {
 			return labels.EmptyLabels()
@@ -1799,6 +1803,7 @@ func TestScrapeLoopAppendExemplar(t *testing.T) {
 	tests := []struct {
 		title                           string
 		scrapeClassicHistograms         bool
+		enableNativeHistogramsIngestion bool
 		scrapeText                      string
 		contentType                     string
 		discoveryLabels                 []string
@@ -1862,6 +1867,8 @@ metric_total{n="2"} 2 # {t="2"} 2.0 20000
 		},
 		{
 			title: "Native histogram with three exemplars",
+
+			enableNativeHistogramsIngestion: true,
 			scrapeText: `name: "test_histogram"
 help: "Test histogram with many buckets removed to keep it manageable in size."
 type: HISTOGRAM
@@ -1976,6 +1983,8 @@ metric: <
 		},
 		{
 			title: "Native histogram with three exemplars scraped as classic histogram",
+
+			enableNativeHistogramsIngestion: true,
 			scrapeText: `name: "test_histogram"
 help: "Test histogram with many buckets removed to keep it manageable in size."
 type: HISTOGRAM
@@ -2115,6 +2124,7 @@ metric: <
 			}
 
 			sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
+			sl.enableNativeHistogramIngestion = test.enableNativeHistogramsIngestion
 			sl.sampleMutator = func(l labels.Labels) labels.Labels {
 				return mutateSampleLabels(l, discoveryLabels, false, nil)
 			}
@@ -3710,7 +3720,7 @@ scrape_configs:
 	s.DB.EnableNativeHistograms()
 	reg := prometheus.NewRegistry()
 
-	mng, err := NewManager(nil, nil, s, reg)
+	mng, err := NewManager(&Options{EnableNativeHistogramsIngestion: true}, nil, s, reg)
 	require.NoError(t, err)
 	cfg, err := config.Load(configStr, false, log.NewNopLogger())
 	require.NoError(t, err)

scripts/golangci-lint.yml

@@ -33,6 +33,6 @@ jobs:
         run: sudo apt-get update && sudo apt-get -y install libsnmp-dev
         if: github.repository == 'prometheus/snmp_exporter'
       - name: Lint
-        uses: golangci/golangci-lint-action@3cfe3a4abbb849e10058ce4af15d205b6da42804 # v4.0.0
+        uses: golangci/golangci-lint-action@9d1e0624a798bb64f6c3cea93db47765312263dc # v5.1.0
         with:
           version: v1.56.2

storage/remote/otlptranslator/README.md

@@ -1,22 +0,0 @@
-## Copying from opentelemetry/opentelemetry-collector-contrib
-
-This files in the `prometheus/` and `prometheusremotewrite/` are copied from the OpenTelemetry Project[^1].
-
-This is done instead of adding a go.mod dependency because OpenTelemetry depends on `prometheus/prometheus` and a cyclic dependency will be created. This is just a temporary solution and the long-term solution is to move the required packages from OpenTelemetry into `prometheus/prometheus`. 
-
-To update the dependency is a multi-step process:
-1. Vendor the latest `prometheus/prometheus`@`main` into [`opentelemetry/opentelemetry-collector-contrib`](https://github.com/open-telemetry/opentelemetry-collector-contrib)
-1. Update the VERSION in `update-copy.sh`.
-1. Run `./update-copy.sh`.
-
-### Why copy?
-
-This is because the packages we copy depend on the [`prompb`](https://github.com/prometheus/prometheus/blob/main/prompb) package. While the package is relatively stable, there are still changes. For example, https://github.com/prometheus/prometheus/pull/11935 changed the types.
-This means if we depend on the upstream packages directly, we will never able to make the changes like above. Hence we're copying the code for now.
-
-### I need to manually change these files
-
-When we do want to make changes to the types in `prompb`, we might need to edit the files directly. That is OK, please let @gouthamve or @jesusvazquez know so they can take care of updating the upstream code (by vendoring in `prometheus/prometheus` upstream and resolving conflicts) and then will run the copy
-script again to keep things updated.
-
-[^1]: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/pkg/translator/prometheus and https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/pkg/translator/prometheusremotewrite

storage/remote/otlptranslator/prometheus/normalize_label.go

@@ -1,9 +1,20 @@
-// DO NOT EDIT. COPIED AS-IS. SEE ../README.md
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheus/normalize_label.go
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
 
-// Copyright The OpenTelemetry Authors
+package prometheus
-// SPDX-License-Identifier: Apache-2.0
-
-package prometheus // import "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheus"
 
 import (
 	"strings"

storage/remote/otlptranslator/prometheus/normalize_name.go

@@ -1,9 +1,20 @@
-// DO NOT EDIT. COPIED AS-IS. SEE ../README.md
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheus/normalize_name.go
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
 
-// Copyright The OpenTelemetry Authors
+package prometheus
-// SPDX-License-Identifier: Apache-2.0
-
-package prometheus // import "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheus"
 
 import (
 	"strings"

storage/remote/otlptranslator/prometheus/unit_to_ucum.go

@@ -1,9 +1,20 @@
-// DO NOT EDIT. COPIED AS-IS. SEE ../README.md
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheus/unit_to_ucum.go
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
 
-// Copyright The OpenTelemetry Authors
+package prometheus
-// SPDX-License-Identifier: Apache-2.0
-
-package prometheus // import "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheus"
 
 import "strings"
 

storage/remote/otlptranslator/prometheusremotewrite/helper.go

@@ -1,29 +1,42 @@
-// DO NOT EDIT. COPIED AS-IS. SEE ../README.md
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheusremotewrite/helper.go
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
 
-// Copyright The OpenTelemetry Authors
+package prometheusremotewrite
-// SPDX-License-Identifier: Apache-2.0
-
-package prometheusremotewrite // import "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheusremotewrite"
 
 import (
 	"encoding/hex"
 	"fmt"
 	"log"
 	"math"
+	"slices"
 	"sort"
 	"strconv"
-	"strings"
 	"time"
 	"unicode/utf8"
 
+	"github.com/cespare/xxhash/v2"
 	"github.com/prometheus/common/model"
-	"github.com/prometheus/prometheus/model/timestamp"
-	"github.com/prometheus/prometheus/model/value"
-	"github.com/prometheus/prometheus/prompb"
 	"go.opentelemetry.io/collector/pdata/pcommon"
 	"go.opentelemetry.io/collector/pdata/pmetric"
 	conventions "go.opentelemetry.io/collector/semconv/v1.6.1"
 
+	"github.com/prometheus/prometheus/model/timestamp"
+	"github.com/prometheus/prometheus/model/value"
+	"github.com/prometheus/prometheus/prompb"
+
 	prometheustranslator "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheus"
 )
 
@@ -48,7 +61,7 @@ const (
 )
 
 type bucketBoundsData struct {
-	sig   string
+	ts    *prompb.TimeSeries
 	bound float64
 }
 
@@ -66,94 +79,47 @@ func (a ByLabelName) Len() int           { return len(a) }
 func (a ByLabelName) Less(i, j int) bool { return a[i].Name < a[j].Name }
 func (a ByLabelName) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
 
-// addSample finds a TimeSeries in tsMap that corresponds to the label set labels, and add sample to the TimeSeries; it
+// timeSeriesSignature returns a hashed label set signature.
-// creates a new TimeSeries in the map if not found and returns the time series signature.
+// The label slice should not contain duplicate label names; this method sorts the slice by label name before creating
-// tsMap will be unmodified if either labels or sample is nil, but can still be modified if the exemplar is nil.
-func addSample(tsMap map[string]*prompb.TimeSeries, sample *prompb.Sample, labels []prompb.Label,
-	datatype string) string {
-	if sample == nil || labels == nil || tsMap == nil {
-		// This shouldn't happen
-		return ""
-	}
-
-	sig := timeSeriesSignature(datatype, labels)
-	ts := tsMap[sig]
-	if ts != nil {
-		ts.Samples = append(ts.Samples, *sample)
-	} else {
-		newTs := &prompb.TimeSeries{
-			Labels:  labels,
-			Samples: []prompb.Sample{*sample},
-		}
-		tsMap[sig] = newTs
-	}
-
-	return sig
-}
-
-// addExemplars finds a bucket bound that corresponds to the exemplars value and add the exemplar to the specific sig;
-// we only add exemplars if samples are presents
-// tsMap is unmodified if either of its parameters is nil and samples are nil.
-func addExemplars(tsMap map[string]*prompb.TimeSeries, exemplars []prompb.Exemplar, bucketBoundsData []bucketBoundsData) {
-	if len(tsMap) == 0 || len(bucketBoundsData) == 0 || len(exemplars) == 0 {
-		return
-	}
-
-	sort.Sort(byBucketBoundsData(bucketBoundsData))
-
-	for _, exemplar := range exemplars {
-		addExemplar(tsMap, bucketBoundsData, exemplar)
-	}
-}
-
-func addExemplar(tsMap map[string]*prompb.TimeSeries, bucketBounds []bucketBoundsData, exemplar prompb.Exemplar) {
-	for _, bucketBound := range bucketBounds {
-		sig := bucketBound.sig
-		bound := bucketBound.bound
-
-		ts := tsMap[sig]
-		if ts != nil && len(ts.Samples) > 0 && exemplar.Value <= bound {
-			ts.Exemplars = append(ts.Exemplars, exemplar)
-			return
-		}
-	}
-}
-
-// timeSeries return a string signature in the form of:
-//
-//	TYPE-label1-value1- ...  -labelN-valueN
-//
-// the label slice should not contain duplicate label names; this method sorts the slice by label name before creating
 // the signature.
-func timeSeriesSignature(datatype string, labels []prompb.Label) string {
+// The algorithm is the same as in Prometheus' labels.StableHash function.
-	length := len(datatype)
+func timeSeriesSignature(labels []prompb.Label) uint64 {
-
-	for _, lb := range labels {
-		length += 2 + len(lb.GetName()) + len(lb.GetValue())
-	}
-
-	b := strings.Builder{}
-	b.Grow(length)
-	b.WriteString(datatype)
-
 	sort.Sort(ByLabelName(labels))
 
-	for _, lb := range labels {
+	// Use xxhash.Sum64(b) for fast path as it's faster.
-		b.WriteString("-")
+	b := make([]byte, 0, 1024)
-		b.WriteString(lb.GetName())
+	for i, v := range labels {
-		b.WriteString("-")
+		if len(b)+len(v.Name)+len(v.Value)+2 >= cap(b) {
-		b.WriteString(lb.GetValue())
+			// If labels entry is 1KB+ do not allocate whole entry.
+			h := xxhash.New()
+			_, _ = h.Write(b)
+			for _, v := range labels[i:] {
+				_, _ = h.WriteString(v.Name)
+				_, _ = h.Write(seps)
+				_, _ = h.WriteString(v.Value)
+				_, _ = h.Write(seps)
+			}
+			return h.Sum64()
 		}
 
-	return b.String()
+		b = append(b, v.Name...)
+		b = append(b, seps[0])
+		b = append(b, v.Value...)
+		b = append(b, seps[0])
+	}
+	return xxhash.Sum64(b)
 }
 
+var seps = []byte{'\xff'}
+
 // createAttributes creates a slice of Prometheus Labels with OTLP attributes and pairs of string values.
-// Unpaired string values are ignored. String pairs overwrite OTLP labels if collisions happen, and overwrites are
+// Unpaired string values are ignored. String pairs overwrite OTLP labels if collisions happen and
-// logged. Resulting label names are sanitized.
+// if logOnOverwrite is true, the overwrite is logged. Resulting label names are sanitized.
-func createAttributes(resource pcommon.Resource, attributes pcommon.Map, externalLabels map[string]string, extras ...string) []prompb.Label {
+func createAttributes(resource pcommon.Resource, attributes pcommon.Map, externalLabels map[string]string,
-	serviceName, haveServiceName := resource.Attributes().Get(conventions.AttributeServiceName)
+	ignoreAttrs []string, logOnOverwrite bool, extras ...string) []prompb.Label {
-	instance, haveInstanceID := resource.Attributes().Get(conventions.AttributeServiceInstanceID)
+	resourceAttrs := resource.Attributes()
+	serviceName, haveServiceName := resourceAttrs.Get(conventions.AttributeServiceName)
+	instance, haveInstanceID := resourceAttrs.Get(conventions.AttributeServiceInstanceID)
 
