Add leader election examples about k8s HOT 2 CLOSED

func lockResource(ctx context.Context, c *k8s.Client, r k8s.Resource, ns, name string) (leader bool, err error) {
    if err := c.Get(ctx, ns, name, r); err != nil {
        return false, err
    }
    meta := r.GetMetadata()

    // compare and/or modify leader election annotations

    if leader {
        // update lock
        if err := c.Update(ctx, r); err != nil {
            return false, err
        }
    }

    return leader, nil
}

var ds appsv1.Deployment
lockResource(ctx, client, &ds, "my-ns", "my-deployment")

var cm corev1.ConfigMap
lockResource(ctx, client, &cm, "my-ns", "my-configmap")