On 3/29/2010 at 10:24 AM, mike mgbut...@nbnet.nb.ca wrote:
Hi All,
I'm looking for a good document that can take someoen very new to
LinuxHA (me) and clearly explain how stonith is implemented and how to
configure it. Most of what I've found so far is very cryptic and frankly
dose not explain how to configure stonith in a working cluster. For my
example, I have 3 working IP Takeover clusters running httpd. What I
want to do should be simple I would think. If there is a takeover, kill
the other node. I have a command that works very well in the
environment I am using LinuxHA but I can't find any documentation that
helps me understand how stonith is implemented and configured. I need to
understand this first.
Can someone point me to some good documentation on stonith? Where do I
start?
Try http://www.clusterlabs.org/doc/crm_fencing.html
Also various links at http://www.clusterlabs.org/wiki/Documentation
(in particular Clusters from Scratch and Configuration Explained).
Maybe http://ourobengr.com/ha (but that's more about what can go wrong
with STONITH in a two node cluster, than about how to configure STONITH).
Note that whether or not STONITH occurs for a given failure depends on
how you've configured your resources. It'll always trigger if a node
is (apparently) completely dead, or (by default) if a resource stop op
fails. If a resource can't start, or is running then fails, STONITH
won't occur unless you set the on-fail property of that operation to
fence. You should find more detail about this in the Configuration
Explained document.
HTH,
Tim
--
Tim Serong tser...@novell.com
Senior Clustering Engineer, OPS Engineering, Novell Inc.
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