 	// Calculate the maximum possible number of labels we could return so we can preallocate l
 	maxLabelCount := attributes.Len() + len(externalLabels) + len(extras)/2
@@ -171,9 +137,13 @@ func createAttributes(resource pcommon.Resource, attributes pcommon.Map, externa
 
 	// Ensure attributes are sorted by key for consistent merging of keys which
 	// collide when sanitized.
-	labels := make([]prompb.Label, 0, attributes.Len())
+	labels := make([]prompb.Label, 0, maxLabelCount)
+	// XXX: Should we always drop service namespace/service name/service instance ID from the labels
+	// (as they get mapped to other Prometheus labels)?
 	attributes.Range(func(key string, value pcommon.Value) bool {
+		if !slices.Contains(ignoreAttrs, key) {
 			labels = append(labels, prompb.Label{Name: key, Value: value.AsString()})
+		}
 		return true
 	})
 	sort.Stable(ByLabelName(labels))
@@ -190,7 +160,7 @@ func createAttributes(resource pcommon.Resource, attributes pcommon.Map, externa
 	// Map service.name + service.namespace to job
 	if haveServiceName {
 		val := serviceName.AsString()
-		if serviceNamespace, ok := resource.Attributes().Get(conventions.AttributeServiceNamespace); ok {
+		if serviceNamespace, ok := resourceAttrs.Get(conventions.AttributeServiceNamespace); ok {
 			val = fmt.Sprintf("%s/%s", serviceNamespace.AsString(), val)
 		}
 		l[model.JobLabel] = val
@@ -213,7 +183,7 @@ func createAttributes(resource pcommon.Resource, attributes pcommon.Map, externa
 			break
 		}
 		_, found := l[extras[i]]
-		if found {
+		if found && logOnOverwrite {
 			log.Println("label " + extras[i] + " is overwritten. Check if Prometheus reserved labels are used.")
 		}
 		// internal labels should be maintained
@@ -224,12 +194,12 @@ func createAttributes(resource pcommon.Resource, attributes pcommon.Map, externa
 		l[name] = extras[i+1]
 	}
 
-	s := make([]prompb.Label, 0, len(l))
+	labels = labels[:0]
 	for k, v := range l {
-		s = append(s, prompb.Label{Name: k, Value: v})
+		labels = append(labels, prompb.Label{Name: k, Value: v})
 	}
 
-	return s
+	return labels
 }
 
 // isValidAggregationTemporality checks whether an OTel metric has a valid
@@ -249,26 +219,12 @@ func isValidAggregationTemporality(metric pmetric.Metric) bool {
 	return false
 }
 
-// addSingleHistogramDataPoint converts pt to 2 + min(len(ExplicitBounds), len(BucketCount)) + 1 samples. It
+func (c *PrometheusConverter) addHistogramDataPoints(dataPoints pmetric.HistogramDataPointSlice,
-// ignore extra buckets if len(ExplicitBounds) > len(BucketCounts)
+	resource pcommon.Resource, settings Settings, baseName string) {
-func addSingleHistogramDataPoint(pt pmetric.HistogramDataPoint, resource pcommon.Resource, metric pmetric.Metric, settings Settings, tsMap map[string]*prompb.TimeSeries, baseName string) {
+	for x := 0; x < dataPoints.Len(); x++ {
+		pt := dataPoints.At(x)
 		timestamp := convertTimeStamp(pt.Timestamp())
-	baseLabels := createAttributes(resource, pt.Attributes(), settings.ExternalLabels)
+		baseLabels := createAttributes(resource, pt.Attributes(), settings.ExternalLabels, nil, false)
-
-	createLabels := func(nameSuffix string, extras ...string) []prompb.Label {
-		extraLabelCount := len(extras) / 2
-		labels := make([]prompb.Label, len(baseLabels), len(baseLabels)+extraLabelCount+1) // +1 for name
-		copy(labels, baseLabels)
-
-		for extrasIdx := 0; extrasIdx < extraLabelCount; extrasIdx++ {
-			labels = append(labels, prompb.Label{Name: extras[extrasIdx], Value: extras[extrasIdx+1]})
-		}
-
-		// sum, count, and buckets of the histogram should append suffix to baseName
-		labels = append(labels, prompb.Label{Name: model.MetricNameLabel, Value: baseName + nameSuffix})
-
-		return labels
-	}
 
 		// If the sum is unset, it indicates the _sum metric point should be
 		// omitted
@@ -282,8 +238,8 @@ func addSingleHistogramDataPoint(pt pmetric.HistogramDataPoint, resource pcommon
 				sum.Value = math.Float64frombits(value.StaleNaN)
 			}
 
-		sumlabels := createLabels(sumStr)
+			sumlabels := createLabels(baseName+sumStr, baseLabels)
-		addSample(tsMap, sum, sumlabels, metric.Type().String())
+			c.addSample(sum, sumlabels)
 
 		}
 
@@ -296,14 +252,12 @@ func addSingleHistogramDataPoint(pt pmetric.HistogramDataPoint, resource pcommon
 			count.Value = math.Float64frombits(value.StaleNaN)
 		}
 
-	countlabels := createLabels(countStr)
+		countlabels := createLabels(baseName+countStr, baseLabels)
-	addSample(tsMap, count, countlabels, metric.Type().String())
+		c.addSample(count, countlabels)
 
 		// cumulative count for conversion to cumulative histogram
 		var cumulativeCount uint64
 
-	promExemplars := getPromExemplars[pmetric.HistogramDataPoint](pt)
-
 		var bucketBounds []bucketBoundsData
 
 		// process each bound, based on histograms proto definition, # of buckets = # of explicit bounds + 1
@@ -318,10 +272,10 @@ func addSingleHistogramDataPoint(pt pmetric.HistogramDataPoint, resource pcommon
 				bucket.Value = math.Float64frombits(value.StaleNaN)
 			}
 			boundStr := strconv.FormatFloat(bound, 'f', -1, 64)
-		labels := createLabels(bucketStr, leStr, boundStr)
+			labels := createLabels(baseName+bucketStr, baseLabels, leStr, boundStr)
-		sig := addSample(tsMap, bucket, labels, metric.Type().String())
+			ts := c.addSample(bucket, labels)
 
-		bucketBounds = append(bucketBounds, bucketBoundsData{sig: sig, bound: bound})
+			bucketBounds = append(bucketBounds, bucketBoundsData{ts: ts, bound: bound})
 		}
 		// add le=+Inf bucket
 		infBucket := &prompb.Sample{
@@ -332,17 +286,17 @@ func addSingleHistogramDataPoint(pt pmetric.HistogramDataPoint, resource pcommon
 		} else {
 			infBucket.Value = float64(pt.Count())
 		}
-	infLabels := createLabels(bucketStr, leStr, pInfStr)
+		infLabels := createLabels(baseName+bucketStr, baseLabels, leStr, pInfStr)
-	sig := addSample(tsMap, infBucket, infLabels, metric.Type().String())
+		ts := c.addSample(infBucket, infLabels)
 
-	bucketBounds = append(bucketBounds, bucketBoundsData{sig: sig, bound: math.Inf(1)})
+		bucketBounds = append(bucketBounds, bucketBoundsData{ts: ts, bound: math.Inf(1)})
-	addExemplars(tsMap, promExemplars, bucketBounds)
+		c.addExemplars(pt, bucketBounds)
 
-	// add _created time series if needed
 		startTimestamp := pt.StartTimestamp()
 		if settings.ExportCreatedMetric && startTimestamp != 0 {
-		labels := createLabels(createdSuffix)
+			labels := createLabels(baseName+createdSuffix, baseLabels)
-		addCreatedTimeSeriesIfNeeded(tsMap, labels, startTimestamp, pt.Timestamp(), metric.Type().String())
+			c.addTimeSeriesIfNeeded(labels, startTimestamp, pt.Timestamp())
+		}
 	}
 }
 
@@ -415,58 +369,38 @@ func mostRecentTimestampInMetric(metric pmetric.Metric) pcommon.Timestamp {
 	case pmetric.MetricTypeGauge:
 		dataPoints := metric.Gauge().DataPoints()
 		for x := 0; x < dataPoints.Len(); x++ {
-			ts = maxTimestamp(ts, dataPoints.At(x).Timestamp())
+			ts = max(ts, dataPoints.At(x).Timestamp())
 		}
 	case pmetric.MetricTypeSum:
 		dataPoints := metric.Sum().DataPoints()
 		for x := 0; x < dataPoints.Len(); x++ {
-			ts = maxTimestamp(ts, dataPoints.At(x).Timestamp())
+			ts = max(ts, dataPoints.At(x).Timestamp())
 		}
 	case pmetric.MetricTypeHistogram:
 		dataPoints := metric.Histogram().DataPoints()
 		for x := 0; x < dataPoints.Len(); x++ {
-			ts = maxTimestamp(ts, dataPoints.At(x).Timestamp())
+			ts = max(ts, dataPoints.At(x).Timestamp())
 		}
 	case pmetric.MetricTypeExponentialHistogram:
 		dataPoints := metric.ExponentialHistogram().DataPoints()
 		for x := 0; x < dataPoints.Len(); x++ {
-			ts = maxTimestamp(ts, dataPoints.At(x).Timestamp())
+			ts = max(ts, dataPoints.At(x).Timestamp())
 		}
 	case pmetric.MetricTypeSummary:
 		dataPoints := metric.Summary().DataPoints()
 		for x := 0; x < dataPoints.Len(); x++ {
-			ts = maxTimestamp(ts, dataPoints.At(x).Timestamp())
+			ts = max(ts, dataPoints.At(x).Timestamp())
 		}
 	}
 	return ts
 }
 
-func maxTimestamp(a, b pcommon.Timestamp) pcommon.Timestamp {
+func (c *PrometheusConverter) addSummaryDataPoints(dataPoints pmetric.SummaryDataPointSlice, resource pcommon.Resource,
-	if a > b {
+	settings Settings, baseName string) {
-		return a
+	for x := 0; x < dataPoints.Len(); x++ {
-	}
+		pt := dataPoints.At(x)
-	return b
-}
-
-// addSingleSummaryDataPoint converts pt to len(QuantileValues) + 2 samples.
-func addSingleSummaryDataPoint(pt pmetric.SummaryDataPoint, resource pcommon.Resource, metric pmetric.Metric, settings Settings,
-	tsMap map[string]*prompb.TimeSeries, baseName string) {
 		timestamp := convertTimeStamp(pt.Timestamp())
-	baseLabels := createAttributes(resource, pt.Attributes(), settings.ExternalLabels)
+		baseLabels := createAttributes(resource, pt.Attributes(), settings.ExternalLabels, nil, false)
-
-	createLabels := func(name string, extras ...string) []prompb.Label {
-		extraLabelCount := len(extras) / 2
-		labels := make([]prompb.Label, len(baseLabels), len(baseLabels)+extraLabelCount+1) // +1 for name
-		copy(labels, baseLabels)
-
-		for extrasIdx := 0; extrasIdx < extraLabelCount; extrasIdx++ {
-			labels = append(labels, prompb.Label{Name: extras[extrasIdx], Value: extras[extrasIdx+1]})
-		}
-
-		labels = append(labels, prompb.Label{Name: model.MetricNameLabel, Value: name})
-
-		return labels
-	}
 
