Fix empty reply: remove gunicorn preload, isolate DB init from workers

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

Dockerfile

@@ -28,4 +28,4 @@ ENV GIT_CONFIG_VALUE_0=/repo
 EXPOSE 8000
 
 ENTRYPOINT ["/app/entrypoint.sh"]
-CMD ["gunicorn", "--bind", "0.0.0.0:8000", "--workers", "2", "--timeout", "120", "--preload", "wsgi:app"]
+CMD ["gunicorn", "-c", "gunicorn.conf.py", "wsgi:app"]

app/__init__.py

@@ -30,6 +30,7 @@ def create_app(setup_database=True):
         "postgresql://photohost:photohost_secret@localhost:5432/photohost",
     )
     app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
+    app.config["SQLALCHEMY_ENGINE_OPTIONS"] = {"pool_pre_ping": True}
     app.config["UPLOAD_FOLDER"] = os.getenv("UPLOAD_FOLDER", "uploads")
     app.config["MAX_CONTENT_LENGTH"] = int(os.getenv("MAX_UPLOAD_MB", "10")) * 1024 * 1024
     app.config["ALLOWED_EXTENSIONS"] = {"png", "jpg", "jpeg", "gif", "webp", "bmp"}
@@ -68,6 +69,7 @@ def create_app(setup_database=True):
         except Exception:
             return {"site_banners": {}}
 
+    if setup_database:
         with app.app_context():
             from app.models import (  # noqa: F401
                 AdBanner,
@@ -83,7 +85,7 @@ def create_app(setup_database=True):
 
             db.create_all()
 
-        if setup_database and os.getenv("SKIP_DB_INIT") != "1":
+            if os.getenv("SKIP_DB_INIT") != "1":
                 from app.bootstrap import run_database_setup
 
                 run_database_setup(app)

entrypoint.sh

@@ -12,7 +12,7 @@ if [ "$ALLOW_GIT_DEPLOY" = "true" ] || [ "$ALLOW_GIT_DEPLOY" = "1" ] || [ "$ALLO
 fi
 
 # Run DB migrations once before gunicorn workers start.
-gosu appuser python /app/init_db.py
+gosu appuser python /app/init_db.py || exit 1
 
 export SKIP_DB_INIT=1
 exec gosu appuser "$@"

gunicorn.conf.py

@@ -0,0 +1,12 @@
+bind = "0.0.0.0:8000"
+workers = 2
+timeout = 120
+accesslog = "-"
+errorlog = "-"
+capture_output = True
+
+
+def post_fork(server, worker):
+    from app import db
+
+    db.engine.dispose()