rc使用例子：
root@kubernetes-master:~/test/second# cat rc_nginx.yaml
apiVersion: v1
kind: ReplicationController
metadata:
  name: nginx-test
spec:
  replicas: 2
  selector:
    app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: test-nginx
        image: nginx/zl     #表示镜像名称
        ports:
        - containerPort: 80

service:
root@kubernetes-master:~/test/second# cat service_nginx.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginxsvc
spec:
  ports:
  - port: 8081
    targetPort: 80
    protocol: TCP
  selector:
      app: nginx

service-nodeport:
root@kubernetes-master:~/test/second# cat service_nginx_nodeport.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx-service-nodeport
spec:
  ports:
  - port: 8082
    targetPort: 80
    protocol: TCP
  type: NodePort
  selector:
      app: nginx

root@kubernetes-master:~/test/second# cat service_loadbalance_nginx.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx-loadbalance
spec:
  ports:
  - port: 8082
    targetPort: 80
    protocol: TCP
    nodePort: 32666
  clusterIP: 192.168.3.77
  type: LoadBalancer
  selector:
      app: nginx
  status:
    loadBalancer:
      ingress:
      - ip: 10.149.151.120   #注意这个ip地址为kubernetes集群中的物理机的ip地址；