# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
OpenStack driver
"""

try:
    import simplejson as json
except ImportError:
    import json

try:
    from lxml import etree as ET
except ImportError:
    from xml.etree import ElementTree as ET

import warnings
import base64

from libcloud.utils.py3 import httplib
from libcloud.utils.py3 import b
from libcloud.utils.py3 import next
from libcloud.utils.py3 import urlparse


from libcloud.common.openstack import OpenStackBaseConnection
from libcloud.common.openstack import OpenStackDriverMixin
from libcloud.common.openstack import OpenStackException
from libcloud.common.openstack import OpenStackResponse
from libcloud.utils.networking import is_public_subnet
from libcloud.compute.base import NodeSize, NodeImage
from libcloud.compute.base import (NodeDriver, Node, NodeLocation,
                                   StorageVolume, VolumeSnapshot)
from libcloud.compute.base import KeyPair
from libcloud.compute.types import NodeState, Provider
from libcloud.pricing import get_size_price
from libcloud.utils.xml import findall

__all__ = [
    'OpenStack_1_0_Response',
    'OpenStack_1_0_Connection',
    'OpenStack_1_0_NodeDriver',
    'OpenStack_1_0_SharedIpGroup',
    'OpenStack_1_0_NodeIpAddresses',
    'OpenStack_1_1_Response',
    'OpenStack_1_1_Connection',
    'OpenStack_1_1_NodeDriver',
    'OpenStack_1_1_FloatingIpPool',
    'OpenStack_1_1_FloatingIpAddress',
    'OpenStackNodeDriver'
]

ATOM_NAMESPACE = "http://www.w3.org/2005/Atom"

DEFAULT_API_VERSION = '1.1'


class OpenStackComputeConnection(OpenStackBaseConnection):
    # default config for http://devstack.org/
    service_type = 'compute'
    service_name = 'nova'
    service_region = 'RegionOne'


class OpenStackNodeDriver(NodeDriver, OpenStackDriverMixin):
    """
    Base OpenStack node driver. Should not be used directly.
    """
    api_name = 'openstack'
    name = 'OpenStack'
    website = 'http://openstack.org/'

    NODE_STATE_MAP = {
        'BUILD': NodeState.PENDING,
        'REBUILD': NodeState.PENDING,
        'ACTIVE': NodeState.RUNNING,
        'SUSPENDED': NodeState.STOPPED,
        'SHUTOFF': NodeState.STOPPED,
        'DELETED': NodeState.TERMINATED,
        'QUEUE_RESIZE': NodeState.PENDING,
        'PREP_RESIZE': NodeState.PENDING,
        'VERIFY_RESIZE': NodeState.RUNNING,
        'PASSWORD': NodeState.PENDING,
        'RESCUE': NodeState.PENDING,
        'REBOOT': NodeState.REBOOTING,
        'HARD_REBOOT': NodeState.REBOOTING,
        'SHARE_IP': NodeState.PENDING,
        'SHARE_IP_NO_CONFIG': NodeState.PENDING,
        'DELETE_IP': NodeState.PENDING,
        'ERROR': NodeState.ERROR,
        'UNKNOWN': NodeState.UNKNOWN
    }

    def __new__(cls, key, secret=None, secure=True, host=None, port=None,
                api_version=DEFAULT_API_VERSION, **kwargs):
        if cls is OpenStackNodeDriver:
            if api_version == '1.0':
                cls = OpenStack_1_0_NodeDriver
            elif api_version == '1.1':
                cls = OpenStack_1_1_NodeDriver
            else:
                raise NotImplementedError(
                    "No OpenStackNodeDriver found for API version %s" %
                    (api_version))
        return super(OpenStackNodeDriver, cls).__new__(cls)

    def __init__(self, *args, **kwargs):
        OpenStackDriverMixin.__init__(self, **kwargs)
        super(OpenStackNodeDriver, self).__init__(*args, **kwargs)

    def destroy_node(self, node):
        uri = '/servers/%s' % (node.id)
        resp = self.connection.request(uri, method='DELETE')
        # The OpenStack and Rackspace documentation both say this API will
        # return a 204, but in-fact, everyone everywhere agrees it actually
        # returns a 202, so we are going to accept either, and someday,
        # someone will fix either the implementation or the documentation to
        # agree.
        return resp.status in (httplib.NO_CONTENT, httplib.ACCEPTED)

    def reboot_node(self, node):
        return self._reboot_node(node, reboot_type='HARD')

    def list_nodes(self, ex_all_tenants=False):
        """
        List the nodes in a tenant

        :param ex_all_tenants: List nodes for all the tenants. Note: Your user
                               must have admin privileges for this
                               functionality to work.
        :type ex_all_tenants: ``bool``
        """
        params = {}
        if ex_all_tenants:
            params = {'all_tenants': 1}
        return self._to_nodes(
            self.connection.request('/servers/detail', params=params).object)

    def create_volume(self, size, name, location=None, snapshot=None):
        if snapshot:
            raise NotImplementedError(
                "create_volume does not yet support create from snapshot")
        resp = self.connection.request('/os-volumes',
                                       method='POST',
                                       data={
                                           'volume': {
                                               'display_name': name,
                                               'display_description': name,
                                               'size': size,
                                               'volume_type': None,
                                               'metadata': {
                                                   'contents': name,
                                               },
                                               'availability_zone': location,
                                           }
                                       })
        return self._to_volume(resp.object)

    def destroy_volume(self, volume):
        return self.connection.request('/os-volumes/%s' % volume.id,
                                       method='DELETE').success()

    def attach_volume(self, node, volume, device="auto"):
        # when "auto" or None is provided for device, openstack will let
        # the guest OS pick the next available device (fi. /dev/vdb)
        return self.connection.request(
            '/servers/%s/os-volume_attachments' % node.id,
            method='POST',
            data={
                'volumeAttachment': {
                    'volumeId': volume.id,
                    'device': device,
                }
            }).success()

    def detach_volume(self, volume, ex_node=None):
        # when ex_node is not provided, volume is detached from all nodes
        failed_nodes = []
        for attachment in volume.extra['attachments']:
            if not ex_node or ex_node.id == attachment['serverId']:
                response = self.connection.request(
                    '/servers/%s/os-volume_attachments/%s' %
                    (attachment['serverId'], attachment['id']),
                    method='DELETE')

                if not response.success():
                    failed_nodes.append(attachment['serverId'])
        if failed_nodes:
            raise OpenStackException(
                'detach_volume failed for nodes with id: %s' %
                ', '.join(failed_nodes), 500, self
            )
        return True

    def list_volumes(self):
        return self._to_volumes(
            self.connection.request('/os-volumes').object)

    def ex_get_volume(self, volumeId):
        return self._to_volume(
            self.connection.request('/os-volumes/%s' % volumeId).object)

    def list_images(self, location=None, ex_only_active=True):
        """
        Lists all active images

        @inherits: :class:`NodeDriver.list_images`

        :param ex_only_active: True if list only active
        :type ex_only_active: ``bool``

        """
        return self._to_images(
            self.connection.request('/images/detail').object, ex_only_active)

    def get_image(self, image_id):
        """
        Get an image based on an image_id

        @inherits: :class:`NodeDriver.get_image`

        :param image_id: Image identifier
        :type image_id: ``str``

        :return: A NodeImage object
        :rtype: :class:`NodeImage`

        """
        return self._to_image(self.connection.request(
            '/images/%s' % (image_id,)).object['image'])

    def list_sizes(self, location=None):
        return self._to_sizes(
            self.connection.request('/flavors/detail').object)

    def list_locations(self):
        return [NodeLocation(0, '', '', self)]

    def _ex_connection_class_kwargs(self):
        return self.openstack_connection_kwargs()

    def ex_get_node_details(self, node_id):
        """
        Lists details of the specified server.

        :param       node_id: ID of the node which should be used
        :type        node_id: ``str``

        :rtype: :class:`Node`
        """
        # @TODO: Remove this if in 0.6
        if isinstance(node_id, Node):
            node_id = node_id.id

        uri = '/servers/%s' % (node_id)
        resp = self.connection.request(uri, method='GET')
        if resp.status == httplib.NOT_FOUND:
            return None

        return self._to_node_from_obj(resp.object)

    def ex_soft_reboot_node(self, node):
        """
        Soft reboots the specified server

        :param      node:  node
        :type       node: :class:`Node`

        :rtype: ``bool``
        """
        return self._reboot_node(node, reboot_type='SOFT')

    def ex_hard_reboot_node(self, node):
        """
        Hard reboots the specified server

        :param      node:  node
        :type       node: :class:`Node`

        :rtype: ``bool``
        """
        return self._reboot_node(node, reboot_type='HARD')


class OpenStackNodeSize(NodeSize):
    """
    NodeSize class for the OpenStack.org driver.

