A few weeks ago there was a short thread on a similar theme. See
http://article.gmane.org/gmane.comp.sysutils.backup.bacula.general/31927
and other posts in the thread.
In that thread, the on-site disk-volumes were written first and then
copied to tape for off-site protection.
However your requirement ...
> I'd prefer to do the actual backup to the removable drives in the
> first instance as these are the "critical" ones and I'd like the
> job(s) to fail in the case of full removable-drives.
makes this significantly different.
You said that you are all windows based. Does that include the server
running the storage daemon? Using Linux, you might be able to achieve
what you want using "bind" mounts. Here is an outline of a basic scheme.
Create a directory for the on-site disk-volumes and bind it to the
location where the storage-daemon expects to find them.
mount --bind /on-site/bacula/volumes /var/lib/bacula/volumes
This should be in /etc/rc.d/rc.local or similar.
Your storage-daemon config would include:
Device {
...
Archive Device = /var/lib/bacula/volumes
Device Type = File;
LabelMedia = yes;
Random Access = Yes;
AutomaticMount = yes;
RemovableMedia = no;
AlwaysOpen = no;
...
}
Have a pre-flight (RunBefore) script in a job with a unique, lowest
"Priority" value, to ensure that it runs alone and first. It should
unbind the on-site storage and bind the removable-media.
Pre-flight script:
umount /var/lib/bacula/volumes
mount --bind /media/usbdisk/volumes /var/lib/bacula/volumes
Have a post-flight script in a job with a unique, highest "Priority"
value to ensure that it runs alone and last. It should unbind the
removable disk, copy the disk volumes to the on-site storage, and bind
that to the appropriate disk-volume directory.
Post-flight script:
umount /var/lib/bacula/volumes
rsync -a /media/usbdisk/volumes/ /on-site/bacula/volumes/
mount --bind /on-site/bacula/volumes /var/lib/bacula/volumes
Now the storage daemon will be able to restore from the on-site copy of
the volumes.
In the resource of the Pool to which the disk volumes are assigned, you
should have "Maximum Volume Jobs = 1" to ensure that the disk-volumes
are closed after use. It won't be necessary to know a-priori the names
of the volumes since rsync will only copy new volumes. You should also
be dumping your catalogue and keeping copies of your config files
somewhere.
I haven't thought about issues with recycling but it should be
scriptable.
Hope this helps.
Kel
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