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 ${instance_id}..."
  70
  71         # Initialise system settings
  72         local hostname=$(get local-hostname)
  73
  74         # Set hostname
  75         if ! grep -q "^HOSTNAME=" /var/ipfire/main/settings; then
  76                 echo "HOSTNAME=${hostname%%.*}" >> /var/ipfire/main/settings
  77         fi
  78
  79         # Set domainname
  80         if ! grep -q "^DOMAINNAME=" /var/ipfire/main/settings; then
  81                 echo "DOMAINNAME=${hostname#*.}" >> /var/ipfire/main/settings
  82         fi
  83
  84         # Import any DNS server settings
  85         eval $(/usr/local/bin/readhash <(grep -E "^DNS([0-9])=" /var/ipfire/ethernet/settings 2>/dev/null))
  86
  87         # Import network configuration
  88         local config_type=1
  89         : > /var/ipfire/ethernet/settings
  90
  91         local mac
  92         for mac in $(get network/interfaces/macs/); do
  93                 # Remove trailing slash
  94                 mac="${mac//\//}"
  95
  96                 local device_number="$(get "network/interfaces/macs/${mac}/device-number")"
  97                 local interface_id="$(get "network/interfaces/macs/${mac}/interface-id")"
  98
  99                 # First IPv4 address
 100                 local ipv4_address="$(get "network/interfaces/macs/${mac}/local-ipv4s" | head -n1)"
 101                 local ipv4_address_num="$(to_integer "${ipv4_address}")"
 102
 103                 # Get VPC subnet
 104                 local vpc="$(get "network/interfaces/macs/${mac}/vpc-ipv4-cidr-block")"
 105                 local vpc_netaddress="${vpc%/*}"
 106                 local vpc_netaddress_num="$(to_integer "${vpc_netaddress}")"
 107
 108                 # Get subnet size
 109                 local subnet="$(get "network/interfaces/macs/${mac}/subnet-ipv4-cidr-block")"
 110
 111                 local prefix="${subnet#*/}"
 112                 local netmask="$(prefix2netmask "${prefix}")"
 113                 local netmask_num="$(to_integer "${netmask}")"
 114
 115                 # Calculate the network and broadcast addresses
 116                 local netaddress="${subnet%/*}"
 117                 local netaddress_num="$(to_integer "${netaddress}")"
 118                 local broadcast="$(to_address $(( ipv4_address_num | (0xffffffff ^ netmask_num) )))"
 119
 120                 case "${device_number}" in
 121                         # RED
 122                         0)
 123                                 local interface_name="red0"
 124
 125                                 # The gateway is always the first IP address in the subnet
 126                                 local gateway="$(to_address $(( netaddress_num + 1 )))"
 127
 128                                 # The AWS internal DNS service is available on the second IP address of the VPC
 129                                 local dns1="$(to_address $(( vpc_netaddress_num + 2 )))"
 130                                 local dns2=
 131
 132                                 (
 133                                         echo "RED_TYPE=STATIC"
 134                                         echo "RED_DEV=${interface_name}"
 135                                         echo "RED_MACADDR=${mac}"
 136                                         echo "RED_DESCRIPTION='${interface_id}'"
 137                                         echo "RED_ADDRESS=${ipv4_address}"
 138                                         echo "RED_NETMASK=${netmask}"
 139                                         echo "RED_NETADDRESS=${netaddress}"
 140                                         echo "RED_BROADCAST=${broadcast}"
 141                                         echo "DEFAULT_GATEWAY=${gateway}"
 142                                         echo "DNS1=${DNS1:-${dns1}}"
 143                                         echo "DNS2=${DNS2:-${dns2}}"
 144                                 ) >> /var/ipfire/ethernet/settings
 145
 146                                 # Import aliases for RED
 147                                 for alias in $(get "network/interfaces/macs/${mac}/local-ipv4s" | tail -n +2); do
 148                                         echo "${alias},on,"
 149                                 done > /var/ipfire/ethernet/aliases
 150                                 ;;
 151
 152                         # GREEN
 153                         1)
 154                                 local interface_name="green0"
 155
 156                                 (
 157                                         echo "GREEN_DEV=${interface_name}"
 158                                         echo "GREEN_MACADDR=${mac}"
 159                                         echo "GREEN_DESCRIPTION='${interface_id}'"
 160                                         echo "GREEN_ADDRESS=${ipv4_address}"
