Add support for corosync based clusters in clvm

Previous patch was wrong. This one really adds support for all clusters.

Some questions:

- This doesn't actually drop the cman build dependency, although the changelog and bug description say it's going to be deprecated?
- Can the changelog please point out the origin of clvmd.ra? Is that upstream?
- Is this change covered by any blueprint or similar document which gives some background about those changes? (Admittedly I don't know about openais/corosync/cman)

Thanks!

1) Correct, bug report and changelog were wrong.
2) It's not part of the upstream; resource agents are shell scripts for starting/stoping services. Author is Xinwei Hu, with some modifications made by me to make it usable on Ubuntu
3) This change isn't directly covered by a blueprint, but if we are replacing current cluster stack with new one, we should provide features that previous cluster stack provided. And since we don't want quietly make current clvm/cman users cry, clvm should be built with support for both old and new cluster stack (libcman, that is required for cman support, would stay in main, while cman binary would end up in universe if pacemaker related MIRs get accepted). You could use this blueprint as a guideline:

https://blueprints.edge.launchpad.net/ubuntu/+spec/server-lucid-cluster-stack

I've attached new debdiff that answers this questions.

Thierry, can you please comment on this?

It is important for us to have a consistent cluster stack for lucid and this FFe is part of it. This is about adding support for extra shared storage types in clvm so it looks reasonably contained. So +1 from me on this individual issue.

My only question is how far are we currently from shipping a consistent cluster stack in lucid ? If this is the last FFe required and we are just a couple MIRs and some documentation away, then everything is alright. It's difficult to tell where we stand right now though, as the whiteboard on the cluster stack spec doesn't seem up to date.

It would be great if this patch made it's way into the package. I patched the current clvm package (lvm2_2.02.54-1ubuntu4) and corosync/pacemaker support works as expected.

/usr/lib/ocf/resource.d/lvm2/clvmd is gone from the latest clvm package. Also, clvmd is still not built with support for corosync/openais.

Dag, for this features, please take a look at:

https://edge.launchpad.net/~ubuntu-ha/+archive/lucid-cluster

Dag, for this features, please take a look at:

https://edge.launchpad.net/~ubuntu-ha/+archive/lucid-cluster

This features will soon be added to packages in this repository.

In Pacemaker you tend to run daemons like clvm as a cluster resource, not requiring the init script.

Even so... the clvmd init script also contains RHCS specific bits (checks for an existing cluster.conf file and that the cluster infrastructure is running), so fails to start on it's own, this might be an opportunity to remove these too?

Small patch attached for the init script to remove those checks.

Ante, are we any closer to having clvm without cman. In looking at the link above it still appears you need the cman packages for clvm to operate. If I am incorrect on this can you put together a quick howto as to how you got it working. It would be greatly appreciated as if I need pacemaker for other things there is no need to add another cluster stack. Pacemaker should be the only stack used

You help in this is very appreciated.

On 06.05.2010 01:57, Mark Burgo wrote:

> Ante, are we any closer to having clvm without cman. In looking at
> the link above it still appears you need the cman packages for clvm to
> operate.

Eh? clvm depends on libcman library only. Since it's compiled with
support for both corosync and cman, you need only one of those.

Thank you, I now have this operation on a set of test VM's. Will this be being moved to the general repositories for lucid or are they not going to update the system now that it has been released.

I would hate to put this into production and then find that they release a new version of one of the required packages and have everything break on us.

Thank You again

is this still an issue for maverick? If so, your target is set to beta ;).

Dropping the obsolete milestone and unsubscribing the release team. This needs to be addresses in Natty.

Attaching new debdiff.

This bug was fixed in the package lvm2 - 2.02.66-4ubuntu2

---------------
lvm2 (2.02.66-4ubuntu2) natty; urgency=low

  * Add support for corosync based clusters. (LP: #525287)
    - Build clvm with support for corosync, openais and cman
    - Add and install clvmd resource agent, written by Xinwei Hu,
      slightly modified by Ante Karamatic to work on Ubuntu
 -- Andres Rodriguez <email address hidden> Fri, 14 Jan 2011 15:39:03 -0600

I install corosync , pacemaker, clvm in ubuntu 12.04, and I dont can start clvm with corosync, only with openais.
clvmd -T20 -d2 -Iopenais, start without problems
clvmd -T20 -d2 -Icorosync, not start .
these is errors:

clvmd could not connect to cluster manager
Consult syslog for more information

syslog:
CLVMD started
clvmd[3099]: Unable to create lockspace for CLVM: Success
clvmd[3099]: Can't initialise cluster interface

strace:
connect(3, {sa_family=AF_FILE, path="/var/run/lvm/clvmd.sock"}, 110) = -1 ECONNREFUSED (Connection refused)

Please, any help