301 lines
9.1 KiB
Bash
Executable File
301 lines
9.1 KiB
Bash
Executable File
#!/bin/sh
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# /docker-entrypoint.d/40-connect-proxies.sh
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# Generiert pro Zeile in /etc/nginx/forwarding.conf:
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# - HTTPS vHost (Proxy oder local static) NUR wenn Zertifikate existieren
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# - optional 80->443 Redirect-Server (mit ACME-Ausnahme) bei http_behavior=redirect
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# Läuft automatisch beim Containerstart (nginx:alpine EntryPoint).
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set -eu
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CONF_DIR="/etc/nginx/conf.d"
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LIVE_DIR="/etc/letsencrypt/live"
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FWD_FILE="/etc/nginx/forwarding.conf"
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HTTPS_SUFFIX="-https.generated.conf"
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HTTP_REDIRECT_SUFFIX="-http-redirect.generated.conf"
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GLOBALS_FILE="$CONF_DIR/_globals.generated.conf"
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echo "[connect-proxies] start …"
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# 0) Forwarding-Datei vorhanden?
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if [ ! -f "$FWD_FILE" ]; then
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echo "[connect-proxies] WARN: $FWD_FILE fehlt – keine Proxies zu generieren."
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exit 0
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fi
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# 1) Globale HTTP-Kontext-Map + Resolver (idempotent)
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RESOLVERS="$(awk '/^nameserver/{print $2}' /etc/resolv.conf | xargs || true)"
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if [ -n "${RESOLVERS:-}" ]; then
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RESOLVER_LINE="resolver $RESOLVERS ipv6=off valid=30s;"
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else
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RESOLVER_LINE="resolver 127.0.0.11 ipv6=off valid=30s;"
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fi
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cat > "$GLOBALS_FILE" <<NGINX
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# Automatisch generiert – nicht editieren
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map \$http_upgrade \$connection_upgrade {
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default upgrade;
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'' close;
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}
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$RESOLVER_LINE
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NGINX
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# 1b) Default-Server für 443: weist unbekanntes/leeres SNI sauber ab,
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# statt es an den alphabetisch ersten vHost zu "vererben" (Anti-Leak).
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# Greift auch dann, wenn einer Domain das Zertifikat fehlt.
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DEFAULT_443_FILE="$CONF_DIR/00-default-server.generated.conf"
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cat > "$DEFAULT_443_FILE" <<'NGINX'
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# Automatisch generiert – nicht editieren
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# Fängt alle HTTPS-Verbindungen ab, deren SNI auf keinen echten vHost passt,
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# und lehnt den TLS-Handshake ab. So landet eine unbekannte/zertifikatslose
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# Domain NIE still beim ersten vHost. Braucht per ssl_reject_handshake
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# bewusst KEIN eigenes Zertifikat.
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server {
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listen 443 ssl http2 default_server;
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listen [::]:443 ssl http2 default_server;
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ssl_reject_handshake on;
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}
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NGINX
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# 2) Alte generierte Confs entfernen
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rm -f "$CONF_DIR/"*"$HTTPS_SUFFIX" 2>/dev/null || true
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rm -f "$CONF_DIR/"*"$HTTP_REDIRECT_SUFFIX" 2>/dev/null || true
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# 3) Zeilen verarbeiten
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LINE_NO=0
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while IFS= read -r RAW || [ -n "$RAW" ]; do
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LINE_NO=$((LINE_NO+1))
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LINE="$(printf '%s' "$RAW" | tr -d '\r' | sed 's/^[[:space:]]*//; s/[[:space:]]*$//')"
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[ -z "$LINE" ] && continue
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case "$LINE" in \#*) continue;; esac
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set -- $LINE
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SERVER_NAME="${1:-}"
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UPSTREAM_URL="${2:-}"
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HTTP_BEHAVIOR="${3:-redirect}"
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WEBSOCKETS="${4:-false}"
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VERIFY_TLS="${5:-false}"
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CERT_DOMAIN="${6:-$SERVER_NAME}"
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LISTEN_PORT="${7:-443}"
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AUTH_REQUIRED="${8:-false}"
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if [ -z "$SERVER_NAME" ] || [ -z "$UPSTREAM_URL" ]; then
