Setup Nagios check_clamd

Question

I'm getting a (No output returned from plugin) from a host and cannot understand why:

Service on monitor server:

# Check Clamd availability
define service {
    hostgroup_name                  clamd-servers
    service_description             ClamAV Daemon
    check_command                   check_nrpe!check_clamd
    use                             generic-service
    notification_interval           0 ; set > 0 if you want to be renotified
}

Hosts on monitor:

# Clamd Servers
define hostgroup {
        hostgroup_name  clamd-servers
        alias           ClamAV servers
        members         fsmvps
        }

nrpe_local.fcfg on host fsmvps

command[check_clamd]=/usr/lib/nagios/plugins/check_clamd -H /var/run/clamav/clamd.ctl

Running the command /usr/lib/nagios/plugins/check_clamd -H /var/run/clamav/clamd.ctl on the host will produce the following output as clam is up and running:

CLAMD OK - 0.000 second response time on socket /var/run/clamav/clamd.ctl [PONG]|time=0.000219s;;;0.000000;10.000000

Clueless at the moment as to why no output is returned as I'm a beginner on Nagios.

When you run the command from the Nagios server, what is the response? — Jim Black, Mar 16 '17 at 16:15
Hi Thanks. Managed to solve by changing clamav to run on TCP port 3310 and calling the check_clamd command directly. Should I add this as an answer? — Fabrizio Mazzoni, Mar 17 '17 at 04:24

score 0 · Answer 1 · answered Jan 26 '18 at 10:25

Perhaps your NRPE service wasn't setup right (sometimes it complains about ssl).

Running (as the nagios user) on your monitor server something like :

/usr/lib/nagios/plugins/check_nrpe -H fsmvps check_clamd

Might help diagnose things.

It might be :

Permissions (can the nagios user on fsmvps read /var/run/clamav/clamd.ctl)
check_nrpe needs the -n flag or a different port.
you've not restarted nrpe on the fsmvps server after editing it's config.

Setup Nagios check_clamd

1 Answers1