    Following the example of OpenNebula.org driver
    and following guidelines:
    https://issues.apache.org/jira/browse/LIBCLOUD-119
    """

    def __init__(self, id, name, ram, disk, bandwidth, price, driver,
                 vcpus=None):
        super(OpenStackNodeSize, self).__init__(id=id, name=name, ram=ram,
                                                disk=disk,
                                                bandwidth=bandwidth,
                                                price=price, driver=driver)
        self.vcpus = vcpus

    def __repr__(self):
        return (('<OpenStackNodeSize: id=%s, name=%s, ram=%s, disk=%s, '
                 'bandwidth=%s, price=%s, driver=%s, vcpus=%s,  ...>')
                % (self.id, self.name, self.ram, self.disk, self.bandwidth,
                   self.price, self.driver.name, self.vcpus))


class OpenStack_1_0_Response(OpenStackResponse):
    def __init__(self, *args, **kwargs):
        # done because of a circular reference from
        # NodeDriver -> Connection -> Response
        self.node_driver = OpenStack_1_0_NodeDriver
        super(OpenStack_1_0_Response, self).__init__(*args, **kwargs)


class OpenStack_1_0_Connection(OpenStackComputeConnection):
    responseCls = OpenStack_1_0_Response
    default_content_type = 'application/xml; charset=UTF-8'
    accept_format = 'application/xml'
    XML_NAMESPACE = 'http://docs.rackspacecloud.com/servers/api/v1.0'


class OpenStack_1_0_NodeDriver(OpenStackNodeDriver):
    """
    OpenStack node driver.

    Extra node attributes:
        - password: root password, available after create.
        - hostId: represents the host your cloud server runs on
        - imageId: id of image
        - flavorId: id of flavor
    """
    connectionCls = OpenStack_1_0_Connection
    type = Provider.OPENSTACK

    features = {'create_node': ['generates_password']}

    def __init__(self, *args, **kwargs):
        self._ex_force_api_version = str(kwargs.pop('ex_force_api_version',
                                                    None))
        self.XML_NAMESPACE = self.connectionCls.XML_NAMESPACE
        super(OpenStack_1_0_NodeDriver, self).__init__(*args, **kwargs)

    def _to_images(self, object, ex_only_active):
        images = []
        for image in findall(object, 'image', self.XML_NAMESPACE):
            if ex_only_active and image.get('status') != 'ACTIVE':
                continue
            images.append(self._to_image(image))

        return images

    def _to_image(self, element):
        return NodeImage(id=element.get('id'),
                         name=element.get('name'),
                         driver=self.connection.driver,
                         extra={'updated': element.get('updated'),
                                'created': element.get('created'),
                                'status': element.get('status'),
                                'serverId': element.get('serverId'),
                                'progress': element.get('progress'),
                                'minDisk': element.get('minDisk'),
                                'minRam': element.get('minRam')
                                }
                         )

    def _change_password_or_name(self, node, name=None, password=None):
        uri = '/servers/%s' % (node.id)

        if not name:
            name = node.name

        body = {'xmlns': self.XML_NAMESPACE,
                'name': name}

        if password is not None:
            body['adminPass'] = password

        server_elm = ET.Element('server', body)

        resp = self.connection.request(
            uri, method='PUT', data=ET.tostring(server_elm))

        if resp.status == httplib.NO_CONTENT and password is not None:
            node.extra['password'] = password

        return resp.status == httplib.NO_CONTENT

    def create_node(self, **kwargs):
        """
        Create a new node

        @inherits: :class:`NodeDriver.create_node`

        :keyword    ex_metadata: Key/Value metadata to associate with a node
        :type       ex_metadata: ``dict``

        :keyword    ex_files:   File Path => File contents to create on
                                the node
        :type       ex_files:   ``dict``

        :keyword    ex_shared_ip_group_id: The server is launched into
            that shared IP group
        :type       ex_shared_ip_group_id: ``str``
        """
        name = kwargs['name']
        image = kwargs['image']
        size = kwargs['size']

        attributes = {'xmlns': self.XML_NAMESPACE,
                      'name': name,
                      'imageId': str(image.id),
                      'flavorId': str(size.id)}

        if 'ex_shared_ip_group' in kwargs:
            # Deprecate this. Be explicit and call the variable
            # ex_shared_ip_group_id since user needs to pass in the id, not the
            # name.
            warnings.warn('ex_shared_ip_group argument is deprecated.'
                          ' Please use ex_shared_ip_group_id')

        if 'ex_shared_ip_group_id' in kwargs:
            shared_ip_group_id = kwargs['ex_shared_ip_group_id']
            attributes['sharedIpGroupId'] = shared_ip_group_id

        server_elm = ET.Element('server', attributes)

        metadata_elm = self._metadata_to_xml(kwargs.get("ex_metadata", {}))
        if metadata_elm:
            server_elm.append(metadata_elm)

        files_elm = self._files_to_xml(kwargs.get("ex_files", {}))
        if files_elm:
            server_elm.append(files_elm)

        resp = self.connection.request("/servers",
                                       method='POST',
                                       data=ET.tostring(server_elm))
        return self._to_node(resp.object)

    def ex_set_password(self, node, password):
        """
        Sets the Node's root password.

        This will reboot the instance to complete the operation.

        :class:`Node.extra['password']` will be set to the new value if the
        operation was successful.

        :param      node: node to set password
        :type       node: :class:`Node`

        :param      password: new password.
        :type       password: ``str``

        :rtype: ``bool``
        """
        return self._change_password_or_name(node, password=password)

    def ex_set_server_name(self, node, name):
        """
        Sets the Node's name.

        This will reboot the instance to complete the operation.

        :param      node: node to set name
        :type       node: :class:`Node`

        :param      name: new name
        :type       name: ``str``

        :rtype: ``bool``
        """
        return self._change_password_or_name(node, name=name)

    def ex_resize(self, node, size):
        """
        Change an existing server flavor / scale the server up or down.

        :param      node: node to resize.
        :type       node: :class:`Node`

        :param      size: new size.
        :type       size: :class:`NodeSize`

        :rtype: ``bool``
        """
        elm = ET.Element(
            'resize',
            {'xmlns': self.XML_NAMESPACE,
             'flavorId': str(size.id)}
        )

        resp = self.connection.request("/servers/%s/action" % (node.id),
                                       method='POST',
                                       data=ET.tostring(elm))
        return resp.status == httplib.ACCEPTED

    def ex_confirm_resize(self, node):
        """
        Confirm a resize request which is currently in progress. If a resize
        request is not explicitly confirmed or reverted it's automatically
        confirmed after 24 hours.

        For more info refer to the API documentation: http://goo.gl/zjFI1

        :param      node: node for which the resize request will be confirmed.
        :type       node: :class:`Node`

        :rtype: ``bool``
        """
        elm = ET.Element(
            'confirmResize',
            {'xmlns': self.XML_NAMESPACE},
        )

        resp = self.connection.request("/servers/%s/action" % (node.id),
                                       method='POST',
                                       data=ET.tostring(elm))
        return resp.status == httplib.NO_CONTENT

    def ex_revert_resize(self, node):
        """
        Revert a resize request which is currently in progress.
        All resizes are automatically confirmed after 24 hours if they have
        not already been confirmed explicitly or reverted.

        For more info refer to the API documentation: http://goo.gl/AizBu

        :param      node: node for which the resize request will be reverted.
        :type       node: :class:`Node`

        :rtype: ``bool``
        """
        elm = ET.Element(
            'revertResize',
            {'xmlns': self.XML_NAMESPACE}
        )

        resp = self.connection.request("/servers/%s/action" % (node.id),
                                       method='POST',
                                       data=ET.tostring(elm))
        return resp.status == httplib.NO_CONTENT

    def ex_rebuild(self, node_id, image_id):
        """
        Rebuilds the specified server.

        :param       node_id: ID of the node which should be used
        :type        node_id: ``str``

        :param       image_id: ID of the image which should be used
        :type        image_id: ``str``

        :rtype: ``bool``
        """
        # @TODO: Remove those ifs in 0.6
        if isinstance(node_id, Node):
            node_id = node_id.id

        if isinstance(image_id, NodeImage):
            image_id = image_id.id

        elm = ET.Element(
            'rebuild',
            {'xmlns': self.XML_NAMESPACE,
             'imageId': image_id}
        )

        resp = self.connection.request("/servers/%s/action" % node_id,
                                       method='POST',
                                       data=ET.tostring(elm))
        return resp.status == httplib.ACCEPTED

    def ex_create_ip_group(self, group_name, node_id=None):
        """
        Creates a shared IP group.

