Digimer at 03:22, 5 May 2013

2013-05-05T03:22:26Z

← Older revision		Revision as of 03:22, 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://people.redhat.com/lhh/obliterate-peer.sh 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://people.redhat.com/lhh/obliterate-peer.sh here].

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

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

Digimer: moved Obliterate-peer.sh to Obliterate-peer.sh (DRBD fence handler)

2011-05-04T18:43:21Z

moved Obliterate-peer.sh to Obliterate-peer.sh (DRBD fence handler)

← Older revision	Revision as of 18:43, 4 May 2011
(No difference)

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..."

2011-05-04T18:42:55Z

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..."

Páàjì titun

{{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 originally found [http://people.redhat.com/lhh/obliterate-peer.sh here].

Download the /sbin/[https://alteeve.com/files/an-cluster/sbin/obliterate-peer.sh obliterate-peer.sh] script, ~2.1[[KiB]].

<source lang="bash">
#!/bin/bash
# ###########################################################
# DRBD 0.8.2.1 -> linux-cluster super-simple fencing wrapper
#
# 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
#
# http://sources.redhat.com/cluster/wiki/DRBD_Cookbook
# http://people.redhat.com/lhh/obliterate
#
# Nethesis - http://www.nethesis.it
# Federico Simoncelli <federico.simoncelli@nethesis.it>
# $Id: obliterate-peer.sh 709 2009-06-10 10:59:21Z federico $

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

LOCAL_ID=$(cman_tool status | awk '/Node ID:/{print $3}')

if [ -z "$LOCAL_ID" ]; then
logger -t $0 "Could not determine local node ID!"
exit 1
fi

DISK_UPTODATE=$(drbdadm get-gi $DRBD_RESOURCE | awk -F: '{print $6}')

if [ "$DISK_UPTODATE" != 1 ]; then
logger -t $0 "Local node is not UpToDate!"
exit 6
fi

NODECOUNT=0
while read NODE_ID NODE_NAME; do
[ $NODE_ID = 0 ] && continue
[ $NODE_ID != $LOCAL_ID ] && REMOTE=$NODE_NAME
((NODECOUNT++))
done < <(cman_tool nodes | awk '!/^Node/{print $1,$NF}')

if [ $NODECOUNT -ne 2 ]; then
logger -t $0 "Only works with 2 node clusters"
exit 1
fi

if [ -z "$REMOTE" ]; then
logger -t $0 "Could not determine remote node"
exit 1
fi

logger -t $0 "Local node ID: $LOCAL_ID / Remote node: $REMOTE"

# Killing the remote node if it's still part of the cluster
cman_tool kill -n $REMOTE 2>&1 | logger -t $0

# Shoot the other guy.
for FENCE_ATTEMPT in $(seq 0 9); do
#
# 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

sleep 3
done

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

{{footer}}

Obliterate-peer.sh (DRBD fence handler) - Revision history

Digimer at 03:22, 5 May 2013

Digimer: moved Obliterate-peer.sh to Obliterate-peer.sh (DRBD fence handler)

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..."