Kubernetes labels

https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/

• kubectl label pods -l app=LABEL new_label_tier=new_label_valuefe
• kubectl label nodes <node-name> <label-key>=<label-value>

• kubectl get nodes --show-labels
• kubectl get pods --show-labels

kubectl get pods -l environment=myproduction,tier=myfrontend
kubectl get pods -l 'environment in (myproduction, myqa)'

.../...
metadata:
 labels:
.../...

kubectl describe pod my-release-kubernetes-dashboard
.../...
Labels:       app.kubernetes.io/component=kubernetes-dashboard
             app.kubernetes.io/instance=my-release
             app.kubernetes.io/managed-by=Helm
             app.kubernetes.io/name=kubernetes-dashboard
             app.kubernetes.io/version=2.4.0
             helm.sh/chart=kubernetes-dashboard-5.0.4
             pod-template-hash=b8c4f9c87
.../...

 labels:
   addonmanager.kubernetes.io/mode: EnsureExists

Activities

• CKA v1.15, CKA v1.21: Understand how to use Labels, Selector and Annotations
• CKA v1.18: Use label selectors to schedule Pods
• Read recommended labels: https://kubernetes.io/docs/concepts/overview/working-with-objects/common-labels/

Related

• kubectl label
• kubectl annotate
• kubectl describe configmaps
• Kubernetes selectors: selector:

See also

• kubectl label [ pods | nodes | --help ]
• Kubernetes labels, selectors, recommended labels , kubectl label, kubectl annotate, Common, kubernetes.io, app.kubernetes.io, MatchLabels:, labels: