WL: add support for distro-specific bcfg2/Packages/config.xml files

[https://www.google.com/accounts/o8/id?id=AItOawmSAqcanZjC_zUMz6-24nRYFLJWSQtV0vw]

Currently, we have both ubuntu and centos packages defined in bcfg2/Packages/config.xml. This causes ubuntu to download all the ubuntu and centos files, greatly increasing the time it takes to initialize the bcfg2-server. Desired solutions would be to have distro-specific files or have bcfg2 recognize what repo files to download.

[desai]

I'm not entirely sure I follow. Do you want the server to demand load the files based on which clients connect to that server? If the sources are in the config, i think the server will definitely need all of the data, right?

[https://www.google.com/accounts/o8/id?id=AItOawmSAqcanZjC_zUMz6-24nRYFLJWSQtV0vw]

Well. in our case, we're not using a centralized bcfg2-server - each client has it's own server (on the same system as the client). But we're only using one set of bcfg2 configs for all supported distributions.

Is there a way in this case to load only the needed repository data?

[desai]

The big problem here is that you have both of your servers setup to be able to serve configurations for all clients. There isn't a way for the server to know a priori if it will need to serve data to a client in a given group. I don't think there is any way we can robustly accomplish what you're suggesting here.

I'd suggest an alternative approach, where you use a distributed versioning system that can cherrypick changes for different server types.