Add adaptive router VM/interface scaling and local delivery integrity tests
Terraform now provisions router_count IaaS Router VMs (default 2, no longer hardcoded to router1/router2), each with 1 public + private_interface_count isolated private interfaces (no shared LAN or VRRP between routers). Both counts scale via Terraform variables and TF_VAR_* environment variables. The post-install script became a Terraform template that matches interfaces to their expected subnet by CIDR instead of a fragile "first private IP" heuristic. Added an offline pytest suite (terraform/tests/) that checks the delivery's internal consistency and runs real terraform init/validate against the actual vkcs provider schema via a project-local filesystem mirror (provider binary fetched from its GitHub releases, bypassing the region-blocked HashiCorp registry) - no cloud credentials or API calls involved. terraform/versions.tf now declares the previously-missing required_providers block. Ansible (inventory.ini, base/frr_router/keepalived roles) still assumes the old 2-router/2-NIC/VRRP topology and is not yet adapted - documented as a follow-up, not addressed here. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011hXR2ftXZZhJ4Y3XuSoR8r
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@@ -0,0 +1,497 @@
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#!/bin/bash
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set -e
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log() {
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a /var/log/network-config.log
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}
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log "Starting network configuration..."
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# Validate required commands exist
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for cmd in ip netplan systemctl; do
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if ! command -v "$cmd" &> /dev/null; then
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log "ERROR: Required command '$cmd' is not available"
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exit 1
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fi
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done
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# Validate directories exist
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if [ ! -d "/etc/netplan" ]; then
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log "ERROR: /etc/netplan directory does not exist"
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exit 1
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fi
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if [ ! -d "/sys/class/net" ]; then
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log "ERROR: /sys/class/net directory does not exist"
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exit 1
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fi
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# Enhanced function to check if IP is in private subnet (RFC 1918)
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is_private_ip() {
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local ip="$1"
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local clean_ip=$(echo "$ip" | cut -d'/' -f1) # Remove subnet mask if present
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# Check RFC 1918 private ranges:
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# 10.0.0.0/8 (10.0.0.0 - 10.255.255.255)
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# 172.16.0.0/12 (172.16.0.0 - 172.31.255.255)
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# 192.168.0.0/16 (192.168.0.0 - 192.168.255.255)
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if [[ $clean_ip =~ ^10\. ]]; then
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return 0 # 10.0.0.0/8
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elif [[ $clean_ip =~ ^172\.(1[6-9]|2[0-9]|3[0-1])\. ]]; then
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return 0 # 172.16.0.0/12
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elif [[ $clean_ip =~ ^192\.168\. ]]; then
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return 0 # 192.168.0.0/16
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else
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return 1 # Is public IP
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fi
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}
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# Function to convert CIDR to netmask
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cidr_to_netmask() {
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local cidr="$1"
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# Input validation
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if [[ ! $cidr =~ ^[0-9]+$ ]] || [ "$cidr" -lt 0 ] || [ "$cidr" -gt 32 ]; then
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echo "Error: CIDR must be a number between 0 and 32" >&2
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return 1
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fi
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local netmask=""
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local full_octets=$((cidr / 8))
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local remaining_bits=$((cidr % 8))
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local partial_octet=0
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# Calculate partial octet if there are remaining bits
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if [ "$remaining_bits" -gt 0 ]; then
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partial_octet=$((256 - (256 >> remaining_bits)))
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fi
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for ((i=0; i<4; i++)); do
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if [ "$i" -lt "$full_octets" ]; then
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netmask="$${netmask}255"
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elif [ "$i" -eq "$full_octets" ] && [ "$remaining_bits" -gt 0 ]; then
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netmask="$${netmask}$${partial_octet}"
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else
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netmask="$${netmask}0"
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fi
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if [ "$i" -lt 3 ]; then
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netmask="$${netmask}."
