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OpenBSD Backup & Restore

Last updated: 2009-06-31

See also "OpenBSD RSync" and "OpenBSD Disaster Recovery" docs.

Backup Script:

The following example backup script makes a single copy of the system directories and files, and a 7 previous day retention backup of the data directories.

Here is an example of my backup script:

#!/bin/bash

# Backup script by Carey Hildebrand

# RSync options:
OPTS="-ax --ignore-errors --delete --force --stats"
# For more log file details use the next commented line instead:
# OPTS="-axv --ignore-errors --delete --force --stats --progress"

# List of system directories to backup, separated by spaces:
SRC1="/ /tmp /usr /var"

# Destination of all system directories:
# Make sure this directory tree exists.
DEST1="/wd1/Backup/System/"

# List of data directories to backup, separated by spaces:
SRC2="/home"

# Destination of all data directories:
# Make sure this directory tree exists.
DEST2="/wd1/Backup/Data/"

# Day of the week for 7 day data backup retention:
WKDAY=`date "+%A"`

for d in $SRC1; do

rsync $OPTS $SRC1 $DEST1 >> /var/log/rsync_system_backup.log

done

for d in $SRC2; do

rsync $OPTS $SRC2 $DEST2$WKDAY/ >> /var/log/rsync_data_backup_$WKDAY.log

done

Save/edit file:

# vi /usr/local/sbin/rsync_backup

Make executable:

# chmod +x /usr/local/sbin/rsync_backup

To Execute:

# rsync_backup

To View Log Files:

# cat /var/log/rsync_system_backup.log
# cat /var/log/rsync_data_backup_<Weekday>.log

Scheduled Backups:

Use a CRON job to do an auto-backup every night.

See "OpenBSD CRON" for details.

Sample code to add our backup script to the root user crontab file:

# echo "" >> /var/cron/tabs/root
# echo "# Execute scheduled backup script every night at 12:30am" >> /var/cron/tabs/root
# echo "30 0 * * * /usr/local/sbin/rsync_backup" >> /var/cron/tabs/root
# echo "" >> /var/cron/tabs/root

Restoring Data:

Since we used rsync to backup our data with permissions, you can easily use rsync to restore the directories or single files as required.

Examples:

Restores the /home directory:

# rsync -av --ignore-errors --delete --force --stats --progress /wd1/Backup/Data/Wednesday/home /home