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