prometheus/discovery/kubernetes/node_test.go

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// Copyright 2016 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 kubernetes
import (
"encoding/json"
"fmt"
"sync"
"testing"
"time"
"github.com/prometheus/common/log"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/config"
"github.com/stretchr/testify/require"
"golang.org/x/net/context"
"k8s.io/client-go/1.5/pkg/api/v1"
"k8s.io/client-go/1.5/tools/cache"
)
type fakeInformer struct {
store cache.Store
handlers []cache.ResourceEventHandler
blockDeltas sync.Mutex
}
func newFakeInformer(f func(obj interface{}) (string, error)) *fakeInformer {
i := &fakeInformer{
store: cache.NewStore(f),
}
// We want to make sure that all delta events (Add/Update/Delete) are blocked
// until our handlers to test have been added.
i.blockDeltas.Lock()
return i
}
func (i *fakeInformer) AddEventHandler(handler cache.ResourceEventHandler) error {
i.handlers = append(i.handlers, handler)
// Only now that there is a registered handler, we are able to handle deltas.
i.blockDeltas.Unlock()
return nil
}
func (i *fakeInformer) GetStore() cache.Store {
return i.store
}
func (i *fakeInformer) GetController() cache.ControllerInterface {
return nil
}
func (i *fakeInformer) Run(stopCh <-chan struct{}) {
return
}
func (i *fakeInformer) HasSynced() bool {
return true
}
func (i *fakeInformer) LastSyncResourceVersion() string {
return "0"
}
func (i *fakeInformer) Add(obj interface{}) {
i.blockDeltas.Lock()
defer i.blockDeltas.Unlock()
for _, h := range i.handlers {
h.OnAdd(obj)
}
}
func (i *fakeInformer) Delete(obj interface{}) {
i.blockDeltas.Lock()
defer i.blockDeltas.Unlock()
for _, h := range i.handlers {
h.OnDelete(obj)
}
}
func (i *fakeInformer) Update(obj interface{}) {
i.blockDeltas.Lock()
defer i.blockDeltas.Unlock()
for _, h := range i.handlers {
h.OnUpdate(nil, obj)
}
}
type targetProvider interface {
Run(ctx context.Context, up chan<- []*config.TargetGroup)
}
type k8sDiscoveryTest struct {
discovery targetProvider
afterStart func()
expectedInitial []*config.TargetGroup
expectedRes []*config.TargetGroup
}
func (d k8sDiscoveryTest) Run(t *testing.T) {
ch := make(chan []*config.TargetGroup)
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond*10)
defer cancel()
go func() {
d.discovery.Run(ctx, ch)
}()
initialRes := <-ch
if d.expectedInitial != nil {
requireTargetGroups(t, d.expectedInitial, initialRes)
}
if d.afterStart != nil && d.expectedRes != nil {
d.afterStart()
res := <-ch
requireTargetGroups(t, d.expectedRes, res)
}
}
func requireTargetGroups(t *testing.T, expected, res []*config.TargetGroup) {
b1, err := json.Marshal(expected)
if err != nil {
panic(err)
}
b2, err := json.Marshal(res)
if err != nil {
panic(err)
}
require.JSONEq(t, string(b1), string(b2))
}
func nodeStoreKeyFunc(obj interface{}) (string, error) {
return obj.(*v1.Node).ObjectMeta.Name, nil
}
func newFakeNodeInformer() *fakeInformer {
return newFakeInformer(nodeStoreKeyFunc)
}
func makeTestNodeDiscovery() (*Node, *fakeInformer) {
i := newFakeNodeInformer()
return NewNode(log.Base(), i), i
}
func makeNode(name, address string, labels map[string]string, annotations map[string]string) *v1.Node {
return &v1.Node{
ObjectMeta: v1.ObjectMeta{
Name: name,
Labels: labels,
Annotations: annotations,
},
Status: v1.NodeStatus{
Addresses: []v1.NodeAddress{
v1.NodeAddress{
Type: v1.NodeInternalIP,
Address: address,
},
},
DaemonEndpoints: v1.NodeDaemonEndpoints{
KubeletEndpoint: v1.DaemonEndpoint{
Port: 10250,
},
},
},
}
}
func makeEnumeratedNode(i int) *v1.Node {
