How to List Pod Details in Kubernetes using the Go Client?

List Pod Details with Kubernetes Go-Client

Accessing pod details using the Kubernetes client-go library allows you to programmatically retrieve information similar to using the kubectl get pods command.

To get specific details such as name, status, ready state, restarts, and age of pods within a given namespace, follow these steps:

1. Import the necessary packages:

<code class="go">import (
    "context"
    "fmt"
    "time"

    corev1 "k8s.io/api/core/v1"
    metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)</code>

2. Create a function to list pods in the desired namespace:

<code class="go">func GetPods(client *meshkitkube.Client, namespace string) (*v1core.PodList, error) {
    podInterface := client.KubeClient.CoreV1().Pods(namespace)
    podList, err := podInterface.List(context.TODO(), v1.ListOptions{})
    if err != nil {
        return nil, err
    }
    return podList, nil
}</code>

3. Iterate through the retrieved pods to extract the required data:

<code class="go">// List pod details similar to `kubectl get pods -n <my namespace>`
for _, pod := range podList.Items {
    podCreationTime := pod.GetCreationTimestamp()
    age := time.Since(podCreationTime.Time).Round(time.Second)
    podStatus := pod.Status
    containerRestarts := int32(0)
    containerReady := 0
    totalContainers := len(pod.Spec.Containers)
    for container := range pod.Spec.Containers {
        containerRestarts += podStatus.ContainerStatuses[container].RestartCount
        if podStatus.ContainerStatuses[container].Ready {
            containerReady++
        }
    }
    name := pod.GetName()
    ready := fmt.Sprintf("%v/%v", containerReady, totalContainers)
    status := fmt.Sprintf("%v", podStatus.Phase)
    restarts := fmt.Sprintf("%v", containerRestarts)
    ageS := age.String()
    data = append(data, []string{name, ready, status, restarts, ageS})
}</code>

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