 		// treat sum as a sample in an individual TimeSeries
 		sum := &prompb.Sample{
@@ -477,8 +411,8 @@ func addSingleSummaryDataPoint(pt pmetric.SummaryDataPoint, resource pcommon.Res
 			sum.Value = math.Float64frombits(value.StaleNaN)
 		}
 		// sum and count of the summary should append suffix to baseName
-	sumlabels := createLabels(baseName + sumStr)
+		sumlabels := createLabels(baseName+sumStr, baseLabels)
-	addSample(tsMap, sum, sumlabels, metric.Type().String())
+		c.addSample(sum, sumlabels)
 
 		// treat count as a sample in an individual TimeSeries
 		count := &prompb.Sample{
@@ -488,8 +422,8 @@ func addSingleSummaryDataPoint(pt pmetric.SummaryDataPoint, resource pcommon.Res
 		if pt.Flags().NoRecordedValue() {
 			count.Value = math.Float64frombits(value.StaleNaN)
 		}
-	countlabels := createLabels(baseName + countStr)
+		countlabels := createLabels(baseName+countStr, baseLabels)
-	addSample(tsMap, count, countlabels, metric.Type().String())
+		c.addSample(count, countlabels)
 
 		// process each percentile/quantile
 		for i := 0; i < pt.QuantileValues().Len(); i++ {
@@ -502,75 +436,136 @@ func addSingleSummaryDataPoint(pt pmetric.SummaryDataPoint, resource pcommon.Res
 				quantile.Value = math.Float64frombits(value.StaleNaN)
 			}
 			percentileStr := strconv.FormatFloat(qt.Quantile(), 'f', -1, 64)
-		qtlabels := createLabels(baseName, quantileStr, percentileStr)
+			qtlabels := createLabels(baseName, baseLabels, quantileStr, percentileStr)
-		addSample(tsMap, quantile, qtlabels, metric.Type().String())
+			c.addSample(quantile, qtlabels)
 		}
 
-	// add _created time series if needed
 		startTimestamp := pt.StartTimestamp()
 		if settings.ExportCreatedMetric && startTimestamp != 0 {
-		createdLabels := createLabels(baseName + createdSuffix)
+			createdLabels := createLabels(baseName+createdSuffix, baseLabels)
-		addCreatedTimeSeriesIfNeeded(tsMap, createdLabels, startTimestamp, pt.Timestamp(), metric.Type().String())
+			c.addTimeSeriesIfNeeded(createdLabels, startTimestamp, pt.Timestamp())
+		}
 	}
 }
 
-// addCreatedTimeSeriesIfNeeded adds {name}_created time series with a single
+// createLabels returns a copy of baseLabels, adding to it the pair model.MetricNameLabel=name.
-// sample. If the series exists, then new samples won't be added.
+// If extras are provided, corresponding label pairs are also added to the returned slice.
-func addCreatedTimeSeriesIfNeeded(
+// If extras is uneven length, the last (unpaired) extra will be ignored.
-	series map[string]*prompb.TimeSeries,
+func createLabels(name string, baseLabels []prompb.Label, extras ...string) []prompb.Label {
-	labels []prompb.Label,
+	extraLabelCount := len(extras) / 2
-	startTimestamp pcommon.Timestamp,
+	labels := make([]prompb.Label, len(baseLabels), len(baseLabels)+extraLabelCount+1) // +1 for name
-	timestamp pcommon.Timestamp,
+	copy(labels, baseLabels)
-	metricType string,
+
-) {
+	n := len(extras)
-	sig := timeSeriesSignature(metricType, labels)
+	n -= n % 2
-	if _, ok := series[sig]; !ok {
+	for extrasIdx := 0; extrasIdx < n; extrasIdx += 2 {
-		series[sig] = &prompb.TimeSeries{
+		labels = append(labels, prompb.Label{Name: extras[extrasIdx], Value: extras[extrasIdx+1]})
-			Labels: labels,
+	}
-			Samples: []prompb.Sample{
+
-				{ // convert ns to ms
+	labels = append(labels, prompb.Label{Name: model.MetricNameLabel, Value: name})
+	return labels
+}
+
+// getOrCreateTimeSeries returns the time series corresponding to the label set if existent, and false.
+// Otherwise it creates a new one and returns that, and true.
+func (c *PrometheusConverter) getOrCreateTimeSeries(lbls []prompb.Label) (*prompb.TimeSeries, bool) {
+	h := timeSeriesSignature(lbls)
+	ts := c.unique[h]
+	if ts != nil {
+		if isSameMetric(ts, lbls) {
+			// We already have this metric
+			return ts, false
+		}
+
+		// Look for a matching conflict
+		for _, cTS := range c.conflicts[h] {
+			if isSameMetric(cTS, lbls) {
+				// We already have this metric
+				return cTS, false
+			}
+		}
+
+		// New conflict
+		ts = &prompb.TimeSeries{
+			Labels: lbls,
+		}
+		c.conflicts[h] = append(c.conflicts[h], ts)
+		return ts, true
+	}
+
+	// This metric is new
+	ts = &prompb.TimeSeries{
+		Labels: lbls,
+	}
+	c.unique[h] = ts
+	return ts, true
+}
+
+// addTimeSeriesIfNeeded adds a corresponding time series if it doesn't already exist.
+// If the time series doesn't already exist, it gets added with startTimestamp for its value and timestamp for its timestamp,
+// both converted to milliseconds.
+func (c *PrometheusConverter) addTimeSeriesIfNeeded(lbls []prompb.Label, startTimestamp pcommon.Timestamp, timestamp pcommon.Timestamp) {
+	ts, created := c.getOrCreateTimeSeries(lbls)
+	if created {
+		ts.Samples = []prompb.Sample{
+			{
+				// convert ns to ms
 				Value:     float64(convertTimeStamp(startTimestamp)),
 				Timestamp: convertTimeStamp(timestamp),
 			},
-			},
 		}
 	}
 }
 
-// addResourceTargetInfo converts the resource to the target info metric
+// addResourceTargetInfo converts the resource to the target info metric.
-func addResourceTargetInfo(resource pcommon.Resource, settings Settings, timestamp pcommon.Timestamp, tsMap map[string]*prompb.TimeSeries) {
+func addResourceTargetInfo(resource pcommon.Resource, settings Settings, timestamp pcommon.Timestamp, converter *PrometheusConverter) {
-	if settings.DisableTargetInfo {
+	if settings.DisableTargetInfo || timestamp == 0 {
 		return
 	}
-	// Use resource attributes (other than those used for job+instance) as the
+
-	// metric labels for the target info metric
+	attributes := resource.Attributes()
-	attributes := pcommon.NewMap()
+	identifyingAttrs := []string{
-	resource.Attributes().CopyTo(attributes)
+		conventions.AttributeServiceNamespace,
-	attributes.RemoveIf(func(k string, _ pcommon.Value) bool {
+		conventions.AttributeServiceName,
-		switch k {
+		conventions.AttributeServiceInstanceID,
-		case conventions.AttributeServiceName, conventions.AttributeServiceNamespace, conventions.AttributeServiceInstanceID:
-			// Remove resource attributes used for job + instance
-			return true
-		default:
-			return false
 	}
-	})
+	nonIdentifyingAttrsCount := attributes.Len()
-	if attributes.Len() == 0 {
+	for _, a := range identifyingAttrs {
+		_, haveAttr := attributes.Get(a)
+		if haveAttr {
+			nonIdentifyingAttrsCount--
+		}
+	}
+	if nonIdentifyingAttrsCount == 0 {
 		// If we only have job + instance, then target_info isn't useful, so don't add it.
 		return
 	}
-	// create parameters for addSample
+
 	name := targetMetricName
 	if len(settings.Namespace) > 0 {
 		name = settings.Namespace + "_" + name
 	}
-	labels := createAttributes(resource, attributes, settings.ExternalLabels, model.MetricNameLabel, name)
+
+	labels := createAttributes(resource, attributes, settings.ExternalLabels, identifyingAttrs, false, model.MetricNameLabel, name)
+	haveIdentifier := false
+	for _, l := range labels {
+		if l.Name == model.JobLabel || l.Name == model.InstanceLabel {
+			haveIdentifier = true
+			break
+		}
+	}
+
+	if !haveIdentifier {
+		// We need at least one identifying label to generate target_info.
+		return
+	}
+
 	sample := &prompb.Sample{
 		Value: float64(1),
 		// convert ns to ms
 		Timestamp: convertTimeStamp(timestamp),
 	}
-	addSample(tsMap, sample, labels, infoType)
+	converter.addSample(sample, labels)
 }
 
 // convertTimeStamp converts OTLP timestamp in ns to timestamp in ms

storage/remote/otlptranslator/prometheusremotewrite/histograms.go

@@ -1,49 +1,49 @@
-// DO NOT EDIT. COPIED AS-IS. SEE ../README.md
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheusremotewrite/histograms.go
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
 
-// Copyright The OpenTelemetry Authors
+package prometheusremotewrite
-// SPDX-License-Identifier: Apache-2.0
-
-package prometheusremotewrite // import "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheusremotewrite"
 
 import (
 	"fmt"
 	"math"
 
 	"github.com/prometheus/common/model"
-	"github.com/prometheus/prometheus/model/value"
-	"github.com/prometheus/prometheus/prompb"
 	"go.opentelemetry.io/collector/pdata/pcommon"
 	"go.opentelemetry.io/collector/pdata/pmetric"
+
+	"github.com/prometheus/prometheus/model/value"
+	"github.com/prometheus/prometheus/prompb"
 )
 
 const defaultZeroThreshold = 1e-128
 
-func addSingleExponentialHistogramDataPoint(
+func (c *PrometheusConverter) addExponentialHistogramDataPoints(dataPoints pmetric.ExponentialHistogramDataPointSlice,
-	metric string,
+	resource pcommon.Resource, settings Settings, baseName string) error {
-	pt pmetric.ExponentialHistogramDataPoint,
+	for x := 0; x < dataPoints.Len(); x++ {
-	resource pcommon.Resource,
+		pt := dataPoints.At(x)
-	settings Settings,
+		lbls := createAttributes(
-	series map[string]*prompb.TimeSeries,
-) error {
-	labels := createAttributes(
 			resource,
 			pt.Attributes(),
 			settings.ExternalLabels,
+			nil,
+			true,
 			model.MetricNameLabel,
-		metric,
+			baseName,
 		)
-
+		ts, _ := c.getOrCreateTimeSeries(lbls)
-	sig := timeSeriesSignature(
-		pmetric.MetricTypeExponentialHistogram.String(),
-		labels,
-	)
-	ts, ok := series[sig]
-	if !ok {
-		ts = &prompb.TimeSeries{
-			Labels: labels,
-		}
-		series[sig] = ts
-	}
 
 		histogram, err := exponentialToNativeHistogram(pt)
 		if err != nil {
@@ -53,6 +53,7 @@ func addSingleExponentialHistogramDataPoint(
 
 		exemplars := getPromExemplars[pmetric.ExponentialHistogramDataPoint](pt)
 		ts.Exemplars = append(ts.Exemplars, exemplars...)
+	}
 
 	return nil
 }

storage/remote/otlptranslator/prometheusremotewrite/metrics_to_prw.go

@@ -1,19 +1,31 @@
-// DO NOT EDIT. COPIED AS-IS. SEE ../README.md
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheusremotewrite/metrics_to_prw.go
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
 
-// Copyright The OpenTelemetry Authors
+package prometheusremotewrite
-// SPDX-License-Identifier: Apache-2.0
-
-package prometheusremotewrite // import "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheusremotewrite"
 
 import (
 	"errors"
 	"fmt"
+	"sort"
 
-	"github.com/prometheus/prometheus/prompb"
 	"go.opentelemetry.io/collector/pdata/pcommon"
 	"go.opentelemetry.io/collector/pdata/pmetric"
 	"go.uber.org/multierr"
 
+	"github.com/prometheus/prometheus/prompb"
 	prometheustranslator "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheus"
 )
 
