231 lines
7.0 KiB
Go
231 lines
7.0 KiB
Go
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package web
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import (
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"bufio"
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"bytes"
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"net/http"
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"net/http/httptest"
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"sort"
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"strings"
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"testing"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/promql"
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)
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var scenarios = map[string]struct {
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params string
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accept string
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externalLabels model.LabelSet
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code int
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body string
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}{
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"empty": {
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params: "",
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code: 200,
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body: ``,
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},
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"match nothing": {
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params: "match[]=does_not_match_anything",
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code: 200,
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body: ``,
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},
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"invalid params from the beginning": {
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params: "match[]=-not-a-valid-metric-name",
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code: 400,
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body: `parse error at char 1: vector selector must contain label matchers or metric name
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`,
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},
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"invalid params somehwere in the middle": {
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params: "match[]=not-a-valid-metric-name",
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code: 400,
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body: `parse error at char 4: could not parse remaining input "-a-valid-metric"...
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`,
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},
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"test_metric1": {
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params: "match[]=test_metric1",
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code: 200,
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body: `# TYPE test_metric1 untyped
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test_metric1{foo="bar",instance="i"} 10000 6000000
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test_metric1{foo="boo",instance="i"} 1 6000000
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`,
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},
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"test_metric2": {
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params: "match[]=test_metric2",
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code: 200,
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body: `# TYPE test_metric2 untyped
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test_metric2{foo="boo",instance="i"} 1 6000000
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`,
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},
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"test_metric_without_labels": {
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params: "match[]=test_metric_without_labels",
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code: 200,
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body: `# TYPE test_metric_without_labels untyped
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test_metric_without_labels{instance=""} 1001 6000000
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`,
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},
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"{foo='boo'}": {
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params: "match[]={foo='boo'}",
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code: 200,
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body: `# TYPE test_metric1 untyped
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test_metric1{foo="boo",instance="i"} 1 6000000
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# TYPE test_metric2 untyped
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test_metric2{foo="boo",instance="i"} 1 6000000
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`,
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},
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"two matchers": {
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params: "match[]=test_metric1&match[]=test_metric2",
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code: 200,
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body: `# TYPE test_metric1 untyped
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test_metric1{foo="bar",instance="i"} 10000 6000000
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test_metric1{foo="boo",instance="i"} 1 6000000
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# TYPE test_metric2 untyped
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test_metric2{foo="boo",instance="i"} 1 6000000
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`,
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},
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"everything": {
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params: "match[]={__name__=~'.%2b'}", // '%2b' is an URL-encoded '+'.
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code: 200,
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body: `# TYPE test_metric1 untyped
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test_metric1{foo="bar",instance="i"} 10000 6000000
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test_metric1{foo="boo",instance="i"} 1 6000000
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# TYPE test_metric2 untyped
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test_metric2{foo="boo",instance="i"} 1 6000000
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# TYPE test_metric_without_labels untyped
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test_metric_without_labels{instance=""} 1001 6000000
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`,
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},
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"empty label value matches everything that doesn't have that label": {
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params: "match[]={foo='',__name__=~'.%2b'}",
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code: 200,
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body: `# TYPE test_metric_without_labels untyped
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test_metric_without_labels{instance=""} 1001 6000000
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`,
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},
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"empty label value for a label that doesn't exist at all, matches everything": {
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params: "match[]={bar='',__name__=~'.%2b'}",
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code: 200,
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body: `# TYPE test_metric1 untyped
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test_metric1{foo="bar",instance="i"} 10000 6000000
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test_metric1{foo="boo",instance="i"} 1 6000000
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# TYPE test_metric2 untyped
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test_metric2{foo="boo",instance="i"} 1 6000000
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# TYPE test_metric_without_labels untyped
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test_metric_without_labels{instance=""} 1001 6000000
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`,
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},
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"external labels are added if not already present": {
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params: "match[]={__name__=~'.%2b'}", // '%2b' is an URL-encoded '+'.
