docker-compose：spring-boot web服務訪問postgres數據庫服務

在我的docker-compose.yal文件中，我定義了一個基於spring-boot的web服務和一個postgresql數據庫服務。 Web服務引用數據庫服務，併爲數據庫數據源URL提供一個環境變量，以便引用數據庫服務的主機名。這是什麼樣子：docker-compose：spring-boot web服務訪問postgres數據庫服務

version: '3' 
services: 

    web: 
    container_name: medmap-server 
    hostname: medmap-server 
    build: ../../../build/docker 
    ports: ["8090:8090"] 
    links: 
     - db:database 
    environment: 
     - spring.datasource.url=jdbc:postgresql://medmap-db:5433/medmapdb 
     - spring.datasource.username=docker 
     - spring.datasource.password=docker  
     - logging.level.org.hibernate=DEBUG 

    db: 
    container_name: medmap-db 
    hostname: medmap-db 
    image: postgres:9.6.2 
    ports: 
     - "5433:5433" 
    volumes: 
     - /var/lib/medmap/data 
    environment: 
     - POSTGRES_PASSWORD=docker 
     - POSTGRES_USER=docker 
     - POSTGRES_DB=medmapdb 
     - PGDATA=/var/lib/medmap/data/pgdata

當我開始使用docker-compose up我收到以下錯誤該應用程序：

medmap-server | Caused by: org.postgresql.util.PSQLException: Connection to medmap-db:5433 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections 
. 
medmap-server |   at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:239) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:127) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:29) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:21) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:41) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.postgresql.Driver.makeConnection(Driver.java:414) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.postgresql.Driver.connect(Driver.java:282) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:310) ~[tomcat-jdbc-8.5.11.jar!/:na] 
medmap-server |   at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:203) ~[tomcat-jdbc-8.5.11.jar!/:na] 
medmap-server |   at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:732) ~[tomcat-jdbc-8.5.11.jar!/:na] 
medmap-server |   at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:664) ~[tomcat-jdbc-8.5.11.jar!/:na] 
medmap-server |   at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:479) ~[tomcat-jdbc-8.5.11.jar!/:na] 
medmap-server |   at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:154) ~[tomcat-jdbc-8.5.11.jar!/:na] 
medmap-server |   at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118) ~[tomcat-jdbc-8.5.11.jar!/:na] 
medmap-server |   at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107) ~[tomcat-jdbc-8.5.11.jar!/:na] 
medmap-server |   at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:131) ~[tomcat-jdbc-8.5.11.jar!/:na] 
medmap-server |   at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) ~[hibernate-core-5.0.12.Final.jar!/: 
5.0.12.Final] 
medmap-server |   at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:180) ~[hibernate-core-5 
.0.12.Final.jar!/:5.0.12.Final] 
medmap-server |   at org.hibernate.tool.schema.extract.internal.ExtractionContextImpl.getJdbcConnection(ExtractionContextImpl.java:62) ~[hibernate-core-5.0.12.Final.jar!/:5.0.12.Final] 
medmap-server |   ... 38 common frames omitted 
medmap-server | Caused by: java.net.ConnectException: Connection refused (Connection refused) 
medmap-server |   at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_121] 
medmap-server |   at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_121] 
medmap-server |   at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_121] 
medmap-server |   at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_121] 
medmap-server |   at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_121] 
medmap-server |   at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_121] 
medmap-server |   at org.postgresql.core.PGStream.<init>(PGStream.java:61) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:121) ~[postgresql-9.4-1200-jdbc41.jar!/:9.4] 
medmap-server |   ... 58 common frames omitted 
medmap-server | 
medmap-server exited with code 1

什麼我不知道的是pg_hba.conf文件的創建，使一個容器中的Web服務訪問另一個容器中的數據庫服務。 TIA對此有任何幫助。

來源

2017-04-22 Farrukh Najmi

什麼在Postgres的日誌？你確定港口嗎？默認是5432，而不是5433 –

好的建議。 Postgresql在5432上運行。謝謝你。 –

的default port for postgres is 5432，試試我的感謝定義它，而不是5433

port (integer) The TCP port the server listens on; 5432 by default. Note that the same port number is used for all IP addresses the server listens on. This parameter can only be set at server start.

來源

2017-04-24 12:47:06

到@ VAO-浚的建議我看看Postgres的端口。

我看着使用盯着在DB服務的conatiner是bash shell在我的數據庫服務使用的Postgres端口：

docker exec -i -t medmap-db /bin/bash

然後在bash shell中執行以下psql的命令：

psql -U postgres -c "SELECT * FROM pg_settings WHERE name = 'port';"

這表明我正在使用端口5432而不是5423，這是我的web服務在它的IDBC URL中使用的名稱，由spring.datasource.url env variabl即

要解決這個問題，我需要在我的數據庫服務中指定PGPORT = 5433 env變量。一個常見的錯誤是假設docker-compose中的ports字段告訴服務應該使用哪個端口。端口字段只是聲明服務使用的端口。您需要以服務特定的方式爲您的服務配置端口（對於postgres，它是env變量PGPORT）。

下面是我的工作泊塢窗修訂，compose.yml文件：

version: '3' 
services: 

    web: 
    container_name: medmap-server 
    hostname: medmap-server 
    build: ../../../build/docker 
    ports: ["8090:8090"] 
    links: 
     - db:database 
    environment: 
     - server.port=8090 
     - spring.datasource.url=jdbc:postgresql://medmap-db:5433/medmapdb 
     - spring.datasource.username=postgres 
     - spring.datasource.password=postgres  
#  - logging.level.org.hibernate=DEBUG 

    db: 
    container_name: medmap-db 
    hostname: medmap-db 
    image: postgres:9.6.2 
    ports: 
     - "5433:5433" 
    volumes: 
     - /var/lib/medmap/data 
    environment: 
     - POSTGRES_PASSWORD=postgres 
     - POSTGRES_USER=postgres 
     - POSTGRES_DB=medmapdb 
     - PGDATA=/var/lib/medmap/data/pgdata 
     - PGPORT=5433

來源

2017-04-24 12:53:43

docker-compose：spring-boot web服務訪問postgres數據庫服務

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