243 lines
7.2 KiB
Go
243 lines
7.2 KiB
Go
// Copyright 2016 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.
|
|
|
|
package web
|
|
|
|
import (
|
|
"bytes"
|
|
"net/http/httptest"
|
|
"sort"
|
|
"strings"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/prometheus/common/model"
|
|
"github.com/prometheus/prometheus/config"
|
|
"github.com/prometheus/prometheus/pkg/labels"
|
|
"github.com/prometheus/prometheus/promql"
|
|
)
|
|
|
|
var scenarios = map[string]struct {
|
|
params string
|
|
externalLabels labels.Labels
|
|
code int
|
|
body string
|
|
}{
|
|
"empty": {
|
|
params: "",
|
|
code: 200,
|
|
body: ``,
|
|
},
|
|
"match nothing": {
|
|
params: "match[]=does_not_match_anything",
|
|
code: 200,
|
|
body: ``,
|
|
},
|
|
"invalid params from the beginning": {
|
|
params: "match[]=-not-a-valid-metric-name",
|
|
code: 400,
|
|
body: `1:1: parse error: unexpected <op:->
|
|
`,
|
|
},
|
|
"invalid params somewhere in the middle": {
|
|
params: "match[]=not-a-valid-metric-name",
|
|
code: 400,
|
|
body: `1:4: parse error: unexpected <op:->
|
|
`,
|
|
},
|
|
"test_metric1": {
|
|
params: "match[]=test_metric1",
|
|
code: 200,
|
|
body: `# TYPE test_metric1 untyped
|
|
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",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{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'}": {
|
|
params: "match[]={foo='boo'}",
|
|
code: 200,
|
|
body: `# TYPE test_metric1 untyped
|
|
test_metric1{foo="boo",instance="i"} 1 6000000
|
|
# TYPE test_metric2 untyped
|
|
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",instance="i"} 10000 6000000
|
|
test_metric1{foo="boo",instance="i"} 1 6000000
|
|
# TYPE test_metric2 untyped
|
|
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",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
|
|
`,
|
|
},
|
|
"empty label value matches everything that doesn't have that label": {
|
|
params: "match[]={foo='',__name__=~'.%2b'}",
|
|
code: 200,
|
|
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
|
|
`,
|
|
},
|
|
"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",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
|
|
`,
|
|
},
|
|
"external labels are added if not already present": {
|
|
params: "match[]={__name__=~'.%2b'}", // '%2b' is an URL-encoded '+'.
|
|
externalLabels: labels.Labels{{Name: "zone", Value: "ie"}, {Name: "foo", Value: "baz"}},
|
|
code: 200,
|
|
body: `# TYPE test_metric1 untyped
|
|
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
|
|
`,
|
|
},
|
|
"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: labels.Labels{{Name: "instance", Value: "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_old untyped
|
|
test_metric_old{instance="baz"} 981 5880000
|
|
# TYPE test_metric_without_labels untyped
|
|
test_metric_without_labels{instance="baz"} 1001 6000000
|
|
`,
|
|
},
|
|
}
|
|
|
|
func TestFederation(t *testing.T) {
|
|
suite, err := promql.NewTest(t, `
|
|
load 1m
|
|
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
|
|
test_metric_stale 1+10x99 stale
|
|
test_metric_old 1+10x98
|
|
`)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer suite.Close()
|
|
|
|
if err := suite.Run(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
h := &Handler{
|
|
localStorage: suite.Storage(),
|
|
lookbackDelta: 5 * time.Minute,
|
|
now: func() model.Time { return 101 * 60 * 1000 }, // 101min after epoch.
|
|
config: &config.Config{
|
|
GlobalConfig: config.GlobalConfig{},
|
|
},
|
|
}
|
|
|
|
for name, scenario := range scenarios {
|
|
h.config.GlobalConfig.ExternalLabels = scenario.externalLabels
|
|
req := httptest.NewRequest("GET", "http://example.org/federate?"+scenario.params, nil)
|
|
res := httptest.NewRecorder()
|
|
h.federation(res, req)
|
|
if got, want := res.Code, scenario.code; got != want {
|
|
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\n%s\n, want\n%s\n", name, got, want)
|
|
}
|
|
}
|
|
}
|
|
|
|
// normalizeBody sorts the lines within a metric to make it easy to verify the body.
|
|
// (Federation is not taking care of sorting within a metric family.)
|
|
func normalizeBody(body *bytes.Buffer) string {
|
|
var (
|
|
lines []string
|
|
lastHash int
|
|
)
|
|
for line, err := body.ReadString('\n'); err == nil; line, err = body.ReadString('\n') {
|
|
if line[0] == '#' && len(lines) > 0 {
|
|
sort.Strings(lines[lastHash+1:])
|
|
lastHash = len(lines)
|
|
}
|
|
lines = append(lines, line)
|
|
}
|
|
if len(lines) > 0 {
|
|
sort.Strings(lines[lastHash+1:])
|
|
}
|
|
return strings.Join(lines, "")
|
|
}
|