Install kubectl into a Kubernetes Pod

deployment.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: redis
spec:
  replicas: 1
  selector:
    matchLabels:
      app: redis
  template:
    metadata:
      labels:
        app: redis
    spec:
      volumes:
      - name: kubectl
        emptyDir: {}
      initContainers:
      - name: install-kubectl
        image: allanlei/kubectl
        volumeMounts:
        - name: kubectl
          mountPath: /data
        command: ["cp", "/usr/local/bin/kubectl", "/data/kubectl"]
      containers:
      - name: redis
        image: redis:4.0.7-alpine
        command: ["redis-server"]
        volumeMounts:
        - name: kubectl
          subPath: kubectl
          mountPath: /usr/local/bin/kubectl