Question

我设置了一系列VM 192.168.2.(100,105,101,104)，其中kubernetes主服务器位于100上，而两个工作服务器位于101,104上。还要在192.168.2.105上设置postgres，然后在this tutorial上设置，但仍然无法从内部访问。在将minikube和postgres安装在同一VM的测试VM内的minikube中进行了尝试，效果很好。

将发布者配置文件从localhost更改为*，将pg_hba.conf上的监听更改为0.0.0.0/0

在虚拟机192.168.2.105:5432中安装了postgesql-12和postgresql-client-12，现在我向kubernetes添加了headless服务，如下所示

apiVersion: v1
kind: Service
metadata:
    name: my-service
spec:
    ports:
        - protocol: TCP
          port: 5432
          targetPort: 5432
------
apiVersion: v1
kind: Endpoints
metadata:
    name: my-service
subsets:
    - addresses:
        - ip: 192.168.2.105
      ports:
        - port: 5432

在我的部署中，我正在定义它来访问数据库

apiVersion: v1
kind: Service
metadata:
  name: keycloak
  labels:
    app: keycloak
spec:
  ports:
  - name: http
    port: 8080
    targetPort: 8080
  selector:
    app: keycloak
  type: LoadBalancer
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: keycloak
  namespace: default
  labels:
    app: keycloak
spec:
  replicas: 1
  selector:
    matchLabels:
      app: keycloak
  template:
    metadata:
      labels:
        app: keycloak
    spec:
      containers:
      - name: keycloak
        image: quay.io/keycloak/keycloak:11.0.0
        env:
        - name: KEYCLOAK_USER
          value: "admin"
        - name: KEYCLOAK_PASSWORD
          value: "admin"
        - name: PROXY_ADDRESS_FORWARDING
          value: "true"
        - name: DB_ADDR
          value: 'my-service:5432'
        - name: DB_DATABASE
          value: postgres
        - name: DB_PASSWORD
          value: admin
        - name: DB_SCHEMA
          value: public
        - name: DB_USER
          value: postgres
        - name: DB_VENDOR
          value: POSTGRES
        ports:
        - name: http
          containerPort: 8080
        - name: https
          containerPort: 8443
        readinessProbe:
          httpGet:
            path: /auth/realms/master
            port: 8080

此外，虚拟机是桥接的，而不是在NAT上。

我在这里做错了什么？

Answer 1

我们要做的第一件事是使用自定义端点创建无头服务。解决方案中的 IP 仅适用于我的计算机。

具有服务的端点：

apiVersion: v1
kind: Service
metadata:
  name: postgres-service
spec:
  ports:
    - protocol: TCP
      port: 5432
      targetPort: 5432
---
apiVersion: v1
kind: Endpoints
metadata:
  name: postgres-service
subsets:
  - addresses:
      - ip: 192.168.2.105
    ports:
      - port: 5432

对于我的特定规格，我尚未定义任何入口或负载平衡器，因此在部署服务后，我会将选择器类型从服务中的 LoadBalancer 更改为 NodePort

现在，我使用上述.yaml文件部署了密钥斗篷

apiVersion: v1
kind: Service
metadata:
  name: keycloak
  labels:
    app: keycloak
spec:
  ports:
    - name: http
      port: 8080
      targetPort: 8080
    - name: https
      port: 8443
      targetPort: 8443
  selector:
    app: keycloak
  type: NodePort
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: keycloak
  namespace: default
  labels:
    app: keycloak
spec:
  replicas: 1
  selector:
    matchLabels:
      app: keycloak
  template:
    metadata:
      labels:
        app: keycloak
    spec:
      containers:
        - name: keycloak
          image: quay.io/keycloak/keycloak:11.0.0
          env:
            - name: KEYCLOAK_USER
              value: "admin" # TODO give username for master realm
            - name: KEYCLOAK_PASSWORD
              value: "admin" # TODO give password for master realm
            - name: PROXY_ADDRESS_FORWARDING
              value: "true"
            - name: DB_ADDR
              value: # <Node-IP>:<LoadBalancer-Port/ NodePort>
            - name: DB_DATABASE
              value: "keycloak" # Database to use
            - name: DB_PASSWORD
              value: "admin" # Database password
            - name: DB_SCHEMA
              value: public
            - name: DB_USER
              value: "postgres" # Database user
            - name: DB_VENDOR
              value: POSTGRES
          ports:
            - name: http
              containerPort: 8080
            - name: https
              containerPort: 8443
          readinessProbe:
            httpGet:
              path: /auth/realms/master
              port: 8080

提及所有可能的值后，它成功连接到托管在远离kubernetes主节点和工作节点的另一台服务器上的postgres服务器！

从Kubernetes集群内部连接到Postgresql

1 个答案: