k8s 部署应用

更新/etc/exports并重启nfs/rpcbind服务，使之能共享新路径

# 在master上sudo vi /etc/exports
/home/bigcat/k8s/beiqin 192.168.121.150/24(rw,sync)

sudo systemctl restart nfs.service
sudo systemctl restart rpcbind.service

# 在node1/node2上建立/usr/local/beiqin，并映射nfs目录到这里
sudo mkdir /usr/local/beiqin
sudo mount 192.168.121.150:/home/bigcat/k8s/beiqin /usr/local/beiqin

部署db，使用sql脚本初始化db

# beiqin-db-deploy

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: beiqin-db-deploy
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: beiqin-db-deploy
    spec:
      volumes:
      - name: beiqin-db-volume
        hostPath:
          path: /usr/local/beiqin   # nfs映射的位置，存放sql脚本
                                    # 从logs中看到这个目录中的所有文件都被扫了一遍，所以最好这里只有sql一个文件。
      containers:
      - name: beiqin-db-deploy
        image: mysql:5.7
        ports:
        - containerPort: 3306
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "root"
        volumeMounts:
        - name: beiqin-db-volume
          mountPath: /docker-entrypoint-initdb.d    # 初始化脚本放到这里，就可以初始化db了

验证db已经生成

kubectl exec -it <db-pod> /bin/bash
mysql -uroot -p
show databases;
show tables;

部署db-service

# beiqin-db-service
apiVersion: v1
kind: Service
metadata:
  name: beiqin-db-service
  labels:
    app: beiqin-db-service
spec:
  selector:
    app: beiqin-db-deploy
  ports:
  - port: 3310
    targetPort: 3306

部署app

# beiqin-app-deploy
apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: beiqin-app-deploy
spec:
  replicas: 3
  template:
    metadata:
      labels:
        app: beiqin-app-deploy
    spec:
      volumes:
      - name : beqin-app-volume
        hostPath:
          path: /usr/local/beiqin        # 宿主机路径，对应nfs映射的位置
      containers:
      - name: beiqin-app-deploy
        image: openjdk:8u222-jre
        command: ["/bin/sh"]
        args: ["-c","cd /usr/local/beiqin-dist;java -jar beiqin-app.jar"]
        volumeMounts:
        - name: beqin-app-volume
          mountPath: /usr/local/beiqin-dist  # 容器内挂载位置

# application.yml
server:
  port: 80
spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://beiqin-db-service:3310/beiqin?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: root
  mvc:
    favicon:
      enabled: false
mybatis:
  mapper-locations: classpath:/mapper/*.xml
  configuration:
    map-underscore-to-camel-case: true

验证app部署

kubectl get pods -o wide

NAME                                 READY   STATUS    RESTARTS   AGE   IP            NODE    NOMINATED NODE   READINESS GATES
beiqin-app-deploy-67698c58bc-854s8   1/1     Running   0          19m   10.244.2.12   node2   <none>           <none>
beiqin-app-deploy-67698c58bc-9gfdv   1/1     Running   0          19m   10.244.1.14   node1   <none>           <none>
beiqin-app-deploy-67698c58bc-hjp44   1/1     Running   0          19m   10.244.2.11   node2   <none>           <none>
beiqin-db-deploy-5cccd5fdd7-597g8    1/1     Running   0          62m   10.244.1.12   node1   <none>           <none>
# 通过kubectl logs查看pod的输出log
kubectl logs beiqin-app-deploy-67698c58bc-854s8

# 使用curl测试app是否成功启动
curl 10.244.2.12:80/goods?gid=1788

部署app-service

apiVersion: v1
kind: Service
metadata:
  name: beiqin-app-service
  labels:
    app: beiqin-app-service
spec:
  selector:
    app: beiqin-app-deploy
  ports:
  - port: 80
    targetPort: 80

使用curl测试service
curl 10.97.185.8:80/goods?gid=1788

使用rinetd映射地址

vi /etc/rinetd.conf
0.0.0.0 80 10.97.185.8 80

# 启动rinetd
sudo rinetd -c /etc/rinetd.conf

# 在浏览器中使用master地址访问页面
http://192.168.121.150/goods?gid=1789