Comment 17 for bug 1729145

Ryan,

As discussed in IRC, I tweaked locations for testing in #11 and added all paths in #14.

Looks like after `mount -n -o move /dev ${rootmnt}/dev` ${rootmnt}/dev has the proper content (see the bcache rule as well)

https://paste.ubuntu.com/26082611/
== before ==
lrwxrwxrwx 1 13 /dev/bcache/by-uuid/aa04ab39-a42c-446f-aff5-addbd9c80e06 -> ../../bcache0
lrwxrwxrwx 1 13 /dev/bcache/by-uuid/835afacf-6213-48a9-864c-43733822668b -> ../../bcache3
lrwxrwxrwx 1 13 /dev/bcache/by-uuid/727212eb-0f0b-4d20-9191-f0577a38454e -> ../../bcache1
lrwxrwxrwx 1 13 /dev/bcache/by-uuid/2963855b-3d2b-4387-abd1-3ae788919de4 -> ../../bcache2

== after ==
lrwxrwxrwx 1 13 /root/dev/bcache/by-uuid/aa04ab39-a42c-446f-aff5-addbd9c80e06 -> ../../bcache0
lrwxrwxrwx 1 13 /root/dev/bcache/by-uuid/835afacf-6213-48a9-864c-43733822668b -> ../../bcache3
lrwxrwxrwx 1 13 /root/dev/bcache/by-uuid/727212eb-0f0b-4d20-9191-f0577a38454e -> ../../bcache1
lrwxrwxrwx 1 13 /root/dev/bcache/by-uuid/2963855b-3d2b-4387-abd1-3ae788919de4 -> ../../bcache2

So the problem must be further down.

And about the only thing I see in the init script is run-init from klibc:

# Chain to real filesystem
exec run-init ${drop_caps} ${rootmnt} ${init} "$@" ${recovery:+--startup-event=recovery} <${rootmnt}/dev/console >${rootmnt}/dev/console 2>&1

So it's either somewhere in run-init code

https://git.launchpad.net/~usd-import-team/ubuntu/+source/klibc/tree/usr/kinit/run-init/runinitlib.c?h=applied/ubuntu/xenial-updates#n158

or in systemd.