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Make --flavor-id mandatory in 'snf-manage server-create' management
command.

Update 'network-create' management command, to require an owner when
creating a private network.

State of public NIC should be 'BUILDING'

Use urlparse.urljoin create the config url in order to avoid extra '/'.

Fix deadlock when creating a server that was introduced by commit
501053a. Allocating the public IP in the same transaction with creating
the server resulted in a deadlock with backend allocator, because
inserting the new VM in the database waits on an exclusive lock of the
backend (foreign key).

Everything should point to http://www.synnefo.org/*
This patch updates the URL everywhere in the repo.

When creating a server, do not reserve a public IP address before
issuing commission to quotaholder. This bug resulted in unsynchronized
IP pools between Cyclades and Ganeti, and needed external
reconciliation to synchronize them.

Refs #3570

Make image-show management command to show information about an image
without passing a userid. Use 'image_list' command of ImageBackend
instead of 'get_image' because the second one will raise Forbidden for
non-public images.

Also make command to use 'pprint_table' to print image info.

Correct usage of 'update_object_meta' function to remove all metadata
from plankton domain. Use an empty dictionary with replace=True.

Refs #3522

Modify 'add_image' plankton API method, to check that location parameter
is a valid Pithos url, and raise BadRequest if not.

Until now 'snf-manage image-list' management command printed only images
that were public, or accessible by a specific user. This commit changes
this command to print all images (regardless of the owner).

Use '_get_domain_objects' function of Pithos backend, to list all
objects in a 'plankton' domain, instead of looping over all accessible
accounts, containers and objects. This function also returns metadata
and permissions for each object in order to avoid two extra calls for
each returned image.

This should provide a significant performance boost in listing available
images.

Note: Currently plankton API filters in 'list_images' are not
implemented.

Refs #3510

Major refactor in plankton APP and ImageBackend code:
* Remove unused code
* Remove 'plankton_method' decorator that added an ImageBackend to
  requests an replace it with 'image_backend' context manager. This
  context manager is responsible for opening and closing connections
  to PithosBackend and converting ImageBackend errors to cloud faults.
* Update plankton and images API methods and tests.

Do not run 'backend-add' command inside transaction, because if
'snf-dispatcher' is running, it will receive messages that will arrive
from a Ganeti backend that does not exist in the DB and will not be able
to process them.

Rename 'PITHOS_AUTHENTICATION_URL' setting to 'ASTAKOS_URL'. Also remove
'PITHOS_AUTHENTICATION_USERS' from docs (it was removed from code in
commit 8df4fae).

Modify 'ASTAKOS_URL' to point to the node hosting the Astakos service
instead of im endpoint, i.e. rename from
'accounts.example.org/im/authenticate' to 'accounts.example.org'.

use the new synnefo.user method `get_username` to populate
personal/shared images.

Since v0.13, all Synnefo components will have the same version and the
same Changelog, NEWS, Upgrade, Copyright file. This patch addresses
old Changelog, NEWS and Upgrade files:

 * Move all separate Changelog files under docs/older/
 * Move all separate Upgrade files under docs/older/
 * Add skeleton for the new, single, unified Changelog file
 * Add skeleton for the new, single, unified NEWS file

Copyright files will follow with a separate patch.

Use the python-objpool package for pooling resources as object, instead
of the pooling code that existed in snf-common ('synnefo.lib.pool')

Refs #3524

Update all pithos API methods to use the new common 'api_method'
decorator. However, this decorator is not enough for pithos since
pithos methods require some extra tasks:
* Create a PithosBackend connection
* Handle special HTTP headers

For these reasons, pithos defines a custom 'api_method' decorator, which
is decorator by the common 'api_method' decorator.

Update Cyclades API methods to use the new common 'api_method'
decorator. Also, update all the relevant tests.

Use the common 'api_method' decorator in all plankton API methods.
Modify the 'plankton_method' decorator to only create and close
the ImageBackend.

Refs #3359

Handle these errors explicitly in the code instead of the "api_method"
decorator.

Gather all faults from all synnefo projects into common
'snf_django.lib.api.faults'.

Plankton backend raised AssertionError when an Image was not found.
Change this to raise faults.ItemNotFound error. Temporary commit
until common API decorator is implemented.

Refs #3356

Until now, deleting an image resulted in deletion of the corresponding
file from Pithos. Plankton Images are files in Pithos with special
metadata on the 'plankton' metadata domain. Adding an Image to plankton
is equivalent with adding some special metadata in this domain. In the
same way, this commit implements Image deletion by deleting these
metadata, and retaining the original file in Pithos.

Refs #3522

Do not use a default value (was "MAC_FILTERED") for "type" parameter of
"network_create" API method. The client must explicitly choose the
network type.