What is Emperor uWSGI?
It is a special uWSGI instance that will monitor specific events and will spawn/stop/reload instances (known as vassals, when managed by an Emperor) on demand. By default the Emperor will scan specific directories for supported (. ini, . xml, .
How do I know if uWSGI is running?
If there are no socket files in /run/uwsgi , it generally means that the uwsgi process was unable to create it. Check the status of the uwsgi process to find out whether it was able to start: sudo systemctl status uwsgi.
How many processes does uWSGI have?
The threads option is used to tell uWSGI to start our application in prethreaded mode. That essentially means it is launching the application across multiple threads, making our four processes essentially eight processes.
How do I turn off uWSGI?
Stopping the server If you have the uWSGI process running in the foreground for some reason, you can just hit CTRL+C to kill it off.
How do I monitor uWSGI?
The official uWSGI distribution includes a plugin adding Nagios-friendly output. To monitor, and eventually get warning messages, via Nagios, launch the following command, where node is the socket (UNIX or TCP) to monitor.
What is uWSGI buffering?
Post-buffering mode (uWSGI >= 2.0. This means that as soon as the uwsgi packet (read: the request headers) is parsed, it is forwarded to the backend/backends. Now, if your web-proxy is a streaming-one too (like apache, or the uWSGI http router), your app could be blocked for ages in case of a request with a body.
What is harakiri in uWSGI?
harakiri. A feature of uWSGI that aborts workers that are serving requests for an excessively long time. Configured using the harakiri family of options. Every request that will take longer than the seconds specified in the harakiri timeout will be dropped and the corresponding worker recycled.
Why do I need uWSGI?
uwsgi (all lowercase) is the native binary protocol that uWSGI uses to communicate with other servers. uWSGI is often used for serving Python web applications in conjunction with web servers such as Cherokee and Nginx, which offer direct support for uWSGI’s native uwsgi protocol.
What is the use of uWSGI?
Can I use uWSGI without Nginx?
2 Answers. You don’t. That’s the simple answer, anyway — you don’t need it. uWSGI is itself a capable server.
What is socket in uWSGI?
HTTP sockets The http-socket option will make uWSGI natively speak HTTP. If your web server does not support the uwsgi protocol but is able to speak to upstream HTTP proxies, or if you are using a service like Webfaction or Heroku to host your application, you can use http-socket .
How to kill uWSGI process?
If you have the uWSGI process running in the foreground for some reason, you can just hit CTRL+C to kill it off. When dealing with background processes, you’ll need to use the master pidfile again. The SIGINT signal will kill uWSGI. kill -INT ` cat /tmp/project-master.pid ` # or for convenience… uwsgi –stop /tmp/project-master.pid
What is the master process mode in uWSGI?
When running with the master process mode, the uWSGI server can be gracefully restarted without closing the main sockets. This functionality allows you patch/upgrade the uWSGI server without closing the connection with the web server and losing a single request.
What is the uWSGI Emperor – multi-app deployment?
The uWSGI Emperor – multi-app deployment ¶ If you need to deploy a big number of apps on a single server, or a group of servers, the Emperor mode is just the ticket. It is a special uWSGI instance that will monitor specific events and will spawn/stop/reload instances (known as vassals, when managed by an Emperor) on demand.
How to force Emperor to pass options to uWSGI?
You can force the Emperor to pass options to uWSGI instances using environment variables too. Every environment variable of the form UWSGI_VASSAL_xxx will be rewritten in the new instance as UWSGI_xxx, with the usual configuration implications.