Mini Shell
# Copyright 2002-2009, Distributed Systems Architecture Group, Universidad
# Complutense de Madrid (dsa-research.org)
#
# 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.
"""
OpenNebula.org driver.
"""
__docformat__ = 'epytext'
from base64 import b64encode
import hashlib
from libcloud.utils.py3 import ET
from libcloud.utils.py3 import httplib
from libcloud.utils.py3 import next
from libcloud.utils.py3 import b
from libcloud.compute.base import NodeState, NodeDriver, Node, NodeLocation
from libcloud.common.base import ConnectionUserAndKey, XmlResponse
from libcloud.compute.base import NodeImage, NodeSize, StorageVolume
from libcloud.common.types import InvalidCredsError
from libcloud.compute.providers import Provider
__all__ = [
'ACTION',
'OpenNebulaResponse',
'OpenNebulaConnection',
'OpenNebulaNodeSize',
'OpenNebulaNetwork',
'OpenNebulaNodeDriver',
'OpenNebula_1_4_NodeDriver',
'OpenNebula_2_0_NodeDriver',
'OpenNebula_3_0_NodeDriver',
'OpenNebula_3_2_NodeDriver',
'OpenNebula_3_8_NodeDriver']
API_HOST = ''
API_PORT = (4567, 443)
API_SECURE = True
API_PLAIN_AUTH = False
DEFAULT_API_VERSION = '3.2'
class ACTION(object):
"""
All actions, except RESUME, only apply when the VM is in the "Running"
state.
"""
STOP = 'STOPPED'
"""
The VM is stopped, and its memory state stored to a checkpoint file. VM
state, and disk image, are transferred back to the front-end. Resuming
the VM requires the VM instance to be re-scheduled.
"""
SUSPEND = 'SUSPENDED'
"""
The VM is stopped, and its memory state stored to a checkpoint file. The VM
state, and disk image, are left on the host to be resumed later. Resuming
the VM does not require the VM to be re-scheduled. Rather, after
suspending, the VM resources are reserved for later resuming.
"""
RESUME = 'RESUME'
"""
The VM is resumed using the saved memory state from the checkpoint file,
and the VM's disk image. The VM is either started immediately, or
re-scheduled depending on how it was suspended.
"""
CANCEL = 'CANCEL'
"""
The VM is forcibly shutdown, its memory state is deleted. If a persistent
disk image was used, that disk image is transferred back to the front-end.
Any non-persistent disk images are deleted.
"""
SHUTDOWN = 'SHUTDOWN'
"""
The VM is gracefully shutdown by sending the ACPI signal. If the VM does
not shutdown, then it is considered to still be running. If successfully,
shutdown, its memory state is deleted. If a persistent disk image was used,
that disk image is transferred back to the front-end. Any non-persistent
disk images are deleted.
"""
REBOOT = 'REBOOT'
"""
Introduced in OpenNebula v3.2.
The VM is gracefully restarted by sending the ACPI signal.
"""
DONE = 'DONE'
"""
The VM is forcibly shutdown, its memory state is deleted. If a persistent
disk image was used, that disk image is transferred back to the front-end.
Any non-persistent disk images are deleted.
"""
class OpenNebulaResponse(XmlResponse):
"""
XmlResponse class for the OpenNebula.org driver.
"""
def success(self):
"""
Check if response has the appropriate HTTP response code to be a
success.
:rtype: ``bool``
:return: True is success, else False.
"""
i = int(self.status)
return 200 <= i <= 299
def parse_error(self):
"""
Check if response contains any errors.
@raise: :class:`InvalidCredsError`
:rtype: :class:`ElementTree`
:return: Contents of HTTP response body.
"""
if int(self.status) == httplib.UNAUTHORIZED:
raise InvalidCredsError(self.body)
return self.body
class OpenNebulaConnection(ConnectionUserAndKey):
"""
Connection class for the OpenNebula.org driver.
with plain_auth support
"""
host = API_HOST
port = API_PORT
secure = API_SECURE
plain_auth = API_PLAIN_AUTH
responseCls = OpenNebulaResponse
def __init__(self, *args, **kwargs):
if 'plain_auth' in kwargs:
self.plain_auth = kwargs.pop('plain_auth')
super(OpenNebulaConnection, self).__init__(*args, **kwargs)
def add_default_headers(self, headers):
"""
Add headers required by the OpenNebula.org OCCI interface.
