156 lines
3.9 KiB
Go
156 lines
3.9 KiB
Go
/*
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Copyright 2019 The Kubernetes 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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package pluginmanager
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import (
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"fmt"
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"io/ioutil"
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"os"
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"sync"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/client-go/tools/record"
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registerapi "k8s.io/kubelet/pkg/apis/pluginregistration/v1"
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"k8s.io/kubernetes/pkg/kubelet/config"
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"k8s.io/kubernetes/pkg/kubelet/pluginmanager/pluginwatcher"
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)
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var (
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socketDir string
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supportedVersions = []string{"v1beta1", "v1beta2"}
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)
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type fakePluginHandler struct {
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validatePluginCalled bool
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registerPluginCalled bool
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deregisterPluginCalled bool
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sync.RWMutex
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}
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func newFakePluginHandler() *fakePluginHandler {
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return &fakePluginHandler{
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validatePluginCalled: false,
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registerPluginCalled: false,
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deregisterPluginCalled: false,
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}
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}
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// ValidatePlugin is a fake method
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func (f *fakePluginHandler) ValidatePlugin(pluginName string, endpoint string, versions []string) error {
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f.Lock()
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defer f.Unlock()
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f.validatePluginCalled = true
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return nil
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}
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// RegisterPlugin is a fake method
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func (f *fakePluginHandler) RegisterPlugin(pluginName, endpoint string, versions []string) error {
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f.Lock()
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defer f.Unlock()
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f.registerPluginCalled = true
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return nil
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}
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// DeRegisterPlugin is a fake method
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func (f *fakePluginHandler) DeRegisterPlugin(pluginName string) {
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f.Lock()
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defer f.Unlock()
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f.deregisterPluginCalled = true
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}
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func init() {
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d, err := ioutil.TempDir("", "plugin_manager_test")
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if err != nil {
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panic(fmt.Sprintf("Could not create a temp directory: %s", d))
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}
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socketDir = d
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}
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func cleanup(t *testing.T) {
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require.NoError(t, os.RemoveAll(socketDir))
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os.MkdirAll(socketDir, 0755)
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}
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func waitForRegistration(t *testing.T, fakePluginHandler *fakePluginHandler) {
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err := retryWithExponentialBackOff(
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time.Duration(500*time.Millisecond),
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func() (bool, error) {
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fakePluginHandler.Lock()
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defer fakePluginHandler.Unlock()
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if fakePluginHandler.validatePluginCalled && fakePluginHandler.registerPluginCalled {
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return true, nil
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}
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return false, nil
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},
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)
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if err != nil {
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t.Fatalf("Timed out waiting for plugin to be added to actual state of world cache.")
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}
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}
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func retryWithExponentialBackOff(initialDuration time.Duration, fn wait.ConditionFunc) error {
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backoff := wait.Backoff{
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Duration: initialDuration,
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Factor: 3,
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Jitter: 0,
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Steps: 6,
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}
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return wait.ExponentialBackoff(backoff, fn)
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}
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func TestPluginRegistration(t *testing.T) {
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defer cleanup(t)
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pluginManager := newTestPluginManager(socketDir)
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// Start the plugin manager
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stopChan := make(chan struct{})
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defer close(stopChan)
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go func() {
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sourcesReady := config.NewSourcesReady(func(_ sets.String) bool { return true })
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pluginManager.Run(sourcesReady, stopChan)
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}()
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// Add handler for device plugin
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fakeHandler := newFakePluginHandler()
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pluginManager.AddHandler(registerapi.DevicePlugin, fakeHandler)
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// Add a new plugin
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socketPath := fmt.Sprintf("%s/plugin.sock", socketDir)
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pluginName := "example-plugin"
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p := pluginwatcher.NewTestExamplePlugin(pluginName, registerapi.DevicePlugin, socketPath, supportedVersions...)
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require.NoError(t, p.Serve("v1beta1", "v1beta2"))
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// Verify that the plugin is registered
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waitForRegistration(t, fakeHandler)
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}
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func newTestPluginManager(
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sockDir string) PluginManager {
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pm := NewPluginManager(
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sockDir,
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&record.FakeRecorder{},
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)
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return pm
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}
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