370 lines
10 KiB
Go
370 lines
10 KiB
Go
// Copyright 2015 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 consul
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import (
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"context"
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"testing"
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"time"
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"net/http"
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"net/http/httptest"
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"net/url"
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"github.com/go-kit/kit/log"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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"github.com/prometheus/prometheus/util/testutil"
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)
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func TestConfiguredService(t *testing.T) {
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conf := &SDConfig{
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Services: []string{"configuredServiceName"}}
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consulDiscovery, err := NewDiscovery(conf, nil)
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if err != nil {
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t.Errorf("Unexpected error when initializing discovery %v", err)
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}
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if !consulDiscovery.shouldWatch("configuredServiceName", []string{""}) {
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t.Errorf("Expected service %s to be watched", "configuredServiceName")
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}
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if consulDiscovery.shouldWatch("nonConfiguredServiceName", []string{""}) {
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t.Errorf("Expected service %s to not be watched", "nonConfiguredServiceName")
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}
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}
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func TestConfiguredServiceWithTag(t *testing.T) {
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conf := &SDConfig{
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Services: []string{"configuredServiceName"},
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ServiceTags: []string{"http"},
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}
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consulDiscovery, err := NewDiscovery(conf, nil)
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if err != nil {
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t.Errorf("Unexpected error when initializing discovery %v", err)
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}
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if consulDiscovery.shouldWatch("configuredServiceName", []string{""}) {
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t.Errorf("Expected service %s to not be watched without tag", "configuredServiceName")
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}
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if !consulDiscovery.shouldWatch("configuredServiceName", []string{"http"}) {
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t.Errorf("Expected service %s to be watched with tag %s", "configuredServiceName", "http")
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}
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if consulDiscovery.shouldWatch("nonConfiguredServiceName", []string{""}) {
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t.Errorf("Expected service %s to not be watched without tag", "nonConfiguredServiceName")
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}
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if consulDiscovery.shouldWatch("nonConfiguredServiceName", []string{"http"}) {
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t.Errorf("Expected service %s to not be watched with tag %s", "nonConfiguredServiceName", "http")
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}
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}
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func TestConfiguredServiceWithTags(t *testing.T) {
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type testcase struct {
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// What we've configured to watch.
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conf *SDConfig
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// The service we're checking if we should watch or not.
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serviceName string
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serviceTags []string
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shouldWatch bool
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}
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cases := []testcase{
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{
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conf: &SDConfig{
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Services: []string{"configuredServiceName"},
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ServiceTags: []string{"http", "v1"},
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},
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serviceName: "configuredServiceName",
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serviceTags: []string{""},
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shouldWatch: false,
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},
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{
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conf: &SDConfig{
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Services: []string{"configuredServiceName"},
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ServiceTags: []string{"http", "v1"},
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},
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serviceName: "configuredServiceName",
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serviceTags: []string{"http", "v1"},
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shouldWatch: true,
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},
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{
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conf: &SDConfig{
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Services: []string{"configuredServiceName"},
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ServiceTags: []string{"http", "v1"},
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},
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serviceName: "nonConfiguredServiceName",
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serviceTags: []string{""},
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shouldWatch: false,
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},
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{
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conf: &SDConfig{
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Services: []string{"configuredServiceName"},
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ServiceTags: []string{"http", "v1"},
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},
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serviceName: "nonConfiguredServiceName",
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serviceTags: []string{"http, v1"},
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shouldWatch: false,
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},
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{
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conf: &SDConfig{
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Services: []string{"configuredServiceName"},
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ServiceTags: []string{"http", "v1"},
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},
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serviceName: "configuredServiceName",
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serviceTags: []string{"http", "v1", "foo"},
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shouldWatch: true,
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},
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{
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conf: &SDConfig{
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Services: []string{"configuredServiceName"},
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ServiceTags: []string{"http", "v1", "foo"},
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},
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serviceName: "configuredServiceName",
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serviceTags: []string{"http", "v1", "foo"},
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shouldWatch: true,
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},
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{
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conf: &SDConfig{
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Services: []string{"configuredServiceName"},
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ServiceTags: []string{"http", "v1"},
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},
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serviceName: "configuredServiceName",
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serviceTags: []string{"http", "v1", "v1"},
