Comment 90 for bug 1361360

Reviewed: https://review.openstack.org/177686
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=d2d6aba069ea3101dfbc3363689eb6142ffb6d1f
Submitter: Jenkins
Branch: stable/juno

commit d2d6aba069ea3101dfbc3363689eb6142ffb6d1f
Author: abhishekkekane <email address hidden>
Date: Tue Oct 21 04:10:57 2014 -0700

    Eventlet green threads not released back to pool

    Presently, the wsgi server allows persist connections hence even after
    the response is sent to the client, it doesn't close the client socket
    connection.
    Because of this problem, the green thread is not released back to the pool.

    In order to close the client socket connection explicitly after the
    response is sent and read successfully by the client, you simply have to
    set keepalive to False when you create a wsgi server.

    Add a parameter to take advantage of the new(ish) eventlet socket timeout
    behaviour. Allows closing idle client connections after a period of
    time, eg:

    $ time nc localhost 8776
    real 1m0.063s

    Setting 'client_socket_timeout = 0' means do not timeout.

    DocImpact:
    Added wsgi_keep_alive option (default=True).
    Added client_socket_timeout option (default=900).

    SecurityImpact

    Conflicts:
            keystone/common/config.py
            keystone/common/environment/eventlet_server.py

    NOTE: This is not 1:1 cherry-pick because 'eventlet_server' config
    group is not present in juno.

    Closes-Bug: #1361360
    Change-Id: I03b9c5c64f4bd8bca78dfc83199ef17d9a7ea5b7
    (cherry picked from commit 3b08644eb9cf4c5aca51a36250ae93105c17f6c4)
    (cherry picked from commit 67cda0ccae04471340bcada099d945d90979e64d)