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         # Import SSH keys
  88         local line
  89         for line in $(get "public-keys/"); do
  90                 local key_no="${line%=*}"
  91
  92                 local key="$(get public-keys/${key_no}/openssh-key)"
  93                 if [ -n "${key}" ] && ! grep -q "^${key}$" /root/.ssh/authorized_keys 2>/dev/null; then
  94                         mkdir -p /root/.ssh
  95                         chmod 700 /root/.ssh
  96
  97                         echo "${key}" >> /root/.ssh/authorized_keys
  98                         chmod 600 /root/.ssh/authorized_keys
  99                 fi
 100         done
 101
 102         # Import any DNS server settings
 103         eval $(/usr/local/bin/readhash <(grep -E "^DNS([0-9])=" /var/ipfire/ethernet/settings 2>/dev/null))
 104
 105         # Import network configuration
 106         # After this, no network connectivity will be available from this script due to the
 107         # renaming of the network interfaces for which they have to be shut down
 108         local config_type=1
 109         : > /var/ipfire/ethernet/settings
 110
 111         local mac
 112         for mac in $(get network/interfaces/macs/); do
 113                 # Remove trailing slash
 114                 mac="${mac//\//}"
 115
 116                 local device_number="$(get "network/interfaces/macs/${mac}/device-number")"
 117                 local interface_id="$(get "network/interfaces/macs/${mac}/interface-id")"
 118
 119                 # First IPv4 address
 120                 local ipv4_address="$(get "network/interfaces/macs/${mac}/local-ipv4s" | head -n1)"
 121                 local ipv4_address_num="$(to_integer "${ipv4_address}")"
 122
 123                 # Get VPC subnet
 124                 local vpc="$(get "network/interfaces/macs/${mac}/vpc-ipv4-cidr-block")"
 125                 local vpc_netaddress="${vpc%/*}"
 126                 local vpc_netaddress_num="$(to_integer "${vpc_netaddress}")"
 127
 128                 # Get subnet size
 129                 local subnet="$(get "network/interfaces/macs/${mac}/subnet-ipv4-cidr-block")"
 130
 131                 local prefix="${subnet#*/}"
 132                 local netmask="$(prefix2netmask "${prefix}")"
 133                 local netmask_num="$(to_integer "${netmask}")"
 134
 135                 # Calculate the network and broadcast addresses
 136                 local netaddress="${subnet%/*}"
 137                 local netaddress_num="$(to_integer "${netaddress}")"
 138                 local broadcast="$(to_address $(( ipv4_address_num | (0xffffffff ^ netmask_num) )))"
 139
 140                 case "${device_number}" in
 141                         # RED
 142                         0)
 143                                 local interface_name="red0"
 144
 145                                 # The gateway is always the first IP address in the subnet
 146                                 local gateway="$(to_address $(( netaddress_num + 1 )))"
 147
 148                                 # The AWS internal DNS service is available on the second IP address of the VPC
 149                                 local dns1="$(to_address $(( vpc_netaddress_num + 2 )))"
 150                                 local dns2=
 151
 152                                 (
 153                                         echo "RED_TYPE=STATIC"
 154                                         echo "RED_DEV=${interface_name}"
 155                                         echo "RED_MACADDR=${mac}"
 156                                         echo "RED_DESCRIPTION='${interface_id}'"
 157                                         echo "RED_ADDRESS=${ipv4_address}"
 158                                         echo "RED_NETMASK=${netmask}"
 159                                         echo "RED_NETADDRESS=${netaddress}"
 160                                         echo "RED_BROADCAST=${broadcast}"
 161                                         echo "DEFAULT_GATEWAY=${gateway}"
 162                                         echo "DNS1=${DNS1:-${dns1}}"
 163                                         echo "DNS2=${DNS2:-${dns2}}"
 164                                 ) >> /var/ipfire/ethernet/settings
 165
 166                                 # Import aliases for RED
 167                                 for alias in $(get "network/interfaces/macs/${mac}/local-ipv4s" | tail -n +2); do
 168                                         echo "${alias},on,"
 169                                 done > /var/ipfire/ethernet/aliases
 170                                 ;;
 171
 172                         # GREEN
