Adjusted nagios check_snmp for checking jitter

Products Other Management Solutions
1

This patch will allow checking SNMP version 2c values in Nagios-plugins-1.4:


— check_snmp.c        2005-01-20 18:03:56.000000000 -0700
+++ /root/check_snmp.c  2005-11-15 10:27:33.000000000 -0700
@@ -646,6 +646,10 @@
                asprintf(&proto, DEFAULT_PROTOCOL);
                asprintf(&authpriv, “%s%s”, "-c ", community);
        }
+        else if ( strcmp (proto, “2c”) == 0 ) {
+               asprintf(&proto, “%s”, “2c”);
+               asprintf(&authpriv, “%s%s”, "-c “, community);
+               }
        else if ( strcmp (proto, “3”) == 0 ) {                 /* snmpv3 args /
                asprintf(&proto, “%s”, “3”);

@@ -859,7 +863,7 @@

        / SNMP and Authentication Protocol */
        printf (_(”’
- -P, --protocol=[1|3]‘n’
+ -P, --protocol=[1|2c|3]‘n’
     SNMP protocol version’n’
  -L, --seclevel=[noAuthNoPriv|authNoPriv|authPriv]‘n’
     SNMPv3 securityLevel’n’

I put that in a file called ~/snmp.patch.

To run the patch:
cd /wherever-you-have/nagios-plugins-1.4/plugins/
patch < ~/snmp.patch

Build it:
make check_snmp

and then copy over the old check_snmp command:
cp check_snmp /usr/local/nagios/libexec/

You can test it by running:

/usr/local/nagios/libexec/check_snmp -H AN-IP-ADDRESS -o 1.3.6.1.4.1.161.19.3.2.2.3.0 -w 3 -c 4 -C Canopy -P 2c

where AN-IP-ADDRESS is the IP of an SM and “Canopy” is replaced with your community string. It should return a numeric value. If the value is from 0 to 3 (inclusive) is reports “OK”, if it’s 4 you should get a warning, and if its greater than 4 you should get a critical error message.

Here’s the check command I’m using in checkcommands.cfg for nagios:

# ‘check_jitter’ command definition
define command{
        command_name    check_jitter
        command_line    $USER1$/check_snmp -H $HOSTADDRESS$ -o 1.3.6.1.4.1.161.19.3.2.2.3.0 -w 3 -c 4 -C Canopy -P 2c
        }


And here’s the command as part of a host definition:

define service{
        use                             generic-service
        host_name                       CanopySM-001-005
        service_description             Jitter
        is_volatile                     0
        check_period                    24x7
        max_check_attempts              10
        normal_check_interval           5
        retry_check_interval            5
        contact_groups                  CanopySMAdmins
        notification_interval           120
        notification_period             24x7
        notification_options            c,r
        check_command                   check_jitter
        }


If you have any questions or comments, let me know via email because I rarely check these forums. tpb-canopy at the purple buffalo dot net