mudhorn/prometheus
1
0
Fork 0
mirror of https://github.com/prometheus/prometheus.git synced 2024-09-19 23:37:31 -07:00
Code Issues Actions 7 Packages Projects Releases Wiki Activity

Send instance="" with federation if instance not set.

Browse source 
This is needed for federating non-instance level metrics, so they don't
end up with the instance label of the prometheus target.

Also sort external labels, so label output order is consistent.
This commit is contained in:
Brian Brazil 2017-03-27 16:18:33 +01:00 committed by Brian Brazil
parent d42e01b07c
commit 8cd5aff8fe
2 changed files with 58 additions and 33 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
web/federate.go
View file

@ -74,6 +74,16 @@ func (h *Handler) federation(w http.ResponseWriter, req *http.Request) {
}
sort.Sort(byName(vector))
externalLabels := h.externalLabels.Clone()
if _, ok := externalLabels[model.InstanceLabel]; !ok {
externalLabels[model.InstanceLabel] = ""
}
externalLabelNames := make(model.LabelNames, 0, len(externalLabels))
for ln := range externalLabels {
externalLabelNames = append(externalLabelNames, ln)
}
sort.Sort(externalLabelNames)
var (
lastMetricName model.LabelValue
protMetricFam *dto.MetricFamily
@ -86,14 +96,13 @@ func (h *Handler) federation(w http.ResponseWriter, req *http.Request) {
}
// Sort labelnames for unittest consistency.
labelnames := make([]string, 0, len(s.Metric))
labelNames := make(model.LabelNames, 0, len(s.Metric))
for ln := range s.Metric {
labelnames = append(labelnames, string(ln))
labelNames = append(labelNames, ln)
}
sort.Strings(labelnames)
sort.Sort(labelNames)
for _, labelname := range labelnames {
ln := model.LabelName(labelname)
for _, ln := range labelNames {
lv := s.Metric[ln]
if lv == "" {
// No value means unset. Never consider those labels.
@ -127,7 +136,7 @@ func (h *Handler) federation(w http.ResponseWriter, req *http.Request) {
Name: proto.String(string(ln)),
Value: proto.String(string(lv)),
})
if _, ok := h.externalLabels[ln]; ok {
if _, ok := externalLabels[ln]; ok {
globalUsed[ln] = struct{}{}
}
}
@ -136,7 +145,8 @@ func (h *Handler) federation(w http.ResponseWriter, req *http.Request) {
continue
}
// Attach global labels if they do not exist yet.
for ln, lv := range h.externalLabels {
for _, ln := range externalLabelNames {
lv := externalLabels[ln]
if _, ok := globalUsed[ln]; !ok {
protMetric.Label = append(protMetric.Label, &dto.LabelPair{
Name: proto.String(string(ln)),