 161                                         echo "GREEN_NETMASK=${netmask}"
 162                                         echo "GREEN_NETADDRESS=${netaddress}"
 163                                         echo "GREEN_BROADCAST=${broadcast}"
 164                                 ) >> /var/ipfire/ethernet/settings
 165                                 ;;
 166
 167                         # ORANGE
 168                         2)
 169                                 local interface_name="orange0"
 170                                 config_type=2
 171
 172                                 (
 173                                         echo "ORANGE_DEV=${interface_name}"
 174                                         echo "ORANGE_MACADDR=${mac}"
 175                                         echo "ORANGE_DESCRIPTION='${interface_id}'"
 176                                         echo "ORANGE_ADDRESS=${ipv4_address}"
 177                                         echo "ORANGE_NETMASK=${netmask}"
 178                                         echo "ORANGE_NETADDRESS=${netaddress}"
 179                                         echo "ORANGE_BROADCAST=${broadcast}"
 180                                 ) >> /var/ipfire/ethernet/settings
 181                                 ;;
 182                 esac
 183
 184                 # Rename interface
 185                 local interface="$(find_interface "${mac}")"
 186
 187                 if [ -n "${interface}" ] && [ -n "${interface_name}" ]; then
 188                         ip link set "${interface}" down
 189                         ip link set "${interface}" name "${interface_name}"
 190                 fi
 191         done
 192
 193         # Save CONFIG_TYPE
 194         echo "CONFIG_TYPE=${config_type}" >> /var/ipfire/ethernet/settings
 195
 196         # Import SSH keys
 197         local line
 198         for line in $(get "public-keys/"); do
 199                 local key_no="${line%=*}"
 200
 201                 local key="$(get public-keys/${key_no}/openssh-key)"
 202                 if [ -n "${key}" ] && ! grep -q "^${key}$" /root/.ssh/authorized_keys 2>/dev/null; then
 203                         mkdir -p /root/.ssh
 204                         chmod 700 /root/.ssh
 205
 206                         echo "${key}" >> /root/.ssh/authorized_keys
 207                         chmod 600 /root/.ssh/authorized_keys
 208                 fi
 209         done
 210
 211         # Actions performed only on the very first start
 212         if [ ! -e "/var/ipfire/main/firstsetup_ok" ]; then
 213                 # Enable SSH
 214                 sed -e "s/ENABLE_SSH=.*/ENABLE_SSH=on/g" -i /var/ipfire/remote/settings
 215
 216                 touch /var/ipfire/remote/enablessh
 217                 chown nobody:nobody /var/ipfire/remote/enablessh
 218
 219                 # Enable SSH key authentication
 220                 sed -e "s/^ENABLE_SSH_KEYS=.*/ENABLE_SSH_KEYS=on/" -i /var/ipfire/remote/settings
 221
 222                 # Apply SSH settings
 223                 /usr/local/bin/sshctrl
 224
 225                 # Firewall rules for SSH and WEBIF
 226                 (
 227                         echo "1,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,cust_srv,SSH,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 228                         echo "2,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,TGT_PORT,444,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 229                 ) >> /var/ipfire/firewall/input
 230
 231                 # This script has now completed the first steps of setup
 232                 touch /var/ipfire/main/firstsetup_ok
 233         fi
 234
 235         # All done
 236         echo_ok
 237
 238         # Restart udev to rename network interfaces
 239         /etc/init.d/udev restart
 240 }
 241
 242 case "${reason}" in
 243         PREINIT)
 244                 # Bring up the interface
 245                 ip link set "${interface}" up
 246                 ;;
 247
 248         BOUND|RENEW|REBIND|REBOOT)
 249                 # Remove any previous IP addresses
 250                 ip addr flush dev "${interface}"
 251
 252                 # Add (or re-add) the new IP address
 253                 ip addr add "${new_ip_address}/${new_subnet_mask}" dev "${interface}"
 254
 255                 # Add the default route
 256                 ip route add default via "${new_routers}"
 257
 258                 # Import AWS configuration
 259                 import_aws_configuration
 260                 ;;
 261
 262         EXPIRE|FAIL|RELEASE|STOP)
 263                 # Remove all IP addresses
 264                 ip addr flush dev "${interface}"
 265                 ;;
 266
 267         *)
 268                 echo "Unhandled reason: ${reason}" >&2
 269                 exit 2
 270                 ;;
 271 esac
 272
 273 # Terminate
 274 exit 0