Lukas
fc8cdc538d
- Add missing packages to requirements.txt: requests, beautifulsoup4, fake-useragent, yt-dlp, urllib3 - Fix entrypoint.sh: replace grep -oP (GNU) with awk (BusyBox compat) - Fix entrypoint.sh: add policy routing so LAN clients get responses via eth0 instead of through the WireGuard tunnel - Change healthcheck from ping to curl (VPN provider blocks ICMP) - Add start_period and increase retries for healthcheck - Change external port mapping to 2000:8000 - Add podman-compose.prod.yml and push.sh to version control
229 lines
9.5 KiB
Bash
229 lines
9.5 KiB
Bash
#!/bin/bash
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set -e
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INTERFACE="wg0"
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MOUNT_CONFIG="/etc/wireguard/${INTERFACE}.conf"
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CONFIG_DIR="/run/wireguard"
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CONFIG_FILE="${CONFIG_DIR}/${INTERFACE}.conf"
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CHECK_INTERVAL="${HEALTH_CHECK_INTERVAL:-10}"
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CHECK_HOST="${HEALTH_CHECK_HOST:-1.1.1.1}"
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# ──────────────────────────────────────────────
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# Validate config exists, copy to writable location
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# ──────────────────────────────────────────────
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if [ ! -f "$MOUNT_CONFIG" ]; then
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echo "[error] WireGuard config not found at ${MOUNT_CONFIG}"
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echo "[error] Mount your config file: -v /path/to/your.conf:/etc/wireguard/wg0.conf:ro"
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exit 1
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fi
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mkdir -p "$CONFIG_DIR"
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cp "$MOUNT_CONFIG" "$CONFIG_FILE"
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chmod 600 "$CONFIG_FILE"
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# Extract endpoint IP and port from the config
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VPN_ENDPOINT=$(grep -i '^Endpoint' "$CONFIG_FILE" | head -1 | sed 's/.*= *//;s/:.*//;s/ //g')
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VPN_PORT=$(grep -i '^Endpoint' "$CONFIG_FILE" | head -1 | sed 's/.*://;s/ //g')
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# Extract address
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VPN_ADDRESS=$(grep -i '^Address' "$CONFIG_FILE" | head -1 | sed 's/.*= *//;s/ //g')
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if [ -z "$VPN_ENDPOINT" ] || [ -z "$VPN_PORT" ]; then
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echo "[error] Could not parse Endpoint from ${CONFIG_FILE}"
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exit 1
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fi
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echo "[init] Config: ${CONFIG_FILE}"
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echo "[init] Endpoint: ${VPN_ENDPOINT}:${VPN_PORT}"
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echo "[init] Address: ${VPN_ADDRESS}"
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# ──────────────────────────────────────────────
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# Kill switch: only allow traffic through wg0
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# ──────────────────────────────────────────────
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setup_killswitch() {
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echo "[killswitch] Setting up iptables kill switch..."
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# Flush existing rules
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iptables -F
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iptables -X
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iptables -t nat -F
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# Default policy: DROP everything
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iptables -P INPUT DROP
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iptables -P FORWARD DROP
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iptables -P OUTPUT DROP
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# Allow loopback
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iptables -A INPUT -i lo -j ACCEPT
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iptables -A OUTPUT -o lo -j ACCEPT
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# Allow traffic to/from VPN endpoint (needed to establish tunnel)
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iptables -A OUTPUT -d "$VPN_ENDPOINT" -p udp --dport "$VPN_PORT" -j ACCEPT
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iptables -A INPUT -s "$VPN_ENDPOINT" -p udp --sport "$VPN_PORT" -j ACCEPT
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# Allow all traffic through the WireGuard interface
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iptables -A INPUT -i "$INTERFACE" -j ACCEPT
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iptables -A OUTPUT -o "$INTERFACE" -j ACCEPT
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# Allow DNS to the VPN DNS server (through wg0)
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iptables -A OUTPUT -o "$INTERFACE" -p udp --dport 53 -j ACCEPT
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iptables -A OUTPUT -o "$INTERFACE" -p tcp --dport 53 -j ACCEPT
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# Allow DHCP (for container networking)
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iptables -A OUTPUT -p udp --dport 67:68 -j ACCEPT
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iptables -A INPUT -p udp --sport 67:68 -j ACCEPT
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# Allow established/related connections
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iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
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iptables -A OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
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# ── Allow incoming connections to exposed service ports (e.g. app on 8000) ──
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# LOCAL_PORTS can be set as env var, e.g. "8000,8080,3000"
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if [ -n "${LOCAL_PORTS:-}" ]; then
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for port in $(echo "$LOCAL_PORTS" | tr ',' ' '); do
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echo "[killswitch] Allowing incoming traffic on port ${port}"
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iptables -A INPUT -p tcp --dport "$port" -j ACCEPT
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iptables -A OUTPUT -p tcp --sport "$port" -j ACCEPT
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done
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fi
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# ── FORWARDING (so other containers can use this VPN) ──
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iptables -A FORWARD -i eth0 -o "$INTERFACE" -j ACCEPT
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iptables -A FORWARD -i "$INTERFACE" -o eth0 -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
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# NAT: masquerade traffic from other containers going out through wg0
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iptables -t nat -A POSTROUTING -o "$INTERFACE" -j MASQUERADE
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echo "[killswitch] Kill switch active. Traffic blocked if VPN drops."
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}
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# ──────────────────────────────────────────────
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# Enable IP forwarding so other containers can route through us
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# ──────────────────────────────────────────────
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enable_forwarding() {
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echo "[init] Enabling IP forwarding..."
