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Drop series for federation if latest sample is stale.

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This commit is contained in:
Brian Brazil 2017-05-23 18:03:57 +01:00
parent 220e78b9c3
commit e5f94145b8
2 changed files with 33 additions and 1 deletions
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8
web/federate.go
View file

@ -26,6 +26,7 @@ import (
"github.com/prometheus/prometheus/pkg/labels"
"github.com/prometheus/prometheus/pkg/timestamp"
"github.com/prometheus/prometheus/pkg/value"
"github.com/prometheus/prometheus/promql"
"github.com/prometheus/prometheus/storage"
)
@ -99,6 +100,13 @@ func (h *Handler) federation(w http.ResponseWriter, req *http.Request) {
continue
}
}
// The exposition formats do not support stale markers, so drop them. This
// is good enough for staleness handling of federated data, as the
// interval-based limits on staleness will do the right thing for supported
// use cases (which is to say federating aggregated time series).
if value.IsStaleNaN(v) {
continue
}
vec = append(vec, promql.Sample{
Metric: s.Labels(),

26
web/federate_test.go
View file

@ -75,6 +75,18 @@ test_metric2{foo="boo",instance="i"} 1 6000000
code: 200,
body: `# TYPE test_metric_without_labels untyped
test_metric_without_labels{instance=""} 1001 6000000
`,
},
"test_stale_metric": {
params: "match[]=test_metric_stale",
code: 200,
body: ``,
},
"test_old_metric": {
params: "match[]=test_metric_old",
code: 200,
body: `# TYPE test_metric_old untyped
test_metric_old{instance=""} 981 5880000
`,
},
"{foo='boo'}": {
@ -104,6 +116,8 @@ test_metric1{foo="bar",instance="i"} 10000 6000000
test_metric1{foo="boo",instance="i"} 1 6000000
# TYPE test_metric2 untyped
test_metric2{foo="boo",instance="i"} 1 6000000
# TYPE test_metric_old untyped
test_metric_old{instance=""} 981 5880000
# TYPE test_metric_without_labels untyped
test_metric_without_labels{instance=""} 1001 6000000
`,
@ -111,7 +125,9 @@ test_metric_without_labels{instance=""} 1001 6000000
"empty label value matches everything that doesn't have that label": {
params: "match[]={foo='',__name__=~'.%2b'}",
code: 200,
body: `# TYPE test_metric_without_labels untyped
body: `# TYPE test_metric_old untyped
test_metric_old{instance=""} 981 5880000
# TYPE test_metric_without_labels untyped
test_metric_without_labels{instance=""} 1001 6000000
`,
},
@ -123,6 +139,8 @@ test_metric1{foo="bar",instance="i"} 10000 6000000
test_metric1{foo="boo",instance="i"} 1 6000000
# TYPE test_metric2 untyped
test_metric2{foo="boo",instance="i"} 1 6000000
# TYPE test_metric_old untyped
test_metric_old{instance=""} 981 5880000
# TYPE test_metric_without_labels untyped
test_metric_without_labels{instance=""} 1001 6000000
`,
@ -136,6 +154,8 @@ test_metric1{foo="bar",instance="i",zone="ie"} 10000 6000000
test_metric1{foo="boo",instance="i",zone="ie"} 1 6000000
# TYPE test_metric2 untyped
test_metric2{foo="boo",instance="i",zone="ie"} 1 6000000
# TYPE test_metric_old untyped
test_metric_old{foo="baz",instance="",zone="ie"} 981 5880000
# TYPE test_metric_without_labels untyped
test_metric_without_labels{foo="baz",instance="",zone="ie"} 1001 6000000
`,
@ -151,6 +171,8 @@ test_metric1{foo="bar",instance="i"} 10000 6000000
test_metric1{foo="boo",instance="i"} 1 6000000
# TYPE test_metric2 untyped
test_metric2{foo="boo",instance="i"} 1 6000000
# TYPE test_metric_old untyped
test_metric_old{instance="baz"} 981 5880000
# TYPE test_metric_without_labels untyped
test_metric_without_labels{instance="baz"} 1001 6000000
`,
@ -164,6 +186,8 @@ func TestFederation(t *testing.T) {
test_metric1{foo="boo",instance="i"} 1+0x100
test_metric2{foo="boo",instance="i"} 1+0x100
test_metric_without_labels 1+10x100
test_metric_stale 1+10x99 stale
test_metric_old 1+10x98
`)
if err != nil {
t.Fatal(err)