@@ -26,10 +38,21 @@ type Settings struct {
 	SendMetadata        bool
 }
 
-// FromMetrics converts pmetric.Metrics to Prometheus remote write format.
+// PrometheusConverter converts from OTel write format to Prometheus write format.
-func FromMetrics(md pmetric.Metrics, settings Settings) (tsMap map[string]*prompb.TimeSeries, errs error) {
+type PrometheusConverter struct {
-	tsMap = make(map[string]*prompb.TimeSeries)
+	unique    map[uint64]*prompb.TimeSeries
+	conflicts map[uint64][]*prompb.TimeSeries
+}
 
+func NewPrometheusConverter() *PrometheusConverter {
+	return &PrometheusConverter{
+		unique:    map[uint64]*prompb.TimeSeries{},
+		conflicts: map[uint64][]*prompb.TimeSeries{},
+	}
+}
+
+// FromMetrics converts pmetric.Metrics to Prometheus remote write format.
+func (c *PrometheusConverter) FromMetrics(md pmetric.Metrics, settings Settings) (errs error) {
 	resourceMetricsSlice := md.ResourceMetrics()
 	for i := 0; i < resourceMetricsSlice.Len(); i++ {
 		resourceMetrics := resourceMetricsSlice.At(i)
@@ -39,13 +62,12 @@ func FromMetrics(md pmetric.Metrics, settings Settings) (tsMap map[string]*promp
 		// use with the "target" info metric
 		var mostRecentTimestamp pcommon.Timestamp
 		for j := 0; j < scopeMetricsSlice.Len(); j++ {
-			scopeMetrics := scopeMetricsSlice.At(j)
+			metricSlice := scopeMetricsSlice.At(j).Metrics()
-			metricSlice := scopeMetrics.Metrics()
 
 			// TODO: decide if instrumentation library information should be exported as labels
 			for k := 0; k < metricSlice.Len(); k++ {
 				metric := metricSlice.At(k)
-				mostRecentTimestamp = maxTimestamp(mostRecentTimestamp, mostRecentTimestampInMetric(metric))
+				mostRecentTimestamp = max(mostRecentTimestamp, mostRecentTimestampInMetric(metric))
 
 				if !isValidAggregationTemporality(metric) {
 					errs = multierr.Append(errs, fmt.Errorf("invalid temporality and type combination for metric %q", metric.Name()))
@@ -54,65 +76,125 @@ func FromMetrics(md pmetric.Metrics, settings Settings) (tsMap map[string]*promp
 
 				promName := prometheustranslator.BuildCompliantName(metric, settings.Namespace, settings.AddMetricSuffixes)
 
-				// handle individual metric based on type
+				// handle individual metrics based on type
 				//exhaustive:enforce
 				switch metric.Type() {
 				case pmetric.MetricTypeGauge:
 					dataPoints := metric.Gauge().DataPoints()
 					if dataPoints.Len() == 0 {
 						errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name()))
+						break
 					}
-					for x := 0; x < dataPoints.Len(); x++ {
+					c.addGaugeNumberDataPoints(dataPoints, resource, settings, promName)
-						addSingleGaugeNumberDataPoint(dataPoints.At(x), resource, metric, settings, tsMap, promName)
-					}
 				case pmetric.MetricTypeSum:
 					dataPoints := metric.Sum().DataPoints()
 					if dataPoints.Len() == 0 {
 						errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name()))
+						break
 					}
-					for x := 0; x < dataPoints.Len(); x++ {
+					c.addSumNumberDataPoints(dataPoints, resource, metric, settings, promName)
-						addSingleSumNumberDataPoint(dataPoints.At(x), resource, metric, settings, tsMap, promName)
-					}
 				case pmetric.MetricTypeHistogram:
 					dataPoints := metric.Histogram().DataPoints()
 					if dataPoints.Len() == 0 {
 						errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name()))
+						break
 					}
-					for x := 0; x < dataPoints.Len(); x++ {
+					c.addHistogramDataPoints(dataPoints, resource, settings, promName)
-						addSingleHistogramDataPoint(dataPoints.At(x), resource, metric, settings, tsMap, promName)
-					}
 				case pmetric.MetricTypeExponentialHistogram:
 					dataPoints := metric.ExponentialHistogram().DataPoints()
 					if dataPoints.Len() == 0 {
 						errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name()))
+						break
 					}
-					for x := 0; x < dataPoints.Len(); x++ {
+					errs = multierr.Append(errs, c.addExponentialHistogramDataPoints(
-						errs = multierr.Append(
+						dataPoints,
-							errs,
-							addSingleExponentialHistogramDataPoint(
-								promName,
-								dataPoints.At(x),
 						resource,
 						settings,
-								tsMap,
+						promName,
-							),
+					))
-						)
-					}
 				case pmetric.MetricTypeSummary:
 					dataPoints := metric.Summary().DataPoints()
 					if dataPoints.Len() == 0 {
 						errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name()))
+						break
 					}
-					for x := 0; x < dataPoints.Len(); x++ {
+					c.addSummaryDataPoints(dataPoints, resource, settings, promName)
-						addSingleSummaryDataPoint(dataPoints.At(x), resource, metric, settings, tsMap, promName)
-					}
 				default:
 					errs = multierr.Append(errs, errors.New("unsupported metric type"))
 				}
 			}
 		}
-		addResourceTargetInfo(resource, settings, mostRecentTimestamp, tsMap)
+		addResourceTargetInfo(resource, settings, mostRecentTimestamp, c)
 	}
 
 	return
 }
+
+// TimeSeries returns a slice of the prompb.TimeSeries that were converted from OTel format.
+func (c *PrometheusConverter) TimeSeries() []prompb.TimeSeries {
+	conflicts := 0
+	for _, ts := range c.conflicts {
+		conflicts += len(ts)
+	}
+	allTS := make([]prompb.TimeSeries, 0, len(c.unique)+conflicts)
+	for _, ts := range c.unique {
+		allTS = append(allTS, *ts)
+	}
+	for _, cTS := range c.conflicts {
+		for _, ts := range cTS {
+			allTS = append(allTS, *ts)
+		}
+	}
+
+	return allTS
+}
+
+func isSameMetric(ts *prompb.TimeSeries, lbls []prompb.Label) bool {
+	if len(ts.Labels) != len(lbls) {
+		return false
+	}
+	for i, l := range ts.Labels {
+		if l.Name != ts.Labels[i].Name || l.Value != ts.Labels[i].Value {
+			return false
+		}
+	}
+	return true
+}
+
+// addExemplars adds exemplars for the dataPoint. For each exemplar, if it can find a bucket bound corresponding to its value,
+// the exemplar is added to the bucket bound's time series, provided that the time series' has samples.
+func (c *PrometheusConverter) addExemplars(dataPoint pmetric.HistogramDataPoint, bucketBounds []bucketBoundsData) {
+	if len(bucketBounds) == 0 {
+		return
+	}
+
+	exemplars := getPromExemplars(dataPoint)
+	if len(exemplars) == 0 {
+		return
+	}
+
+	sort.Sort(byBucketBoundsData(bucketBounds))
+	for _, exemplar := range exemplars {
+		for _, bound := range bucketBounds {
+			if len(bound.ts.Samples) > 0 && exemplar.Value <= bound.bound {
+				bound.ts.Exemplars = append(bound.ts.Exemplars, exemplar)
+				break
+			}
+		}
+	}
+}
+
+// addSample finds a TimeSeries that corresponds to lbls, and adds sample to it.
+// If there is no corresponding TimeSeries already, it's created.
+// The corresponding TimeSeries is returned.
+// If either lbls is nil/empty or sample is nil, nothing is done.
+func (c *PrometheusConverter) addSample(sample *prompb.Sample, lbls []prompb.Label) *prompb.TimeSeries {
+	if sample == nil || len(lbls) == 0 {
+		// This shouldn't happen
+		return nil
+	}
+
+	ts, _ := c.getOrCreateTimeSeries(lbls)
+	ts.Samples = append(ts.Samples, *sample)
+	return ts
+}

storage/remote/otlptranslator/prometheusremotewrite/metrics_to_prw_test.go

@@ -0,0 +1,134 @@
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheusremotewrite/metrics_to_prw_test.go
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
+
+package prometheusremotewrite
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+	"go.opentelemetry.io/collector/pdata/pcommon"
+	"go.opentelemetry.io/collector/pdata/pmetric"
+	"go.opentelemetry.io/collector/pdata/pmetric/pmetricotlp"
+)
+
+func BenchmarkPrometheusConverter_FromMetrics(b *testing.B) {
+	for _, resourceAttributeCount := range []int{0, 5, 50} {
+		b.Run(fmt.Sprintf("resource attribute count: %v", resourceAttributeCount), func(b *testing.B) {
+			for _, histogramCount := range []int{0, 1000} {
+				b.Run(fmt.Sprintf("histogram count: %v", histogramCount), func(b *testing.B) {
+					nonHistogramCounts := []int{0, 1000}
+
+					if resourceAttributeCount == 0 && histogramCount == 0 {
+						// Don't bother running a scenario where we'll generate no series.
+						nonHistogramCounts = []int{1000}
+					}
+
+					for _, nonHistogramCount := range nonHistogramCounts {
+						b.Run(fmt.Sprintf("non-histogram count: %v", nonHistogramCount), func(b *testing.B) {
+							for _, labelsPerMetric := range []int{2, 20} {
+								b.Run(fmt.Sprintf("labels per metric: %v", labelsPerMetric), func(b *testing.B) {
+									for _, exemplarsPerSeries := range []int{0, 5, 10} {
+										b.Run(fmt.Sprintf("exemplars per series: %v", exemplarsPerSeries), func(b *testing.B) {
+											payload := createExportRequest(resourceAttributeCount, histogramCount, nonHistogramCount, labelsPerMetric, exemplarsPerSeries)
+
+											for i := 0; i < b.N; i++ {
+												converter := NewPrometheusConverter()
+												require.NoError(b, converter.FromMetrics(payload.Metrics(), Settings{}))
+												require.NotNil(b, converter.TimeSeries())
+											}
+										})
+									}
+								})
+							}
+						})
+					}
+				})
+			}
+		})
+	}
+}
+
+func createExportRequest(resourceAttributeCount int, histogramCount int, nonHistogramCount int, labelsPerMetric int, exemplarsPerSeries int) pmetricotlp.ExportRequest {
+	request := pmetricotlp.NewExportRequest()
+
+	rm := request.Metrics().ResourceMetrics().AppendEmpty()
+	generateAttributes(rm.Resource().Attributes(), "resource", resourceAttributeCount)
+
+	metrics := rm.ScopeMetrics().AppendEmpty().Metrics()
+	ts := pcommon.NewTimestampFromTime(time.Now())
+
+	for i := 1; i <= histogramCount; i++ {
+		m := metrics.AppendEmpty()
+		m.SetEmptyHistogram()
+		m.SetName(fmt.Sprintf("histogram-%v", i))
+		m.Histogram().SetAggregationTemporality(pmetric.AggregationTemporalityCumulative)
+		h := m.Histogram().DataPoints().AppendEmpty()
+		h.SetTimestamp(ts)
+
+		// Set 50 samples, 10 each with values 0.5, 1, 2, 4, and 8
+		h.SetCount(50)
+		h.SetSum(155)
+		h.BucketCounts().FromRaw([]uint64{10, 10, 10, 10, 10, 0})
+		h.ExplicitBounds().FromRaw([]float64{.5, 1, 2, 4, 8, 16}) // Bucket boundaries include the upper limit (ie. each sample is on the upper limit of its bucket)
+
+		generateAttributes(h.Attributes(), "series", labelsPerMetric)
+		generateExemplars(h.Exemplars(), exemplarsPerSeries, ts)
+	}
+
+	for i := 1; i <= nonHistogramCount; i++ {
+		m := metrics.AppendEmpty()
+		m.SetEmptySum()
+		m.SetName(fmt.Sprintf("sum-%v", i))
+		m.Sum().SetAggregationTemporality(pmetric.AggregationTemporalityCumulative)
+		point := m.Sum().DataPoints().AppendEmpty()
+		point.SetTimestamp(ts)
+		point.SetDoubleValue(1.23)
+		generateAttributes(point.Attributes(), "series", labelsPerMetric)
+		generateExemplars(point.Exemplars(), exemplarsPerSeries, ts)
+	}
+
+	for i := 1; i <= nonHistogramCount; i++ {
+		m := metrics.AppendEmpty()
+		m.SetEmptyGauge()
+		m.SetName(fmt.Sprintf("gauge-%v", i))
+		point := m.Gauge().DataPoints().AppendEmpty()
+		point.SetTimestamp(ts)
+		point.SetDoubleValue(1.23)
+		generateAttributes(point.Attributes(), "series", labelsPerMetric)
+		generateExemplars(point.Exemplars(), exemplarsPerSeries, ts)
+	}
+
+	return request
+}
+
+func generateAttributes(m pcommon.Map, prefix string, count int) {
+	for i := 1; i <= count; i++ {
+		m.PutStr(fmt.Sprintf("%v-name-%v", prefix, i), fmt.Sprintf("value-%v", i))
+	}
+}
+
+func generateExemplars(exemplars pmetric.ExemplarSlice, count int, ts pcommon.Timestamp) {
+	for i := 1; i <= count; i++ {
+		e := exemplars.AppendEmpty()
+		e.SetTimestamp(ts)
+		e.SetDoubleValue(2.22)
+		e.SetSpanID(pcommon.SpanID{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08})
+		e.SetTraceID(pcommon.TraceID{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f})
+	}
+}