Includes adding Basic HTTP Authorization headers for authenticating
against the OpenNebula.org OCCI interface.
:type headers: ``dict``
:param headers: Dictionary containing HTTP headers.
:rtype: ``dict``
:return: Dictionary containing updated headers.
"""
if self.plain_auth:
passwd = self.key
else:
passwd = hashlib.sha1(b(self.key)).hexdigest()
headers['Authorization'] =\
('Basic %s' % b64encode(b('%s:%s' % (self.user_id,
passwd))).decode('utf-8'))
return headers
class OpenNebulaNodeSize(NodeSize):
"""
NodeSize class for the OpenNebula.org driver.
"""
def __init__(self, id, name, ram, disk, bandwidth, price, driver,
cpu=None, vcpu=None):
super(OpenNebulaNodeSize, self).__init__(id=id, name=name, ram=ram,
disk=disk,
bandwidth=bandwidth,
price=price, driver=driver)
self.cpu = cpu
self.vcpu = vcpu
def __repr__(self):
return (('<OpenNebulaNodeSize: id=%s, name=%s, ram=%s, disk=%s, '
'bandwidth=%s, price=%s, driver=%s, cpu=%s, vcpu=%s ...>')
% (self.id, self.name, self.ram, self.disk, self.bandwidth,
self.price, self.driver.name, self.cpu, self.vcpu))
class OpenNebulaNetwork(object):
"""
Provide a common interface for handling networks of all types.
Network objects are analogous to physical switches connecting two or
more physical nodes together. The Network object provides the interface in
libcloud through which we can manipulate networks in different cloud
providers in the same way. Network objects don't actually do much directly
themselves, instead the network driver handles the connection to the
network.
You don't normally create a network object yourself; instead you use
a driver and then have that create the network for you.
>>> from libcloud.compute.drivers.dummy import DummyNodeDriver
>>> driver = DummyNodeDriver()
>>> network = driver.create_network()
>>> network = driver.list_networks()[0]
>>> network.name
'dummy-1'
"""
def __init__(self, id, name, address, size, driver, extra=None):
self.id = str(id)
self.name = name
self.address = address
self.size = size
self.driver = driver
self.uuid = self.get_uuid()
self.extra = extra or {}
def get_uuid(self):
"""
Unique hash for this network.
The hash is a function of an SHA1 hash of the network's ID and
its driver which means that it should be unique between all
networks. In some subclasses (e.g. GoGrid) there is no ID
available so the public IP address is used. This means that,
unlike a properly done system UUID, the same UUID may mean a
different system install at a different time
>>> from libcloud.network.drivers.dummy import DummyNetworkDriver
>>> driver = DummyNetworkDriver()
>>> network = driver.create_network()
>>> network.get_uuid()
'd3748461511d8b9b0e0bfa0d4d3383a619a2bb9f'
Note, for example, that this example will always produce the
same UUID!
:rtype: ``str``
:return: Unique identifier for this instance.
"""
return hashlib.sha1(b("%s:%s" % (self.id,
self.driver.type))).hexdigest()
def __repr__(self):
return (('<OpenNebulaNetwork: uuid=%s, name=%s, address=%s, size=%s, '
'provider=%s ...>')
% (self.uuid, self.name, self.address, self.size,
self.driver.name))
class OpenNebulaNodeDriver(NodeDriver):
"""
OpenNebula.org node driver.
