forked from mirror/client_golang
778 lines
21 KiB
Go
778 lines
21 KiB
Go
// Copyright 2014 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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// Copyright (c) 2013, The Prometheus Authors
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// All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license that can be found
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// in the LICENSE file.
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package prometheus_test
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import (
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"bytes"
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"net/http"
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"net/http/httptest"
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"testing"
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dto "github.com/prometheus/client_model/go"
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"github.com/golang/protobuf/proto"
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"github.com/prometheus/common/expfmt"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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// uncheckedCollector wraps a Collector but its Describe method yields no Desc.
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type uncheckedCollector struct {
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c prometheus.Collector
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}
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func (u uncheckedCollector) Describe(_ chan<- *prometheus.Desc) {}
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func (u uncheckedCollector) Collect(c chan<- prometheus.Metric) {
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u.c.Collect(c)
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}
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func testHandler(t testing.TB) {
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// TODO(beorn7): This test is a bit too "end-to-end". It tests quite a
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// few moving parts that are not strongly coupled. They could/should be
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// tested separately. However, the changes planned for v0.10 will
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// require a major rework of this test anyway, at which time I will
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// structure it in a better way.
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metricVec := prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Name: "name",
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Help: "docstring",
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ConstLabels: prometheus.Labels{"constname": "constvalue"},
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},
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[]string{"labelname"},
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)
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metricVec.WithLabelValues("val1").Inc()
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metricVec.WithLabelValues("val2").Inc()
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externalMetricFamily := &dto.MetricFamily{
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Name: proto.String("externalname"),
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Help: proto.String("externaldocstring"),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Label: []*dto.LabelPair{
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{
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Name: proto.String("externalconstname"),
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Value: proto.String("externalconstvalue"),
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},
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{
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Name: proto.String("externallabelname"),
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Value: proto.String("externalval1"),
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},
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},
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Counter: &dto.Counter{
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Value: proto.Float64(1),
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},
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},
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},
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}
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externalBuf := &bytes.Buffer{}
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enc := expfmt.NewEncoder(externalBuf, expfmt.FmtProtoDelim)
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if err := enc.Encode(externalMetricFamily); err != nil {
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t.Fatal(err)
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}
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externalMetricFamilyAsBytes := externalBuf.Bytes()
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externalMetricFamilyAsText := []byte(`# HELP externalname externaldocstring
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# TYPE externalname counter
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externalname{externalconstname="externalconstvalue",externallabelname="externalval1"} 1
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`)
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externalMetricFamilyAsProtoText := []byte(`name: "externalname"
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help: "externaldocstring"
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type: COUNTER
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metric: <
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label: <
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name: "externalconstname"
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value: "externalconstvalue"
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>
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label: <
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name: "externallabelname"
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value: "externalval1"
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>
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counter: <
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value: 1
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>
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>
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`)
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externalMetricFamilyAsProtoCompactText := []byte(`name:"externalname" help:"externaldocstring" type:COUNTER metric:<label:<name:"externalconstname" value:"externalconstvalue" > label:<name:"externallabelname" value:"externalval1" > counter:<value:1 > >
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`)
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expectedMetricFamily := &dto.MetricFamily{
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Name: proto.String("name"),
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Help: proto.String("docstring"),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Label: []*dto.LabelPair{
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{
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Name: proto.String("constname"),
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Value: proto.String("constvalue"),
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},
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{
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Name: proto.String("labelname"),
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Value: proto.String("val1"),
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},