        :param       group_name:  group name which should be used
        :type        group_name: ``str``

        :param       node_id: ID of the node which should be used
        :type        node_id: ``str``

        :rtype: ``bool``
        """
        # @TODO: Remove this if in 0.6
        if isinstance(node_id, Node):
            node_id = node_id.id

        group_elm = ET.Element(
            'sharedIpGroup',
            {'xmlns': self.XML_NAMESPACE,
             'name': group_name}
        )

        if node_id:
            ET.SubElement(
                group_elm,
                'server',
                {'id': node_id}
            )

        resp = self.connection.request('/shared_ip_groups',
                                       method='POST',
                                       data=ET.tostring(group_elm))
        return self._to_shared_ip_group(resp.object)

    def ex_list_ip_groups(self, details=False):
        """
        Lists IDs and names for shared IP groups.
        If details lists all details for shared IP groups.

        :param       details: True if details is required
        :type        details: ``bool``

        :rtype: ``list`` of :class:`OpenStack_1_0_SharedIpGroup`
        """
        uri = '/shared_ip_groups/detail' if details else '/shared_ip_groups'
        resp = self.connection.request(uri,
                                       method='GET')
        groups = findall(resp.object, 'sharedIpGroup',
                         self.XML_NAMESPACE)
        return [self._to_shared_ip_group(el) for el in groups]

    def ex_delete_ip_group(self, group_id):
        """
        Deletes the specified shared IP group.

        :param       group_id:  group id which should be used
        :type        group_id: ``str``

        :rtype: ``bool``
        """
        uri = '/shared_ip_groups/%s' % group_id
        resp = self.connection.request(uri, method='DELETE')
        return resp.status == httplib.NO_CONTENT

    def ex_share_ip(self, group_id, node_id, ip, configure_node=True):
        """
        Shares an IP address to the specified server.

        :param       group_id:  group id which should be used
        :type        group_id: ``str``

        :param       node_id: ID of the node which should be used
        :type        node_id: ``str``

        :param       ip: ip which should be used
        :type        ip: ``str``

        :param       configure_node: configure node
        :type        configure_node: ``bool``

        :rtype: ``bool``
        """
        # @TODO: Remove this if in 0.6
        if isinstance(node_id, Node):
            node_id = node_id.id

        if configure_node:
            str_configure = 'true'
        else:
            str_configure = 'false'

        elm = ET.Element(
            'shareIp',
            {'xmlns': self.XML_NAMESPACE,
             'sharedIpGroupId': group_id,
             'configureServer': str_configure},
        )

        uri = '/servers/%s/ips/public/%s' % (node_id, ip)

        resp = self.connection.request(uri,
                                       method='PUT',
                                       data=ET.tostring(elm))
        return resp.status == httplib.ACCEPTED

    def ex_unshare_ip(self, node_id, ip):
        """
        Removes a shared IP address from the specified server.

        :param       node_id: ID of the node which should be used
        :type        node_id: ``str``

        :param       ip: ip which should be used
        :type        ip: ``str``

        :rtype: ``bool``
        """
        # @TODO: Remove this if in 0.6
        if isinstance(node_id, Node):
            node_id = node_id.id

        uri = '/servers/%s/ips/public/%s' % (node_id, ip)

        resp = self.connection.request(uri,
                                       method='DELETE')
        return resp.status == httplib.ACCEPTED

    def ex_list_ip_addresses(self, node_id):
        """
        List all server addresses.

        :param       node_id: ID of the node which should be used
        :type        node_id: ``str``

        :rtype: :class:`OpenStack_1_0_NodeIpAddresses`
        """
        # @TODO: Remove this if in 0.6
        if isinstance(node_id, Node):
            node_id = node_id.id

        uri = '/servers/%s/ips' % node_id
        resp = self.connection.request(uri,
                                       method='GET')
        return self._to_ip_addresses(resp.object)

    def _metadata_to_xml(self, metadata):
        if len(metadata) == 0:
            return None

        metadata_elm = ET.Element('metadata')
        for k, v in list(metadata.items()):
            meta_elm = ET.SubElement(metadata_elm, 'meta', {'key': str(k)})
            meta_elm.text = str(v)

        return metadata_elm

    def _files_to_xml(self, files):
        if len(files) == 0:
            return None

        personality_elm = ET.Element('personality')
        for k, v in list(files.items()):
            file_elm = ET.SubElement(personality_elm,
                                     'file',
                                     {'path': str(k)})
            file_elm.text = base64.b64encode(b(v))

        return personality_elm

    def _reboot_node(self, node, reboot_type='SOFT'):
        resp = self._node_action(node, ['reboot', ('type', reboot_type)])
        return resp.status == httplib.ACCEPTED

    def _node_action(self, node, body):
        if isinstance(body, list):
            attr = ' '.join(['%s="%s"' % (item[0], item[1])
                             for item in body[1:]])
            body = '<%s xmlns="%s" %s/>' % (body[0], self.XML_NAMESPACE, attr)
        uri = '/servers/%s/action' % (node.id)
        resp = self.connection.request(uri, method='POST', data=body)
        return resp

    def _to_nodes(self, object):
        node_elements = findall(object, 'server', self.XML_NAMESPACE)
        return [self._to_node(el) for el in node_elements]

    def _to_node_from_obj(self, obj):
        return self._to_node(findall(obj, 'server', self.XML_NAMESPACE)[0])

    def _to_node(self, el):
        def get_ips(el):
            return [ip.get('addr') for ip in el]

        def get_meta_dict(el):
            d = {}
            for meta in el:
                d[meta.get('key')] = meta.text
            return d

        public_ip = get_ips(findall(el, 'addresses/public/ip',
                                    self.XML_NAMESPACE))
        private_ip = get_ips(findall(el, 'addresses/private/ip',
                                     self.XML_NAMESPACE))
        metadata = get_meta_dict(findall(el, 'metadata/meta',
                                         self.XML_NAMESPACE))

        n = Node(id=el.get('id'),
                 name=el.get('name'),
                 state=self.NODE_STATE_MAP.get(
                     el.get('status'), NodeState.UNKNOWN),
                 public_ips=public_ip,
                 private_ips=private_ip,
                 driver=self.connection.driver,
                 extra={
                     'password': el.get('adminPass'),
                     'hostId': el.get('hostId'),
                     'imageId': el.get('imageId'),
                     'flavorId': el.get('flavorId'),
                     'uri': "https://%s%s/servers/%s" % (
                         self.connection.host,
                         self.connection.request_path, el.get('id')),
                     'metadata': metadata})
        return n

    def _to_sizes(self, object):
        elements = findall(object, 'flavor', self.XML_NAMESPACE)
        return [self._to_size(el) for el in elements]

    def _to_size(self, el):
        vcpus = int(el.get('vcpus')) if el.get('vcpus', None) else None
        return OpenStackNodeSize(id=el.get('id'),
                                 name=el.get('name'),
                                 ram=int(el.get('ram')),
                                 disk=int(el.get('disk')),
                                 # XXX: needs hardcode
                                 vcpus=vcpus,
                                 bandwidth=None,
                                 # Hardcoded
                                 price=self._get_size_price(el.get('id')),
                                 driver=self.connection.driver)

    def ex_limits(self):
        """
        Extra call to get account's limits, such as
        rates (for example amount of POST requests per day)
        and absolute limits like total amount of available
        RAM to be used by servers.

        :return: dict with keys 'rate' and 'absolute'
        :rtype: ``dict``
        """

        def _to_rate(el):
            rate = {}
            for item in list(el.items()):
                rate[item[0]] = item[1]

            return rate

        def _to_absolute(el):
            return {el.get('name'): el.get('value')}

        limits = self.connection.request("/limits").object
        rate = [_to_rate(el) for el in findall(limits, 'rate/limit',
                                               self.XML_NAMESPACE)]
        absolute = {}
        for item in findall(limits, 'absolute/limit',
                            self.XML_NAMESPACE):
            absolute.update(_to_absolute(item))

        return {"rate": rate, "absolute": absolute}

    def create_image(self, node, name, description=None, reboot=True):
        """Create an image for node.

        @inherits: :class:`NodeDriver.create_image`

        :param      node: node to use as a base for image
        :type       node: :class:`Node`

        :param      name: name for new image
        :type       name: ``str``

        :rtype: :class:`NodeImage`
        """

        image_elm = ET.Element(
            'image',
            {'xmlns': self.XML_NAMESPACE,
             'name': name,
             'serverId': node.id}
        )

        return self._to_image(
            self.connection.request("/images", method="POST",
                                    data=ET.tostring(image_elm)).object)

    def delete_image(self, image):
        """Delete an image for node.

