src/initscripts/helper/aws-setup

   1 #!/bin/bash
   2
   3 . /etc/sysconfig/rc
   4 . ${rc_functions}
   5
   6 # Set PATH to find our own executables
   7 export PATH=/usr/local/sbin:/usr/local/bin:${PATH}
   8
   9 # AWS supports an MTU of up to 9001 bytes
  10 DEFAULT_MTU=9001
  11
  12 get() {
  13         local file="${1}"
  14
  15         wget -qO - "http://169.254.169.254/latest/${file}"
  16 }
  17
  18 to_address() {
  19         local n="${1}"
  20
  21         local o1=$(( (n & 0xff000000) >> 24 ))
  22         local o2=$(( (n & 0xff0000) >> 16 ))
  23         local o3=$(( (n & 0xff00) >> 8 ))
  24         local o4=$(( (n & 0xff) ))
  25
  26         printf "%d.%d.%d.%d\n" "${o1}" "${o2}" "${o3}" "${o4}"
  27 }
  28
  29 to_integer() {
  30         local address="${1}"
  31
  32         local integer=0
  33
  34         local i
  35         for i in ${address//\./ }; do
  36                 integer=$(( (integer << 8) + i ))
  37         done
  38
  39         printf "%d\n" "${integer}"
  40 }
  41
  42 prefix2netmask() {
  43         local prefix=${1}
  44
  45         local zeros=$(( 32 - prefix ))
  46         local netmask=0
  47
  48         local i
  49         for (( i=0; i<${zeros}; i++ )); do
  50                 netmask=$(( (netmask << 1) ^ 1 ))
  51         done
  52
  53         to_address "$(( netmask ^ 0xffffffff ))"
  54 }
  55
  56 import_aws_configuration() {
  57         local instance_id="$(get meta-data/instance-id)"
  58
  59         boot_mesg "Importing AWS configuration for instance ${instance_id}..."
  60
  61         # Store instance ID
  62         echo "${instance_id}" > /var/run/aws-instance-id
  63
  64         # Initialise system settings
  65         local hostname=$(get meta-data/local-hostname)
  66
  67         # Set hostname
  68         if ! grep -q "^HOSTNAME=" /var/ipfire/main/settings; then
  69                 echo "HOSTNAME=${hostname%%.*}" >> /var/ipfire/main/settings
  70         fi
  71
  72         # Set domainname
  73         if ! grep -q "^DOMAINNAME=" /var/ipfire/main/settings; then
  74                 echo "DOMAINNAME=${hostname#*.}" >> /var/ipfire/main/settings
  75         fi
  76
  77         # Create setup user
  78         if ! getent passwd setup &>/dev/null; then
  79                 useradd setup -s /usr/bin/run-setup -g nobody -m
  80
  81                 # Unlock the account
  82                 usermod -p "x" setup
  83         fi
  84
  85         # Import SSH keys for setup user
  86         local line
  87         for line in $(get "meta-data/public-keys/"); do
  88                 local key_no="${line%=*}"
  89
  90                 local key="$(get meta-data/public-keys/${key_no}/openssh-key)"
  91                 if [ -n "${key}" ] && ! grep -q "^${key}$" "/home/setup/.ssh/authorized_keys" 2>/dev/null; then
  92                         mkdir -p "/home/setup/.ssh"
  93                         chmod 700 "/home/setup/.ssh"
  94                         chown setup.nobody "/home/setup/.ssh"
  95
  96                         echo "${key}" >> "/home/setup/.ssh/authorized_keys"
  97                         chmod 600 "/home/setup/.ssh/authorized_keys"
  98                         chown setup.nobody "/home/setup/.ssh/authorized_keys"
  99                 fi
 100         done
 101
 102         # Download the user-data script only on the first boot
 103         if [ ! -e "/var/ipfire/main/firstsetup_ok" ]; then
 104                 # Download user-data
 105                 local user_data="$(get user-data)"
 106
 107                 # Save user-data script to be executed later
 108                 if [ "${user_data:0:2}" = "#!" ]; then
 109                         echo "${user_data}" > /tmp/aws-user-data.script
 110                         chmod 700 /tmp/aws-user-data.script
 111
 112                         # Run the user-data script
 113                         local now="$(date -u +"%s")"
 114                         /tmp/aws-user-data.script &>/var/log/user-data.log.${now}
 115
 116                         # Delete the script right away
 117                         rm /tmp/aws-user-data.script
 118                 fi
 119         fi
 120
 121         # Import network configuration
 122         # After this, no network connectivity will be available from this script due to the
 123         # renaming of the network interfaces for which they have to be shut down
 124         local config_type=1
 125         : > /var/ipfire/ethernet/settings
 126
 127         local mac
 128         for mac in $(get meta-data/network/interfaces/macs/); do
 129                 # Remove trailing slash
 130                 mac="${mac//\//}"
 131
 132                 local device_number="$(get "meta-data/network/interfaces/macs/${mac}/device-number")"
 133                 local interface_id="$(get "meta-data/network/interfaces/macs/${mac}/interface-id")"
 134
 135                 # First IPv4 address
 136                 local ipv4_address="$(get "meta-data/network/interfaces/macs/${mac}/local-ipv4s" | head -n1)"
 137                 local ipv4_address_num="$(to_integer "${ipv4_address}")"
 138
 139                 # Get VPC subnet
 140                 local vpc="$(get "meta-data/network/interfaces/macs/${mac}/vpc-ipv4-cidr-block")"
