various scripts for various tasks.
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#!/bin/sh
# zfsync: sync zfs pool(s) between two servers
# before first use, or in case of failure, unexpected reboot while syncing, etc.:
#
# launch "zfsync.sh init"
#
# or manually:
#
# - destroy all snapshots on both local & ${bro}
# - for i in ftp web mail; do zfs snapshot servers/$i/home@newsync ;done
# - for i in ftp web mail; do zfs send servers/$i/home@newsync | ssh ${bro} zfs receive -vFd servers ;done
# - for i in ftp web mail; do zfs rename servers/$i/home@newsync servers/$i/home@prevsync ;done
# - ssh ${bro} 'for i in ftp web mail; do zfs rename servers/$i/home@newsync servers/$i/home@prevsync ;done'
#
# once init is done, call it using crontab:
# */10 * * * * root nice -n 19 /usr/local/bin/zfsync.sh >/tmp/zfsync.log
bro="small"
pools="ftp mail web"
SENDNSCA=/usr/local/sbin/send_nsca\ -H\ 192.168.X.X\ -d\ ';;'\ -c\ /usr/local/etc/nagios/send_nsca.cfg
HOSTNAME=`/bin/hostname -f | /usr/bin/cut -d '.' -f 1,1`
SERVICENAME=zfsync
LOGFILE=/tmp/zfsync.log
LOCKFILE=/tmp/zfsync.lock
ZROOT=zdata/servers
sync_success=1
if [ -e $LOCKFILE ]
then
echo "ERROR: $0 is already running with pid `cat $LOCKFILE`, check $LOCKFILE"
exit 1
fi
echo ${$}>$LOCKFILE
alert()
{
echo "${HOSTNAME};;${SERVICENAME};;2;CRITICAL - ZFS Sync failed at `date`, please check ${LOGFILE} for complete report." | ${SENDNSCA} >/dev/null
exit $?
}
if [ $1 ]
then
if [ $1 = "init" ]
then
echo "`date`: ZFSync INIT starting."
echo "wiping previous syncs"
for snapshot in `zfs list -t snapshot -o name | grep -e prevsync -e newsync`; do zfs destroy $snapshot ; done
ssh -q ${bro} 'for snapshot in `zfs list -t snapshot -o name | grep -e prevsync -e newsync`; do zfs destroy $snapshot ; done'
echo "making full snapshots"
for jail in $pools; do zfs snapshot $ZROOT/$jail/home@newsync;done
echo "sending full snapshots"
for jail in $pools; do zfs send $ZROOT/$jail/home@newsync | ssh -q ${bro} 'zfs receive -vFd zdata' ;done
echo "renaming them to use them as a base for diff snapshots"
for jail in $pools; do zfs rename $ZROOT/$jail/home@newsync $ZROOT/$jail/home@prevsync ;done
ssh -q ${bro} 'for jail in ftp mail web; do zfs rename zdata/servers/$jail/home@newsync zdata/servers/$jail/home@prevsync ;done'
echo "`date`: ZFSync INIT ending."
exit $?
fi
fi
echo "`date`: ZFSync starting."
for pool in $pools
do
dataset="$ZROOT/${pool}/home"
echo "making new snapshot for ${pool}"
zfs snapshot ${dataset}@newsync || alert
echo "sending snapshot"
zfs send -i @prevsync ${dataset}@newsync | ssh -q ${bro} "zfs receive -vFd zdata" || alert
echo "cleaning"
zfs destroy ${dataset}@prevsync || alert
zfs rename ${dataset}@newsync ${dataset}@prevsync || alert
ssh -q ${bro} "zfs destroy ${dataset}@prevsync && zfs rename ${dataset}@newsync ${dataset}@prevsync" || alert
done
echo "`date`: ZFSync ending."
echo
echo "${HOSTNAME};;${SERVICENAME};;0;OK - ZFS Sync succeeded at `date`" | ${SENDNSCA} >/dev/null
rm -f $LOCKFILE