Alex Schuster <wo...@wonkology.org> wrote:
> Iain Buchanan writes:
>
> > On Thu, 2010-04-29 at 16:44 +0200, Alex Schuster wrote:
>
> > > using this script, adapted to their needs, I started to rewrite it in
> > > a way that it reads a config file, and no modification of the script
> > > itself is necessary. If anyone is interested, send me an email.
> >
> > interested! So is it on sourceforge yet ;)
>
> Sorry, it took a little longer. I was ill, and then these scripts tend to
> grow and grow until I am satisfied with them. It's still not perfect, but
> I think at the moment it does what it should do.
>
> Still not on sourceforge, but here: http://www.wonkology.org/utils/snackup
> The name is silly, but I kinda like it now. A backup utilizing LVM
> snapshots... snapshot backup... snackup!
>
> It needs a config file that is looked up in some default locations, or can
> be specified with the -c option. Use option -T to generate a template that
> has information on the syntax and some examples. In short:
>
> The config file defines targets you give as arguments to snackup. So
> 'snackup home' backs up your /home partition, 'snackup etc' creates a .tgz
> file of your /etc. The config file is sourced, so you can put any bash
> stuff you want into there, like some shell functions you want to have
> executed. For example, I want my /var/log/portage/*.log files to be
> compressed before I backup my /var partition.
>
> A target is started by a colon, followed by name, type, source and
> destination (and optionally more), separated by one or more tab
> characters. Type can be 'cp', 'dd', 'tar', 'rsync' or 'rdiff'. I only
> tested dd, tar and rdiff so far, though. The source directory may be
> prefixed by the volume group and LVM of that partition in order to create
> an lvm snapshot first. You may add a LUKS key if the partition is
> encrypted. The source may contain wildcards. In that case, all matching
> files are backed up to the destination. If the type has a * appended, all
> matching files are backed up individually. Some examples:
>
> : tar kde .kde* /backup/kde.%s
>
> Target 'kde' will backup all your .kde* directories to /backup/kde.tar
> (the %s is replaced by a suffix, usually tar). You need to be in your home
> directory, otherwise the path will not be found. This is not necessary if
> you use ~//.kde* instead.
>
> : kernels tar* /usr/src//linux-* /backup/src/%f.%s
> -j - lsf
>
> Target 'kernels' will backup your /usr/src/linux-* directories
> individually - one tar file for each (note the * appendended to the tar
> target type). The -z option will be passed to the tar command, and the
> suffix is changed to tgz accordingly.
> The // denotes that the backup should be done locally from the directory
> left to the //. Otherwise, the full path would be included in the tar
> file.
>
> : tar etc /etc /backup/etc_%d.%s
> -j
>
> Target 'etc' will tar your /etc directory, compressed with bzip2. The %d
> will be replaced by the current date. You can change the date format by
> re-defining a date() shell function.
> You will get a message about tar removing the leading /, you can avoid it
> by replacing /etc by ///etc, meaning that your local directroy will be /.
>
> : boot dd /dev/sda5 /dev/sdb5
> bs=32M
>
> Target 'boot' will backup a boot partition with dd. Options like the
> bs=32M are added directly to the dd command.
>
> : home rsync system/home::. /backup/home/
>
> Target 'home' will create a LVM snapshot of the /dev/system/home logical
> volume, mount it and back it up with rdiff-backup. The '.' could also be a
> / or left off.
>
> : var rsync system/var::/ /backup/var/ - ziplog
>
> Similar, but the command ziplog will be executed before the backup,
> compressing some log files. It must be defined in the config file.
>
> The script has some options:
>
> -c file location of config file
> -C clear destination first
> -d dummy mode, just show what would be done
> -f force backup (the initial rdiff-backup may need this)
> -h show this help
> -l output to log file, too
> -L log file (default:/home/wonko/log/snackup.log); may be a
> directory (add a trailing slash) to create target-specific logs
> -n l use nice level l (default:10, 0 to turn off)
> -N l use ionice level l (default:3, 0 to turn off)
> -o extra options that will added to the actual backup command
> -s size size of LVM snapshot (default:2G)
> -S char replace tab as delimiter for targets in config file
> -T output config file template
> -v verbose output; may be given multiple times
> 1: some extra output; 2: add -v to commands; 3: set -xv
> -V output version information and exit
>
> Most important are:
> -c to specify the location of the config file
> -d to output what would be done, you will see the final tar / rdiff-
> backup / whatever command with all its options.
> -T to see a template. Save it with snackup -T > ~/.snackup and then
> modify your ~/.snackup file.
> -o to add whichever options you like to the final command. These (and -j
> and -z) override options already defined in the config file.
>
> Too complicated? Overkill? Maybe. But I like it, and now I do not have to
> write another script for every system I want to backup. And I like the LVm
> snapshotting to be done automatically. It's not that hard, but it's
> annoying to do it by hand, even more as all my volumes are encrypted.
>
> These are my own targets:
>
> : boot dd /dev/boot
> /dev/sdb5 - -
> -
> : backup rdiff weird/backup::/etc/key::. /backup/weird/backup
> - - -
> : local rdiff weird/local::/etc/key::. /backup/weird/local
> - - -
> : home rdiff weird/home::/etc/key::. /backup/weird/home
> - - -
> : med rdiff weird/med::/etc/key::.
> /backup/weird/med - - -
> : mp3 rdiff weird/mp3::/etc/key::.
> /backup/weird/mp3 - - -
> : mpeg rdiff weird/mpeg::/etc/key::. /backup/weird/mpeg
> - - -
> : opt rdiff weird/opt::/etc/key::.
> /backup/weird/opt - - -
> : root rdiff weird/root::/etc/key::. /backup/weird/root
> - - -
> : usr rdiff weird/usr::/etc/key::.
> /backup/weird/usr - - -
> : var rdiff weird/var::/etc/key::.
> /backup/weird/var - zipLog -
> : etc tar ///etc
> /backup/conf/etc/etc_%d.%s -z - lsf
> : kernels tar* /usr/src//linux-*
> /backup/weird/src/%f.%s -j - lsf
> : portage rsync /var/portage/packages /backup/weird/portage
> - - -
> : kde tar ~//.kde*
> /backup/wonko/home/kde-%d.%s -z - lsf
> : dot tar ~//.??*
> /backup/extern/dot-%d.%s -z - lsf
>
>
> At last, the disclaimer: Use it at your own risk! This is a script of some
> 800 lines of bash code some guy wrote, it messes around with LVM stuff,
> creates and removes temporary directories and even has an option to wipe
> the destination completely. I'm quite confident that no harm will be done,
> and I do not suggest you to take a backup before daring to try this script,
> but anyway.
>
> Use the -d option first to test what actually would be going on, before you
> do a real backup!
>
> Hope this is of good use to someone. For me it is, I will be using it on
> several systems, and now I only have to make little changes in the config
> file for each system, but not at the script.
>
> Suggestions and bug reports are welcome of course.
I have a question -- where would lvm put a snapshot and how could I pass
some list of excludes to rdiff-backup. I have an lvm which is taking
all the PEs and a snapshot would take up lots of disk space -- or would
it. Would I need some free pes to put the snapshot?
Thanks.
--
Your life is like a penny. You're going to lose it. The question is:
How do
you spend it?
John Covici
cov...@ccs.covici.com
