Hi,
I've got a task to have a small number of laptops netboot Linux over
WiFi. The kernel is loaded off the USB stick of cource, it's off topic
for now.
The WPA-supplicant daemon is started early by dracut off initrd. It
works. Mostly.
The problem is that upon shutdown systemd terminates all the processes
FIRST and unmounts filesystems NEXT.
Guess what? Upon termination, wpa-supplicant brings the wireless
interface down and the system hangs being unable to unmount now-defunct
NFSroot.
There were some discussions regarding similar matter and there's even
the RH Errata:
https://access.redhat.com/errata/RHBA-2018:2447
But I'm woking on a fully updated CentOS Linux release 7.8.2003 and
nevertheless I've got the problem.
I don't have rights to see the BZ.
https://bugzilla.redhat.com/show_bug.cgi?id=1593649
I'm deciding to use a quick and dirty hack to do a totally ungraceful
shutdown/reboot:
https://unix.stackexchange.com/questions/533307/systemd-fails-to-umount-manually-mounted-nfs-shares-in-initramfs
Any better ideas?
Best regards,
Dmitry Mikhailov.
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