        @inherits: :class:`NodeDriver.delete_image`

        :param      image: the image to be deleted
        :type       image: :class:`NodeImage`

        :rtype: ``bool``
        """
        uri = '/images/%s' % image.id
        resp = self.connection.request(uri, method='DELETE')
        return resp.status == httplib.NO_CONTENT

    def _to_shared_ip_group(self, el):
        servers_el = findall(el, 'servers', self.XML_NAMESPACE)
        if servers_el:
            servers = [s.get('id')
                       for s in findall(servers_el[0], 'server',
                                        self.XML_NAMESPACE)]
        else:
            servers = None
        return OpenStack_1_0_SharedIpGroup(id=el.get('id'),
                                           name=el.get('name'),
                                           servers=servers)

    def _to_ip_addresses(self, el):
        public_ips = [ip.get('addr') for ip in findall(
            findall(el, 'public', self.XML_NAMESPACE)[0],
            'ip', self.XML_NAMESPACE)]
        private_ips = [ip.get('addr') for ip in findall(
            findall(el, 'private', self.XML_NAMESPACE)[0],
            'ip', self.XML_NAMESPACE)]

        return OpenStack_1_0_NodeIpAddresses(public_ips, private_ips)

    def _get_size_price(self, size_id):
        try:
            return get_size_price(driver_type='compute',
                                  driver_name=self.api_name,
                                  size_id=size_id)
        except KeyError:
            return 0.0


class OpenStack_1_0_SharedIpGroup(object):
    """
    Shared IP group info.
    """

    def __init__(self, id, name, servers=None):
        self.id = str(id)
        self.name = name
        self.servers = servers


class OpenStack_1_0_NodeIpAddresses(object):
    """
    List of public and private IP addresses of a Node.
    """

    def __init__(self, public_addresses, private_addresses):
        self.public_addresses = public_addresses
        self.private_addresses = private_addresses


class OpenStack_1_1_Response(OpenStackResponse):
    def __init__(self, *args, **kwargs):
        # done because of a circular reference from
        # NodeDriver -> Connection -> Response
        self.node_driver = OpenStack_1_1_NodeDriver
        super(OpenStack_1_1_Response, self).__init__(*args, **kwargs)


class OpenStackNetwork(object):
    """
    A Virtual Network.
    """

    def __init__(self, id, name, cidr, driver, extra=None):
        self.id = str(id)
        self.name = name
        self.cidr = cidr
        self.driver = driver
        self.extra = extra or {}

    def __repr__(self):
        return '<OpenStackNetwork id="%s" name="%s" cidr="%s">' % (self.id,
                                                                   self.name,
                                                                   self.cidr,)


class OpenStackSecurityGroup(object):
    """
    A Security Group.
    """

    def __init__(self, id, tenant_id, name, description, driver, rules=None,
                 extra=None):
        """
        Constructor.

        :keyword    id: Group id.
        :type       id: ``str``

        :keyword    tenant_id: Owner of the security group.
        :type       tenant_id: ``str``

        :keyword    name: Human-readable name for the security group. Might
                          not be unique.
        :type       name: ``str``

        :keyword    description: Human-readable description of a security
                                 group.
        :type       description: ``str``

        :keyword    rules: Rules associated with this group.
        :type       rules: ``list`` of
                    :class:`OpenStackSecurityGroupRule`

        :keyword    extra: Extra attributes associated with this group.
        :type       extra: ``dict``
        """
        self.id = id
        self.tenant_id = tenant_id
        self.name = name
        self.description = description
        self.driver = driver
        self.rules = rules or []
        self.extra = extra or {}

    def __repr__(self):
        return ('<OpenStackSecurityGroup id=%s tenant_id=%s name=%s \
        description=%s>' % (self.id, self.tenant_id, self.name,
                            self.description))


class OpenStackSecurityGroupRule(object):
    """
    A Rule of a Security Group.
    """

    def __init__(self, id, parent_group_id, ip_protocol, from_port, to_port,
                 driver, ip_range=None, group=None, tenant_id=None,
                 extra=None):
        """
        Constructor.

        :keyword    id: Rule id.
        :type       id: ``str``

        :keyword    parent_group_id: ID of the parent security group.
        :type       parent_group_id: ``str``

        :keyword    ip_protocol: IP Protocol (icmp, tcp, udp, etc).
        :type       ip_protocol: ``str``

        :keyword    from_port: Port at start of range.
        :type       from_port: ``int``

        :keyword    to_port: Port at end of range.
        :type       to_port: ``int``

        :keyword    ip_range: CIDR for address range.
        :type       ip_range: ``str``

        :keyword    group: Name of a source security group to apply to rule.
        :type       group: ``str``

        :keyword    tenant_id: Owner of the security group.
        :type       tenant_id: ``str``

        :keyword    extra: Extra attributes associated with this rule.
        :type       extra: ``dict``
        """
        self.id = id
        self.parent_group_id = parent_group_id
        self.ip_protocol = ip_protocol
        self.from_port = from_port
        self.to_port = to_port
        self.driver = driver
        self.ip_range = ''
        self.group = {}

        if group is None:
            self.ip_range = ip_range
        else:
            self.group = {'name': group, 'tenant_id': tenant_id}

        self.tenant_id = tenant_id
        self.extra = extra or {}

    def __repr__(self):
        return ('<OpenStackSecurityGroupRule id=%s parent_group_id=%s \
                ip_protocol=%s from_port=%s to_port=%s>' % (self.id,
                self.parent_group_id, self.ip_protocol, self.from_port,
                self.to_port))


class OpenStackKeyPair(object):
    """
    A KeyPair.
    """

    def __init__(self, name, fingerprint, public_key, driver, private_key=None,
                 extra=None):
        """
        Constructor.

        :keyword    name: Name of the KeyPair.
        :type       name: ``str``

        :keyword    fingerprint: Fingerprint of the KeyPair
        :type       fingerprint: ``str``

        :keyword    public_key: Public key in OpenSSH format.
        :type       public_key: ``str``

        :keyword    private_key: Private key in PEM format.
        :type       private_key: ``str``

        :keyword    extra: Extra attributes associated with this KeyPair.
        :type       extra: ``dict``
        """
        self.name = name
        self.fingerprint = fingerprint
        self.public_key = public_key
        self.private_key = private_key
        self.driver = driver
        self.extra = extra or {}

    def __repr__(self):
        return ('<OpenStackKeyPair name=%s fingerprint=%s public_key=%s ...>'
                % (self.name, self.fingerprint, self.public_key))


class OpenStack_1_1_Connection(OpenStackComputeConnection):
    responseCls = OpenStack_1_1_Response
    accept_format = 'application/json'
    default_content_type = 'application/json; charset=UTF-8'

    def encode_data(self, data):
        return json.dumps(data)


class OpenStack_1_1_NodeDriver(OpenStackNodeDriver):
    """
    OpenStack node driver.
    """
    connectionCls = OpenStack_1_1_Connection
    type = Provider.OPENSTACK

    features = {"create_node": ["generates_password"]}
    _networks_url_prefix = '/os-networks'

    def __init__(self, *args, **kwargs):
        self._ex_force_api_version = str(kwargs.pop('ex_force_api_version',
                                                    None))
        super(OpenStack_1_1_NodeDriver, self).__init__(*args, **kwargs)

    def create_node(self, **kwargs):
        """Create a new node

        @inherits:  :class:`NodeDriver.create_node`

        :keyword    ex_keyname:  The name of the key pair
        :type       ex_keyname:  ``str``

        :keyword    ex_userdata: String containing user data
                                 see
                                 https://help.ubuntu.com/community/CloudInit
        :type       ex_userdata: ``str``

        :keyword    ex_security_groups: List of security groups to assign to
                                        the node
        :type       ex_security_groups: ``list`` of
                                       :class:`OpenStackSecurityGroup`

        :keyword    ex_metadata: Key/Value metadata to associate with a node
        :type       ex_metadata: ``dict``

        :keyword    ex_files:   File Path => File contents to create on
                                the no  de
        :type       ex_files:   ``dict``


        :keyword    networks: The server is launched into a set of Networks.
        :type       networks: ``list`` of :class:`OpenStackNetwork`

        :keyword    ex_disk_config: Name of the disk configuration.
                                    Can be either ``AUTO`` or ``MANUAL``.
        :type       ex_disk_config: ``str``

        :keyword    ex_config_drive: If True enables metadata injection in a
                                     server through a configuration drive.
        :type       ex_config_drive: ``bool``

        :keyword    ex_admin_pass: The root password for the node
        :type       ex_admin_pass: ``str``

