Poller does not run scripts

[tata_tulen]

Hi all,
I've problem with my scripts. I can run them manually with correct results, however poller seems to not run them - one of that script is customized ping script and in intermediate firewall log I can see packets generated by the script with manual run, but I can't see any periodically repeated packet that shoud be generated by the script with poller run...

In the cacti log I can see something like this:

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11/10/2011 02:44:02 PM - SPINE: Poller[0] Host[37] DS[674] WARNING: Result from SCRIPT not valid. Partial Result: ...
11/10/2011 02:44:02 PM - SPINE: Poller[0] Host[37] DS[673] SCRIPT: perl /var/www/cacti/scripts.ping2.pl 192.168.254.10, output: U 

What could be wrong?

Thanks!

[noname]

Can your poller user (e.g. cactiuser) execute your script?
(permissions, pathname, etc. for all commands you're using)

[tata_tulen]

Yes, I've created new scheduled command in cron - and the script can run.

[tata_tulen]

I've turn on the DEVELOP level of logging and there is something I do not understand:

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11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] DEBUG: HOST COMPLETE: About to Exit Host Polling Thread Function
11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] DS[674] SCRIPT: perl /var/www/cacti/scripts/ping.pl 192.168.254.10, output: U
11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] DS[674] WARNING: Result from SCRIPT not valid. Partial Result: ...
11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] ERROR: Empty result [192.168.254.10]: 'perl /var/www/cacti/scripts/ping.pl 192.168.254.10'
11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] DEBUG: The POPEN returned the following File Descriptor 9
11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] DS[673] SCRIPT: perl /var/www/cacti/scripts.ping2.pl 192.168.254.10, output: U
11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] DS[673] WARNING: Result from SCRIPT not valid. Partial Result: ...
11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] ERROR: Empty result [192.168.254.10]: 'perl /var/www/cacti/scripts.ping2.pl 192.168.254.10'
11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] DEBUG: The POPEN returned the following File Descriptor 9

How can the result of script be empty? Manual run returns a value, so as cron job (I controled it in Webmin)...

I'm not as good in linux as I'd like to be, so that I do not know all possibilities of this behaviour.

[noname]

Code: Select all

11/11/2011 08:36:02 AM - SPINE: Poller[0] Host[37] DS[674] WARNING: Result from SCRIPT not valid. Partial Result: ...

Did you use multiple 'print' statement in your script? (Or did you add a newline to output?)
- Making Your Scripts Work With Cacti - Cacti Docs

Note: Spine requires, that multiple parameters are spit out by a single “print” statement. Do not print them in a loop!

[tata_tulen]

I'm testing it on this script:

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#!/usr/bin/perl

# take care for tcp:hostname or TCP:ip@
$host = $ARGV[0];
$host =~ s/tcp:/$1/gis;

open(PROCESS, "echo \"oops\" > /tmp/oops.txt |");
close(PROCESS);
open(PROCESS, "ping -c 1 $host |");
close(PROCESS);
open(PROCESS, "ping -c 5 $host | grep rtt |");
$ping = <PROCESS>;
close(PROCESS);
$ping =~ m/(rtt min\/avg\/max\/mdev = )(.*)\/(.*)\/(.*)\/(.*) (ms|usec)/;

if ($6 eq "usec") {
        print $3/1000;  # re-calculate in units of "ms"
}else{
        print $3;
}

As I understand your link, it should be ok. Anyway, it make me to try cmd.php poller and BINGO! That's ok. Many thanks!

However I'd like to use spine, I've occasional troubles with CPU utilization with cmd.php poller. What can be wrong with the script above?

[tata_tulen]

Damned, I'm sorry for editting the post. The problem is really in using spine. I've notices a typo in Data Input Method for the custom script - and it works with cmd.php (as the "deafult" ping script does), however no script does work with spine...

[noname]

>> it works with cmd.php (as the "deafult" ping script does), however no script does work with spine...

Nothing?! That's odd..
Is there any error in Cacti's log?
Or what results is shown when you performed as follows:

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./spine --verbosity=5

See also: Debugging - Check Cacti's Poller

[tata_tulen]

I do not know, how to redirect stdout from spine command (using '>' or '| tee' does not work), however with DEVEL log level I can see just some error I've already posted:

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11/11/2011 12:03:01 PM - SPINE: Poller[0] Host[37] DS[673] SCRIPT: perl /var/www/cacti/scripts/ping2.pl 192.168.254.10, output: U
11/11/2011 12:03:01 PM - SPINE: Poller[0] Host[37] DS[673] WARNING: Result from SCRIPT not valid. Partial Result: ...
11/11/2011 12:03:01 PM - SPINE: Poller[0] Host[37] ERROR: Empty result [192.168.254.10]: 'perl /var/www/cacti/scripts/ping2.pl 192.168.254.10'
11/11/2011 12:03:01 PM - SPINE: Poller[0] Host[37] DEBUG: The POPEN returned the following File Descriptor 16 

However I've noticed there is one .sh script and it's working. Well, spine seems to have some problem with perl...

[TheWitness]

Run it as the poller user from the command line using "./spine -R -V 3". Also, we specifically ask you to use the full path to 'perl' in your data input methods. This is due to the fact that we do not pass the users environment to the scripts. This is done to increase performance and reduce load. Make sure that when you are done, that the poller cache contains the entire path to perl.

So, if you follow the rules, generally things work just fine.

TheWitness

[tata_tulen]

Hi, sorry for long response time.

I modified the Data Input Methods to use full perl path, but this didn't helped.

Run it as the poller user from the command line using "./spine -R -V 3".

Please, could you guide me? I'm not "linux-aware", I'm just 'advanced user'. I do not know the 'www-data' user password so I cannot log in as that user... I can run cron job as that user, however I do not know how to redirect the output of spine command to the file (as I wrote, the ways I know - " > file.txt" and "| tee file.txt" don't work)...

Thanks for help!

[TheWitness]

Use th "-S" flag to get output to standard output.

[tata_tulen]

I'm sorry for very log time response, I've been out of office...

See the result of 'spine -S -R -V 3 > spine.txt' command in attachement. It seems as all is ok, however the perl script don't work with spine poller...

[TheWitness]

They worked in this output. What is the difference?

[tata_tulen]

I just realize I run the script as root, not as www-data - I've created the cron job with run as www-data and the result is different - in spine.txt there is the same errors as in cacti log with spine as poller.

Well, it's permission problem, am I right?

May be this is significant - when I run the cron job, I get this warnings:

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Insecure $ENV{PATH} while running setuid at /var/www/cacti/scripts/linux_memory.pl line 3.
Insecure $ENV{PATH} while running setuid at /var/www/cacti/scripts/linux_memory.pl line 3.
Insecure $ENV{PATH} while running setuid at /var/www/cacti/scripts/loadavg_multi.pl line 4.
Insecure $ENV{PATH} while running setuid at /var/www/cacti/scripts/unix_users.pl line 8.
Insecure $ENV{PATH} while running setgid at /var/www/cacti/scripts/ping.pl line 7.
Insecure $ENV{PATH} while running setgid at /var/www/cacti/scripts/ping3.pl line 7.
Insecure $ENV{PATH} while running setuid at /var/www/cacti/scripts/ping3.pl line 7.
Insecure $ENV{PATH} while running setgid at /var/www/cacti/scripts/ping2.pl line 7.
Insecure $ENV{PATH} while running setgid at /var/www/cacti/scripts/ping3.pl line 7.