mk-deb-chroot

   1 #!/bin/bash
   2 if [ "$EUID" -ne 0 ]
   3   then echo "Please run as root"
   4   exit
   5 fi
   6 if [ -z "$1"  ]
   7   then echo "need arg $1 for chroot to make"
   8   exit
   9 fi
  10 chrootdir="$1"
  11 echo "creating chroot '$chrootdir'"
  12 # Setup fstab mount points
  13 cat <<EOF >> /etc/fstab
  14 /dev      /opt/chroot/$chrootdir/dev      none   bind   0   0
  15 /dev/pts  /opt/chroot/$chrootdir/dev/pts  none   bind   0   0
  16 /proc     /opt/chroot/$chrootdir/proc     none   bind   0   0
  17 /sys      /opt/chroot/$chrootdir/sys      none   bind   0   0
  18 /tmp      /opt/chroot/$chrootdir/tmp      none   bind   0   0
  19 EOF
  20
  21 # Create coriolis chroot dir in /opt
  22 mkdir -p /opt/chroot/$chrootdir
  23 # Install debootstrap and schroot via apt
  24 apt install -y debootstrap schroot
  25 # Install debian/buster chroot using debootstrap
  26 /usr/sbin/debootstrap buster /opt/chroot/$chrootdir \
  27                       http://ftp.uk.debian.org/debian
  28 # Mount all chroot mount points from fstab
  29 mount /opt/chroot/$chrootdir/dev
  30 mount /opt/chroot/$chrootdir/dev/pts
  31 mount /opt/chroot/$chrootdir/proc
  32 mount /opt/chroot/$chrootdir/sys
  33 mount /opt/chroot/$chrootdir/tmp
  34 echo "$chrootdir" > /opt/chroot/$chrootdir/etc/debian_chroot
  35
  36 # Install apt dependencies in the chroot
  37 chroot /opt/chroot/$chrootdir /bin/bash << EOF
  38 echo Installing necessary apt dependencies in the chroot
  39 apt-get update -y
  40 apt-get upgrade -y
  41 apt-get install -y automake binutils-dev build-essential \
  42 ccache cmake gcc git \
  43 libtool \
  44 sysvinit-core \
  45 sysvinit-utils \
  46 sudo \
  47 python2.7 \
  48 python3 python3-pip \
  49 python3-setuptools python3-dev
  50
  51 # yeah systemd in a chroot? not very funny joke.
  52 apt-get remove -y systemd
  53
  54 # add sudo no password
  55 echo '$SUDO_USER ALL=NOPASSWD: ALL' >> /etc/sudoers.d/$chrootdir
  56
  57 # Create user with same UID in the chroot
  58 useradd -m -p `python3 -c 'import crypt; print (crypt.crypt("1234","Fx"))'` \
  59                 -s /bin/bash $SUDO_USER -k /etc/skel
  60 echo -e "
  61 Added user ${SUDO_USER} with \e[1;91mpassword: 1234\e[0m"
  62
  63 # add deb-src to sources
  64 echo deb-src http://ftp.debian.org/debian buster main > \
  65         /etc/apt/sources.list.d/bustersrc.list
  66
  67 echo -e "
  68 \e[1;91mPlease use command 'passwd ${SUDO_USER}' to change this immediately after this script is run for security purposes.\e[0m
  69 "
  70
  71 # Add convenience variable to chroot user .bash_profile
  72 echo -e 'export PATH=/usr/lib/ccache:"\044PATH"\nexport DISPLAY=:0.0\n' > /home/$SUDO_USER/.bash_profile
  73 chown $SUDO_USER /home/$SUDO_USER/.bash_profile
  74 chgrp $SUDO_USER /home/$SUDO_USER/.bash_profile
  75
  76 echo -e "Added 'export PATH=/usr/lib/ccache:\"\044PATH\"\nexport DISPLAY=:0.0' to /home/$SUDO_USER/.bash_profile to speed up rebuilds"
  77 EOF
  78
  79 # Add chroot config to schroot.conf
  80 cat <<EOF >>/etc/schroot/schroot.conf
  81 [$chrootdir]
  82 description=Debian Buster for $chrootdir
  83 directory=/opt/chroot/$chrootdir
  84 groups=sbuild-security,$SUDO_USER,users
  85 EOF
  86
  87 echo "Adding the following $chrootdir section to /etc/schroot/schroot.conf:
  88
  89 [$chrootdir]
  90 description=Debian Buster for $chrootdir
  91 directory=/opt/chroot/$chrootdir
  92 groups=sbuild-security,$SUDO_USER,users
  93
  94 This enables you to chroot into $chrootdir as an unprivileged user by running
  95 'schroot -c $chrootdir /bin/bash'
  96 "
  97