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echo "[connect-proxies] WARN(Line $LINE_NO): unvollständig -> $LINE"
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continue
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fi
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FULLCHAIN="$LIVE_DIR/$CERT_DOMAIN/fullchain.pem"
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PRIVKEY="$LIVE_DIR/$CERT_DOMAIN/privkey.pem"
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HTTPS_OUT="$CONF_DIR/${SERVER_NAME}-p${LISTEN_PORT}${HTTPS_SUFFIX}"
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HTTP_REDIRECT_OUT="$CONF_DIR/${SERVER_NAME}${HTTP_REDIRECT_SUFFIX}"
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SANITIZED_UPSTREAM="${UPSTREAM_URL%/}"
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DNS_OK="true"
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SCHEME=""; HOST=""; PORT=""
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if [ "$SANITIZED_UPSTREAM" != "local" ]; then
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case "$SANITIZED_UPSTREAM" in
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http://*) URI="${SANITIZED_UPSTREAM#http://}"; SCHEME="http"; DEFAULT_PORT="80";;
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https://*) URI="${SANITIZED_UPSTREAM#https://}"; SCHEME="https"; DEFAULT_PORT="443";;
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*)
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echo "[connect-proxies] WARN(Line $LINE_NO): $SERVER_NAME upstream_url ungültig: '$UPSTREAM_URL' – überspringe."
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continue;;
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esac
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HOSTPORT="${URI%%/*}"
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HOST="${HOSTPORT%%:*}"
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PORT="${HOSTPORT#*:}"; [ "$PORT" = "$HOSTPORT" ] && PORT="$DEFAULT_PORT"
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if command -v getent >/dev/null 2>&1; then
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if ! getent hosts "$HOST" >/dev/null 2>&1; then
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DNS_OK="false"
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echo "[connect-proxies] [-] $SERVER_NAME: DNS nicht auflösbar ($HOST) – erzeuge 503-Placeholder statt Proxy."
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fi
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else
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DNS_OK="unknown"
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fi
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fi
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if [ -f "$FULLCHAIN" ] && [ -f "$PRIVKEY" ]; then
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echo "[connect-proxies] [+] $SERVER_NAME: Zertifikat OK (cert_domain=$CERT_DOMAIN). Erzeuge 443 …"
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# Auth-Block vorbereiten
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AUTH_BLOCK=""
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if [ "$AUTH_REQUIRED" = "true" ]; then
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AUTH_BLOCK="
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auth_request /auth;
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location = /auth {
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proxy_pass http://appserverauth:3000/internal/auth;
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proxy_pass_request_body off;
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proxy_set_header Content-Length \"\";
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proxy_set_header X-Original-URI \$request_uri;
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proxy_set_header Host server.schooltech.ch;
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proxy_set_header Cookie \$http_cookie;
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}"
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fi
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# Fall A: local (statisch, kein Proxy)
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if [ "$SANITIZED_UPSTREAM" = "local" ]; then
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cat > "$HTTPS_OUT" <<NGINX
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# Auto-generated - 443 static site
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server {
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listen ${LISTEN_PORT} ssl http2;
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listen [::]:${LISTEN_PORT} ssl http2;
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server_name $SERVER_NAME;
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$AUTH_BLOCK
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ssl_certificate $FULLCHAIN;
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ssl_certificate_key $PRIVKEY;
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ssl_protocols TLSv1.2 TLSv1.3;
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ssl_ciphers HIGH:!aNULL:!MD5;
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root /usr/share/nginx/html;
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index index.html;
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location /api/ {
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proxy_pass http://appserverauth:3000/api/;
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proxy_set_header Host \$host;
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proxy_set_header X-Real-IP \$remote_addr;
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proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto \$scheme;
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}
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location / {
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try_files \$uri \$uri/ /index.html;
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}
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}
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NGINX
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else
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# Proxy-Fall: DNS OK?
