Trouble with monitoring services

[rkruck]

I have set up an alert to monitor services in linux (in this case we will use crond).

[Item]
Name: crond status
Type: Zabbix agent
Key: proc.num[crond]
(rest is defalt)

[Trigger]
Name: Cron not running on {HOSTNAME}
Expression: {Custom Linux Templateroc.num[crond].last(0)}<1

Most of my linux servers this works fine on but I have 9 servers which coincidentally are all RHEL 6.5 servers show up as being down, or under the latest data a value of 0. I went to one of the hosts and ran "zabbix_agentd -t proc.num[crond]" and received:
proc.num[crond] [u|1]

I'm lost why it's working on some and not others. I even copied the zabbix_agent.conf file (changing the Hostname= section) from a working server and restarted the agent.

Any help is appreciated.

Robert

[aib]

Do you mind to check if that system has any different daemon like anacron?

https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/ch-Automating_System_Tasks.html

May be because of that the daemon crond didn't start and cannot be checked.

[rkruck]

service status crond shows that it is running. ps -ef|grep cron shows crond running.

[rkruck]

Not sure if this helps any but I set up another alert to monitor auditd and the same 9 servers show it as failed, yet it's running.

"zabbix_agentd -t proc.num[auditd]" and received:
proc.num[auditd] [u|1]

[rkruck]

I found the issue. SELinux is stopping it. I turned it off on my dev/test servers but I need to figure out how to fix it through selinux for our production servers. Unfortunately I know very little about selinux. Has anyone come across this before and may be able to offer assistance.