[ClusterLabs] Podman active-active bundle

[MAIER Jakob]

Hi,

I am aware of the documentation that you have linked here, and I have managed to setup a bundle running on two nodes. What I am having problems with is running them as master-slave. Would this be handled by the primitive running inside the bundle, since the podman resource-agent does not have the promote/demote actions? If possible, I would like the promotion and demotion only depend on the state of the container, not what is running inside (so no primitive). 

Also, how would you setup networking to have a single virtual ip for all clones in the bundle? I have not found any documentation on how to do something like that.

Concerning the RHEL UBI image, I have created my own base image that has pacemaker-remoted installed, so that should not be a problem. 

Best,
Jakob


-----Original Message-----
From: Ken Gaillot <kgaillot at redhat.com> 
Sent: Mittwoch, 17. Juli 2024 16:09
To: Cluster Labs - All topics related to open-source clustering welcomed <users at clusterlabs.org>
Cc: MAIER Jakob <Jakob.MAIER at frequentis.com>
Subject: Re: [ClusterLabs] Podman active-active bundle

*EXTERNAL source*


Hi,

The upstream bundle documentation is at:

https://clusterlabs.org/pacemaker/doc/2.1/Pacemaker_Explained/html/collective.html#bundles-containerized-resources

There is also a walk-through:

https://projects.clusterlabs.org/w/projects/pacemaker/bundle_walk-through/

Unfortunately, since that was written, the HA packages were taken off the RHEL UBI container image, so you'll have to adjust the instructions for some other distro base image that does have the HA packages. It should be nearly identical though.

On Wed, 2024-07-17 at 11:56 +0000, MAIER Jakob via Users wrote:
> Hi!
>
> I would like to setup a number of podman containers in two nodes such 
> that every container is running on both nodes (active-active). One of 
> the containers should be master while the other is slave, and when 
> there is a failure with the containers healthcheck, there should be a 
> failover. These two master-slave containers should also have a virtual 
> ip address assigned to them, that points to the current master. There 
> is sadly not a lot of documentation on bundles. I have found some 
> documentation from redhat on such “complex bundles”, but unfortunately 
> that is also not very detailed, and I don’t really know how to 
> proceed.
>
> Does anybody know how I could go about setting something like this up?
>
> Kind regards,
> Jakob
>
> _______________________________________________
> Manage your subscription:
> https://lists.clusterlabs.org/mailman/listinfo/users
>
> ClusterLabs home: https://www.clusterlabs.org/
--
Ken Gaillot <kgaillot at redhat.com>