This adds a mention of the nova-scheduler service requiring
placement 1.17 and also links to the placement upgrade notes
from the more general upgrade notes, since we are now firmly
in a place where placement needs to be upgraded before nova.
Since we consider placement global, this removes the 1.14
note about nova-compute since we assume that if you're going
to upgrade placement to get 1.17 for the scheduler, and control
services should be upgraded before computes, then the computes
are going to get a new enough placement service automatically.
Change-Id: I06937c7642dca4a1932cbbf46569acc9c58e44a6
With change I2f367b06e683ed7c815dd9e0536a46e5f0a27e6c, nova-compute
now unconditionally requires Placement 1.14 to be available (the
client side code doesn't check to see if 1.14 is available before
trying to use it).
This change updates the nova-status check for the minimum required
version of Placement and also starts the "Queens" section of the
Placement upgrade notes docs.
Change-Id: I37415e384d375bc9b548a0223f787a9236286bb0
The web-server-deployment section of placement.rst has been updated
to provide additional links to information and reflect the fact that
placement is now using uwsgi and mod_proxy_uwsgi in devstack. This
does not provide a full set of installations instructions. This is
somewhat intentional:
* there are many ways to deploy a wsgi application and we'd like the
packagers and deployers to choose a way that works best for them,
not impose one, and there's no way for us to document them all. It
is better to point to resources that explain some of the options
and allow people to inform themselves so they can make informed
choices
* we're no longer that keen on the mod_wsgi, but it tends to be the
easiest to document (fewer moving parts)
* the uwsgi+systemd method in devstack, while great, is abstracted
enough that the moving parts are not entirely visible and is one
of several ways for that scenario
Change-Id: Ief07c313e012df63558de632047258e8e11736c1
Related-Bug: #1692375
Now that we have a placement api-ref getting published, we
should link to it like we do for the compute api-ref. This
also links in the placement microversion history for consistency.
Change-Id: Id0c70486c5a72a4d6794d80d350a45a5f356ca37
This provides a more detailed, but still high level, explanation
of how the FilterScheduler is using allocation candidates to pick
hosts during scheduling, and how the allocations are handled during
a move operation, including a resize to the same host.
Ideally this content will live somewhere else in the devref, or
would be updated in the spec for blueprint placement-claims, but
for now this should suffice for Pike release notes that can point
at this upgrade doc.
Change-Id: I274c684f829bc310ebb17faabf498d36f4ceea0c
Per the spec [1]:
user/ – end-user content such as concept guides, advice, tutorials,
step-by-step instructions for using the CLI to perform specific tasks,
etc.
The remaining content all ends up in here.
[1] specs.openstack.org/openstack/docs-specs/specs/pike/os-manuals-migration
Change-Id: I480eee9cd7568efe2f76dd185004774588eb4a99
Matt Riedemann