Nagios Regex exclusion

[mickp]

I have some hosts - they are being included in a group by regex.

The group includes some db hosts, which I don't want to see.

Take these hostnames as examples:

mickp1env1-app1-1-dc1
mickp1env1-apache1-1-dc1
mickp1-db1-1-dc1
mickp1env1-apache2-1-dc1


My group is defined as follows:

Code: Select all

define hostgroup{
        hostgroup_name  mickp1
        alias           All mickp1 hosts
       members          mickp1.*
}

However, I don't want to see the db hosts in this group - it's for another team and they don't care about db hosts.

So, using regexr.com, I pasted the above hostnames into the free text box, then in the top I used this expression:

mickp1(?!-db).*

And it works, it finds everything except the db host.


However, when I replace mickp1.* with this in the hostgroups file, it fails. I get this error:

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Error: Could not expand members specified in hostgroup (config file '/etc/nagios/hosts/hostgroups.cfg', starting on line 231)
   Error processing object config files!

I have also tried the a positive lookup, so find them all - but not the db hosts:

members mickp1.*, !mickp1(?-db).*

This does not generate any error - and nagios reloads fine, but it still does not exclude.


I have tried this with with these settings:

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1. use_regexp_matching=1, use_true_regexp_matching=0
2. use_regexp_matching=1, use_true_regexp_matching=1
3. use_regexp_matching=0, use_true_regexp_matching=1

Nothing works.

Anyone got any ideas on what I'm doing wrong? Is it as basic as the exclusion from a group has to be another group name and not another rexgex? Or that in my first example, Nagios prefers to find rather than exclude?

Please help.....

Mick.

[dwhitfield]

Can you post /etc/nagios/hosts/hostgroups.cfg?