Comment 35 for bug 1590608

Reviewed: https://review.openstack.org/385767
Committed: https://git.openstack.org/cgit/openstack/aodh/commit/?id=3aeca07675a39ed12d0f224e71352faf03269bd8
Submitter: Jenkins
Branch: stable/newton

commit 3aeca07675a39ed12d0f224e71352faf03269bd8
Author: Juan Antonio Osorio Robles <email address hidden>
Date: Mon Oct 10 09:23:11 2016 +0300

    Add http_proxy_to_wsgi to api-paste

    This sets up the HTTPProxyToWSGI middleware in front of Aodh. The
    purpose of thise middleware is to set up the request URL correctly in
    case there is a proxy (For instance, a loadbalancer such as HAProxy)
    in front of Aodh.

    So, for instance, when TLS connections are being terminated in the
    proxy, and one tries to get the versions from the / resource of
    Aodh, one will notice that the protocol is incorrect; It will show
    'http' instead of 'https'. So this middleware handles such cases.
    Thus helping Keystone discovery work correctly.

    The HTTPProxyToWSGI is off by default and needs to be enabled via a
    configuration value.

    Change-Id: If2ada8a94c8e1ceacd4509605b4cd766a78f71d5
    Closes-Bug: #1590608
    (cherry picked from commit 0f2a80d8efb86faea7ee94d7eb744bb66ad79ba9)