Monitoring shared filesystems

[Kumar, Ashish]

Dear fellow Nagios users,

We have a bunch of servers on which we have shared filesystems.  The
filesystem actually resides on the SAN storage and are connected to
physical servers.  Let's say /home is shared among server1 and server2.
When /home breaches the WARNING or CRITICAL threshold it raises two
tickets, one from each server.

I tried utilising the check_cluster and check_cluster2 plugins to raise
only one ticket when there is a problem instead of two.

I have the following definitions...

"Disk Monitor /home" is being monitored on server1 and server2 using NRPE
with notifications disabled.

hostgroups
==========

define hostgroup {
        hostgroup_name                 clustered_servers
        alias                          Clustered servers
        members                        server1,server2
        }



servicecluster.cfg
==================
define service {
        service_description             Clustered disk /home
        hostgroup_name                  clustered_servers
        check_command
check_cluster_service2!$SERVICESTATEID:server1:Disk Monitor
/home$,$SERVICESTATEID:server2:Disk Monitor /home$
        max_check_attempts              3
        check_interval                  2
        retry_interval                  1
        notification_interval           15
        contacts                        sysadms
        register                        1
        }


It seems when the hostgroup_name expands internally in Nagios it creates
two service checks in both the servers so it is understood that there will
be two alerts.  What changes can I make to raise only one ticket?  In
certain cases we have around 10 servers with shared filesystems, so you can
understand the havoc it creates.

Please let me know if you have any questions.

Thanks,
Ashish
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