network_get() missing information

[james beedy]

Network_get() only returns a subset of the information.

Pretty sure I'm only seeing this on the `localhost` provider.

See https://paste.ubuntu.com/p/C2pcpwWW5G/

To replicate, using the localhost provider run:

juju deploy kubernetes-core
juju run --application kubernetes-worker "network-get cni"

[John A Meinel (jameinel)]

This seems like the Machiner isn't properly inventorying the network interfaces when bootstrapping with LXD. Which seems surprising, and seems worth investigating.

[Joseph Phillips (manadart)]

Looks like the machiner is populating link-layer devices correctly.
It is particular to `network-get` for the LXD provider.

Investigation ongoing.

[Joseph Phillips (manadart)]

This will occur for providers that do not support subnet discovery.

Subnet discovery works on these providers:
- gce
- ec2
- maas
- openstack
- oci
- oracle (to be deprecated)

We will see this on the others.

We are currently in the midst of significant work on the Juju networking model where we intend to make the networking experience consistent across providers, including mutable spaces for all. This will be rectified as part of that work.

[Joseph Phillips (manadart)]

https://github.com/juju/juju/pull/11241