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},
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Counter: &dto.Counter{
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Value: proto.Float64(1),
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},
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},
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{
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Label: []*dto.LabelPair{
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{
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Name: proto.String("constname"),
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Value: proto.String("constvalue"),
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},
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{
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Name: proto.String("labelname"),
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Value: proto.String("val2"),
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},
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},
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Counter: &dto.Counter{
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Value: proto.Float64(1),
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},
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},
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},
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}
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buf := &bytes.Buffer{}
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enc = expfmt.NewEncoder(buf, expfmt.FmtProtoDelim)
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if err := enc.Encode(expectedMetricFamily); err != nil {
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t.Fatal(err)
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}
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expectedMetricFamilyAsBytes := buf.Bytes()
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expectedMetricFamilyAsText := []byte(`# HELP name docstring
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# TYPE name counter
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name{constname="constvalue",labelname="val1"} 1
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name{constname="constvalue",labelname="val2"} 1
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`)
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expectedMetricFamilyAsProtoText := []byte(`name: "name"
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help: "docstring"
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type: COUNTER
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metric: <
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label: <
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name: "constname"
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value: "constvalue"
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>
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label: <
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name: "labelname"
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value: "val1"
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>
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counter: <
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value: 1
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>
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>
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metric: <
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label: <
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name: "constname"
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value: "constvalue"
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>
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label: <
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name: "labelname"
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value: "val2"
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>
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counter: <
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value: 1
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>
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>
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`)
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expectedMetricFamilyAsProtoCompactText := []byte(`name:"name" help:"docstring" type:COUNTER metric:<label:<name:"constname" value:"constvalue" > label:<name:"labelname" value:"val1" > counter:<value:1 > > metric:<label:<name:"constname" value:"constvalue" > label:<name:"labelname" value:"val2" > counter:<value:1 > >
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`)
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externalMetricFamilyWithSameName := &dto.MetricFamily{
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Name: proto.String("name"),
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Help: proto.String("docstring"),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Label: []*dto.LabelPair{
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{
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Name: proto.String("constname"),
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Value: proto.String("constvalue"),
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},
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{
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Name: proto.String("labelname"),
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Value: proto.String("different_val"),
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},
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},
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Counter: &dto.Counter{
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Value: proto.Float64(42),
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},
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},
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},
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}
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expectedMetricFamilyMergedWithExternalAsProtoCompactText := []byte(`name:"name" help:"docstring" type:COUNTER metric:<label:<name:"constname" value:"constvalue" > label:<name:"labelname" value:"different_val" > counter:<value:42 > > metric:<label:<name:"constname" value:"constvalue" > label:<name:"labelname" value:"val1" > counter:<value:1 > > metric:<label:<name:"constname" value:"constvalue" > label:<name:"labelname" value:"val2" > counter:<value:1 > >
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`)
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externalMetricFamilyWithInvalidLabelValue := &dto.MetricFamily{
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Name: proto.String("name"),
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Help: proto.String("docstring"),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Label: []*dto.LabelPair{
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{
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Name: proto.String("constname"),
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Value: proto.String("\xFF"),
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},
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{
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Name: proto.String("labelname"),
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Value: proto.String("different_val"),
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},
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},
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Counter: &dto.Counter{
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Value: proto.Float64(42),
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},
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},
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},
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}
