#!/bin/bash
# ve_dumps.sh
# Dump all VEs

# Todays' date
DATE=$(date +%d)

# Paths
BAK_PATH=/backup
# Week of month
BAK_DIR=$(cal | awk -v date="${DATE}" '{ for( i=1; i <= NF ; i++ ) if ($i==date) { print FNR-2 } }')

# Function to check and remove previously failed snapshot.
check_vzsnap() {
  OUTPUT=`/usr/sbin/lvdisplay | grep vzsnap`
  [ -n "$OUTPUT" ] && lvremove -f /dev/vg0/vzsnap
}

# Function to perform backup.
backup() {
  # Check and create the required backup directory
  [ -d "${BAK_PATH}/${BAK_DIR}" ] || mkdir -p ${BAK_PATH}/${BAK_DIR}
  # do dumps
  echo "Starting dump at `date`"
  /usr/bin/vzdump --exclude-path '.+/log/.+' --exclude-path '.+/bak/.+' --exclude-path '/tmp/.+' --exclude-path '/var/tmp/.+' --exclude-path '/var/run/.+pid' --snapshot --dumpdir=${BAK_PATH}/${BAK_DIR} --compress --all
  echo "Completed dump at `date`"
}

# Main ############################

# Remove previously failed snapshot
check_vzsnap

# Run backups
backup

exit 0

# weekly dump of VEs
21 1 * * sun /usr/local/bin/ve_dumps.sh