Kubernetes Labels
Show Labels
pradeep@learnk8s$ kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
demo-6c54f77c95-6g7zq 1/1 Running 0 3m32s app=demo,pod-template-hash=6c54f77c95
demo-6c54f77c95-sb4c9 1/1 Running 0 3m32s app=demo,pod-template-hash=6c54f77c95
demo-6c54f77c95-w2bsw 1/1 Running 0 3m32s app=demo,pod-template-hash=6c54f77c95
nginx 1/1 Running 0 8m6s run=nginx
pradeep@learnk8s$ kubectl get nodes --show-labels
NAME STATUS ROLES AGE VERSION LABELS
k8s Ready control-plane,master 92m v1.23.1 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=k8s,kubernetes.io/os=linux,minikube.k8s.io/commit=3e64b11ed75e56e4898ea85f96b2e4af0301f43d,minikube.k8s.io/name=k8s,minikube.k8s.io/updated_at=2022_02_04T05_49_32_0700,minikube.k8s.io/version=v1.25.1,node-role.kubernetes.io/control-plane=,node-role.kubernetes.io/master=,node.kubernetes.io/exclude-from-external-load-balancers=
k8s-m02 Ready <none> 91m v1.23.1 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=k8s-m02,kubernetes.io/os=linux
Apply Labels
pradeep@learnk8s$ kubectl label pods nginx new-label=awesome
pod/nginx labeled
pradeep@learnk8s$ kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
demo-6c54f77c95-6g7zq 1/1 Running 0 8m47s app=demo,pod-template-hash=6c54f77c95
demo-6c54f77c95-sb4c9 1/1 Running 0 8m47s app=demo,pod-template-hash=6c54f77c95
demo-6c54f77c95-w2bsw 1/1 Running 0 8m47s app=demo,pod-template-hash=6c54f77c95
nginx 1/1 Running 0 13m new-label=awesome,run=nginx
Label Selector
pradeep@learnk8s$ kubectl get pods --selector=app=demo
NAME READY STATUS RESTARTS AGE
demo-6c54f77c95-6g7zq 1/1 Running 0 10m
demo-6c54f77c95-sb4c9 1/1 Running 0 10m
demo-6c54f77c95-w2bsw 1/1 Running 0 10m
pradeep@learnk8s$ kubectl get pods --selector=run=nginx
NAME READY STATUS RESTARTS AGE
nginx 1/1 Running 0 15m
pradeep@learnk8s$ kubectl get pods --selector=new-label=awesome
NAME READY STATUS RESTARTS AGE
nginx 1/1 Running 0 15m
