Cron job seems to run on both master and mirror server

Hi
I seem to have the exact same problem as in this thread
http://www.howtoforge.com/forums/showthread.php?t=53523
Did it ever get solved?
Example: I send email as a result of a filled out form on a website, those emails are sent twice.
I fully understand why it is happening, Server 2 is supposed to be a more or less exact copy of Server 1.
That is the whole meaning of the setup.
But I don't need certain cronjobs to run double.
I could let unison not copy cron catalogue (/etc/cron.d) but if Server 1 fails all cronjobs are Lost.
Any ideas?
//millpark10

 

Till
You are right, of course!
This has, as far as i can understand nothing to do with unison. First part of default.prf:

Code:

# Roots of the synchronization
root = /var
root = ssh://172.17.2.182//var/
 
# Paths to synchronize
path = www
path = vmail
 
# Some regexps specifying names and paths to ignore
#ignore = Path stats    ## ignores /var/www/stats
#ignore = Path stats/*  ## ignores /var/www/stats/*
#ignore = Path */stats  ## ignores /var/www/somedir/stats, but not /var/www/a/b/c/stats
#ignore = Name *stats   ## ignores all files/directories that end with "stats"
#ignore = Name stats*   ## ignores all files/directories that begin with "stats"
#ignore = Name *.tmp    ## ignores all files with the extension .tmp
   
 

Nothing about /etc/cron.d there.
Server1

Code:

root@lenny1:~/.unison# ls -las /etc/cron.d
totalt 36
 4 drwxr-xr-x   2 root root  4096 mar 26 01:48 .
12 drwxr-xr-x 116 root root 12288 mar 24 23:29 ..
 4 -rw-r--r--   1 root root   179 jul 30  2012 amavisd-new
 4 -rw-r--r--   1 root root   258 dec 18 14:30 awstats
 4 -rw-r--r--   1 root root    96 mar 22 23:19 ispc_chrooted_web7
 4 -rw-r--r--   1 root root   544 dec 12 05:43 php5
 4 -rw-r--r--   1 root root   102 jun 19  2012 .placeholder

Server2

Code:

root@lenny2:/etc/cron.d# ls -las
totalt 36
 4 drwxr-xr-x   2 root root  4096 mar 26 01:48 .
12 drwxr-xr-x 116 root root 12288 mar 24 23:37 ..
 4 -rw-r--r--   1 root root   179 jul 30  2012 amavisd-new
 4 -rw-r--r--   1 root root   256 dec 18 14:44 awstats
 4 -rw-r--r--   1 root root    96 mar 22 23:19 ispc_chrooted_web7
 4 -rw-r--r--   1 root root   544 dec 12 05:43 php5
 4 -rw-r--r--   1 root root   102 jun 19  2012 .placeholder

As you can see the cron job and some of the other files have the same timestamp if that might be a clue to this.
Something is copying cron jobs to server2, I don't know what?
Any ideas?
(I still beleive I followed the guides, as of below the line, very thoroughly)
//millpark10

 

Couldn't the cron job command be conditional, checking the hostname and only running if it was on the correct host?

 

That is actually what we are discussing to implement.
I understand that every command I want to use in jail has to be "installed" in jail. Pls help, how can I get /bin/hostname to work in jail? (just cp to /bin in jailed web?)
//millpark10

 

Aha, ok, thank you Till.
Just checking, your command line sems inverted somehow, or is it in the correct order?
jk_cp "fetches" the command into jail maybe?
//millpark10

 

Hi Till
Thank you!
I read http://olivier.sessink.nl/jailkit/ but your answer was close enough!
Slowly working towards all the functions I need. I am genuinely happy for all the help and support. This is going to be good!
//millpark10

 

Prohibit cron to run on server2 in mirrored setup

This is our solution for cron to run on only the first server: First put command "hostname" in jail

Code:

server1:~# jk_cp -j /var/www/clients/client3/web5 -v /bin/hostname

Script for cron to run:

Code:

#!/bin/sh
hostname=$(hostname)
if [ "$hostname" = "server1.example.com" ]; then
wget otherexampleserver.net/crontest.php?hostname=$hostname -O /dev/null
fi

Still in the process to understand how to run wget on the same server, if possible.
//millpark10