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