mirror of
https://github.com/vincentmli/bpfire.git
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cloud-init: Import experimental configuration script for Azure
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
This commit is contained in:
Michael Tremer
326
src/initscripts/helper/azure-setup
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326
src/initscripts/helper/azure-setup
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@@ -0,0 +1,326 @@
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#!/bin/bash
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. /etc/sysconfig/rc
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. ${rc_functions}
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# Set PATH to find our own executables
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export PATH=/usr/local/sbin:/usr/local/bin:${PATH}
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get() {
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local file="${1}"
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wget -qO - --header="Metadata:true" "http://169.254.169.254/metadata/instance/${file}?api-version=2019-06-01&format=text"
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}
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format_mac() {
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local mac="${1,,}"
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echo "${mac:0:2}:${mac:2:2}:${mac:4:2}:${mac:6:2}:${mac:8:2}"
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}
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to_address() {
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local n="${1}"
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local o1=$(( (n & 0xff000000) >> 24 ))
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local o2=$(( (n & 0xff0000) >> 16 ))
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local o3=$(( (n & 0xff00) >> 8 ))
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local o4=$(( (n & 0xff) ))
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printf "%d.%d.%d.%d\n" "${o1}" "${o2}" "${o3}" "${o4}"
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}
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to_integer() {
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local address="${1}"
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local integer=0
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local i
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for i in ${address//\./ }; do
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integer=$(( (integer << 8) + i ))
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done
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printf "%d\n" "${integer}"
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}
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prefix2netmask() {
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local prefix=${1}
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local zeros=$(( 32 - prefix ))
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local netmask=0
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local i
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for (( i=0; i<${zeros}; i++ )); do
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netmask=$(( (netmask << 1) ^ 1 ))
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done
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to_address "$(( netmask ^ 0xffffffff ))"
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}
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import_azure_configuration() {
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local instance_id="$(get compute/vmId)"
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boot_mesg "Importing Microsoft Azure configuration for instance ${instance_id}..."
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# Store instance ID
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echo "${instance_id}" > /var/run/azure-instance-id
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# Initialise system settings
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local hostname=$(get compute/name)
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# Set hostname
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if ! grep -q "^HOSTNAME=" /var/ipfire/main/settings; then
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echo "HOSTNAME=${hostname%%.*}" >> /var/ipfire/main/settings
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fi
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# Set domainname
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if ! grep -q "^DOMAINNAME=" /var/ipfire/main/settings; then
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echo "DOMAINNAME=${hostname#*.}" >> /var/ipfire/main/settings
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fi
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# Import SSH keys for setup user
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local line
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for line in $(get "compute/publicKeys/"); do
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# Remove trailing slash
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local key_no="${line//\//}"
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# Get the path where this key should be installed
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local path="$(get "compute/publicKeys/${key_no}/path")"
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local key="$(get "compute/publicKeys/${key_no}/keyData")"
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local user
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if [[ "${path}" =~ ^/home ]]; then
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user="${path:6}"
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user="${user%%/*}"
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else
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# Cannot process this user
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continue
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fi
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# Create user if it does not exist
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if ! getent passwd "${user}" &>/dev/null; then
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useradd "${user}" -s /usr/bin/run-setup -g nobody -m
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# Unlock the account
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usermod -p "x" "${user}"
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fi
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if [ -n "${key}" ] && ! grep -q "^${key}$" "${path}" 2>/dev/null; then
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local dir="$(dirname "${path}")"
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# Install directory
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mkdir -p "${dir}"
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chmod 700 "${dir}"
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chown "${user}.nobody" "${dir}"
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# Install the key
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echo "${key}" >> "${path}"
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chmod 600 "${path}"
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chown "${user}.nobody" "${path}"
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fi
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done
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# Download the user-data script only on the first boot
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if [ ! -e "/var/ipfire/main/firstsetup_ok" ]; then
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# Download user-data
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local user_data="$(get customData)"
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# Save user-data script to be executed later
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if [ "${user_data:0:2}" = "#!" ]; then
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echo "${user_data}" > /tmp/azure-user-data.script
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chmod 700 /tmp/azure-user-data.script
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# Run the user-data script
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local now="$(date -u +"%s")"
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/tmp/azure-user-data.script &>/var/log/user-data.log.${now}
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# Delete the script right away
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rm /tmp/azure-user-data.script
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fi
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fi
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# Import any DNS server settings
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eval $(/usr/local/bin/readhash <(grep -E "^DNS([0-9])=" /var/ipfire/ethernet/settings 2>/dev/null))
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# Import network configuration
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# After this, no network connectivity will be available from this script due to the
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# renaming of the network interfaces for which they have to be shut down
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local config_type=1
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: > /var/ipfire/ethernet/settings
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local device_number
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for device_number in $(get network/interface); do
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# Remove trailing slash
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device_number="${device_number//\//}"
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local mac="$(get "network/interface/${device_number}/macAddress")"
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mac="$(format_mac "${mac}")"
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# First IPv4 address
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local ipv4_address="$(get "network/interface/${device_number}/ipv4/ipAddress/0/privateIpAddress")"
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local ipv4_address_num="$(to_integer "${ipv4_address}")"
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local prefix="$(get "network/interface/${device_number}/ipv4/subnet/0/prefix")"
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local netmask="$(prefix2netmask "${prefix}")"
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local netmask_num="$(to_integer "${netmask}")"
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# Calculate the network and broadcast addresses