storage/remote/otlptranslator/prometheusremotewrite/number_data_points.go

@@ -1,35 +1,42 @@
-// DO NOT EDIT. COPIED AS-IS. SEE ../README.md
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheusremotewrite/number_data_points.go
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
 
-// Copyright The OpenTelemetry Authors
+package prometheusremotewrite
-// SPDX-License-Identifier: Apache-2.0
-
-package prometheusremotewrite // import "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheusremotewrite"
 
 import (
 	"math"
 
 	"github.com/prometheus/common/model"
-	"github.com/prometheus/prometheus/model/value"
-	"github.com/prometheus/prometheus/prompb"
 	"go.opentelemetry.io/collector/pdata/pcommon"
 	"go.opentelemetry.io/collector/pdata/pmetric"
+
+	"github.com/prometheus/prometheus/model/value"
+	"github.com/prometheus/prometheus/prompb"
 )
 
-// addSingleGaugeNumberDataPoint converts the Gauge metric data point to a
+func (c *PrometheusConverter) addGaugeNumberDataPoints(dataPoints pmetric.NumberDataPointSlice,
-// Prometheus time series with samples and labels. The result is stored in the
+	resource pcommon.Resource, settings Settings, name string) {
-// series map.
+	for x := 0; x < dataPoints.Len(); x++ {
-func addSingleGaugeNumberDataPoint(
+		pt := dataPoints.At(x)
-	pt pmetric.NumberDataPoint,
-	resource pcommon.Resource,
-	metric pmetric.Metric,
-	settings Settings,
-	series map[string]*prompb.TimeSeries,
-	name string,
-) {
 		labels := createAttributes(
 			resource,
 			pt.Attributes(),
 			settings.ExternalLabels,
+			nil,
+			true,
 			model.MetricNameLabel,
 			name,
 		)
@@ -46,25 +53,22 @@ func addSingleGaugeNumberDataPoint(
 		if pt.Flags().NoRecordedValue() {
 			sample.Value = math.Float64frombits(value.StaleNaN)
 		}
-	addSample(series, sample, labels, metric.Type().String())
+		c.addSample(sample, labels)
+	}
 }
 
-// addSingleSumNumberDataPoint converts the Sum metric data point to a Prometheus
+func (c *PrometheusConverter) addSumNumberDataPoints(dataPoints pmetric.NumberDataPointSlice,
-// time series with samples, labels and exemplars. The result is stored in the
+	resource pcommon.Resource, metric pmetric.Metric, settings Settings, name string) {
-// series map.
+	for x := 0; x < dataPoints.Len(); x++ {
-func addSingleSumNumberDataPoint(
+		pt := dataPoints.At(x)
-	pt pmetric.NumberDataPoint,
+		lbls := createAttributes(
-	resource pcommon.Resource,
-	metric pmetric.Metric,
-	settings Settings,
-	series map[string]*prompb.TimeSeries,
-	name string,
-) {
-	labels := createAttributes(
 			resource,
 			pt.Attributes(),
 			settings.ExternalLabels,
-		model.MetricNameLabel, name,
+			nil,
+			true,
+			model.MetricNameLabel,
+			name,
 		)
 		sample := &prompb.Sample{
 			// convert ns to ms
@@ -79,28 +83,28 @@ func addSingleSumNumberDataPoint(
 		if pt.Flags().NoRecordedValue() {
 			sample.Value = math.Float64frombits(value.StaleNaN)
 		}
-	sig := addSample(series, sample, labels, metric.Type().String())
+		ts := c.addSample(sample, lbls)
-
+		if ts != nil {
-	if ts := series[sig]; sig != "" && ts != nil {
 			exemplars := getPromExemplars[pmetric.NumberDataPoint](pt)
 			ts.Exemplars = append(ts.Exemplars, exemplars...)
 		}
 
-	// add _created time series if needed
+		// add created time series if needed
 		if settings.ExportCreatedMetric && metric.Sum().IsMonotonic() {
 			startTimestamp := pt.StartTimestamp()
 			if startTimestamp == 0 {
 				return
 			}
 
-		createdLabels := make([]prompb.Label, len(labels))
+			createdLabels := make([]prompb.Label, len(lbls))
-		copy(createdLabels, labels)
+			copy(createdLabels, lbls)
 			for i, l := range createdLabels {
 				if l.Name == model.MetricNameLabel {
 					createdLabels[i].Value = name + createdSuffix
 					break
 				}
 			}
-		addCreatedTimeSeriesIfNeeded(series, createdLabels, startTimestamp, pt.Timestamp(), metric.Type().String())
+			c.addTimeSeriesIfNeeded(createdLabels, startTimestamp, pt.Timestamp())
+		}
 	}
 }

storage/remote/otlptranslator/prometheusremotewrite/otlp_to_openmetrics_metadata.go

@@ -1,14 +1,25 @@
-// DO NOT EDIT. COPIED AS-IS. SEE ../README.md
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheusremotewrite/otlp_to_openmetrics_metadata.go
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
 
-// Copyright The OpenTelemetry Authors
+package prometheusremotewrite
-// SPDX-License-Identifier: Apache-2.0
-
-package prometheusremotewrite // import "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheusremotewrite"
 
 import (
-	"github.com/prometheus/prometheus/prompb"
 	"go.opentelemetry.io/collector/pdata/pmetric"
 
+	"github.com/prometheus/prometheus/prompb"
 	prometheustranslator "github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheus"
 )
 

storage/remote/otlptranslator/update-copy.sh

@@ -1,27 +0,0 @@
-#!/bin/bash
-set -xe
-
-OTEL_VERSION=v0.95.0
-
-git clone https://github.com/open-telemetry/opentelemetry-collector-contrib ./tmp
-cd ./tmp
-git checkout $OTEL_VERSION
-cd ..
-
-rm -rf ./prometheusremotewrite/*
-cp -r ./tmp/pkg/translator/prometheusremotewrite/*.go ./prometheusremotewrite
-rm -rf ./prometheusremotewrite/*_test.go
-
-rm -rf ./prometheus/*
-cp -r ./tmp/pkg/translator/prometheus/*.go ./prometheus
-rm -rf ./prometheus/*_test.go
-
-rm -rf ./tmp
-
-case $(sed --help 2>&1) in
-  *GNU*) set sed -i;;
-  *)     set sed -i '';;
-esac
-
-"$@" -e 's#github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/prometheus#github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheus#g' ./prometheusremotewrite/*.go ./prometheus/*.go
-"$@" -e '1s#^#// DO NOT EDIT. COPIED AS-IS. SEE ../README.md\n\n#g' ./prometheusremotewrite/*.go ./prometheus/*.go

storage/remote/write_handler.go

@@ -208,21 +208,15 @@ func (h *otlpWriteHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	prwMetricsMap, errs := otlptranslator.FromMetrics(req.Metrics(), otlptranslator.Settings{
+	converter := otlptranslator.NewPrometheusConverter()
+	if err := converter.FromMetrics(req.Metrics(), otlptranslator.Settings{
 		AddMetricSuffixes: true,
-	})
+	}); err != nil {
-	if errs != nil {
+		level.Warn(h.logger).Log("msg", "Error translating OTLP metrics to Prometheus write request", "err", err)
-		level.Warn(h.logger).Log("msg", "Error translating OTLP metrics to Prometheus write request", "err", errs)
-	}
-
-	prwMetrics := make([]prompb.TimeSeries, 0, len(prwMetricsMap))
-
-	for _, ts := range prwMetricsMap {
-		prwMetrics = append(prwMetrics, *ts)
 	}
 
 	err = h.rwHandler.write(r.Context(), &prompb.WriteRequest{
-		Timeseries: prwMetrics,
+		Timeseries: converter.TimeSeries(),
 	})
 
 	switch {

tsdb/querier.go

@@ -331,7 +331,7 @@ func postingsForMatcher(ctx context.Context, ix IndexReader, m *labels.Matcher)
 		return nil, err
 	}
 
-	var res []string
+	res := vals[:0]
 	for _, val := range vals {
 		if m.Matches(val) {
 			res = append(res, val)
@@ -368,7 +368,7 @@ func inversePostingsForMatcher(ctx context.Context, ix IndexReader, m *labels.Ma
 		return nil, err
 	}
 
-	var res []string
+	res := vals[:0]
 	// If the inverse match is ="", we just want all the values.
 	if m.Type == labels.MatchEqual && m.Value == "" {
 		res = vals

web/api/v1/api_test.go

@@ -15,7 +15,6 @@ package v1
 
 import (
 	"context"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -35,6 +34,7 @@ import (
 	"github.com/prometheus/prometheus/util/testutil"
 