"""
connectionCls = OpenNebulaConnection
name = 'OpenNebula'
website = 'http://opennebula.org/'
type = Provider.OPENNEBULA
NODE_STATE_MAP = {
'INIT': NodeState.PENDING,
'PENDING': NodeState.PENDING,
'HOLD': NodeState.PENDING,
'ACTIVE': NodeState.RUNNING,
'STOPPED': NodeState.TERMINATED,
'SUSPENDED': NodeState.PENDING,
'DONE': NodeState.TERMINATED,
'FAILED': NodeState.TERMINATED}
def __new__(cls, key, secret=None, api_version=DEFAULT_API_VERSION,
**kwargs):
if cls is OpenNebulaNodeDriver:
if api_version in ['1.4']:
cls = OpenNebula_1_4_NodeDriver
elif api_version in ['2.0', '2.2']:
cls = OpenNebula_2_0_NodeDriver
elif api_version in ['3.0']:
cls = OpenNebula_3_0_NodeDriver
elif api_version in ['3.2']:
cls = OpenNebula_3_2_NodeDriver
elif api_version in ['3.6']:
cls = OpenNebula_3_6_NodeDriver
elif api_version in ['3.8']:
cls = OpenNebula_3_8_NodeDriver
if 'plain_auth' not in kwargs:
kwargs['plain_auth'] = cls.plain_auth
else:
cls.plain_auth = kwargs['plain_auth']
else:
raise NotImplementedError(
"No OpenNebulaNodeDriver found for API version %s" %
(api_version))
return super(OpenNebulaNodeDriver, cls).__new__(cls)
def create_node(self, name, size, image, networks=None):
"""
Create a new OpenNebula node.
@inherits: :class:`NodeDriver.create_node`
:keyword networks: List of virtual networks to which this node should
connect. (optional)
:type networks: :class:`OpenNebulaNetwork` or
``list`` of :class:`OpenNebulaNetwork`
"""
compute = ET.Element('COMPUTE')
name = ET.SubElement(compute, 'NAME')
name.text = name
instance_type = ET.SubElement(compute, 'INSTANCE_TYPE')
instance_type.text = size.name
storage = ET.SubElement(compute, 'STORAGE')
ET.SubElement(storage,
'DISK',
{'image': '%s' % (str(image.id))})
if networks:
if not isinstance(networks, list):
networks = [networks]
networkGroup = ET.SubElement(compute, 'NETWORK')
for network in networks:
if network.address:
ET.SubElement(networkGroup, 'NIC',
{'network': '%s' % (str(network.id)),
'ip': network.address})
else:
ET.SubElement(networkGroup, 'NIC',
{'network': '%s' % (str(network.id))})
xml = ET.tostring(compute)
node = self.connection.request('/compute', method='POST',
data=xml).object
return self._to_node(node)
def destroy_node(self, node):
url = '/compute/%s' % (str(node.id))
resp = self.connection.request(url, method='DELETE')
return resp.status == httplib.OK
def list_nodes(self):
return self._to_nodes(self.connection.request('/compute').object)
def list_images(self, location=None):
return self._to_images(self.connection.request('/storage').object)
def list_sizes(self, location=None):
"""
Return list of sizes on a provider.
@inherits: :class:`NodeDriver.list_sizes`
:return: List of compute node sizes supported by the cloud provider.
:rtype: ``list`` of :class:`OpenNebulaNodeSize`
"""
return [
NodeSize(id=1,
name='small',
ram=None,
disk=None,
bandwidth=None,
price=None,
driver=self),
NodeSize(id=2,
name='medium',
ram=None,
disk=None,
bandwidth=None,
price=None,
driver=self),
NodeSize(id=3,
name='large',
ram=None,
disk=None,
bandwidth=None,
price=None,
driver=self),
]
def list_locations(self):
return [NodeLocation(0, '', '', self)]
def ex_list_networks(self, location=None):
"""
List virtual networks on a provider.
:param location: Location from which to request a list of virtual
networks. (optional)
:type location: :class:`NodeLocation`
:return: List of virtual networks available to be connected to a
compute node.
:rtype: ``list`` of :class:`OpenNebulaNetwork`
"""
return self._to_networks(self.connection.request('/network').object)
def ex_node_action(self, node, action):
"""
Build action representation and instruct node to commit action.
Build action representation from the compute node ID, and the
action which should be carried out on that compute node. Then
instruct the node to carry out that action.
:param node: Compute node instance.
:type node: :class:`Node`
:param action: Action to be carried out on the compute node.
:type action: ``str``
:return: False if an HTTP Bad Request is received, else, True is
returned.
:rtype: ``bool``
"""
compute_node_id = str(node.id)
compute = ET.Element('COMPUTE')
compute_id = ET.SubElement(compute, 'ID')
compute_id.text = compute_node_id
state = ET.SubElement(compute, 'STATE')
state.text = action
xml = ET.tostring(compute)
url = '/compute/%s' % compute_node_id
resp = self.connection.request(url, method='PUT',
data=xml)
if resp.status == httplib.BAD_REQUEST:
return False
else:
return True
def _to_images(self, object):
"""
Request a list of images and convert that list to a list of NodeImage
objects.
