Docker Spring Boot with MySQL database, connection refused - mysql

Question

I try to connect from my Spring Boot Container to a MySQL database but the connection breaks
This is my compose file.
version: "3.8"
services:
myapi:
image: myapi:local
container_name: myapi
build:
context: ./../
dockerfile: ./docker/Dockerfile
ports:
- 5000:5000
depends_on:
- mysql
environment:
- SERVER_PORT=5000
- SPRING_DATASOURCE_URL=jdbc:mysql://mysql:3306/testdb
- SPRING_DATASOURCE_USERNAME=admindev
- SPRING_DATASOURCE_PASSWORD=admindev
- SPRING_DATASOURCE_DRIVER_CLASS_NAME=com.mysql.cj.jdbc.Driver
- SPRING_JPA_HIBERNATE_DDL_AUTO=update
- SPRING_JPA_DATABASE_PLATFORM=org.hibernate.dialect.MySQL5InnoDBDialect
volumes:
- mysql-data:/var/lib/mysql
mysql:
image: mysql:8
container_name: mysql
restart: always
ports:
- 5001:3306
environment:
- MYSQL_ROOT_PASSWORD=1234
- MYSQL_USER=admindev
- MYSQL_PASSWORD=admindev
- MYSQL_DATABASE=testdb
volumes:
mysql-data:
driver: local
The MySQL container starts and it's waiting for connections.
The application also starts, but when it tries to connect to the DB it breaks.
I can't find anything wrong with the docker-compose file. I looked over the documentation and I saw that in the data source URL, I can even omit the port.
UPDATE
mysql container logs:
2021-03-05 13:20:21+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.23-1debian10 started.
2021-03-05 13:20:21+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
2021-03-05 13:20:21+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.23-1debian10 started.
2021-03-05 13:20:21+00:00 [Note] [Entrypoint]: Initializing database files
2021-03-05T13:20:21.662023Z 0 [System] [MY-013169] [Server] /usr/sbin/mysqld (mysqld 8.0.23) initializing of server in progress as process 42
2021-03-05T13:20:21.675007Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-03-05T13:20:22.643221Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-03-05T13:20:24.871463Z 6 [Warning] [MY-010453] [Server] root#localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.
2021-03-05 13:20:29+00:00 [Note] [Entrypoint]: Database files initialized
2021-03-05 13:20:29+00:00 [Note] [Entrypoint]: Starting temporary server
2021-03-05T13:20:29.854747Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.23) starting as process 87
2021-03-05T13:20:29.882866Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-03-05T13:20:30.177247Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-03-05T13:20:30.340904Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: /var/run/mysqld/mysqlx.sock
2021-03-05T13:20:30.477364Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-03-05T13:20:30.477747Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-03-05T13:20:30.482566Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
2021-03-05T13:20:30.505587Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.23' socket: '/var/run/mysqld/mysqld.sock' port: 0 MySQL Community Server - GPL.
2021-03-05 13:20:30+00:00 [Note] [Entrypoint]: Temporary server started.
Warning: Unable to load '/usr/share/zoneinfo/iso3166.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/leap-seconds.list' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone1970.tab' as time zone. Skipping it.
2021-03-05 13:20:33+00:00 [Note] [Entrypoint]: Creating database thesis
2021-03-05 13:20:33+00:00 [Note] [Entrypoint]: Creating user admindev
2021-03-05 13:20:33+00:00 [Note] [Entrypoint]: Giving user admindev access to schema thesis
2021-03-05 13:20:33+00:00 [Note] [Entrypoint]: Stopping temporary server
2021-03-05T13:20:33.332383Z 13 [System] [MY-013172] [Server] Received SHUTDOWN from user root. Shutting down mysqld (Version: 8.0.23).
2021-03-05T13:20:35.763423Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.23) MySQL Community Server - GPL.
2021-03-05 13:20:36+00:00 [Note] [Entrypoint]: Temporary server stopped
2021-03-05 13:20:36+00:00 [Note] [Entrypoint]: MySQL init process done. Ready for start up.
2021-03-05T13:20:36.568558Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.23) starting as process 1
2021-03-05T13:20:36.580255Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-03-05T13:20:36.776157Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-03-05T13:20:36.885922Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
2021-03-05T13:20:36.950707Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-03-05T13:20:36.950893Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-03-05T13:20:36.956239Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
2021-03-05T13:20:36.971274Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.23' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server - GPL.
myapi container logs:
2021-03-05 13:23:09.481 INFO 1 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFERRED mode.
