xenapi: Tag volumes in boot from volume case

Fixes bug 1064134

Since https://review.openstack.org/#/c/10574, we require that all
openstack volumes are tagged, so as to distinguish them from other
disks that could be deleted on instance termination.

Change-Id: I965f88bf41d39be88f2331ad081f5cec71a65a0f
Change install_venv to use setup.py develop.

With the potential use of entry points, code from the current tree needs to
be installed into a venv created by install_venv.py via setup.py develop.
This will ensure that the appropriate meta-data and paths are set in the
virtualenv.

Change-Id: I1ca15959c98a24629d2f5b2c385296c4e2fe770c
xenapi: fix bfv behavior when SR is not attached

Fixes bug 1063920
If we try to boot from volume right after a detach volume operation
on the xensm volume driver, the SR has been disconnected. This results
in a failure to populate the vdis list. Introducing the SR if it
isn't in the xapi db fixes this.

Change-Id: I7e6b5e643ea3e20ba691141950cddfcb0ab5f3b8
Add DNS records on IP allocation in VlanManager.

Change-Id: If13f5d2902905154ce4753a45e5d5369d1bf68af
Use instance_exists to check existence

Use instance_exists instead of list_instances since commit 27c11c4bb4.

Change-Id: I780e70f6b573a15e4acc71af16695e0db8ad2581
Add Server diagnostics extension api samples

Change-Id: Id53e17caa75dcab01dd3209f771891b4e92debec
Fix error on invalid delete_on_termination value

1. Fixed 500 error when an invalid value is passed to 'delete_on_termination'
parameter in 'block_device_mapping' of create server API (json request).
Converted the value to 'bool' (similar to XML request workflow) to fix issue.
2. Also added unit test coverage.

Fixes LP: #1060955

Change-Id: Ib35040f17a3712dac45ec1e3c2f32fee17db7c03
Declare vpn client option in pipelib

Due to some import refactoring, nova.network.manager isn't always
imported when running pipelib commands, so using the cnt_vpn_clients
option fails. A failing test could not be added because our testing
code imports nova.network.manager so the code config option always
exists in testing.

Fixes bug 1069573

Change-Id: I92b702556bfef2610b86a952dd6f9207fbab102a
Fix and enable pep8 E502, E712

pep8 E502 and E712 were temporarily disabld when upgrading to pep8 1.2

Change-Id: If5158304cb8e73ef844dea9f726df6f8fe305269
Fix the fail-on-zero-tests case so that it is tolerant of no output

Some ways of running run_tests.sh will not output a line for us to
parse the count from. Treat no "Ran X tests" as "Ran 0 tests".

Change-Id: I96ba13e797ceaf9b9fa2b60ccb558510b5e32a88
nova-compute sends its capabilities to schedulers ASAP

Fixes Bug 1068114.

When a nova-compute runs for the first time, after an entry in
compute_nodes table is created, it takes some time for the
capabilities to be sent to schedulers. It may make the schedulers
send unacceptable requests to the nova-compute. This patch eliminates
it by sending the capabilities before creating the entry in compute_node.

Change-Id: Id9851d9a6f0305256dfa6dfb63ab508e6f519fa2
limit the usage of connection_info

Related to blueprint xenapi-volume-drivers

The connection_info parameter, that is coming from volume contains only
two keys, 'driver_volume_type', and 'data'.
See:
https://github.com/openstack/nova/blob/master/nova/volume/manager.py#L375

parse_volume_info was checking the connection_info for 'auth_method',
and authentication parameters. These informations live inside
connection_data. This patch is fixing this, and covering with a test.

Also rename the generic data variable to connection_data, to make it
easier to read the code.

parse_volume_info thus no longer depends on the whole connection_info,
only on the connection_data.

Also clean-up some copy-paste test setup code.

Change-Id: I5289120d46176c8528c3317a650269c4f384f930
Remove mountpoint from parse_volume_info

Related to blueprint xenapi-volume-drivers

parse_volume_info method did too many things. It was checking the
connection_data for iscsi information, and also checked the mountpoint.
This change extracts the mountpoint conversion, and performs that check
earlier in the volume attach process.

Change-Id: I7c26e813319f6d9de287782ad188b22804d032a9
SanISCSIDriver SSH execution fixes.

In ssh_execute methon in nova/utils there was a problem with cmd passed to it.
From SanISCSIDriver and all other places it is called from cmd is a string.
But in ssh_execute method cmd was processed as a list. This can make problems
with SanISCSIdriver using.

Also it may be useful to pass execute parameter to this SanISCSIDriver class
to have the opportunity of overriding _execute method (as it is in
VolumeDriver class, that is the root of this class hierarchy). That's why
special checking was added.

Fixes bug 1070489

Change-Id: I73f74f9d095a2c4316cab88148afe6a0bde44c5b
Remove is_admin_context from sqlalchemy.api

is_admin_context was used to detect deprecated empty contexts,
and was last updated in 2010

Change-Id: I06c61d6a508bef7ea30054a6f1df3fe6b2d6dfd8
More specific exception handling in migration 091.

The original code would catch and discard any exception generated when
trying to create or drop fkey constraints using the SQLite engine. This
has the side-effect of allowing the DB to become inconsistent (by
leaving a `migration_tmp` table around), causing future migrations to
fail and making bugs even hard to track down.

Long term, we should fix the underlying cause of these exceptions,
either by switching to Alembic or by fixing SQLALchemy-Migrate to fully
support dropping of constraints via a temp table.

For now though, tightening up the exception handling will at least make
any future bugs a bit easier to diagnose.

Fixes bug 1070559

Change-Id: If549d65afa758b6f8a0db6fc8478a5b0c9277e23
Remove deprecated root_helper config

root_helper was deprecated in Folsom and was replaced by rootwrap_config

Change-Id: Ia2f5e67f834c01c07272c61323d01599006b7018
Handle the case where we encounter a snap shot correctly.

Fix the list in the qemu output and break out of the loop
when we encounter that instead of failing to parse.

Fixes bug 1070088.

Change-Id: I5f501c599b94e0ac13892c97d60ec740ac7e641d
Don't require quantumclient when running nova-api.

Handle ImportErrors's when importing the quantumv2 API
in the Nova API servers controller. This makes it possible
to run nova-api when quantumclient is not present.

This was recently broken in commit 83a8418 which changed how we
import the quantum v2 API class.

Fixes LP Bug #1070509.

Change-Id: I3c452c3bd88cb5b431cb23e525ff78e3d677e1a8
Fix Incorrect Exception when metadata is over 255 characters

Need to be in sync with Essex. Throw a new exception in api.py when key or value
is over 255 chars. Catch this exception end return back HTTP error 413.

add extra lines in exception.py to make pep8 happy

Fixes bug 1004007

Change-Id: I67694e3a9600b7dd0b80c519327327568751c2a4