Request a list of images from the OpenNebula web interface, and
issue a request to convert each XML object representation of an image
to a NodeImage object.
:rtype: ``list`` of :class:`NodeImage`
:return: List of images.
"""
images = []
for element in object.findall('DISK'):
image_id = element.attrib['href'].partition('/storage/')[2]
image = self.connection.request(
('/storage/%s' % (image_id))).object
images.append(self._to_image(image))
return images
def _to_image(self, image):
"""
Take XML object containing an image description and convert to
NodeImage object.
:type image: :class:`ElementTree`
:param image: XML representation of an image.
:rtype: :class:`NodeImage`
:return: The newly extracted :class:`NodeImage`.
"""
return NodeImage(id=image.findtext('ID'),
name=image.findtext('NAME'),
driver=self.connection.driver,
extra={'size': image.findtext('SIZE'),
'url': image.findtext('URL')})
def _to_networks(self, object):
"""
Request a list of networks and convert that list to a list of
OpenNebulaNetwork objects.
Request a list of networks from the OpenNebula web interface, and
issue a request to convert each XML object representation of a network
to an OpenNebulaNetwork object.
:rtype: ``list`` of :class:`OpenNebulaNetwork`
:return: List of virtual networks.
"""
networks = []
for element in object.findall('NETWORK'):
network_id = element.attrib['href'].partition('/network/')[2]
network_element = self.connection.request(
('/network/%s' % (network_id))).object
networks.append(self._to_network(network_element))
return networks
def _to_network(self, element):
"""
Take XML object containing a network description and convert to
OpenNebulaNetwork object.
Take XML representation containing a network description and
convert to OpenNebulaNetwork object.
:rtype: :class:`OpenNebulaNetwork`
:return: The newly extracted :class:`OpenNebulaNetwork`.
"""
return OpenNebulaNetwork(id=element.findtext('ID'),
name=element.findtext('NAME'),
address=element.findtext('ADDRESS'),
size=element.findtext('SIZE'),
driver=self.connection.driver)
def _to_nodes(self, object):
"""
Request a list of compute nodes and convert that list to a list of
Node objects.
Request a list of compute nodes from the OpenNebula web interface, and
issue a request to convert each XML object representation of a node
to a Node object.
:rtype: ``list`` of :class:`Node`
:return: A list of compute nodes.
"""
computes = []
for element in object.findall('COMPUTE'):
compute_id = element.attrib['href'].partition('/compute/')[2]
compute = self.connection.request(
('/compute/%s' % (compute_id))).object
computes.append(self._to_node(compute))
return computes
def _to_node(self, compute):
"""
Take XML object containing a compute node description and convert to
Node object.
Take XML representation containing a compute node description and
convert to Node object.
:type compute: :class:`ElementTree`
:param compute: XML representation of a compute node.
:rtype: :class:`Node`
:return: The newly extracted :class:`Node`.
"""
try:
state = self.NODE_STATE_MAP[compute.findtext('STATE').upper()]
except KeyError:
state = NodeState.UNKNOWN
return Node(id=compute.findtext('ID'),
name=compute.findtext('NAME'),
state=state,
public_ips=self._extract_networks(compute),
private_ips=[],
driver=self.connection.driver,
image=self._extract_images(compute))
def _extract_networks(self, compute):
"""
Extract networks from a compute node XML representation.
Extract network descriptions from a compute node XML representation,
converting each network to an OpenNebulaNetwork object.
:type compute: :class:`ElementTree`
:param compute: XML representation of a compute node.
:rtype: ``list`` of :class:`OpenNebulaNetwork`s.
:return: List of virtual networks attached to the compute node.
"""
networks = list()
network_list = compute.find('NETWORK')
for element in network_list.findall('NIC'):
networks.append(
OpenNebulaNetwork(id=element.attrib.get('network', None),
name=None,
address=element.attrib.get('ip', None),
size=1,
driver=self.connection.driver))
return networks
def _extract_images(self, compute):
"""
Extract image disks from a compute node XML representation.
Extract image disk descriptions from a compute node XML representation,
converting the disks to an NodeImage object.
