如何链接泊坞窗撰写文件（docker-compose.yml）中的容器？

Question

我无法使用docker撰写链接MySQL和播放容器。看到下面的yml文件：

zookeeper: 
    image: zookeeper:3.4 
    ports: 
     - 2181:2181 
kafka: 
    image: ches/kafka:latest 
    ports: 
     - 9092:9092 
    links: 
     - zookeeper 
myDpm: 
    image: dpm-image:latest 
    ports: 
     - 9000:9000 
    links: 
     - kafka 
     - zookeeper 
mySql: 
    image: mysql:latest 
    environment: 
     MYSQL_ROOT_PASSWORD: root 
myMc3: 
    image: mc3-v3:3.0 
    ports: 
     - 9001:9000 
    links: 
     - mySql:3306 
    environment: 
     runMode: dev 
myElastic: 
    image: elasticsearch:2.4.0 
    ports: 
     - 9200:9200 

我想链接mysql与我的play scala项目。我得到一个错误：

[error] - [play.core.server.netty.PlayDefaultUpstreamHandler] - Cannot invoke the action java.sql.SQLTimeoutException: Timeout after 10001ms of waiting for a connection. at com.zaxxer.hikari.pool.BaseHikariPool.getConnection(BaseHikariPool.java:227) ~[com.zaxxer.HikariCP-java6-2.3.7.jar:na] at com.zaxxer.hikari.pool.BaseHikariPool.getConnection(BaseHikariPool.java:182) ~[com.zaxxer.HikariCP-java6-2.3.7.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:93) ~[com.zaxxer.HikariCP-java6-2.3.7.jar:na] at slick.jdbc.hikaricp.HikariCPJdbcDataSource.createConnection(HikariCPJdbcDataSource.scala:12) ~[com.typesafe.slick.slick-hikaricp_2.11-3.1.1.jar:na] at slick.jdbc.JdbcBackend$BaseSession.conn$lzycompute(JdbcBackend.scala:415) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.JdbcBackend$BaseSession.conn(JdbcBackend.scala:414) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.JdbcBackend$SessionDef$class.prepareStatement(JdbcBackend.scala:297) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.JdbcBackend$BaseSession.prepareStatement(JdbcBackend.scala:407) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.StatementInvoker.results(StatementInvoker.scala:33) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.StatementInvoker.iteratorTo(StatementInvoker.scala:22) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.Invoker$class.foreach(Invoker.scala:48) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.StatementInvoker.foreach(StatementInvoker.scala:16) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.Invoker$class.firstOption(Invoker.scala:24) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.StatementInvoker.firstOption(StatementInvoker.scala:16) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.StreamingInvokerAction$HeadOptionAction.run(StreamingInvokerAction.scala:57) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.jdbc.StreamingInvokerAction$HeadOptionAction.run(StreamingInvokerAction.scala:56) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.backend.DatabaseComponent$DatabaseDef$$anon$2.liftedTree1$1(DatabaseComponent.scala:237) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at slick.backend.DatabaseComponent$DatabaseDef$$anon$2.run(DatabaseComponent.scala:237) ~[com.typesafe.slick.slick_2.11-3.1.1.jar:na] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_111] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_111] at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_111] Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

Answer 1

如前所述here泊坞窗链接一定程度上被网络所取代。

Before the Docker network feature, you could use the Docker link feature to allow containers to discover each other. With the introduction of Docker networks, containers can be discovered by its name automatically.

默认情况下，在撰写文件中的所有容器加入一个默认网络（如果没有其他的网络被定义），你应该能够通过使用服务名和正确的端口，如从其他服务访问一个服务： mySql：3306

更多信息可在network docs from docker中找到。

Answer 2

正确链接到MySQL：

myMc3: 
    ... 
    links: 
    - mySql 

（不含3306）