        :keyword    ex_availability_zone: Nova availability zone for the node
        :type       ex_availability_zone: ``str``
        """

        server_params = self._create_args_to_params(None, **kwargs)

        resp = self.connection.request("/servers",
                                       method='POST',
                                       data={'server': server_params})

        create_response = resp.object['server']
        server_resp = self.connection.request(
            '/servers/%s' % create_response['id'])
        server_object = server_resp.object['server']

        # adminPass is not always present
        # http://docs.openstack.org/essex/openstack-compute/admin/
        # content/configuring-compute-API.html#d6e1833
        server_object['adminPass'] = create_response.get('adminPass', None)

        return self._to_node(server_object)

    def _to_images(self, obj, ex_only_active):
        images = []
        for image in obj['images']:
            if ex_only_active and image.get('status') != 'ACTIVE':
                continue
            images.append(self._to_image(image))

        return images

    def _to_image(self, api_image):
        server = api_image.get('server', {})
        return NodeImage(
            id=api_image['id'],
            name=api_image['name'],
            driver=self,
            extra=dict(
                updated=api_image['updated'],
                created=api_image['created'],
                status=api_image['status'],
                progress=api_image.get('progress'),
                metadata=api_image.get('metadata'),
                serverId=server.get('id'),
                minDisk=api_image.get('minDisk'),
                minRam=api_image.get('minRam'),
            )
        )

    def _to_nodes(self, obj):
        servers = obj['servers']
        return [self._to_node(server) for server in servers]

    def _to_volumes(self, obj):
        volumes = obj['volumes']
        return [self._to_volume(volume) for volume in volumes]

    def _to_snapshots(self, obj):
        snapshots = obj['snapshots']
        return [self._to_snapshot(snapshot) for snapshot in snapshots]

    def _to_sizes(self, obj):
        flavors = obj['flavors']
        return [self._to_size(flavor) for flavor in flavors]

    def _create_args_to_params(self, node, **kwargs):
        server_params = {
            'name': kwargs.get('name'),
            'metadata': kwargs.get('ex_metadata', {}),
            'personality': self._files_to_personality(kwargs.get("ex_files",
                                                                 {}))
        }

        if 'ex_availability_zone' in kwargs:
            server_params['availability_zone'] = kwargs['ex_availability_zone']

        if 'ex_keyname' in kwargs:
            server_params['key_name'] = kwargs['ex_keyname']

        if 'ex_userdata' in kwargs:
            server_params['user_data'] = base64.b64encode(
                b(kwargs['ex_userdata'])).decode('ascii')

        if 'ex_disk_config' in kwargs:
            server_params['OS-DCF:diskConfig'] = kwargs['ex_disk_config']

        if 'ex_config_drive' in kwargs:
            server_params['config_drive'] = str(kwargs['ex_config_drive'])

        if 'ex_admin_pass' in kwargs:
            server_params['adminPass'] = kwargs['ex_admin_pass']

        if 'networks' in kwargs:
            networks = kwargs['networks']
            networks = [{'uuid': network.id} for network in networks]
            server_params['networks'] = networks

        if 'ex_security_groups' in kwargs:
            server_params['security_groups'] = []
            for security_group in kwargs['ex_security_groups']:
                name = security_group.name
                server_params['security_groups'].append({'name': name})

        if 'name' in kwargs:
            server_params['name'] = kwargs.get('name')
        else:
            server_params['name'] = node.name

        if 'image' in kwargs:
            server_params['imageRef'] = kwargs.get('image').id
        else:
            server_params['imageRef'] = node.extra.get('imageId')

        if 'size' in kwargs:
            server_params['flavorRef'] = kwargs.get('size').id
        else:
            server_params['flavorRef'] = node.extra.get('flavorId')

        return server_params

    def _files_to_personality(self, files):
        rv = []

        for k, v in list(files.items()):
            rv.append({'path': k, 'contents': base64.b64encode(b(v))})

        return rv

    def _reboot_node(self, node, reboot_type='SOFT'):
        resp = self._node_action(node, 'reboot', type=reboot_type)
        return resp.status == httplib.ACCEPTED

    def ex_set_password(self, node, password):
        """
        Changes the administrator password for a specified server.

        :param      node: Node to rebuild.
        :type       node: :class:`Node`

        :param      password: The administrator password.
        :type       password: ``str``

        :rtype: ``bool``
        """
        resp = self._node_action(node, 'changePassword', adminPass=password)
        node.extra['password'] = password
        return resp.status == httplib.ACCEPTED

    def ex_rebuild(self, node, image, **kwargs):
        """
        Rebuild a Node.

        :param      node: Node to rebuild.
        :type       node: :class:`Node`

        :param      image: New image to use.
        :type       image: :class:`NodeImage`

        :keyword    ex_metadata: Key/Value metadata to associate with a node
        :type       ex_metadata: ``dict``

        :keyword    ex_files:   File Path => File contents to create on
                                the no  de
        :type       ex_files:   ``dict``

        :keyword    ex_keyname:  Name of existing public key to inject into
                                 instance
        :type       ex_keyname:  ``str``

        :keyword    ex_userdata: String containing user data
                                 see
                                 https://help.ubuntu.com/community/CloudInit
        :type       ex_userdata: ``str``

        :keyword    ex_security_groups: List of security groups to assign to
                                        the node
        :type       ex_security_groups: ``list`` of
                                       :class:`OpenStackSecurityGroup`

        :keyword    ex_disk_config: Name of the disk configuration.
                                    Can be either ``AUTO`` or ``MANUAL``.
        :type       ex_disk_config: ``str``

        :keyword    ex_config_drive: If True enables metadata injection in a
                                     server through a configuration drive.
        :type       ex_config_drive: ``bool``

        :rtype: ``bool``
        """
        server_params = self._create_args_to_params(node, image=image,
                                                    **kwargs)
        resp = self._node_action(node, 'rebuild', **server_params)
        return resp.status == httplib.ACCEPTED

    def ex_resize(self, node, size):
        """
        Change a node size.

        :param      node: Node to resize.
        :type       node: :class:`Node`

        :type       size: :class:`NodeSize`
        :param      size: New size to use.

        :rtype: ``bool``
        """
        server_params = self._create_args_to_params(node, size=size)
        resp = self._node_action(node, 'resize', **server_params)
        return resp.status == httplib.ACCEPTED

    def ex_confirm_resize(self, node):
        """
        Confirms a pending resize action.

        :param      node: Node to resize.
        :type       node: :class:`Node`

        :rtype: ``bool``
        """
        resp = self._node_action(node, 'confirmResize')
        return resp.status == httplib.NO_CONTENT

    def ex_revert_resize(self, node):
        """
        Cancels and reverts a pending resize action.

        :param      node: Node to resize.
        :type       node: :class:`Node`

        :rtype: ``bool``
        """
        resp = self._node_action(node, 'revertResize')
        return resp.status == httplib.ACCEPTED

    def create_image(self, node, name, metadata=None):
        """
        Creates a new image.

        :param      node: Node
        :type       node: :class:`Node`

        :param      name: The name for the new image.
        :type       name: ``str``

        :param      metadata: Key and value pairs for metadata.
        :type       metadata: ``dict``

        :rtype: :class:`NodeImage`
        """
        optional_params = {}
        if metadata:
            optional_params['metadata'] = metadata
        resp = self._node_action(node, 'createImage', name=name,
                                 **optional_params)
        image_id = self._extract_image_id_from_url(resp.headers['location'])
        return self.get_image(image_id=image_id)

    def ex_set_server_name(self, node, name):
        """
        Sets the Node's name.

        :param      node: Node
        :type       node: :class:`Node`

        :param      name: The name of the server.
        :type       name: ``str``

        :rtype: :class:`Node`
        """
        return self._update_node(node, name=name)

    def ex_get_metadata(self, node):
        """
        Get a Node's metadata.

        :param      node: Node
        :type       node: :class:`Node`

        :return: Key/Value metadata associated with node.
        :rtype: ``dict``
        """
        return self.connection.request(
            '/servers/%s/metadata' % (node.id,),
            method='GET',).object['metadata']

    def ex_set_metadata(self, node, metadata):
        """
        Sets the Node's metadata.

        :param      node: Node
        :type       node: :class:`Node`

        :param      metadata: Key/Value metadata to associate with a node
        :type       metadata: ``dict``

        :rtype: ``dict``
        """
        return self.connection.request(
            '/servers/%s/metadata' % (node.id,), method='PUT',
            data={'metadata': metadata}
        ).object['metadata']

    def ex_update_node(self, node, **node_updates):
        """
        Update the Node's editable attributes.  The OpenStack API currently
        supports editing name and IPv4/IPv6 access addresses.

        The driver currently only supports updating the node name.