:type compute: :class:`ElementTree`
:param compute: XML representation of a compute node.
:rtype: :class:`NodeImage`.
:return: First disk attached to a compute node.
"""
disks = list()
disk_list = compute.find('STORAGE')
if disk_list is not None:
for element in disk_list.findall('DISK'):
disks.append(
NodeImage(id=element.attrib.get('image', None),
name=None,
driver=self.connection.driver,
extra={'dev': element.attrib.get('dev', None)}))
# @TODO: Return all disks when the Node type accepts multiple
# attached disks per node.
if len(disks) > 0:
return disks[0]
else:
return None
class OpenNebula_1_4_NodeDriver(OpenNebulaNodeDriver):
"""
OpenNebula.org node driver for OpenNebula.org v1.4.
"""
name = 'OpenNebula (v1.4)'
class OpenNebula_2_0_NodeDriver(OpenNebulaNodeDriver):
"""
OpenNebula.org node driver for OpenNebula.org v2.0 through OpenNebula.org
v2.2.
"""
name = 'OpenNebula (v2.0 - v2.2)'
def create_node(self, name, size, image, networks=None, context=None):
"""
Create a new OpenNebula node.
@inherits: :class:`NodeDriver.create_node`
:keyword networks: List of virtual networks to which this node should
connect. (optional)
:type networks: :class:`OpenNebulaNetwork` or ``list``
of :class:`OpenNebulaNetwork`
:keyword context: Custom (key, value) pairs to be injected into
compute node XML description. (optional)
:type context: ``dict``
:return: Instance of a newly created node.
:rtype: :class:`Node`
"""
compute = ET.Element('COMPUTE')
name = ET.SubElement(compute, 'NAME')
name.text = name
instance_type = ET.SubElement(compute, 'INSTANCE_TYPE')
instance_type.text = size.name
disk = ET.SubElement(compute, 'DISK')
ET.SubElement(disk,
'STORAGE',
{'href': '/storage/%s' % (str(image.id))})
if networks:
if not isinstance(networks, list):
networks = [networks]
for network in networks:
nic = ET.SubElement(compute, 'NIC')
ET.SubElement(nic, 'NETWORK',
{'href': '/network/%s' % (str(network.id))})
if network.address:
ip_line = ET.SubElement(nic, 'IP')
ip_line.text = network.address
if context and isinstance(context, dict):
contextGroup = ET.SubElement(compute, 'CONTEXT')
for key, value in list(context.items()):
context = ET.SubElement(contextGroup, key.upper())
context.text = value
xml = ET.tostring(compute)
node = self.connection.request('/compute', method='POST',
data=xml).object
return self._to_node(node)
def destroy_node(self, node):
url = '/compute/%s' % (str(node.id))
resp = self.connection.request(url, method='DELETE')
return resp.status == httplib.NO_CONTENT
def list_sizes(self, location=None):
"""
Return list of sizes on a provider.
@inherits: :class:`NodeDriver.list_sizes`
:return: List of compute node sizes supported by the cloud provider.
:rtype: ``list`` of :class:`OpenNebulaNodeSize`
"""
return [
OpenNebulaNodeSize(id=1,
name='small',
ram=1024,
cpu=1,
disk=None,
bandwidth=None,
price=None,
driver=self),
OpenNebulaNodeSize(id=2,
name='medium',
ram=4096,
cpu=4,
disk=None,
bandwidth=None,
price=None,
driver=self),
OpenNebulaNodeSize(id=3,
name='large',
ram=8192,
cpu=8,
disk=None,
bandwidth=None,
price=None,
driver=self),
OpenNebulaNodeSize(id=4,
name='custom',
ram=0,
cpu=0,
disk=None,
bandwidth=None,
price=None,
driver=self),
]
def _to_images(self, object):
"""
Request a list of images and convert that list to a list of NodeImage
objects.
Request a list of images from the OpenNebula web interface, and
issue a request to convert each XML object representation of an image
to a NodeImage object.
:rtype: ``list`` of :class:`NodeImage`
:return: List of images.
"""
images = []
for element in object.findall('STORAGE'):
image_id = element.attrib["href"].partition("/storage/")[2]
image = self.connection.request(
("/storage/%s" % (image_id))).object
images.append(self._to_image(image))
return images
def _to_image(self, image):
"""
Take XML object containing an image description and convert to
NodeImage object.
