Oh, sorry, I really got confused with this mail.
Hello,
thank you for the comments regarding readlink. Unfortunately, it does
not work :(
if I do:
bash>readlink /dev/vmguests/backup
I get:
../dm-6
I was suspicous about the relative path but this can be healed by adding -f:
bash>readlink -f /dev/vmguests/backup
/dev/vmguests/dm-6
With this new weapon I changed the File = directive as described in your
mails: File = "| readlink /dev/vmguests/backup".
I open bconsole, do reload, do run, select job ... and get 89 bytes
backuped.
( I tested also the -f variant)
I cross checked by changing File= "/dev/dm-6". This saves 4.4GB of data.
My guess is that the link does not yet exist when the Fileset is parsed.
How can I find out about this. Can I raise the log level to see the
parsed version of File= ?
Thank you for any advice,
Tobias
Am 19.09.2011 10:35, schrieb Konstantin Khomoutov:
> On Sun, 18 Sep 2011 17:47:34 +0200
> Tobias Schenk<tob...@die-schenks.net> wrote:
>
>> I try use bacula 5.0.3 on suse linux to backup lvm snapshots.
>> Basically, I create a lvm snapshot called /dev/vmguests/backup using
>> the RunScript directive. Unfortunately, this is a sym link
>> to /dev/dm-6. I cannot be sure it is always dm-6. I would like to
>> follow the sym link and backup /dev/dm-6 as raw device.
>>
>> The hints I found while googling are are not working (like
>> appending /. to the File directive) or obscure (like using bash
>> scripting to resolve File names).
>> I cannot simply mount /dev/dm-6 to somewhere because the contents is
>> a partitioned raw device of a kvm instance.
>> Maybe it is possible resolve the link using a bash script in the file
>> directive
> You can use the `readlink` command to resolve the symlink.
>
>> but I have not found information about when the File
>> directive will be evaluated relative to RunScript.
>>
>> Has anyone a working solution for lvm snapshots?
>>
>> The Job currently looks very plainly like this:
>>
>> FileSet {
>> Name = FsVMMyDms # Adjust to VM
>> Include {
>> Options {
>> compression = GZIP
>> signature = SHA1
>> sparse = yes
>> }
>> File = /dev/vmguests/backup
>> }
>> }
> You can try to use something like
>
> File = "| readlink /dev/vmguests/backup"
>
> to dynamically read that file containing the real device name.
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