Tony Whitmore wrote:
Hi,
I've been working on using Bacula on our site (~500 PCs) for the last week or
so, and have made great progress on test systems. I'll be backing up about 7
or 8 servers once it's all up and running.
On the "proper" backup system I will be using 200GB USB2 external HDDs as the
stoarge medium. (We already have these as part of our existing backup system.)
These will be plugged into the Bacula server (which is running the director,
database and storage daemons). I want to be able to use the HDDs one
at a time - i.e. have one HDD out and the others locked in the safe.
What I'm not too sure on is how to configure Bacula to live with the scenario,
as potentially each HDD could occupy the same device node and mount point.
From what I can see, it could get confused about the absence of certain
volumes, as there would be no apparent difference between the drives once
they are mounted - apart from their contents, of course. I
read in the manual section referring to multiple tape drives about creating a
series of symlinks in a directory to point to a number of different
volumes - would this be appropriate here? Would Bacula be able to cope
with the absence of a drive and prompt for its connection? Or is there a
better approach of managing this scenario?
I am running Bacula on Debian Sarge, using the stock Debian version of the
software.
Thanks in advance,
Tony Whitmore
Hi Tony,
I had the same problem you have some 1,5 years ago. Here are the scripts
I used to work around it (made to work on a Mandrake/Mandriva system):
We make full backups every time. If you want to work with incremental
backups, you should make two pools. One for the full backups and one for
the incrementals. You can write the incrementals of the previous week on
the USB-disk of the full backup of the next week. Each disk will then
contain two volume files.
In our case each disk contains only one volume file which is what we
recognize it by.
#!/bin/bash
#
# shell script to finalize USB backup
volumename=$1
echo " Creating mount points, if they don't exist"
if ! [ -d /mnt/usbdrv ] ; then
mkdir /mnt/usbdrv
fi
if ! [ -d /mnt/usbdrv/bacula ] ; then
mkdir /mnt/usbdrv/bacula
fi
if ! [ -d /mnt/usbdrv/misc ] ; then
mkdir /mnt/usbdrv/misc
fi
#unmount all mount points related to USB
echo " Making sure no USB devices are mounted"
umount /mnt/usbdrv
umount /mnt/usbdrv/bacula
umount /mnt/usbdrv/misc
umount /mnt/removable
umount /mnt/removable2
umount /mnt/removable3
#determine which /dev/sd? contains the right USBVolume for this backup
echo " Determining whether the right USB device containing our
USBVolume is present physically"
found=nothing
for i in sda sdb sdc sdd sde; do
sd=$i"1"
echo " Trying with $sd"
mount /dev/$sd /mnt/usbdrv/bacula -t ext2
ls -al /mnt/usbdrv/bacula
if [ -f /mnt/usbdrv/bacula/$volumename ] ; then
found=/dev/$i
fi
umount /mnt/usbdrv/bacula
done
echo
echo " Found: $found containing $volumename "
echo
if [ $found != nothing ] ; then
# mount /mnt/usbdrv/bacula and /mnt/usbdrv/misc on /dev/sd?1 and
/dev/sd?5 respectively
mount $found"1" /mnt/usbdrv/bacula -t ext2
mount $found"5" /mnt/usbdrv/misc -t vfat
# copy Ghost images of Windows system drives, the contents of
/etc/bacula/*
# and a text file with restore instructions to /mnt/usbdrv/misc
echo " Copying Ghost image of TOSFEB31 to /mnt/usbdrv/misc"
cp -v /mnt/Ghost/PROD/TOSFEB31/SYSTEM.GHO /mnt/usbdrv/misc
echo " Copying Ghost image of TOSFEB32 to /mnt/usbdrv/misc"
cp -v /mnt/Ghost/PROD/TOSFEB32/COFTF32.GHO /mnt/usbdrv/misc
echo " Copying /etc/bacula to /mnt/usbdrv/misc"
cp -Rfv /etc/bacula/ /mnt/usbdrv/misc
echo " Copying Restore instructions to /mnt/usbdrv/misc"
cp -v /etc/bacula/How_To_Restore.txt /mnt/usbdrv/misc
# copy the current USBVolume to /mnt/usbdrv/bacula overwriting the
previous volume file
echo
echo " Copying Bacula USB-volume to /mnt/usbdrv/bacula"
cp -fv /mnt/spool/$volumename /mnt/usbdrv/bacula
# give some feedback about what was done
echo
echo " Directory contents of /mnt/usbdrv/bacula"
ls -al /mnt/usbdrv/bacula
echo
echo " Directory contents of /mnt/usbdrv/misc"
ls -al /mnt/usbdrv/misc
# unmount /mnt/usbdrv/bacula and /mnt/usbdrv/misc
echo
echo " Directory contents of /mnt/usbdrv/misc"
ls -al /mnt/usbdrv/misc
# unmount /mnt/usbdrv/bacula and /mnt/usbdrv/misc
echo
echo " Unmounting /mnt/usbdrv/... mount points"
umount /mnt/usbdrv/bacula
umount /mnt/usbdrv/misc
else
# send emails if correct medium is not present
# /usr/sbin/smtp
echo "hello"
fi
# This is run as a RunAfterJob of the catalog backup. It already had a
RunAfterJob, so we execute that here
/etc/bacula/delete_catalog_backup
This one I use as an admin job on Friday, before our weekly backup gets
written:
#!/bin/bash
#
# shell script to check which USB volume is connected.
volumename=$1
echo " Creating mount points, if they don't exist"
if ! [ -d /mnt/usbdrv ] ; then
mkdir /mnt/usbdrv
fi
if ! [ -d /mnt/usbdrv/bacula ] ; then
mkdir /mnt/usbdrv/bacula
fi
if ! [ -d /mnt/usbdrv/misc ] ; then
mkdir /mnt/usbdrv/misc
fi
#unmount all mount points related to USB
echo " Making sure no USB devices are mounted"
umount /mnt/usbdrv
umount /mnt/usbdrv/bacula
umount /mnt/usbdrv/misc
umount /mnt/removable
umount /mnt/removable2
umount /mnt/removable3
#determine which /dev/sd? contains the right USBVolume for this backup
echo " Determining whether the right USB device containing our
USBVolume ($volumename) is present physically"
found=nothing
for i in sda sdb sdc sdd sde; do
sd=$i"1"
echo " Trying with $sd"
mount /dev/$sd /mnt/usbdrv/bacula -t ext2
ls -al /mnt/usbdrv/bacula
if [ -f /mnt/usbdrv/bacula/$volumename ] ; then
found=/dev/$i
foundvol=$volumename
else
for vn in USBVolume0001 USBVolume0002 USBVolume0003; do
if [ -f /mnt/usbdrv/bacula/$vn ] ; then
found=/dev/$i
foundvol=$vn
fi
done
fi
umount /mnt/usbdrv/bacula
done
echo
echo " Found: $found containing $foundvol "
echo
if [ $foundvol=$volumename ] ; then
exit 0
fi
if [ $found != nothing ] ; then
exit 0
else
echo No external USB drive is connected! Please find out which drive
is needed and connect it.
echo This probably should be $volumename
echo
echo
exit -1
fi
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