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 -r setup -s /usr/bin/run-setup -g nobody -m
  90         fi
  91
  92         # Import SSH keys
  93         local user
  94         for user in /root /home/setup; do
  95                 local line
  96                 for line in $(get "public-keys/"); do
  97                         local key_no="${line%=*}"
  98
  99                         local key="$(get public-keys/${key_no}/openssh-key)"
 100                         if [ -n "${key}" ] && ! grep -q "^${key}$" "${user}/.ssh/authorized_keys" 2>/dev/null; then
 101                                 mkdir -p "${user}/.ssh"
 102                                 chmod 700 "${user}/.ssh"
 103
 104                                 echo "${key}" >> "${user}/.ssh/authorized_keys"
 105                                 chmod 600 "${user}/.ssh/authorized_keys"
 106                         fi
 107                 done
 108         done
 109
 110         # Import any DNS server settings
 111         eval $(/usr/local/bin/readhash <(grep -E "^DNS([0-9])=" /var/ipfire/ethernet/settings 2>/dev/null))
 112
 113         # Import network configuration
 114         # After this, no network connectivity will be available from this script due to the
 115         # renaming of the network interfaces for which they have to be shut down
 116         local config_type=1
 117         : > /var/ipfire/ethernet/settings
 118
 119         local mac
 120         for mac in $(get network/interfaces/macs/); do
 121                 # Remove trailing slash
 122                 mac="${mac//\//}"
 123
 124                 local device_number="$(get "network/interfaces/macs/${mac}/device-number")"
 125                 local interface_id="$(get "network/interfaces/macs/${mac}/interface-id")"
 126
 127                 # First IPv4 address
 128                 local ipv4_address="$(get "network/interfaces/macs/${mac}/local-ipv4s" | head -n1)"
 129                 local ipv4_address_num="$(to_integer "${ipv4_address}")"
 130
 131                 # Get VPC subnet
 132                 local vpc="$(get "network/interfaces/macs/${mac}/vpc-ipv4-cidr-block")"
 133                 local vpc_netaddress="${vpc%/*}"
 134                 local vpc_netaddress_num="$(to_integer "${vpc_netaddress}")"
 135
 136                 # Get subnet size
 137                 local subnet="$(get "network/interfaces/macs/${mac}/subnet-ipv4-cidr-block")"
 138
 139                 local prefix="${subnet#*/}"
 140                 local netmask="$(prefix2netmask "${prefix}")"
 141                 local netmask_num="$(to_integer "${netmask}")"
 142
 143                 # Calculate the network and broadcast addresses
 144                 local netaddress="${subnet%/*}"
 145                 local netaddress_num="$(to_integer "${netaddress}")"
 146                 local broadcast="$(to_address $(( ipv4_address_num | (0xffffffff ^ netmask_num) )))"
 147
 148                 case "${device_number}" in
 149                         # RED
 150                         0)
 151                                 local interface_name="red0"
 152
 153                                 # The gateway is always the first IP address in the subnet
 154                                 local gateway="$(to_address $(( netaddress_num + 1 )))"
 155
 156                                 # The AWS internal DNS service is available on the second IP address of the VPC
 157                                 local dns1="$(to_address $(( vpc_netaddress_num + 2 )))"
 158                                 local dns2=
 159
 160                                 (
 161                                         echo "RED_TYPE=STATIC"
 162                                         echo "RED_DEV=${interface_name}"
 163                                         echo "RED_MACADDR=${mac}"
 164                                         echo "RED_DESCRIPTION='${interface_id}'"
 165                                         echo "RED_ADDRESS=${ipv4_address}"
 166                                         echo "RED_NETMASK=${netmask}"
 167                                         echo "RED_NETADDRESS=${netaddress}"
 168                                         echo "RED_BROADCAST=${broadcast}"
 169                                         echo "DEFAULT_GATEWAY=${gateway}"
 170                                         echo "DNS1=${DNS1:-${dns1}}"
 171                                         echo "DNS2=${DNS2:-${dns2}}"
 172                                 ) >> /var/ipfire/ethernet/settings
 173
 174                                 # Import aliases for RED
 175                                 for alias in $(get "network/interfaces/macs/${mac}/local-ipv4s" | tail -n +2); do
 176                                         echo "${alias},on,"
 177                                 done > /var/ipfire/ethernet/aliases
