I am creating a pod in k8 client go and making a watch to get notified for when the pod has completed so that i can read the logs of the pod. The watch interface doesnt seem to provide any events on the channel. Here is the code, how would I get notified that the pod status is now completed and is ready to read the logs
func readLogs(clientset *kubernetes.Clientset) {
// namespace := "default"
// label := "cithu"
var (
pod *v1.Pod
// watchface watch.Interface
err error
)
// returns a pod after creation
pod, err = createPod(clientset)
fmt.Println(pod.Name, pod.Status, err)
if watchface, err = clientset.CoreV1().Pods(namespace).Watch(metav1.ListOptions{
LabelSelector: pod.Name,
}); err != nil {
log.Fatalf(err.Error())
}
// How do I get notified when the pod.Status == completed
}
The events can be listed using the following snippet. You can then process the pod events as needed.
label := ""
for k := range pod.GetLabels() {
label = k
break
}
watch, err := clientset.CoreV1().Pods(namespace).Watch(metav1.ListOptions{
LabelSelector: label,
})
if err != nil {
log.Fatal(err.Error())
}
go func() {
for event := range watch.ResultChan() {
fmt.Printf("Type: %v\n", event.Type)
p, ok := event.Object.(*v1.Pod)
if !ok {
log.Fatal("unexpected type")
}
fmt.Println(p.Status.ContainerStatuses)
fmt.Println(p.Status.Phase)
}
}()
time.Sleep(5 * time.Second)You keep could keep checking the pod status in a loop and whenever the status changes to successful, you're done
for {
pod, _ := clientset.CoreV1().Pods(Namespace).Get(podName, metav1.GetOptions{})
if pod.Status.Phase != corev1.PodPending {
break
}
}
pod, _ := clientset.CoreV1().Pods(corev1.NamespaceDefault).Get(podName, metav1.GetOptions{})
if pod.Status.Phase != corev1.PodSucceeded {
return false, fmt.Errorf("Pod did not succeed/complete")
}
return true, nil