CentOS7 に systemd-nspawn用 CentOS7 コンテナを作成する

NEW_MACHINE='centos7'
yum --releasever=7 \
    --nogpg \
    --installroot=/var/lib/machines/${NEW_MACHINE} \
    --disablerepo='*' \
    --enablerepo=base \
    install systemd passwd yum vim

sudo systemd-nspawn -D /var/lib/machines/${NEW_MACHINE}
passwd
useradd -m -r user
passwd user
exit

# 起動確認
sudo systemd-nspawn -bD /var/lib/machines/${NEW_MACHINE}
Ctrl+]
Ctrl+]
Ctrl+]

# unit file 
systemctl enable systemd-nspawn@${NEW_MACHINE}.service

(echo '[Service]'
 echo 'ExecStart='
 echo 'ExecStart=/usr/bin/systemd-nspawn --quiet --keep-unit --boot --link-journal=try-guest --machine=%I'
) | SYSTEMD_EDITOR=tee systemctl edit systemd-nspawn@${NEW_MACHINE}.service

cat /usr/lib/systemd/system/systemd-nspawn@.service.
cat /etc/systemd/system/machines.target.wants/systemd-nspawn@${NEW_MACHINE}.service
cat /etc/systemd/system/systemd-nspawn@${NEW_MACHINE}.service.d/override.conf

machinectl start ${NEW_MACHINE}