:type image: :class:`ElementTree`
:param image: XML representation of an image.
:rtype: :class:`NodeImage`
:return: The newly extracted :class:`NodeImage`.
"""
return NodeImage(id=image.findtext('ID'),
name=image.findtext('NAME'),
driver=self.connection.driver,
extra={'description': image.findtext('DESCRIPTION'),
'type': image.findtext('TYPE'),
'size': image.findtext('SIZE'),
'fstype': image.findtext('FSTYPE', None)})
def _to_node(self, compute):
"""
Take XML object containing a compute node description and convert to
Node object.
Take XML representation containing a compute node description and
convert to Node object.
:type compute: :class:`ElementTree`
:param compute: XML representation of a compute node.
:rtype: :class:`Node`
:return: The newly extracted :class:`Node`.
"""
try:
state = self.NODE_STATE_MAP[compute.findtext('STATE').upper()]
except KeyError:
state = NodeState.UNKNOWN
return Node(id=compute.findtext('ID'),
name=compute.findtext('NAME'),
state=state,
public_ips=self._extract_networks(compute),
private_ips=[],
driver=self.connection.driver,
image=self._extract_images(compute),
size=self._extract_size(compute),
extra={'context': self._extract_context(compute)})
def _extract_networks(self, compute):
"""
Extract networks from a compute node XML representation.
Extract network descriptions from a compute node XML representation,
converting each network to an OpenNebulaNetwork object.
:type compute: :class:`ElementTree`
:param compute: XML representation of a compute node.
:rtype: ``list`` of :class:`OpenNebulaNetwork`
:return: List of virtual networks attached to the compute node.
"""
networks = []
for element in compute.findall('NIC'):
network = element.find('NETWORK')
network_id = network.attrib['href'].partition('/network/')[2]
networks.append(
OpenNebulaNetwork(id=network_id,
name=network.attrib.get('name', None),
address=element.findtext('IP'),
size=1,
driver=self.connection.driver,
extra={'mac': element.findtext('MAC')}))
return networks
def _extract_images(self, compute):
"""
Extract image disks from a compute node XML representation.
Extract image disk descriptions from a compute node XML representation,
converting the disks to an NodeImage object.
:type compute: :class:`ElementTree`
:param compute: XML representation of a compute node.
:rtype: ``list`` of :class:`NodeImage`
:return: Disks attached to a compute node.
"""
disks = list()
for element in compute.findall('DISK'):
disk = element.find('STORAGE')
image_id = disk.attrib['href'].partition('/storage/')[2]
if 'id' in element.attrib:
disk_id = element.attrib['id']
else:
disk_id = None
disks.append(
NodeImage(id=image_id,
name=disk.attrib.get('name', None),
driver=self.connection.driver,
extra={'type': element.findtext('TYPE'),
'disk_id': disk_id,
'target': element.findtext('TARGET')}))
# Return all disks when the Node type accepts multiple attached disks
# per node.
if len(disks) > 1:
return disks
elif len(disks) == 1:
return disks[0]
else:
return None
def _extract_size(self, compute):
"""
Extract size, or node type, from a compute node XML representation.
Extract node size, or node type, description from a compute node XML
representation, converting the node size to a NodeSize object.
:type compute: :class:`ElementTree`
:param compute: XML representation of a compute node.
:rtype: :class:`OpenNebulaNodeSize`
:return: Node type of compute node.
"""
instance_type = compute.find('INSTANCE_TYPE')
try:
return next((node_size for node_size in self.list_sizes()
if node_size.name == instance_type.text))
except StopIteration:
return None
def _extract_context(self, compute):
"""
Extract size, or node type, from a compute node XML representation.
Extract node size, or node type, description from a compute node XML
representation, converting the node size to a NodeSize object.
:type compute: :class:`ElementTree`
:param compute: XML representation of a compute node.
:rtype: ``dict``
:return: Dictionary containing (key, value) pairs related to
compute node context.
"""
contexts = dict()
context = compute.find('CONTEXT')
if context is not None:
for context_element in list(context):
contexts[context_element.tag.lower()] = context_element.text
return contexts
class OpenNebula_3_0_NodeDriver(OpenNebula_2_0_NodeDriver):
"""
OpenNebula.org node driver for OpenNebula.org v3.0.
