libvirt_vm_backup/backup_VM_proto at master · absinthetized/libvirt_vm_backup · GitHub

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#!/bin/sh

#backup_VM_proto: prototype backup script for libvirt VM, with versioning
#    Copyright (C) 2016  matteo nunziati

#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.

#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.

#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

#a space separated list of VM names as shown by 'virsh list'
VMS=""
#a comma separated list with dest mail to send the backup log to (NO SPACES)
MAILTO=""
#how many backups would you like to keep? must be >= 1
KEEP="10"

#this is the sender email address configured in sendmail
FROM=""

#usually you do not want to change these!
LOG="/var/log/virt-backup.log"
BKDIR="/var/lib/libvirt/backup"
COMPRESS="pbzip2"

> $LOG

for VM in $VMS; do
	date >> $LOG
	echo config keeps latest $KEEP backups >> $LOG

	echo "backing up VM $VM..." >> $LOG
	/root/virt-backup.pl --action=dump --backupdir=$BKDIR --vm=$VM --compress=$COMPRESS --debug 1>> $LOG 2>&1

	TAR_NAME="$BKDIR/$VM.$(date +%F-%H-%M-%S).tar"
	echo creating tar archive $TAR_NAME >> $LOG
	tar cvf $TAR_NAME $BKDIR/$VM 1>> $LOG 2>&1

	#ok the following is not so efficent but how cares...

	echo " " >> $LOG
	echo "seeking for exceeding backups..." >> $LOG
	BACKUPS=$(ls -1 $BKDIR/$VM.*.tar | wc -l)

	echo "found $BACKUPS (required was $KEEP):" >> $LOG
	ls -1 $BKDIR/$VM.*.tar 1>> $LOG 2>&1
        echo " " >> $LOG

	#hypotesis is that we have no more than one exceeding backup to kill
	if [ $BACKUPS -gt $KEEP ]; then
		ONE_OUT=$(ls -1 $BKDIR/$VM.*.tar | head -1)
		echo going to kill $ONE_OUT >> $LOG
		rm -f $ONE_OUT 1>> $LOG 2>&1
	fi

	echo " " >> $LOG
	echo "clean up folders" >> $LOG
	rm -rvf $BKDIR/$VM $BKDIR/$VM.meta 1>> $LOG 2>&1

	date >> $LOG
	echo "...done" >> $LOG
	echo "-------" >> $LOG
done

cat $LOG | mail -s "VM backup report" -r "VM-BACKUP-ROBOT<$FROM>" $MAILTO