[keycloak-dev] Allow adapter subsystem to just inject dependencies

Marek Posolda mposolda at redhat.com
Fri Sep 30 04:35:13 EDT 2016

On 30/09/16 08:55, Stian Thorgersen wrote:
> Wouldn't it actually be better to have the auth-server-url in 
> standalone.xml than in the JAAS login module configuration?
Hawtio relies on JAAS and I can't see any nice way how to pass the stuff 
from our subsystem to the JAAS login module. Also I suppose we don't 
want to introduce any keycloak dependencies in hawtio as that would mean 
other complications...

Our adapter subsystem puts the stuff into the JSON string, which is 
saved as servletContext attribute. So what can work is, that hawtio can 
read it from the servletContext and save it to some threadLocal. Then on 
hawtio side, there will be login module, which will read the JSON from 
threadLocal and put it to JAAS sharedState. The Keycloak login module, 
which will be next in the JAAS chain, can then try to see if there is 
stuff in sharedState and if yes, then use it instead of the 
KeycloakDeployment provided by it's JAAS config. Or another possibility 
that class holding threadLocal will be in Keycloak codebase and hawtio 
will use reflection to put the JSON into it (as we don't want keycloak 
dependencies in hawtio directly).

Both approaches looks to me complicated and introducing dependencies on 
keycloak subsystem implementation details into hawtio codebase (reading 
the servletContext attribute etc). Also it will be useful just with 
hawtio on EAP, but not for Hawtio on Fuse. And Fuse seems to be much 
more important.

> On 30 September 2016 at 08:34, Marek Posolda <mposolda at redhat.com 
> <mailto:mposolda at redhat.com>> wrote:
>     On 29/09/16 10:09, Stian Thorgersen wrote:
>>     Oki, so sounds like what you proposed is the way to go. I'm not
>>     to keen on option 2 or 3 as they seem a bit artificial. Why do
>>     they not need auth-server-url though?
>     Ok, I've created https://issues.jboss.org/browse/KEYCLOAK-3634
>     <https://issues.jboss.org/browse/KEYCLOAK-3634> . The
>     auth-server-url is needed, but this is provided by the JAAS login
>     module configuration. Hawtio itself just relies on the JAAS. It
>     doesn't have servlet security or any security-constraints in
>     web.xml, so doesn't rely on classic servlet adapter.
>     Marek
>>     On 29 September 2016 at 08:18, Marek Posolda <mposolda at redhat.com
>>     <mailto:mposolda at redhat.com>> wrote:
>>         On 28/09/16 10:58, Stian Thorgersen wrote:
>>>         Not sure even using "<secure-deployment...>" makes sense at
>>>         all in this case.  If there's keycloak.json the subsystem
>>>         still injects the dependencies, but doesn't do any
>>>         configuration. Why can't it just rely on that?
>>         Without "secure-deployment", you also need the KEYCLOAK in
>>         login-config in web.xml  in addition to keycloak.json.
>>         Anyway, regarding usability, I suspect it's not an option to
>>         require people to crack inside hawtio.war and change the
>>         things in the WAR directly? Otherwise they can just add
>>         jboss-deployment-structure.xml into the hawtio.war and I
>>         don't need to care about subsystem at all.
>>         Marek
>>>         On 26 September 2016 at 16:39, Marek Posolda
>>>         <mposolda at redhat.com <mailto:mposolda at redhat.com>> wrote:
>>>             I've did some testing with hawtio on EAP 7. It works
>>>             fine, however there
>>>             is one thing in our subsystem, which may improve
>>>             integration a bit.
>>>             Hawtio doesn't use servlet security (
>>>             security-constraints in web.xml )
>>>             but they rely on JAAS, which is needed for JMX calls to
>>>             be performed on
>>>             behalf of JAAS Subject. Hawtio WAR needs to have access to
>>>             keycloak-adapter classes (as it needs login modules for
>>>             JAAS), however
>>>             it doesn't need subsystem to configure adapter. This is
>>>             all handled by
>>>             JAAS login module.
>>>             In other words, it will be nice if subsystem can just inject
>>>             dependencies ( KeycloakDependencyProcessor ), but ignore
>>>             adding
>>>             subsystem configuration (
>>>             KeycloakAdapterConfigDeploymentProcessor ).
>>>             The workaround I used was to add secure-deployment
>>>             section to
>>>             standalone.xml with some dummy values, which are
>>>             mandatory for
>>>             subsystem. It works, but it's really not too pretty IMO.
>>>             Something like:
>>>              <secure-deployment name="hawtio.war">
>>>              <resource>does-not-matter</resource>
>>>             <auth-server-url>does-not-matter</auth-server-url>
>>>              </secure-deployment>
>>>             What will be nice is to have some of those possibilities:
>>>             1) Have subsystem to use some default values like
>>>             "undefined" instead of
>>>             null . This is more a workaround as subsystem will still
>>>             process the
>>>             KeycloakAdapterConfigDeploymentProcessor. However it's
>>>             less work and it
>>>             will improve usability, so this will work just fine:
>>>             <secure-deployment name="hawtio.war" />
>>>             2) Tell the subsystem to ignore
>>>             KeycloakAdapterConfigDeploymentProcessor. Looks like
>>>             more work, but
>>>             seems to be more proper solution than (1). I can think of:
>>>             2.a) some flag like:
>>>             <secure-deployment name="hawtio.war"
>>>             ignore-deployment-config="true" />
>>>             2.b) Use different element like "deployment" instead of
>>>             "secure-deployment" . The "deployment" will inject
>>>             dependencies, but
>>>             won't handle adapter configuration. So something like
>>>             this will work:
>>>             <deployment name="hawtio.war" />
>>>             WDYT?
>>>             Marek
>>>             _______________________________________________
>>>             keycloak-dev mailing list
>>>             keycloak-dev at lists.jboss.org
>>>             <mailto:keycloak-dev at lists.jboss.org>
>>>             https://lists.jboss.org/mailman/listinfo/keycloak-dev
>>>             <https://lists.jboss.org/mailman/listinfo/keycloak-dev>

More information about the keycloak-dev mailing list