Comment 4 for bug 1717494

Reviewed: https://review.openstack.org/506315
Committed: https://git.openstack.org/cgit/openstack/ec2-api/commit/?id=1bf75237dda3d3fb5d49613c98fa5a8fbda5e098
Submitter: Jenkins
Branch: stable/pike

commit 1bf75237dda3d3fb5d49613c98fa5a8fbda5e098
Author: Stefan Nica <email address hidden>
Date: Fri Sep 15 13:39:37 2017 +0200

    fix ec2-api-metadata memcached overlap with nova-api

    When ec2-api-metadata and nova-api are using the same
    memcached server as a cache backend, the cached values
    get intermixed due to the fact that the cache keys are
    the same. The result is that either nova-api or
    ec2-api-metadata will report cache value errors.

    This commit fixes this potential problem by using
    a different cache key prefix for the ec2-api metadata
    entries.

    Change-Id: Ibd26b33b3370d5c9c6cca0bb6e0d9c9eb03c0d50
    Closes-Bug: #1717494
    (cherry picked from commit 1dad720ef588fcdcf7eec409dbc472ba52f085d0)