[keycloak-dev] Facing Issue with Resource Server in Clustered Environment

[Bappaditya Gorai (bgorai)]

Please find my response inline for your queries.

Thanks
Bappaditya Gorai

From: Marek Posolda [mailto:mposolda at redhat.com]
Sent: Wednesday, February 04, 2015 8:06 PM
To: Bappaditya Gorai (bgorai); Stian Thorgersen
Cc: keycloak-dev at lists.jboss.org
Subject: Re: [keycloak-dev] Facing Issue with Resource Server in Clustered Environment

Hi,

I am not sure about the details of your environment. You mentioned that you're not interested in clustering of keycloak server.

So am I understand correctly that you have just 1 node as keycloak server and 2 nodes with your application deployed?
[[Bappaditya]]  Yes, only one instance of keycloak Server (Running in standalone mode).  My Application is deployed in 2 nodes (cluster) and running in domain mode.

Are you using "distributable" tag in web.xml of your app on both nodes to ensure session replication?
[[Bappaditya]] Yes, Application is using  "distributable" tag in web.xml.

Are you using loadbalancer?
[[Bappaditya]]  We are using mod_cluster & httpd. Sticky sessions disabled.


Marek

On 4.2.2015 13:37, Bappaditya Gorai (bgorai) wrote:
Thanks for the detailed description. Still, It seems in case of Clustered Resource environment (distributable without Sticky sessions) we are relying on session replication to happen immediately between CODE_TO_TOKEN and Resource Hit(302), which may or may not happen. We are now facing the same issue where After CODE_TO_TOKEN client is redirected to Login URL again.

Are we addressing this scenario with 1.1.0 Final ?


Thanks
Bappaditya Gorai

-----Original Message-----
From: Marek Posolda [mailto:mposolda at redhat.com]
Sent: Monday, February 02, 2015 2:00 PM
To: Bappaditya Gorai (bgorai); Stian Thorgersen
Cc: keycloak-dev at lists.jboss.org<mailto:keycloak-dev at lists.jboss.org>
Subject: Re: [keycloak-dev] Facing Issue with Resource Server in Clustered Environment

Hi,

it's not stateless by default. Data about keycloak authenticated principal are saved in HTTP session by default and can be replicated across cluster nodes (replication works as long as your application is marked as "distributable" in web.xml).

However we support stateless adapter, which won't save anything in HTTP Session and won't create HTTP session and JSESSIONID cookie at all (unless you're calling httpRequest.getSession() in your own application). Instead all the data are saved in cookie.

Some more info in docs:
http://docs.jboss.org/keycloak/docs/1.1.0.Final/userguide/html/applicationClustering.html#stateless-token-store<http://docs.jboss.org/keycloak/docs/1.1.0.Final/userguide/html/applicationClustering.html>

Marek

On 30.1.2015 11:26, Bappaditya Gorai (bgorai) wrote:
> Thanks for clarifying.  So, I think adapter has become stateless in 1.1.0.Final. Is my understanding correct?
>
>
> -----Original Message-----
> From: Stian Thorgersen [mailto:stian at redhat.com]
> Sent: Friday, January 30, 2015 1:18 PM
> To: Bappaditya Gorai (bgorai)
> Cc: keycloak-dev at lists.jboss.org<mailto:keycloak-dev at lists.jboss.org>
> Subject: Re: [keycloak-dev] Facing Issue with Resource Server in
> Clustered Environment
>
>
>
> ----- Original Message -----
>> From: "Bappaditya Gorai (bgorai)" <bgorai at cisco.com<mailto:bgorai at cisco.com>>
>> To: "Stian Thorgersen" <stian at redhat.com<mailto:stian at redhat.com>>
>> Cc: keycloak-dev at lists.jboss.org<mailto:keycloak-dev at lists.jboss.org>
>> Sent: Friday, 30 January, 2015 8:38:49 AM
>> Subject: RE: [keycloak-dev] Facing Issue with Resource Server in Clustered   Environment
>>
>> We are not talking about clustering for Keycloak server. The setup is
>> for Resource Server (Keycloak Adapter)  in clustered environment.
> Same answer
>
>> Thanks
>> Bappaditya Gorai
>>
>> -----Original Message-----
>> From: Stian Thorgersen [mailto:stian at redhat.com]
>> Sent: Friday, January 30, 2015 12:57 PM
>> To: Bappaditya Gorai (bgorai)
>> Cc: keycloak-dev at lists.jboss.org<mailto:keycloak-dev at lists.jboss.org>
>> Subject: Re: [keycloak-dev] Facing Issue with Resource Server in
>> Clustered Environment
>>
>> 1.0.4.Final had very limited support for clustering, please upgrade
>> to 1.1.0.Final and refer to chapter 24 and 25 in the documentation
>> (http://docs.jboss.org/keycloak/docs/1.1.0.Final/userguide/html/clustering.html).
>>
>> ----- Original Message -----
>>> From: "Bappaditya Gorai (bgorai)" <bgorai at cisco.com<mailto:bgorai at cisco.com>>
>>> To: keycloak-dev at lists.jboss.org<mailto:keycloak-dev at lists.jboss.org>
>>> Sent: Friday, 30 January, 2015 8:22:26 AM
>>> Subject: [keycloak-dev] Facing Issue with Resource Server in Clustered
>>>      Environment
>>>
>>>
>>>
>>> Hi Team,
>>>
>>> Please find the details on setup and observation below. Please
>>> provide your suggestion on how to overcome this issue. We are using
>>> Keycloak 1.0.4.Final (Adapter & Server).
>>>
>>>
>>>
>>>
>>>
>>> Setup:
>>>
>>> 1. We have brought up Jboss cluster ( Using mod_cluster, httpd )
>>> with
>>> 2 nodes in domain mode and enabled session replication between these nodes.
>>>
>>> 2. Our Recourse server is deployed in this clustered environment
>>> with distributable and Sticky session Off.
>>>
>>>
>>>
>>> Behavior observed :
>>>
>>> During the Authorization/Authentication process ,when Initial
>>> call(Resource
>>> Access) lands on master and next redirection (post Code To token)
>>> falls on slave Adapter is treating it as a new session and
>>> redirecting to login URL again. So we ended up with circular redirection error.
>>> After further investigation seems like session replication delay is
>>> causing adapter to behave this way. As the redirection call happens
>>> very quickly and this results in circular redirection error.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> NOTE: Sticky Session in mod_cluster environment solves the issue but
>>> it does not provide true load balancing. Therefore we are not
>>> considering Stick session option.
>>>
>>>
>>>
>>>
>>>
>>> Thanks
>>>
>>> Bappaditya Gorai
>>>
>>> _______________________________________________
>>> 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
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