        :param      node: Node
        :type       node: :class:`Node`

        :keyword    name:   New name for the server
        :type       name:   ``str``

        :rtype: :class:`Node`
        """
        potential_data = self._create_args_to_params(node, **node_updates)
        updates = {'name': potential_data['name']}
        return self._update_node(node, **updates)

    def _to_networks(self, obj):
        networks = obj['networks']
        return [self._to_network(network) for network in networks]

    def _to_network(self, obj):
        return OpenStackNetwork(id=obj['id'],
                                name=obj['label'],
                                cidr=obj.get('cidr', None),
                                driver=self)

    def ex_list_networks(self):
        """
        Get a list of Networks that are available.

        :rtype: ``list`` of :class:`OpenStackNetwork`
        """
        response = self.connection.request(self._networks_url_prefix).object
        return self._to_networks(response)

    def ex_create_network(self, name, cidr):
        """
        Create a new Network

        :param name: Name of network which should be used
        :type name: ``str``

        :param cidr: cidr of network which should be used
        :type cidr: ``str``

        :rtype: :class:`OpenStackNetwork`
        """
        data = {'network': {'cidr': cidr, 'label': name}}
        response = self.connection.request(self._networks_url_prefix,
                                           method='POST', data=data).object
        return self._to_network(response['network'])

    def ex_delete_network(self, network):
        """
        Get a list of NodeNetorks that are available.

        :param network: Network which should be used
        :type network: :class:`OpenStackNetwork`

        :rtype: ``bool``
        """
        resp = self.connection.request('%s/%s' % (self._networks_url_prefix,
                                                  network.id),
                                       method='DELETE')
        return resp.status == httplib.ACCEPTED

    def ex_get_console_output(self, node, length=None):
        """
        Get console output

        :param      node: node
        :type       node: :class:`Node`

        :param      length: Optional number of lines to fetch from the
                            console log
        :type       length: ``int``

        :return: Dictionary with the output
        :rtype: ``dict``
        """

        data = {
            "os-getConsoleOutput": {
                "length": length
            }
        }

        resp = self.connection.request('/servers/%s/action' % node.id,
                                       method='POST', data=data).object
        return resp

    def ex_list_snapshots(self):
        return self._to_snapshots(
            self.connection.request('/os-snapshots').object)

    def ex_create_snapshot(self, volume, name, description=None, force=False):
        """
        Create a snapshot based off of a volume.

        :param      volume: volume
        :type       volume: :class:`StorageVolume`

        :keyword    name: New name for the volume snapshot
        :type       name: ``str``

        :keyword    description: Description of the snapshot (optional)
        :type       description: ``str``

        :keyword    force: Whether to force creation (optional)
        :type       force: ``bool``

        :rtype:     :class:`VolumeSnapshot`
        """
        data = {'snapshot': {'display_name': name,
                             'display_description': description,
                             'volume_id': volume.id,
                             'force': force}}

        return self._to_snapshot(self.connection.request('/os-snapshots',
                                                         method='POST',
                                                         data=data).object)

    def ex_delete_snapshot(self, snapshot):
        """
        Delete a VolumeSnapshot

        :param      snapshot: snapshot
        :type       snapshot: :class:`VolumeSnapshot`

        :rtype:     ``bool``
        """
        resp = self.connection.request('/os-snapshots/%s' % snapshot.id,
                                       method='DELETE')
        return resp.status == httplib.NO_CONTENT

    def _to_security_group_rules(self, obj):
        return [self._to_security_group_rule(security_group_rule) for
                security_group_rule in obj]

    def _to_security_group_rule(self, obj):
        ip_range = group = tenant_id = None
        if obj['group'] == {}:
            ip_range = obj['ip_range'].get('cidr', None)
        else:
            group = obj['group'].get('name', None)
            tenant_id = obj['group'].get('tenant_id', None)

        return OpenStackSecurityGroupRule(
            id=obj['id'], parent_group_id=obj['parent_group_id'],
            ip_protocol=obj['ip_protocol'], from_port=obj['from_port'],
            to_port=obj['to_port'], driver=self, ip_range=ip_range,
            group=group, tenant_id=tenant_id)

    def _to_security_groups(self, obj):
        security_groups = obj['security_groups']
        return [self._to_security_group(security_group) for security_group in
                security_groups]

    def _to_security_group(self, obj):
        rules = self._to_security_group_rules(obj.get('rules', []))
        return OpenStackSecurityGroup(id=obj['id'],
                                      tenant_id=obj['tenant_id'],
                                      name=obj['name'],
                                      description=obj.get('description', ''),
                                      rules=rules,
                                      driver=self)

    def ex_list_security_groups(self):
        """
        Get a list of Security Groups that are available.

        :rtype: ``list`` of :class:`OpenStackSecurityGroup`
        """
        return self._to_security_groups(
            self.connection.request('/os-security-groups').object)

    def ex_get_node_security_groups(self, node):
        """
        Get Security Groups of the specified server.

        :rtype: ``list`` of :class:`OpenStackSecurityGroup`
        """
        return self._to_security_groups(
            self.connection.request('/servers/%s/os-security-groups' %
                                    (node.id)).object)

    def ex_create_security_group(self, name, description):
        """
        Create a new Security Group

        :param name: Name of the new Security Group
        :type  name: ``str``

        :param description: Description of the new Security Group
        :type  description: ``str``

        :rtype: :class:`OpenStackSecurityGroup`
        """
        return self._to_security_group(self.connection.request(
            '/os-security-groups', method='POST',
            data={'security_group': {'name': name, 'description': description}}
        ).object['security_group'])

    def ex_delete_security_group(self, security_group):
        """
        Delete a Security Group.

        :param security_group: Security Group should be deleted
        :type  security_group: :class:`OpenStackSecurityGroup`

        :rtype: ``bool``
        """
        resp = self.connection.request('/os-security-groups/%s' %
                                       (security_group.id),
                                       method='DELETE')
        return resp.status in (httplib.NO_CONTENT, httplib.ACCEPTED)

    def ex_create_security_group_rule(self, security_group, ip_protocol,
                                      from_port, to_port, cidr=None,
                                      source_security_group=None):
        """
        Create a new Rule in a Security Group

        :param security_group: Security Group in which to add the rule
        :type  security_group: :class:`OpenStackSecurityGroup`

        :param ip_protocol: Protocol to which this rule applies
                            Examples: tcp, udp, ...
        :type  ip_protocol: ``str``

        :param from_port: First port of the port range
        :type  from_port: ``int``

        :param to_port: Last port of the port range
        :type  to_port: ``int``

        :param cidr: CIDR notation of the source IP range for this rule
        :type  cidr: ``str``

        :param source_security_group: Existing Security Group to use as the
                                      source (instead of CIDR)
        :type  source_security_group: L{OpenStackSecurityGroup

        :rtype: :class:`OpenStackSecurityGroupRule`
        """
        source_security_group_id = None
        if type(source_security_group) == OpenStackSecurityGroup:
            source_security_group_id = source_security_group.id

        return self._to_security_group_rule(self.connection.request(
            '/os-security-group-rules', method='POST',
            data={'security_group_rule': {
                'ip_protocol': ip_protocol,
                'from_port': from_port,
                'to_port': to_port,
                'cidr': cidr,
                'group_id': source_security_group_id,
                'parent_group_id': security_group.id}}
        ).object['security_group_rule'])

    def ex_delete_security_group_rule(self, rule):
        """
        Delete a Rule from a Security Group.

        :param rule: Rule should be deleted
        :type  rule: :class:`OpenStackSecurityGroupRule`

        :rtype: ``bool``
        """
        resp = self.connection.request('/os-security-group-rules/%s' %
                                       (rule.id), method='DELETE')
        return resp.status == httplib.NO_CONTENT

    def _to_key_pairs(self, obj):
        key_pairs = obj['keypairs']
        key_pairs = [self._to_key_pair(key_pair['keypair']) for key_pair in
                     key_pairs]
        return key_pairs

    def _to_key_pair(self, obj):
        key_pair = KeyPair(name=obj['name'],
                           fingerprint=obj['fingerprint'],
                           public_key=obj['public_key'],
                           private_key=obj.get('private_key', None),
                           driver=self)
        return key_pair

    def list_key_pairs(self):
        response = self.connection.request('/os-keypairs')
        key_pairs = self._to_key_pairs(response.object)
        return key_pairs

    def get_key_pair(self, name):
        self.connection.set_context({'key_pair_name': name})

        response = self.connection.request('/os-keypairs/%s' % (name))
        key_pair = self._to_key_pair(response.object['keypair'])
        return key_pair

    def create_key_pair(self, name):
        data = {'keypair': {'name': name}}
        response = self.connection.request('/os-keypairs', method='POST',
                                           data=data)
        key_pair = self._to_key_pair(response.object['keypair'])
        return key_pair

    def import_key_pair_from_string(self, name, key_material):
        data = {'keypair': {'name': name, 'public_key': key_material}}
        response = self.connection.request('/os-keypairs', method='POST',
                                           data=data)
        key_pair = self._to_key_pair(response.object['keypair'])
        return key_pair

    def delete_key_pair(self, key_pair):
        """
        Delete a KeyPair.