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externalLabels: model.LabelSet{"zone": "ie", "foo": "baz"},
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code: 200,
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body: `# TYPE test_metric1 untyped
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test_metric1{foo="bar",instance="i",zone="ie"} 10000 6000000
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test_metric1{foo="boo",instance="i",zone="ie"} 1 6000000
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# TYPE test_metric2 untyped
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test_metric2{foo="boo",instance="i",zone="ie"} 1 6000000
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# TYPE test_metric_without_labels untyped
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test_metric_without_labels{foo="baz",instance="",zone="ie"} 1001 6000000
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`,
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},
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"instance is an external label": {
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// This makes no sense as a configuration, but we should
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// know what it does anyway.
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params: "match[]={__name__=~'.%2b'}", // '%2b' is an URL-encoded '+'.
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externalLabels: model.LabelSet{"instance": "baz"},
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code: 200,
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body: `# TYPE test_metric1 untyped
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test_metric1{foo="bar",instance="i"} 10000 6000000
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test_metric1{foo="boo",instance="i"} 1 6000000
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# TYPE test_metric2 untyped
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test_metric2{foo="boo",instance="i"} 1 6000000
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# TYPE test_metric_without_labels untyped
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test_metric_without_labels{instance="baz"} 1001 6000000
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`,
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},
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}
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func TestFederation(t *testing.T) {
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suite, err := promql.NewTest(t, `
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load 1m
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test_metric1{foo="bar",instance="i"} 0+100x100
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test_metric1{foo="boo",instance="i"} 1+0x100
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test_metric2{foo="boo",instance="i"} 1+0x100
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test_metric_without_labels 1+10x100
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`)
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if err != nil {
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t.Fatal(err)
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}
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defer suite.Close()
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if err := suite.Run(); err != nil {
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t.Fatal(err)
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}
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h := &Handler{
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storage: suite.Storage(),
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queryEngine: suite.QueryEngine(),
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now: func() model.Time { return 101 * 60 * 1000 }, // 101min after epoch.
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}
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for name, scenario := range scenarios {
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h.externalLabels = scenario.externalLabels
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req, err := http.ReadRequest(bufio.NewReader(strings.NewReader(
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"GET http://example.org/federate?" + scenario.params + " HTTP/1.0\r\n\r\n",
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)))
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if err != nil {
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t.Fatal(err)
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}
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// HTTP/1.0 was used above to avoid needing a Host field. Change it to 1.1 here.
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req.Proto = "HTTP/1.1"
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req.ProtoMinor = 1
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req.Close = false
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// 192.0.2.0/24 is "TEST-NET" in RFC 5737 for use solely in
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// documentation and example source code and should not be
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// used publicly.
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req.RemoteAddr = "192.0.2.1:1234"
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// TODO(beorn7): Once we are completely on Go1.7, replace the lines above by the following:
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// req := httptest.NewRequest("GET", "http://example.org/federate?"+scenario.params, nil)
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res := httptest.NewRecorder()
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h.federation(res, req)
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if got, want := res.Code, scenario.code; got != want {
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t.Errorf("Scenario %q: got code %d, want %d", name, got, want)
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}
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if got, want := normalizeBody(res.Body), scenario.body; got != want {
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t.Errorf("Scenario %q: got body\n%s\n, want\n%s\n", name, got, want)
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}
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}
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}
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// normalizeBody sorts the lines within a metric to make it easy to verify the body.
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// (Federation is not taking care of sorting within a metric family.)
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func normalizeBody(body *bytes.Buffer) string {
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var (
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lines []string
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lastHash int
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)
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for line, err := body.ReadString('\n'); err == nil; line, err = body.ReadString('\n') {
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if line[0] == '#' && len(lines) > 0 {
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sort.Strings(lines[lastHash+1:])
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lastHash = len(lines)
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}
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lines = append(lines, line)
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}
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if len(lines) > 0 {
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sort.Strings(lines[lastHash+1:])
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}
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return strings.Join(lines, "")
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}
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