"""
name = 'OpenNebula (v3.0)'
def ex_node_set_save_name(self, node, name):
"""
Build action representation and instruct node to commit action.
Build action representation from the compute node ID, the disk image
which will be saved, and the name under which the image will be saved
upon shutting down the compute node.
:param node: Compute node instance.
:type node: :class:`Node`
:param name: Name under which the image should be saved after shutting
down the compute node.
:type name: ``str``
:return: False if an HTTP Bad Request is received, else, True is
returned.
:rtype: ``bool``
"""
compute_node_id = str(node.id)
compute = ET.Element('COMPUTE')
compute_id = ET.SubElement(compute, 'ID')
compute_id.text = compute_node_id
disk = ET.SubElement(compute, 'DISK', {'id': str(node.image.id)})
ET.SubElement(disk, 'STORAGE',
{'href': '/storage/%s' % (str(node.image.id)),
'name': node.image.name})
ET.SubElement(disk, 'SAVE_AS', {'name': str(name)})
xml = ET.tostring(compute)
url = '/compute/%s' % compute_node_id
resp = self.connection.request(url, method='PUT',
data=xml)
if resp.status == httplib.BAD_REQUEST:
return False
else:
return True
def _to_network(self, element):
"""
Take XML object containing a network description and convert to
OpenNebulaNetwork object.
Take XML representation containing a network description and
convert to OpenNebulaNetwork object.
:return: The newly extracted :class:`OpenNebulaNetwork`.
:rtype: :class:`OpenNebulaNetwork`
"""
return OpenNebulaNetwork(id=element.findtext('ID'),
name=element.findtext('NAME'),
address=element.findtext('ADDRESS'),
size=element.findtext('SIZE'),
driver=self.connection.driver,
extra={'public': element.findtext('PUBLIC')})
class OpenNebula_3_2_NodeDriver(OpenNebula_3_0_NodeDriver):
"""
OpenNebula.org node driver for OpenNebula.org v3.2.
"""
name = 'OpenNebula (v3.2)'
def reboot_node(self, node):
return self.ex_node_action(node, ACTION.REBOOT)
def list_sizes(self, location=None):
"""
Return list of sizes on a provider.
@inherits: :class:`NodeDriver.list_sizes`
:return: List of compute node sizes supported by the cloud provider.
:rtype: ``list`` of :class:`OpenNebulaNodeSize`
"""
return self._to_sizes(self.connection.request('/instance_type').object)
def _to_sizes(self, object):
"""
Request a list of instance types and convert that list to a list of
OpenNebulaNodeSize objects.
Request a list of instance types from the OpenNebula web interface,
and issue a request to convert each XML object representation of an
instance type to an OpenNebulaNodeSize object.
:return: List of instance types.
:rtype: ``list`` of :class:`OpenNebulaNodeSize`
"""
sizes = []
size_id = 1
attributes = [('name', str, None), ('ram', int, 'MEMORY'),
('cpu', float, None), ('vcpu', float, None),
('disk', str, None), ('bandwidth', float, None),
('price', float, None)]
for element in object.findall('INSTANCE_TYPE'):
size_kwargs = {'id': size_id, 'driver': self}
values = self._get_attributes_values(attributes=attributes,
element=element)
size_kwargs.update(values)
size = OpenNebulaNodeSize(**size_kwargs)
sizes.append(size)
size_id += 1
return sizes
def _get_attributes_values(self, attributes, element):
values = {}
for attribute_name, attribute_type, alias in attributes:
key = alias if alias else attribute_name.upper()
value = element.findtext(key)
if value is not None:
value = attribute_type(value)
values[attribute_name] = value
return values
class OpenNebula_3_6_NodeDriver(OpenNebula_3_2_NodeDriver):
"""
OpenNebula.org node driver for OpenNebula.org v3.6.