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if [ "$DNS_OK" = "false" ]; then
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cat > "$HTTPS_OUT" <<NGINX
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# Auto-generated - 443 placeholder (DNS failed)
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server {
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listen ${LISTEN_PORT} ssl http2;
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listen [::]:${LISTEN_PORT} ssl http2;
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server_name $SERVER_NAME;
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ssl_certificate $FULLCHAIN;
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ssl_certificate_key $PRIVKEY;
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ssl_protocols TLSv1.2 TLSv1.3;
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ssl_ciphers HIGH:!aNULL:!MD5;
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location / {
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default_type text/html;
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return 503 "<!doctype html><html><head><meta charset='utf-8'><title>Service temporarily unavailable</title></head><body style='font-family:sans-serif;margin:3rem'><h1>\$server_name nicht erreichbar</h1><p>DNS-Auflösung fehlgeschlagen. Bitte später erneut versuchen.</p></body></html>";
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}
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}
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NGINX
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else
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# Proxy mit Laufzeit-Auflösung
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cat > "$HTTPS_OUT" <<NGINX
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# Auto-generated - 443 reverse proxy
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server {
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listen ${LISTEN_PORT} ssl http2;
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listen [::]:${LISTEN_PORT} ssl http2;
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server_name $SERVER_NAME;
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$AUTH_BLOCK
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ssl_certificate $FULLCHAIN;
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ssl_certificate_key $PRIVKEY;
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ssl_protocols TLSv1.2 TLSv1.3;
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ssl_ciphers HIGH:!aNULL:!MD5;
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proxy_intercept_errors on;
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error_page 502 503 504 = @service_down;
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location / {
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set \$target $SANITIZED_UPSTREAM;
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proxy_pass \$target;
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proxy_set_header Host \$host;
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proxy_set_header X-Real-IP \$remote_addr;
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proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto \$scheme;
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proxy_http_version 1.1;
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NGINX
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if [ "$WEBSOCKETS" = "true" ]; then
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cat >> "$HTTPS_OUT" <<'NGINX'
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proxy_set_header Upgrade $http_upgrade;
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proxy_set_header Connection $connection_upgrade;
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NGINX
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else
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cat >> "$HTTPS_OUT" <<'NGINX'
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proxy_set_header Upgrade "";
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proxy_set_header Connection close;
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NGINX
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fi
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case "$SANITIZED_UPSTREAM" in
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https://*)
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if [ "$VERIFY_TLS" = "true" ]; then
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cat >> "$HTTPS_OUT" <<'NGINX'
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proxy_ssl_verify on;
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proxy_ssl_server_name on;
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NGINX
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else
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cat >> "$HTTPS_OUT" <<'NGINX'
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proxy_ssl_verify off;
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proxy_ssl_server_name on;
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NGINX
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fi
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;;
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esac
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cat >> "$HTTPS_OUT" <<'NGINX'
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proxy_buffering off;
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proxy_request_buffering off;
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client_max_body_size 50m;
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proxy_connect_timeout 60s;
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proxy_send_timeout 60s;
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proxy_read_timeout 60s;
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}
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location @service_down {
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default_type text/html;
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return 503 "<!doctype html><html><head><meta charset='utf-8'><title>Service temporarily unavailable</title></head><body style='font-family:sans-serif;margin:3rem'><h1>$server_name nicht erreichbar</h1><p>Der Dienst ist momentan nicht verfügbar. Bitte später erneut versuchen.</p></body></html>";
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}
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}
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NGINX
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fi
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fi
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# 80->443 Redirect-Server
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if [ "$HTTP_BEHAVIOR" = "redirect" ]; then
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cat > "$HTTP_REDIRECT_OUT" <<NGINX
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# Auto-generated – 80->443 redirect for $SERVER_NAME
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server {
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listen 80;
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listen [::]:80;
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server_name $SERVER_NAME;
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location ^~ /.well-known/acme-challenge/ {
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root /var/www/certbot;
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default_type "text/plain; charset=utf-8";
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}
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location / {
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return 301 https://\$host\$request_uri;
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}
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}
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NGINX
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else
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rm -f "$HTTP_REDIRECT_OUT" 2>/dev/null || true
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fi
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else
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echo "[connect-proxies] [-] $SERVER_NAME: keine Zertifikate (cert_domain=$CERT_DOMAIN). Entferne evtl. alte Confs."
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rm -f "$HTTPS_OUT" "$HTTP_REDIRECT_OUT" 2>/dev/null || true
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fi
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done < "$FWD_FILE"
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echo "[connect-proxies] nginx -t …"
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nginx -t
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echo "[connect-proxies] done." |