Swift middleware subordinate charms?

[James Page]

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On 24/09/14 12:09, Andrew Wilkins wrote:
> 
> Anyway, normally I think you'd want the primary charm's 
> (swift-proxy's) relevant relation-changed hook to do the restart 
> itself when the middleware changes (ie. when middleware-changed is 
> triggered). This just makes sure that the responsibility and
> knowledge of restarts stays within the charm responsible for the
> service.
> 
> 
> That makes sense. I was coming from the angle of how to do this
> without touching any existing charms, which is wrong.
> 
> I think to do this right I'd need to modify the swift-proxy and 
> swift-storage charms, and have them modify their configuration
> files rather than having the subordinate do it. The subordinate
> would effectively just provide configuration parameters and install
> the middleware dependencies. I'll hack around for now, and maybe
> I'll propose something later if anything becomes of my charm.

That sounds like the best approach - we did something similar for
cinder backends - see the cinder and cinder-ceph or cinder-vmware charms.


- -- 
James Page
Ubuntu and Debian Developer
james.page at ubuntu.com
jamespage at debian.org
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