log errors only instead of keeping everything quiet
Rely on loglevel and configure systemd to only log important messages (error/warning when the boot is significantly delayed or impossible).
Since loglevel is configurable and defaults to 4, only error messages are reported by the kernel. Setting ShowStatus=auto should prevent headscratching moments on simple problems without impacting verbosity/KPI when things go according to plan.
Error messages from the kernel should be addressed, not silenced.
Signed-off-by: Eric Chanudet echanude@redhat.com