On Fri, 2008-11-14 at 15:06 -0800, nate wrote:
Using CentOS 5.1, though with a few hours work I could update to 5.2.. I can install to SAN with a single path no problem but I'd like to be able to use dm-multipath. From the kickstart docs it seems this is supported but there is no information as to what the various options mean
http://www.centos.org/docs/5/html/5.1/Installation_Guide/s1-kickstart2-optio...
-- multipath (optional)
multipath --name= --device= --rule=--
Ah! I just ran through this exact scenario a week ago. Turns out in inspecting the anaconda code I couldn't actually find any support for that directive, it looks to be more of a placeholder, but I'm no python wizard.
What is does support though is auto detecting and creating a simple multipath.conf, good enough configure lvm with during the install.
This setup can be triggered by passing 'mpath' as a kernel parameter during kickstart.
Only other thing I had to do was add a bit of %post scripting to tweak multipath.conf and lvm.conf for our particular drive/controller setup.