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shouldWatch: true,
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},
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}
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for _, tc := range cases {
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consulDiscovery, err := NewDiscovery(tc.conf, nil)
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if err != nil {
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t.Errorf("Unexpected error when initializing discovery %v", err)
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}
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ret := consulDiscovery.shouldWatch(tc.serviceName, tc.serviceTags)
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if ret != tc.shouldWatch {
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t.Errorf("Expected should watch? %t, got %t. Watched service and tags: %s %+v, input was %s %+v", tc.shouldWatch, ret, tc.conf.Services, tc.conf.ServiceTags, tc.serviceName, tc.serviceTags)
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}
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}
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}
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func TestNonConfiguredService(t *testing.T) {
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conf := &SDConfig{}
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consulDiscovery, err := NewDiscovery(conf, nil)
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if err != nil {
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t.Errorf("Unexpected error when initializing discovery %v", err)
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}
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if !consulDiscovery.shouldWatch("nonConfiguredServiceName", []string{""}) {
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t.Errorf("Expected service %s to be watched", "nonConfiguredServiceName")
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}
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}
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const (
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AgentAnswer = `{"Config": {"Datacenter": "test-dc"}}`
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ServiceTestAnswer = `
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[{
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"Node": {
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"ID": "b78c2e48-5ef3-1814-31b8-0d880f50471e",
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"Node": "node1",
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"Address": "1.1.1.1",
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"Datacenter": "test-dc",
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"TaggedAddresses": {
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"lan": "192.168.10.10",
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"wan": "10.0.10.10"
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},
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"Meta": {"rack_name": "2304"},
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"CreateIndex": 1,
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"ModifyIndex": 1
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},
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"Service": {
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"ID": "test",
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"Service": "test",
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"Tags": ["tag1"],
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"Address": "",
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"Meta": {"version":"1.0.0","environment":"stagging"},
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"Port": 3341,
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"Weights": {
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"Passing": 1,
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"Warning": 1
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},
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"EnableTagOverride": false,
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"ProxyDestination": "",
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"Proxy": {},
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"Connect": {},
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"CreateIndex": 1,
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"ModifyIndex": 1
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},
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"Checks": [{
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"Node": "node1",
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"CheckID": "serfHealth",
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"Name": "Serf Health Status",
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"Status": "passing"
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}]
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}]`
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ServicesTestAnswer = `{"test": ["tag1"], "other": ["tag2"]}`
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)
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func newServer(t *testing.T) (*httptest.Server, *SDConfig) {
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// github.com/hashicorp/consul/testutil/ would be nice but it needs a local consul binary.
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stub := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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response := ""
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switch r.URL.String() {
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case "/v1/agent/self":
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response = AgentAnswer
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case "/v1/health/service/test?node-meta=rack_name%3A2304&stale=&tag=tag1&wait=600000ms":
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response = ServiceTestAnswer
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case "/v1/health/service/test?wait=600000ms":
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response = ServiceTestAnswer
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case "/v1/health/service/other?wait=600000ms":
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response = `[]`
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case "/v1/catalog/services?node-meta=rack_name%3A2304&stale=&wait=600000ms":
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response = ServicesTestAnswer
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case "/v1/catalog/services?wait=600000ms":
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response = ServicesTestAnswer
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case "/v1/catalog/services?index=1&node-meta=rack_name%3A2304&stale=&wait=600000ms":
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time.Sleep(5 * time.Second)
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response = ServicesTestAnswer
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case "/v1/catalog/services?index=1&wait=600000ms":
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time.Sleep(5 * time.Second)
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response = ServicesTestAnswer
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default:
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t.Errorf("Unhandled consul call: %s", r.URL)
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}
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w.Header().Add("X-Consul-Index", "1")
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w.Write([]byte(response))
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}))
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stuburl, err := url.Parse(stub.URL)
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testutil.Ok(t, err)
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config := &SDConfig{
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Server: stuburl.Host,
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Token: "fake-token",
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RefreshInterval: model.Duration(1 * time.Second),
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}
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return stub, config
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}
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func newDiscovery(t *testing.T, config *SDConfig) *Discovery {
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logger := log.NewNopLogger()
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d, err := NewDiscovery(config, logger)
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testutil.Ok(t, err)
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return d
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}
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func checkOneTarget(t *testing.T, tg []*targetgroup.Group) {
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testutil.Equals(t, 1, len(tg))
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target := tg[0]
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testutil.Equals(t, "test-dc", string(target.Labels["__meta_consul_dc"]))
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testutil.Equals(t, target.Source, string(target.Labels["__meta_consul_service"]))
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if target.Source == "test" {
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// test service should have one node.
