In case the domain hits an err() or something similar early in the execution, xl create -c domain_config does not display anything useful. I assume the same applies to running the guest via rumprun -i.
It's probably a Xen tool race condition, although I'm not 100% sure.
The purpose of this issue is mostly to remind us that in case we want really short-lived guests in a production case some day, at least the console cannot be relied on.
In case the domain hits an err() or something similar early in the execution,
xl create -c domain_configdoes not display anything useful. I assume the same applies to running the guest viarumprun -i.It's probably a Xen tool race condition, although I'm not 100% sure.
As a workaround, I added a sleep(1) along the exit(error) path: https://github.com/rumpkernel/rumprun-xen/commit/9bc666a119cb52fdf1cc2c0afc163f18d9d7b616
The purpose of this issue is mostly to remind us that in case we want really short-lived guests in a production case some day, at least the console cannot be relied on.