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governance/goals/pike/deploy-api-in-wsgi.rst

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Control Plane API endpoints deployment via WSGI

In some projects, API services can be run:

  1. As a Python command that runs a web server (e.g. wsgiref or werkzeug).
  2. As a WSGI application hosted by performant web servers (e.g. Apache with mod_wsgi or Nginx with uWSGI).

When a project provides a WSGI application the API service gains flexibility in terms of deployment, performance, configuration and scaling.

Gerrit Topic

To facilitate tracking, commits related to this goal should use the gerrit topic:

goal-deploy-api-in-wsgi

Completion Criteria

For all projects:

  1. Provide WSGI application script file(s) (e.g. to be used by web server). There shouldn't be any web server restriction and the application could be deploying to any web server that support WSGI applications.
  2. Switch devstack jobs to deploy control-plane API services in WSGI with Apache. Usage of Apache is already the default in Devstack, let's keep using it for consistency unless there is some efforts to support another web server but this is not the case at this time.

References

Reference documentation for the existing WSGI deployments: * http://docs.openstack.org/developer/keystone/apache-httpd.html * http://docs.openstack.org/developer/ceilometer/install/mod_wsgi.html

Current State / Anticipated Impact

On 12 Jan 2017 a review of git repositories owned by big tent project showed the projects that don't support their control-plane API services deployed via WSGI:

  • cloudkitty
  • congress
  • designate
  • freezer
  • glance
  • kuryr
  • magnum
  • murano
  • neutron
  • octavia
  • searchlight
  • solum
  • tacker
  • trove
  • vitrage
  • watcher
  • zun

These projects already deploy devstack with API service via WSGI: * aodh * ceilometer * cinder * gnocchi * ironic * keystone * mistral * nova * panko * swift * zaqar * (...)

Project Teams

barbican

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Chef OpenStack

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cinder

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cloudkitty

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Community App Catalog

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congress

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designate

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Documentation

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dragonflow

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ec2-api

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freezer

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fuel

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glance

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heat

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horizon

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I18n

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Infrastructure

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ironic

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karbor

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keystone

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kolla

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kuryr

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magnum

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manila

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mistral

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monasca

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murano

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neutron

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nova

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octavia

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OpenStack Charms

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OpenStack UX

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OpenStackAnsible

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OpenStackClient

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oslo

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Packaging-deb

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Packaging-rpm

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Puppet OpenStack

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Quality Assurance

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rally

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RefStack

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Release Management

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requirements

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sahara

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searchlight

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Security

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senlin

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solum

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Stable branch maintenance

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swift

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tacker

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Telemetry

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tricircle

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tripleo

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trove

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vitrage

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watcher

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winstackers

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zaqar

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zun

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