title: Integration testing with Testcontainers + Quarkus + MongoDB
body: <p>Trying out testcontainers for integration testing. I am testing rest api endpoint. Here is the technology stack - 
  quarkus, RESTEasy and mongodb-client</p>
  
  <p>I am able to see MongoDB container is started successfully but getting exception. Exception: "com.mongodb.MongoSocketOpenException: Exception opening socket"</p>
  
  <pre><code>2020-04-26 15:13:18,330 INFO  [org.tes.doc.DockerClientProviderStrategy] (main) Loaded org.testcontainers.dockerclient.UnixSocketClientProviderStrategy from ~/.testcontainers.properties, will try it first
  2020-04-26 15:13:19,109 INFO  [org.tes.doc.UnixSocketClientProviderStrategy] (main) Accessing docker with local Unix socket
  2020-04-26 15:13:19,109 INFO  [org.tes.doc.DockerClientProviderStrategy] (main) Found Docker environment with local Unix socket (unix:///var/run/docker.sock)
  2020-04-26 15:13:19,258 INFO  [org.tes.DockerClientFactory] (main) Docker host IP address is localhost
  2020-04-26 15:13:19,305 INFO  [org.tes.DockerClientFactory] (main) Connected to docker: 
    Server Version: 19.03.8
    API Version: 1.40
    Operating System: Docker Desktop
    Total Memory: 3940 MB
  2020-04-26 15:13:19,524 INFO  [org.tes.uti.RegistryAuthLocator] (main) Credential helper/store (docker-credential-desktop) does not have credentials for quay.io
  2020-04-26 15:13:20,106 INFO  [org.tes.DockerClientFactory] (main) Ryuk started - will monitor and terminate Testcontainers containers on JVM exit
  2020-04-26 15:13:20,107 INFO  [org.tes.DockerClientFactory] (main) Checking the system...
  2020-04-26 15:13:20,107 INFO  [org.tes.DockerClientFactory] (main) ✔︎ Docker server version should be at least 1.6.0
  2020-04-26 15:13:20,230 INFO  [org.tes.DockerClientFactory] (main) ✔︎ Docker environment should have more than 2GB free disk space
  2020-04-26 15:13:20,291 INFO  [ .2]] (main) Creating container for image: mongo:4.2
  2020-04-26 15:13:20,420 INFO  [ .2]] (main) Starting container with ID: d8d142bcdef8e2ebe9c09f171845deffcda503d47aa4893cd44e72d7067f0cdd
  2020-04-26 15:13:20,756 INFO  [ .2]] (main) Container mongo:4.2 is starting: d8d142bcdef8e2ebe9c09f171845deffcda503d47aa4893cd44e72d7067f0cdd
  2020-04-26 15:13:22,035 INFO  [ .2]] (main) Container mongo:4.2 started in PT3.721S
  2020-04-26 15:13:24,390 INFO  [org.mon.dri.cluster] (main) Cluster created with settings {hosts=[127.0.0.1:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
  2020-04-26 15:13:24,453 INFO  [org.mon.dri.cluster] (main) Cluster created with settings {hosts=[127.0.0.1:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
  2020-04-26 15:13:24,453 INFO  [org.mon.dri.cluster] (cluster-ClusterId{value='5ea5dd542fb66c613dc74629', description='null'}-127.0.0.1:27017) Exception in monitor thread while connecting to server 127.0.0.1:27017: com.mongodb.MongoSocketOpenException: Exception opening socket
      at com.mongodb.internal.connection.SocketChannelStream.open(SocketChannelStream.java:63)
      at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:126)
      at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:117)
      at java.lang.Thread.run(Thread.java:748)
  Caused by: java.net.ConnectException: Connection refused
      at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
      at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:714)
      at sun.nio.ch.SocketAdaptor.connect(SocketAdaptor.java:122)
      at com.mongodb.internal.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:64)
      at com.mongodb.internal.connection.SocketChannelStream.initializeSocketChannel(SocketChannelStream.java:72)
      at com.mongodb.internal.connection.SocketChannelStream.open(SocketChannelStream.java:60)
      ... 3 more
  
  </code></pre>
  
  <p>If I use docker run then my test case works properly.</p>
  
  <pre><code>docker run -p 27017:27017 --name mongodb mongo:4.2
  </code></pre>
  
  <p>using testcontainer as mentioned @ <a href="https://www.testcontainers.org/quickstart/junit_5_quickstart/" rel="noreferrer">https://www.testcontainers.org/quickstart/junit_5_quickstart/</a></p>
  
  <pre><code>@Container
      static GenericContainer mongodb = new GenericContainer&lt;&gt;("mongo:4.2").withExposedPorts(27017);
  </code></pre>