Jason
We use a check in the bash script that runs rdiffbackup. This puts a pid
file into the var run directory and causes the script to block if the
script has not cleared it at the end.
if test -e /var/run/remotebackup.pid; then
echo "Backup is already running!"
echo "If it isn't, remove /var/run/backup.pid and try again."
exit 0;
else
echo $$ > /var/run/remotebackup.pid;
fi
...do the work here
# Remove lock file and end script
#
if test -e /var/run/remotebackup.pid; then
rm /var/run/remotebackup.pid;
else
echo "Could not remove lock file!" >> $LOGFILE
fi
Peter Howell
Jason L. Buberel wrote:
On my backup server I use rdiff-backup to remotely backup several
rather large postgres database installations (using the postgres
hot-backup capability). Under certain circumstances, these backups can
take a very long time to complete.
The execution of these backups is scheduled via cron.
And when they take a very, very long time they can start to overlap.
When this happens, I get an error message from rdiff-backup:
Fatal Error: It appears that a previous rdiff-backup session with process
id 21022 is still running. If two different rdiff-backup processes write
the same repository simultaneously, data corruption will probably
result. To proceed with regress anyway, rerun rdiff-backup with the
--force option.
Fatal Error: Lost connection to the remote system
I would like to write a small script called 'exit-if-already-running.sh' that
takes the name of an rdiff-backup directory (the directory containing the
directory named 'rdiff-backup'), and exits with return code 1 if a back is
already in progress. That would allow me to use it as such:
10 5 * * * root /usr/local/bin/exit-if-already-running.sh /backup/srv1 &&
/usr/bin/rdiff-backup srv1::/remote-dir /backup/srv1
What is the most reliable method to determine if rdiff-backup is already
running on the destination directory?
Thanks,
Jason
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