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expectedMetricFamilyInvalidLabelValueAsText := []byte(`An error has occurred during metrics gathering:
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collected metric "name" { label:<name:"constname" value:"\377" > label:<name:"labelname" value:"different_val" > counter:<value:42 > } has a label named "constname" whose value is not utf8: "\xff"
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`)
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summary := prometheus.NewSummary(prometheus.SummaryOpts{
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Name: "complex",
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Help: "A metric to check collisions with _sum and _count.",
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})
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summaryAsText := []byte(`# HELP complex A metric to check collisions with _sum and _count.
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# TYPE complex summary
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complex{quantile="0.5"} NaN
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complex{quantile="0.9"} NaN
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complex{quantile="0.99"} NaN
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complex_sum 0
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complex_count 0
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`)
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histogram := prometheus.NewHistogram(prometheus.HistogramOpts{
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Name: "complex",
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Help: "A metric to check collisions with _sun, _count, and _bucket.",
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})
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externalMetricFamilyWithBucketSuffix := &dto.MetricFamily{
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Name: proto.String("complex_bucket"),
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Help: proto.String("externaldocstring"),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Counter: &dto.Counter{
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Value: proto.Float64(1),
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},
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},
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},
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}
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externalMetricFamilyWithBucketSuffixAsText := []byte(`# HELP complex_bucket externaldocstring
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# TYPE complex_bucket counter
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complex_bucket 1
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`)
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externalMetricFamilyWithCountSuffix := &dto.MetricFamily{
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Name: proto.String("complex_count"),
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Help: proto.String("externaldocstring"),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Counter: &dto.Counter{
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Value: proto.Float64(1),
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},
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},
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},
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}
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bucketCollisionMsg := []byte(`An error has occurred during metrics gathering:
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collected metric named "complex_bucket" collides with previously collected histogram named "complex"
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`)
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summaryCountCollisionMsg := []byte(`An error has occurred during metrics gathering:
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collected metric named "complex_count" collides with previously collected summary named "complex"
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`)
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histogramCountCollisionMsg := []byte(`An error has occurred during metrics gathering:
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collected metric named "complex_count" collides with previously collected histogram named "complex"
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`)
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externalMetricFamilyWithDuplicateLabel := &dto.MetricFamily{
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Name: proto.String("broken_metric"),
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Help: proto.String("The registry should detect the duplicate label."),
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Type: dto.MetricType_COUNTER.Enum(),
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Metric: []*dto.Metric{
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{
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Label: []*dto.LabelPair{
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{
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Name: proto.String("foo"),
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Value: proto.String("bar"),
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},
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{
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Name: proto.String("foo"),
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Value: proto.String("baz"),
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},
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},
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Counter: &dto.Counter{
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Value: proto.Float64(2.7),
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},
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},
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},
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}
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duplicateLabelMsg := []byte(`duplicate label mumble mumble`)
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type output struct {
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headers map[string]string
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body []byte
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}
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var scenarios = []struct {
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headers map[string]string
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out output
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collector prometheus.Collector
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externalMF []*dto.MetricFamily
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}{
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{ // 0
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headers: map[string]string{
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"Accept": "foo/bar;q=0.2, dings/bums;q=0.8",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
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},
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body: []byte{},
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},
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},
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{ // 1
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headers: map[string]string{
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"Accept": "foo/bar;q=0.2, application/quark;q=0.8",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
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},
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body: []byte{},
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},
