libjuju support for Cross Model Relations

[Ed Stewart]

Post discussions with Tim V and Tim P, we understand that Cross Model Relations are not supported within the Python Juju libraries.

This is a feature request to support CMR functionality within the Juju Python libraries. Priority would be on allowing CMRs to be *consumed*; lower priority to allow them to be offered.

If sample code can be provided to do this directly on the API facades until this feature is implemented as a managed object, that would be much appreciated,

[Tim Van Steenburgh (tvansteenburgh)]

@thumper Will your team do this or do you want help from Cory?

[Ed Stewart (emcs2)]

Whilst we wait for this to be fully provided by libjuju, would it be possible to get any sample code for how we can do it using the straight API facades?

[Richard Harding (rharding)]

This is actively being worked on as Juju works this cycle to bring CMR relations and URL to bundles. As work there progresses we'll also be adding CMR support to libjuju for both individual charms as well as supporting the new bundle expressions.

That work has been started and is currently ongoing and we expect over the coming weeks to have edge snaps to test and play with with the hopes that a future 2.6 point release will have the bundle improvements in play. The library will be updated toward the end of this chunk of work.

[Richard Harding (rharding)]

This is now released as part of the 2.6.0 release of python-libjuju. You can see the release announcement here.

https://discourse.jujucharms.com/t/pylibjuju-2-6-0-release-notes/1926

[Anastasia (anastasia-macmood)]

2.6.7 release never went out. This fix was instead released in 2.6.8 - re-targeting this report.