我正在学习docker。在部署我的应用程序（Angular，SpringBoot，RabbitMQ，MySQL）时，我能够访问UI，但是由于服务与MySQL和RabbitMq之间的连接错误而导致服务失败。但是单独地，我能够通过docker exec命令访问MySql和RabbitMq，同时在docker-compose期间生成表和队列。但是在测试时，它不起作用
docker-compose.yml
version: '3.1'
services:
rabbitmq:
image: rabbitmq:management
ports:
- 5672:5672
- 15672:15672
mysql:
image: mysql:8.0.17
ports:
- 3306:3306
environment:
MYSQL_DATABASE: stackroute
MYSQL_ROOT_PASSWORD: password
MYSQL_USER: cmatches
MYSQL_PASSWORD: cmatches
user-app:
image: userservice
build: userservice/
ports:
- 9100:9100
depends_on:
- mysql
network_mode: "host"
fav-app:
image: favouriteservice
build: favouriteservice/
ports:
- 9200:9200
depends_on:
- mysql
- rabbitmq
network_mode: "host"
rec-app:
image: matchrecommendationservice
build: matchrecommendationservice/
ports:
- 9300:9300
depends_on:
- mysql
- rabbitmq
network_mode: "host"
cmatches-ui:
build: CMatchesUI/
container_name: cmatchesUi
ports:
- 4200:4200
单个dockerfile运行正常。
错误：
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
我需要在application.properties中进行一些更改
server.port=9200
spring.datasource.url=jdbc:mysql://localhost:3306/stackroute?verifyServerCertificate=false&useSSL=false&requireSSL=false&allowPublicKeyRetrieval=true
spring.datasource.username=root
spring.datasource.password=password
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
spring.jpa.hibernate.ddl-auto = update
spring.rabbitmq.host=localhost
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
spring.cloud.stream.bindings.recommendedMatchesChannel.destination=recommendedMatches
spring.cloud.stream.default.contentType=application/json
================================================ ========================更新：1。尝试改变spring.datasource.url = jdbc：mysql：// mysql：3306 / stackroute？verifyServerCertificate = false＆useSSL = false＆requireSSL = false＆allowPublicKeyRetrieval = true得到以下错误：造成原因：java.net.UnknownHostException：mysql
-还原-
2。删除network_mode：主机出现以下错误
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
user-app_1 |
user-app_1 | The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
user-app_1 | at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:827) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:447) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:237) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:136) ~[HikariCP-3.2.0.jar!/:na]
user-app_1 | at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:369) ~[HikariCP-3.2.0.jar!/:na]
user-app_1 | at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:198) ~[HikariCP-3.2.0.jar!/:na]
user-app_1 | at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:467) [HikariCP-3.2.0.jar!/:na]
user-app_1 | at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:541) [HikariCP-3.2.0.jar!/:na]
user-app_1 | at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) [HikariCP-3.2.0.jar!/:na]
user-app_1 | at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) [HikariCP-3.2.0.jar!/:na]
user-app_1 | at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:180) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:68) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:94) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:179) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:119) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:904) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:935) [hibernate-core-5.3.7.Final.jar!/:5.3.7.Final]
user-app_1 | at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:57) [spring-orm-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) [spring-orm-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:390) [spring-orm-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:377) [spring-orm-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) [spring-orm-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1804) [spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1741) [spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576) [spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) [spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) [spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) [spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) [spring-beans-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1083) ~[spring-context-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:853) ~[spring-context-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) ~[spring-context-5.1.4.RELEASE.jar!/:5.1.4.RELEASE]
user-app_1 | at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
user-app_1 | at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
user-app_1 | at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
user-app_1 | at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
user-app_1 | at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
user-app_1 | at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) ~[spring-boot-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]
user-app_1 | at com.stackroute.userservice.UserServiceApplication.main(UserServiceApplication.java:10) ~[classes!/:1.0]
user-app_1 | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_111]
user-app_1 | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_111]
user-app_1 | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_111]
user-app_1 | at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_111]
user-app_1 | at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) ~[userservice-1.0.jar:1.0]
user-app_1 | at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) ~[userservice-1.0.jar:1.0]
user-app_1 | at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) ~[userservice-1.0.jar:1.0]
user-app_1 | at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51) ~[userservice-1.0.jar:1.0]
user-app_1 | Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
user-app_1 |
user-app_1 | The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
user-app_1 | at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_111]
user-app_1 | at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_111]
user-app_1 | at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_111]
user-app_1 | at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_111]
user-app_1 | at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.NativeSession.connect(NativeSession.java:150) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:947) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:817) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | ... 57 common frames omitted
user-app_1 | Caused by: java.net.ConnectException: Connection refused (Connection refused)
user-app_1 | at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_111]
user-app_1 | at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_111]
user-app_1 | at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_111]
user-app_1 | at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_111]
user-app_1 | at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_111]
user-app_1 | at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_111]
user-app_1 | at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
user-app_1 | ... 60 common frames omitted
由于应用程序在docker容器中运行，因此您不能使用localhost作为主机名。另外，为了彼此通信，所有容器都应该在同一个docker网络中；
version: '3.1'
services:
rabbitmq:
image: rabbitmq:management
container_name: rabbitmq
ports:
- 5672:5672
- 15672:15672
networks:
- my-net
mysql:
image: mysql:8.0.17
container_name: mysql
ports:
- 3306:3306
environment:
MYSQL_DATABASE: stackroute
MYSQL_ROOT_PASSWORD: password
MYSQL_USER: cmatches
MYSQL_PASSWORD: cmatches
networks:
- my-net
user-app:
image: userservice
build: userservice/
container_name: userapp
ports:
- 9100:9100
depends_on:
- mysql
networks:
- my-net
fav-app:
image: favouriteservice
build: favouriteservice/
container_name: favapp
ports:
- 9200:9200
depends_on:
- mysql
- rabbitmq
networks:
- my-net
rec-app:
image: matchrecommendationservice
build: matchrecommendationservice/
container_name: recapp
ports:
- 9300:9300
depends_on:
- mysql
- rabbitmq
networks:
- my-net
cmatches-ui:
build: CMatchesUI/
container_name: cmatchesUi
ports:
- 4200:4200
networks:
- my-net
networks:
my-net:
将主机名在所有位置替换为它们各自的容器名称；
server.port=9200
spring.datasource.url=jdbc:mysql://mysql:3306/stackroute?verifyServerCertificate=false&useSSL=false&requireSSL=false&allowPublicKeyRetrieval=true
spring.datasource.username=root
spring.datasource.password=password
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
spring.jpa.hibernate.ddl-auto = update
spring.rabbitmq.host=rabbitmq
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
spring.cloud.stream.bindings.recommendedMatchesChannel.destination=recommendedMatches
spring.cloud.stream.default.contentType=application/json
我认为这是因为您使用了network_mode = host
这意味着您想“重用”底层主机网络中的名称空间。
尝试使用默认的“桥接”模式，以便docker在容器之间创建一个“虚拟网络”。
此桥接模式是默认模式，因此只需从docker compose文件中删除network_mode: "host"行。
Here是一个很好的教程，从较高的角度描述了Docker网络的支持。