Re: [mod_cluster-dev] [Fwd: mod-cluster and domains]
Paul Ferraro wrote:
> *#1 Does mod-cluster support domains with sticky sessions ?_
>
> I just need a quick confirmation on this. For config details, I'll go
> and re-read the archives.
Yes.
OK, thx
> *#2 Disabling an entire domain*
>
> I want to disable not just 1 node in a domain, but all nodes in a given
> domain. Is this possible ? If so, I'd assume this is done through
> mod-cluster-manager ?
This is not yet possible
OK
> *#2a: How do I know when all sessions of all nodes of a given
domain
> have expired ?*
>
> This is necessary to know when I can shut down all nodes of a given
> domain
mod_manager reports the number of active sessions per node. This logic
isn't completely accurate - as it defines an "active" session as one
that was accessed within the last 5 minutes.
To get accurate active session counts from each server in a domain,
you'll need to verify the activeSessions attribute of the individual
jboss.web:type=Manager,* mbeans via jmx-console, or similar.
OK. I guess, for the demo I can write a small script which accesses all
nodes in the domain and spits out this information.
The plan is to implement stop(...) management methods (i.e. for
graceful
shutdown) that disables the node, waits for all sessions to drain, then
stops the node.
We'll allow this per domain as well.
Great !
> *#4 Enabling an entire domain*
>
> When all nodes in a domain have been started as disabled (step #3), I'd
> like to tell the httpds to enable all (or a selected set of) webapps in
> a given domain, in all nodes of that domain. Is this possible ?
In general, we have not yet implemented per-domain management
functionality.
I'll create JIRAs for these.
Let's discuss first which features we want to place into the
mod-cluster-manager, and which ones into JBoss AS (or JOPR). I think
Brian might have valuable feedback once he returns from his meeting with
the JON/JOPR folks in Westford...
But, as I mentioned in my reply to Jean-Frederic's email this morning, I
think some features would be really useful to have in mod-cluster-manager.
Cheers,
--
Bela Ban
Lead JGroups / Clustering Team
JBoss