hasync

#!/bin/bash
#HA sync clones periodicaly 2 nodes in a pacemaker+corosync cluster
#This script must be modified to fit your needs. 
#You should use it to to sync debian system software, not service data
#For service data like a database use DRBD o something like that.
#Please look at RESOURCE,MYEXCLUDE,ECLUDE an SERIVCES variables
#is intended to run
#Juan Pedro Paredes Caballero <juanpedro.paredes@gmail.com>

#This the HA resource to stablish who is primary and who is standby
RESOURCE="cluster-ip"
#Exclude
MYEXCLUDE="/etc/mysql/conf.d  /var/lib/mysql"
#This variable permit to stop services while sync is in progress
SERVICES=""

#We take care thar is no other sync in progress
killall -9 rsync 2>/dev/null

#Who is PRIMARY and who is SECONDARY in a corosycn+pacemaker cluster?
STATUS=`/usr/sbin/crm status`
PRI=`/usr/sbin/crm status|/bin/grep $RESOURCE|/usr/bin/awk '{print $4}'`
NODES=`/usr/sbin/crm status|/bin/grep Online|/bin/sed -e 's/Online: \[ //'|awk -F']' '{print $1}'`
#Well, who is the local node and who is the remote for sync?
LOC=`/bin/uname -n`
REM=`/bin/echo $NODES|/bin/sed -e 's/ /\n/g'|/bin/grep -v "$LOC"`


#System exlusions
EXCLUDE=" /proc /sys /sys/fs/fuse/connections /sys/kernel/debug /sys/kernel/security /dev /dev/pts /dev/shm  /var/run /var/lock /lib/init/rw"
EXCLUDE="$EXCLUDE /drbd /etc/hostname /etc/fstab /etc/inittab /etc/network/interfaces /etc/hostname /etc/mtab /etc/blkid.tab /etc/ha.d /etc/udev /boot /etc/corosync /etc/ha.d /var/lib/pengine /var/lib/heartbeat /etc/cron.d/ha-* /var/log"
#Own exclusions
EXCLUDE="$EXCLUDE $MYEXCLUDE"
EXCLUDE=`/bin/echo "$EXCLUDE"|/bin/sed -e 's/ / --exclude=/g'`

#INCLUDE="/var/foo/bar /var/bar/foo*"
#INCLUDE=`/bin/echo "$EXCLUDE"|/bin/sed -e 's/ / --include=/g'`

if [ -n "$PRI" -a -n "$REM" -a "$PRI" = "$REM" ]
then
	#Stop services before sync
	for S in $SERVICES
	do
		/etc/init.d/$S stop
	done
	#Here we can take care about bandwidth used to sync
	#Adding --bwlimit=10000 (in kps)
	#We use the fairsync wrapper to rsync to minimize the use of IO and CPU
	OPTS='--sockopts=SO_SNDBUF=2000000,SO_RCVBUF=2000000 --rsync-path="/usr/local/bin/fairsync"'
	#If we pass the limit param to the script it only sync files 
	#less than 512M
	if [ "$1" = "limit" ]
	then
        	OPTS="$OPTS --max-size=512M"
	fi

	#SYNC!!!
	#We take care about IO and CPU
	cd /
	/usr/bin/nice -n 19 /usr/bin/ionice -c3 /usr/bin/rsync -quav -D --delete-before $OPTS $EXCLUDE $INCLUDE $REM:/ .
	
	#Start services after sync
	for S in $SERVICES
        do
                /etc/init.d/$S start
        done
fi