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fi
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done
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echo "$netmask"
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}
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# Function to convert netmask to CIDR
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netmask_to_cidr() {
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local netmask="$1"
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local cidr=0
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# Use -a for array, not -o
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IFS='.' read -ra octets <<< "$netmask"
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for octet in "$${octets[@]}"; do
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case $octet in
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255) cidr=$((cidr + 8)) ;;
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254) cidr=$((cidr + 7)) ;;
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252) cidr=$((cidr + 6)) ;;
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248) cidr=$((cidr + 5)) ;;
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240) cidr=$((cidr + 4)) ;;
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224) cidr=$((cidr + 3)) ;;
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192) cidr=$((cidr + 2)) ;;
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128) cidr=$((cidr + 1)) ;;
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0) ;;
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*) echo "32"; return 1 ;; # Invalid netmask, default to /32
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esac
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done
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echo "$cidr"
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}
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# Function to extract IP, netmask, and CIDR from CIDR notation
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get_ip_netmask_cidr() {
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local cidr_ip="$1"
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local ip=$(echo "$cidr_ip" | cut -d'/' -f1)
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local cidr_part=$(echo "$cidr_ip" | cut -d'/' -f2)
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local netmask=""
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local cidr=""
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if [[ $cidr_part =~ ^[0-9]{1,2}$ ]]; then
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# CIDR notation (e.g., /24)
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cidr="$cidr_part"
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netmask=$(cidr_to_netmask "$cidr")
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elif [[ $cidr_part =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
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# Already in netmask format
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netmask="$cidr_part"
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cidr=$(netmask_to_cidr "$netmask")
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else
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# Default to /32 if no valid netmask found
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cidr="32"
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netmask="255.255.255.255"
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fi
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echo "$ip,$netmask,$cidr"
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}
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# Function to extract the first private IPv4 address, netmask, and CIDR from an interface
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get_private_ip_netmask_cidr() {
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local interface="$1"
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local ip_addrs=$(ip addr show "$interface" 2>/dev/null | grep 'inet ' | grep -v '127.0.0.1' | awk '{print $2}')
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if [ -n "$ip_addrs" ]; then
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while IFS= read -r ip; do
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if [ -n "$ip" ] && is_private_ip "$ip"; then
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# Return IP, netmask, and CIDR
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get_ip_netmask_cidr "$ip"
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return 0
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fi
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done <<< "$ip_addrs"
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fi
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return 1
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}
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# Function to extract the first public IPv4 address, netmask, and CIDR from an interface
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get_public_ip_netmask_cidr() {
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local interface="$1"
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local ip_addrs=$(ip addr show "$interface" 2>/dev/null | grep 'inet ' | grep -v '127.0.0.1' | awk '{print $2}')
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if [ -n "$ip_addrs" ]; then
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while IFS= read -r ip; do
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if [ -n "$ip" ] && ! is_private_ip "$ip"; then
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# Return IP, netmask, and CIDR
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get_ip_netmask_cidr "$ip"
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return 0
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fi
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done <<< "$ip_addrs"
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fi
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return 1
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}
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# Function to get default gateway for an interface
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get_interface_gateway() {
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local interface="$1"
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# Try to get gateway from route table for the specific interface
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local gateway=$(ip route show dev "$interface" 2>/dev/null | grep '^default via' | awk '{print $3}' | head -n1)
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if [ -n "$gateway" ]; then
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echo "$gateway"
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return 0
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fi
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# Fallback: get default gateway from main route table
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gateway=$(ip route show 2>/dev/null | grep '^default via' | awk '{print $3}' | head -n1)
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if [ -n "$gateway" ]; then
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echo "$gateway"
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return 0
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fi
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return 1
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}
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# Enhanced function to check if interface has private IP
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has_private_ip() {
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local interface="$1"
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local ip_addrs=$(ip addr show "$interface" 2>/dev/null | grep 'inet ' | grep -v '127.0.0.1' | awk '{print $2}')
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if [ -n "$ip_addrs" ]; then
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while IFS= read -r ip; do
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if [ -n "$ip" ] && is_private_ip "$ip"; then
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return 0 # Has at least one private IP
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fi
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done <<< "$ip_addrs"
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fi
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return 1 # No private IP
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}
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# Convert a dotted IPv4 address to a 32-bit integer
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ip_to_int() {
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local ip="$1"
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local a b c d
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IFS='.' read -r a b c d <<< "$ip"
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echo $(( (a << 24) | (b << 16) | (c << 8) | d ))
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}
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# Check whether IPv4 address $1 falls inside CIDR network $2 (e.g. 10.90.0.8/29)
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ip_in_cidr() {
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local ip="$1"
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local cidr="$2"
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local net="$${cidr%/*}"
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local prefix="$${cidr#*/}"
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local ip_int net_int mask
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ip_int=$(ip_to_int "$ip")
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net_int=$(ip_to_int "$net")
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if [ "$prefix" -eq 0 ]; then
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mask=0
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else
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mask=$(( (0xFFFFFFFF << (32 - prefix)) & 0xFFFFFFFF ))
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fi
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[ $(( ip_int & mask )) -eq $(( net_int & mask )) ]
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}
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# Expected private interfaces, injected by Terraform: one CIDR + target
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# ethX name per entry. Populated below via a template directive.
