github.com/tompao/docker@v1.9.1/contrib/mkimage-busybox.sh (about)

     1  #!/usr/bin/env bash
     2  # Generate a very minimal filesystem based on busybox-static,
     3  # and load it into the local docker under the name "busybox".
     4  
     5  echo >&2
     6  echo >&2 'warning: this script is deprecated - see mkimage.sh and mkimage/busybox-static'
     7  echo >&2
     8  
     9  BUSYBOX=$(which busybox)
    10  [ "$BUSYBOX" ] || {
    11      echo "Sorry, I could not locate busybox."
    12      echo "Try 'apt-get install busybox-static'?"
    13      exit 1
    14  }
    15  
    16  set -e
    17  ROOTFS=${TMPDIR:-/var/tmp}/rootfs-busybox-$$-$RANDOM
    18  mkdir $ROOTFS
    19  cd $ROOTFS
    20  
    21  mkdir bin etc dev dev/pts lib proc sys tmp
    22  touch etc/resolv.conf
    23  cp /etc/nsswitch.conf etc/nsswitch.conf
    24  echo root:x:0:0:root:/:/bin/sh > etc/passwd
    25  echo root:x:0: > etc/group
    26  ln -s lib lib64
    27  ln -s bin sbin
    28  cp $BUSYBOX bin
    29  for X in $(busybox --list)
    30  do
    31      ln -s busybox bin/$X
    32  done
    33  rm bin/init
    34  ln bin/busybox bin/init
    35  cp /lib/x86_64-linux-gnu/lib{pthread,c,dl,nsl,nss_*}.so.* lib
    36  cp /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 lib
    37  for X in console null ptmx random stdin stdout stderr tty urandom zero
    38  do
    39      cp -a /dev/$X dev
    40  done
    41  
    42  tar --numeric-owner -cf- . | docker import - busybox
    43  docker run -i -u root busybox /bin/echo Success.