67
web/federate_test.go
View file

@ -59,72 +59,72 @@ var scenarios = map[string]struct {
params: "match[]=test_metric1",
code: 200,
body: `# TYPE test_metric1 untyped
test_metric1{foo="bar"} 10000 6000000
test_metric1{foo="boo"} 1 6000000
test_metric1{foo="bar",instance="i"} 10000 6000000
test_metric1{foo="boo",instance="i"} 1 6000000
`,
},
"test_metric2": {
params: "match[]=test_metric2",
code: 200,
body: `# TYPE test_metric2 untyped
test_metric2{foo="boo"} 1 6000000
test_metric2{foo="boo",instance="i"} 1 6000000
`,
},
"test_metric_without_labels": {
params: "match[]=test_metric_without_labels",
code: 200,
body: `# TYPE test_metric_without_labels untyped
test_metric_without_labels 1001 6000000
test_metric_without_labels{instance=""} 1001 6000000
`,
},
"{foo='boo'}": {
params: "match[]={foo='boo'}",
code: 200,
body: `# TYPE test_metric1 untyped
test_metric1{foo="boo"} 1 6000000
test_metric1{foo="boo",instance="i"} 1 6000000
# TYPE test_metric2 untyped
test_metric2{foo="boo"} 1 6000000
test_metric2{foo="boo",instance="i"} 1 6000000
`,
},
"two matchers": {
params: "match[]=test_metric1&match[]=test_metric2",
code: 200,
body: `# TYPE test_metric1 untyped
test_metric1{foo="bar"} 10000 6000000
test_metric1{foo="boo"} 1 6000000
test_metric1{foo="bar",instance="i"} 10000 6000000
test_metric1{foo="boo",instance="i"} 1 6000000
# TYPE test_metric2 untyped
test_metric2{foo="boo"} 1 6000000
test_metric2{foo="boo",instance="i"} 1 6000000
`,
},
"everything": {
params: "match[]={__name__=~'.%2b'}", // '%2b' is an URL-encoded '+'.
code: 200,
body: `# TYPE test_metric1 untyped
test_metric1{foo="bar"} 10000 6000000
test_metric1{foo="boo"} 1 6000000
test_metric1{foo="bar",instance="i"} 10000 6000000
test_metric1{foo="boo",instance="i"} 1 6000000
# TYPE test_metric2 untyped
test_metric2{foo="boo"} 1 6000000
test_metric2{foo="boo",instance="i"} 1 6000000
# TYPE test_metric_without_labels untyped
test_metric_without_labels 1001 6000000
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
test_metric_without_labels 1001 6000000
test_metric_without_labels{instance=""} 1001 6000000
`,
},
"empty label value for a label that doesn't exist at all, matches everything": {
params: "match[]={bar='',__name__=~'.%2b'}",
code: 200,
body: `# TYPE test_metric1 untyped
test_metric1{foo="bar"} 10000 6000000
test_metric1{foo="boo"} 1 6000000
test_metric1{foo="bar",instance="i"} 10000 6000000
test_metric1{foo="boo",instance="i"} 1 6000000
# TYPE test_metric2 untyped
test_metric2{foo="boo"} 1 6000000
test_metric2{foo="boo",instance="i"} 1 6000000
# TYPE test_metric_without_labels untyped
test_metric_without_labels 1001 6000000
test_metric_without_labels{instance=""} 1001 6000000
`,
},
"external labels are added if not already present": {
@ -132,12 +132,27 @@ test_metric_without_labels 1001 6000000
externalLabels: model.LabelSet{"zone": "ie", "foo": "baz"},
code: 200,
body: `# TYPE test_metric1 untyped
test_metric1{foo="bar",zone="ie"} 10000 6000000
test_metric1{foo="boo",zone="ie"} 1 6000000
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",zone="ie"} 1 6000000
test_metric2{foo="boo",instance="i",zone="ie"} 1 6000000
# TYPE test_metric_without_labels untyped
test_metric_without_labels{zone="ie",foo="baz"} 1001 6000000
test_metric_without_labels{foo="baz",instance="",zone="ie"} 1001 6000000
`,
},
"instance is an external label": {
// This makes no sense as a configuration, but we should
// know what it does anyway.
params: "match[]={__name__=~'.%2b'}", // '%2b' is an URL-encoded '+'.
externalLabels: model.LabelSet{"instance": "baz"},
code: 200,
body: `# TYPE test_metric1 untyped
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_without_labels untyped
test_metric_without_labels{instance="baz"} 1001 6000000
`,
},
}
@ -145,9 +160,9 @@ test_metric_without_labels{zone="ie",foo="baz"} 1001 6000000
func TestFederation(t *testing.T) {
suite, err := promql.NewTest(t, `
load 1m
test_metric1{foo="bar"} 0+100x100
test_metric1{foo="boo"} 1+0x100
test_metric2{foo="boo"} 1+0x100
test_metric1{foo="bar",instance="i"} 0+100x100
test_metric1{foo="boo",instance="i"} 1+0x100
test_metric2{foo="boo",instance="i"} 1+0x100
test_metric_without_labels 1+10x100
`)
if err != nil {
@ -189,7 +204,7 @@ func TestFederation(t *testing.T) {
t.Errorf("Scenario %q: got code %d, want %d", name, got, want)
}
if got, want := normalizeBody(res.Body), scenario.body; got != want {
t.Errorf("Scenario %q: got body %q, want %q", name, got, want)
t.Errorf("Scenario %q: got body %s, want %s", name, got, want)
}
}
}