The uWSGI project

The uWSGI project aims at developing a full stack for building hosting services.

Application servers (for various programming languages and protocols), proxies, process managers and monitors are all implementedusing a common api and a common configuration style.

Thanks to its pluggable architecture it can be extended to support more platforms and languages.

Currently, you can write plugins in C, C++ and Objective-C.

The “WSGI” part in the name is a tribute to the namesake Python standard, as it has been the first developed plugin for the project.

Versatility, performance, low-resource usage and reliability are the strengths of the project (and the only rules followed).

Included components (updated to latest stable release)

The Core (implements configuration, processes management, sockets creation, monitoring, logging, shared memory areas, ipc, cluster membership and the uWSGI Subscription Server)

Request plugins (implement application server interfaces for various languages and platforms: WSGI, PSGI, Rack, Lua WSAPI, CGI, PHP, Go …)

Gateways (implement load balancers, proxies and routers)

The Emperor (implements massive instances management and monitoring)

Loop engines (implement events and concurrency, components can be run in preforking, threaded, asynchronous/evented and green thread/coroutine modes. Various technologies are supported, including uGreen, Greenlet, Stackless, Gevent, Coro::AnyEvent, Tornado, Goroutines and Fibers)

Note

uWSGI is a very active project with a fast release cycle. For this reason the code and the documentation may not always be in sync.We try our best to have good documentation, but it is a hard work. Sorry for that.If you are in trouble, the mailing list is the best source for help regarding uWSGI.Contributors for documentation (in addition to code) are always welcome.

Quickstarts

• Quickstart for Python/WSGI applications
• Quickstart for perl/PSGI applications
• Quickstart for ruby/Rack applications
• Snippets

Table of Contents

• Getting uWSGI
• Installing uWSGI
• The uWSGI build system
• Managing the uWSGI server
• Supported languages and platforms
• Supported Platforms/Systems
• Web server integration
• Frequently Asked Questions (FAQ)
• Things to know (best practices and “issues”) READ IT !!!
• Configuring uWSGI
• Fallback configuration
• Configuration logic
• uWSGI Options
• Defining new options for your instances
• How uWSGI parses config files
• uwsgi protocol magic variables
• The uwsgi Protocol
• Managing external daemons/services
• The Master FIFO
• Socket activation with inetd/xinetd
• Running uWSGI via Upstart
• Systemd
• Running uWSGI instances with Circus
• Embedding an application in uWSGI
• Logging
• Formatting uWSGI requests logs
• Log encoders
• Hooks
• Overriding Workers
• Glossary
• uWSGI third party plugins

Tutorials

• The uWSGI Caching Cookbook
• Setting up Django and your web server with uWSGI and nginx
• Running uWSGI on Dreamhost shared hosting
• Running python webapps on Heroku with uWSGI
• Running Ruby/Rack webapps on Heroku with uWSGI
• Reliably use FUSE filesystems for uWSGI vassals (with Linux)
• Build a dynamic proxy using RPC and internal routing
• Setting up Graphite on Ubuntu using the Metrics subsystem

Articles

• Serializing accept(), AKA Thundering Herd, AKA the Zeeg Problem
• The Art of Graceful Reloading
• Fun with Perl, Eyetoy and RaspberryPi
• Offloading Websockets and Server-Sent Events AKA “Combine them with Django safely”
• WSGI env behaviour policies

uWSGI Subsystems

• The uWSGI alarm subsystem (from 1.3)
• The uWSGI caching framework
• WebCaching framework
• The uWSGI cron-like interface
• The uWSGI FastRouter
• uWSGI internal routing
• The uWSGI Legion subsystem
• Locks
• uWSGI Mules
• The uWSGI offloading subsystem
• The uWSGI queue framework
• uWSGI RPC Stack
• SharedArea – share memory pages between uWSGI components
• The uWSGI Signal Framework
• The uWSGI Spooler
• uWSGI Subscription Server
• Serving static files with uWSGI (updated to 1.9)
• SNI - Server Name Identification (virtual hosting for SSL nodes)
• The GeoIP plugin
• uWSGI Transformations
• WebSocket support
• The Metrics subsystem
• The Chunked input API

