先简单的做出两个运行httpd程序的pod，其中默认的index.html文件不一样

[root@master httpd]# vim Dockerfile
FROM busybox
RUN mkdir  /data && \
    echo "test page on jjyy" > /data/index.html
ENTRYPOINT ["/bin/httpd","-f","-h","/data"]
[root@master ~]# docker build -t 1314444/httpd:v0.1 httpd


[root@master ~]# vim httpd/Dockerfile 
FROM busybox
RUN mkdir  /data && \
    echo "test page on 666" > /data/index.html
ENTRYPOINT ["/bin/httpd","-f","-h","/data"]
[root@master ~]# docker build -t 1314444/httpd:v0.2 httpd

web1

[root@master ~]# cat manifest/web1.yml 
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web1
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: web1
  template:  
    metadata:
      labels:
        app: web1
    spec:
      containers:
      - name: web1
        image: 1314444/httpd:v0.1
        imagePullPolicy: IfNotPresent
---
apiVersion: v1
kind: Service
metadata:
  name: web1
  namespace: default
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: web1
  type: NodePort




[root@master ~]# kubectl apply -f manifest/web1.yml 
deployment.apps/web1 created
service/web1 created
[root@master ~]# kubectl get pod,svc
NAME                        READY   STATUS    RESTARTS   AGE
pod/web1-855b788957-8fzpg      1/1     Running   0          17m

NAME                 TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
service/kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP        3d9h
service/web1         NodePort    10.101.207.28    <none>        80:31807/TCP   17m

web2

[root@master ~]# cat manifest/web2.yml 
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web2
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: web2
  template:  
    metadata:
      labels:
        app: web2
    spec:
      containers:
      - name: httpd
        image: 1314444/httpd:v0.2
        imagePullPolicy: IfNotPresent
---
apiVersion: v1
kind: Service
metadata:
  name: web2
  namespace: default
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: web2
  type: NodePort


[root@master ~]# kubectl apply -f manifest/web2.yml 
deployment.apps/web2 created
service/web2 created
[root@master ~]# kubectl get pod,svc
NAME                        READY   STATUS    RESTARTS   AGE
pod/web1-855b788957-8fzpg      1/1     Running   0          17m
pod/web2-5f7456967b-t5vqs      1/1     Running   0          17m

NAME                 TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
service/kubernetes   ClusterIP   10.96.0.1       <none>        443/TCP    3d8h
service/web1         NodePort    10.101.207.28    <none>        80:31807/TCP   17m
service/web2         NodePort    10.100.246.130   <none>        80:31413/TCP   17m

haproxy

[root@master ~]# cat manifest/haproxy.yml
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: haproxy
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: haproxy
  template:  
    metadata:
      labels:
        app: haproxy
    spec:
      containers:
        - image: 1314444/haproxy:v0.3
          imagePullPolicy: IfNotPresent
          name: haproxy
          env:
           - name: RSIP
             value: "10.101.207.28   10.100.246.130"

---
apiVersion: v1
kind: Service
metadata:
  name: haproxy
  namespace: default
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: haproxy
  type: NodePort


[root@master ~]# kubectl apply -f manifest/haproxy.yml 
deployment.apps/haproxy created
[root@master ~]# kubectl get pod,svc
NAME                           READY   STATUS    RESTARTS   AGE
pod/haproxy-54c76db7b8-bl44g   1/1     Running   0          111s
pod/web1-855b788957-8fzpg      1/1     Running   0          17m
pod/web2-5f7456967b-t5vqs      1/1     Running   0          17m

NAME                 TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
service/haproxy      NodePort    10.101.200.144   <none>        80:30311/TCP   13m
service/kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP        3d9h
service/web1         NodePort    10.101.207.28    <none>        80:31807/TCP   17m
service/web2         NodePort    10.100.246.130   <none>        80:31413/TCP   17m

测试

[root@master ~]# curl 10.101.207.28
test page on jjyy
[root@master ~]# curl 10.100.246.130
test page on 666

[root@master ~]# curl 10.101.200.144
test page on jjyy
[root@master ~]# curl 10.101.200.144
test page on 666
[root@master ~]# curl 10.101.200.144
test page on jjyy
[root@master ~]# curl 10.101.200.144
test page on 666