systemd-setup-machine-id leaving mount behind? (was "Bug#871835: Call for help: review patches for debootstrap")

Michael Biebl biebl at
Wed Jun 13 00:23:05 BST 2018

Hi Antonio

sorry for the late reply...

Am 13.06.2018 um 01:20 schrieb Michael Biebl:
> Am 22.04.2018 um 15:09 schrieb Antonio Terceiro:
>> # findmnt | grep machine-id
>> ├─/root/patched2/etc/machine-id                        /dev/mapper/lemur--vg-root[/root/patched2/run/machine-id] ext4            ro,relatime,errors=remount-ro,data=ordered
>> This explains the crash in mkosi and points the problem to something
>> that happens during the debootstrap run.
>> I compared the output of debootstrap from unstable with the patched
>> debootstrap, and they are idential, i.e. packages are installed in the
>> same order, but for some reason, when running with the faster
>> debootstrap, the above mount is left over.
>> Looking around, I suspect that this could be left behind by
>> systemd-machine-id-setup, however, I couldn't understand yet why this
>> would happen.
>> systemd team: could you provide any insight? for reference, I am
>> attaching the current diff between debootstrap master branch, and a
>> local branch where I have Thomas Lange's patched applied.
> I just stumbled over this today myself when using vmdebootstrap where I
> ran into the same issue as in [1]
> As I couldn't reproduce the failure with cdebootstrap or debootstrap
> from stretch, I ran a git bisect against debootstrap.
> The first faulty commit is
> And sure enough, reverting that commit fixed the dangling machine-id
> mount for me.
> Henrich, do you want a bug report against debootstrap for that?

Fwiw, I didn't use systemd-nspawn or lxc.
All I did was run
# debootstrap sid /tmp/test-sid

Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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