Tcp探测示例：
    image.png

    apiVersion: v1
    kind: Pod
    metadata:
    labels:
    test: liveness-tcp
    name: liveness-tcp
    spec:
    containers:
    - name: liveness-tcp-demo
    image: nginx:1.12-alpine
    ports:
    - name: http
    containerPort: 80
    livenessProbe:
    tcpSocket:
    port: http