How to install kubectl in kubernetes container through docker image

Question

I want to run \'kubectl\' commands in the container, so i want to install kubectl in the container, through while building the Docker image. Any help is appreciated!

Answer 1

You just need to map kubectl (e.g. /usr/local/bin/kubectl) binary file and kubeconfig (e.g. /root/.kube/config) into your container.

For example (yaml file for Deployment):

      containers:
      - image: container-image-name
        name: container-name
        volumeMounts:
        - name: kubectl-binary
          mountPath: /usr/local/bin/kubectl
          readOnly: true
        - name: kubectl-config
          mountPath: /root/.kube/config
          readOnly: true
      volumes:
      - name: kubectl-binary
        hostPath:
          path: /usr/local/bin/kubectl
      - name: kubectl-config
        hostPath:
          path: /root/.kube/config

P.S.

use the following command to download kubectl binary file on each node, and copy /root/.kube/config to each node:

$ curl -L https://dl.k8s.io/v1.10.6/bin/linux/amd64/kubectl -o /usr/local/bin/kubectl