Hi all. I was hoping to get some help with my configuration. I'm kinda stuck at the moment.
I've made some changes to the Raid1 RA to implement a ms style configuration (you can see a diff here http://pastebin.com/Q2nbF6Rg against the RA in the github repo) I've modeled my ms implementation heavily on the SCST RA from the ESOS project (thanks Marc!). Here is my full pacemaker config: http://pastebin.com/jw6WTpZz I'm running on CentOS 6.5 using Pacemaker, and CMAN available from the distro. I'll explain a little bit about what I'm doing then tell you folks where I think I need a bit of assistance or a push in the right direction The Raid1 RA changes I made are because I want to assemble the same RAID1 members on two different hosts. The slave should assemble it in readonly mode. Using the SCST RA, I can offer two paths to the same LUN from two distinct systems, one standby, one active. In order to keep things good and consistent, the master of the MD resource also needs to be master of the SCST resource (i'm using the example here http://clusterlabs.org/doc/en- US/Pacemaker/1.1/html/Pacemaker_Explained/s-resource-sets- colocation.html). So if you can't already tell, this is YAA to create a highly available open storage system :) My understanding is that in order for N to start, N+1 must already be running. So my configuration (to me) reads that the ms_md0 master resource must be started and running before the ms_scst1 resource will be started (as master) and these services will be force on the same node. Please correct me if my understanding is incorrect. When both nodes are up and running, the master roles are not split so I *think* my configuration is being honored, which leads me to my next issue. In my modified RA, I'm not sure I understand how to promote/demote properly. For example, when I put a node on standby, the remaining node doesn't get promoted. I'm not sure why, so I'm asking the experts. I'd really appreciate any feedback, advice, etc you folks can give. Thanks, Errol Neal _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