Scaling with uWSGI

• The uWSGI cheaper subsystem – adaptive process spawning
• The uWSGI Emperor – multi-app deployment
• Auto-scaling with Broodlord mode
• Zerg mode
• Adding applications dynamically
• Scaling SSL connections (uWSGI 1.9)

Securing uWSGI

• Setting POSIX Capabilities
• Running uWSGI in a Linux CGroup
• Using Linux KSM in uWSGI
• Jailing your apps using Linux Namespaces
• The old way: the –namespace option
• FreeBSD Jails
• The Forkpty Router
• The TunTap Router

Keeping an eye on your apps

• Monitoring uWSGI with Nagios
• The embedded SNMP server
• Pushing statistics (from 1.4)
• Integration with Graphite/Carbon
• The uWSGI Stats Server
• The Metrics subsystem

Async and loop engines

• uWSGI asynchronous/non-blocking modes (updated to uWSGI 1.9)
• The Gevent loop engine
• The Tornado loop engine
• uGreen – uWSGI Green Threads
• The asyncio loop engine (CPython >= 3.4, uWSGI >= 2.0.4)

Web Server support

• Apache support
• Cherokee support
• Native HTTP support
• HTTPS support (from 1.3)
• The SPDY router (uWSGI 1.9)
• Lighttpd support
• Attaching uWSGI to Mongrel2
• Nginx support
• Using OpenBSD httpd as proxy
• Notes

Language support

• Python support
  • The uwsgi Python module
  • uWSGI API - Python decorators
  • Pump support
  • Python Tracebacker
  • Aliasing Python modules
  • Application dictionary
  • Virtualenv support
  • Python 3
  • Paste support
  • Pecan support
  • Using the django-uwsgi Django app
• The PyPy plugin
  • Introduction
  • Install uWSGI with PyPy support
  • The PyPy home
  • The PyPy setup file
  • WSGI support
  • RPC support
  • IPython trick
  • uWSGI API status
  • Options
  • Notes
• Running PHP scripts in uWSGI
  • Building
  • Running PHP apps with nginx
  • Advanced configuration
  • Run PHP apps without a frontend server
  • uWSGI API support
  • Sessions over uWSGI caches (uWSGI >=2.0.4)
  • Zend Opcode Cache (uWSGI >= 2.0.6)
  • ForkServer (uWSGI >= 2.1)
• uWSGI Perl support (PSGI)
  • Compiling the PSGI plugin
  • Usage
  • Tested PSGI frameworks/applications
  • Multi-app support
  • The auto reloader (from uWSGI 1.9.18)
  • Notes
  • Real world example, HTML::Mason
• Ruby support
  • Ruby API support
  • Building uWSGI for Ruby support
  • A note regarding memory consumption
  • A note regarding threads and fibers
  • Running Rack applications on uWSGI
  • Running Ruby on Rails applications on uWSGI
• Using Lua/WSAPI with uWSGI
  • Building the plugin
  • Why Lua ?
  • Your first WSAPI application
  • Concurrency
  • Abusing coroutines
  • Threading example
  • A note on memory
  • RPC and signals
  • The Lua shell
  • Using Lua as ‘configurator’
  • uWSGI api status
• JVM in the uWSGI server (updated to 1.9)
  • The JWSGI interface
  • The Clojure/Ring JVM request handler
  • Introduction
  • Building the JVM support
  • Exposing functions via the RPC subsystem
  • Registering signal handlers
  • The fork() problem and multithreading
  • How does it work?
  • Passing options to the JVM
  • Loading classes (without main method)
  • Request handlers
  • Notes
• The Mono ASP.NET plugin
  • Building uWSGI + Mono
  • Starting the server
  • Under the hood: the mono key
  • Concurrency and fork() unfriendliness
  • API access
  • Tricks
• Running CGI scripts on uWSGI
  • Enabling the plugin
  • Configuring CGI mode
  • Notes
  • Examples
• The GCCGO plugin
  • How it works
  • Why not use plain Go?
  • Building the plugin
  • The first app
  • uwsgi.gox
  • Shared libraries VS monolithic binaries
  • Goroutines
  • Options
  • uWSGI API
  • Notes
• The Symcall plugin
  • Step 1: preparing the environment
  • Step 2: our first request handler:
  • Step 3: building our code as a shared library
  • Final step: map the symcall plugin to the mysym_function symbol
  • Hooks and symcall unleashed: a TCL handler
  • Considerations
• The XSLT plugin
  • The request handler
  • The routing instruction
• SSI (Server Side Includes) plugin
  • Using it as a request handler
  • Using SSI as a routing action
  • Supported SSI commands
  • Status
• uWSGI V8 support
  • Building
  • RPC
  • Signal handlers
  • Multitheading and multiprocess
  • Mules
  • The uWSGI API
  • JSGI 3.0
  • CommonJS
• The GridFS plugin
  • Requirements and install
  • Standalone quickstart
  • The initial slash problem
  • Multiple mountpoints (and servers)
  • Replica sets
  • Prefixes
  • MIME types and filenames
  • Timeouts
  • MD5 and ETag headers
  • Multithreading
  • Combining with Nginx
  • The ‘gridfs’ internal routing action
  • Notes
• The GlusterFS plugin
  • Step1: glusterfs installation
  • Step2: the first cluster
  • Step3: uWSGI
  • High availability
  • Multiple mountpoints
  • Multiprocess VS multithread
  • Internal routing
  • Using capabilities (on Linux)
  • Notes:
• The RADOS plugin
  • Step1: Ceph cluster and content
  • Step2: uWSGI
  • High availability
  • Multiple mountpoints
  • HTTP methods
  • Features
  • Caching example
  • Security note
  • Notes

