prometheus/documentation/examples/custom-sd/adapter/adapter_test.go

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// Copyright 2018 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 adapter
import (
"context"
"os"
"testing"
"github.com/prometheus/common/model"
"github.com/stretchr/testify/require"
"github.com/prometheus/prometheus/discovery/targetgroup"
)
// TestGenerateTargetGroups checks that the target is correctly generated.
// It covers the case when the target is empty.
func TestGenerateTargetGroups(t *testing.T) {
testCases := []struct {
title string
targetGroup map[string][]*targetgroup.Group
expectedCustomSD map[string]*customSD
}{
{
title: "Empty targetGroup",
targetGroup: map[string][]*targetgroup.Group{
"customSD": {
{
Source: "Consul",
},
{
Source: "Kubernetes",
},
},
},
expectedCustomSD: map[string]*customSD{
"customSD:Consul:0000000000000000": {
Targets: []string{},
Labels: map[string]string{},
},
"customSD:Kubernetes:0000000000000000": {
Targets: []string{},
Labels: map[string]string{},
},
},
},
{
title: "targetGroup filled",
targetGroup: map[string][]*targetgroup.Group{
"customSD": {
{
Source: "Azure",
Targets: []model.LabelSet{
{
model.AddressLabel: "host1",
},
{
model.AddressLabel: "host2",
},
},
Labels: model.LabelSet{
model.LabelName("__meta_test_label"): model.LabelValue("label_test_1"),
},
},
{
Source: "Openshift",
Targets: []model.LabelSet{
{
model.AddressLabel: "host3",
},
{
model.AddressLabel: "host4",
},
},
Labels: model.LabelSet{
model.LabelName("__meta_test_label"): model.LabelValue("label_test_2"),
},
},
},
},
expectedCustomSD: map[string]*customSD{
"customSD:Azure:282a007a18fadbbb": {
Targets: []string{
"host1",
"host2",
},
Labels: map[string]string{
"__meta_test_label": "label_test_1",
},
},
"customSD:Openshift:281c007a18ea2ad0": {
Targets: []string{
"host3",
"host4",
},
Labels: map[string]string{
"__meta_test_label": "label_test_2",
},
},
},
},
{
title: "Mixed between empty targetGroup and targetGroup filled",
targetGroup: map[string][]*targetgroup.Group{
"customSD": {
{
Source: "GCE",
Targets: []model.LabelSet{
{
model.AddressLabel: "host1",
},
{
model.AddressLabel: "host2",
},
},
Labels: model.LabelSet{
model.LabelName("__meta_test_label"): model.LabelValue("label_test_1"),
},
},
{
Source: "Kubernetes",
Labels: model.LabelSet{
model.LabelName("__meta_test_label"): model.LabelValue("label_test_2"),
},
},
},
},
expectedCustomSD: map[string]*customSD{
"customSD:GCE:282a007a18fadbbb": {
Targets: []string{
"host1",
"host2",
},
Labels: map[string]string{
"__meta_test_label": "label_test_1",
},
},
"customSD:Kubernetes:282e007a18fad483": {
Targets: []string{},
Labels: map[string]string{
"__meta_test_label": "label_test_2",
},
},
},
},
{
title: "Disordered Ips in Alibaba's application management system",
targetGroup: map[string][]*targetgroup.Group{
"cart": {
{
Source: "alibaba",
Targets: []model.LabelSet{
{
model.AddressLabel: "192.168.1.55",
},
{
model.AddressLabel: "192.168.1.44",
},
},
Labels: model.LabelSet{
model.LabelName("__meta_test_label"): model.LabelValue("label_test_1"),
},
},
},
"buy": {
{
Source: "alibaba",
Targets: []model.LabelSet{
{
model.AddressLabel: "192.168.1.22",
},
{
model.AddressLabel: "192.168.1.33",
},
},
Labels: model.LabelSet{
model.LabelName("__meta_test_label"): model.LabelValue("label_test_1"),
},
},
},
},
expectedCustomSD: map[string]*customSD{
"buy:alibaba:21c0d97a1e27e6fe": {
Targets: []string{
"192.168.1.22",
"192.168.1.33",
},
Labels: map[string]string{
"__meta_test_label": "label_test_1",
},
},
"cart:alibaba:1112e97a13b159fa": {
Targets: []string{
"192.168.1.44",
"192.168.1.55",
},
Labels: map[string]string{
"__meta_test_label": "label_test_1",
},
},
},
},
}
for _, testCase := range testCases {
result := generateTargetGroups(testCase.targetGroup)
require.Equal(t, testCase.expectedCustomSD, result)
}
}
// TestWriteOutput checks the adapter can write a file to disk.
func TestWriteOutput(t *testing.T) {
ctx := context.Background()
tmpfile, err := os.CreateTemp("", "sd_adapter_test")
require.NoError(t, err)
defer os.Remove(tmpfile.Name())
tmpfile.Close()
adapter := NewAdapter(ctx, tmpfile.Name(), "test_sd", nil, nil)
require.NoError(t, adapter.writeOutput())
}