[英]Could not create connection to database server via Docker
I have created a simple spring boot app to communicate with MYSQL via docker using the same network.我创建了一个简单的 Spring Boot 应用程序,通过 docker 使用相同的网络与 MYSQL 进行通信。 Once I run docker-compose up
command then following errors have occurred一旦我运行docker-compose up
命令,就会发生以下错误
employee-jdbc-container |员工-jdbc-容器| java.sql.SQLNonTransientConnectionException: Could not create connection to database server. java.sql.SQLNonTransientConnectionException:无法创建到数据库服务器的连接。 Attempted reconnect 3 times.尝试重新连接 3 次。 Giving up.放弃。
employee-jdbc-container |员工-jdbc-容器| Caused by: com.mysql.cj.exceptions.UnableToConnectException: Public Key Retrieval is not allowed引起:com.mysql.cj.exceptions.UnableToConnectException: Public Key Retrieval is not allowed
docker-compose.yml docker-compose.yml
version: "3"
services:
employee-mysql:
image: employee-jdbc
container_name: employee-jdbc-container
ports:
- "9090:9090"
networks:
- employee-mysql2
depends_on:
- mysqldb
mysqldb:
image: mysql:8
container_name: mysqldb
ports:
- "3306:3306"
networks:
- employee-mysql2
environment:
- MYSQL_USER=root
- MYSQL_ROOT_PASSWORD=root
- MYSQL_DATABASE=HR
networks:
employee-mysql2:
application.yml应用程序.yml
server:
port: 9090
spring:
datasource:
url: "jdbc:mysql://mysqldb:3306/HR?createDatabaseIfNotExists=true&autoReconnect=true&useSSL=false"
username: root
password: root
platform: mysql
initialization-mode: always
driver-class-name: com.mysql.cj.jdbc.Driver
jpa:
database-platform: org.hibernate.dialect.MySQL8Dialect
I think the problem in the configuration file but have no idea what is wrong.我认为是配置文件中的问题,但不知道出了什么问题。
finally, I have found another way to run both containers without any issue.最后,我找到了另一种运行两个容器的方法,没有任何问题。
first set MySQL environment首先设置MySQL环境
docker pull mysql:8码头工人拉mysql:8
then run the image as a container然后将图像作为容器运行
docker container run -d --name mysql-db -e MYSQL_ROOT_PASSWORD=<root_password> -e MYSQL_DATABASE=<database_name>
-e MYSQL_USER=<user> -e MYSQL_PASSWORD=<password> mysql:8(image name with version)
second set spring boot environment第二套spring boot环境
application.yml应用程序.yml
server:
port: 9090
spring:
datasource:
url: "jdbc:mysql://mysql-db/<database_name>?createDatabaseIfNotExists=true&autoReconnect=true&allowPublicKeyRetrieval=true&useSSL=false"
username: <username>
password: <password>
initialization-mode: always
driver-class-name: com.mysql.cj.jdbc.Driver
tomcat:
test-while-idle: true
validation-query: SELECT 1
jpa:
database-platform: org.hibernate.dialect.MySQL8Dialect
show-sql: true
hibernate:
ddl-auto: update
Docker file Docker 文件
FROM openjdk:11
COPY ./target/employee-mysql.jar employee-mysql.jar
EXPOSE <port number> (where your application is running)
ENTRYPOINT ["java","-jar","employee-mysql.jar"]
build a docker image for spring boot app为 Spring Boot 应用程序构建一个 docker 镜像
docker image build -t employee-jdbc . docker 镜像构建 -t 员工-jdbc。
run the employee-jdbc image as a container将employee-jdbc 镜像作为容器运行
docker container run -d --name employee-mysql -p 9090:9090 --link mysql-db:mysql(mysql is the image of mysql-db container) employee-jdbc(employee-jdbc is the image of employee-mysql container)
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