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local netaddress="$(get "network/interface/${device_number}/ipv4/subnet/0/address")"
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local netaddress_num="$(to_integer "${netaddress}")"
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local broadcast="$(to_address $(( ipv4_address_num | (0xffffffff ^ netmask_num) )))"
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case "${device_number}" in
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# RED
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0)
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local interface_name="red0"
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# The gateway is always the first IP address in the subnet
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local gateway="$(to_address $(( netaddress_num + 1 )))"
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# Microsoft uses a special IP address for DNS
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# https://blogs.msdn.microsoft.com/mast/2015/05/18/what-is-the-ip-address-168-63-129-16/
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local dns1="168.63.129.16"
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local dns2=
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(
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echo "RED_TYPE=STATIC"
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echo "RED_DEV=${interface_name}"
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echo "RED_MACADDR=${mac}"
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echo "RED_DESCRIPTION='${interface_id}'"
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echo "RED_ADDRESS=${ipv4_address}"
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echo "RED_NETMASK=${netmask}"
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echo "RED_NETADDRESS=${netaddress}"
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echo "RED_BROADCAST=${broadcast}"
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echo "DEFAULT_GATEWAY=${gateway}"
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echo "DNS1=${DNS1:-${dns1}}"
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echo "DNS2=${DNS2:-${dns2}}"
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) >> /var/ipfire/ethernet/settings
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# Import aliases for RED
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local address_no
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for address_no in $(get "network/interface/0/ipv4/ipAddress"); do
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# Remove trailing slash
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address_no="${address_no//\//}"
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# Skip the first address
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[ "${address_no}" = "0" ] && continue
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# Fetch the IP address
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local alias="$(get "network/interface/0/ipv4/ipAddress/${address_no}/privateIpAddress")"
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echo "${alias},on,"
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done > /var/ipfire/ethernet/aliases
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;;
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# GREEN
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1)
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local interface_name="green0"
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(
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echo "GREEN_DEV=${interface_name}"
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echo "GREEN_MACADDR=${mac}"
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echo "GREEN_DESCRIPTION='${interface_id}'"
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echo "GREEN_ADDRESS=${ipv4_address}"
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echo "GREEN_NETMASK=${netmask}"
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echo "GREEN_NETADDRESS=${netaddress}"
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echo "GREEN_BROADCAST=${broadcast}"
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) >> /var/ipfire/ethernet/settings
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;;
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# ORANGE
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2)
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local interface_name="orange0"
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config_type=2
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(
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echo "ORANGE_DEV=${interface_name}"
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echo "ORANGE_MACADDR=${mac}"
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echo "ORANGE_DESCRIPTION='${interface_id}'"
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echo "ORANGE_ADDRESS=${ipv4_address}"
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echo "ORANGE_NETMASK=${netmask}"
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echo "ORANGE_NETADDRESS=${netaddress}"
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echo "ORANGE_BROADCAST=${broadcast}"
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) >> /var/ipfire/ethernet/settings
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;;
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esac
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done
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# Save CONFIG_TYPE
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echo "CONFIG_TYPE=${config_type}" >> /var/ipfire/ethernet/settings
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# Actions performed only on the very first start
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if [ ! -e "/var/ipfire/main/firstsetup_ok" ]; then
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# Enable SSH
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sed -e "s/ENABLE_SSH=.*/ENABLE_SSH=on/g" -i /var/ipfire/remote/settings
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# Disable SSH password authentication
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sed -e "s/^ENABLE_SSH_PASSWORDS=.*/ENABLE_SSH_PASSWORDS=off/" -i /var/ipfire/remote/settings
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# Enable SSH key authentication
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sed -e "s/^ENABLE_SSH_KEYS=.*/ENABLE_SSH_KEYS=on/" -i /var/ipfire/remote/settings
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# Apply SSH settings
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/usr/local/bin/sshctrl
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# Mark SSH to start immediately (but not right now)
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touch /var/ipfire/remote/enablessh
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chown nobody:nobody /var/ipfire/remote/enablessh
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# Firewall rules for SSH and WEBIF
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(
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echo "1,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,cust_srv,SSH,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
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echo "2,ACCEPT,INPUTFW,ON,std_net_src,ALL,ipfire,RED1,,TCP,,,ON,,,TGT_PORT,444,,,,,,,,,,,00:00,00:00,,AUTO,,dnat,,,,,second"
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) >> /var/ipfire/firewall/input
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# This script has now completed the first steps of setup
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touch /var/ipfire/main/firstsetup_ok
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fi
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# All done
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echo_ok
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}
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case "${reason}" in
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PREINIT)
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# Bring up the interface
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ip link set "${interface}" up
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;;
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BOUND|RENEW|REBIND|REBOOT)
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# Remove any previous IP addresses
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ip addr flush dev "${interface}"
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# Add (or re-add) the new IP address
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ip addr add "${new_ip_address}/${new_subnet_mask}" dev "${interface}"
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# Add the default route
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ip route add default via "${new_routers}"
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# Setup DNS
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for domain_name_server in ${new_domain_name_servers}; do
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echo "nameserver ${domain_name_server}"
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done > /etc/resolv.conf
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# The system is online now
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touch /var/ipfire/red/active
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# Import Azure configuration
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import_azure_configuration
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;;
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EXPIRE|FAIL|RELEASE|STOP)
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# The system is no longer online
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rm -f /var/ipfire/red/active
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# Remove all IP addresses
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ip addr flush dev "${interface}"
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# Shut down the interface
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ip link set "${interface}" down
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;;
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*)
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echo "Unhandled reason: ${reason}" >&2
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exit 2
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;;
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esac
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# Terminate
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exit 0
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