Message-ID: <8db9c97f9f17a2d1565cb7f31c4f7b6459212578.camel@riseup.net>
Subject: Re: Booting Alpine by systemd-nspawn fails - Was: Install on single
 partition and without a bootloader
From: Ralf Mardorf <ralf-mardorf@riseup.net>
To: ~alpine/users@lists.alpinelinux.org
Date: Thu, 01 Jun 2023 08:06:19 +0200
In-Reply-To: <de1259c6faefcec000948b199cf9169adeb7dc10.camel@riseup.net>
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Hi,

it's solved by gaining knowledge. Microsoft employee and Pwnie Award
winner Lennart Poettering once claimed that "Systemd-Nspawn is Chroot on
Steroids". He's probably right about the side effects of steroid abuse,
since systemd-nspawn only likes Linux that uses systemd, it's completely
intolerant of other init systems, and systemd-nspawn is impotent.

On my todo list is writing a chroot wrapper script, providing some
comfort. On the quick I wrote a "reminder" of what I want to do. The
"reminder" script is a ridiculous script, but it's just to remind me
what I want to get next should I have the time to write a wrapper.

Regards,
Ralf

;D

#! /bin/dash
# chroot-alpine
# v2023-05-31-1

CHROOT=3Dm1.alpine

usage() {
cat<<EOF

Root privileges are mandatory
Usage:
  chroot-alpine       mount   Alpine chroot no X server
  chroot-alpine -u    unmount Alpine chroot no X server

EOF
exit
}

[ $(id -u) -eq 0 ] || usage

case $2 in
  "")  ;;
   *)  usage
       ;;
esac

case $1 in
  -u)  printf "\n"                                      # umount --recursiv=
e "$(blkid -L$CHROOT)" doesn't work
       umount --recursive /mnt/$CHROOT/                 # workaround, runni=
ng two times,
       umount --recursive /mnt/$CHROOT/ >/dev/null 2>&1 # if Alpine was alr=
eady mounted before running this script
       rmdir  /mnt/$CHROOT/ && printf "[done]\n"        # doesn't work if m=
ounted countless times
       printf "\n"                                      # at same or differ=
ent mount points
       ;;
  "")  mkdir -p /mnt/$CHROOT
       mount -wL$CHROOT /mnt/$CHROOT/ -o noatime
       mount -t proc  /proc /mnt/$CHROOT/proc/
       mount -t sysfs /sys  /mnt/$CHROOT/sys/
       mount -o bind  /dev  /mnt/$CHROOT/dev/
       mount -o bind  /run  /mnt/$CHROOT/run/
       #printf "\nDISPLAY=3D$DISPLAY\n\n$CHROOT is mounted:\n$(mount | sort=
 -u | grep $(blkid -L$CHROOT))\n\n"
       printf "\nDISPLAY=3D$DISPLAY\n\n$CHROOT is mounted:\n$(mount | grep =
$(blkid -L$CHROOT))\n\n" # better not hiding duplicates by sort -u
       chroot /mnt/$CHROOT/ /bin/sh -l
       ;;
   *)  usage
       ;;
esac

exit