How to install kubectl in kubernetes container through docker image

put this in your Dockerfile

RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectlRUN chmod +x ./kubectlRUN mv ./kubectl /usr/local/bin

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

Weike's solution works fine for me with different kubectl path, any how if some one looking for solution to install the kubectl in the Docker image then here is the Docker file (it also installs python and kubernetes python client api, if we want to access cluster through python client api):

FROM base_imageWORKDIR /tmpRUN  /usr/bin/curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl \     && chmod +x ./kubectl  \     &&  mv ./kubectl /usr/local/bin/kubectl \     && zypper install -y python2 \     && zypper install -y python2-pip \     && pip install kubernetes \     && zypper install -y git \     && zypper clean -a \     && git clone --recursive https://github.com/kubernetes-client/python.git \     && cd python \     && python setup.py install

Also here is my deployment file to map kubectl binary and configuration to container to access kubectl in the kubernetes container with in the pod:

apiVersion: apps/v1kind: Deploymentmetadata:  name: support  labels:    app: support  namespace: defaultspec:  replicas: 1  selector:    matchLabels:      app: support  template:    metadata:      labels:        app: support    spec:      terminationGracePeriodSeconds: 3      imagePullSecrets:      - name: mysecret      containers:        - name: support          image: image-name          command:            - "/bin/sh"            - "-c"            - "sleep infinity"          volumeMounts:          - name: kubectl-binary            mountPath: /usr/bin/kubectl            readOnly: true          - name: kubectl-config            mountPath: /etc/kubernetes/config            readOnly: true      volumes:        - name: kubectl-binary          hostPath:            path: /usr/bin/kubectl        - name: kubectl-config          hostPath:            path: /etc/kubernetes/config