mcp/scripts/create-config-drive.sh

   1 #!/bin/bash
   2
   3 # This will generate a openstack-style config drive image suitable for
   4 # use with cloud-init.  You may optionally pass in an ssh public key
   5 # (using the -k/--ssh-key option) and a user-data blog (using the
   6 # -u/--user-data option).
   7
   8 usage () {
   9         echo "usage: ${0##*/}: [--ssh-key <pubkey>] [--vendor-data <file>] [--user-data <file>] [--hostname <hostname>] <imagename>"
  10 }
  11
  12 ARGS=$(getopt \
  13         -o k:u:v:h: \
  14         --long help,hostname:,ssh-key:,user-data:,vendor-data: -n ${0##*/} \
  15         -- "$@")
  16
  17 if [ $? -ne 0 ]; then
  18         usage >&2
  19         exit 2
  20 fi
  21
  22 eval set -- "$ARGS"
  23
  24 while :; do
  25         case "$1" in
  26                 --help)
  27                         usage
  28                         exit 0
  29                         ;;
  30                 -k|--ssh-key)
  31                         ssh_key="$2"
  32                         shift 2
  33                         ;;
  34                 -u|--user-data)
  35                         user_data="$2"
  36                         shift 2
  37                         ;;
  38                 -v|--vendor-data)
  39                         vendor_data="$2"
  40                         shift 2
  41                         ;;
  42                 -h|--hostname)
  43                         hostname="$2"
  44                         shift 2
  45                         ;;
  46                 --)     shift
  47                         break
  48                         ;;
  49         esac
  50 done
  51
  52 config_image=$1
  53 shift
  54
  55 if [ "$ssh_key" ] && [ -f "$ssh_key" ]; then
  56         echo "adding pubkey from $ssh_key"
  57         ssh_key_data=$(cat "$ssh_key")
  58 fi
  59
  60 uuid=$(uuidgen)
  61 if ! [ "$hostname" ]; then
  62         hostname="$uuid"
  63 fi
  64
  65 trap 'rm -rf $config_dir' EXIT
  66 config_dir=$(mktemp -t -d configXXXXXX)
  67
  68 if [ "$user_data" ] && [ -f "$user_data" ]; then
  69         echo "adding user data from $user_data"
  70         cp ${user_data} ${config_dir}/user-data
  71 else
  72         touch $config_dir/user-data
  73 fi
  74
  75 if [ "$vendor_data" ] && [ -f "$vendor_data" ]; then
  76         echo "adding vendor data from $vendor_data"
  77         cp ${vendor_data} ${config_dir}/vendor-data
  78 fi
  79
  80 cat > $config_dir/meta-data <<-EOF
  81 instance-id: $uuid
  82 hostname: $hostname
  83 local-hostname: $hostname
  84 EOF
  85
  86 if [ "$ssh_key_data" ]; then
  87         cat >> $config_dir/meta-data <<-EOF
  88         public-keys:
  89           - |
  90             $ssh_key_data
  91         EOF
  92 fi
  93
  94 #PS1="debug> " bash --norc
  95
  96 echo "generating configuration image at $config_image"
  97 if ! mkisofs -o $config_image -V cidata -r -J --quiet $config_dir; then
  98         echo "ERROR: failed to create $config_image" >&2
  99         exit 1
 100 fi
 101 chmod a+r $config_image
 102