diff options
| author | Micah Anderson <micah@riseup.net> | 2011-03-15 20:04:18 -0400 |
|---|---|---|
| committer | Micah Anderson <micah@riseup.net> | 2011-03-15 20:05:36 -0400 |
| commit | 31652d945b348175b6fe3a43880a2448a324787b (patch) | |
| tree | fee0ae8ced2126e6c273efff0e9361faab9a16b4 /files/cron.d/puppetd.CentOS | |
| parent | 8aaf0f8b167702dd2b8e4d7e01b33d5915cf4f3b (diff) | |
instead of using $RANDOM, which isn't POSIX, we get even more esoteric by pulling 2 bytes from /dev/urandom, giving them to od which turns them into unsigned decimals, and then we bitshift the output, either by 5 or 6 depending on if we are replacing $RANDOM/1000*60 (right sift by 5 is the same as dividing by 2^N, or /32) or $RANDOM/2000*60 (range of [0,983])
Thanks to dkg for working through this with me, not only did he come up with it faster than a human brain should be able to function, he had the patience to explain all the individual pieces that I did not understand to me.
Diffstat (limited to 'files/cron.d/puppetd.CentOS')
| -rw-r--r-- | files/cron.d/puppetd.CentOS | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/files/cron.d/puppetd.CentOS b/files/cron.d/puppetd.CentOS index 65239ce..a4f84e9 100644 --- a/files/cron.d/puppetd.CentOS +++ b/files/cron.d/puppetd.CentOS @@ -1,5 +1,5 @@ # check if puppet is running -0 * * * * root /etc/init.d/puppet status > /dev/null || (sleep $(($RANDOM/2000*60)) && /etc/init.d/puppet restart) +0 * * * * root /etc/init.d/puppet status > /dev/null || (sleep $(( $(</dev/urandom od -N2 -t u2 -A n) >> 6 )) && /etc/init.d/puppet restart) # restart puppet once in a while and randomly delay the restart between 0 and 32 minutes -> splay puppetmaster hammering -0 22 * * */2 root sleep $(($RANDOM/1000*60)) && /etc/init.d/puppet restart > /dev/null +0 22 * * */2 root sleep $(( $(</dev/urandom od -N2 -t u2 -A n) >> 5 )) && /etc/init.d/puppet restart > /dev/null |