[wildfly-dev] can we get host controllers to push out subsystem extension modules?

[John Mazzitelli]

<TL;DR>
If I define my own subsystem configuration in one of the domain controller's profiles, can the DC/HC push out my subsystem extension module to the managed standalone servers just like it pushes out deployments to them?
</TL;DR>


In WildFly's Domain Operating Mode you can define Server Groups in your Domain Controller configuration [1]. In these Server Groups you say what deployments should be deployed on which servers, like this:

<server-group name="main" profile="default">
    <deployments>
        <deployment name="foo.war" runtime-name="foo.war" />
    </deployments>
</server-group>

The DC and HC will do their thing to ensure those deployments are installed on the managed standalone servers. [3]

Additionally in your Domain Controller configuration, you can define profiles with different subsystems [2] (so presumably some managed standalone servers can have some subsystems, where others in different profiles don't have to have them - or at least could be configured differently). For example:

<profiles>
    <profile name="default">
        <subsystem xmlns="urn:jboss:domain:web:1.0">
            <connector name="http" scheme="http" protocol="HTTP/1.1" socket-binding="http"/>
            [...]
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:fictional-example:1.0">
            <socket-to-use name="unique-to-bigger"/>
        </subsystem>
        [...]
    </profile>
</profiles>

My question is - does the DC and HC manage that "fictional-example" subsystem extension module just like they handle deployments? In other words, will that subsystem's module get pushed out to the managed standalone servers (in the same way the DC/HC ensures the deployments are pushed out to the managed standalone servers?) If so, where do you put the module directory? On the DC, like deployments [3]? If not, how does this "fictional-example" subsystem that is defined in the profile make its way to the managed standalone server?

Thanks,
John Mazz

[1] https://docs.jboss.org/author/display/WFLY10/Operating+modes
[2] https://docs.jboss.org/author/display/WFLY10/Domain+Setup
[3] https://docs.jboss.org/author/display/WFLY8/Application+deployment