        :param keypair: KeyPair to delete
        :type  keypair: :class:`OpenStackKeyPair`

        :rtype: ``bool``
        """
        response = self.connection.request('/os-keypairs/%s' % (key_pair.name),
                                           method='DELETE')
        return response.status == httplib.ACCEPTED

    def ex_list_keypairs(self):
        """
        Get a list of KeyPairs that are available.

        :rtype: ``list`` of :class:`OpenStackKeyPair`
        """
        warnings.warn('This method has been deprecated in favor of '
                      'list_key_pairs method')

        return self.list_key_pairs()

    def ex_create_keypair(self, name):
        """
        Create a new KeyPair

        :param name: Name of the new KeyPair
        :type  name: ``str``

        :rtype: :class:`OpenStackKeyPair`
        """
        warnings.warn('This method has been deprecated in favor of '
                      'create_key_pair method')

        return self.create_key_pair(name=name)

    def ex_import_keypair(self, name, keyfile):
        """
        Import a KeyPair from a file

        :param name: Name of the new KeyPair
        :type  name: ``str``

        :param keyfile: Path to the public key file (in OpenSSH format)
        :type  keyfile: ``str``

        :rtype: :class:`OpenStackKeyPair`
        """
        warnings.warn('This method has been deprecated in favor of '
                      'import_key_pair_from_file method')

        return self.import_key_pair_from_file(name=name, key_file_path=keyfile)

    def ex_import_keypair_from_string(self, name, key_material):
        """
        Import a KeyPair from a string

        :param name: Name of the new KeyPair
        :type  name: ``str``

        :param key_material: Public key (in OpenSSH format)
        :type  key_material: ``str``

        :rtype: :class:`OpenStackKeyPair`
        """
        warnings.warn('This method has been deprecated in favor of '
                      'import_key_pair_from_string method')

        return self.import_key_pair_from_string(name=name,
                                                key_material=key_material)

    def ex_delete_keypair(self, keypair):
        """
        Delete a KeyPair.

        :param keypair: KeyPair to delete
        :type  keypair: :class:`OpenStackKeyPair`

        :rtype: ``bool``
        """
        warnings.warn('This method has been deprecated in favor of '
                      'delete_key_pair method')

        return self.delete_key_pair(key_pair=keypair)

    def ex_get_size(self, size_id):
        """
        Get a NodeSize

        :param      size_id: ID of the size which should be used
        :type       size_id: ``str``

        :rtype: :class:`NodeSize`
        """
        return self._to_size(self.connection.request(
            '/flavors/%s' % (size_id,)) .object['flavor'])

    def get_image(self, image_id):
        """
        Get a NodeImage

        @inherits: :class:`NodeDriver.get_image`

        :param      image_id: ID of the image which should be used
        :type       image_id: ``str``

        :rtype: :class:`NodeImage`
        """
        return self._to_image(self.connection.request(
            '/images/%s' % (image_id,)).object['image'])

    def delete_image(self, image):
        """
        Delete a NodeImage

        @inherits: :class:`NodeDriver.delete_image`

        :param      image: image witch should be used
        :type       image: :class:`NodeImage`

        :rtype: ``bool``
        """
        resp = self.connection.request('/images/%s' % (image.id,),
                                       method='DELETE')
        return resp.status == httplib.NO_CONTENT

    def _node_action(self, node, action, **params):
        params = params or None
        return self.connection.request('/servers/%s/action' % (node.id,),
                                       method='POST', data={action: params})

    def _update_node(self, node, **node_updates):
        """
        Updates the editable attributes of a server, which currently include
        its name and IPv4/IPv6 access addresses.
        """
        return self._to_node(
            self.connection.request(
                '/servers/%s' % (node.id,), method='PUT',
                data={'server': node_updates}
            ).object['server']
        )

    def _to_node_from_obj(self, obj):
        return self._to_node(obj['server'])

    def _to_node(self, api_node):
        public_networks_labels = ['public', 'internet']

        public_ips, private_ips = [], []

        for label, values in api_node['addresses'].items():
            for value in values:
                ip = value['addr']

                is_public_ip = False

                try:
                    public_subnet = is_public_subnet(ip)
                except:
                    # IPv6
                    public_subnet = False

                # Openstack Icehouse sets 'OS-EXT-IPS:type' to 'floating' for
                # public and 'fixed' for private
                explicit_ip_type = value.get('OS-EXT-IPS:type', None)

                if explicit_ip_type == 'floating':
                    is_public_ip = True
                elif explicit_ip_type == 'fixed':
                    is_public_ip = False
                elif label in public_networks_labels:
                    # Try label next
                    is_public_ip = True
                elif public_subnet:
                    # Check for public subnet
                    is_public_ip = True

                if is_public_ip:
                    public_ips.append(ip)
                else:
                    private_ips.append(ip)

        # Sometimes 'image' attribute is not present if the node is in an error
        # state
        image = api_node.get('image', None)
        image_id = image.get('id', None) if image else None
        config_drive = api_node.get("config_drive", False)

        return Node(
            id=api_node['id'],
            name=api_node['name'],
            state=self.NODE_STATE_MAP.get(api_node['status'],
                                          NodeState.UNKNOWN),
            public_ips=public_ips,
            private_ips=private_ips,
            driver=self,
            extra=dict(
                hostId=api_node['hostId'],
                access_ip=api_node.get('accessIPv4'),
                # Docs says "tenantId", but actual is "tenant_id". *sigh*
                # Best handle both.
                tenantId=api_node.get('tenant_id') or api_node['tenantId'],
                imageId=image_id,
                flavorId=api_node['flavor']['id'],
                uri=next(link['href'] for link in api_node['links'] if
                         link['rel'] == 'self'),
                metadata=api_node['metadata'],
                password=api_node.get('adminPass', None),
                created=api_node['created'],
                updated=api_node['updated'],
                key_name=api_node.get('key_name', None),
                disk_config=api_node.get('OS-DCF:diskConfig', None),
                config_drive=config_drive,
                availability_zone=api_node.get('OS-EXT-AZ:availability_zone',
                                               None),
            ),
        )

    def _to_volume(self, api_node):
        if 'volume' in api_node:
            api_node = api_node['volume']
        return StorageVolume(
            id=api_node['id'],
            name=api_node['displayName'],
            size=api_node['size'],
            driver=self,
            extra={
                'description': api_node['displayDescription'],
                'attachments': [att for att in api_node['attachments'] if att],
                'state': api_node.get('status', None),
                'location': api_node.get('availabilityZone', None),
                'volume_type': api_node.get('volumeType', None),
                'metadata': api_node.get('metadata', None),
                'created_at': api_node.get('createdAt', None)
            }
        )

    def _to_snapshot(self, data):
        if 'snapshot' in data:
            data = data['snapshot']

        volume_id = data.get('volume_id', data.get('volumeId', None))
        display_name = data.get('display_name', data.get('displayName', None))
        created_at = data.get('created_at', data.get('createdAt', None))
        description = data.get('display_description',
                               data.get('displayDescription', None))
        status = data.get('status', None)

        extra = {'volume_id': volume_id,
                 'name': display_name,
                 'created': created_at,
                 'description': description,
                 'status': status}

        snapshot = VolumeSnapshot(id=data['id'], driver=self,
                                  size=data['size'], extra=extra)
        return snapshot

    def _to_size(self, api_flavor, price=None, bandwidth=None):
        # if provider-specific subclasses can get better values for
        # price/bandwidth, then can pass them in when they super().
        if not price:
            price = self._get_size_price(str(api_flavor['id']))

        return OpenStackNodeSize(
            id=api_flavor['id'],
            name=api_flavor['name'],
            ram=api_flavor['ram'],
            disk=api_flavor['disk'],
            vcpus=api_flavor['vcpus'],
            bandwidth=bandwidth,
            price=price,
            driver=self,
        )

    def _get_size_price(self, size_id):
        try:
            return get_size_price(
                driver_type='compute',
                driver_name=self.api_name,
                size_id=size_id,
            )
        except KeyError:
            return(0.0)

    def _extract_image_id_from_url(self, location_header):
        path = urlparse.urlparse(location_header).path
        image_id = path.split('/')[-1]
        return image_id

    def ex_rescue(self, node, password=None):
        # Requires Rescue Mode extension
        """
        Rescue a node

