Obliterate (DRBD fence handler) - Revision history

Digimer at 03:21, 5 May 2013

2013-05-05T03:21:30Z

← Older revision		Revision as of 03:21, 5 May 2013
Line 3:		Line 3:
	This is the [[Red Hat]] <span class="code">obliterate</span> script used to let [[DRBD]] trigger a [[cman]] [[fenced]] call when a split brain is detected. This was originally found [http://gfs.wikidev.net/DRBD_Cookbook here].		This is the [[Red Hat]] <span class="code">obliterate</span> script used to let [[DRBD]] trigger a [[cman]] [[fenced]] call when a split brain is detected. This was originally found [http://gfs.wikidev.net/DRBD_Cookbook here].

	Download the <span class="code">/sbin/[https://alteeve.~~com~~/files/an-cluster/sbin/obliterate obliterate]</span> script, ~2.1[[KiB]].		Download the <span class="code">/sbin/[https://alteeve.ca/files/an-cluster/sbin/obliterate obliterate]</span> script, ~2.1[[KiB]].

	<source lang="bash">		<source lang="bash">

Digimer at 02:53, 29 March 2011

2011-03-29T02:53:08Z

← Older revision		Revision as of 02:53, 29 March 2011
Line 3:		Line 3:
	This is the [[Red Hat]] <span class="code">obliterate</span> script used to let [[DRBD]] trigger a [[cman]] [[fenced]] call when a split brain is detected. This was originally found [http://gfs.wikidev.net/DRBD_Cookbook here].		This is the [[Red Hat]] <span class="code">obliterate</span> script used to let [[DRBD]] trigger a [[cman]] [[fenced]] call when a split brain is detected. This was originally found [http://gfs.wikidev.net/DRBD_Cookbook here].

	<span class="code">/sbin/[https://alteeve.com/files/an-cluster/sbin/obliterate obliterate]</span> script, ~2.1[[KiB]].		Download the <span class="code">/sbin/[https://alteeve.com/files/an-cluster/sbin/obliterate obliterate]</span> script, ~2.1[[KiB]].

	<source lang="bash">		<source lang="bash">

Digimer at 02:39, 29 March 2011

2011-03-29T02:39:47Z

← Older revision		Revision as of 02:39, 29 March 2011
Line 2:		Line 2:

	This is the [[Red Hat]] <span class="code">obliterate</span> script used to let [[DRBD]] trigger a [[cman]] [[fenced]] call when a split brain is detected. This was originally found [http://gfs.wikidev.net/DRBD_Cookbook here].		This is the [[Red Hat]] <span class="code">obliterate</span> script used to let [[DRBD]] trigger a [[cman]] [[fenced]] call when a split brain is detected. This was originally found [http://gfs.wikidev.net/DRBD_Cookbook here].

			<span class="code">/sbin/[https://alteeve.com/files/an-cluster/sbin/obliterate obliterate]</span> script, ~2.1[[KiB]].

	<source lang="bash">		<source lang="bash">

Digimer: Created page with '{{header}} This is the Red Hat obliterate script used to let DRBD trigger a cman fenced call when a split brain is detected. This was o…'

2011-03-05T04:49:52Z

Created page with '{{header}} This is the Red Hat <span class="code">obliterate</span> script used to let DRBD trigger a cman fenced call when a split brain is detected. This was o…'

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{{header}}

This is the [[Red Hat]] <span class="code">obliterate</span> script used to let [[DRBD]] trigger a [[cman]] [[fenced]] call when a split brain is detected. This was originally found [http://gfs.wikidev.net/DRBD_Cookbook here].

<source lang="bash">
#!/bin/bash
# ###########################################################
# DRBD 0.8.2.1 -> linux-cluster super-simple fencing wrapper
#
# Copyright Red Hat, 2007
#
# Licensed under the GNU General Public License version 2
# which is incorporated herein by reference:
#
# http://www.gnu.org/licenses/gpl-2.0.html
#
# At your option, you may choose to license this software
# under any later version of the GNU General Public License.
#
# This software is distributed in the hopes that it will be
# useful, but without warranty of any kind.
#
# Kills the other node in a 2-node cluster. Only works with
# 2-node clusters (FIXME?)
#
# ###########################################################
#
# Author: Lon Hohberger <lhh[a]redhat.com>
#
# Special thanks to fabioc on freenode
#

PATH="/bin:/sbin:/usr/bin:/usr/sbin"

NODECOUNT=0
LOCAL_ID=$(cman_tool status 2>/dev/null | grep '^Node ID:' | awk '{print $3}')
REMOTE_ID=""
REMOTE=""

if [ -z "$LOCAL_ID" ]; then
echo "Could not determine local node ID!"
exit 1
fi

# Shoot the other guy.
while read nid nodename; do
if [ "$nid" = "0" ]; then
continue
fi

((NODECOUNT++))

if [ "$nid" != "$LOCAL_ID" ]; then
REMOTE_ID=$nid
REMOTE=$nodename
fi
done < <(cman_tool nodes 2>/dev/null | grep -v '^Node' | awk '{print $1,$6}')

if [ $NODECOUNT -ne 2 ]; then
echo "Only works with 2 node clusters"
exit 1
fi

if [ -z "$REMOTE_ID" ] || [ -z "$REMOTE" ]; then
echo "Could not determine remote node"
exit 1
fi

echo "Local node ID: $LOCAL_ID"
echo "Remote node ID: $REMOTE_ID"
echo "Remote node: $REMOTE "

#
# This could be cleaner by calling cman_tool kill -n <node>, but then we have
# to poll/wait for fence status, and I don't feel like writing that right
# now. Note that GFS *will* wait for this to occur, so if you're using GFS
# on DRBD, you still don't get access. ;)
#
fence_node $REMOTE

if [ $? -eq 0 ]; then
#
# Reference:
# http://osdir.com/ml/linux.kernel.drbd.devel/2006-11/msg00005.html
#
# 7 = node got blown away.
#
exit 7
fi

#
# Fencing failed?!
#
exit 1
</source>

{{footer}}