Bug#505996: bcfg2: Include random Sleep before running on cronjob
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 There are already a couple ways to do this using either TCheetah or TGenshi templating systems. Both are on the wiki: http://trac.mcs.anl.gov/projects/bcfg2/wiki/TCheetahPlugin http://trac.mcs.anl.gov/projects/bcfg2/wiki/TGenshi/examples/bcfg2_cron This will allow you to use python's random implementation while giving reproducable results (seeded by hostname). HTH, Sol -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.7 (GNU/Linux) Comment: http://getfiregpg.org iD8DBQFJTUCKgLhJL6iP/0sRAm3zAKCuFXnG3aT5G3E0iO4aU/hmXqiyHACgrnWS X1nQJ/HRaluIjQlN1od0TMA= =4Hds -END PGP SIGNATURE- -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#505996: bcfg2: Include random Sleep before running on cronjob
Package: bcfg2
Version: 0.9.5.7-1.1
Severity: wishlist
Hi there,
Right now all bcfg2 clients will run at the very same time in a common
scenario (i.e. from the cronjob provided) that can, in my case does,
kill the server. Maybe the cron job could do some random sleeping
before running the agent, just like /etc/cron.daily/apt does, i.e:
sleep `$(($(dd if=/dev/urandom count=1 2 /dev/null | cksum | cut -c1-5) %
1800))`
Or, from /etc/cron.daily/apt:
# sleep for a random interval of time (default 30min)
# (some code taken from cron-apt, thanks)
random_sleep()
{
RandomSleep=1800
eval $(apt-config shell RandomSleep APT::Periodic::RandomSleep)
if [ $RandomSleep -eq 0 ]; then
return
fi
if [ -z $RANDOM ] ; then
# A fix for shells that do not have this bash feature.
RANDOM=$(dd if=/dev/urandom count=1 2 /dev/null | cksum | cut -c1-5)
fi
TIME=$(($RANDOM % $RandomSleep))
sleep $TIME
}
That would distribute the hourly load spike a bit ;)
Thanks,
Marc
-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (900, 'testing'), (300, 'unstable'), (150, 'experimental'), (100,
'stable')
Architecture: i386 (i686)
Kernel: Linux 2.6.26-1-686 (SMP w/2 CPU cores)
Locale: LANG=es_ES.UTF-8, LC_CTYPE=es_ES.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
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Bug#505996: bcfg2: Include random Sleep before running on cronjob
Hi, On Mon, 2008-11-17 at 17:26 +0100, Marc Fargas wrote: Right now all bcfg2 clients will run at the very same time in a common scenario (i.e. from the cronjob provided) that can, in my case does, kill the server. Maybe the cron job could do some random sleeping before running the agent... That's actually a really good idea. The only problem is that sleeping while doing cron.daily run will cause the rest of the jobs to be delayed within that cron.daily run. It might be better to detach the process and run the job after waiting a random time. Also, it might be a good idea to allow the user to configure the offset since in some cases it is critical for the client to run the job as close as possible to the given time. I'll see what i can come up with =) - S -- Sami Haahtinen [EMAIL PROTECTED] signature.asc Description: This is a digitally signed message part