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},
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{ // 2
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headers: map[string]string{
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"Accept": "foo/bar;q=0.2, application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=bla;q=0.8",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
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},
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body: []byte{},
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},
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},
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{ // 3
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headers: map[string]string{
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"Accept": "text/plain;q=0.2, application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=delimited;q=0.8",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=delimited`,
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},
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body: []byte{},
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},
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},
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{ // 4
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headers: map[string]string{
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"Accept": "application/json",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
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},
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body: expectedMetricFamilyAsText,
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},
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collector: metricVec,
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},
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{ // 5
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headers: map[string]string{
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"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=delimited",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=delimited`,
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},
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body: expectedMetricFamilyAsBytes,
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},
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collector: metricVec,
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},
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{ // 6
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headers: map[string]string{
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"Accept": "application/json",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
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},
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body: externalMetricFamilyAsText,
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},
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externalMF: []*dto.MetricFamily{externalMetricFamily},
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},
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{ // 7
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headers: map[string]string{
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"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=delimited",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=delimited`,
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},
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body: externalMetricFamilyAsBytes,
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},
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externalMF: []*dto.MetricFamily{externalMetricFamily},
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},
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{ // 8
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headers: map[string]string{
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"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=delimited",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=delimited`,
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},
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body: bytes.Join(
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[][]byte{
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externalMetricFamilyAsBytes,
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expectedMetricFamilyAsBytes,
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},
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[]byte{},
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),
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},
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collector: metricVec,
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externalMF: []*dto.MetricFamily{externalMetricFamily},
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},
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{ // 9
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headers: map[string]string{
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"Accept": "text/plain",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
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},
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body: []byte{},
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},
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},
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{ // 10
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headers: map[string]string{
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"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=bla;q=0.2, text/plain;q=0.5",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
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},
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body: expectedMetricFamilyAsText,
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},
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collector: metricVec,
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},
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{ // 11
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headers: map[string]string{
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"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=bla;q=0.2, text/plain;q=0.5;version=0.0.4",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
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},
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body: bytes.Join(
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[][]byte{
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externalMetricFamilyAsText,
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expectedMetricFamilyAsText,
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},
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[]byte{},
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),
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},
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collector: metricVec,
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externalMF: []*dto.MetricFamily{externalMetricFamily},
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},
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{ // 12
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headers: map[string]string{
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"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=delimited;q=0.2, text/plain;q=0.5;version=0.0.2",
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},
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out: output{
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headers: map[string]string{
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"Content-Type": `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=delimited`,
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},
