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Using systemd-nspawn in Arch Linux ARM for
2018-06-26 07:28:04 +0300

Since I started using, I had to decide how to install it on my Raspberry Pi 3 running Arch Linux ARM. First I tried to repackage the official .deb for pacman: PKGCONFIG. It worked out for a while until another Arch update. Then I tried to [build]({% post_url 2017/2017-12-17-qemu-rpi %}) the machinery by myself. It turned out not to be easy, ending up with lot of functionality disabled or not reliable. Finally, I've come to yet another solution: running the genuine raspbian contained [systemd-nspawn]({% post_url 2016/2016-11-28-systemd-nspawn %}) to enable official builds following the guide.

  • So I installed Raspbian into /var/lib/machines using debootstrap first (I wish I could find [aconfmgr]({% post_url 2018/2018-01-18-arch-config %}) for Debian!).

  • To launch it manually from the command line:

cd /var/lib/machines && systemd-nspawn --bind /dev/video0 --bind /dev/vchiq -bD raspbian`

* It took some effort to tune the system, install,
  `libraspberrypi-bin` and other dependencies (Update: created a script to
  prepare the raspbian for chroot automatically:

* Then I created configuration and service files to start raspbian automatically
  on boot: [the change](

* NOTE: the guest uses host networking for simplicity and interoperability with
  [tinc]({% post_url 2018/2018-04-08-tinc %}).

* NOTE: it's required to explicitly specify which mapped dev files to
  allow the access.

* Finally, I could
  [remove]( from the host system.

As an illustration, here is the status of the container:

[sakhnik@alarmpi3 ~]$ machinectl status raspbian raspbian(d2c01930a9414d59a6e15d4f40770785) Since: Mon 2018-06-25 09:35:34 EEST; 22h ago Leader: 27119 (systemd) Service: systemd-nspawn; class container Root: /var/lib/machines/raspbian OS: Raspbian GNU/Linux 9 (stretch) Unit: systemd-nspawn@raspbian.service ├─ 956 /usr/bin/kerberosio ├─27117 /usr/bin/systemd-nspawn --quiet --keep-unit --boot --link-journal=try-guest --network-veth -U --sett> ├─27119 /lib/systemd/systemd ├─27133 /lib/systemd/systemd-journald ├─27174 php-fpm: master process (/etc/php/7.0/fpm/php-fpm.conf) ├─27175 /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation ├─27178 /usr/sbin/cron -f ├─27180 /lib/systemd/systemd-logind ├─27182 /usr/sbin/rsyslogd -n ├─27190 /sbin/agetty --noclear --keep-baud console 115200,38400,9600 vt220 ├─27192 php-fpm: pool www ├─27193 php-fpm: pool www ├─27194 nginx: master process /usr/sbin/nginx -g daemon on; master_process on; ├─27195 nginx: worker process ├─27196 nginx: worker process ├─27197 nginx: worker process ├─27198 nginx: worker process └─27561 php-fpm: pool www