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PRIV_TARGETS=()
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%{ for pi in private_interfaces ~}
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PRIV_TARGETS+=("${pi.cidr}|${pi.name}")
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%{ endfor ~}
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# Identify private and WAN interfaces
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declare -A PRIV_IFACE # target name -> interface
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declare -A PRIV_MAC # target name -> MAC
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declare -A PRIV_IPv4 # target name -> IP
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declare -A PRIV_NETMASK # target name -> netmask
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declare -A PRIV_CIDR # target name -> CIDR prefix length
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MATCHED_PRIV_IFACES=""
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WAN_IFACE=""
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WAN_MAC=""
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WAN_IFACE_IPv4=""
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WAN_NETMASK=""
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WAN_CIDR=""
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WAN_GW_IPv4=""
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# First pass: match each interface with a private IP against the expected
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# private target CIDRs (each router interface lives in its own unique
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# micro-subnet, so matching by CIDR membership is unambiguous).
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for iface in $(ls /sys/class/net/ | grep -v lo); do
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if has_private_ip "$iface"; then
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priv_ip_netmask_cidr=$(get_private_ip_netmask_cidr "$iface")
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[ -z "$priv_ip_netmask_cidr" ] && continue
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priv_ip=$(echo "$priv_ip_netmask_cidr" | cut -d',' -f1)
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for target in "$${PRIV_TARGETS[@]}"; do
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target_cidr="$${target%%|*}"
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target_name="$${target##*|}"
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if ip_in_cidr "$priv_ip" "$target_cidr"; then
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if [ -n "$${PRIV_IFACE[$target_name]:-}" ]; then
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log "Multiple interfaces matched target $target_name ($target_cidr): $${PRIV_IFACE[$target_name]} and $iface"
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continue
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fi
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PRIV_IFACE[$target_name]="$iface"
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PRIV_MAC[$target_name]=$(cat "/sys/class/net/$iface/address" 2>/dev/null)
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PRIV_IPv4[$target_name]=$priv_ip
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PRIV_NETMASK[$target_name]=$(echo "$priv_ip_netmask_cidr" | cut -d',' -f2)
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PRIV_CIDR[$target_name]=$(echo "$priv_ip_netmask_cidr" | cut -d',' -f3)
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MATCHED_PRIV_IFACES="$MATCHED_PRIV_IFACES $iface"
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log "Identified private interface $target_name: $iface (MAC: $${PRIV_MAC[$target_name]}) with IP: $priv_ip, CIDR: /$${PRIV_CIDR[$target_name]} (target $target_cidr)"
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fi
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done
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fi
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done
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# Second pass: Look for WAN interface
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for iface in $(ls /sys/class/net/ | grep -v lo); do
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# Skip interfaces already matched to a private target
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case " $MATCHED_PRIV_IFACES " in
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*" $iface "*) continue ;;
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esac
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ip_addrs=$(ip addr show "$iface" 2>/dev/null | grep 'inet ' | grep -v '127.0.0.1' | awk '{print $2}')
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if [ -n "$ip_addrs" ]; then
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# Check if interface has public IPs
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has_public="false"
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while IFS= read -r ip; do
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if [ -n "$ip" ] && ! is_private_ip "$ip"; then
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has_public="true"
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break
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fi
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done <<< "$ip_addrs"
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if [ "$has_public" = "true" ]; then
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WAN_IFACE="$iface"
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WAN_MAC=$(cat "/sys/class/net/$iface/address" 2>/dev/null)
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# Get both IP, netmask, and CIDR for WAN
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wan_ip_netmask_cidr=$(get_public_ip_netmask_cidr "$iface")
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if [ -n "$wan_ip_netmask_cidr" ]; then
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WAN_IFACE_IPv4=$(echo "$wan_ip_netmask_cidr" | cut -d',' -f1)
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WAN_NETMASK=$(echo "$wan_ip_netmask_cidr" | cut -d',' -f2)
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WAN_CIDR=$(echo "$wan_ip_netmask_cidr" | cut -d',' -f3)
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fi