        :param      node: node
        :type       node: :class:`Node`

        :param      password: password
        :type       password: ``str``

        :rtype: :class:`Node`
        """
        if password:
            resp = self._node_action(node, 'rescue', adminPass=password)
        else:
            resp = self._node_action(node, 'rescue')
            password = json.loads(resp.body)['adminPass']
        node.extra['password'] = password
        return node

    def ex_unrescue(self, node):
        """
        Unrescue a node

        :param      node: node
        :type       node: :class:`Node`

        :rtype: ``bool``
        """
        resp = self._node_action(node, 'unrescue')
        return resp.status == httplib.ACCEPTED

    def _to_floating_ip_pools(self, obj):
        pool_elements = obj['floating_ip_pools']
        return [self._to_floating_ip_pool(pool) for pool in pool_elements]

    def _to_floating_ip_pool(self, obj):
        return OpenStack_1_1_FloatingIpPool(obj['name'], self.connection)

    def ex_list_floating_ip_pools(self):
        """
        List available floating IP pools

        :rtype: ``list`` of :class:`OpenStack_1_1_FloatingIpPool`
        """
        return self._to_floating_ip_pools(
            self.connection.request('/os-floating-ip-pools').object)

    def _to_floating_ips(self, obj):
        ip_elements = obj['floating_ips']
        return [self._to_floating_ip(ip) for ip in ip_elements]

    def _to_floating_ip(self, obj):
        return OpenStack_1_1_FloatingIpAddress(id=obj['id'],
                                               ip_address=obj['ip'],
                                               pool=None,
                                               node_id=obj['instance_id'],
                                               driver=self)

    def ex_list_floating_ips(self):
        """
        List floating IPs

        :rtype: ``list`` of :class:`OpenStack_1_1_FloatingIpAddress`
        """
        return self._to_floating_ips(
            self.connection.request('/os-floating-ips').object)

    def ex_get_floating_ip(self, ip):
        """
        Get specified floating IP

        :param      ip: floating IP to get
        :type       ip: ``str``

        :rtype: :class:`OpenStack_1_1_FloatingIpAddress`
        """
        floating_ips = self.ex_list_floating_ips()
        ip_obj, = [x for x in floating_ips if x.ip_address == ip]
        return ip_obj

    def ex_create_floating_ip(self):
        """
        Create new floating IP

        :rtype: :class:`OpenStack_1_1_FloatingIpAddress`
        """
        resp = self.connection.request('/os-floating-ips',
                                       method='POST',
                                       data={})
        data = resp.object['floating_ip']
        id = data['id']
        ip_address = data['ip']
        return OpenStack_1_1_FloatingIpAddress(id=id,
                                               ip_address=ip_address,
                                               pool=None,
                                               node_id=None,
                                               driver=self)

    def ex_delete_floating_ip(self, ip):
        """
        Delete specified floating IP

        :param      ip: floating IP to remove
        :type       ip: :class:`OpenStack_1_1_FloatingIpAddress`

        :rtype: ``bool``
        """
        resp = self.connection.request('/os-floating-ips/%s' % ip.id,
                                       method='DELETE')
        return resp.status in (httplib.NO_CONTENT, httplib.ACCEPTED)

    def ex_attach_floating_ip_to_node(self, node, ip):
        """
        Attach the floating IP to the node

        :param      node: node
        :type       node: :class:`Node`

        :param      ip: floating IP to attach
        :type       ip: ``str`` or :class:`OpenStack_1_1_FloatingIpAddress`

        :rtype: ``bool``
        """
        address = ip.ip_address if hasattr(ip, 'ip_address') else ip
        data = {
            'addFloatingIp': {'address': address}
        }
        resp = self.connection.request('/servers/%s/action' % node.id,
                                       method='POST', data=data)
        return resp.status == httplib.ACCEPTED

    def ex_detach_floating_ip_from_node(self, node, ip):
        """
        Detach the floating IP from the node

        :param      node: node
        :type       node: :class:`Node`

        :param      ip: floating IP to remove
        :type       ip: ``str`` or :class:`OpenStack_1_1_FloatingIpAddress`

        :rtype: ``bool``
        """
        address = ip.ip_address if hasattr(ip, 'ip_address') else ip
        data = {
            'removeFloatingIp': {'address': address}
        }
        resp = self.connection.request('/servers/%s/action' % node.id,
                                       method='POST', data=data)
        return resp.status == httplib.ACCEPTED

    def ex_get_metadata_for_node(self, node):
        """
        Return the metadata associated with the node.

        :param      node: Node instance
        :type       node: :class:`Node`

        :return: A dictionary or other mapping of strings to strings,
                 associating tag names with tag values.
        :type tags: ``dict``
        """
        return node.extra['metadata']

    def ex_pause_node(self, node):
        uri = '/servers/%s/action' % (node.id)
        data = {'pause': None}
        resp = self.connection.request(uri, method='POST', data=data)
        return resp.status == httplib.ACCEPTED

    def ex_unpause_node(self, node):
        uri = '/servers/%s/action' % (node.id)
        data = {'unpause': None}
        resp = self.connection.request(uri, method='POST', data=data)
        return resp.status == httplib.ACCEPTED

    def ex_suspend_node(self, node):
        uri = '/servers/%s/action' % (node.id)
        data = {'suspend': None}
        resp = self.connection.request(uri, method='POST', data=data)
        return resp.status == httplib.ACCEPTED

    def ex_resume_node(self, node):
        uri = '/servers/%s/action' % (node.id)
        data = {'resume': None}
        resp = self.connection.request(uri, method='POST', data=data)
        return resp.status == httplib.ACCEPTED


class OpenStack_1_1_FloatingIpPool(object):
    """
    Floating IP Pool info.
    """

    def __init__(self, name, connection):
        self.name = name
        self.connection = connection

    def list_floating_ips(self):
        """
        List floating IPs in the pool

        :rtype: ``list`` of :class:`OpenStack_1_1_FloatingIpAddress`
        """
        return self._to_floating_ips(
            self.connection.request('/os-floating-ips').object)

    def _to_floating_ips(self, obj):
        ip_elements = obj['floating_ips']
        return [self._to_floating_ip(ip) for ip in ip_elements]

    def _to_floating_ip(self, obj):
        return OpenStack_1_1_FloatingIpAddress(id=obj['id'],
                                               ip_address=obj['ip'],
                                               pool=self,
                                               node_id=obj['instance_id'],
                                               driver=self.connection.driver)

    def get_floating_ip(self, ip):
        """
        Get specified floating IP from the pool

        :param      ip: floating IP to get
        :type       ip: ``str``

        :rtype: :class:`OpenStack_1_1_FloatingIpAddress`
        """
        ip_obj, = [x for x in self.list_floating_ips() if x.ip_address == ip]
        return ip_obj

    def create_floating_ip(self):
        """
        Create new floating IP in the pool

        :rtype: :class:`OpenStack_1_1_FloatingIpAddress`
        """
        resp = self.connection.request('/os-floating-ips',
                                       method='POST',
                                       data={'pool': self.name})
        data = resp.object['floating_ip']
        id = data['id']
        ip_address = data['ip']
        return OpenStack_1_1_FloatingIpAddress(id=id,
                                               ip_address=ip_address,
                                               pool=self,
                                               node_id=None,
                                               driver=self.connection.driver)

    def delete_floating_ip(self, ip):
        """
        Delete specified floating IP from the pool

        :param      ip: floating IP to remove
        :type       ip::class:`OpenStack_1_1_FloatingIpAddress`

        :rtype: ``bool``
        """
        resp = self.connection.request('/os-floating-ips/%s' % ip.id,
                                       method='DELETE')
        return resp.status in (httplib.NO_CONTENT, httplib.ACCEPTED)

    def __repr__(self):
        return ('<OpenStack_1_1_FloatingIpPool: name=%s>' % self.name)


class OpenStack_1_1_FloatingIpAddress(object):
    """
    Floating IP info.
    """

    def __init__(self, id, ip_address, pool, node_id=None, driver=None):
        self.id = str(id)
        self.ip_address = ip_address
        self.pool = pool
        self.node_id = node_id
        self.driver = driver

    def delete(self):
        """
        Delete this floating IP

        :rtype: ``bool``
        """
        if self.pool is not None:
            return self.pool.delete_floating_ip(self)
        elif self.driver is not None:
            return self.driver.ex_delete_floating_ip(self)

    def __repr__(self):
        return ('<OpenStack_1_1_FloatingIpAddress: id=%s, ip_addr=%s,'
                ' pool=%s, driver=%s>'
                % (self.id, self.ip_address, self.pool, self.driver))
