9:42 a.m.
Hello,
could anybody confirm if it's OK (or not OK) to run multiple clustering
Wildfly instances that would share common standalone/ directory? Even if
the instances are supposed to be running the same deployments?
I always thought that the standalone/ directory should be separate for
each Wildfly/EAP instance, but I can't find any resources that would
clearly state that shared standalone/ is a problem.
The problems I think of are:
* instances could override their standalone.xml config,
* instances could override some transactional or cache data?
Thanks :),
Tomas
9:55 a.m.
Hi Tomas,
Running multiple instances of EAP on one host is fairly easy, but does
requires to get all the details right.I made an Ansible demo to showcase
this exact use case
<https://github.com/ansible-middleware/wildfly-cluster-demo>;. You may even
be able to reuse the automation.
In short, in this demo, I keep the standalone.xml in the
standalone/configuration folder, but data, tmp and log are instance
specific and located elsewhere.
On Wed, Feb 16, 2022 at 9:43 AM Tomas Hofman <thofman(a)redhat.com> wrote:
4:11 a.m.
New subject: standalone/ directory shared by multiple Wildfly instances?
The design of the software is to not share the subdirectories under
standalone. This is noted under
https://docs.wildfly.org/26/Getting_Started_Guide.html#wildfly-directory-...
.
It's possible to get away with sharing the configuration dir but I wouldn't
recommend doing so unless you are very clear on your use case, as the
server writes there during boot, and of course if you use a management
agent to modify the config. Note that if you use the deployment-scanner
you are using a management agent to modify the config, as the scanner is
just a built in automated management agent.
Also, sharing standalone/deployments will break things as the scanner
writes there and assumes that any changes there were either made by it or
by a user telling it what to do.
On Wed, Feb 16, 2022 at 2:55 AM Romain Pelisse <belaran(a)redhat.com> wrote:
--
Brian Stansberry
Principal Architect, Red Hat JBoss EAP
He/Him/His
9:50 a.m.
New subject: standalone/ directory shared by multiple Wildfly instances?
In case this was not clear: my Ansible demo exactly follows what Brian
recommends here. It creates all the required directories for each instance
and configures each instance to use those. The configuration folder is
shared, but each instance as it owns standalone.xml (which means that all
instances share the same management users list).
@Tomas Hofman <thofman(a)redhat.com> sorry, I misunderstood your question: I
thought you were asking HOW to have several instances running on one host,
not if it was possible for them to share the same folders. My bad, I could
have tell you already that it was indeed not supported.
On Wed, Mar 2, 2022 at 9:44 AM Tomas Hofman <thofman(a)redhat.com> wrote:
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Tomas Hofman