How to watch persistentVolumes with a kubernetes go-client

General Discussions
1

In this code I am watching the services, and it is working, my question is, how could I do to watch events when a persistenVolume is being created? I have checked https://github.com/kubernetes/client-go/blob/7b18d6600f6b0022e31c46b46875beffd85cc71a/kubernetes/typed/core/v1/persistentvolume.go#L93 and it seems to return an interface, but I am not really familiar of how to make it work, any help is appreciated it.

Thanks in advance.

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)
    }
}
2

Check out the code in the scheduler that sets up a SharedInformer [1]
that listens for persistent volume (and persistent volume claim) events [2].

Hope this helps,
-jay

[1]

[2]