如何在kubernetes集群上链接和运行mysql数据库和tomcat服务器? [英] how to link and run mysql database and tomcat server on kubernetes clusture?

问题描述

如何将webapps文件夹中具有war文件的tomcat容器链接到另一个具有mysql数据库的容器.当前，如果我在tomcat Manager应用程序中启动war文件，则会收到错误消息，提示无法在contextpath/data-core-0.0处启动应用程序. 1-SNAPSHOT卡特琳娜生命周期异常.

How to link my tomcat container having war file in webapps folder to another container having mysql database.currently if i start my war file in tomcat manager app i get error saying could not start application at contextpath /data-core-0.0.1-SNAPSHOT catalina lifecycle exception.

我认为我的tomcat容器无法访问mysql数据库容器！

I think my tomcat container cant access the mysql database container!!

statefulset.yaml

statefulset.yaml

serviceName: mysql
 template:
  metadata:
   labels:
    name: mysql
  spec:
   containers:
    - name: mysql
      image: suji165475/vignesh:latest
      ports:
       - containerPort: 3306
      volumeMounts:
       - name: mysql-initdb
         mountPath: /docker-entrypoint-initdb.d
   volumes:
    - name: mysql-initdb
      persistentVolumeClaim:
       claimName: mysql-initdb-pv-claim

persistantvolumeclaim.yaml

persistantvolumeclaim.yaml

kind: PersistentVolume
apiVersion: v1
metadata:
  name: mysql-initdb-pv-volume
  labels:
    type: local
    app: mysql
spec:
  storageClassName: manual
  capacity:
    storage: 1Mi
  accessModes:
    - ReadOnlyMany
  hostPath:
    path: "/tmp/data"

---

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mysql-initdb-pv-claim
  labels:
    app: mysql
spec:
  storageClassName: manual
  accessModes:
    - ReadOnlyMany
  resources:
    requests:
      storage: 1Mi

tomcatdeployment.yaml

tomcatdeployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deployment
  labels:
    app: tomcat
spec:
  replicas: 1
  selector:
    matchLabels:
      app: tomcat
  template:
    metadata:
      labels:
        app: tomcat
    spec:
      containers:
      - name: tomcat
        image: suji165475/vignesh:tomcatserver
        ports:
        - containerPort: 8080

推荐答案

您必须创建mysql服务，并在tomcat服务中使用该服务名称，以便tomcat pod可以与mysql服务器通信.

You have to crate service for mysql and consume that service name in tomcat service so tomcat pod will be able to talk with mysql server.

apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  ports:
  - port: 3306
  selector:
    app: mysql
  clusterIP: None
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql
spec:
  selector:
    matchLabels:
      app: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - image: mysql:5.6
        name: mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: <value>
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim

现在要部署tomcat:

Now deployment for tomcat :

apiVersion: v1
kind: Service
metadata:
  name: tomcat
  labels:
    app: tomcat
spec:
  ports:
  - name: http
    port: 80
    targetPort: 80
  - name: https
    port: 443
    targetPort: 443
  selector:
    app: tomcat
    tier: frontend
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat
  labels:
    app: tomcat
spec:
  selector:
    matchLabels:
      app: tomcat
      tier: frontend
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: tomcat
        tier: frontend
    spec:
      containers:
      - image: <image location>
        name: tomcat
        env:
        - name: DB_PORT_3306_TCP_ADDR
          value: mysql                  #service name of mysql
        - name: DB_ENV_MYSQL_PASSWORD
          value: <Mysql password>
        - name: DB_ENV_MYSQL_USER
          value: <mysql user>
        - name: DB_ENV_MYSQL_DATABASE
          value: <database name>
        - name: DB_ENV_MYSQL_PASSWORD
          value: <Mysql password>
        ports:
        - containerPort: 80
          name: http
        - containerPort: 443
          name: https
        volumeMounts:
        - name: tomcat-persistent-storage
          mountPath: /var/data
      volumes:
      - name: tomcat-persistent-storage
        persistentVolumeClaim:
          claimName: tomcat-pv-claim

这篇关于如何在kubernetes集群上链接和运行mysql数据库和tomcat服务器?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！