 	"github.com/go-kit/log"
+	jsoniter "github.com/json-iterator/go"
 	"github.com/prometheus/client_golang/prometheus"
 	config_util "github.com/prometheus/common/config"
 	"github.com/prometheus/common/model"
@@ -910,6 +910,7 @@ func TestStats(t *testing.T) {
 				require.IsType(t, &QueryData{}, i)
 				qd := i.(*QueryData)
 				require.NotNil(t, qd.Stats)
+				json := jsoniter.ConfigCompatibleWithStandardLibrary
 				j, err := json.Marshal(qd.Stats)
 				require.NoError(t, err)
 				require.JSONEq(t, `{"custom":"Custom Value"}`, string(j))
@@ -1171,6 +1172,25 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 				},
 			},
 		},
+		// Test empty vector result
+		{
+			endpoint: api.query,
+			query: url.Values{
+				"query": []string{"bottomk(2, notExists)"},
+			},
+			responseAsJSON: `{"resultType":"vector","result":[]}`,
+		},
+		// Test empty matrix result
+		{
+			endpoint: api.queryRange,
+			query: url.Values{
+				"query": []string{"bottomk(2, notExists)"},
+				"start": []string{"0"},
+				"end":   []string{"2"},
+				"step":  []string{"1"},
+			},
+			responseAsJSON: `{"resultType":"matrix","result":[]}`,
+		},
 		// Missing query params in range queries.
 		{
 			endpoint: api.queryRange,
@@ -2891,10 +2911,13 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 						if test.zeroFunc != nil {
 							test.zeroFunc(res.data)
 						}
+						if test.response != nil {
 							assertAPIResponse(t, res.data, test.response)
 						}
+					}
 
 					if test.responseAsJSON != "" {
+						json := jsoniter.ConfigCompatibleWithStandardLibrary
 						s, err := json.Marshal(res.data)
 						require.NoError(t, err)
 						require.JSONEq(t, test.responseAsJSON, string(s))
@@ -3292,18 +3315,7 @@ func TestRespondError(t *testing.T) {
 	require.Equal(t, want, have, "Return code %d expected in error response but got %d", want, have)
 	h := resp.Header.Get("Content-Type")
 	require.Equal(t, "application/json", h, "Expected Content-Type %q but got %q", "application/json", h)
-
+	require.JSONEq(t, `{"status": "error", "data": "test", "errorType": "timeout", "error": "message"}`, string(body))
-	var res Response
-	err = json.Unmarshal(body, &res)
-	require.NoError(t, err, "Error unmarshaling JSON body")
-
-	exp := &Response{
-		Status:    statusError,
-		Data:      "test",
-		ErrorType: errorTimeout,
-		Error:     "message",
-	}
-	require.Equal(t, exp, &res)
 }
 
 func TestParseTimeParam(t *testing.T) {

web/api/v1/json_codec.go

@@ -25,11 +25,13 @@ import (
 )
 
 func init() {
-	jsoniter.RegisterTypeEncoderFunc("promql.Series", marshalSeriesJSON, marshalSeriesJSONIsEmpty)
+	jsoniter.RegisterTypeEncoderFunc("promql.Vector", unsafeMarshalVectorJSON, neverEmpty)
-	jsoniter.RegisterTypeEncoderFunc("promql.Sample", marshalSampleJSON, marshalSampleJSONIsEmpty)
+	jsoniter.RegisterTypeEncoderFunc("promql.Matrix", unsafeMarshalMatrixJSON, neverEmpty)
-	jsoniter.RegisterTypeEncoderFunc("promql.FPoint", marshalFPointJSON, marshalPointJSONIsEmpty)
+	jsoniter.RegisterTypeEncoderFunc("promql.Series", unsafeMarshalSeriesJSON, neverEmpty)
-	jsoniter.RegisterTypeEncoderFunc("promql.HPoint", marshalHPointJSON, marshalPointJSONIsEmpty)
+	jsoniter.RegisterTypeEncoderFunc("promql.Sample", unsafeMarshalSampleJSON, neverEmpty)
-	jsoniter.RegisterTypeEncoderFunc("exemplar.Exemplar", marshalExemplarJSON, marshalExemplarJSONEmpty)
+	jsoniter.RegisterTypeEncoderFunc("promql.FPoint", unsafeMarshalFPointJSON, neverEmpty)
+	jsoniter.RegisterTypeEncoderFunc("promql.HPoint", unsafeMarshalHPointJSON, neverEmpty)
+	jsoniter.RegisterTypeEncoderFunc("exemplar.Exemplar", marshalExemplarJSON, neverEmpty)
 	jsoniter.RegisterTypeEncoderFunc("labels.Labels", unsafeMarshalLabelsJSON, labelsIsEmpty)
 }
 
@@ -66,8 +68,12 @@ func (j JSONCodec) Encode(resp *Response) ([]byte, error) {
 //	      < more histograms >
 //	   ],
 //	},
-func marshalSeriesJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
+func unsafeMarshalSeriesJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 	s := *((*promql.Series)(ptr))
+	marshalSeriesJSON(s, stream)
+}
+
+func marshalSeriesJSON(s promql.Series, stream *jsoniter.Stream) {
 	stream.WriteObjectStart()
 	stream.WriteObjectField(`metric`)
 	marshalLabelsJSON(s.Metric, stream)
@@ -78,7 +84,7 @@ func marshalSeriesJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 			stream.WriteObjectField(`values`)
 			stream.WriteArrayStart()
 		}
-		marshalFPointJSON(unsafe.Pointer(&p), stream)
+		marshalFPointJSON(p, stream)
 	}
 	if len(s.Floats) > 0 {
 		stream.WriteArrayEnd()
@@ -89,7 +95,7 @@ func marshalSeriesJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 			stream.WriteObjectField(`histograms`)
 			stream.WriteArrayStart()
 		}
-		marshalHPointJSON(unsafe.Pointer(&p), stream)
+		marshalHPointJSON(p, stream)
 	}
 	if len(s.Histograms) > 0 {
 		stream.WriteArrayEnd()
@@ -97,7 +103,8 @@ func marshalSeriesJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 	stream.WriteObjectEnd()
 }
 
-func marshalSeriesJSONIsEmpty(unsafe.Pointer) bool {
+// In the Prometheus API we render an empty object as `[]` or similar.
+func neverEmpty(unsafe.Pointer) bool {
 	return false
 }
 
@@ -122,8 +129,12 @@ func marshalSeriesJSONIsEmpty(unsafe.Pointer) bool {
 //	   },
 //	   "histogram": [ 1435781451.781, { < histogram, see jsonutil.MarshalHistogram > } ]
 //	},
-func marshalSampleJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
+func unsafeMarshalSampleJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 	s := *((*promql.Sample)(ptr))
+	marshalSampleJSON(s, stream)
+}
+
+func marshalSampleJSON(s promql.Sample, stream *jsoniter.Stream) {
 	stream.WriteObjectStart()
 	stream.WriteObjectField(`metric`)
 	marshalLabelsJSON(s.Metric, stream)
@@ -145,13 +156,13 @@ func marshalSampleJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 	stream.WriteObjectEnd()
 }
 
-func marshalSampleJSONIsEmpty(unsafe.Pointer) bool {
+// marshalFPointJSON writes `[ts, "1.234"]`.
-	return false
+func unsafeMarshalFPointJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
+	p := *((*promql.FPoint)(ptr))
+	marshalFPointJSON(p, stream)
 }
 
-// marshalFPointJSON writes `[ts, "1.234"]`.
+func marshalFPointJSON(p promql.FPoint, stream *jsoniter.Stream) {
-func marshalFPointJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
-	p := *((*promql.FPoint)(ptr))
 	stream.WriteArrayStart()
 	jsonutil.MarshalTimestamp(p.T, stream)
 	stream.WriteMore()
@@ -160,8 +171,12 @@ func marshalFPointJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 }
 
 // marshalHPointJSON writes `[ts, { < histogram, see jsonutil.MarshalHistogram > } ]`.
-func marshalHPointJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
+func unsafeMarshalHPointJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 	p := *((*promql.HPoint)(ptr))
+	marshalHPointJSON(p, stream)
+}
+
+func marshalHPointJSON(p promql.HPoint, stream *jsoniter.Stream) {
 	stream.WriteArrayStart()
 	jsonutil.MarshalTimestamp(p.T, stream)
 	stream.WriteMore()
@@ -169,10 +184,6 @@ func marshalHPointJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 	stream.WriteArrayEnd()
 }
 
-func marshalPointJSONIsEmpty(unsafe.Pointer) bool {
-	return false
-}
-
 // marshalExemplarJSON writes.
 //
 //	{
@@ -201,10 +212,6 @@ func marshalExemplarJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 	stream.WriteObjectEnd()
 }
 
-func marshalExemplarJSONEmpty(unsafe.Pointer) bool {
-	return false
-}
-
 func unsafeMarshalLabelsJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
 	labelsPtr := (*labels.Labels)(ptr)
 	marshalLabelsJSON(*labelsPtr, stream)
@@ -229,3 +236,29 @@ func labelsIsEmpty(ptr unsafe.Pointer) bool {
 	labelsPtr := (*labels.Labels)(ptr)
 	return labelsPtr.IsEmpty()
 }
+
+// Marshal a Vector as `[sample,sample,...]` - empty Vector is `[]`.
+func unsafeMarshalVectorJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
+	v := *((*promql.Vector)(ptr))
+	stream.WriteArrayStart()
+	for i, s := range v {
+		marshalSampleJSON(s, stream)
+		if i != len(v)-1 {
+			stream.WriteMore()
+		}
+	}
+	stream.WriteArrayEnd()
+}
+
+// Marshal a Matrix as `[series,series,...]` - empty Matrix is `[]`.
+func unsafeMarshalMatrixJSON(ptr unsafe.Pointer, stream *jsoniter.Stream) {
+	m := *((*promql.Matrix)(ptr))
+	stream.WriteArrayStart()
+	for i, s := range m {
+		marshalSeriesJSON(s, stream)
+		if i != len(m)-1 {
+			stream.WriteMore()
+		}
+	}
+	stream.WriteArrayEnd()
+}

web/api/v1/json_codec_test.go

@@ -29,6 +29,40 @@ func TestJsonCodec_Encode(t *testing.T) {
 		response interface{}
 		expected string
 	}{
+		{
+			response: &QueryData{
+				ResultType: parser.ValueTypeVector,
+				Result: promql.Vector{
+					promql.Sample{
+						Metric: labels.FromStrings("__name__", "foo"),
+						T:      1000,
+						F:      1,
+					},
+					promql.Sample{
+						Metric: labels.FromStrings("__name__", "bar"),
+						T:      2000,
+						F:      2,
+					},
+				},
+			},
+			expected: `{"status":"success","data":{"resultType":"vector","result":[{"metric":{"__name__":"foo"},"value":[1,"1"]},{"metric":{"__name__":"bar"},"value":[2,"2"]}]}}`,
+		},
+		{
+			response: &QueryData{
+				ResultType: parser.ValueTypeMatrix,
+				Result: promql.Matrix{
+					promql.Series{
+						Metric: labels.FromStrings("__name__", "foo"),
+						Floats: []promql.FPoint{{F: 1, T: 1000}},
+					},
+					promql.Series{
+						Metric: labels.FromStrings("__name__", "bar"),
+						Floats: []promql.FPoint{{F: 2, T: 2000}},
+					},
+				},
+			},
+			expected: `{"status":"success","data":{"resultType":"matrix","result":[{"metric":{"__name__":"foo"},"values":[[1,"1"]]},{"metric":{"__name__":"bar"},"values":[[2,"2"]]}]}}`,
+		},
 		{
 			response: &QueryData{
 				ResultType: parser.ValueTypeMatrix,

web/ui/module/codemirror-promql/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/codemirror-promql",
-  "version": "0.51.2",
+  "version": "0.52.0-rc.1",
   "description": "a CodeMirror mode for the PromQL language",
   "types": "dist/esm/index.d.ts",
   "module": "dist/esm/index.js",
@@ -29,7 +29,7 @@
   },
   "homepage": "https://github.com/prometheus/prometheus/blob/main/web/ui/module/codemirror-promql/README.md",
   "dependencies": {
-    "@prometheus-io/lezer-promql": "0.51.2",
+    "@prometheus-io/lezer-promql": "0.52.0-rc.1",
     "lru-cache": "^7.18.3"
   },
   "devDependencies": {

