Kubernetes - Labels, Selectors, and Annotations 🏷️

Description 👀

Filter and group pods using labels and selectors. Annotations are used to add metadata to pods.

Basic Commands 📝

• select pods with label

    kubectl get pods --selector <label-name>=<label-value>
  

• count pods with label

    kubectl get pods --selector <label-name>=<label-value> --no-headers | wc -l
  

• select all with multiple labels

    kubectl get all --selector <label-name>=<label-value>,<label-name>=<label-value>
  

Examples 🧩

• sample pod with label

    apiVersion: v1
    kind: Pod
    metadata:
        name: app-1
        labels:
            app: app-1
            function: front-end
    spec:
        containers:
          - name: nginx-app-1
            image: nginx:1.7.9
            ports:
              - containerPort: 8080
  

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