2021-03-05 13:23:09.566 INFO 1 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 74ms. Found 1 JPA repository interfaces.
2021-03-05 13:23:10.186 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler#2eee3069' of type [org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-03-05 13:23:10.194 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'methodSecurityMetadataSource' of type [org.springframework.security.access.method.DelegatingMethodSecurityMetadataSource] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-03-05 13:23:10.714 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 5000 (http)
2021-03-05 13:23:10.732 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-03-05 13:23:10.732 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.38]
2021-03-05 13:23:10.828 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/api] : Initializing Spring embedded WebApplicationContext
2021-03-05 13:23:10.828 INFO 1 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2738 ms
2021-03-05 13:23:11.152 INFO 1 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-03-05 13:23:11.222 INFO 1 --- [ task-1] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-03-05 13:23:11.289 WARN 1 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2021-03-05 13:23:11.320 INFO 1 --- [ task-1] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.21.Final
2021-03-05 13:23:11.606 INFO 1 --- [ task-1] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2021-03-05 13:23:11.782 INFO 1 --- [ task-1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-03-05 13:23:12.386 INFO 1 --- [ main] o.s.s.web.DefaultSecurityFilterChain : Creating filter chain: any request, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter#5649ec46, org.springframework.security.web.context.SecurityContextPersistenceFilter#3e598df9, org.springframework.security.web.header.HeaderWriterFilter#7f9e1534, org.springframework.web.filter.CorsFilter#78dc4696, org.springframework.security.web.authentication.logout.LogoutFilter#79b663b3, stefan.buciu.config.filter.AuthenticationFilter#502f8b57, stefan.buciu.config.filter.AuthorizationFilter#5652f555, org.springframework.security.web.savedrequest.RequestCacheAwareFilter#99a65d3, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter#6813a331, org.springframework.security.web.authentication.AnonymousAuthenticationFilter#4fe01805, org.springframework.security.web.session.SessionManagementFilter#81ff872, org.springframework.security.web.access.ExceptionTranslationFilter#5f8890c2]
2021-03-05 13:23:13.038 ERROR 1 --- [ task-1] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization.
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.21.jar!/:8.0.21]
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.21.jar!/:8.0.21]
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836) ~[mysql-connector-java-8.0.21.jar!/:8.0.21]
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456) ~[mysql-connector-java-8.0.21.jar!/:8.0.21]
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) ~[mysql-connector-java-8.0.21.jar!/:8.0.21]
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197) ~[mysql-connector-java-8.0.21.jar!/:8.0.21]
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-3.4.5.jar!/:na]
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358) ~[HikariCP-3.4.5.jar!/:na]
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-3.4.5.jar!/:na]
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477) ~[HikariCP-3.4.5.jar!/:na]
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:560) ~[HikariCP-3.4.5.jar!/:na]
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-3.4.5.jar!/:na]
at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-3.4.5.jar!/:na]
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:180) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:68) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:176) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:118) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1224) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1255) ~[hibernate-core-5.4.21.Final.jar!/:5.4.21.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.2.9.RELEASE.jar!/:5.2.9.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.2.9.RELEASE.jar!/:5.2.9.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391) ~[spring-orm-5.2.9.RELEASE.jar!/:5.2.9.RELEASE]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
my application.yml file:
spring:
datasource:
username: admindev
password: admindev
url: jdbc:mysql://localhost:3306/testdb
driver-class-name: com.mysql.cj.jdbc.Driver
jpa:
hibernate:
ddl-auto: update
database-platform: org.hibernate.dialect.MySQL5InnoDBDialect
server:
port: 5000
servlet:
contextPath: /api
I also thought of attaching the Dockerfile:
FROM openjdk:11-jdk-slim
RUN mkdir -p /home/app
COPY ./target/*.jar /home/app/application.jar
WORKDIR /home/app
CMD ["java", "-jar", "application.jar"]
In the COPY command I used a star because there is only one *.jar produce by maven, and I didn't want to always change my Dockerfile when I change my version. That command works if there is only one file.
The artefacts are built using mvn package and I had no errors there, if I run myself the command: java -jar *.jar in the target dir, the server starts running without any problems.