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Post general support questions here that do not specifically fall into the Linux or Windows categories.
Moderators: Developers , Moderators
lorell
Posts: 20 Joined: Wed Nov 23, 2005 1:40 pm
Post
by lorell Wed Nov 23, 2005 5:46 pm
crontab simulation:
[root@mpc ~]# su cactiuser
Here's the line in crontab -u root -e:
*/1 * * * * cactiuser php /var/www/html/cacti/poller.php >> /tmp/polleroutput.txt
I set it to 1 minute instead of 5 minutes so I wouldn't have to wait as long.
The /tmp/polleroutput.txt is created but is empty.
[root@mpc tmp]# ls -l /tmp/polleroutput.txt
TheWitness
Developer
Posts: 17047 Joined: Tue May 14, 2002 5:08 pmLocation: MI, USA
Contact:
Post
by TheWitness Wed Nov 23, 2005 6:49 pm
Provide the full path to PHP in your cron job. Instead of ">>", use ">".
lorell
Posts: 20 Joined: Wed Nov 23, 2005 1:40 pm
Post
by lorell Mon Dec 05, 2005 5:17 pm
Done. Now we play the waiting game!
This is what is output when run from command line as root:
OK u:0.01 s:0.00 r:1.05
I'll upload when crontab runs it as well.
lorell
Posts: 20 Joined: Wed Nov 23, 2005 1:40 pm
Post
by lorell Mon Dec 05, 2005 5:18 pm
crontab posts a completely blank file!
Aargh! Back to the drawing board.
[root@mpc tmp]# ls -l | grep poller
lorell
Posts: 20 Joined: Wed Nov 23, 2005 1:40 pm
Post
by lorell Mon Dec 05, 2005 5:41 pm
Well, as the savvy reader can tell, I created my own permissions problem. After I got that figured out, the polleroutput.txt file was still 0 bytes:
-rw-r--r-- 1 cactiuser cactiuser 0 Dec 5 16:40 polleroutput.txt
Each minute (as per my crontab file) it re-creates a zero byte /tmp/polleroutput.txt file.
lorell
Posts: 20 Joined: Wed Nov 23, 2005 1:40 pm
Post
by lorell Mon Dec 05, 2005 5:43 pm
When I su'ed to cactiuser, and ran the script manually, the /tmp/polleroutput.txt file was created. It contained this:
OK u:0.00 s:0.00 r:1.03
What is this supposed to look like?
lorell
Posts: 20 Joined: Wed Nov 23, 2005 1:40 pm
Post
by lorell Mon Dec 05, 2005 5:45 pm
This is what my line in crontab -u root -e looks like:
*/1 * * * * cactiuser /usr/bin/php /var/www/html/cacti/poller.php > /tmp/polleroutput.txt
The proceeding */1 says to run every minute instead of every five minutes like cacti should run. I did this to decrease the amount of time I have to spend troubleshooting the problem.
lorell
Posts: 20 Joined: Wed Nov 23, 2005 1:40 pm
Post
by lorell Tue Dec 20, 2005 1:51 pm
ping - anyone out there?
gandalf
Developer
Posts: 22383 Joined: Thu Dec 02, 2004 2:46 amLocation: Muenster, Germany
Contact:
Post
by gandalf Tue Dec 20, 2005 1:56 pm
Please set logging level to DEBUG (Settings!). And redirect error output to same file (2>&1)
lorell
Posts: 20 Joined: Wed Nov 23, 2005 1:40 pm
Post
by lorell Thu Dec 29, 2005 4:56 pm
Here's the line in crontab to execute poller.php:
crontab -u root -e
* * * * * cactiuser /usr/bin/php /var/www/html/cacti/poller.php > /tmp/polleroutput.txt
But it does not seem to be running
Every minute it is running (for testing purposes.) Here's the listing of /tmp/polleroutput.txt:
ls -l /tmp/poller*
-rw-r--r-- 1 root root 0 Dec 29 15:53 /tmp/polleroutput.txt
BUT when I run it as root from the command line, I get this:
-rw-r--r-- 1 root root 3911 Dec 29 15:54 polleroutput.txt
and the contents look normal:
# cat polleroutput.txt
For some reason crontab is not executing properly. Right? Thoughts?
gandalf
Developer
Posts: 22383 Joined: Thu Dec 02, 2004 2:46 amLocation: Muenster, Germany
Contact:
Post
by gandalf Fri Dec 30, 2005 10:21 am
lorell wrote: Here's the line in crontab to execute poller.php:
crontab -u root -e
* * * * * cactiuser /usr/bin/php /var/www/html/cacti/poller.php > /tmp/polleroutput.txt
Please have again a precise look at your crontab and compare to mine
Code: Select all
*/5 * * * * cactiuser /usr/bin/php /var/www/html/cacti/poller.php > /var/www/html/cacti/log/poller.log 2>&1
Reinhard
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