舵图：wordpress部署问题到达mariadb

Question

我无法使用Rancher目录和Bitnami/Wordpress掌舵图部署Wordpress。MariaDB pod运行良好，但wordpress pod错误为

复制集“WordPress-557FCB8469”进度超时。；部署没有最低可用性。

同样来自wordpress pod日志：

执行“安装后”时出错：尝试36次后无法连接到WordPress-Mariadb:3306

I have no name!@wordpress-557fcb8469-gj585:/$ mysql -h wordpress-mariadb -u root -p
Enter password: 
ERROR 2005 (HY000): Unknown MySQL server host 'wordpress-mariadb' (-3)

I have no name!@wordpress-557fcb8469-gj585:/$ mysql -h 10.42.0.8 -u root -p
Enter password: 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 16597
Server version: 10.3.22-MariaDB Source distribution

赫尔姆和库伯内特斯的版本：

version.BuildInfo{Version:"v3.2.4", GitCommit:"0ad800ef43d3b826f31a5ad8dfbb4fe05d143688", GitTreeState:"clean", GoVersion:"go1.13.12"}

Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.6", GitCommit:"d32e40e20d167e103faf894261614c5b45c44198", GitTreeState:"clean", BuildDate:"2020-05-20T13:16:24Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.3", GitCommit:"2e7996e3e2712684bc73f0dec0200d64eec7fe40", GitTreeState:"clean", BuildDate:"2020-05-20T12:43:34Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}

WordPress命名空间中的POD和服务：

> kubectl get pods,svc -owide --namespace=wordpress
    NAME                             READY   STATUS    RESTARTS   AGE    IP           NODE            NOMINATED NODE   READINESS GATES
    pod/wordpress-6647794f9b-4mmxd   0/1     Running   20         104m   10.42.0.19   dev-app   <none>           <none>
    pod/wordpress-mariadb-0          1/1     Running   1          26h    10.42.0.14   dev-app   <none>           <none>
    
    NAME                        TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)                      AGE   SELECTOR
    service/wordpress           LoadBalancer   10.43.91.13     <pending>     80:30158/TCP,443:30453/TCP   26h   app.kubernetes.io/instance=wordpress,app.kubernetes.io/name=wordpress,io.cattle.field/appId=wordpress
    service/wordpress-mariadb   ClusterIP      10.43.178.123   <none>        3306/TCP                     26h   app=mariadb,component=master,io.cattle.field/appId=wordpress,release=wordpress

Answer 1

未知的MySQL服务器主机“WordPress-MariaDB”（-3）

该错误表示DNS失败。请检查CoreDNS配置。检查CoreDNS日志中的任何错误。CoreDNS将外部查询转发到带下划线的节点。请同时检查/etc/resolv.conf中的节点DNS配置。