Let resource_tracker report right migration status

A shutoff instance can be resized, but resource_tracker only think
active instance is in migration state. This patch let it report
right migration status.

Closes-Bug: #1247610

Change-Id: Ic6ce9c7d8fdecaf812831eb302186133f0ee71b1
add hints to api_samples documentation

Based on my own experience and questions I recently answered in
the openstack-nova channel, these hints could help developers.

Change-Id: Id7350f1a6a834b0de8456fdc28c2db890f2971de
baremetal: Make volume driver use a correct source device

attach_volume() have to take the source device path from returning of
LibVirtVolumeDriver.connect_volume() rather than connection_info.

It also adds a test for attach_volume().

Change-Id: I3bee80560342104e2df614066301171624497a04
Closes-Bug: #1208707
Allow configuring the wsgi pool size

Expose the number of greenthreads in wsgi pool to configuration. This
allows to put a limit to the number of resources like memcache
connections used.

DocImpact
Change-Id: I6e53d6e12661ed2f42a6b543891b13eec0c8300c
Fix AttributeError(s) from get_v4/6_ips_by_interface

Add some defensive code to prevent AttributeError especially
when virtual_interface_get_by_uuid returns None. Add some basic
tests for good and bad data returned from
virtual_interface_get_by_uuid

Change-Id: I0ee1bb2087a6ed2619ac343534e4ade84e08d9bd
Closes-Bug: 1246087
Remove used_limits extension from the V3 API

Remove the used_limits extension from the V3 API because
it shows usage for limits which are no longer going to be displayed
by the limits extension. See https://review.openstack.org/#/c/39872/
The limits are not being displayed there because they are already
available through the quotas extension.

Although the quotas extension currently only displays the quota limit
and not usage, the following proposed changeset adds display
of usage: https://review.openstack.org/#/c/32303/. And this is done
in a way which is much more consistent in terms of naming and interface
than used_limits does.

So we no longer need the used_limits extension

Partially implements blueprint nova-v3-api

Change-Id: I8ec1f300335ca4fc3b86323cc3af6bc1591da7bb
Fix limits v3 follow API v3 rules

* Add expected_errors decorator.
* Remove 'absolute_limit' from response, that already return by
extension quota_sets. And update api samples.

Partially implements bp nova-v3-api

Change-Id: Iea3ff494b8abed77fdc4b9e5e552784ed3733c34
Use 400 instead of 422 for invalid input in v3 servers core

We return 400 when input is invalid for v3 api. This patch fix
this case for servers core.

DocImpact

Change-Id: If802d4dcba6ed25f7e9cb9d568a3ffd78f0f6c68
Closes-Bug: 1251538
Update openstack/common/lockutils

The following commits are in this update:

79e6bc6 fix lockutils.lock() to make it thread-safe
ace5120 Add main() to lockutils that creates temp dir for locks
537d8e2 Allow lockutils to get lock_path conf from envvar

Change-Id: I2190d0aae72ef4a29daf8f7d960da82a33b331b4
Enforce metadata string type on key/value pairs

The compute API is currently enforcing quota limits for user metadata
and length restrictions on the dict entries, but is not enforcing that
they are string types. This patch adds the checks for string type on the
keys and values in the metadata dict.

Closes-Bug: #1240319

Change-Id: Ic4aacc342cf37d929871287e6e4917f4f48b63e8
Use 201 instead of 200 for action create of flavor-manage v3

All of v3 create action should return 201. Fix this for flavor-manage v3

Closes-bug: 1252162
DocImpact

Change-Id: I4fc698abdf89c93cb6ea0990ae43960f8c651d95
Update openstack/common/periodic_task

The following commits are in this update:

1771a77 Adjust import order according to PEP8 imports rule
4bfb7a2 Apply six for metaclass
0ea069e Removed calls to locals()
1a2df89 Enable H302 hacking check

Change-Id: I5d15d9772002a2f764acef16e28bcfa16a9760c0
Remove deprecated instance_type alias from nova-manage

Was deprecated in Havana, so now that we are in Icehouse lets
remove it.

UpgradeImpact
Change-Id: Ieb3775e0a43084d00624f9e1d8b879c312e32b3c
Clean up unused variables

This just removes a few variables that were unused and makes my linter
happy.

Change-Id: I0bc9fc1474e15801e4df84f78636c96ea1f916ff
Fix sample parameter of agent API

The parameter of agent update API has been changed from "para" to
"agent" since Nova v3 API, and this patch fixes the sample doc.

Partially implements blueprint v3-api-specification

Change-Id: Ic9c0f11a637e48daa9457ab9ae923fefc0fb350d
Libvirt:Instance resize confirm issue against NFS

when I test resize-confirm on NFS (KVM) using at least two
compute nodes, OSError will occur when try to cleanup the
backup instance directory and will make instance status
"Error".

One way to cleanup resize is using delay_on_retry and
maximum attempts setting. Replace rmtree() because
execute() have more parameters choices.

Closes-Bug: #1248019

Change-Id: Ifb9a500bbba805af0317307c2e7d6903dcd02ad1
Fix empty selector XML bug

The XML serialization fails when it's trying to create a datum selector with no
values. In that case the obj is an empty string so the selection of datum from
it just fails.
Instead of raising an exception the fix is returning an empty string, that
allows to serialize Selector with an empty object.

Fixes bug 1223358

Change-Id: If5d564c9b037eb0a107f4688ffa1aceb5281dc42
VMware: Always upload a snapshot as a preallocated disk

Currently, a snapshot operation always produces a preallocated
disk type. When the snapshot is uploaded to glance, the source
image metadata is uploaded with the new snapshot and then some
of the metadata properties are updated. The update doesn't
include the disk_type property, this can be problematic. If
the original image has a sparse disk type and a snapshot is
taken, then the snapshot which is a preallocated disk type is
uploaded to glance with the disk_type property set to sparse,
which creates a disk type mismatch and causes errors when a vm
is spawned from that snapshot. This patch addresses the issue
by correcting the image metadata used when uploading a snapshot
to glance.

Also, the image_upload function in vmwareapi/fake.py has been
modified to address the change. Any function call to
image_upload (from the unit tests) will assert that the
metadata for the image to be uploaded must have the disk_type
value to be preallocated.

Closes-Bug: 1247296
Change-Id: I71cfa8d4d1eb7911abb489153292fb0d1e614765
Clean up how test env variables are parsed

Oslo and cookiecutter and other projects were using
variable to parse test environment vaiables. Let us
do this in Nova

This is copied from 739627bf79619f8 Use cleaner version from
cookiecutter OpenStack template

Change-Id: I4c2b4072981985e7632fc775ffc98216fbfc0508
Fixes get_vm_storage_paths issue for Hyper-V V2 API

Add get_vm_storage_paths function to vmutilsv2.py

get_vm_storage_paths implementation on Hyper-V V2 API changed
compared to previous V1 API. In previous V1 APIs, using
Msvm_ResourceAllocationSettingData class can get storage
paths, but in V2 API, only using Msvm_StorageAllocationSettingData
class can get the storage paths.

Closes-Bug: #1248463

Change-Id: Ica73221524f162a6ffcd9dc64ee33c85fb5ad31d