 173                         1)
 174                                 local interface_name="green0"
 175
 176                                 (
 177                                         echo "GREEN_DEV=${interface_name}"
 178                                         echo "GREEN_MACADDR=${mac}"
 179                                         echo "GREEN_DESCRIPTION='${interface_id}'"
 180                                         echo "GREEN_ADDRESS=${ipv4_address}"
 181                                         echo "GREEN_NETMASK=${netmask}"
 182                                         echo "GREEN_NETADDRESS=${netaddress}"
 183                                         echo "GREEN_BROADCAST=${broadcast}"
 184                                 ) >> /var/ipfire/ethernet/settings
 185                                 ;;
 186
 187                         # ORANGE
 188                         2)
 189                                 local interface_name="orange0"
 190                                 config_type=2
 191
 192                                 (
 193                                         echo "ORANGE_DEV=${interface_name}"
 194                                         echo "ORANGE_MACADDR=${mac}"
 195                                         echo "ORANGE_DESCRIPTION='${interface_id}'"
 196                                         echo "ORANGE_ADDRESS=${ipv4_address}"
 197                                         echo "ORANGE_NETMASK=${netmask}"
 198                                         echo "ORANGE_NETADDRESS=${netaddress}"
 199                                         echo "ORANGE_BROADCAST=${broadcast}"
 200                                 ) >> /var/ipfire/ethernet/settings
 201                                 ;;
 202                 esac
 203
 204                 # Rename interface
 205                 local interface="$(find_interface "${mac}")"
 206
 207                 if [ -n "${interface}" ] && [ -n "${interface_name}" ] && [ "${interface}" != "${interface_name}" ]; then
 208                         ip link set "${interface}" down
 209                         ip link set "${interface}" name "${interface_name}"
 210                 fi
 211         done
 212
 213         # Save CONFIG_TYPE
 214         echo "CONFIG_TYPE=${config_type}" >> /var/ipfire/ethernet/settings
 215
 216         # Actions performed only on the very first start
 217         if [ ! -e "/var/ipfire/main/firstsetup_ok" ]; then
 218                 # Enable SSH
 219                 sed -e "s/ENABLE_SSH=.*/ENABLE_SSH=on/g" -i /var/ipfire/remote/settings
 220
 221                 touch /var/ipfire/remote/enablessh
 222                 chown nobody:nobody /var/ipfire/remote/enablessh
 223
 224                 # Enable SSH key authentication
 225                 sed -e "s/^ENABLE_SSH_KEYS=.*/ENABLE_SSH_KEYS=on/" -i /var/ipfire/remote/settings
 226
 227                 # Apply SSH settings
 228                 /usr/local/bin/sshctrl
 229
 230                 # Firewall rules for SSH and WEBIF
 231                 (
 232                         echo "1,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,cust_srv,SSH,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 233                         echo "2,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,TGT_PORT,444,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 234                 ) >> /var/ipfire/firewall/input
 235
 236                 # This script has now completed the first steps of setup
 237                 touch /var/ipfire/main/firstsetup_ok
 238         fi
 239
 240         # All done
 241         echo_ok
 242 }
 243
 244 case "${reason}" in
 245         PREINIT)
 246                 # Bring up the interface
 247                 ip link set "${interface}" up
 248                 ;;
 249
 250         BOUND|RENEW|REBIND|REBOOT)
 251                 # Remove any previous IP addresses
 252                 ip addr flush dev "${interface}"
 253
 254                 # Add (or re-add) the new IP address
 255                 ip addr add "${new_ip_address}/${new_subnet_mask}" dev "${interface}"
 256
 257                 # Add the default route
 258                 ip route add default via "${new_routers}"
 259
 260                 # Import AWS configuration
 261                 import_aws_configuration
 262                 ;;
 263
 264         EXPIRE|FAIL|RELEASE|STOP)
 265                 # Remove all IP addresses
 266                 ip addr flush dev "${interface}"
 267                 ;;
 268
 269         *)
 270                 echo "Unhandled reason: ${reason}" >&2
 271                 exit 2
 272                 ;;
 273 esac
 274
 275 # Terminate
 276 exit 0