 141                 local vpc_netaddress="${vpc%/*}"
 142                 local vpc_netaddress_num="$(to_integer "${vpc_netaddress}")"
 143
 144                 # Get subnet size
 145                 local subnet="$(get "meta-data/network/interfaces/macs/${mac}/subnet-ipv4-cidr-block")"
 146
 147                 local prefix="${subnet#*/}"
 148                 local netmask="$(prefix2netmask "${prefix}")"
 149
 150                 # Calculate the network and broadcast addresses
 151                 local netaddress="${subnet%/*}"
 152                 local netaddress_num="$(to_integer "${netaddress}")"
 153
 154                 case "${device_number}" in
 155                         # RED
 156                         0)
 157                                 local interface_name="red0"
 158
 159                                 # The gateway is always the first IP address in the subnet
 160                                 local gateway="$(to_address $(( netaddress_num + 1 )))"
 161
 162                                 (
 163                                         echo "RED_TYPE=STATIC"
 164                                         echo "RED_DEV=${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=${netaddress}"
 170                                         echo "RED_MTU=1500"
 171                                         echo "DEFAULT_GATEWAY=${gateway}"
 172                                 ) >> /var/ipfire/ethernet/settings
 173
 174                                 # Import aliases for RED
 175                                 for alias in $(get "meta-data/network/interfaces/macs/${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=${netaddress}"
 191                                         echo "GREEN_MTU=${DEFAULT_MTU}"
 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_MTU=${DEFAULT_MTU}"
 208                                 ) >> /var/ipfire/ethernet/settings
 209                                 ;;
 210                 esac
 211         done
 212
 213         # Save CONFIG_TYPE
 214         echo "CONFIG_TYPE=${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                 # Disable using ISP nameservers
 219                 sed -e "s/^USE_ISP_NAMESERVERS=.*/USE_ISP_NAMESERVERS=off/" -i /var/ipfire/dns/settings
 220
 221                 # Enable SSH
 222                 sed -e "s/ENABLE_SSH=.*/ENABLE_SSH=on/g" -i /var/ipfire/remote/settings
 223
 224                 # Disable SSH password authentication
 225                 sed -e "s/^ENABLE_SSH_PASSWORDS=.*/ENABLE_SSH_PASSWORDS=off/" -i /var/ipfire/remote/settings
 226
 227                 # Enable SSH key authentication
 228                 sed -e "s/^ENABLE_SSH_KEYS=.*/ENABLE_SSH_KEYS=on/" -i /var/ipfire/remote/settings
 229
 230                 # Apply SSH settings
 231                 /usr/local/bin/sshctrl
 232
 233                 # Mark SSH to start immediately (but not right now)
 234                 touch /var/ipfire/remote/enablessh
 235                 chown nobody:nobody /var/ipfire/remote/enablessh
 236
 237                 # Firewall rules for SSH and WEBIF
 238                 (
 239                         echo "1,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,cust_srv,SSH,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 240                         echo "2,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,TGT_PORT,444,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
 241                 ) >> /var/ipfire/firewall/input
 242
 243                 # This script has now completed the first steps of setup
 244                 touch /var/ipfire/main/firstsetup_ok
 245         fi
 246
 247         # All done
 248         echo_ok
 249 }
 250
 251 case "${reason}" in
 252         PREINIT)
 253                 # Bring up the interface
 254                 ip link set "${interface}" up
 255                 ;;
 256
 257         BOUND|RENEW|REBIND|REBOOT)
 258                 # Remove any previous IP addresses
 259                 ip addr flush dev "${interface}"
 260
 261                 # Add (or re-add) the new IP address
 262                 ip addr add "${new_ip_address}/${new_subnet_mask}" dev "${interface}"
 263
 264                 # Add the default route
 265                 ip route add default via "${new_routers}"
 266
 267                 # Setup DNS
 268                 for domain_name_server in ${new_domain_name_servers}; do
 269                         echo "nameserver ${domain_name_server}"
 270                 done > /etc/resolv.conf
 271
 272                 # The system is online now
 273                 touch /var/ipfire/red/active
 274
 275                 # Import AWS configuration
 276                 import_aws_configuration
 277                 ;;
 278
 279         EXPIRE|FAIL|RELEASE|STOP)
 280                 # The system is no longer online
 281                 rm -f /var/ipfire/red/active
 282
 283                 # Remove all IP addresses
 284                 ip addr flush dev "${interface}"
 285
 286                 # Shut down the interface
 287                 ip link set "${interface}" down
 288                 ;;
 289
 290         *)
 291                 echo "Unhandled reason: ${reason}" >&2
 292                 exit 2
 293                 ;;
 294 esac
 295
 296 # Terminate
 297 exit 0