mysql - kubernetes 无法连接 mysql

Question

我已经在 kubernetes 中部署了一个 mysql 数据库并通过服务公开。当我的应用程序尝试连接到该数据库时，它一直被拒绝。当我尝试在本地访问它时，我也会得到同样的结果。 Kubernetes 节点在 minikube 中运行。

apiVersion: v1
kind: Service
metadata:
  name: mysql-service
spec:
  type: NodePort
  selector:
    app: mysql
  ports:
  - port: 3306
    protocol: TCP
    targetPort: 3306
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql-deployment
  labels:
    app: mysql
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - name: mysql
        image: mysql_db
        imagePullPolicy: Never
        ports:
        - containerPort: 3306
        volumeMounts:
        - name:  mysql-persistent-storage
          mountPath:  "/var/lib/mysql"
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim

这是我用于持久存储的 yaml:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: mysql-pv-volume
  labels:
    type: local
spec: 
  storageClassName: manual
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/Users/Work/data"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi

在此之后，我通过运行 minikube service list 得到这个:

default              | mysql-service             | http://192.168.99.101:31613 

但是，我无法从我的应用程序或本地计算机访问数据库。我缺少什么或者我配置错误吗？

编辑:我在这里没有定义任何环境，因为 docker 运行的镜像已经是一个正在运行的 mysql 数据库，并且一些脚本也在 docker 镜像中运行。

Answer 1

Mysql肯定没有启动，通过检查日志确认。 kubectl get pods | grep mysql ; kubectl logs -f $POD_ID 。请记住，您必须指定环境变量 MYSQL_DATABASE 和 MYSQL_ROOT_PASSWORD 才能启动 mysql。如果您不想为 root 设置密码，请指定相应的命令。这里我给你一个mysql yaml的例子。

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql-deployment
  labels:
    app: mysql
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - name: mysql
        image: mysql_db
        imagePullPolicy: Never
        env:
        - name: MYSQL_DATABASE
          value: main_db
        - name: MYSQL_ROOT_PASSWORD
          value: s4cur4p4ss
        ports:
        - containerPort: 3306
        volumeMounts:
        - name:  mysql-persistent-storage
          mountPath:  "/var/lib/mysql"
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim