mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-04 04:08:16 +00:00
263 lines
8.0 KiB
Go
263 lines
8.0 KiB
Go
/*
|
|
Copyright 2018 The Kubernetes 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 pluginwatcher
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
"k8s.io/apimachinery/pkg/util/wait"
|
|
"k8s.io/klog/v2"
|
|
registerapi "k8s.io/kubelet/pkg/apis/pluginregistration/v1"
|
|
"k8s.io/kubernetes/pkg/kubelet/pluginmanager/cache"
|
|
)
|
|
|
|
var (
|
|
supportedVersions = []string{"v1beta1", "v1beta2"}
|
|
)
|
|
|
|
func init() {
|
|
var logLevel string
|
|
|
|
klog.InitFlags(flag.CommandLine)
|
|
flag.Set("alsologtostderr", fmt.Sprintf("%t", true))
|
|
flag.StringVar(&logLevel, "logLevel", "6", "test")
|
|
flag.Lookup("v").Value.Set(logLevel)
|
|
}
|
|
|
|
func initTempDir(t *testing.T) string {
|
|
// Creating a different directory. os.RemoveAll is not atomic enough;
|
|
// os.MkdirAll can get into an "Access Denied" error on Windows.
|
|
d, err := os.MkdirTemp("", "plugin_test")
|
|
if err != nil {
|
|
t.Fatalf("Could not create a temp directory %s: %v", d, err)
|
|
}
|
|
|
|
return d
|
|
}
|
|
|
|
func waitForRegistration(
|
|
t *testing.T,
|
|
socketPath string,
|
|
dsw cache.DesiredStateOfWorld) {
|
|
err := retryWithExponentialBackOff(
|
|
time.Duration(500*time.Millisecond),
|
|
func() (bool, error) {
|
|
if dsw.PluginExists(socketPath) {
|
|
return true, nil
|
|
}
|
|
return false, nil
|
|
},
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("Timed out waiting for plugin to be added to desired state of world cache:\n%s.", socketPath)
|
|
}
|
|
}
|
|
|
|
func waitForUnregistration(
|
|
t *testing.T,
|
|
socketPath string,
|
|
dsw cache.DesiredStateOfWorld) {
|
|
err := retryWithExponentialBackOff(
|
|
time.Duration(500*time.Millisecond),
|
|
func() (bool, error) {
|
|
if !dsw.PluginExists(socketPath) {
|
|
return true, nil
|
|
}
|
|
return false, nil
|
|
},
|
|
)
|
|
|
|
if err != nil {
|
|
t.Fatalf("Timed out waiting for plugin to be unregistered:\n%s.", socketPath)
|
|
}
|
|
}
|
|
|
|
func retryWithExponentialBackOff(initialDuration time.Duration, fn wait.ConditionFunc) error {
|
|
backoff := wait.Backoff{
|
|
Duration: initialDuration,
|
|
Factor: 3,
|
|
Jitter: 0,
|
|
Steps: 6,
|
|
}
|
|
return wait.ExponentialBackoff(backoff, fn)
|
|
}
|
|
|
|
func TestPluginRegistration(t *testing.T) {
|
|
socketDir := initTempDir(t)
|
|
defer os.RemoveAll(socketDir)
|
|
|
|
dsw := cache.NewDesiredStateOfWorld()
|
|
newWatcher(t, socketDir, dsw, wait.NeverStop)
|
|
|
|
for i := 0; i < 10; i++ {
|
|
socketPath := filepath.Join(socketDir, fmt.Sprintf("plugin-%d.sock", i))
|
|
pluginName := fmt.Sprintf("example-plugin-%d", i)
|
|
|
|
p := NewTestExamplePlugin(pluginName, registerapi.DevicePlugin, socketPath, supportedVersions...)
|
|
require.NoError(t, p.Serve("v1beta1", "v1beta2"))
|
|
|
|
pluginInfo := GetPluginInfo(p)
|
|
waitForRegistration(t, pluginInfo.SocketPath, dsw)
|
|
|
|
// Check the desired state for plugins
|
|
dswPlugins := dsw.GetPluginsToRegister()
|
|
if len(dswPlugins) != 1 {
|
|
t.Fatalf("TestPluginRegistration: desired state of world length should be 1 but it's %d", len(dswPlugins))
|
|
}
|
|
|
|
// Stop the plugin; the plugin should be removed from the desired state of world cache
|
|
require.NoError(t, p.Stop())
|
|
// The following doesn't work when running the unit tests locally: event.Op of plugin watcher won't pick up the delete event
|
|
waitForUnregistration(t, pluginInfo.SocketPath, dsw)
|
|
dswPlugins = dsw.GetPluginsToRegister()
|
|
if len(dswPlugins) != 0 {
|
|
t.Fatalf("TestPluginRegistration: desired state of world length should be 0 but it's %d", len(dswPlugins))
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestPluginRegistrationSameName(t *testing.T) {
|
|
socketDir := initTempDir(t)
|
|
defer os.RemoveAll(socketDir)
|
|
|
|
dsw := cache.NewDesiredStateOfWorld()
|
|
newWatcher(t, socketDir, dsw, wait.NeverStop)
|
|
|
|
// Make 10 plugins with the same name and same type but different socket path;
|
|
// all 10 should be in desired state of world cache
|
|
pluginName := "dep-example-plugin"
|
|
for i := 0; i < 10; i++ {
|
|
socketPath := filepath.Join(socketDir, fmt.Sprintf("plugin-%d.sock", i))
|
|
p := NewTestExamplePlugin(pluginName, registerapi.DevicePlugin, socketPath, supportedVersions...)
