[qemu/platform] Add plumbing for getting networks

[townsend2010]

No description provided.

[codecov]

Codecov Report

Merging #2462 (852d547) into main (9056c2c) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #2462   +/-   ##
=======================================
  Coverage   85.18%   85.18%           
=======================================
  Files         207      207           
  Lines       10433    10437    +4     
=======================================
+ Hits         8887     8891    +4     
  Misses       1546     1546           

Impacted Files	Coverage Δ
src/platform/backends/qemu/qemu_platform.h	100.00% <100.00%> (ø)
...orm/backends/qemu/qemu_virtual_machine_factory.cpp	83.78% <100.00%> (+0.92%)	⬆️

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[Saviq]

@Saviq ok. so can confirm the current 1.9 dev build isn't ready for this yet. Attempting to start a "simple" instance using

multipass launch --network en11 --name networktest

results in a timeout, the VM being set to an Unknown status, and appears to take down the multipassd service, as subsequent attempts cannot connect to the multipass socket.

I also noticed that my driver is set to qemu, and that it says invalid driver when I try change it to hyperkit.

Originally posted by @mlb5000 in #1857 (comment)

[townsend2010]

Hey @mlb5000,

Are you using an M1 or an Intel Mac? What version of macOS do you have?

Thanks!

[Saviq]

@mlb5000 that timeout we just found, yes (it wasn't timing out before, I promise you). We're digging into it. hyperkit's only available on Intel CPUs, FWIW.

[mlb5000]

@townsend2010 ya I'm on an M1 on Big Sur 11.5.1.

@Saviq oh that's interesting. For some reason I was under the impression that qemu was exclusively meant for emulating Intel, that's my misunderstanding. Will it also run native ARM images if they are available? And no worries, I installed an edge build, so that's to be expected! Just want to make sure I understand the progress/direction of things as it relates to M1 so I can determine when that platform may be economical to bring into my K8S capacity :).

[Saviq]

@mlb5000

Will it also run native ARM images if they are available?

That's the only thing Multipass does today, native VMs - we're thinking of cross-arch workloads (#886) but are not there yet.

I installed an edge build, so that's to be expected

We identified the issue (it actually affects Parallels on the M1, too - https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1964471) and we have a fix incoming.

[Saviq]

Looks good. Can't bors until #2501 lands, though.

[Saviq]

bors merge

[bors]

Build succeeded:

• CI (Linux, linux, lxd)
• CI (Linux, linux, qemu)
• CI (macOS, macos-10.14, hyperkit, x86_64)
• CI (macOS, macos-10.15, hyperkit, x86_64)
• CI (macOS, macos-10.15, qemu, x86_64)
• CI (macOS, macos-11, hyperkit, x86_64)
• CI (macOS, macos-11, qemu, x86_64)
• CI (macOS, qemu, arm64)
• CI (Windows, windows-10, hyperv)
• CI (Windows, windows-11, hyperv)
• Linux
• macOS-arm64
• macOS-x86_64
• Windows