Eureka overlooks implementation of UniqueIdentifier to get instance ID

[bhe...@shaklee.com]

Hi,

Been trying to register multiple instances of an application all deployed on the same host. However, Eureka is defaulting to using the hostname as the instance ID, ignoring my implementation of the UniqueIdentifier to generate my own instance id. Hence, overriding previous instance registrations. So, only one instance is registered per host.

The discovery client is initialized like this 

DiscoveryManager.getInstance().initComponent(

    new MyDataCenterInstanceConfig("eureka.", new MyDataCenterInfo()),

    new DefaultEurekaClientConfig()

);

Is there something I'm missing?

[dl...@netflix.com]

Hi,

Can you share the code for your custom MyDataCenterInfo? Also, are you running eureka with spring cloud or with your own custom deployments?

Thanks,

David

[bhe...@shaklee.com]

My own custom deployments. Using the play framework. See below for snippet.

public class MyDataCenterInfo implements DataCenterInfo, UniqueIdentifier {

    private Name name = Name.MyOwn;

    @Override

    public Name getName() {

        return name;

    }

    @Override

    public String getId() {

        Configuration config = Play.application().configuration();

        return config.getInt("application.name") + "-" + config.getString("application.name");

    }

}

Thanks.

Barry

[dl...@netflix.com]

Hmm that is strange. In the eureka source code (https://github.com/Netflix/eureka/blob/master/eureka-client/src/main/java/com/netflix/appinfo/InstanceInfo.java#L709) InstanceInfo.getId() should return the appropriate id if you implement UniqueIdentifier. This change should be available in eureka-client from release 1.1.127 onwards as part of this commit (https://github.com/Netflix/eureka/commit/3d2a2e555f58f9eb8b67fcc41e0dc3c61358c05a). Are you able to use a debugger to see if perhaps the InstanceInfos are not created with the appropriate dataCenters?