Issues with system.run[] command on Zabbix3.2

[vshah]

Hello Folks,

I am trying to get the PID of tomcat process running on all the hosts that we are monitoring

ps -ef | grep tomcat | grep twadmin | awk '{print $2}'
or
ps -ef | grep tomcat | grep twadmin | awk -F ' ' '{print $2}'

These commands return the exact tomcat PID when I execute it on the hosts
When I try to do the same thing using Zabbix, it gives me weird outputs
system.run[ps -ef | grep tomcat | grep twadmin | awk '{print $2}']
o/p --> 20205 25255
The right PID is 25255

It seems like Zabbix is having hard time figuring out using awk
The same issue happening with sed/cut commands as well

Can someone please help out with this
Thanks in advance!!!


-- Vaibhav

[allexpetrov]

Hello Folks,

I am trying to get the PID of tomcat process running on all the hosts that we are monitoring

ps -ef | grep tomcat | grep twadmin | awk '{print $2}'
or
ps -ef | grep tomcat | grep twadmin | awk -F ' ' '{print $2}'

These commands return the exact tomcat PID when I execute it on the hosts
When I try to do the same thing using Zabbix, it gives me weird outputs
system.run[ps -ef | grep tomcat | grep twadmin | awk '{print $2}']
o/p --> 20205 25255
The right PID is 25255

It seems like Zabbix is having hard time figuring out using awk
The same issue happening with sed/cut commands as well

Can someone please help out with this
Thanks in advance!!!


-- Vaibhav

Hi Vailbhav,

it seems like you have printed 2 values.

Could you please show the real output of your command on host ?

Regards,
Alex

[Semiadmin]

Hi, vshah.
Try to use only awk, without grep.
For example, for zabbix-agent (I havn't Tomcat now):
ps -ef |awk '$8 ~/zabbix_agentd/ && $10 ~/zabbix_agentd.conf/ {print $2}'

[jan.garaj]

Your problem is ps -ef | grep tomcat - it greps tomcat process and this grep command as well.

Easy solution:

ps -C "<KEYWORD>" -o pid=

Example and comparison with grep solution:

$ ps -ef | grep sshd
root       1003      1  0 Aug14 ?        00:00:00 /usr/sbin/sshd -D
root      60439   1003  0 08:00 ?        00:00:00 sshd: root@pts/1
root      60628   1003  0 09:03 ?        00:00:00 sshd: root@pts/0
root      60661   1003  0 09:27 ?        00:00:00 sshd: root@notty
root      61446  60631  0 09:53 pts/0    00:00:00 grep --color=auto sshd
$ ps -C "sshd" -o pid=
  1003
 60439
 60628
 60661

See: man ps

[vshah]

Tried all the Inputs - Still Struggling

Hello Guys,

1) I tried using all awk as per Semiadmin:
ps -ef | awk '/tomcat/{print}' | awk '/twadmin/{print}' | awk '{print$2}'
- Still the same problem

2) (i) ps -C tomcat -o pid=
- Doesn't give me anything
(ii) ps -C java -o pid=
- gives me the output with other java processes as well along with tomcat

I just need the tomcat pid (twadmin is the user running it)



Just FYI:
All these commands gives me the correct output when I execute it on the host itself:
ps -ef | awk '/tomcat/{print}' | awk '/twadmin/{print}' | awk '{print$2}'
ps -aux | grep tomcat | grep twadmin | awk '{print $2}'
9353

[Semiadmin]

vshah, I don't suggest to use awk as grep
Try to use it as awk, without pipes:
ps -ef |awk '$8 ~/tomcat/ && $1 ~/twadmin/ {print $2}'

[vshah]

Ohh...My bad

Thanks @semiadmin
I think this works now and I am able to get the PID.

But this is what I am trying to do at the end:
1) system.run[pd=$(ps -ef | awk '$8 ~/java/ && $1 ~/twadmin/ {print $2}') | ls -l /proc/$pd/fd | wc -l]

Error on Zabbix:
ls: cannot access /proc//fd: No such file or directory
0

2) system.run[pid=$(ps -ef | awk '$8 ~/java/ && $1 ~/twadmin/ {print $2}') | cat /proc/$pid/limits | grep "Max open files" | awk '{print $5}']
Error on Zabbix:
cat: /proc//limits: No such file or directory

So this time it's not able to read the value of pid variable