资源定义haproxy负载均衡

K8s资源定义haproxy

先提前做出两个运行httpd程序的pod，其中默认的index.html文件不一样
httpd1

[root@master opt]# vim httpd1/Dockerfile

FROM busybox
  
RUN mkdir /data && echo 'hello2' > /data/index.html

CMD ["/bin/httpd","-f","-h","/data"]
[root@master opt]# docker build -t luojiatian1904/httpd1:latest httpd1
Sending build context to Docker daemon  2.048kB
Step 1/3 : FROM busybox
latest: Pulling from library/busybox
3cb635b06aa2: Pull complete 
Digest: sha256:b5cfd4befc119a590ca1a81d6bb0fa1fb19f1fbebd0397f25fae164abe1e8a6a
Status: Downloaded newer image for busybox:latest
 ---> ffe9d497c324
Step 2/3 : RUN mkdir /data && echo 'hello2' > /data/index.html
 ---> Running in 16793c5e99fe
Removing intermediate container 16793c5e99fe
 ---> 356da48e1ad0
Step 3/3 : CMD ["/bin/httpd","-f","-h","/data"]
 ---> Running in a19baba5cda2
Removing intermediate container a19baba5cda2
 ---> 197ca4bf136d
Successfully built 197ca4bf136d
Successfully tagged luojiatian1904/httpd1:latest

httpd2

[root@master opt]# vim httpd2/Dockerfile
FROM busybox
  
RUN mkdir /data && echo 'hello1' > /data/index.html

CMD ["/bin/httpd","-f","-h","/data"]        
[root@master opt]# docker build -t luojiatian1904/httpd2:latest httpd2
Sending build context to Docker daemon  2.048kB
Step 1/3 : FROM busybox
 ---> ffe9d497c324
Step 2/3 : RUN mkdir /data && echo 'hello1' > /data/index.html
 ---> Running in aa279810c655
Removing intermediate container aa279810c655
 ---> 5cf0f02b30e6
Step 3/3 : CMD ["/bin/httpd","-f","-h","/data"]
 ---> Running in 35f7931c2ca3
Removing intermediate container 35f7931c2ca3
 ---> 525b3c42eb82
Successfully built 525b3c42eb82
Successfully tagged luojiatian1904/httpd2:latest                                       

用这两个镜像做出两个pod并做出两个service

[root@master mainfest]# vim httpd1.yaml
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: httpd1
  name: httpd1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: httpd1
  template:
    metadata:
      labels:
        app: httpd1
    spec:
      containers:
           - image: luojiatian1904/httpd1:latest
             name: httpd1
---
apiVersion: v1
kind: Service
metadata:
  name: httpd1
spec:
  ports:
  - port: 80
    targetPort: 80
  selector:
    app: httpd1
    [root@master mainfest]# kubectl create -f httpd1.yaml 
deployment.apps/httpd1 created
service/httpd1 created

httpd2

[root@master mainfest]# vi httpd2.yaml
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: httpd2
  name: httpd2
spec:
  replicas: 1
  selector:
    matchLabels:
      app: httpd2
  template:
    metadata:
      labels:
        app: httpd2
    spec:
      containers:
      - image: luojiatian1904/httpd2:latest
        name: httpd2
---
apiVersion: v1
kind: Service
metadata:
  name: httpd2
spec:
  ports:
  - port: 80
    targetPort: 80
  selector:
    app: httpd2
[root@master mainfest]# kubectl create -f httpd2.yaml 
deployment.apps/httpd2 created
service/httpd2 created

查看pod和service

[root@master mainfest]# kubectl get pod,svc
NAME                           READY   STATUS    RESTARTS   AGE
pod/httpd1-79cd6b6b9b-cdvcf    1/1     Running   0          7m
pod/httpd2-657ddc4ddc-vjdmf    1/1     Running   0          10m

NAME                 TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
service/httpd1       ClusterIP   10.107.234.122   <none>        80/TCP         9m24s
service/httpd2       ClusterIP   10.108.239.127   <none>        80/TCP         64m
service/kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP        3d4h

编写写资源清单定义haproxy

[root@master mainfest]# vi haproxy.yaml 
---
apiVersion: apps/v1
kind: Pod
metadata:
  name: haproxy
  namespace: default
  labels:
    app: haproxy
spec:
  restartPolicy: OnFailure
  initContainers:
  - name: cfgfile
    volumeMounts:
    - name: haproxyconfigfile
      mountPath: /tmp
  containers:
  - image: bravealove1/haproxy:latest
    imagePullPolicy: IfNotPresent
    name: haproxy
    env:
      - name: RSIP
        value: "10.107.234.122 10.108.239.127 "
    livenessProbe:
      tcpSocket:
        port: 80
      initialDelaySeconds: 30
      periodSeconds: 10
    readinessProbe:
      tcpSocket:
        port: 80
      initialDelaySeconds: 30
      periodSeconds: 10
---
apiVersion: v1
kind: Service
metadata:
  name: haproxy
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: haproxy
  type: NodePort

测试