If you want a Pacemaker cluster to move resources on changes on the network connectivity of an individual node, there are two major steps involved:

• Let Pacemaker monitor connectivity;
• Configure constraints to react on connectivity changes.

Prerequisites

Be sure to run at least Pacemaker 1.0.11 or 1.1 …

Setting up GFS2 in Pacemaker requires configuring the Pacemaker DLM, the Pacemaker GFS control daemon, and a GFS2 filesystem itself.

Prerequisites

GFS2 with Pacemaker integration is supported on Debian (squeeze-backports and up) and Ubuntu (10.04 LTS and up). You'll need the dlm-pcmk, gfs2-tools, and gfs-pcmk packages.

Fencing is imperative …

Ever wonder what meta interleave really means in a Pacemaker clone definition? We'll explain.

The interleave meta attribute is only valid on Pacemaker clone definitions – and their extended version of sorts, master/slave sets. It's not available on primitives and groups. Clones are often used in configurations involving cluster filesystems …

Setting up OCFS2 in Pacemaker requires configuring the Pacemaker DLM, the O2CB lock manager for OCFS2, and an OCFS2 filesystem itself.

Prerequisites

• OCFS2 with Pacemaker integration is supported on Debian (squeeze-backports and up) and Ubuntu (10.04 LTS and up). You'll need the dlm-pcmk, ocfs2-tools, ocfs2-tools-pacemaker and openais packages.

• Fencing …