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running old distributions under systemd‑nspawn

Contents: [Dobrica Pavlinušić's random unstructured stuff]
• Dobrica Pavlinušić's random unstructured stuff (install on host) 
• Dobrica Pavlinušić's random unstructured stuff (setup old distribution) 
• Dobrica Pavlinušić's random unstructured stuff (os‑release) 
• Dobrica Pavlinušić's random unstructured stuff (console) 
• Dobrica Pavlinušić's random unstructured stuff (network config) 
• Dobrica Pavlinušić's random unstructured stuff (start it) 
• Dobrica Pavlinušić's random unstructured stuff (alternative)

install on host
apt install systemd-container

setup old distribution
os‑release
root@saturn4:~# cat /saturn/etc/os-release
PRETTY_NAME="Debian GNU/Linux 4 (etch)"
NAME="Debian GNU/Linux"
VERSION_ID="4"
VERSION="4 (etch)"
VERSION_CODENAME=etch
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

console
root@saturn4:/saturn/etc# machinectl shell saturn /usr/bin/uptime
Failed to get shell PTY: Protocol error

fix it by adding console to inittab
dpavlin@saturn:~$ grep console /etc/inittab
0:2345:respawn:/sbin/getty 38400 console

network config
full access to host network, services are configured to listen to localhost
root@saturn4:/etc/systemd# mkdir nspawn

root@saturn4:/etc/systemd# cat > nspawn/saturn.nspawn
[Network]
VirtualEthernet=no

start it
root@saturn4:~# mv /saturn/ /var/lib/machines/
root@saturn4:~# machinectl enable saturn
Created symlink /etc/systemd/system/machines.target.wants/systemd-nspawn@saturn.service �/lib/systemd/system/systemd-nspawn@.service.
root@saturn4:~# machinectl start saturn

alternative
it seems that I'm unable to get console to work with systemd‑nspawn and Debian etch. So alternative approach is just to run services from systemd service file using chroot
root@saturn4:/etc/systemd/system# cat saturn\@.service
[Unit]
Description=SocialText saturn services

[Service]
User=root
Type=forking
ExecStart=/etc/systemd/system/saturn.sh /etc/init.d/%i start
ExecStop=/etc/systemd/system/saturn.sh /etc/init.d/%i stop
Restart=on-failure

[Install]
WantedBy=multi-user.target

root@saturn4:/etc/systemd/system# systemctl start saturn@postgresql-8.1
root@saturn4:/etc/systemd/system# systemctl start saturn@ceqlotron
root@saturn4:/etc/systemd/system# systemctl start saturn@st-apache
root@saturn4:/etc/systemd/system# systemctl start saturn@apache2