Nagios Support Forum

Posted: **Mon May 08, 2017 2:01 pm**

I added these 3 commands to commands.cfg

define command {
    command_name   SG_URL
    command_line    check_http -H snapgeek.com -S -u https://snapgeek.com/meet-matt/
}

define command {
    command_name   SG_SSL
    command_line    check_http -H 198.54.116.191 -S
}

define command {
    command_name   SG_SSL_CERT
    command_line    check_http -H snapgeek.com -C 365
}

and added this to the host file..

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define service{
        use                             generic-service         ; Name of service template to use
        host_name                       snapgeek.com
        service_description             URL
        check_command                   SG_URL
        notifications_enabled           1
        }

define service{
        use                             generic-service         ; Name of service template to use
        host_name                       snapgeek.com
        service_description             SSL
        check_command                   SG_SSL
        notifications_enabled           1
        }

define service{
        use                             generic-service         ; Name of service template to use
        host_name                       snapgeek.com
        service_description             Cert Age
        check_command                   SG_SSL_CERT
        notifications_enabled           1
        }

but all 3 result in the error

Code: Select all

(No output on stdout) stderr: execvp(check_http, ...) failed. errno is 2: No such file or directory

Posted: **Mon May 08, 2017 2:13 pm**

Try the following: /usr/local/nagios/libexec/check_http -H snapgeek.com -u https://snapgeek.com/meet-matt/

Assuming that works, use that pattern for the others.

I'm assuming libexec because you compiled, but if your plugins are in a different directory you'll need to use whatever directory you used.

Posted: **Mon May 08, 2017 2:26 pm**

dwhitfield wrote:Try the following: /usr/local/nagios/libexec/check_http -H snapgeek.com -u https://snapgeek.com/meet-matt/

Assuming that works, use that pattern for the others.

I'm assuming libexec because you compiled, but if your plugins are in a different directory you'll need to use whatever directory you used.

Returned the following

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# /usr/local/nagios/etc/objects# /usr/local/nagios/libexec/check_http -H snapgeek.com -u https://snapgeek.com/meet-matt/
HTTP OK: HTTP/1.1 301 Moved Permanently - 344 bytes in 0.776 second response time |time=0.775873s;;;0.000000 size=344B;;;0

Posted: **Mon May 08, 2017 2:28 pm**

Looks like it worked. Did you have any other questions?

Posted: **Mon May 08, 2017 2:32 pm**

dwhitfield wrote:Looks like it worked. Did you have any other questions?

Yeah worked by that command but still shows critical error in Nagios

Posted: **Mon May 08, 2017 2:35 pm**

Did you change the command definitions to make what worked from the command line?

For example:

Code: Select all

define command {
    command_name   SG_URL
    command_line    /usr/local/nagios/libexec/check_http -H snapgeek.com -u https://snapgeek.com/meet-matt//
}

Posted: **Mon May 08, 2017 2:52 pm**

dwhitfield wrote:Did you change the command definitions to make what worked from the command line?

For example:
Code: Select all
define command {
    command_name   SG_URL
    command_line    /usr/local/nagios/libexec/check_http -H snapgeek.com -u https://snapgeek.com/meet-matt//
}

Clearly I missed that part. lol. That works for the URL thing.

Though I still have two issues..

I want nagios to visit the site and search for a "keyword" on the site and if it doesn't exist give an error.
The SSL Cert checker doesn't work. When I run the same test command it results in the error "check_http: Invalid option - SSL is not available"

Posted: **Mon May 08, 2017 3:03 pm**

I'm not sure what you are trying to do with the ssl and the string, but it works for me.

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[root@centos6x64 libexec]# ./check_http -H snapgeek.com -s 'yourstring' -S
HTTP CRITICAL: HTTP/1.1 200 OK - string 'yourstring' not found on 'https://snapgeek.com:443/' - 36614 bytes in 1.030 second response time |time=1.030108s;;;0.000000 size=36614B;;;0
[root@centos6x64 libexec]# ./check_http -H snapgeek.com -S
HTTP OK: HTTP/1.1 200 OK - 36614 bytes in 1.027 second response time |time=1.026507s;;;0.000000 size=36614B;;;0
[root@centos6x64 libexec]# ./check_http -H snapgeek.com -s 'Take' -S
HTTP OK: HTTP/1.1 200 OK - 36614 bytes in 2.059 second response time |time=2.059498s;;;0.000000 size=36614B;;;0
[root@centos6x64 libexec]# ./check_http -V
check_http v2.0.3 (nagios-plugins 2.0.3)

Posted: **Mon May 08, 2017 3:15 pm**

This is what I just tried and reproduced the error. part of it I stole from your line above just for fun.

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root@raspberrypi:/usr/local/nagios/etc/objects# /usr/local/nagios/libexec/check_http -V
check_http v2.1.1 (nagios-plugins 2.1.1)

You have a newer version than I have for starters..

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root@raspberrypi:/usr/local/nagios/etc/objects# /usr/local/nagios/libexec/check_http -H snapgeek.com -S
check_http: Invalid option - SSL is not available
Usage:
 check_http -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]
       [-J <client certificate file>] [-K <private key>]
       [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L] [-E] [-a auth]
       [-b proxy_auth] [-f <ok|warning|critcal|follow|sticky|stickyport>]
       [-e <expect>] [-d string] [-s string] [-l] [-r <regex> | -R <case-insensitive regex>]
       [-P string] [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>]
       [-A string] [-k string] [-S <version>] [--sni] [-C <warn_age>[,<crit_age>]]
       [-T <content-type>] [-j method]

Posted: **Mon May 08, 2017 3:36 pm**

Did you also compile the plugins? If so, looks like you may have missed the first step in our instructions apt-get install -y autoconf gcc libc6 libmcrypt-dev make libssl-dev wget bc gawk dc build-essential snmp libnet-snmp-perl gettext (which would include not using our instructions)

The instructions at https://support.nagios.com/kb/article.php?id=515 are for 2.2.0, but you might as well use those if you are going to recompile. You could just recompile check_http, but I don't believe we have pre-written instructions for that. Just ignore the NRPE instructions. The plugin instructions are after those.

If you didn't compile the plugins, I'm not sure if the repos have a way to tell it to use ssl. Probably there's not a way to just uninstall check_http from the repos, so compiling might be the way to go with those too.

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