userparameter give wrong value

[tippexer]

Hello,


i have a userparameter which is checking a process on a linux server.
this is the code in my zabbix_agentd.conf

UserParameter=process.xyz,pgrep -lf "xyz" | wc -l

when i run this command as zabbix user on the server i got an 1 and a when i run this command

zabbix_get -s 1.2.3.4 -k process.xyz

on zabbix server i got the result 2

[neogan]

Hmm really strange

Because pgrep catch itself

UserParameter:

UserParameter=pgrep_test,pgrep -lf "apache2" >> /tmp/pgrep

1063 /usr/sbin/apache2 -k start
3174 sh -c pgrep -lf "apache2" >> /tmp/pgrep
6710 /usr/sbin/apache2 -k start
8103 /usr/sbin/apache2 -k start
20359 /usr/sbin/apache2 -k start
28517 /usr/sbin/apache2 -k start
29203 /usr/sbin/apache2 -k start
29964 /usr/sbin/apache2 -k start
30459 /usr/sbin/apache2 -k start
31201 /usr/sbin/apache2 -k start
31319 /usr/sbin/apache2 -k start
31828 /usr/sbin/apache2 -k start

[tippexer]

Hello Neogan,

and why i get the right result ("1") when i run the command manual on the bash?

[neogan]

pgrep -lf "apache"
1063 /usr/sbin/apache2 -k start
25794 /usr/sbin/apache2 -k start
25796 /usr/sbin/apache2 -k start
25829 /usr/sbin/apache2 -k start
26032 /usr/sbin/apache2 -k start
26301 /usr/sbin/apache2 -k start
26447 /usr/sbin/apache2 -k start
26655 /usr/sbin/apache2 -k start
26727 /usr/sbin/apache2 -k start
26729 /usr/sbin/apache2 -k start
26862 /usr/sbin/apache2 -k start
26863 /usr/sbin/apache2 -k start
31828 /usr/sbin/apache2 -k start

another example
sudo pgrep -lf "apache2"
1063 /usr/sbin/apache2 -k start
25794 /usr/sbin/apache2 -k start
25796 /usr/sbin/apache2 -k start
25829 /usr/sbin/apache2 -k start
26032 /usr/sbin/apache2 -k start
26655 /usr/sbin/apache2 -k start
26862 /usr/sbin/apache2 -k start
27093 /usr/sbin/apache2 -k start
27222 /usr/sbin/apache2 -k start
27246 /usr/sbin/apache2 -k start
27306 /usr/sbin/apache2 -k start
27369 /usr/sbin/apache2 -k start
27501 sudo pgrep -lf apache2
31828 /usr/sbin/apache2 -k start

It is pgrep or grep famous bug, it should ignore itself, but with another command it doesn't work


Zabbix_agent as you can see execute pgrep with sh -c prep .... , it +1 process prep

[neogan]

also you can use this:

pgrep -lf "apache2" | grep -v pgrep | wc -l

it will be correct

[tippexer]

Hello Neogan,

I used your command and it works fine. Thanks for your help.

I keep it in my mind

[Colttt]

you dont need pgrep -lf, without that it worked too