[Pacemaker] Active/passive cluster with Apache and drbd on rhel 5

[Dan Frincu]

Hello all,
I'm currently studying how to set up a 2 node cluster running apache 2.2 
as a reverse proxy using corosync, pacemaker and drbd on RHEL 5.5.
I've downloaded:
- Clusters from scratch PDF (which is perfect... but for fedora 13 which 
includes DRBD in the kernel)
- the yum repo: http://www.clusterlabs.org/rpm/epel-5/clusterlabs.repo

As DRBD is not included in RHEL 5, I've launched the following command:
yum install drbd

It works perfectly... but when installing drbd, the package drbd-xen is 
marked as a dependancy, resulting in the XEN kernel being installed on the 
RHEL 5 box. This is not a big issue, but I would prefer not to install XEN 
on the box.
Is it possible?

Thanks in advance, and excuse my english mistakes,

Pierre
----

Hello Pierre,

I've had the same issue and resorted to rebuilding the RPM's from SRC RPM's. The process can be complex, but I will show the steps I've taken to make it easier.
- first setup mock for building RPM's chrooted (thus you use one system to build for any arch, x86_86, i686, etc.) => http://fedoraproject.org/wiki/Projects/Mock
- install yum-utils, this provides yumdownloader command
- the yum repo is already configured so I'll skip this step
- using "yumdownloader --disablerepo=\* --enablerepo=clusterlabs drbd --source" you get the SRC RPM for drbd. Then it's a simple matter of installing the RPM and editing the .spec file in /usr/src/redhat/SPECS, removing the XEN dependencies, then building the RPM according to the Mock How-To

Hope this helps.

Cheers.

-- 
Dan FRINCU
Internal Support Engineer
CCNA, RHCE

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