Fix Dokploy Bad Gateway: panel-first compose and stable boot

Co-authored-by: Cursor <cursoragent@cursor.com>

README.md

@@ -40,6 +40,19 @@ POSTGRES_PASSWORD=надежный-пароль-бд
 4. Deploy. Панель: порт `8000` (или домен через Traefik в Dokploy).
 5. Вход: `/admin/login`
 
+### Если Bad Gateway (502)
+
+1. В Dokploy Domain укажите сервис **`panel`**, порт **`8000`** (не `postgres`).
+2. Откройте логи сервиса `panel` — должны быть строки `Database is ready` и `Starting uvicorn`.
+3. Задайте `DATABASE_URL` явно, если пароль БД содержит спецсимволы:
+
+```env
+DATABASE_URL=postgresql+asyncpg://vpn:ПАРОЛЬ@postgres:5432/vpn_panel
+POSTGRES_PASSWORD=ПАРОЛЬ
+```
+
+4. Redeploy после правок.
+
 Админ при каждом старте **синхронизируется из ENV**.
 
 Файл `.env` на сервере **не обязателен** — все переменные читаются из Compose / Dokploy UI.

app/security.py

@@ -1,11 +1,15 @@
-from passlib.context import CryptContext
-
-pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+import bcrypt
 
 
 def hash_password(password: str) -> str:
-    return pwd_context.hash(password)
+    raw = password.encode("utf-8")
+    # bcrypt limit is 72 bytes
+    digest = bcrypt.hashpw(raw[:72], bcrypt.gensalt())
+    return digest.decode("utf-8")
 
 
 def verify_password(password: str, password_hash: str) -> bool:
-    return pwd_context.verify(password, password_hash)
+    try:
+        return bcrypt.checkpw(password.encode("utf-8")[:72], password_hash.encode("utf-8"))
+    except ValueError:
+        return False

docker-compose.yml

@@ -1,21 +1,5 @@
 services:
-  postgres:
-    image: postgres:16-alpine
-    restart: unless-stopped
-    environment:
-      POSTGRES_USER: ${POSTGRES_USER:-vpn}
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-vpn}
-      POSTGRES_DB: ${POSTGRES_DB:-vpn_panel}
-    volumes:
-      - postgres_data:/var/lib/postgresql/data
-    networks:
-      - vpn_net
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"]
-      interval: 5s
-      timeout: 5s
-      retries: 10
-
+  # IMPORTANT for Dokploy: attach domain to this service, port 8000
   panel:
     build:
       context: .
@@ -24,6 +8,8 @@ services:
     depends_on:
       postgres:
         condition: service_healthy
+    expose:
+      - "8000"
     ports:
       - "${PANEL_PORT:-8000}:8000"
     environment:
@@ -39,7 +25,7 @@ services:
       POSTGRES_USER: ${POSTGRES_USER:-vpn}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-vpn}
       POSTGRES_DB: ${POSTGRES_DB:-vpn_panel}
-      DATABASE_URL: postgresql+asyncpg://${POSTGRES_USER:-vpn}:${POSTGRES_PASSWORD:-vpn}@postgres:5432/${POSTGRES_DB:-vpn_panel}
+      DATABASE_URL: ${DATABASE_URL:-postgresql+asyncpg://vpn:vpn@postgres:5432/vpn_panel}
 
       PUBLIC_HOST: ${PUBLIC_HOST:-127.0.0.1}
       PUBLIC_PORT: ${PUBLIC_PORT:-51820}
@@ -62,8 +48,25 @@ services:
       test: ["CMD", "curl", "-f", "http://127.0.0.1:8000/health"]
       interval: 15s
       timeout: 5s
-      retries: 5
-      start_period: 20s
+      retries: 10
+      start_period: 90s
+
+  postgres:
+    image: postgres:16-alpine
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER:-vpn}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-vpn}
+      POSTGRES_DB: ${POSTGRES_DB:-vpn_panel}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    networks:
+      - vpn_net
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
 
 networks:
   vpn_net:

requirements.txt

@@ -5,7 +5,6 @@ asyncpg==0.30.0
 alembic==1.14.0
 pydantic==2.10.4
 pydantic-settings==2.7.0
-passlib[bcrypt]==1.7.4
 bcrypt==4.2.1
 python-multipart==0.0.20
 jinja2==3.1.5

scripts/entrypoint.sh

@@ -1,6 +1,21 @@
 #!/bin/sh
 set -e
 
+echo "==> VpnPanel starting"
+
+# Always build DATABASE_URL from POSTGRES_* (Dokploy-friendly)
+export DATABASE_URL="$(
+  python - <<'PY'
+import os
+from urllib.parse import quote_plus
+
+user = os.environ.get("POSTGRES_USER", "vpn")
+password = os.environ.get("POSTGRES_PASSWORD", "vpn")
+db = os.environ.get("POSTGRES_DB", "vpn_panel")
+print(f"postgresql+asyncpg://{quote_plus(user)}:{quote_plus(password)}@postgres:5432/{db}")
+PY
+)"
+
 echo "Waiting for database..."
 python - <<'PY'
 import asyncio
@@ -11,7 +26,7 @@ from sqlalchemy import text
 from sqlalchemy.ext.asyncio import create_async_engine
 
 
-async def wait_db(retries: int = 40) -> None:
+async def wait_db(retries: int = 60) -> None:
     url = os.environ["DATABASE_URL"]
     engine = create_async_engine(url)
     for i in range(retries):
@@ -25,6 +40,7 @@ async def wait_db(retries: int = 40) -> None:
             print(f"DB not ready ({i + 1}/{retries}): {exc}")
             await asyncio.sleep(1)
     await engine.dispose()
+    print("ERROR: database did not become ready", file=sys.stderr)
     sys.exit(1)
 
 
@@ -37,5 +53,5 @@ alembic upgrade head
 echo "Bootstrapping admin..."
 python -m app.bootstrap
 
-echo "Starting application..."
+echo "Starting uvicorn..."
 exec "$@"