如何使用kubernetes服务的go客户端观看事件
我希望在kubernetes上使用client go更改服务时得到通知。可以这样做:如何使用kubernetes服务的go客户端观看事件,go,kubernetes,Go,Kubernetes,我希望在kubernetes上使用client go更改服务时得到通知。可以这样做: package main import ( "fmt" "flag" "time" "k8s.io/client-go/kubernetes" "k8s.io/client-go/pkg/api/v1" "k8s.io/client-go/tools/clientcmd" "k8s.io/client-go/tools/cache" "k8s.
package main
import (
"fmt"
"flag"
"time"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/pkg/api/v1"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/pkg/fields"
)
var (
kubeconfig = flag.String("kubeconfig", "./config", "absolute path to the kubeconfig file")
)
func main() {
flag.Parse()
config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err != nil {
panic(err.Error())
}
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
panic(err.Error())
}
watchlist := cache.NewListWatchFromClient(clientset.Core().RESTClient(), "services", v1.NamespaceDefault,
fields.Everything())
_, controller := cache.NewInformer(
watchlist,
&v1.Service{},
time.Second * 0,
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
fmt.Printf("service added: %s \n", obj)
},
DeleteFunc: func(obj interface{}) {
fmt.Printf("service deleted: %s \n", obj)
},
UpdateFunc:func(oldObj, newObj interface{}) {
fmt.Printf("service changed \n")
},
},
)
stop := make(chan struct{})
go controller.Run(stop)
for{
time.Sleep(time.Second)
}
}
这是最新版本的client go的使用示例。根据上述代码
主程序包
进口(
“fmt”
“时间”
“github.com/golang/glog”
“k8s.io/api/core/v1”
“k8s.io/API机械/包装/字段”
“k8s.io/client go/kubernetes”
“k8s.io/client go/tools/cache”
“k8s.io/client go/tools/clientcmd”
)
func main(){
配置,错误:=clientcmd.BuildConfigFromFlags(“,”)
如果错误!=零{
glog.erroln(err)
}
clientset,err:=kubernetes.NewForConfig(config)
如果错误!=零{
glog.erroln(err)
}
watchlist:=cache.NewListWatchFromClient(
clientset.CoreV1().RESTClient(),
字符串(v1.ResourceServices),
v1.1名称空间所有,
fields.Everything(),
)
_,controller:=cache.NewInformer(//另请查看NewSharedIndexInformer
观察名单,
&v1.服务{},
0,//持续时间为int64
cache.ResourceEventHandlerFuncs{
AddFunc:func(obj接口{}){
fmt.Printf(“添加的服务:%s\n”,obj)
},
DeleteFunc:func(obj接口{}){
fmt.Printf(“已删除服务:%s\n”,obj)
},
UpdateFunc:func(oldObj,newObj接口{}){
fmt.Printf(“服务已更改\n”)
},
},
)
//我在k8s调度模块中找到了它。如果你对它感兴趣,也许它会有帮助。
//serviceInformer:=cache.NewSharedIndexInformer(监视列表,&v1.Service{},0,cache.indexer{
//cache.NamespaceIndex:cache.MetaNamespaceIndexFunc,
// })
//转到serviceInformer.Run(停止)
停止:=make(chan结构{})
延迟关闭(停止)
go控制器。运行(停止)
为了{
时间。睡眠(时间。秒)
}
}
这是一个使用SharedInformerFactory的简单示例
package main
import (
"fmt"
"time"
"github.com/golang/glog"
kubeinformers "k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/clientcmd"
)
func main() {
config, err := clientcmd.BuildConfigFromFlags("", "")
if err != nil {
glog.Errorln(err)
}
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
glog.Errorln(err)
}
kubeInformerFactory := kubeinformers.NewSharedInformerFactory(clientset, time.Second*30)
svcInformer := kubeInformerFactory.Core().V1().Services().Informer()
svcInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
fmt.Printf("service added: %s \n", obj)
},
DeleteFunc: func(obj interface{}) {
fmt.Printf("service deleted: %s \n", obj)
},
UpdateFunc: func(oldObj, newObj interface{}) {
fmt.Printf("service changed: %s \n", newObj)
},
},)
stop := make(chan struct{})
defer close(stop)
kubeInformerFactory.Start(stop)
for {
time.Sleep(time.Second)
}
}
由于导入,因此无法编译。你能更新一下吗?
package main
import (
"fmt"
"flag"
"time"
"log"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/pkg/api/v1"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/pkg/fields"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/watch"
)
var (
kubeconfig = flag.String("kubeconfig", "./config", "absolute path to the kubeconfig file")
)
func main() {
flag.Parse()
config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err != nil {
log.Fatal(err.Error())
}
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
log.Fatal(err.Error())
}
watcher, err := client.CoreV1().Services(v1.NamespaceDefault,).Watch(metav1.ListOptions{})
if err != nil {
log.Fatal(err)
}
for event := range watcher.ResultChan() {
svc := event.Object.(*v1.Service)
switch event.Type {
case watch.Added:
fmt.Printf("Service %s/%s added", svc.ObjectMeta.Namespace, svc.ObjectMeta.Name)
case watch.Modified:
fmt.Printf("Service %s/%s modified", svc.ObjectMeta.Namespace, svc.ObjectMeta.Name)
case watch.Deleted:
fmt.Printf("Service %s/%s deleted", svc.ObjectMeta.Namespace, svc.ObjectMeta.Name)
}
}
}