web/ui/module/codemirror-promql/src/complete/hybrid.test.ts

@@ -251,6 +251,12 @@ describe('analyzeCompletion test', () => {
       pos: 11, // cursor is between the bracket after the string myL
       expectedContext: [{ kind: ContextKind.LabelName }],
     },
+    {
+      title: 'continue to autocomplete QuotedLabelName in aggregate modifier',
+      expr: 'sum by ("myL")',
+      pos: 12, // cursor is between the bracket after the string myL
+      expectedContext: [{ kind: ContextKind.LabelName }],
+    },
     {
       title: 'autocomplete labelName in a list',
       expr: 'sum by (myLabel1,)',
@@ -263,6 +269,12 @@ describe('analyzeCompletion test', () => {
       pos: 23, // cursor is between the bracket after the string myLab
       expectedContext: [{ kind: ContextKind.LabelName }],
     },
+    {
+      title: 'autocomplete labelName in a list 2',
+      expr: 'sum by ("myLabel1", "myLab")',
+      pos: 27, // cursor is between the bracket after the string myLab
+      expectedContext: [{ kind: ContextKind.LabelName }],
+    },
     {
       title: 'autocomplete labelName associated to a metric',
       expr: 'metric_name{}',
@@ -299,6 +311,12 @@ describe('analyzeCompletion test', () => {
       pos: 22, // cursor is between the bracket after the comma
       expectedContext: [{ kind: ContextKind.LabelName, metricName: '' }],
     },
+    {
+      title: 'continue to autocomplete quoted labelName associated to a metric',
+      expr: '{"metric_"}',
+      pos: 10, // cursor is between the bracket after the string metric_
+      expectedContext: [{ kind: ContextKind.MetricName, metricName: 'metric_' }],
+    },
     {
       title: 'autocomplete the labelValue with metricName + labelName',
       expr: 'metric_name{labelName=""}',
@@ -342,6 +360,30 @@ describe('analyzeCompletion test', () => {
         },
       ],
     },
+    {
+      title: 'autocomplete the labelValue with metricName + quoted labelName',
+      expr: 'metric_name{labelName="labelValue", "labelName"!=""}',
+      pos: 50, // cursor is between the quotes
+      expectedContext: [
+        {
+          kind: ContextKind.LabelValue,
+          metricName: 'metric_name',
+          labelName: 'labelName',
+          matchers: [
+            {
+              name: 'labelName',
+              type: Neq,
+              value: '',
+            },
+            {
+              name: 'labelName',
+              type: EqlSingle,
+              value: 'labelValue',
+            },
+          ],
+        },
+      ],
+    },
     {
       title: 'autocomplete the labelValue associated to a labelName',
       expr: '{labelName=""}',
@@ -427,6 +469,12 @@ describe('analyzeCompletion test', () => {
       pos: 22, // cursor is after '!'
       expectedContext: [{ kind: ContextKind.MatchOp }],
     },
+    {
+      title: 'autocomplete matchOp 3',
+      expr: 'metric_name{"labelName"!}',
+      pos: 24, // cursor is after '!'
+      expectedContext: [{ kind: ContextKind.BinOp }],
+    },
     {
       title: 'autocomplete duration with offset',
       expr: 'http_requests_total offset 5',

web/ui/module/codemirror-promql/src/complete/hybrid.ts

@@ -29,7 +29,6 @@ import {
   GroupingLabels,
   Gte,
   Gtr,
-  LabelMatcher,
   LabelMatchers,
   LabelName,
   Lss,
@@ -52,6 +51,9 @@ import {
   SubqueryExpr,
   Unless,
   VectorSelector,
+  UnquotedLabelMatcher,
+  QuotedLabelMatcher,
+  QuotedLabelName,
 } from '@prometheus-io/lezer-promql';
 import { Completion, CompletionContext, CompletionResult } from '@codemirror/autocomplete';
 import { EditorState } from '@codemirror/state';
@@ -181,7 +183,10 @@ export function computeStartCompletePosition(node: SyntaxNode, pos: number): num
   let start = node.from;
   if (node.type.id === LabelMatchers || node.type.id === GroupingLabels) {
     start = computeStartCompleteLabelPositionInLabelMatcherOrInGroupingLabel(node, pos);
-  } else if (node.type.id === FunctionCallBody || (node.type.id === StringLiteral && node.parent?.type.id === LabelMatcher)) {
+  } else if (
+    node.type.id === FunctionCallBody ||
+    (node.type.id === StringLiteral && (node.parent?.type.id === UnquotedLabelMatcher || node.parent?.type.id === QuotedLabelMatcher))
+  ) {
     // When the cursor is between bracket, quote, we need to increment the starting position to avoid to consider the open bracket/ first string.
     start++;
   } else if (
@@ -212,7 +217,7 @@ export function analyzeCompletion(state: EditorState, node: SyntaxNode): Context
         result.push({ kind: ContextKind.Duration });
         break;
       }
-      if (node.parent?.type.id === LabelMatcher) {
+      if (node.parent?.type.id === UnquotedLabelMatcher || node.parent?.type.id === QuotedLabelMatcher) {
         // In this case the current token is not itself a valid match op yet:
         //      metric_name{labelName!}
         result.push({ kind: ContextKind.MatchOp });
@@ -380,7 +385,7 @@ export function analyzeCompletion(state: EditorState, node: SyntaxNode): Context
         //      sum by (myL)
         // So we have to continue to autocomplete any kind of labelName
         result.push({ kind: ContextKind.LabelName });
-      } else if (node.parent?.type.id === LabelMatcher) {
+      } else if (node.parent?.type.id === UnquotedLabelMatcher) {
         // In that case we are in the given situation:
         //       metric_name{myL} or {myL}
         // so we have or to continue to autocomplete any kind of labelName or
@@ -389,9 +394,9 @@ export function analyzeCompletion(state: EditorState, node: SyntaxNode): Context
       }
       break;
     case StringLiteral:
-      if (node.parent?.type.id === LabelMatcher) {
+      if (node.parent?.type.id === UnquotedLabelMatcher || node.parent?.type.id === QuotedLabelMatcher) {
         // In this case we are in the given situation:
-        //      metric_name{labelName=""}
+        //      metric_name{labelName=""} or metric_name{"labelName"=""}
         // So we can autocomplete the labelValue
 
         // Get the labelName.
@@ -399,18 +404,34 @@ export function analyzeCompletion(state: EditorState, node: SyntaxNode): Context
         let labelName = '';
         if (node.parent.firstChild?.type.id === LabelName) {
           labelName = state.sliceDoc(node.parent.firstChild.from, node.parent.firstChild.to);
+        } else if (node.parent.firstChild?.type.id === QuotedLabelName) {
+          labelName = state.sliceDoc(node.parent.firstChild.from, node.parent.firstChild.to).slice(1, -1);
         }
         // then find the metricName if it exists
         const metricName = getMetricNameInVectorSelector(node, state);
         // finally get the full matcher available
         const matcherNode = walkBackward(node, LabelMatchers);
-        const labelMatchers = buildLabelMatchers(matcherNode ? matcherNode.getChildren(LabelMatcher) : [], state);
+        const labelMatcherOpts = [QuotedLabelName, QuotedLabelMatcher, UnquotedLabelMatcher];
+        let labelMatchers: Matcher[] = [];
+        for (const labelMatcherOpt of labelMatcherOpts) {
+          labelMatchers = labelMatchers.concat(buildLabelMatchers(matcherNode ? matcherNode.getChildren(labelMatcherOpt) : [], state));
+        }
         result.push({
           kind: ContextKind.LabelValue,
           metricName: metricName,
           labelName: labelName,
           matchers: labelMatchers,
         });
+      } else if (node.parent?.parent?.type.id === GroupingLabels) {
+        // In this case we are in the given situation:
+        //      sum by ("myL")
+        // So we have to continue to autocomplete any kind of labelName
+        result.push({ kind: ContextKind.LabelName });
+      } else if (node.parent?.parent?.type.id === LabelMatchers) {
+        // In that case we are in the given situation:
+        //       {""} or {"metric_"}
+        // since this is for the QuotedMetricName we need to continue to autocomplete for the metric names
+        result.push({ kind: ContextKind.MetricName, metricName: state.sliceDoc(node.from, node.to).slice(1, -1) });
       }
       break;
     case NumberLiteral:

web/ui/module/codemirror-promql/src/parser/matcher.ts

@@ -12,15 +12,50 @@
 // limitations under the License.
 
 import { SyntaxNode } from '@lezer/common';
-import { EqlRegex, EqlSingle, LabelName, MatchOp, Neq, NeqRegex, StringLiteral } from '@prometheus-io/lezer-promql';
+import {
+  EqlRegex,
+  EqlSingle,
+  LabelName,
+  MatchOp,
+  Neq,
+  NeqRegex,
+  StringLiteral,
+  UnquotedLabelMatcher,
+  QuotedLabelMatcher,
+  QuotedLabelName,
+} from '@prometheus-io/lezer-promql';
 import { EditorState } from '@codemirror/state';
 import { Matcher } from '../types';
 
 function createMatcher(labelMatcher: SyntaxNode, state: EditorState): Matcher {
   const matcher = new Matcher(0, '', '');
   const cursor = labelMatcher.cursor();
+  switch (cursor.type.id) {
+    case QuotedLabelMatcher:
       if (!cursor.next()) {
-    // weird case, that would mean the labelMatcher doesn't have any child.
+        // weird case, that would mean the QuotedLabelMatcher doesn't have any child.
+        return matcher;
+      }
+      do {
+        switch (cursor.type.id) {
+          case QuotedLabelName:
+            matcher.name = state.sliceDoc(cursor.from, cursor.to).slice(1, -1);
+            break;
+          case MatchOp:
+            const ope = cursor.node.firstChild;
+            if (ope) {
+              matcher.type = ope.type.id;
+            }
+            break;
+          case StringLiteral:
+            matcher.value = state.sliceDoc(cursor.from, cursor.to).slice(1, -1);
+            break;
+        }
+      } while (cursor.nextSibling());
+      break;
+    case UnquotedLabelMatcher:
+      if (!cursor.next()) {
+        // weird case, that would mean the UnquotedLabelMatcher doesn't have any child.
         return matcher;
       }
       do {
@@ -39,6 +74,13 @@ function createMatcher(labelMatcher: SyntaxNode, state: EditorState): Matcher {
             break;
         }
       } while (cursor.nextSibling());
+      break;
+    case QuotedLabelName:
+      matcher.name = '__name__';
+      matcher.value = state.sliceDoc(cursor.from, cursor.to).slice(1, -1);
+      matcher.type = EqlSingle;
+      break;
+  }
   return matcher;
 }
 

web/ui/module/codemirror-promql/src/parser/parser.test.ts

@@ -204,6 +204,11 @@ describe('promql operations', () => {
       expectedValueType: ValueType.vector,
       expectedDiag: [] as Diagnostic[],
     },
+    {
+      expr: 'foo and on(test,"blub") bar',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [] as Diagnostic[],
+    },
     {
       expr: 'foo and on() bar',
       expectedValueType: ValueType.vector,
@@ -214,6 +219,11 @@ describe('promql operations', () => {
       expectedValueType: ValueType.vector,
       expectedDiag: [] as Diagnostic[],
     },
+    {
+      expr: 'foo and ignoring(test,"blub") bar',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [] as Diagnostic[],
+    },
     {
       expr: 'foo and ignoring() bar',
       expectedValueType: ValueType.vector,
@@ -229,6 +239,11 @@ describe('promql operations', () => {
       expectedValueType: ValueType.vector,
       expectedDiag: [] as Diagnostic[],
     },
+    {
+      expr: 'foo / on(test,blub) group_left("bar") bar',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [] as Diagnostic[],
+    },
     {
       expr: 'foo / ignoring(test,blub) group_left(blub) bar',
       expectedValueType: ValueType.vector,
@@ -825,6 +840,134 @@ describe('promql operations', () => {
       expectedValueType: ValueType.vector,
       expectedDiag: [],
     },
+    {
+      expr: '{"foo"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      // with metric name in the middle
+      expr: '{a="b","foo",c~="d"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      expr: '{"foo", a="bc"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      expr: '{"colon:in:the:middle"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      expr: '{"dot.in.the.middle"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      expr: '{"😀 in metric name"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      // quotes with escape
+      expr: '{"this is \"foo\" metric"}', // eslint-disable-line
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      expr: '{"foo","colon:in:the:middle"="val"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      expr: '{"foo","dot.in.the.middle"="val"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      expr: '{"foo","😀 in label name"="val"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      // quotes with escape
+      expr: '{"foo","this is \"bar\" label"="val"}', // eslint-disable-line
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      expr: 'foo{"bar"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [
+        {
+          from: 0,
+          message: 'metric name must not be set twice: foo or bar',
+          severity: 'error',
+          to: 10,
+        },
+      ],
+    },
+    {
+      expr: '{"foo", __name__="bar"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [
+        {
+          from: 0,
+          message: 'metric name must not be set twice: foo or bar',
+          severity: 'error',
+          to: 23,
+        },
+      ],
+    },
+    {
+      expr: '{"foo", "__name__"="bar"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [
+        {
+          from: 0,
+          message: 'metric name must not be set twice: foo or bar',
+          severity: 'error',
+          to: 25,
+        },
+      ],
+    },
+    {
+      expr: '{"__name__"="foo", __name__="bar"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [
+        {
+          from: 0,
+          message: 'metric name must not be set twice: foo or bar',
+          severity: 'error',
+          to: 34,
+        },
+      ],
+    },
+    {
+      expr: '{"foo", "bar"}',
+      expectedValueType: ValueType.vector,
+      expectedDiag: [
+        {
+          from: 0,
+          to: 14,
+          message: 'metric name must not be set twice: foo or bar',
+          severity: 'error',
+        },
+      ],
+    },
+    {
+      expr: `{'foo\`metric':'bar'}`, // eslint-disable-line
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
+    {
+      expr: '{`foo\"metric`=`bar`}', // eslint-disable-line
+      expectedValueType: ValueType.vector,
+      expectedDiag: [],
+    },
   ];
   testCases.forEach((value) => {
     const state = createEditorState(value.expr);

