無法將Dockerized Spring Boot應用程序連接到Dockerized Postgre SQL

Question

我有一個帶有兩項服務的docker-compose.yml：

version: '2'
services:

  stuffer:
    container_name: stuffer_container
    build: .
    ports:
     - "8080:8080"
    environment:
     - spring.profiles.active=dev
    depends_on:
     - postgreDB

  postgreDB:
    container_name: postgreDB_container
    image: "postgres:9.6.2"
    ports:
     - "5432:5432"
    expose:
     - "5432"
    environment:
     - POSTGRES_DB=stuffer
     - POSTGRES_USER=postgres
     - POSTGRES_PASSWORD=root123
    volumes:
     - /home/iwaneez/postgreData:/var/lib/postgresql/data

我的應用程序具有application-dev.properties：

## Datasource config
spring.datasource.driver-class-name=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://postgreDB:5432/stuffer
spring.datasource.username=postgres
spring.datasource.password=root123

當我運行它們都使用

碼頭工人組成

我收到連接被拒絕的異常：

stuffer_container | Caused by: org.springframework.jdbc.datasource.init.UncategorizedScriptException: Failed to execute database script; nested exception is org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
stuffer_container |     at org.springframework.jdbc.datasource.init.DatabasePopulatorUtils.execute(DatabasePopulatorUtils.java:60) ~[spring-jdbc-4.3.7.RELEASE.jar!/:4.3.7.RELEASE]
stuffer_container |     at org.springframework.boot.autoconfigure.jdbc.DataSourceInitializer.runScripts(DataSourceInitializer.java:192) ~[spring-boot-autoconfigure-1.5.2.RELEASE.jar!/:1.5.2.RELEASE]
stuffer_container |     at org.springframework.boot.autoconfigure.jdbc.DataSourceInitializer.runSchemaScripts(DataSourceInitializer.java:92) ~[spring-boot-autoconfigure-1.5.2.RELEASE.jar!/:1.5.2.RELEASE]
stuffer_container |     at org.springframework.boot.autoconfigure.jdbc.DataSourceInitializer.init(DataSourceInitializer.java:83) ~[spring-boot-autoconfigure-1.5.2.RELEASE.jar!/:1.5.2.RELEASE]
stuffer_container |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
stuffer_container |     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]
stuffer_container |     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]
stuffer_container |     at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
stuffer_container |     at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.7.RELEASE.jar!/:4.3.7.RELEASE]
stuffer_container |     at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:311) ~[spring-beans-4.3.7.RELEASE.jar!/:4.3.7.RELEASE]
stuffer_container |     at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:134) ~[spring-beans-4.3.7.RELEASE.jar!/:4.3.7.RELEASE]
stuffer_container |     ... 61 common frames omitted
stuffer_container | Caused by: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
stuffer_container |     at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80) ~[spring-jdbc-4.3.7.RELEASE.jar!/:4.3.7.RELEASE]
stuffer_container |     at org.springframework.jdbc.datasource.init.DatabasePopulatorUtils.execute(DatabasePopulatorUtils.java:46) ~[spring-jdbc-4.3.7.RELEASE.jar!/:4.3.7.RELEASE]
stuffer_container |     ... 71 common frames omitted
stuffer_container | Caused by: org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
stuffer_container |     at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:138) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:22) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:32) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.postgresql.Driver.makeConnection(Driver.java:393) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.postgresql.Driver.connect(Driver.java:267) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:310) ~[tomcat-jdbc-8.5.11.jar!/:na]
stuffer_container |     at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:203) ~[tomcat-jdbc-8.5.11.jar!/:na]
stuffer_container |     at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:732) ~[tomcat-jdbc-8.5.11.jar!/:na]
stuffer_container |     at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:664) ~[tomcat-jdbc-8.5.11.jar!/:na]
stuffer_container |     at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:479) ~[tomcat-jdbc-8.5.11.jar!/:na]
stuffer_container |     at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:154) ~[tomcat-jdbc-8.5.11.jar!/:na]
stuffer_container |     at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118) ~[tomcat-jdbc-8.5.11.jar!/:na]
stuffer_container |     at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107) ~[tomcat-jdbc-8.5.11.jar!/:na]
stuffer_container |     at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:131) ~[tomcat-jdbc-8.5.11.jar!/:na]
stuffer_container |     at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111) ~[spring-jdbc-4.3.7.RELEASE.jar!/:4.3.7.RELEASE]
stuffer_container |     at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77) ~[spring-jdbc-4.3.7.RELEASE.jar!/:4.3.7.RELEASE]
stuffer_container |     ... 72 common frames omitted
stuffer_container | Caused by: java.net.ConnectException: Connection refused (Connection refused)
stuffer_container |     at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_131]
stuffer_container |     at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_131]
stuffer_container |     at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_131]
stuffer_container |     at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_131]
stuffer_container |     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_131]
stuffer_container |     at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_131]
stuffer_container |     at java.net.Socket.connect(Socket.java:538) ~[na:1.8.0_131]
stuffer_container |     at java.net.Socket.<init>(Socket.java:434) ~[na:1.8.0_131]
stuffer_container |     at java.net.Socket.<init>(Socket.java:211) ~[na:1.8.0_131]
stuffer_container |     at org.postgresql.core.PGStream.<init>(PGStream.java:62) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:76) ~[postgresql-9.1-901-1.jdbc4.jar!/:na]
stuffer_container |     ... 91 common frames omitted

如何將應用程序連接到都在docker中運行的postgre？

我也嘗試將ubuntu映像作為第三項服務運行，並且可以使用以下命令成功連接到數據庫

telnet postgreDB 5432

因此看起來像是可見的，但應用仍然無法連接到它。

將數據源的url屬性從postgreDB更改為localhost，例如

spring.datasource.url=jdbc:postgresql://localhost:5432/stuffer

讓我將應用程序從Docker外部連接到postgre，但我需要它們都在docker中運行。

Answer 1

嘗試將數據源設置為jdbc:postgresql://postgreDB:5432/stuffer 。 docker-compose根據提供的別名為每個容器分配一個主機名，或者，如果未指定別名，則使用docker-compose.yml中分配的服務名。 這一切都在由docker主機管理的網絡內。

Answer 2

我設法通過運行來解決問題

docker-compose build 

跑步前

docker-compose up 

問題是有一個舊圖像通過localhost指向postgre。 而且盡管我將config中的主機更改為postgreDB，但是它並不是在up命令期間構建的，正如我從命令手冊中所想到的那樣。 因此，結果沒有變化。

Answer 3

如果僅使用docker運行postgresDB，並且已轉發端口，則postgres在主機OS上可用，並且您可以使用localhost:5432訪問該服務

但是，當您使用docker compose運行時，每個容器都不相同，因此您無法從Spring應用程序容器訪問localhost:5432 。 在這種情況下，postgresDB在單獨的容器中運行，您需要使用容器的IP地址對其進行訪問。

但是當您在服務之間配置了依賴關系時，docker compose為您解決了這個問題，docker compose將在您的容器中添加一個主機條目，這意味着您現在可以從spring應用程序容器中使用postgresDB:5432訪問postgresDB。

查看您的application-dev.properties ，配置看起來正確，但是在docker compose的情況下，包含localhost的數據源URL將不起作用。