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testutil.Assert(t, len(target.Targets) > 0, "Test service should have one node")
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}
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}
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// Watch all the services in the catalog.
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func TestAllServices(t *testing.T) {
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stub, config := newServer(t)
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defer stub.Close()
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d := newDiscovery(t, config)
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ctx, cancel := context.WithCancel(context.Background())
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ch := make(chan []*targetgroup.Group)
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go d.Run(ctx, ch)
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checkOneTarget(t, <-ch)
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checkOneTarget(t, <-ch)
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cancel()
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}
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// Watch only the test service.
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func TestOneService(t *testing.T) {
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stub, config := newServer(t)
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defer stub.Close()
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config.Services = []string{"test"}
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d := newDiscovery(t, config)
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ctx, cancel := context.WithCancel(context.Background())
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ch := make(chan []*targetgroup.Group)
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go d.Run(ctx, ch)
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checkOneTarget(t, <-ch)
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cancel()
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}
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// Watch the test service with a specific tag and node-meta.
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func TestAllOptions(t *testing.T) {
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stub, config := newServer(t)
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defer stub.Close()
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config.Services = []string{"test"}
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config.NodeMeta = map[string]string{"rack_name": "2304"}
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config.ServiceTags = []string{"tag1"}
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config.AllowStale = true
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config.Token = "fake-token"
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d := newDiscovery(t, config)
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ctx, cancel := context.WithCancel(context.Background())
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ch := make(chan []*targetgroup.Group)
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go d.Run(ctx, ch)
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checkOneTarget(t, <-ch)
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cancel()
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}
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func TestGetDatacenterShouldReturnError(t *testing.T) {
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for _, tc := range []struct {
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handler func(http.ResponseWriter, *http.Request)
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errMessage string
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}{
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{
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// Define a handler that will return status 500.
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handler: func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(500)
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},
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errMessage: "Unexpected response code: 500 ()",
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},
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{
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// Define a handler that will return incorrect response.
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handler: func(w http.ResponseWriter, r *http.Request) {
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w.Write([]byte(`{"Config": {"Not-Datacenter": "test-dc"}}`))
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},
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errMessage: "invalid value '<nil>' for Config.Datacenter",
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},
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} {
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stub := httptest.NewServer(http.HandlerFunc(tc.handler))
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stuburl, err := url.Parse(stub.URL)
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testutil.Ok(t, err)
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config := &SDConfig{
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Server: stuburl.Host,
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Token: "fake-token",
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RefreshInterval: model.Duration(1 * time.Second),
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}
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defer stub.Close()
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d := newDiscovery(t, config)
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// Should be empty if not initialized.
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testutil.Equals(t, "", d.clientDatacenter)
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err = d.getDatacenter()
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// An error should be returned.
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testutil.Equals(t, tc.errMessage, err.Error())
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// Should still be empty.
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testutil.Equals(t, "", d.clientDatacenter)
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}
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}
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