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301 lines
8.8 KiB
301 lines
8.8 KiB
// 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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"bytes"
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"context"
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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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"time"
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"github.com/pkg/errors"
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"github.com/prometheus/common/model"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/pkg/labels"
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"github.com/prometheus/prometheus/promql"
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"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/tsdb"
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)
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var scenarios = map[string]struct {
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params string
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externalLabels labels.Labels
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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: `1:1: parse error: unexpected <op:->
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`,
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},
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"invalid params somewhere 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: `1:4: parse error: unexpected <op:->
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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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"test_stale_metric": {
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params: "match[]=test_metric_stale",
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code: 200,
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body: ``,
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},
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"test_old_metric": {
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params: "match[]=test_metric_old",
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code: 200,
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body: `# TYPE test_metric_old untyped
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test_metric_old{instance=""} 981 5880000
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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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"two matchers with overlap": {
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params: "match[]={__name__=~'test_metric1'}&match[]={foo='bar'}",
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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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"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_old untyped
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test_metric_old{instance=""} 981 5880000
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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_old untyped
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test_metric_old{instance=""} 981 5880000
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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 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_old untyped
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test_metric_old{instance=""} 981 5880000
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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: labels.Labels{{Name: "zone", Value: "ie"}, {Name: "foo", Value: "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_old untyped
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test_metric_old{foo="baz",instance="",zone="ie"} 981 5880000
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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: labels.Labels{{Name: "instance", Value: "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_old untyped
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test_metric_old{instance="baz"} 981 5880000
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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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test_metric_stale 1+10x99 stale
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test_metric_old 1+10x98
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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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localStorage: &dbAdapter{suite.TSDB()},
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lookbackDelta: 5 * time.Minute,
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now: func() model.Time { return 101 * 60 * 1000 }, // 101min after epoch.
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config: &config.Config{
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GlobalConfig: config.GlobalConfig{},
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},
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}
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for name, scenario := range scenarios {
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t.Run(name, func(t *testing.T) {
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h.config.GlobalConfig.ExternalLabels = scenario.externalLabels
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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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require.Equal(t, scenario.code, res.Code)
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require.Equal(t, scenario.body, normalizeBody(res.Body))
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})
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}
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}
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type notReadyReadStorage struct {
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LocalStorage
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}
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func (notReadyReadStorage) Querier(context.Context, int64, int64) (storage.Querier, error) {
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return nil, errors.Wrap(tsdb.ErrNotReady, "wrap")
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}
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func (notReadyReadStorage) StartTime() (int64, error) {
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return 0, errors.Wrap(tsdb.ErrNotReady, "wrap")
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}
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func (notReadyReadStorage) Stats(string) (*tsdb.Stats, error) {
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return nil, errors.Wrap(tsdb.ErrNotReady, "wrap")
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}
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// Regression test for https://github.com/prometheus/prometheus/issues/7181.
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func TestFederation_NotReady(t *testing.T) {
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h := &Handler{
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localStorage: notReadyReadStorage{},
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lookbackDelta: 5 * time.Minute,
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now: func() model.Time { return 101 * 60 * 1000 }, // 101min after epoch.
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config: &config.Config{
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GlobalConfig: config.GlobalConfig{},
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},
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}
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for name, scenario := range scenarios {
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t.Run(name, func(t *testing.T) {
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h.config.GlobalConfig.ExternalLabels = scenario.externalLabels
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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 scenario.code == http.StatusBadRequest {
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// Request are expected to be checked before DB readiness.
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require.Equal(t, http.StatusBadRequest, res.Code)
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return
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}
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require.Equal(t, http.StatusServiceUnavailable, res.Code)
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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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