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if cat /proc/sys/net/ipv4/ip_forward 2>/dev/null | grep -q 1; then
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echo "[init] IP forwarding already enabled."
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elif echo 1 > /proc/sys/net/ipv4/ip_forward 2>/dev/null; then
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echo "[init] IP forwarding enabled via /proc."
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else
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echo "[init] /proc read-only — relying on --sysctl net.ipv4.ip_forward=1"
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fi
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}
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# ──────────────────────────────────────────────
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# Start WireGuard manually (no wg-quick, avoids sysctl issues)
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# ──────────────────────────────────────────────
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start_vpn() {
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echo "[vpn] Starting WireGuard interface ${INTERFACE}..."
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# Create the interface
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ip link add "$INTERFACE" type wireguard
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# Apply the WireGuard config (keys, peer, endpoint)
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wg setconf "$INTERFACE" <(grep -v -i '^\(Address\|DNS\|MTU\|Table\|PreUp\|PostUp\|PreDown\|PostDown\|SaveConfig\)' "$CONFIG_FILE")
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# Assign the address
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ip -4 address add "$VPN_ADDRESS" dev "$INTERFACE"
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# Set MTU
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ip link set mtu 1420 up dev "$INTERFACE"
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# Find default gateway/interface for the endpoint route
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DEFAULT_GW=$(ip route | grep '^default' | head -1 | awk '{print $3}')
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DEFAULT_IF=$(ip route | grep '^default' | head -1 | awk '{print $5}')
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# Route VPN endpoint through the container's default gateway
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if [ -n "$DEFAULT_GW" ] && [ -n "$DEFAULT_IF" ]; then
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ip route add "$VPN_ENDPOINT/32" via "$DEFAULT_GW" dev "$DEFAULT_IF" 2>/dev/null || true
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fi
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# Route all traffic through the WireGuard tunnel
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ip route add 0.0.0.0/1 dev "$INTERFACE"
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ip route add 128.0.0.0/1 dev "$INTERFACE"
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# ── Policy routing: ensure responses to incoming LAN traffic go back via eth0 ──
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if [ -n "$DEFAULT_GW" ] && [ -n "$DEFAULT_IF" ]; then
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# Get the container's eth0 IP address (BusyBox-compatible, no grep -P)
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ETH0_IP=$(ip -4 addr show "$DEFAULT_IF" | awk '/inet / {split($2, a, "/"); print a[1]}' | head -1)
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ETH0_SUBNET=$(ip -4 route show dev "$DEFAULT_IF" | grep -v default | head -1 | awk '{print $1}')
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if [ -n "$ETH0_IP" ] && [ -n "$ETH0_SUBNET" ]; then
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echo "[vpn] Setting up policy routing for incoming traffic (${ETH0_IP} on ${DEFAULT_IF})"
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ip route add default via "$DEFAULT_GW" dev "$DEFAULT_IF" table 100 2>/dev/null || true
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ip route add "$ETH0_SUBNET" dev "$DEFAULT_IF" table 100 2>/dev/null || true
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ip rule add from "$ETH0_IP" table 100 priority 100 2>/dev/null || true
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echo "[vpn] Policy routing active — incoming connections will be routed back via ${DEFAULT_IF}"
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fi
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fi
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# Set up DNS
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VPN_DNS=$(grep -i '^DNS' "$CONFIG_FILE" | head -1 | sed 's/.*= *//;s/ //g')
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if [ -n "$VPN_DNS" ]; then
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echo "nameserver $VPN_DNS" > /etc/resolv.conf
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echo "[vpn] DNS set to ${VPN_DNS}"
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fi
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echo "[vpn] WireGuard interface ${INTERFACE} is up."
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}
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# ──────────────────────────────────────────────
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# Stop WireGuard manually
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# ──────────────────────────────────────────────
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stop_vpn() {
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echo "[vpn] Stopping WireGuard interface ${INTERFACE}..."
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ip link del "$INTERFACE" 2>/dev/null || true
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}
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# ──────────────────────────────────────────────
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# Health check loop — restarts VPN if tunnel dies
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# ──────────────────────────────────────────────
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health_loop() {
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local failures=0
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local max_failures=3
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echo "[health] Starting health check (every ${CHECK_INTERVAL}s, target ${CHECK_HOST})..."
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while true; do
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sleep "$CHECK_INTERVAL"
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if curl -sf --max-time 5 "http://$CHECK_HOST" > /dev/null 2>&1; then
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if [ "$failures" -gt 0 ]; then
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echo "[health] VPN recovered."
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failures=0
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fi
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else
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failures=$((failures + 1))
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echo "[health] Ping failed ($failures/$max_failures)"
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if [ "$failures" -ge "$max_failures" ]; then
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echo "[health] VPN appears down. Restarting WireGuard..."
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stop_vpn
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sleep 2
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start_vpn
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failures=0
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echo "[health] WireGuard restarted."
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fi
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fi
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done
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}
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# ──────────────────────────────────────────────
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# Graceful shutdown
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# ──────────────────────────────────────────────
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cleanup() {
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echo "[shutdown] Stopping WireGuard..."
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stop_vpn
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echo "[shutdown] Flushing iptables..."
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iptables -F
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iptables -t nat -F
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echo "[shutdown] Done."
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exit 0
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}
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trap cleanup SIGTERM SIGINT
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# ── Main ──
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enable_forwarding
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setup_killswitch
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start_vpn
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health_loop
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