Nagios Checks to be monitored by checkmk

General
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1

I am currently running Checkmk version 2.2 in our environment. My requirement is to monitor SSL certificate expiration using Nagios checks . I have reviewed the Checkmk documentation provided for nagios at the following link:

Specifically, I need Checkmk to issue a warning when an SSL certificate is set to expire within 30 days. However, when I followed the documentation for integrating Nagios checks in Checkmk under Setup > Services > Other services, I found that it only allows specifying the command line without providing options to set warning or critical thresholds for SSL certificate expiration.

This is for a custom banks certificate that is currently monitored by Nagios, not a standard domain SSL certificate.

Could you provide more detailed instructions on how I can configure Checkmk to achieve this functionality?

2

Hi @rohan,

you can achieve this, by using the check_http plugin. How to configure this, to check the certificate is written on this page:

Regards,
Petra

1 Like
3

I do not understand your sentence.

The ruleset allows you to configure all the options for the command line of the Nagios plugin including thresholds if the plugin supports them.

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4

This topic is temporarily closed for at least 4 hours due to a large number of community flags.

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Hi,

Thanks for the reply

I am still having the issue open in checkmk i configured the Integrate nagios plugin In Setup > Services > Other services Checkmk Inside command line i use the path /usr/lib/nagios/plugins/check_ssl_certificate given the full path where SSL certificate is installed and also save and activate the changes but when i check this checks inside the host i get service state unknown and doesn’t show any error.Any other thoughts how to configured this in checkmk as i am still stuck here.

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You need to add all relevant command line arguments after /usr/lib/nagios/plugins/check_ssl_certificate in that rule.

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Hi,

Thanks for the reply I already added the add all relevant command line arguments after /usr/lib/nagios/plugins/check_ssl_certificate in that rule and once saved i get the error state unknown.

Where else we can troubleshoot further in this case ?

9

Run the Nagios plugin as site user.

10

Hi,

How to run that Nagios plugin as site user in checkmk i never tried it before.

Are there any steps for it to follow ?

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at location /etc/checkmk/ create file mrpe.cfg
in it you put you line like example:

ping_X /etc/check_mk/check_ping -H 10.10.10.10 -w 10,2% -c 20,5%

service discovery show new check “ping_X”

documentation
https://docs.checkmk.com/latest/en/agent_linux.html#e2e_monitoring

1 Like
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On the monitoring server run omd su SITENAME and then execute the Nagios plugin with its argument.

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In my case the nagios plugin and the command i am running /usr/lib/nagios/plugins/check_ssl_certificate is on another server and checkmk monitoring server is on different server so where should i run the command run omd su SITENAME and then execute the Nagios plugin with its argument .

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If the Nagios plugin is not on the monitoring server then run it where it is installed.

@Karczoszki already showed the MRPE configuration needed for the agent to start the Nagios plugin.

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If i understood correctly now i need to create /etc/check_mk/mrpe.cfg on server where that nagios plugin is installed and there put the nagios relevant command line arguments /usr/lib/nagios/plugins/check_ssl_certificate -w 30 -c 15
and any other configuration i need to do in checkmk web interface so that checkmk can read data from this configuration /etc/check_mk/mrpe.cfg ?
and also should i remove that rule set Integrate Nagios plugins In Setup > Services > Other services Checkmk offers the special rule set Integrate Nagios plugins
as it was previous configuration as with this configuration i am getting error unknown.

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Yes, as the Nagios plugin is not on the monitoring server.

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@ Karczoszki and Sander I am really thankful for you guys always been there to help quickly, now nagios SSL cert plugin works fine in checkmk and i am able to monitor that in checkmk.

Thanks,
Rohan

18

Can you please mark the answer as the solution if it solved your problem?

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