Add macvtap support

Hey everbody,

as @NerdsvilleCEO mentioned in #81, there is no support for using host devices (e.g through macvtap) in the nets section. This would be a really nice feature.

@karmab - I saw your talk at FOSDEM 2019. kcli is awesome, love it!

Cheers

[karmab]

to give it a try, i’ve added some preliminary support for macvtap in https://github.com/karmab/kcli/commit/3c9c7b1f510c4ff9acc45ecdb87c9201eb7c3d3b

my understanding is that you only need to create a macvtap network in libvirt on top of a specified nic, and then use it as a regular network. so latest commit adds the ability to create a macvtap network with the following invocation

kcli create network -P macvtap=true -P nic=eth0 my_net

you can then use this network when creating a vm, for instance, with a oneliner like

kcli create vm -i centos7 -P nets=[my_net]

i havent fully tested it (but i will) and will think how to improve end user experience for this case.

[karmab]

technically, the way i give vms a “public” ip is simply by

• setting a bridge on top of the default interface of your hypervisor (in my case, it’s generally a wired connection).
• using this network in kcli (which will be reported in kcli list network)

In this configuration, qemu-guest-agent will actually take care of reporting the ip used by the vm, so you can still kcli ssh to it