web/ui/module/codemirror-promql/src/parser/parser.ts

@@ -27,7 +27,6 @@ import {
   Gte,
   Gtr,
   Identifier,
-  LabelMatcher,
   LabelMatchers,
   Lss,
   Lte,
@@ -36,11 +35,14 @@ import {
   Or,
   ParenExpr,
   Quantile,
+  QuotedLabelMatcher,
+  QuotedLabelName,
   StepInvariantExpr,
   SubqueryExpr,
   Topk,
   UnaryExpr,
   Unless,
+  UnquotedLabelMatcher,
   VectorSelector,
 } from '@prometheus-io/lezer-promql';
 import { containsAtLeastOneChild } from './path-finder';
@@ -282,7 +284,11 @@ export class Parser {
 
   private checkVectorSelector(node: SyntaxNode): void {
     const matchList = node.getChild(LabelMatchers);
-    const labelMatchers = buildLabelMatchers(matchList ? matchList.getChildren(LabelMatcher) : [], this.state);
+    const labelMatcherOpts = [QuotedLabelName, QuotedLabelMatcher, UnquotedLabelMatcher];
+    let labelMatchers: Matcher[] = [];
+    for (const labelMatcherOpt of labelMatcherOpts) {
+      labelMatchers = labelMatchers.concat(buildLabelMatchers(matchList ? matchList.getChildren(labelMatcherOpt) : [], this.state));
+    }
     let vectorSelectorName = '';
     // VectorSelector ( Identifier )
     // https://github.com/promlabs/lezer-promql/blob/71e2f9fa5ae6f5c5547d5738966cd2512e6b99a8/src/promql.grammar#L200
@@ -301,6 +307,14 @@ export class Parser {
       // adding the metric name as a Matcher to avoid a false positive for this kind of expression:
       // foo{bare=''}
       labelMatchers.push(new Matcher(EqlSingle, '__name__', vectorSelectorName));
+    } else {
+      // In this case when metric name is not set outside the braces
+      // It is checking whether metric name is set twice like in :
+      // {__name__:"foo", "foo"}, {"foo", "bar"}
+      const labelMatchersMetricName = labelMatchers.filter((lm) => lm.name === '__name__');
+      if (labelMatchersMetricName.length > 1) {
+        this.addDiagnostic(node, `metric name must not be set twice: ${labelMatchersMetricName[0].value} or ${labelMatchersMetricName[1].value}`);
+      }
     }
 
     // A Vector selector must contain at least one non-empty matcher to prevent

web/ui/module/lezer-promql/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/lezer-promql",
-  "version": "0.51.2",
+  "version": "0.52.0-rc.1",
   "description": "lezer-based PromQL grammar",
   "main": "dist/index.cjs",
   "type": "module",

web/ui/module/lezer-promql/src/promql.grammar

@@ -97,7 +97,7 @@ binModifiers {
 }
 
 GroupingLabels {
-  "(" (LabelName ("," LabelName)* ","?)? ")"
+  "(" ((LabelName | QuotedLabelName) ("," (LabelName | QuotedLabelName))* ","?)? ")"
 }
 
 FunctionCall {
@@ -220,7 +220,7 @@ VectorSelector {
 }
 
 LabelMatchers {
-  "{" (LabelMatcher ("," LabelMatcher)* ","?)? "}"
+  "{" ((UnquotedLabelMatcher | QuotedLabelMatcher | QuotedLabelName)("," (UnquotedLabelMatcher | QuotedLabelMatcher | QuotedLabelName))* ","?)? "}"
 }
 
 MatchOp {
@@ -230,10 +230,18 @@ MatchOp {
   NeqRegex
 }
 
-LabelMatcher {
+UnquotedLabelMatcher {
     LabelName MatchOp StringLiteral
 }
 
+QuotedLabelMatcher {
+    QuotedLabelName MatchOp StringLiteral
+}
+
+QuotedLabelName {
+    StringLiteral
+}
+
 StepInvariantExpr {
   expr At ( NumberLiteral | AtModifierPreprocessors "(" ")" )
 }

web/ui/module/lezer-promql/test/expression.txt

@@ -112,6 +112,54 @@ PromQL(
     )
 )
 
+# Quoted label name in grouping labels
+
+sum by("job", mode) (test_metric) / on("job") group_left sum by("job")(test_metric)
+
+==>
+
+PromQL(
+    BinaryExpr(
+        AggregateExpr(
+          AggregateOp(Sum),
+          AggregateModifier(
+            By,
+            GroupingLabels(
+                QuotedLabelName(StringLiteral),
+                LabelName
+            )
+          ),
+          FunctionCallBody(
+                VectorSelector(
+                  Identifier
+                )
+          )
+      ),
+      Div,
+        MatchingModifierClause(
+          On,
+          GroupingLabels(
+              QuotedLabelName(StringLiteral)
+          )
+          GroupLeft
+        ),
+        AggregateExpr(
+          AggregateOp(Sum),
+          AggregateModifier(
+            By,
+            GroupingLabels(
+                QuotedLabelName(StringLiteral)
+            )
+          ),
+          FunctionCallBody(
+                VectorSelector(
+                  Identifier
+                )
+          )
+        )
+    )
+)
+
 # Case insensitivity for aggregations and binop modifiers.
 
 SuM BY(testlabel1) (testmetric1) / IGNOring(testlabel2) AVG withOUT(testlabel3) (testmetric2)
@@ -226,22 +274,22 @@ PromQL(
     VectorSelector(
       Identifier,
       LabelMatchers(
-        LabelMatcher(
+        UnquotedLabelMatcher(
             LabelName,
             MatchOp(EqlSingle),
             StringLiteral
         ),
-        LabelMatcher(
+        UnquotedLabelMatcher(
             LabelName,
             MatchOp(Neq),
             StringLiteral
         ),
-        LabelMatcher(
+        UnquotedLabelMatcher(
             LabelName,
             MatchOp(EqlRegex),
             StringLiteral
         ),
-        LabelMatcher(
+        UnquotedLabelMatcher(
             LabelName,
             MatchOp(NeqRegex),
             StringLiteral
@@ -571,14 +619,14 @@ PromQL(NumberLiteral)
 NaN{foo="bar"}
 
 ==>
-PromQL(BinaryExpr(NumberLiteral,⚠,VectorSelector(LabelMatchers(LabelMatcher(LabelName,MatchOp(EqlSingle),StringLiteral)))))
+PromQL(BinaryExpr(NumberLiteral,⚠,VectorSelector(LabelMatchers(UnquotedLabelMatcher(LabelName,MatchOp(EqlSingle),StringLiteral)))))
 
 # Trying to illegally use Inf as a metric name.
 
 Inf{foo="bar"}
 
 ==>
-PromQL(BinaryExpr(NumberLiteral,⚠,VectorSelector(LabelMatchers(LabelMatcher(LabelName,MatchOp(EqlSingle),StringLiteral)))))
+PromQL(BinaryExpr(NumberLiteral,⚠,VectorSelector(LabelMatchers(UnquotedLabelMatcher(LabelName,MatchOp(EqlSingle),StringLiteral)))))
 
 # Negative offset
 
@@ -614,3 +662,24 @@ MetricName(Identifier)
 
 ==>
 PromQL(BinaryExpr(NumberLiteral,Add,BinaryExpr(VectorSelector(Identifier),Atan2,VectorSelector(Identifier))))
+
+# Testing quoted metric name
+
+{"metric_name"}
+
+==>
+PromQL(VectorSelector(LabelMatchers(QuotedLabelName(StringLiteral))))
+
+# Testing quoted label name
+
+{"foo"="bar"}
+
+==>
+PromQL(VectorSelector(LabelMatchers(QuotedLabelMatcher(QuotedLabelName(StringLiteral), MatchOp(EqlSingle), StringLiteral))))
+
+# Testing quoted metric name and label name
+
+{"metric_name", "foo"="bar"}
+
+==>
+PromQL(VectorSelector(LabelMatchers(QuotedLabelName(StringLiteral), QuotedLabelMatcher(QuotedLabelName(StringLiteral), MatchOp(EqlSingle), StringLiteral))))

web/ui/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "prometheus-io",
-  "version": "0.51.2",
+  "version": "0.52.0-rc.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "prometheus-io",
-      "version": "0.51.2",
+      "version": "0.52.0-rc.1",
       "workspaces": [
         "react-app",
         "module/*"
@@ -30,10 +30,10 @@
     },
     "module/codemirror-promql": {
       "name": "@prometheus-io/codemirror-promql",
-      "version": "0.51.2",
+      "version": "0.52.0-rc.1",
       "license": "Apache-2.0",
       "dependencies": {
-        "@prometheus-io/lezer-promql": "0.51.2",
+        "@prometheus-io/lezer-promql": "0.52.0-rc.1",
         "lru-cache": "^7.18.3"
       },
       "devDependencies": {
@@ -69,7 +69,7 @@
     },
     "module/lezer-promql": {
       "name": "@prometheus-io/lezer-promql",
-      "version": "0.51.2",
+      "version": "0.52.0-rc.1",
       "license": "Apache-2.0",
       "devDependencies": {
         "@lezer/generator": "^1.5.1",
@@ -19233,7 +19233,7 @@
     },
     "react-app": {
       "name": "@prometheus-io/app",
-      "version": "0.51.2",
+      "version": "0.52.0-rc.1",
       "dependencies": {
         "@codemirror/autocomplete": "^6.11.1",
         "@codemirror/commands": "^6.3.2",
@@ -19251,7 +19251,7 @@
         "@lezer/lr": "^1.3.14",
         "@nexucis/fuzzy": "^0.4.1",
         "@nexucis/kvsearch": "^0.8.1",
-        "@prometheus-io/codemirror-promql": "0.51.2",
+        "@prometheus-io/codemirror-promql": "0.52.0-rc.1",
         "bootstrap": "^4.6.2",
         "css.escape": "^1.5.1",
         "downshift": "^7.6.2",

web/ui/package.json

@@ -28,5 +28,5 @@
     "ts-jest": "^29.1.1",
     "typescript": "^4.9.5"
   },
-  "version": "0.51.2"
+  "version": "0.52.0-rc.1"
 }

web/ui/react-app/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/app",
-  "version": "0.51.2",
+  "version": "0.52.0-rc.1",
   "private": true,
   "dependencies": {
     "@codemirror/autocomplete": "^6.11.1",
@@ -19,7 +19,7 @@
     "@lezer/lr": "^1.3.14",
     "@nexucis/fuzzy": "^0.4.1",
     "@nexucis/kvsearch": "^0.8.1",
-    "@prometheus-io/codemirror-promql": "0.51.2",
+    "@prometheus-io/codemirror-promql": "0.52.0-rc.1",
     "bootstrap": "^4.6.2",
     "css.escape": "^1.5.1",
     "downshift": "^7.6.2",