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WAN_GW_IPv4=$(get_interface_gateway "$iface")
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log "Identified WAN interface: $iface (MAC: $WAN_MAC) with public IP: $WAN_IFACE_IPv4, Netmask: $WAN_NETMASK, CIDR: /$WAN_CIDR, Gateway: $WAN_GW_IPv4"
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break
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fi
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else
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# Interface with no IP - potential WAN candidate
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if [ -z "$WAN_IFACE" ]; then
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WAN_IFACE="$iface"
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WAN_MAC=$(cat "/sys/class/net/$iface/address" 2>/dev/null)
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WAN_GW_IPv4=$(get_interface_gateway "$iface")
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log "Identified WAN interface candidate: $iface (MAC: $WAN_MAC) - no IP assigned, Gateway: $WAN_GW_IPv4"
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fi
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fi
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done
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# If no WAN found but we matched at least one private interface, pick the
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# first still-unmatched interface as a fallback WAN candidate
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if [ -z "$WAN_IFACE" ] && [ -n "$MATCHED_PRIV_IFACES" ]; then
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for iface in $(ls /sys/class/net/ | grep -v lo); do
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case " $MATCHED_PRIV_IFACES " in
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*" $iface "*) continue ;;
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esac
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WAN_IFACE="$iface"
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WAN_MAC=$(cat "/sys/class/net/$iface/address" 2>/dev/null)
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WAN_GW_IPv4=$(get_interface_gateway "$iface")
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log "Assumed WAN interface: $iface (MAC: $WAN_MAC) - default selection, Gateway: $WAN_GW_IPv4"
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break
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done
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fi
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# Final assignment and logging
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log "Final interface assignment:"
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MISSING_PRIV_TARGETS=""
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for target in "$${PRIV_TARGETS[@]}"; do
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target_cidr="$${target%%|*}"
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target_name="$${target##*|}"
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if [ -n "$${PRIV_IFACE[$target_name]:-}" ]; then
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log " $target_name Interface: $${PRIV_IFACE[$target_name]} (MAC: $${PRIV_MAC[$target_name]})"
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log " $target_name IPv4: $${PRIV_IPv4[$target_name]}"
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log " $target_name CIDR: /$${PRIV_CIDR[$target_name]} (expected network: $target_cidr)"
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else
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log " $target_name Interface: Not detected (expected network: $target_cidr)"
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MISSING_PRIV_TARGETS="$MISSING_PRIV_TARGETS $target_name"
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fi
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||||
done
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|
||||
if [ -n "$WAN_IFACE" ]; then
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# Only set WAN IP, Netmask, CIDR and Gateway if WAN interface is detected
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log " WAN Interface: $WAN_IFACE (MAC: $WAN_MAC)"
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if [ -n "$WAN_IFACE_IPv4" ]; then
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log " WAN IPv4: $WAN_IFACE_IPv4"
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log " WAN Netmask: $WAN_NETMASK"
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log " WAN CIDR: /$WAN_CIDR"
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else
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log " WAN IPv4: Not assigned"
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log " WAN Netmask: Not available"
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log " WAN CIDR: Not available"
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WAN_IFACE_IPv4="" # Ensure it's empty if no IP found
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WAN_NETMASK="" # Ensure netmask is also empty
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WAN_CIDR="" # Ensure CIDR is also empty
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||||
fi
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||||
|
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if [ -n "$WAN_GW_IPv4" ]; then
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log " WAN Gateway: $WAN_GW_IPv4"
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else
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||||
log " WAN Gateway: Not detected"
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WAN_GW_IPv4="" # Ensure it's empty if no gateway found
|
||||
fi
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||||
else
|
||||
log " WAN Interface: Not detected"
|
||||
# Ensure WAN-related variables are empty
|
||||
WAN_IFACE_IPv4=""
|
||||
WAN_NETMASK=""
|
||||
WAN_CIDR=""
|
||||
WAN_GW_IPv4=""
|
||||
fi
|
||||
|
||||
# Validate that we have the required information before proceeding
|
||||
if [ -z "$WAN_MAC" ] || [ -z "$WAN_IFACE_IPv4" ] || [ -z "$WAN_CIDR" ] || [ -z "$WAN_GW_IPv4" ] || [ -n "$MISSING_PRIV_TARGETS" ]; then
|
||||
log "ERROR: Required network information is missing. Cannot proceed with network configuration."