|
|
require.NoError(t, p.Serve("v1beta1", "v1beta2"))
|
|
|
|
pluginInfo := GetPluginInfo(p)
|
|
waitForRegistration(t, pluginInfo.SocketPath, dsw)
|
|
|
|
// Check the desired state for plugins
|
|
dswPlugins := dsw.GetPluginsToRegister()
|
|
if len(dswPlugins) != i+1 {
|
|
t.Fatalf("TestPluginRegistrationSameName: desired state of world length should be %d but it's %d", i+1, len(dswPlugins))
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestPluginReRegistration(t *testing.T) {
|
|
socketDir := initTempDir(t)
|
|
defer os.RemoveAll(socketDir)
|
|
|
|
dsw := cache.NewDesiredStateOfWorld()
|
|
newWatcher(t, socketDir, dsw, wait.NeverStop)
|
|
|
|
// Create a plugin first, we are then going to remove the plugin, update the plugin with a different name
|
|
// and recreate it.
|
|
socketPath := filepath.Join(socketDir, "plugin-reregistration.sock")
|
|
pluginName := "reregister-plugin"
|
|
p := NewTestExamplePlugin(pluginName, registerapi.DevicePlugin, socketPath, supportedVersions...)
|
|
require.NoError(t, p.Serve("v1beta1", "v1beta2"))
|
|
pluginInfo := GetPluginInfo(p)
|
|
lastTimestamp := time.Now()
|
|
waitForRegistration(t, pluginInfo.SocketPath, dsw)
|
|
|
|
// Remove this plugin, then recreate it again with a different name for 10 times
|
|
// The updated plugin should be in the desired state of world cache
|
|
for i := 0; i < 10; i++ {
|
|
// Stop the plugin; the plugin should be removed from the desired state of world cache
|
|
// The plugin removal doesn't work when running the unit tests locally: event.Op of plugin watcher won't pick up the delete event
|
|
require.NoError(t, p.Stop())
|
|
waitForUnregistration(t, pluginInfo.SocketPath, dsw)
|
|
|
|
// Add the plugin again
|
|
pluginName := fmt.Sprintf("dep-example-plugin-%d", i)
|
|
p := NewTestExamplePlugin(pluginName, registerapi.DevicePlugin, socketPath, supportedVersions...)
|
|
require.NoError(t, p.Serve("v1beta1", "v1beta2"))
|
|
waitForRegistration(t, pluginInfo.SocketPath, dsw)
|
|
|
|
// Check the dsw cache. The updated plugin should be the only plugin in it
|
|
dswPlugins := dsw.GetPluginsToRegister()
|
|
if len(dswPlugins) != 1 {
|
|
t.Fatalf("TestPluginReRegistration: desired state of world length should be 1 but it's %d", len(dswPlugins))
|
|
}
|
|
if !dswPlugins[0].Timestamp.After(lastTimestamp) {
|
|
t.Fatalf("TestPluginReRegistration: for plugin %s timestamp of plugin is not updated", pluginName)
|
|
}
|
|
lastTimestamp = dswPlugins[0].Timestamp
|
|
}
|
|
}
|
|
|
|
func TestPluginRegistrationAtKubeletStart(t *testing.T) {
|
|
socketDir := initTempDir(t)
|
|
defer os.RemoveAll(socketDir)
|
|
|
|
plugins := make([]*examplePlugin, 10)
|
|
|
|
for i := 0; i < len(plugins); i++ {
|
|
socketPath := filepath.Join(socketDir, fmt.Sprintf("plugin-%d.sock", i))
|
|
pluginName := fmt.Sprintf("example-plugin-%d", i)
|
|
|
|
p := NewTestExamplePlugin(pluginName, registerapi.DevicePlugin, socketPath, supportedVersions...)
|
|
require.NoError(t, p.Serve("v1beta1", "v1beta2"))
|
|
defer func(p *examplePlugin) {
|
|
require.NoError(t, p.Stop())
|
|
}(p)
|
|
|
|
plugins[i] = p
|
|
}
|
|
|
|
dsw := cache.NewDesiredStateOfWorld()
|
|
newWatcher(t, socketDir, dsw, wait.NeverStop)
|
|
|
|
var wg sync.WaitGroup
|
|
for i := 0; i < len(plugins); i++ {
|
|
wg.Add(1)
|
|
go func(p *examplePlugin) {
|
|
defer wg.Done()
|
|
|
|
pluginInfo := GetPluginInfo(p)
|
|
// Validate that the plugin is in the desired state cache
|
|
waitForRegistration(t, pluginInfo.SocketPath, dsw)
|
|
}(plugins[i])
|
|
}
|
|
|
|
c := make(chan struct{})
|
|
go func() {
|
|
defer close(c)
|
|
wg.Wait()
|
|
}()
|
|
|
|
select {
|
|
case <-c:
|
|
return
|
|
case <-time.After(wait.ForeverTestTimeout):
|
|
t.Fatalf("Timeout while waiting for the plugin registration status")
|
|
}
|
|
}
|
|
|
|
func newWatcher(t *testing.T, socketDir string, desiredStateOfWorldCache cache.DesiredStateOfWorld, stopCh <-chan struct{}) *Watcher {
|
|
w := NewWatcher(socketDir, desiredStateOfWorldCache)
|
|
require.NoError(t, w.Start(stopCh))
|
|
|
|
return w
|
|
}
|