[Nagios-db-devel] retention.dat

[Matthew K. <mk...@ma...>]

I've been working on the last bits of my MySQL neb module have just
noticed a rather basic issue for both modules that hasn't cropped up
till now. 

It seems that without the retention.dat file nagios doesn't feed the big
lump of host/service data into the module on startup. Now logically this
makes sense but causes a bit of a problem when there's hostgroup
memberships to insert into the db that depend on those entries getting
loaded at startup. This also messes up adding a host to nagios and
restarting it as again the host won't be in the db until its first
checks are finished breaking the hostgroup data.

As for possible solutions, looping through the lists of hosts and
services in processStart and registering them in the db is a
possibility. But if the retention file already exists your doing twice
the work since nagios will still send all the broker calls, and I'm not
sure of a way to detect this in processStatus to skip those entries. 

Another (and I think better) option would be to submit a patch request
to Ethan to have Nagios stop sending event broker updates when reading
retention.dat and simply have it loop through both host and service
lists after reading it (whether it exists or not) and send all the data
at every startup.

Thoughts? Am I missing something obvious...
-- 
Matthew Kent <mk...@ma...>
http://magoazul.com