如何在Kubernetes上部署使用postgres数据库的Spring Boot应用程序?

本文介绍了如何在Kubernetes上部署使用postgres数据库的Spring Boot应用程序?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我使用此命令部署了我的spring boot应用程序

I used this command to deploy my spring boot application

sudo kubectl run mykubernetes-springboot --image=glgelopfalcon/springboot_docker_maven:0.0.1-SNAPSHOT --port=8080

已创建部门，但是当我通过

Deplyment is created but when i check logs by

kubectl logs pod podname

它给出了例外

Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

我在本地计算机上安装了postgres.

I installed postgres on my local machine.

测试是否有答案 postgres.yaml

Test for semah answer postgres.yaml

kind: Service apiVersion: v1 metadata: name: postgres-svc namespace: default spec: type: ExternalName externalName: 10.0.2.2

kubectl get svc提供

kubectl get svc gives

postgres-svc ExternalName <none> 10.0.2.2 <none> 2m12s

Spring Boot应用程序部署日志提供

Spring boot app deployement logs give

IOException occurred while connecting to postgres-svc.external.svc:5432 java.UnknownHostException: postgres-svc.external.svc

推荐答案

如果您尝试连接到安装在本地计算机而不是kubernetes中的数据库，则出现此错误是正常现象，因为pod内的localhost并不意味着您的本地机器，那么您能知道您的数据库在哪里运行吗?

If you are trying to connect to DB installed on your local machine and not in kubernetes it is normal to have this error because localhost inside pod this not means your local machine , so can you tell where your db is running ?

在确认您在本地运行时尝试此操作:

try this as you confirmed that you run in local :

apiVersion: v1 kind: Service metadata: name: mysql-db-svc spec: ports: - port: 5432

并将端点添加到此服务:

and add endpoint to this service :

apiVersion: v1 kind: Endpoints metadata: name: mysql-db-svc subsets: - addresses: - ip: 10.0.2.2 ports: - port: 5432

然后使用:

url=jdbc:postgresql://mysql-db-svc/databasename