[Ganglia-developers] Auto configuration ideas

[<Dan...@ba...>]

I've been looking at how we currently deploy Ganglia configuration files
in our organisation, and whether the process can be improved.

Is anyone already working on any aspect of this issue:

- server based configuration (e.g. from a HTTP server or LDAP server)
instead of from a flat file

- remotely signaling a subset of gmond nodes to re-read the
configuration or restart themselves, possibly by sending a notification
over the multicast channel

- allowing a central configuration server to override some, but not all,
of the values specified in the config file

One issue that concerns me is the possibility of all nodes starting up
together and overloading the configuration server with requests -
whatever scheme was used would have to be able to deal with this
scalability issue in a sensible way.

A simple solution might just involve a cron job polling a HTTP server -
however, large sites would find this extremely wasteful of resources,
because there wouldn't always be a new configuration file available
every time the HTTP server is polled.

Regards,

Daniel
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