Just to confirm the implementation to support the extra bindings has started and should be available for early testing tomorrow, in the maas-spaces2 feature branch.
Cheers, Dimiter On 1.03.2016 11:24, John Meinel wrote: > As we discussed how the Juju network model was going to map network > spaces into IP addresses for charms, the Openstack charmers noted that > it wasn't sufficient to just provide networking configuration for > existing relations. There were several places where the Openstack charms > needed a way to expose a workload onto the network, but whose > configuration information was already well handled by the existing > relations. They liked being able to move the mapping of subnets,etc from > being just config in a charm into being pieces that system operators > could map at deploy time. > > The best solution that we've come up with is to add a new section to > charm metadata.yaml. At a similar level to provides/requires/tags we'd > add a field for "extra-bindings". Entries in this list end up being > available for "juju deploy charm --bind <binding>=<net-space>", but > don't have the same set of charm hooks that will be fired for their > lifecycle. > > We're pretty happy with what we've come up with after a fair amount of > trying out different possibilities. We'd like to open it up to a bit > wider discussion in case there are use cases that we didn't realize we > missed. (We certainly know about a few cases that we are intentionally > not supporting with this, in an effort to preserve compatibility and > simplicity.) > > If you're interested in this space, let us know what you think, > Juju Extra Network Bindings < > https://docs.google.com/document/d/1pKORpWSitOk7C_HMNBaO36-Ht1b3lT86bOWTy9jPMDQ/edit?usp=sharing> > > Thanks, > John > =:-> > > PS> For James Page and other's that have already looked at this > document, can you give it a once over. I pulled out some of the > alternatives to make it more focused, and want to make sure that I > haven't lost cohesion in the final draft. > > -- Dimiter Naydenov <[email protected]> Juju Core Sapphire team <http://juju.ubuntu.com>
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