return makeNode(fmt.Sprintf("test%d", i), "1.2.3.4", map[string]string{}, map[string]string{})
}
func TestNodeDiscoveryInitial(t *testing.T) {
n, i := makeTestNodeDiscovery()
i.GetStore().Add(makeNode(
"test",
"1.2.3.4",
map[string]string{"testlabel": "testvalue"},
map[string]string{"testannotation": "testannotationvalue"},
))
k8sDiscoveryTest{
discovery: n,
expectedInitial: []*config.TargetGroup{
&config.TargetGroup{
Targets: []model.LabelSet{
model.LabelSet{
"__address__": "1.2.3.4:10250",
"instance": "test",
"__meta_kubernetes_node_address_InternalIP": "1.2.3.4",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_node_name": "test",
"__meta_kubernetes_node_label_testlabel": "testvalue",
"__meta_kubernetes_node_annotation_testannotation": "testannotationvalue",
},
Source: "node/test",
},
},
}.Run(t)
}
func TestNodeDiscoveryAdd(t *testing.T) {
n, i := makeTestNodeDiscovery()
k8sDiscoveryTest{
discovery: n,
afterStart: func() { go func() { i.Add(makeEnumeratedNode(1)) }() },
expectedRes: []*config.TargetGroup{
&config.TargetGroup{
Targets: []model.LabelSet{
model.LabelSet{
"__address__": "1.2.3.4:10250",
"instance": "test1",
"__meta_kubernetes_node_address_InternalIP": "1.2.3.4",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_node_name": "test1",
},
Source: "node/test1",
},
},
}.Run(t)
}
func TestNodeDiscoveryDelete(t *testing.T) {
n, i := makeTestNodeDiscovery()
i.GetStore().Add(makeEnumeratedNode(0))
k8sDiscoveryTest{
discovery: n,
afterStart: func() { go func() { i.Delete(makeEnumeratedNode(0)) }() },
expectedInitial: []*config.TargetGroup{
&config.TargetGroup{
Targets: []model.LabelSet{
model.LabelSet{
"__address__": "1.2.3.4:10250",
"instance": "test0",
"__meta_kubernetes_node_address_InternalIP": "1.2.3.4",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_node_name": "test0",
},
Source: "node/test0",
},
},
expectedRes: []*config.TargetGroup{
&config.TargetGroup{
Source: "node/test0",
},
},
}.Run(t)
}
func TestNodeDiscoveryDeleteUnknownCacheState(t *testing.T) {
n, i := makeTestNodeDiscovery()
i.GetStore().Add(makeEnumeratedNode(0))
k8sDiscoveryTest{
discovery: n,
afterStart: func() { go func() { i.Delete(cache.DeletedFinalStateUnknown{Obj: makeEnumeratedNode(0)}) }() },
expectedInitial: []*config.TargetGroup{
&config.TargetGroup{
Targets: []model.LabelSet{
model.LabelSet{
"__address__": "1.2.3.4:10250",
"instance": "test0",
"__meta_kubernetes_node_address_InternalIP": "1.2.3.4",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_node_name": "test0",
},
Source: "node/test0",
},
},
expectedRes: []*config.TargetGroup{
&config.TargetGroup{
Source: "node/test0",
},
},
}.Run(t)
}
func TestNodeDiscoveryUpdate(t *testing.T) {
n, i := makeTestNodeDiscovery()
i.GetStore().Add(makeEnumeratedNode(0))
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
go func() {
i.Update(
makeNode(
"test0",
"1.2.3.4",
map[string]string{"Unschedulable": "true"},
map[string]string{},
),
)
}()
},
expectedInitial: []*config.TargetGroup{
&config.TargetGroup{
Targets: []model.LabelSet{
model.LabelSet{
"__address__": "1.2.3.4:10250",
"instance": "test0",
"__meta_kubernetes_node_address_InternalIP": "1.2.3.4",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_node_name": "test0",
},
Source: "node/test0",
},
},
expectedRes: []*config.TargetGroup{
&config.TargetGroup{
Targets: []model.LabelSet{
model.LabelSet{
"__address__": "1.2.3.4:10250",
"instance": "test0",
"__meta_kubernetes_node_address_InternalIP": "1.2.3.4",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_node_label_Unschedulable": "true",
"__meta_kubernetes_node_name": "test0",
},
Source: "node/test0",
},
},
}.Run(t)
}