Using Vertx Embedded inside of Docker Eventbus Problems

[Kevin Daly]

I am trying to use Vertx inside of a Docker compose application and I am finding the EventBus is not working at all..

Enter code here...
final VertxOptions options = new VertxOptions().setClusterManager(clusterManager);

if (Switches.isInContainer) {
    logger.info("This node is running in a container with hostname ->"+info.getHostName()+" on port ->"+CONTAINER_PORT);
    options.setClusterPublicHost(info.getHostName());
    options.setClusterPublicPort(CONTAINER_PORT);
}

The cluster Manager is using Atomix and it is finding Atomix properly and working properly.

Is there any way to diagnose what is happening?

[Paulo Lopes]

EB does work fine under docker compose (at least HZ does work out of the box without any custom config). Maybe the issue is related to atomix?

[Tim Dörnemann]

Hi Kevin,

I had the same issue when I tried to distribute my verticles to two containers. It turned out that the event bus did not bind to the machine's _public_ interface.

My solution was to run the container with "-h vertx" and then in vertx code resolve the hostname "vertx":

if(clusterHostname != null && !clusterHostname.isEmpty())
   clusterHostname = InetAddress.getByName(clusterHostname).getHostAddress();
else
   clusterHostname = InetAddress.getLocalHost().getHostAddress();

opts.setClusterManager(mgr);
opts.setClusterPort(clusterPort);
opts.setClusterHost(clusterHostname);

(clusterHostname is read from a config file and equals to "vertx")

Hope that helps.

Best, Tim

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[Kevin Daly]

No luck, I've run it through the debugger and seems to be binding itself to the right port..

I don't see any logs for failed messages or anything..