Nagios plugin for checking Squid

I once needed a way to make sure our Squid proxy cluster operates correctly. So I wrote a rather simple Squid check plugin for the Nagios monitoring software. André Moura has pimped it further. Feel free to use it. It’s also available from monitoringexchange.org.

17 thoughts on “Nagios plugin for checking Squid”

  1. Anonymous

     

    Hi,

    As you can see I tried many known and unknown URLs, but never received the correct responce. Very odd.

    root@ABC-1234:/usr/local/nagios/libexec# ./check_squid.pl -u http://www.klunky.co.uk -p fredprox -l 8080 -e200
    CRITICAL – Status: 406 Not Acceptable (but expected 200…)
    root@ABC-1234:/usr/local/nagios/libexec# ./check_squid.pl -u http://www.klunky.co.uk/ -p fredprox -l 8080 -e200
    CRITICAL – Status: 406 Not Acceptable (but expected 200…)
    root@ABC-1234:/usr/local/nagios/libexec# ./check_squid.pl -url=http://www.klunky.co.uk/ -p fredprox -l 8080 -e200
    CRITICAL – Status: 400 URL must be absolute (but expected 200…)
    root@ABC-1234:/usr/local/nagios/libexec# ./check_squid.pl -url=http://www.google.com -p fredprox -l 8080 -e200
    CRITICAL – Status: 400 URL must be absolute (but expected 200…)
    root@ABC-1234:/usr/local/nagios/libexec# ./check_squid.pl -url=http://www.google.com/ -p fredprox -l 8080 -e200
    CRITICAL – Status: 400 URL must be absolute (but expected 200…)
    root@ABC-1234:/usr/local/nagios/libexec# ./check_squid.pl -url=http://www.google.com/index.html -p fredprox -l 8080 -e200
    CRITICAL – Status: 400 URL must be absolute (but expected 200…)
      root@ABC-1234:/usr/local/nagios/libexec#./check_squid.pl -url=http://www.simonloewen.com/ -p fredprox-l 8080 -e200
    CRITICAL – Status: 400 URL must be absolute (but expected 200…)

    root@ABC-1234:/usr/local/nagios/libexec#./check_squid.pl -u http://www.simonloewen.com/ -p fredprox-l 8080 -e200
     CRITICAL – Status: 406 Not Acceptable (but expected 200…)

     

    Best regards, me

     

    Reply
    1. Anonymous

      Your problem is that you give the last parameter wrong. It is "-e 200" not "-e200" (although -h says so).

      Example:

      check_squid.pl -u http://yahoo.com -p proxy.server.com -l 3128 -e 200

      Good luck!

      Reply
      1. Anonymous

        Hey there,

        thanks for the nice plugin, its definitely helpful.

        My Problem is, that if i let Nagios execute the check it always returns (null).

        I run it as user nagios manualy and had success:

        ./check_squid.pl -u http://www.google.com -p srvproxy -l 3128 -o USER -m PASS -e 200

        OK – Status: 200 OK

         

        But when i created a service and the command ( i hardcoded everything to eleminate the cause of defect) i just get (null) as result.

         

        define service{
                use                             generic-service                  ; Name of service template to use
                host_name                       srvproxy
                service_description             Squid Service
                check_command                   check_squid
                }

         

        # 'check_squid' command definition
        define command{
                command_name    check_squid
                command_line    $USER1$/check_squid.pl -u http://www.google.com -p srvproxy -l 3128 -o USER -m PASS -e 200
        }

        Is there any known issues ?

        Reply
          2. Anonymous

            I founded the problem..

            in the line use lib, the path is another for me..

            its OK now..

            thankss

          4. Anonymous

            hello

            In my case , NAGIOS PLUGINS PATH in resource.cfg “/usr/local/nagios/libexec”
            and placed check_squid.pl there.
            On the other hand USE LIB PATH in check_squid.pl is “/usr/lib/nagios/plugins”.
            replace USE LIB PATH in check_squid.pl to “/usr/local/nagios/libexec” and restart nagios.
            Is it ok?

        2. Anonymous

          You need install perl-modules

           

          perl -MCPAN -e shell
           
          cpan> install  HTTP::Request::Common
           
          cpan> install  LWP::UserAgent
           
          cpan> install  HTTP::Headers

           

          Reply
          1. Anonymous

            AND need change:

             

             19 #use lib "/usr/lib/nagios/plugins";
             20 use lib "/usr/local/nagios/libexec";
        3. HST

          Hello!
          Same thing here, works from a prompt but does nnot work from within nagios.
          YES, I already checked the lib path and YES I also have utils.pm in the same directory. Matter of fact I have both utils.pm as well as util.sh in the same directory /usr/local/nagios/libexec.
          Hmm, I am lost!

          Reply
  2. Anonymous

    Hi,

     

    I'm trying to use this script to check if squid authentification it's working fine. My SQUID is using ntlm authentification.

    # /usr/lib/nagios/plugins/check_squid.pl -u http://www.google.com -p 10.0.0.20 -l 3128 -e 200 -o test1 -m dunhill
    CRITICAL – Status: 407 Proxy Authentication Required (but expected 200…)

    Reply
      1. Anonymous

        Seems so

         

        use output from the –version option of the plugin itself).
        root@SV:/usr/local/nagios/libexec# ./check_squid.pl  -u http://www.google.de -p 10.0.0.13 -l 3128 -e 200
        OK – Status: 200 OK
        root@SV:/usr/local/nagios/libexec# ./check_squid.pl  -u https://www.google.de -p 10.0.0.13 -l 3128 -e 200
        OK – Status: 200 OK
         

        Reply

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