vmware-dev: No systemd output to console

[zmrow]

Image I'm using:
vmware-dev

What I expected to happen:
Using the vSphere web console to view boot output, I expected to see all kernel and systemd messages.

What actually happened:
I see all kernel output, but nothing from systemd and all of the Bottlerocket boot services. The following is the last message before a login prompt:

<ugly time here> vmxnet3 0000:03:00.0 eth0: NIC Link is up 10000Mbps

How to reproduce the problem:
Boot the vmware-dev variant on VMWare and view output using the web console

[bcressey]

We'll need to add the ability to specify custom kernel command-line arguments in the variant definition, rather than using a fixed console=ttyS0 value everywhere.

[tjkirch]

We'll need to add the ability to specify custom kernel command-line arguments in the variant definition, rather than using a fixed console=ttyS0 value everywhere.

I made #1490 to track this, which I plan to do soon. Then, this issue would hopefully just be adding the console line to the vmware-dev variant definition.

[zmrow]

After doing a little research, it seems like once we get the correct console device figured out, we should be able to forward all of systemd/journald's output to it via:

systemd.log_target=console systemd.journald.forward_to_console=1

The kernel should output to all console devices present.

Resources:

1. https://www.kernel.org/doc/html/v4.14/admin-guide/serial-console.html
2. https://freedesktop.org/wiki/Software/systemd/Debugging/

[tjkirch]

systemd.log_target=console systemd.journald.forward_to_console=1

I think we can get away with just fixing console since we already get the desired behavior on other platforms that have correct console, but it's good to have backup experiments.

[jpculp]

Merged.