Package: mmdebstrap
Version: 1.4.1-1
Severity: normal
Hello Johannes!
I've been able to create a QEMU/KVM virtual machine image for autopkgtests:
$ mkdir -p ~/var/cache/sbuild/
$ cd /dev/shm
$ TMPDIR=/dev/shm mmdebstrap-autopkgtest-build-qemu \
--size=25G --boot=efi sid sid-amd64.img
$ chmod 660 sid-amd64.img
$ mv -i sid-amd64.img ~/var/cache/sbuild/
It is able to run autopkgtests:
$ autopkgtest --output-dir ./${SRCPKG}_autopkgtest.out \
--summary ./${SRCPKG}_autopkgtest.summary \
--apt-upgrade -B ./${SRCPKG}_amd64.changes -- \
qemu --boot=efi --overlay-dir /dev/shm \
~/var/cache/sbuild/sid-amd64.img
My comments / suggestions for improvements:
* I had to manually fix the permissions, since the image file was
originally created with the following weird ones:
$ ls -l --si sid-amd64.img
-rw-r-xrwx 1 $USER $USER 27G Jan 27 17:48 sid-amd64.img
I think the file permissions should be set (possibly at the end of the
mmdebstrap-autopkgtest-build-qemu run) as they would "naturally"
result from the user's umask:
$ cd /dev/shm
$ touch foo
$ ls -l --si foo
-rw-rw---- 1 $USER $USER 0 Jan 27 19:00 foo
That's why I manually changed the permissions at the end:
$ chmod 660 sid-amd64.img
$ ls -l --si sid_amd64.img
-rw-rw---- 1 $USER $USER 27G Jan 27 17:48 sid-amd64.img
I suggest that mmdebstrap-autopkgtest-build-qemu applies this fix
automatically.
* I was surprised to see a 25 GiB image fit into a 7.7 GiB filesystem:
$ cd /dev/shm
$ ls -l -h sid-amd64.img
-rw-rw---- 1 $USER $USER 26G Jan 27 17:48 sid-amd64.img
$ df -h .
Filesystem Size Used Avail Use% Mounted on
tmpfs 7.7G 765M 7.0G 10% /dev/shm
Well, the mystery is solved by looking at the allocated size:
$ ls -l -h -s sid-amd64.img
662M -rw-rw---- 1 $USER $USER 26G Jan 27 17:48 sid-amd64.img
Would it be less confusing, if mmdebstrap-autopkgtest-build-qemu created
.qcow2 images?
-- System Information:
Debian Release: trixie/sid
APT prefers testing
APT policy: (800, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.5.0-5-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages mmdebstrap depends on:
ii apt 2.7.10
ii perl 5.38.2-3
ii python3 3.11.6-1
Versions of packages mmdebstrap recommends:
ii arch-test 0.21-1
ii fakechroot 2.20.1+ds-15
ii fakeroot 1.33-1
ii gpg 2.2.40-1.1+b1
ii libdistro-info-perl 1.7
ii libdpkg-perl 1.22.2
ii mount 2.39.3-6
ii uidmap 1:4.13+dfsg1-3+b1
Versions of packages mmdebstrap suggests:
pn apt-transport-tor <none>
ii apt-utils 2.7.10
ii ca-certificates 20230311
ii debootstrap 1.0.134
ii distro-info-data 0.60
ii dpkg-dev 1.22.2
pn genext2fs <none>
ii perl-doc 5.38.2-3
pn qemu-user <none>
pn qemu-user-static <none>
pn squashfs-tools-ng <none>
ii systemd 255.2-4
-- no debconf information
