src/initscripts/helper/aws-setup

   1 #!/bin/bash
   2
   3 . /etc/sysconfig/rc
   4 . ${rc_functions}
   5
   6 get() {
   7         local file="${1}"
   8
   9         wget -qO - "http://169.254.169.254/latest/meta-data/${file}"
  10 }
  11
  12 to_address() {
  13         local n="${1}"
  14
  15         local o1=$(( (n & 0xff000000) >> 24 ))
  16         local o2=$(( (n & 0xff0000) >> 16 ))
  17         local o3=$(( (n & 0xff00) >> 8 ))
  18         local o4=$(( (n & 0xff) ))
  19
  20         printf "%d.%d.%d.%d\n" "${o1}" "${o2}" "${o3}" "${o4}"
  21 }
  22
  23 to_integer() {
  24         local address="${1}"
  25
  26         local integer=0
  27
  28         local i
  29         for i in ${address//\./ }; do
  30                 integer=$(( (integer << 8) + i ))
  31         done
  32
  33         printf "%d\n" "${integer}"
  34 }
  35
  36 prefix2netmask() {
  37         local prefix=${1}
  38
  39         local zeros=$(( 32 - prefix ))
  40         local netmask=0
  41
  42         local i
  43         for (( i=0; i<${zeros}; i++ )); do
  44                 netmask=$(( (netmask << 1) ^ 1 ))
  45         done
  46
  47         to_address "$(( netmask ^ 0xffffffff ))"
  48 }
  49
  50 find_interface() {
  51         local mac="${1}"
  52
  53         local path
  54         for path in /sys/class/net/*; do
  55                 local address="$(<${path}/address)"
  56
  57                 if [ "${mac}" = "${address}" ]; then
  58                         basename "${path}"
  59                         return 0
  60                 fi
  61         done
  62
  63         return 1
  64 }
  65
  66 import_aws_configuration() {
  67         local instance_id="$(get instance-id)"
  68
  69         boot_mesg "Importing AWS configuration for instance ${instance_id}..."
  70
  71         # Store instance ID
  72         echo "${instance_id}" > /var/run/aws-instance-id
  73
  74         # Initialise system settings
  75         local hostname=$(get local-hostname)
  76
  77         # Set hostname
  78         if ! grep -q "^HOSTNAME=" /var/ipfire/main/settings; then
  79                 echo "HOSTNAME=${hostname%%.*}" >> /var/ipfire/main/settings
  80         fi
  81
  82         # Set domainname
  83         if ! grep -q "^DOMAINNAME=" /var/ipfire/main/settings; then
  84                 echo "DOMAINNAME=${hostname#*.}" >> /var/ipfire/main/settings
  85         fi
  86
  87         # Create setup user
  88         if ! getent passwd setup &>/dev/null; then
  89                 useradd setup -s /usr/bin/run-setup -g nobody -m
  90
  91                 # Unlock the account
  92                 usermod -p "x" setup
  93         fi
  94
  95         # Import SSH keys for setup user
  96         local line
  97         for line in $(get "public-keys/"); do
  98                 local key_no="${line%=*}"
  99
 100                 local key="$(get public-keys/${key_no}/openssh-key)"
 101                 if [ -n "${key}" ] && ! grep -q "^${key}$" "/home/setup/.ssh/authorized_keys" 2>/dev/null; then
 102                         mkdir -p "/home/setup/.ssh"
 103                         chmod 700 "/home/setup/.ssh"
 104                         chown setup.nobody "/home/setup/.ssh"
 105
 106                         echo "${key}" >> "/home/setup/.ssh/authorized_keys"
 107                         chmod 600 "/home/setup/.ssh/authorized_keys"
 108                         chown setup.nobody "/home/setup/.ssh/authorized_keys"
 109                 fi
 110         done
 111
 112         # Import any DNS server settings
 113         eval $(/usr/local/bin/readhash <(grep -E "^DNS([0-9])=" /var/ipfire/ethernet/settings 2>/dev/null))
 114
 115         # Import network configuration
 116         # After this, no network connectivity will be available from this script due to the
 117         # renaming of the network interfaces for which they have to be shut down
 118         local config_type=1
 119         : > /var/ipfire/ethernet/settings
 120
 121         local mac
 122         for mac in $(get network/interfaces/macs/); do
 123                 # Remove trailing slash
 124                 mac="${mac//\//}"
 125
 126                 local device_number="$(get "network/interfaces/macs/${mac}/device-number")"
 127                 local interface_id="$(get "network/interfaces/macs/${mac}/interface-id")"
 128
 129                 # First IPv4 address
 130                 local ipv4_address="$(get "network/interfaces/macs/${mac}/local-ipv4s" | head -n1)"
 131                 local ipv4_address_num="$(to_integer "${ipv4_address}")"
 132
 133                 # Get VPC subnet
 134                 local vpc="$(get "network/interfaces/macs/${mac}/vpc-ipv4-cidr-block")"
 135                 local vpc_netaddress="${vpc%/*}"
 136                 local vpc_netaddress_num="$(to_integer "${vpc_netaddress}")"
 137
 138                 # Get subnet size
 139                 local subnet="$(get "network/interfaces/macs/${mac}/subnet-ipv4-cidr-block")"
 140
 141                 local prefix="${subnet#*/}"
 142                 local netmask="$(prefix2netmask "${prefix}")"
 143                 local netmask_num="$(to_integer "${netmask}")"
 144
 145                 # Calculate the network and broadcast addresses
 146                 local netaddress="${subnet%/*}"
 147                 local netaddress_num="$(to_integer "${netaddress}")"
 148                 local broadcast="$(to_address $(( ipv4_address_num | (0xffffffff ^ netmask_num) )))"
 149
 150                 case "${device_number}" in
 151                         # RED
 152                         0)
 153                                 local interface_name="red0"
 154
 155                                 # The gateway is always the first IP address in the subnet
 156                                 local gateway="$(to_address $(( netaddress_num + 1 )))"
 157
 158                                 # The AWS internal DNS service is available on the second IP address of the VPC
 159                                 local dns1="$(to_address $(( vpc_netaddress_num + 2 )))"
 160                                 local dns2=
