2:42 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
2:55 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:
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
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9:11 p.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:
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:
> 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
> _______________________________________________
> wildfly-dev mailing list -- wildfly-dev(a)lists.jboss.org
> To unsubscribe send an email to wildfly-dev-leave(a)lists.jboss.org
> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
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--
Brian Stansberry
Principal Architect, Red Hat JBoss EAP
He/Him/His
2:44 a.m.
New subject: standalone/ directory shared by multiple Wildfly instances?
Thanks Brian,
this is the statement I wanted to get :).
Tomas
On 3/2/22 04:11, Brian Stansberry wrote:
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-...
<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
<mailto:belaran@redhat.com>> wrote:
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
<mailto:thofman@redhat.com>> wrote:
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
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<mailto:wildfly-dev@lists.jboss.org>
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wildfly-dev-leave(a)lists.jboss.org
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--
Brian Stansberry
Principal Architect, Red Hat JBoss EAP
He/Him/His
2:50 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:
Thanks Brian,
this is the statement I wanted to get :).
Tomas
On 3/2/22 04:11, Brian Stansberry wrote:
> 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-...
> <
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
> <mailto:belaran@redhat.com>> wrote:
>
> 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
> <mailto:thofman@redhat.com>> wrote:
>
> 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
> _______________________________________________
> wildfly-dev mailing list -- wildfly-dev(a)lists.jboss.org
> <mailto:wildfly-dev@lists.jboss.org>
> To unsubscribe send an email to
> wildfly-dev-leave(a)lists.jboss.org
> <mailto:wildfly-dev-leave@lists.jboss.org>
> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
>
> _______________________________________________
> wildfly-dev mailing list -- wildfly-dev(a)lists.jboss.org
> <mailto:wildfly-dev@lists.jboss.org>
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> <mailto:wildfly-dev-leave@lists.jboss.org>
> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
>
>
>
> --
> Brian Stansberry
> Principal Architect, Red Hat JBoss EAP
> He/Him/His
3 a.m.
New subject: standalone/ directory shared by multiple Wildfly instances?
No problem, I should have made that clearer. Thanks for help guys!
Tomas
On 3/2/22 09:50, Romain Pelisse wrote:
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 <mailto:thofman@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
<mailto:thofman@redhat.com>> wrote:
Thanks Brian,
this is the statement I wanted to get :).
Tomas
On 3/2/22 04:11, Brian Stansberry wrote:
> 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-...
<https://docs.wildfly.org/26/Getting_Started_Guide.html#wildfly-directory-...
>
<https://docs.wildfly.org/26/Getting_Started_Guide.html#wildfly-directory-...
<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 <mailto:belaran@redhat.com>
> <mailto:belaran@redhat.com <mailto:belaran@redhat.com>>> wrote:
>
> 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
<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 <mailto:thofman@redhat.com>
> <mailto:thofman@redhat.com <mailto:thofman@redhat.com>>>
wrote:
>
> 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
> _______________________________________________
> wildfly-dev mailing list -- wildfly-dev(a)lists.jboss.org
<mailto:wildfly-dev@lists.jboss.org>
> <mailto:wildfly-dev@lists.jboss.org
<mailto:wildfly-dev@lists.jboss.org>>
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> <mailto:wildfly-dev-leave@lists.jboss.org
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>
> _______________________________________________
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>
>
>
> --
> Brian Stansberry
> Principal Architect, Red Hat JBoss EAP
> He/Him/His
824
days inactive
838
days old
5 comments
3 participants
participants (3)
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Brian Stansberry -
Romain Pelisse -
Tomas Hofman