Checks shipped by nrpe charm not exported

[Haw Loeung]

NRPE charm checks, for example check_conntrack, are not exported in /var/lib/nagios/export and are not monitored by default.

We should look into fixing this.

[Diko Parvanov (dparv)]

The requested functionality is not a charmed way of connecting nagios and nrpe units.

NRPE units should do assumptions on the nagios unit (for example check_nrpe executable path) and duplicate command definitions for each check.

[Haw Loeung (hloeung)]

What do you mean? Any charms using charmhelper.contrib.charmsupport.nrpe drops files in /var/lib/nagios/export for a nagios host to collect.

The file there has nothing about path of check_nrpe but rather looks like this:

| #---------------------------------------------------
| # This file is Juju managed
| #---------------------------------------------------
| define service {
| use active-service
| host_name host
| service_description Verify canonical-livepatch is working
| check_command check_nrpe!check_canonical-livepatch
| servicegroups livepatch
| }

See charmhelpers code:

https://github.com/juju/charm-helpers/blob/master/charmhelpers/contrib/charmsupport/nrpe.py#L129
https://github.com/juju/charm-helpers/blob/master/charmhelpers/contrib/charmsupport/nrpe.py#L215

[Xav Paice (xavpaice)]

The functionality referred to here is the 'other' way of getting NRPE checks to Nagios, via rsync rather than relation. Although it's an older method, there are use cases still for it, and we need to continue to support it.

Next step is to review the behavior and determine which checks are missing from /var/lib/nagios/export, and figure out why.

[Andrea Ieri (aieri)]

Reprioritizing this bug to low given that the COS Lite is now in GA