Re: Backup of ACLs
2003-04-03 11:47:13
On Thu, 3 Apr 2003 at 1:15pm, Dalton Hubert wrote
> we are thinking about using ACLs (extended attributes and access control
> lists)
> on our file server, of which we make a full backup by using Amanda every
> night.
>
> So my question concerning the backup is:
> Can Amanda also backup ACLs?
Amanda doesn't do backups. Amanda *schedules* backups. Amanda uses
another program (a dump, or GNUtar) to actually do the backups.
> Do i have to change something in my configuration?
Well, since we don't know what your config is now...
> I have heard something about star, is this really necessary or can i use tar?
tar won't get ACLs. An FS specific dump program probably will.
> If i must use star instead of tar, where i must configure this?
> (which entry in which file?)
I don't know if star is drop-in replaceable for tar. ISTR that it only
does one level of incrementals, which amanda won't like if it needs to
bump some backups.
> Any experiences with ACL in combination with Amanda?
I just started using ACLs on one of my Linux servers using XFS. The
partition is too large for a tape, so I can't use xfsdump (which will get
the ACLs). What I do is have cron run '/usr/bin/getfacl -R $DIR' on the
$DIR in which I'm using ACLs. I dump the output of that somewhere else on
disk that gets backed up. If I have to restore that $DIR, I can just run
'setfacl -R' on the directory after I restore it from tape.
It may not be elegant, but it's what I came up with.
--
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University
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