SETTING UP DESKTOP BACKUP

When setting up a disk-to-disk backup of desktop partitions one must
keep in mind to:

	(1) try to backup to a different box if available
	(1a) or at least to a different physical media (disk or raid)
	(2) make sure the backup volume is as big or bigger than source
	(3) spread out cron time to not interfer with other backup traffic

For backup, we will use the nmrroot account which should now exist
on each client.

First, create a backup script called /usr/etc/rsyncbackup that uses
rsync.  Here is an example:

==========
#!/bin/sh
ps=`ps auxw | grep 'rsync:' | grep exclude`
if [ -n "$ps" ] ; then
  echo "FAIL: old rsync still running" | \
        mail -s '[hostname] FAILURE' systems@nmr.mgh.harvard.edu
  exit 2
fi

cd /local_mount/space/perun/3 || exit 2
if ! test -f ID-perun-3 ; then echo NO ID-perun-3 ; exit 2 ; fi
touch ID-perun-3
rsync -S -a --delete --numeric-ids --exclude=/lost+found . \
	maple:/local_mount/space/maple/3/BACKUP/perun/3
cd /local_mount/space/perun/4 || exit 2
if ! test -f ID-perun-4 ; then echo NO ID-perun-4 ; exit 2 ; fi
touch ID-perun-4
rsync -S -a --delete --numeric-ids --exclude=/lost+found . \
	maple:/local_mount/space/maple/4/BACKUP/perun/4
=====

make sure all the distination BACKUP directories exist

make this file executable.

if the source machine is running fedora, make sure to add 
-e "rsh" 
to the rsync options.

the first chunk of code checks to see if old rsyncs are still running.


The 'cd' and test for ID-perun-3 are simple tests that the source
volume is okay to prevent backing up a blank volume.  Make sure
those ID-* files exist as they often get forgotten.

Determine the best time to do the backup and then create a
/etc/cron.d/rsyncbackup file such as:

==========
22 4 * * 6 nmrroot /usr/etc/rsyncbackup
==========

which will do the backup every Saturday morning at 4:22am.
Do a 'service crond reload' so the cron server sees it.

Make sure the nmrroot user is defined in /etc/passwd.  If not
run /space/amaebi/1/admin/nmrroot.install

Make sure rsh is enabled on target system and that /nmrroot/.rhosts
and /root/.rhosts has entries for the source box for both nmrroot and root
To enable rsh, edit /etc/xinetd.d/rsh, reload xinetd and add "rsh" to
the bottom of /etc/securetty

Edit /space/sake/5/admin/notes/DesktopBackup.DB to add an entry
for the backups.