在同一个 docker compose 中从 docker 容器拒绝连接

问题描述

我有一个 akka http 应用程序和一个 keycloak docker container 我使用 sbt native docker plugin 创建了我的应用程序的映像，然后我编写了一个 docker compose 文件，但我的应用程序容器没有发现 keycloak 容器

这是我的 build.sbt 文件

enablePlugins(DockerPlugin)
enablePlugins(JavaAppPackaging)
dockerExposedPorts := Seq(8083)

然后我为我的项目创建了一个 docker 镜像

>docker:publishLocal

然后我创建了一个 docker-compose 文件

版本：'3.3'

services:
  keycloak:
   image: jboss/keycloak
   container_name: docker-keycloak-container
   ports:
     - "8080:8080"
   environment:
     - KEYCLOAK_USER=admin
     - KEYCLOAK_PASSWORD=admin  

  akkahttpservice:
   image: myproject-auth:0.0.1
   container_name: docker-myproject-auth-container
   ports:
     - "8083:8083"
   depends_on:
      - keycloak

docker ps 显示

CONTAINER ID        IMAGE                  COMMAND                  CREATED             STATUS              PORTS                              NAMES
181522f78d22        myproject-auth:0.0.1   "/opt/docker/bin/int…"   45 seconds ago      Up 40 seconds       0.0.0.0:8083->8083/tcp             docker-myproject-auth-container
d92d9c4f0a19        jboss/keycloak         "/opt/jboss/tools/do…"   5 days ago          Up 46 seconds       0.0.0.0:8080->8080/tcp,8443/tcp   docker-keycloak-container

但是当我点击与keycloak对话的应用程序路线时，我得到了

14:13:32.020 [scala-execution-context-global-45] ERROR com.ifkaar.lufz.authentication.actors.worker.TokenManagerActor - Actor TokenManager: exception in fetching token
docker-myproject-auth-container | akka.stream.StreamTcpException: Tcp command [Connect(0.0.0.0:8080,None,List(),Some(10 seconds),true)] Failed because of java.net.ConnectException: Connection refused
docker-myproject-auth-container | Caused by: java.net.ConnectException: Connection refused
docker-myproject-auth-container |   at sun.nio.ch.socketChannelImpl.checkConnect(Native Method)
docker-myproject-auth-container |   at sun.nio.ch.socketChannelImpl.finishConnect(SocketChannelImpl.java:714)
docker-myproject-auth-container |   at akka.io.TcpOutgoingConnection$$anonfun$connecting$1.$anonfun$applyOrElse$4(TcpOutgoingConnection.scala:111)
docker-myproject-auth-container |   at akka.io.TcpOutgoingConnection.akka$io$TcpOutgoingConnection$$reportConnectFailure(TcpOutgoingConnection.scala:53)
docker-myproject-auth-container |   at akka.io.TcpOutgoingConnection$$anonfun$connecting$1.applyOrElse(TcpOutgoingConnection.scala:111)
docker-myproject-auth-container |   at akka.actor.Actor.aroundReceive(Actor.scala:537)
docker-myproject-auth-container |   at akka.actor.Actor.aroundReceive$(Actor.scala:535)
docker-myproject-auth-container |   at akka.io.TcpConnection.aroundReceive(TcpConnection.scala:33)
docker-myproject-auth-container |   at akka.actor.ActorCell.receiveMessage(ActorCell.scala:577)
docker-myproject-auth-container |   at akka.actor.ActorCell.invoke(ActorCell.scala:547)
docker-myproject-auth-container |   at akka.dispatch.MailBox.processMailBox(MailBox.scala:270)
docker-myproject-auth-container |   at akka.dispatch.MailBox.run(MailBox.scala:231)
docker-myproject-auth-container |   at akka.dispatch.MailBox.exec(MailBox.scala:243)
docker-myproject-auth-container |   at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
docker-myproject-auth-container |   at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
docker-myproject-auth-container |   at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
docker-myproject-auth-container |   at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

但是当我从 sbt 运行我的应用程序并使用 docker keycloak 容器时一切正常，为什么会这样？

我也在 http://0.0.0.0:8083

上运行我的 akka http 项目

请指导我

解决方法

您需要通过环境变量将 keycloak 的地址注入到您的服务中。为此，您可以使用服务名称作为 keycloak 地址 (Compose docs)

services:
  keycloak:
   image: jboss/keycloak
   container_name: docker-keycloak-container
   ports:
     - "8080:8080"
   environment:
     - KEYCLOAK_USER=admin
     - KEYCLOAK_PASSWORD=admin  

  akkahttpservice:
   image: myproject-auth:0.0.1
   container_name: docker-myproject-auth-container
   environment:
     - KEYCLOAK_URL: "http://keycloak:8080"
   ports:
     - "8083:8083"
   depends_on:
      - keycloak

akka-http docker docker docker-compose sbt sbt