|
||||
log "Missing information:"
|
||||
[ -z "$WAN_MAC" ] && log " - WAN MAC address"
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||||
[ -z "$WAN_IFACE_IPv4" ] && log " - WAN IP address"
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||||
[ -z "$WAN_CIDR" ] && log " - WAN CIDR"
|
||||
[ -z "$WAN_GW_IPv4" ] && log " - WAN Gateway"
|
||||
[ -n "$MISSING_PRIV_TARGETS" ] && log " - Unmatched private interfaces:$MISSING_PRIV_TARGETS"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Create backup of existing netplan config if it exists
|
||||
if [ -f "/etc/netplan/50-cloud-init.yaml" ]; then
|
||||
cp "/etc/netplan/50-cloud-init.yaml" "/etc/netplan/50-cloud-init.yaml.backup.$(date +%s)"
|
||||
log "Backed up existing netplan configuration"
|
||||
fi
|
||||
|
||||
# Disabling Cloud-Init
|
||||
log "Disabling Cloud-Init for Networking..."
|
||||
|
||||
cat > /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg <<'EOF'
|
||||
network: {config: disabled}
|
||||
EOF
|
||||
|
||||
log "Creating network config file"
|
||||
|
||||
# Creating netplan config with proper validation: WAN interface first, then
|
||||
# one ethernets entry per matched private interface (no default route on
|
||||
# private interfaces - each is an isolated point-to-point micro-subnet).
|
||||
cat > /etc/netplan/50-cloud-init.yaml << EOF
|
||||
network:
|
||||
version: 2
|
||||
ethernets:
|
||||
wan-iface:
|
||||
match:
|
||||
macaddress: "$WAN_MAC"
|
||||
set-name: eth0
|
||||
dhcp4: false
|
||||
addresses:
|
||||
- $WAN_IFACE_IPv4/$WAN_CIDR
|
||||
routes:
|
||||
- to: default
|
||||
via: $WAN_GW_IPv4
|
||||
nameservers:
|
||||
addresses: [8.8.8.8, 1.1.1.1]
|
||||
EOF
|
||||
|
||||
for target in "$${PRIV_TARGETS[@]}"; do
|
||||
target_name="$${target##*|}"
|
||||
priv_mac="$${PRIV_MAC[$target_name]}"
|
||||
priv_ip4="$${PRIV_IPv4[$target_name]}"
|
||||
priv_cidr="$${PRIV_CIDR[$target_name]}"
|
||||
|
||||
cat >> /etc/netplan/50-cloud-init.yaml << EOF
|
||||
$target_name-iface:
|
||||
match:
|
||||
macaddress: "$priv_mac"
|
||||
set-name: $target_name
|
||||
dhcp4: false
|
||||
addresses:
|
||||
- $priv_ip4/$priv_cidr
|
||||
EOF
|
||||
done
|
||||
|
||||
log "Network config file has been created"
|
||||
|
||||
# Test the netplan configuration before applying
|
||||
if netplan --debug generate; then
|
||||
log "Netplan configuration generated successfully"
|
||||
|
||||
# Apply the configuration
|
||||
netplan apply
|
||||
systemctl restart systemd-networkd
|
||||
|
||||
# Wait a moment for network to come up
|
||||
sleep 2
|
||||
|
||||
# Test connectivity to gateway
|
||||
if ping -c 1 -W 5 "$WAN_GW_IPv4" >/dev/null 2>&1; then
|
||||
log "Network configuration applied successfully! Gateway is reachable."
|
||||
|
||||
# Ask for confirmation before rebooting (optional safety measure)
|
||||
log "Network configuration applied. Rebooting in 10 seconds. Press Ctrl+C to cancel."
|
||||
sleep 10
|
||||
reboot
|
||||
else
|
||||
log "WARNING: Gateway is not reachable after configuration. Not rebooting to prevent lockout."
|
||||
log "Please check the network configuration manually."
|
||||
exit 1
|
||||
fi
|
||||
else
|
||||
log "ERROR: Netplan configuration failed to generate. Rolling back changes."
|
||||
# Note: In a real scenario, you'd want to restore the backup here
|
||||
exit 1
|
||||
fi
|
||||
Reference in new issue
Block a user