# kubectl -n kube-system get pods
NAME READY STATUS RESTARTS AGE
dnsconfig-injector-webhook-deployment-bbb689d69-882dd 1/1 Running 0 5m
Label the default namespace with dnsconfig-injector=enabled
# kubectl label namespace default dnsconfig-injector=enabled
# kubectl get namespace --show-labels
NAME STATUS AGE LABELS
default Active 18h dnsconfig-injector=enabled
kube-public Active 18h
kube-system Active 18h
Deploy an app in Kubernetes cluster, take sleep app as an example