Other plugins

• The Pty plugin
• SPNEGO authentication
• Configuring uWSGI with LDAP

Broken/deprecated features

• Integrating uWSGI with Erlang
• Management Flags
• uWSGI Go support (1.4 only)

Release Notes

Stable releases

• uWSGI 2.0.18
• uWSGI 2.0.17.1
• uWSGI 2.0.17
• uWSGI 2.0.16
• uWSGI 2.0.15
• uWSGI 2.0.14
• uWSGI 2.0.13.1
• uWSGI 2.0.13
• uWSGI 2.0.12
• uWSGI 2.0.11.2
• uWSGI 2.0.11.1
• uWSGI 2.0.11
• uWSGI 2.0.10
• uWSGI 2.0.9
• uWSGI 2.0.8
• uWSGI 2.0.7
• uWSGI 2.0.6
• uWSGI 2.0.5
• uWSGI 2.0.4
• uWSGI 2.0.3
• uWSGI 2.0.2
• uWSGI 2.0.1
• uWSGI 2.0
• uWSGI 1.9.21
• uWSGI 1.9.20
• uWSGI 1.9.19
• uWSGI 1.9.18
• uWSGI 1.9.17
• uWSGI 1.9.16
• uWSGI 1.9.15
• uWSGI 1.9.14
• uWSGI 1.9.13
• uWSGI 1.9.12
• uWSGI 1.9.11
• uWSGI 1.9.10
• uWSGI 1.9.9
• uWSGI 1.9.8
• uWSGI 1.9.7
• uWSGI 1.9.6
• uWSGI 1.9.5
• uWSGI 1.9.4
• uWSGI 1.9.3
• uWSGI 1.9.2
• uWSGI 1.9.1
• uWSGI 1.9

Contact

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Commercial support

You can buy commercial support from http://unbit.com

Donate

uWSGI development is maintained by Unbit . You can buy commercial support and licensing. If you are not an Unbit customer, or you cannot/do not want to buy a commercial uWSGI license, consider making a donation. Obviously please feel free to ask for new features in your donation.

We will give credit to everyone who wants to sponsor new features.

Check http://unbit.it/uwsgi_donate for the donation link.

Sponsors

https://www.pythonanywhere.com/

https://lincolnloop.com/

https://yourlabs.io/oss

https://fili.com

Indices and tables

• Index
• Module Index
• Search Page