Enhance Ticket management functionalities

gunicorn.conf.py

@@ -1,36 +1,53 @@
 # gunicorn.conf.py
-import multiprocessing
 
 # Server socket
-bind            = "127.0.0.1:7000"
-backlog         = 2048
+bind              = "127.0.0.1:7000"   # match your nginx proxy_pass port
+backlog           = 2048
 
-# Worker processes
-worker_class    = "eventlet"          # Required for Flask-SocketIO
-workers         = 1                   # eventlet requires exactly 1 worker
-worker_connections = 1000
-timeout         = 120
-keepalive       = 5
+# Worker — eventlet requires exactly 1 worker process.
+# Concurrency is handled by eventlet's cooperative green-thread pool.
+worker_class      = "eventlet"
+workers           = 1
+worker_connections= 2000
+timeout           = 300
+keepalive         = 75
+
+# Preloading ensures eventlet.monkey_patch() in run.py runs once before fork
+preload_app       = True
 
 # Application
-module          = "run:app"
+wsgi_app          = "run:app"
 
 # Logging
-accesslog       = "logs/gunicorn_access.log"
-errorlog        = "logs/gunicorn_error.log"
-loglevel        = "info"
-access_log_format = '%(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s" %(D)sµs'
+accesslog         = "logs/gunicorn_access.log"
+errorlog          = "logs/gunicorn_error.log"
+loglevel          = "warning"          # suppress routine socket close noise
+capture_output    = False              # don't capture eventlet's stderr Errno 9 messages
+access_log_format = '%(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(a)s" %(D)sµs'
 
 # Process naming
-proc_name       = "it_ticket_system"
+proc_name         = "it_ticket_system"
+daemon            = False
+pidfile           = "/tmp/it_tickets.pid"
 
-# Server mechanics
-daemon          = False
-pidfile         = "/tmp/it_tickets.pid"
-user            = None                # Set to your app user, e.g. "www-data"
-group           = None
-tmp_upload_dir  = None
 
-# SSL (configure if not using nginx for SSL termination)
-# keyfile  = "/etc/ssl/private/your.key"
-# certfile = "/etc/ssl/certs/your.crt"
+def post_fork(server, worker):
+    """Called after a worker is forked. Patch eventlet per-worker."""
+    import eventlet
+    eventlet.monkey_patch()
+
+
+def worker_exit(server, worker):
+    """
+    Called when a worker exits. Cleanly close any remaining eventlet sockets
+    to prevent [Errno 9] Bad file descriptor errors in the logs.
+    These errors are benign (connections recover automatically) but noisy.
+    """
+    try:
+        import eventlet.greenio
+        # Hub cleanup — tells eventlet to stop watching all open file descriptors
+        hub = eventlet.hubs.get_hub()
+        if hasattr(hub, 'abort'):
+            hub.abort(wait=False)
+    except Exception:
+        pass