 161
 162                                 (
 163                                         echo "RED_TYPE=STATIC"
 164                                         echo "RED_DEV=${interface_name}"
 165                                         echo "RED_MACADDR=${mac}"
 166                                         echo "RED_DESCRIPTION='${interface_id}'"
 167                                         echo "RED_ADDRESS=${ipv4_address}"
 168                                         echo "RED_NETMASK=${netmask}"
 169                                         echo "RED_NETADDRESS=${netaddress}"
 170                                         echo "RED_BROADCAST=${broadcast}"
 171                                         echo "DEFAULT_GATEWAY=${gateway}"
 172                                         echo "DNS1=${DNS1:-${dns1}}"
 173                                         echo "DNS2=${DNS2:-${dns2}}"
 174                                 ) >> /var/ipfire/ethernet/settings
 175
 176                                 # Import aliases for RED
 177                                 for alias in $(get "network/interfaces/macs/${mac}/local-ipv4s" | tail -n +2); do
 178                                         echo "${alias},on,"
 179                                 done > /var/ipfire/ethernet/aliases
 180                                 ;;
 181
 182                         # GREEN
 183                         1)
 184                                 local interface_name="green0"
 185
 186                                 (
 187                                         echo "GREEN_DEV=${interface_name}"
 188                                         echo "GREEN_MACADDR=${mac}"
 189                                         echo "GREEN_DESCRIPTION='${interface_id}'"
 190                                         echo "GREEN_ADDRESS=${ipv4_address}"
 191                                         echo "GREEN_NETMASK=${netmask}"
 192                                         echo "GREEN_NETADDRESS=${netaddress}"
 193                                         echo "GREEN_BROADCAST=${broadcast}"
 194                                 ) >> /var/ipfire/ethernet/settings
 195                                 ;;
 196
 197                         # ORANGE
 198                         2)
 199                                 local interface_name="orange0"
 200                                 config_type=2
 201
 202                                 (
 203                                         echo "ORANGE_DEV=${interface_name}"
 204                                         echo "ORANGE_MACADDR=${mac}"
 205                                         echo "ORANGE_DESCRIPTION='${interface_id}'"
 206                                         echo "ORANGE_ADDRESS=${ipv4_address}"
 207                                         echo "ORANGE_NETMASK=${netmask}"
 208                                         echo "ORANGE_NETADDRESS=${netaddress}"
 209                                         echo "ORANGE_BROADCAST=${broadcast}"
 210                                 ) >> /var/ipfire/ethernet/settings
 211                                 ;;
 212                 esac
 213
 214                 # Rename interface
 215                 local interface="$(find_interface "${mac}")"
 216
 217                 if [ -n "${interface}" ] && [ -n "${interface_name}" ] && [ "${interface}" != "${interface_name}" ]; then
 218                         ip link set "${interface}" down
 219                         ip link set "${interface}" name "${interface_name}"
 220                 fi
 221         done
 222
 223         # Save CONFIG_TYPE
 224         echo "CONFIG_TYPE=${config_type}" >> /var/ipfire/ethernet/settings
 225
 226         # Actions performed only on the very first start
 227         if [ ! -e "/var/ipfire/main/firstsetup_ok" ]; then
 228                 # Enable SSH
 229                 sed -e "s/ENABLE_SSH=.*/ENABLE_SSH=on/g" -i /var/ipfire/remote/settings
 230
 231                 # Enable SSH key authentication
 232                 sed -e "s/^ENABLE_SSH_KEYS=.*/ENABLE_SSH_KEYS=on/" -i /var/ipfire/remote/settings
 233
 234                 # Apply SSH settings
 235                 /usr/local/bin/sshctrl
 236
 237                 # Mark SSH to start immediately (but not right now)
 238                 touch /var/ipfire/remote/enablessh
 239                 chown nobody:nobody /var/ipfire/remote/enablessh
 240
 241                 # Firewall rules for SSH and WEBIF
 242                 (
 243                         echo "1,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,cust_srv,SSH,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 244                         echo "2,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,TGT_PORT,444,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 245                 ) >> /var/ipfire/firewall/input
 246
 247                 # This script has now completed the first steps of setup
 248                 touch /var/ipfire/main/firstsetup_ok
 249         fi
 250
 251         # All done
 252         echo_ok
 253 }
 254
 255 case "${reason}" in
 256         PREINIT)
 257                 # Bring up the interface
 258                 ip link set "${interface}" up
 259                 ;;
 260
 261         BOUND|RENEW|REBIND|REBOOT)
 262                 # Remove any previous IP addresses
 263                 ip addr flush dev "${interface}"
 264
 265                 # Add (or re-add) the new IP address
 266                 ip addr add "${new_ip_address}/${new_subnet_mask}" dev "${interface}"
 267
 268                 # Add the default route
 269                 ip route add default via "${new_routers}"
 270
 271                 # Import AWS configuration
 272                 import_aws_configuration
 273                 ;;
 274
 275         EXPIRE|FAIL|RELEASE|STOP)
 276                 # Remove all IP addresses
 277                 ip addr flush dev "${interface}"
 278                 ;;
 279
 280         *)
 281                 echo "Unhandled reason: ${reason}" >&2
 282                 exit 2
 283                 ;;
 284 esac
 285
 286 # Terminate
 287 exit 0