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body: bytes.Join(
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[][]byte{
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externalMetricFamilyAsBytes,
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expectedMetricFamilyAsBytes,
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},
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[]byte{},
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),
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},
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collector: metricVec,
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externalMF: []*dto.MetricFamily{externalMetricFamily},
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},
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{ // 13
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headers: map[string]string{
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"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=text;q=0.5, application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=delimited;q=0.4",
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},
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out: output{
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headers: map[string]string{
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|
"Content-Type": `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=text`,
|
|
},
|
|
body: bytes.Join(
|
|
[][]byte{
|
|
externalMetricFamilyAsProtoText,
|
|
expectedMetricFamilyAsProtoText,
|
|
},
|
|
[]byte{},
|
|
),
|
|
},
|
|
collector: metricVec,
|
|
externalMF: []*dto.MetricFamily{externalMetricFamily},
|
|
},
|
|
{ // 14
|
|
headers: map[string]string{
|
|
"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=compact-text",
|
|
},
|
|
out: output{
|
|
headers: map[string]string{
|
|
"Content-Type": `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=compact-text`,
|
|
},
|
|
body: bytes.Join(
|
|
[][]byte{
|
|
externalMetricFamilyAsProtoCompactText,
|
|
expectedMetricFamilyAsProtoCompactText,
|
|
},
|
|
[]byte{},
|
|
),
|
|
},
|
|
collector: metricVec,
|
|
externalMF: []*dto.MetricFamily{externalMetricFamily},
|
|
},
|
|
{ // 15
|
|
headers: map[string]string{
|
|
"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=compact-text",
|
|
},
|
|
out: output{
|
|
headers: map[string]string{
|
|
"Content-Type": `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=compact-text`,
|
|
},
|
|
body: bytes.Join(
|
|
[][]byte{
|
|
externalMetricFamilyAsProtoCompactText,
|
|
expectedMetricFamilyMergedWithExternalAsProtoCompactText,
|
|
},
|
|
[]byte{},
|
|
),
|
|
},
|
|
collector: metricVec,
|
|
externalMF: []*dto.MetricFamily{
|
|
externalMetricFamily,
|
|
externalMetricFamilyWithSameName,
|
|
},
|
|
},
|
|
{ // 16
|
|
headers: map[string]string{
|
|
"Accept": "application/vnd.google.protobuf;proto=io.prometheus.client.MetricFamily;encoding=compact-text",
|
|
},
|
|
out: output{
|
|
headers: map[string]string{
|
|
"Content-Type": `text/plain; charset=utf-8`,
|
|
},
|
|
body: expectedMetricFamilyInvalidLabelValueAsText,
|
|
},
|
|
collector: metricVec,
|
|
externalMF: []*dto.MetricFamily{
|
|
externalMetricFamily,
|
|
externalMetricFamilyWithInvalidLabelValue,
|
|
},
|
|
},
|
|
{ // 17
|
|
headers: map[string]string{
|
|
"Accept": "text/plain",
|
|
},
|
|
out: output{
|
|
headers: map[string]string{
|
|
"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
|
|
},
|
|
body: expectedMetricFamilyAsText,
|
|
},
|
|
collector: uncheckedCollector{metricVec},
|
|
},
|
|
{ // 18
|
|
headers: map[string]string{
|
|
"Accept": "text/plain",
|
|
},
|
|
out: output{
|
|
headers: map[string]string{
|
|
"Content-Type": `text/plain; charset=utf-8`,
|
|
},
|
|
body: histogramCountCollisionMsg,
|
|
},
|
|
collector: histogram,
|
|
externalMF: []*dto.MetricFamily{
|
|
externalMetricFamilyWithCountSuffix,
|
|
},
|
|
},
|
|
{ // 19
|
|
headers: map[string]string{
|
|
"Accept": "text/plain",
|
|
},
|
|
out: output{
|
|
headers: map[string]string{
|
|
"Content-Type": `text/plain; charset=utf-8`,
|
|
},
|
|
body: bucketCollisionMsg,
|
|
},
|
|
collector: histogram,
|
|
externalMF: []*dto.MetricFamily{
|
|
externalMetricFamilyWithBucketSuffix,
|
|
},
|
|
},
|
|
{ // 20
|
|
headers: map[string]string{
|
|
"Accept": "text/plain",
|
|
},
|
|
out: output{
|
|
headers: map[string]string{
|
|
"Content-Type": `text/plain; charset=utf-8`,
|
|
},
|
|
body: summaryCountCollisionMsg,
|
|
},
|
|
collector: summary,
|
|
externalMF: []*dto.MetricFamily{
|
|
externalMetricFamilyWithCountSuffix,
|
|
},
|
|
},
|
|
{ // 21
|
|
headers: map[string]string{
|
|
"Accept": "text/plain",
|
|
},
|
|
out: output{
|
|
headers: map[string]string{
|
|
"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
|
|
},
|
|
body: bytes.Join(
|
|
[][]byte{
|
|
summaryAsText,
|
|
externalMetricFamilyWithBucketSuffixAsText,
|
|
},
|
|
[]byte{},
|
|
),
|
|
},
|
|
collector: summary,
|
|
externalMF: []*dto.MetricFamily{
|
|
externalMetricFamilyWithBucketSuffix,
|
|
},
|
|
},
|
|
{ // 22
|
|
headers: map[string]string{
|
|
"Accept": "text/plain",
|
|
},
|
|
out: output{
|
|
headers: map[string]string{
|
|
"Content-Type": `text/plain; version=0.0.4; charset=utf-8`,
|
|
},
|
|
body: duplicateLabelMsg,
|
|
},
|
|
externalMF: []*dto.MetricFamily{
|
|
externalMetricFamilyWithDuplicateLabel,
|
|
},
|
|
},
|
|
}
|
|
for i, scenario := range scenarios {
|
|
registry := prometheus.NewPedanticRegistry()
|
|
gatherer := prometheus.Gatherer(registry)
|
|
if scenario.externalMF != nil {
|
|
gatherer = prometheus.Gatherers{
|
|
registry,
|
|
prometheus.GathererFunc(func() ([]*dto.MetricFamily, error) {
|
|
return scenario.externalMF, nil
|
|
}),
|
|
}
|
|
}
|
|
|
|
if scenario.collector != nil {
|
|
registry.MustRegister(scenario.collector)
|
|
}
|
|
writer := httptest.NewRecorder()
|
|
handler := prometheus.InstrumentHandler("prometheus", promhttp.HandlerFor(gatherer, promhttp.HandlerOpts{}))
|
|
request, _ := http.NewRequest("GET", "/", nil)
|
|
for key, value := range scenario.headers {
|
|
request.Header.Add(key, value)
|
|
}
|
|
handler(writer, request)
|
|
|
|
for key, value := range scenario.out.headers {
|
|
if writer.Header().Get(key) != value {
|
|
t.Errorf(
|
|
"%d. expected %q for header %q, got %q",
|
|
i, value, key, writer.Header().Get(key),
|
|
)
|
|
}
|
|
}
|
|
|
|
if !bytes.Equal(scenario.out.body, writer.Body.Bytes()) {
|
|
t.Errorf(
|
|
"%d. expected body:\n%s\ngot body:\n%s\n",
|
|
i, scenario.out.body, writer.Body.Bytes(),
|
|
)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestHandler(t *testing.T) {
|
|
testHandler(t)
|
|
}
|
|
|
|
func BenchmarkHandler(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
testHandler(b)
|
|
}
|
|
}
|
|
|
|
func TestRegisterWithOrGet(t *testing.T) {
|
|
// Replace the default registerer just to be sure. This is bad, but this
|
|
// whole test will go away once RegisterOrGet is removed.
|
|
oldRegisterer := prometheus.DefaultRegisterer
|
|
defer func() {
|
|
prometheus.DefaultRegisterer = oldRegisterer
|
|
}()
|
|
prometheus.DefaultRegisterer = prometheus.NewRegistry()
|
|
original := prometheus.NewCounterVec(
|
|
prometheus.CounterOpts{
|
|
Name: "test",
|
|
Help: "help",
|
|
},
|
|
[]string{"foo", "bar"},
|
|
)
|
|
equalButNotSame := prometheus.NewCounterVec(
|
|
prometheus.CounterOpts{
|
|
Name: "test",
|
|
Help: "help",
|
|
},
|
|
[]string{"foo", "bar"},
|
|
)
|
|
var err error
|
|
if err = prometheus.Register(original); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err = prometheus.Register(equalButNotSame); err == nil {
|
|
t.Fatal("expected error when registringe equal collector")
|
|
}
|
|
if are, ok := err.(prometheus.AlreadyRegisteredError); ok {
|
|
if are.ExistingCollector != original {
|
|
t.Error("expected original collector but got something else")
|
|
}
|
|
if are.ExistingCollector == equalButNotSame {
|
|
t.Error("expected original callector but got new one")
|
|
}
|
|
} else {
|
|
t.Error("unexpected error:", err)
|
|
}
|
|
}
|