Fix postgres DNS: put both services on dokploy-network

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

README.md

@@ -44,13 +44,10 @@ POSTGRES_PASSWORD=надежный-пароль-бд
 
 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
-```
-
+3. Ошибка `Name or service not known` значит `panel` не видит хост БД:
+   - оба сервиса должны быть в сети `dokploy-network` (уже в compose);
+   - на сервере один раз: `docker network create dokploy-network` (Dokploy обычно создаёт сам);
+   - если сервис БД называется иначе — задайте `POSTGRES_HOST=<имя сервиса>`.
 4. Redeploy после правок.
 
 Админ при каждом старте **синхронизируется из ENV**.

docker-compose.yml

@@ -1,5 +1,5 @@
 services:
-  # IMPORTANT for Dokploy: attach domain to this service, port 8000
+  # Domain in Dokploy → service `panel`, port `8000`
   panel:
     build:
       context: .
@@ -22,10 +22,11 @@ services:
       ADMIN_PASSWORD: ${ADMIN_PASSWORD:-change-me-strong-password}
       ADMIN_EMAIL: ${ADMIN_EMAIL:-admin@example.com}
 
+      POSTGRES_HOST: ${POSTGRES_HOST:-postgres}
       POSTGRES_USER: ${POSTGRES_USER:-vpn}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-vpn}
       POSTGRES_DB: ${POSTGRES_DB:-vpn_panel}
-      DATABASE_URL: ${DATABASE_URL:-postgresql+asyncpg://vpn:vpn@postgres:5432/vpn_panel}
+      POSTGRES_PORT: ${POSTGRES_PORT:-5432}
 
       PUBLIC_HOST: ${PUBLIC_HOST:-127.0.0.1}
       PUBLIC_PORT: ${PUBLIC_PORT:-51820}
@@ -43,13 +44,13 @@ services:
       - wg_data:/data/wireguard
       - awg_data:/data/amneziawg
     networks:
-      - vpn_net
+      - dokploy-network
     healthcheck:
       test: ["CMD", "curl", "-f", "http://127.0.0.1:8000/health"]
       interval: 15s
       timeout: 5s
       retries: 10
-      start_period: 90s
+      start_period: 120s
 
   postgres:
     image: postgres:16-alpine
@@ -61,16 +62,17 @@ services:
     volumes:
       - postgres_data:/var/lib/postgresql/data
     networks:
-      - vpn_net
+      - dokploy-network
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"]
       interval: 5s
       timeout: 5s
-      retries: 10
+      retries: 20
+      start_period: 10s
 
 networks:
-  vpn_net:
-    driver: bridge
+  dokploy-network:
+    external: true
 
 volumes:
   postgres_data:

scripts/entrypoint.sh

@@ -3,19 +3,50 @@ set -e
 
 echo "==> VpnPanel starting"
 
-# Always build DATABASE_URL from POSTGRES_* (Dokploy-friendly)
+DB_HOST="${POSTGRES_HOST:-postgres}"
+DB_PORT="${POSTGRES_PORT:-5432}"
+DB_USER="${POSTGRES_USER:-vpn}"
+DB_PASS="${POSTGRES_PASSWORD:-vpn}"
+DB_NAME="${POSTGRES_DB:-vpn_panel}"
+
 export DATABASE_URL="$(
+  POSTGRES_HOST="$DB_HOST" \
+  POSTGRES_PORT="$DB_PORT" \
+  POSTGRES_USER="$DB_USER" \
+  POSTGRES_PASSWORD="$DB_PASS" \
+  POSTGRES_DB="$DB_NAME" \
   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}")
+host = os.environ["POSTGRES_HOST"]
+port = os.environ["POSTGRES_PORT"]
+user = os.environ["POSTGRES_USER"]
+password = os.environ["POSTGRES_PASSWORD"]
+db = os.environ["POSTGRES_DB"]
+print(
+    f"postgresql+asyncpg://{quote_plus(user)}:{quote_plus(password)}"
+    f"@{host}:{port}/{db}"
+)
 PY
 )"
 
+echo "DB target: ${DB_USER}@${DB_HOST}:${DB_PORT}/${DB_NAME}"
+
+echo "DNS check..."
+python - <<'PY'
+import os
+import socket
+
+host = os.environ.get("POSTGRES_HOST", "postgres")
+try:
+    infos = socket.getaddrinfo(host, None)
+    addrs = sorted({i[4][0] for i in infos})
+    print(f"Resolved {host} -> {', '.join(addrs)}")
+except Exception as exc:  # noqa: BLE001
+    print(f"WARNING: cannot resolve '{host}': {exc}")
+PY
+
 echo "Waiting for database..."
 python - <<'PY'
 import asyncio
@@ -38,9 +69,11 @@ async def wait_db(retries: int = 60) -> None:
             return
         except Exception as exc:  # noqa: BLE001
             print(f"DB not ready ({i + 1}/{retries}): {exc}")
-            await asyncio.sleep(1)
+            await asyncio.sleep(2)
     await engine.dispose()
     print("ERROR: database did not become ready", file=sys.stderr)
+    print("HINT: both panel and postgres must be on dokploy-network", file=sys.stderr)
+    print("HINT: in Dokploy set POSTGRES_HOST if DB service name differs", file=sys.stderr)
     sys.exit(1)