Posted on Mon 19 March 2012 in hints-and-kinks • Tagged with Pacemaker • 1 min read
It’s not uncommon in Pacemaker clusters to run specific cron jobs only
on a node that currently runs a particular resource. The
ocf:heartbeat:symlink resource agent can be exceptionally helpful in
this situation. Here’s how to use it.
Suppose you’ve got a cron job for Postfix …
Posted on Mon 19 March 2012 in presentations • Tagged with DRBD, Flashcache, Pacemaker, Performance • 1 min read
At linux.conf.au 2012, Florian I this presentation on the integration of DRBD, Flashcache and Pacemaker in the High Availability and Distributed Storage miniconf.
In this 30-minute presentation, I explore the benefits of Flashcache for replicated storage. Flashcache, originally developed at Facebook, is a general purpose, block level cache …
Posted on Mon 19 March 2012 in presentations • Tagged with DRBD, KVM, libvirt, Pacemaker • 1 min read
Tim Serong and I explore the capabilities of KVM, iSCSI, DRBD and Pacemaker to create a fully open-source enterprise cloud.
Shot at linux.conf.au 2011 in Brisbane, this is me babbling, and Tim live-cartooning to the delight of the audience.
This article originally appeared on the hastexo …
Posted on Thu 15 March 2012 in hints-and-kinks • Tagged with Corosync • 2 min read
Occasionally, you may see errors similar to this in your system logs:
corosync [TOTEM ] Retransmit List: e4 e5 e7 e8 ea eb ed ee
Here’s what causes them, and what you can do to fix the issue.
Corosync, more specifically its Totem protocol implementation, defines a maximum number of …
Posted on Tue 13 March 2012 in presentations • Tagged with Conference, Pacemaker • 1 min read