pyruvate 0.9.0

From Python

A hello world WSGI application using pyruvate listening on 127.0.0.1:7878 and using 2 worker threads looks like this:

import pyruvate

def application(environ, start_response):
    """Simplest possible application object"""
    status = '200 OK'
    response_headers = [('Content-type', 'text/plain')]
    start_response(status, response_headers, None)
    return [b"Hello world!\n"]

pyruvate.serve(application, "127.0.0.1:7878", 2)

Using PasteDeploy

Again listening on 127.0.0.1:7878 and using 2 worker threads:

[server:main]
use = egg:pyruvate#main
socket = 127.0.0.1:7878
workers = 2

Configuration Options

socket

Required: The TCP socket Pyruvate should bind to. pyruvate also supports systemd socket activation If you specify None as the socket value, pyruvate will try to acquire a socket bound by systemd.

workers

Required: Number of worker threads to use.

write_blocking

Optional: Use a blocking connection for writing. Pyruvate currently supports two types of workers: The default worker will write in a non-blocking manner, registering WSGI responses for later processing if the socket isn’t available for writing immediately. By setting this option to True you can enable a worker that will instead set the connection into blocking mode for writing. Defaults to False.

max_number_headers

Optional: Maximum number of request headers that will be parsed. If a request contains more headers than configured, request processing will stop with an error indicating an incomplete request. The default is 24 headers

async_logging

Optional: Log asynchronously using a dedicated thread. Defaults to True.

max_reuse_count

Optional: Specify how often to reuse an existing connection. Setting this parameter to 0 will effectively disable keep-alive connections. This is the default.

keepalive_timeout

Optional: Specify a timeout in integer seconds for keepalive connection. The persistent connection will be closed after the timeout expires. Defaults to 60 seconds.

chunked_transfer

Optional: Whether to use chunked transfer encoding if no Content-Length header is present. Defaults to False.

Logging

Pyruvate uses the standard Python logging facility. The logger name is pyruvate. See the Python documentation (logging, logging.config) for configuration options.

Django 2

After installing Pyruvate in your Django virtualenv, create or modify your wsgi.py file (one worker listening on 127.0.0.1:8000):

import os
import pyruvate

from django.core.wsgi import get_wsgi_application

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "your_django_application.settings")

application = get_wsgi_application()

pyruvate.serve(application, "127.0.0.1:8000", 1)

You can now start Django + Pyruvate with:

$ python wsgi.py

Override settings by using the DJANGO_SETTINGS_MODULE environment variable when appropriate. Tested with Django 2.2.x.

MapProxy

First create a basic WSGI configuration following the MapProxy deployment documentation. Then modify config.py so it is using Pyruvate (2 workers listening on 127.0.0.1:8005):

from logging.config import fileConfig
import os.path
import pyruvate
fileConfig(r'/path/to/mapproxy/log.ini', {'here': os.path.dirname(__file__)})

from mapproxy.wsgiapp import make_wsgi_app
application = make_wsgi_app(r'/path/to/mapproxy/mapproxy.yml')

pyruvate.serve(application, "127.0.0.1:8005", 2)

Start from your virtualenv:

$ python config.py

Tested with Mapproxy 1.12.x.

Plone 5.2

Using zc.buildout and plone.recipe.zope2instance you can define an instance part using Pyruvate’s PasteDeploy <https://pastedeploy.readthedocs.io/en/latest/> _entry point:

[instance]
recipe = plone.recipe.zope2instance
http-address = 127.0.0.1:8080
eggs =
    Plone
    pyruvate
wsgi-ini-template = ${buildout:directory}/templates/pyruvate.ini.in

The server section of the template provided with the wsgi-ini-template option should look like this (3 workers listening on http-address as specified in the buildout [instance] part):

[server:main]
use = egg:pyruvate#main
socket = %(http_address)s
workers = 3

Tested with Plone 5.2.x.

Pyramid

Install Pyruvate in your Pyramid virtualenv using pip:

$ pip install pyruvate

Modify the server section in your .ini file to use Pyruvate’s PasteDeploy <https://pastedeploy.readthedocs.io/en/latest/> _entry point (listening on 127.0.0.1:7878 and using 5 workers):

[server:main]
use = egg:pyruvate#main
socket = 127.0.0.1:7878
workers = 5

Start your application as usual using pserve:

$ pserve path/to/your/configfile.ini

Tested with Pyramid 1.10.x.

Nginx settings

Like other WSGI servers pyruvate should be used behind a reverse proxy, e.g. Nginx:

....
location / {
    proxy_pass http://localhost:7878;
    ...
}
...