Hi,
John Buttery wrote on 30.01.2007 at 17:16:53 [[BackupPC-users] BackupPC
exclusion per-share using arrays in $Conf{BackupFilesExclude}]:
> I'm wondering if I've got the syntax right for this stuff...it looks
> right, but I can't find any actual examples anywhere and some of the
> files that I think should be excluded by this, aren't.
> [...]
> ----- cut here
> $Conf{XferMethod} = 'rsync';
> $Conf{RsyncShareName} = ['/','/usr','/var','/home'];
> ----- cut here
> $Conf{BackupFilesExclude} = {
> '/' => [
> '/dev',
> '/tmp',
> '/mnt',
> '/floppy',
> '/cdrom',
> '/proc'
> ],
>
> '/var' => [
> '/log/maillog',
> '/lib/mysql/data',
> '/lib/mysql/mysql',
> '/log/mysql/mysql.log',
> '/log/mysql/mysql-bin*',
> '/spool/exim4'
> ],
> };
> ----- cut here
seems correct, but: do your RsyncArgs include --one-file-system (or -x)? If
not, the files you are trying to exclude might be included in unexpected
ways (eg. /log/maillog relative to /var would not be excluded if seen as
/var/log/maillog relative to /). I'm not exactly sure though, what would
happen if you backed up ['/', '/usr', '/var', '/home'] *without*
--one-file-system.
> When excluding directories, do I need to put a trailing '/' character?
No, but you can. '/foo/' will match /foo (relative to the "share") only if it
is a directory. A *file* /foo would be backed up, as would a *softlink*
/foo, even if it points to a directory (only the softlink though, not the
directory it points to). Obviously, only either a file or a directory (or a
softlink) of the same name can exist at one point in time.
If a directory is matched by an exclude, and it is thus excluded, then so are
its contents.
So, with absolute paths (and without wildcards), you usually don't need a
trailing /, because you know which directories you are referring to, and that
they will always be directories and not suddenly files.
You *should* add the / if you anticipate replacing the directory with a
softlink to someplace else, and would want the softlink included.
> Are wildcards allowed?
Yes, the shell metacharacters * and ? and character sets in []. Additionally,
there is a ** which also matches path separators (slashes). /usr/*/bin/foo
would match /usr/X11R6/bin/foo but not /usr/bin/foo or
/usr/share/backuppc/bin/foo, /u**/foo would match both /usr/X11R6/bin/foo
and /usr/bin/foo (and maybe /unix/is/great/fun/foo).
> When specifying directory names inside the
> per-share array, do I put the leading '/' characters?
If you want to match to be anchored, then yes. bin/bar would match /bin/bar,
/usr/bin/bar, /usr/X11R6/bin/bar and so on. /bin/bar will only match
/bin/bar. These examples assume a "share" / -
'/usr' => [ '/bin/foo' ]
would only match a file /usr/bin/foo, *not* /bin/foo. You've got that
correct, I just wanted to emphasize it.
This is where trailing slashes might come in. *.iso/ would match only
directories named <something>.iso, not files, and log/ would match only log
directories, not files named "log".
For more details, look at the rsync man page, section "INCLUDE/EXCLUDE
PATTERN RULES".
> Also, this backup fails with the following error [...]
> - hostname (aborted by signal=ALRM)
That is usually an indication that you should increase $Conf{ClientTimeout},
especially if it always happens roughly at the same time (by default when
the backup job has been running for two hours). Just double the value or add
a zero (at the end :) and see if that changes anything. If you don't have
'--one-file-system', add that first. Backing up first everything, then /usr,
then /var and then /home might take longer than just doing it once (if that
is what happens) ;-).
Regards,
Holger
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