 178                                 ;;
 179
 180                         # GREEN
 181                         1)
 182                                 local interface_name="green0"
 183
 184                                 (
 185                                         echo "GREEN_DEV=${interface_name}"
 186                                         echo "GREEN_MACADDR=${mac}"
 187                                         echo "GREEN_DESCRIPTION='${interface_id}'"
 188                                         echo "GREEN_ADDRESS=${ipv4_address}"
 189                                         echo "GREEN_NETMASK=${netmask}"
 190                                         echo "GREEN_NETADDRESS=${netaddress}"
 191                                         echo "GREEN_BROADCAST=${broadcast}"
 192                                 ) >> /var/ipfire/ethernet/settings
 193                                 ;;
 194
 195                         # ORANGE
 196                         2)
 197                                 local interface_name="orange0"
 198                                 config_type=2
 199
 200                                 (
 201                                         echo "ORANGE_DEV=${interface_name}"
 202                                         echo "ORANGE_MACADDR=${mac}"
 203                                         echo "ORANGE_DESCRIPTION='${interface_id}'"
 204                                         echo "ORANGE_ADDRESS=${ipv4_address}"
 205                                         echo "ORANGE_NETMASK=${netmask}"
 206                                         echo "ORANGE_NETADDRESS=${netaddress}"
 207                                         echo "ORANGE_BROADCAST=${broadcast}"
 208                                 ) >> /var/ipfire/ethernet/settings
 209                                 ;;
 210                 esac
 211
 212                 # Rename interface
 213                 local interface="$(find_interface "${mac}")"
 214
 215                 if [ -n "${interface}" ] && [ -n "${interface_name}" ] && [ "${interface}" != "${interface_name}" ]; then
 216                         ip link set "${interface}" down
 217                         ip link set "${interface}" name "${interface_name}"
 218                 fi
 219         done
 220
 221         # Save CONFIG_TYPE
 222         echo "CONFIG_TYPE=${config_type}" >> /var/ipfire/ethernet/settings
 223
 224         # Actions performed only on the very first start
 225         if [ ! -e "/var/ipfire/main/firstsetup_ok" ]; then
 226                 # Enable SSH
 227                 sed -e "s/ENABLE_SSH=.*/ENABLE_SSH=on/g" -i /var/ipfire/remote/settings
 228
 229                 # Enable SSH key authentication
 230                 sed -e "s/^ENABLE_SSH_KEYS=.*/ENABLE_SSH_KEYS=on/" -i /var/ipfire/remote/settings
 231
 232                 # Apply SSH settings
 233                 /usr/local/bin/sshctrl
 234
 235                 # Mark SSH to start immediately (but not right now)
 236                 touch /var/ipfire/remote/enablessh
 237                 chown nobody:nobody /var/ipfire/remote/enablessh
 238
 239                 # Firewall rules for SSH and WEBIF
 240                 (
 241                         echo "1,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,cust_srv,SSH,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 242                         echo "2,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,TGT_PORT,444,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 243                 ) >> /var/ipfire/firewall/input
 244
 245                 # This script has now completed the first steps of setup
 246                 touch /var/ipfire/main/firstsetup_ok
 247         fi
 248
 249         # All done
 250         echo_ok
 251 }
 252
 253 case "${reason}" in
 254         PREINIT)
 255                 # Bring up the interface
 256                 ip link set "${interface}" up
 257                 ;;
 258
 259         BOUND|RENEW|REBIND|REBOOT)
 260                 # Remove any previous IP addresses
 261                 ip addr flush dev "${interface}"
 262
 263                 # Add (or re-add) the new IP address
 264                 ip addr add "${new_ip_address}/${new_subnet_mask}" dev "${interface}"
 265
 266                 # Add the default route
 267                 ip route add default via "${new_routers}"
 268
 269                 # Import AWS configuration
 270                 import_aws_configuration
 271                 ;;
 272
 273         EXPIRE|FAIL|RELEASE|STOP)
 274                 # Remove all IP addresses
 275                 ip addr flush dev "${interface}"
 276                 ;;
 277
 278         *)
 279                 echo "Unhandled reason: ${reason}" >&2
 280                 exit 2
 281                 ;;
 282 esac
 283
 284 # Terminate
 285 exit 0