ironic-api is single threaded

[aeva black]

The API service is single threaded. It's not even using greenthreads, so it blocks on any rpcapi.call().

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/72851

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/72069
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=1da73ef2ba4e5bafaee95016b63c7fda5f788227
Submitter: Jenkins
Branch: master

commit 1da73ef2ba4e5bafaee95016b63c7fda5f788227
Author: Devananda van der Veen <email address hidden>
Date: Sat Feb 8 00:20:45 2014 -0800

    Add samples to serve API through Apache mod_wsgi

    The default API service (ironic.cmd.api) uses the wsgiref library.

    Some deployers may want to serve the API through apache/httpd instead.

    This patch adds application hooks to use with mod_wsgi, and a sample
    apache2 config file to demonstrate its use with debian-based distros.

    Change-Id: I44cd8e0941c350a6e5c16cf2d068c3e8d684ab47
    Related-bug: #1279206

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/72851
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=10e4b1458350422f487a77918d99e824afbe4141
Submitter: Jenkins
Branch: master

commit 10e4b1458350422f487a77918d99e824afbe4141
Author: Devananda van der Veen <email address hidden>
Date: Tue Feb 11 22:12:03 2014 -0800

    Make ironic-api not single threaded

    The ironic-api service is an instance of wsgiref
    simple_server.WSGIServer. This derives from SocketServer.TCPServer,
    which requires that SocketServer.ThreadingMixIn be mixed in for it to
    become thread'able, however this was not being done when starting the
    WSGIServer.

    This patch creates a ThreadedSimpleServer class, which is just a mix
    of ThreadingMixIn and WSGIServer, so that the ironic-api process
    does not block on network IO.

    Change-Id: I9d686765edb4975519840a51d3beeb2be797a4fa
    Related-bug: #1279206