"""
name = 'OpenNebula (v3.6)'
def create_volume(self, size, name, location=None, snapshot=None):
storage = ET.Element('STORAGE')
vol_name = ET.SubElement(storage, 'NAME')
vol_name.text = name
vol_type = ET.SubElement(storage, 'TYPE')
vol_type.text = 'DATABLOCK'
description = ET.SubElement(storage, 'DESCRIPTION')
description.text = 'Attached storage'
public = ET.SubElement(storage, 'PUBLIC')
public.text = 'NO'
persistent = ET.SubElement(storage, 'PERSISTENT')
persistent.text = 'YES'
fstype = ET.SubElement(storage, 'FSTYPE')
fstype.text = 'ext3'
vol_size = ET.SubElement(storage, 'SIZE')
vol_size.text = str(size)
xml = ET.tostring(storage)
volume = self.connection.request('/storage',
{'occixml': xml},
method='POST').object
return self._to_volume(volume)
def destroy_volume(self, volume):
url = '/storage/%s' % (str(volume.id))
resp = self.connection.request(url, method='DELETE')
return resp.status == httplib.NO_CONTENT
def attach_volume(self, node, volume, device):
action = ET.Element('ACTION')
perform = ET.SubElement(action, 'PERFORM')
perform.text = 'ATTACHDISK'
params = ET.SubElement(action, 'PARAMS')
ET.SubElement(params,
'STORAGE',
{'href': '/storage/%s' % (str(volume.id))})
target = ET.SubElement(params, 'TARGET')
target.text = device
xml = ET.tostring(action)
url = '/compute/%s/action' % node.id
resp = self.connection.request(url, method='POST', data=xml)
return resp.status == httplib.ACCEPTED
def _do_detach_volume(self, node_id, disk_id):
action = ET.Element('ACTION')
perform = ET.SubElement(action, 'PERFORM')
perform.text = 'DETACHDISK'
params = ET.SubElement(action, 'PARAMS')
ET.SubElement(params,
'DISK',
{'id': disk_id})
xml = ET.tostring(action)
url = '/compute/%s/action' % node_id
resp = self.connection.request(url, method='POST', data=xml)
return resp.status == httplib.ACCEPTED
def detach_volume(self, volume):
# We need to find the node using this volume
for node in self.list_nodes():
if type(node.image) is not list:
# This node has only one associated image. It is not the one we
# are after.
continue
for disk in node.image:
if disk.id == volume.id:
# Node found. We can now detach the volume
disk_id = disk.extra['disk_id']
return self._do_detach_volume(node.id, disk_id)
return False
def list_volumes(self):
return self._to_volumes(self.connection.request('/storage').object)
def _to_volume(self, storage):
return StorageVolume(id=storage.findtext('ID'),
name=storage.findtext('NAME'),
size=int(storage.findtext('SIZE')),
driver=self.connection.driver)
def _to_volumes(self, object):
volumes = []
for storage in object.findall('STORAGE'):
storage_id = storage.attrib['href'].partition('/storage/')[2]
volumes.append(self._to_volume(
self.connection.request('/storage/%s' % storage_id).object))
return volumes
class OpenNebula_3_8_NodeDriver(OpenNebula_3_6_NodeDriver):
"""
OpenNebula.org node driver for OpenNebula.org v3.8.
"""
name = 'OpenNebula (v3.8)'
plain_auth = API_PLAIN_AUTH
def _to_sizes(self, object):
"""
Request a list of instance types and convert that list to a list of
OpenNebulaNodeSize objects.
Request a list of instance types from the OpenNebula web interface,
and issue a request to convert each XML object representation of an
instance type to an OpenNebulaNodeSize object.
:return: List of instance types.
:rtype: ``list`` of :class:`OpenNebulaNodeSize`
"""
sizes = []
size_id = 1
attributes = [('name', str, None), ('ram', int, 'MEMORY'),
('cpu', float, None), ('vcpu', float, None),
('disk', str, None), ('bandwidth', float, None),
('price', float, None)]
for element in object.findall('INSTANCE_TYPE'):
element = self.connection.request(
('/instance_type/%s') % (element.attrib['name'])).object
size_kwargs = {'id': size_id, 'driver': self}
values = self._get_attributes_values(attributes=attributes,
element=element)
size_kwargs.update(values)
size = OpenNebulaNodeSize(**size_kwargs)
sizes.append(size)
size_id += 1
return sizes
def _ex_connection_class_kwargs(self):
"""
Set plain_auth as an extra :class:`OpenNebulaConnection_3_8` argument
:return: ``dict`` of :class:`OpenNebulaConnection_3_8` input arguments
"""
return {'plain_auth': self.plain_auth}
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