Enable serial console in libvirt images

[seitzbg]

Describe the Enhancement

Obtain output from virsh console.

Describe the Need

I want to be able to log in via console to the domain to debug issues when the domain cannot obtain an IP address

Current Alternative

No

Can We Help You Implement This

Should be easy enough to add a serial console startup via systemd or such?

[Stromweld]

for libvirt it's using qemu under the hood. Is there a vnc session available?

[HillBright]

Maybe vnc is available, but I believe it's still better if serial console is available, so vnc is NOT required. Purely using terminal to do things sometimes is wanted.

[Stromweld]

Is the desire here to add serial console support during the packer build or to the final bento/<os_name> box published to vagrant cloud?