Hi,
I am trying to setup a basic backup script for a Debian 6.0.5 server and
am wanting to validate the scripts I have so far.
Here is the scenario...
The server has 2 x 1Tb hard drives in RAID 1 config. A third 1Tb hard
drive is used for scheduled rsync snapshots.
I also have 5 x USB 3.0 1Tb hard drives for taking backups off site.
The aim is to plug one of the external hard drives and rsync the
snapshot backup to it automatically.
Using udev rules I now have the hard drives being recognised on plug in
and udev firing off a test script.
As it is not a good idea to block up udev by running the backup script
from the udev rule, I need a staging script to start the backup, but not
immediately.
The backup script is intended to be run 1 minute after the external hard
drive is plugged in, and this is what I have come up with:
Staging Script
==============
/data/backups/scripts/start-disk-1.sh
#!/bin/bash
echo /data/backups/scripts/backup-disk-1.sh | at now + 1 minute
Is this the correct way to call the backup script, or is there a better way?
Backup Script
=============
Now the backup script needs to do certain things.
1) Mount the hard drive and fail if necessary.
2) Carry out the rsync to the external hard drive.
3) Unmount the external hard drive.
4) Generate a log of the backup process.
4) Send an email with the log as the message body.
I have not figured out how to generate the log.
I am not sure of my script syntax including " vs ' vs ` delimiters.
The actual backup script I have come up with is as follows... (I hope
email line wrapping doesn't ruin the script layout.)
/data/backups/scripts/backup-disk-1.sh
#!/bin/bash
# Backup to Disk 1
# Set Variables for Script
backup_description=Disk-1
backup_source='/data/snapshots/'
backup_target='/data/backups/disk-1'
start_date_time='date +%Y-%m-%d-%H:%M:%S'
from_addr='x...@abc.com'
to_addr='a...@xyz.com'
cc_addr='d...@uvw.com"
subject='${backup_description} backup at ${current_date_time}'
smtp_server='smtp.somewhere.com'
user_name='x...@abc.com'
mail_pwd='password'
backup_log_file='/data/backup/logs/${backup_description}-${start_date_time}.log'
# Check if another backup is already in progress. If not, create a
progress file, else fail.
if -a /data/backups/${backup_description}-in-progress; then
echo "FAIL ${backup_description} backup already in progress."
exit 1
else touch /data/backups/${backup_description}-in-progress
fi
# Start disk mount process
echo "${backup_description} Automatic Backup Starting at ${start_date_time}"
# Check and mount hard drive if not already mounted.
if ! mountpoint -q ${backup_target}/; then
echo "Mounting the external hard drive."
echo "External hard drive mounted at ${backup_target}"
if ! mount ${backup_target}; then
echo "FAILURE! An error was returned during mounting of hard
drive."
rm /data/backups/${backup_description}-in-progress
exit 1
else echo "External hard drive mounted successfully.";
fi
else echo "${backup_target} is already mounted, but should not be. Check
logs!";
fi
# If hard drive is still not mounted, exit ungracefully
if ! mountpoint -q ${backup_target}/; then
echo "FAILURE! Mounting of external hard drive failed!"
rm /data/backups/${backup_description}-in-progress
exit 1
fi
# Start actual rsync backup
echo "Start of rsync backup."
sudo rsync --archive --verbose --human-readable --itemize-changes
--progress --delete ${backup_source} ${backup_target}/
# Remove backup in progress file
rm /data/backups/${backup_description}-in-progress
# Unmount external hard drive
umount ${backup_target}
# Set backup finish time
finish_date_time='date +%Y-%m-%d-%H:%M:%S'
# End of backup message
echo "${backup_description} Automatic Backup finished at
${finish_date_time}."
# Send eMail Log of backup
sendemail -f ${from_addr} -t ${to_addr} -u ${subject} -m
${backup_log_file} -s ${smtp_server} -cc ${cc_addr} -xu ${user_name} -xp
${password}
Any help with this would be gratefully received.
Kindest Regards
Craig A. Adams
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