[systemd-devel] install Fedora systemd-nspawn container on btrfs

[arnaud gaboury]

On Thu, Apr 23, 2015 at 7:12 PM, Lennart Poettering
<lennart at poettering.net> wrote:
> On Thu, 23.04.15 19:00, arnaud gaboury (arnaud.gaboury at gmail.com) wrote:
>
>> On Thu, Apr 23, 2015 at 4:47 PM, Lennart Poettering
>> <lennart at poettering.net> wrote:
>> > On Thu, 23.04.15 14:18, arnaud gaboury (arnaud.gaboury at gmail.com) wrote:
>> >
>> >> > Pick one:
>> >> >
>> >> > a) download the raw image and use that, but it will be a loopback file
>> >> > with its own file system inside
>> >> >
>> >> > or:
>> >> >
>> >> > b) do the dnf/yum install root thing, and install it into a directory
>> >> > tree.
>> >>
>> >> I installed yum package on Arch but couldn't manage to do the install.
>> >>
>> >> # yum -y --releasever=22 --nogpg --installroot=/var/lib/machines/enl
>> >> --disablerepo='*' --enablerepo=fedora install systemd passwd dnf
>> >> fedora-release-server
>> >> Error getting repository data for fedora, repository not found
>> >> # yum repolist all
>> >> repolist: 0
>> >>
>> >> In fact, /etc/yum/repos.d is empty, so I am not surprised.
>> >
>> > Of course, you could use the .raw image, mount the extern btrfs volume
>> > into it via nspawn's --bind= switch, then use yum inside of that
>> > container to install into the btrfs volume. Then get rid of the .raw
>> > image again, and you still have the btrfs volume that should be
>> > bootable.
>> >
>> > A bit complex, but you almost were there already... ;-)
>>
>> Wunderbach
>>
>> # systemd-nspawn -M Fedora-Cloud-Base-22_Beta-20150415.x86_64.raw --
>> bind=/var/lib/machines/enl:/mnt
>> [root at Fedora-Cloud-Base-22_Beta-20150415 ~]#dnf -y --releasever=22
>> --nogpg --installroot=/mnt
>>  --disablerepo='*' --enablerepo=fedora install systemd passwd dnf
>> ................
>> Complete!
>>
>> -------------------------------------------------------------------------
>> $ ls /var/lib/machines/enl
>> boot/  etc/   media/  opt/   root/  srv/  tmp/  var/  lib@    sbin@
>> dev/   home/  mnt/    proc/  run/   sys/  usr/  bin@  lib64@
>> -------------------------------------------------------------------------------------
>>
>> But now booting but hanging:
>>
>> #systemd-nspawn -bD /var/lib/machines/enl
>> Spawning container enl on /var/lib/machines/enl.
>> Press ^] three times within 1s to kill container.
>> systemd 219 running in system mode. (+PAM +AUDIT +SELINUX +IMA
>> -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL
>> +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
>> Detected virtualization 'systemd-nspawn'.
>> Detected architecture 'x86-64'.
>> Running with unpopulated /etc.
>>
>> Welcome to Fedora 22 (Twenty Two)!
>>
>> Initializing machine ID from random generator.
>> Populated /etc with preset unit settings.
>> Unit etc.mount is bound to inactive unit dev-sdb1.device. Stopping, too.
>> Unit var.mount is bound to inactive unit dev-sdb1.device. Stopping, too.
>> Cannot add dependency job for unit display-manager.service, ignoring:
>> Unit display-manager.service failed to load: No such file or
>> directory.
>> Startup finished in 51ms.
>>
>> ------------------------------------------------------------------------
>>
>> Maybe my btrfs story ?
>> > Unit etc.mount is bound to inactive unit dev-sdb1.device. Stopping, too.
>> > Unit var.mount is bound to inactive unit dev-sdb1.device. Stopping, too.
>> Will investigate.
>>
>> --bind was certainly the most easy trick once the raw image is downloaded.
>
> Hmm, my guess is that you somehow lost the /etc and /var directories
> half way, probably because of the weird mounting your are
> doing. --bind= should normally be recursive, but maybe this didn't work?

root at hortensia ➤➤ lib/machines # ls poppy/etc
lvm/    systemd/  group    ld.so.cache  machine-id     os-release@  resolv.conf
pam.d/  udev/     gshadow  localtime@   nsswitch.conf  passwd       shadow

/etc seems correctly populated. Container boot but can't have login
prompt. It hangs with no possibility to enter anything.

> Lennart
>
> --
> Lennart Poettering, Red Hat



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