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 # shellcheck disable=SC2181
  18 if [ $? -ne 0 ]; then
  19         usage >&2
  20         exit 2
  21 fi
  22
  23 eval set -- "$ARGS"
  24
  25 while :; do
  26         case "$1" in
  27                 --help)
  28                         usage
  29                         exit 0
  30                         ;;
  31                 -k|--ssh-key)
  32                         ssh_key="$2"
  33                         shift 2
  34                         ;;
  35                 -u|--user-data)
  36                         user_data="$2"
  37                         shift 2
  38                         ;;
  39                 -v|--vendor-data)
  40                         vendor_data="$2"
  41                         shift 2
  42                         ;;
  43                 -h|--hostname)
  44                         hostname="$2"
  45                         shift 2
  46                         ;;
  47                 --)     shift
  48                         break
  49                         ;;
  50         esac
  51 done
  52
  53 config_image=$1
  54 shift
  55
  56 if [ "${ssh_key}" ] && [ -f "${ssh_key}" ]; then
  57         echo "adding pubkey from ${ssh_key}"
  58         ssh_key_data=$(cat "${ssh_key}")
  59 fi
  60
  61 uuid=$(uuidgen)
  62 if ! [ "${hostname}" ]; then
  63         hostname="${uuid}"
  64 fi
  65
  66 trap 'rm -rf $config_dir' EXIT
  67 config_dir=$(mktemp -t -d configXXXXXX)
  68
  69 if [ "${user_data}" ] && [ -f "${user_data}" ]; then
  70         echo "adding user data from ${user_data}"
  71         cp "${user_data}" "${config_dir}/user-data"
  72 else
  73         touch "${config_dir}/user-data"
  74 fi
  75
  76 if [ "${vendor_data}" ] && [ -f "${vendor_data}" ]; then
  77         echo "adding vendor data from ${vendor_data}"
  78         cp "${vendor_data}" "${config_dir}/vendor-data"
  79 fi
  80
  81 cat > "${config_dir}/meta-data" <<-EOF
  82 instance-id: ${uuid}
  83 hostname: ${hostname}
  84 local-hostname: ${hostname}
  85 EOF
  86
  87 if [ "${ssh_key_data}" ]; then
  88         cat >> "${config_dir}/meta-data" <<-EOF
  89         public-keys:
  90           - |
  91             ${ssh_key_data}
  92         EOF
  93 fi
  94
  95 #PS1="debug> " bash --norc
  96
  97 echo "generating configuration image at ${config_image}"
  98 if ! mkisofs -o "${config_image}" -V cidata -r -J --quiet "${config_dir}"; then
  99         echo "ERROR: failed to create ${config_image}" >&2
 100         exit 1
 101 fi
 102 chmod a+r "${config_image}"
 103