Labels and Annotations

  • Labels go under metadata: in your YAML
  • Simple list of key: value for identifying your resource later by selecting, grouping, or filtering for it
  • Common examples include 'tier: frontend, app: api, env: prod, customer:'
  • Not meant to hold complex, large or non-identifying information, which is what annotations are for
  • Filter a get command by label:
    kubectl get pods -l app=nginx
  • Apply only matching labels:
    kubectl apply -f myfile.yml -l app=nginx