snmp-extend to run custom script
From cpwiki.net
1) Create a script/command that monitors something on your system and output the result to stdout.
example
script: /usr/local/bin/check_everything.sh
outputs either...
STATUS: OK - everything good
or
STATUS: NOT OK!
2) Create entry in the SNMP config to monitor the script:
# vi /etc/snmp/userDefinedSettings.conf
add a line...
extend everything_status /bin/sh /usr/local/bin/check_everything.sh
3) restart snmpd
from clish, run "set snmp agent off" then run "set snmp agent on"
4) test it
with a walk
$ snmpwalk -On -v2c -c mycomstring 192.168.1.1 NET-SNMP-EXTEND-MIB::nsExtendObjects .1.3.6.1.4.1.8072.1.3.2.1.0 = INTEGER: 1 .1.3.6.1.4.1.8072.1.3.2.2.1.2.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = STRING: /bin/sh .1.3.6.1.4.1.8072.1.3.2.2.1.3.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = STRING: /usr/local/bin/check_everything.sh .1.3.6.1.4.1.8072.1.3.2.2.1.4.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = STRING: .1.3.6.1.4.1.8072.1.3.2.2.1.5.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = INTEGER: 5 .1.3.6.1.4.1.8072.1.3.2.2.1.6.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = INTEGER: exec(1) .1.3.6.1.4.1.8072.1.3.2.2.1.7.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = INTEGER: run-on-read(1) .1.3.6.1.4.1.8072.1.3.2.2.1.20.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = INTEGER: permanent(4) .1.3.6.1.4.1.8072.1.3.2.2.1.21.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = INTEGER: active(1) .1.3.6.1.4.1.8072.1.3.2.3.1.1.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = STRING: STATUS: OK - everything good .1.3.6.1.4.1.8072.1.3.2.3.1.2.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = STRING: STATUS: OK - everything good .1.3.6.1.4.1.8072.1.3.2.3.1.3.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = INTEGER: 1 .1.3.6.1.4.1.8072.1.3.2.3.1.4.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115 = INTEGER: 0 .1.3.6.1.4.1.8072.1.3.2.4.1.2.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115.1 = STRING: STATUS: OK - everything good
with a get
$ snmpget -v 2c -c mycomstring 192.168.1.1 .1.3.6.1.4.1.8072.1.3.2.4.1.2.15.102.119.112.111.108.105.99.121.95.115.116.97.116.117.115.1 NET-SNMP-EXTEND-MIB::nsExtendOutLine."fwpolicy_status".1 = STRING: STATUS: OK - everything good
