Open Stack

Hi, I'd like you to take a look at this patch for potential
DocImpact.
https://review.openstack.org/21139

Log:
commit 657a2d46314b379e9fb717533c45071c77468dc9
Author: Joe Cropper <jwcroppe at us.ibm.com>
Date:   Fri Feb 1 14:37:35 2013 -0600

    Optionally force instances to "stay put" on resize
    
    Previously there was a boolean "allow_resize_to_same_host" config option
    that would POTENTIALLY prevent an instance from moving on resize. While
    this suffices for certain cases, it doesn't quite provide the
    flexibility needed for some users. That is, an administrator may NEVER
    want to allow a migration to occur as a side effect of a resize
    operation.
    
    As such, a new config option, "resize_to_same_host", was introduced and
    can be any one of the following values: allow, require or forbid
    (default, consistent with the old option). When its value is set to
    "require", the "force_hosts" directive is passed along to the scheduler
    so that it can make the appropriate decision.
    
    Its predecessor, "allow_resize_to_same_host", has been deprecated; note
    that backwards compatibility will be preserved. Test cases also added.
    
    DocImpact
    Implements: blueprint configurable-resize-placement
    Change-Id: I09f50e3e5debe7c50d67e0f251323353625c83ec