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# Copyright (c) 2006,2007 Mitch Garnaat http://garnaat.org/
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
"""
Represents an EC2 Elastic IP Volume
"""
from boto.ec2.ec2object import EC2Object
class Volume(EC2Object):
def __init__(self, connection=None):
EC2Object.__init__(self, connection)
self.id = None
self.create_time = None
self.status = None
self.size = None
self.snapshot_id = None
self.attach_data = None
self.zone = None
def __repr__(self):
return 'Volume:%s' % self.id
def startElement(self, name, attrs, connection):
if name == 'attachmentSet':
self.attach_data = AttachmentSet()
return self.attach_data
else:
return None
def endElement(self, name, value, connection):
if name == 'volumeId':
self.id = value
elif name == 'createTime':
self.create_time = value
elif name == 'status':
if value != '':
self.status = value
elif name == 'size':
self.size = int(value)
elif name == 'snapshotId':
self.snapshot_id = value
elif name == 'availabilityZone':
self.zone = value
else:
setattr(self, name, value)
def _update(self, updated):
self.updated = updated
if hasattr(updated, 'create_time'):
self.create_time = updated.create_time
if hasattr(updated, 'status'):
self.status = updated.status
else:
self.status = None
if hasattr(updated, 'size'):
self.size = updated.size
if hasattr(updated, 'snapshot_id'):
self.snapshot_id = updated.snapshot_id
if hasattr(updated, 'attach_data'):
self.attach_data = updated.attach_data
if hasattr(updated, 'zone'):
self.zone = updated.zone
def update(self):
rs = self.connection.get_all_volumes([self.id])
if len(rs) > 0:
self._update(rs[0])
return self.status
def delete(self):
"""
Delete this EBS volume.
:rtype: bool
:return: True if successful
"""
return self.connection.delete_volume(self.id)
def attach(self, instance_id, device):
"""
Attach this EBS volume to an EC2 instance.
:type instance_id: str
:param instance_id: The ID of the EC2 instance to which it will
be attached.
:type device: str
:param device: The device on the instance through which the
volume will be exposted (e.g. /dev/sdh)
:rtype: bool
:return: True if successful
"""
return self.connection.attach_volume(self.id, instance_id, device)
def detach(self, force=False):
"""
Detach this EBS volume from an EC2 instance.
:type force: bool
:param force: Forces detachment if the previous detachment attempt did
not occur cleanly. This option can lead to data loss or
a corrupted file system. Use this option only as a last
resort to detach a volume from a failed instance. The
instance will not have an opportunity to flush file system
caches nor file system meta data. If you use this option,
you must perform file system check and repair procedures.
:rtype: bool
:return: True if successful
"""
instance_id = None
if self.attach_data:
instance_id = self.attach_data.instance_id
device = None
if self.attach_data:
device = self.attach_data.device
return self.connection.detach_volume(self.id, instance_id, device, force)
def create_snapshot(self, description=None):
"""
Create a snapshot of this EBS Volume.
:type description: str
:param description: A description of the snapshot. Limited to 256 characters.
:rtype: bool
:return: True if successful
"""
return self.connection.create_snapshot(self.id, description)
def volume_state(self):
"""
Returns the state of the volume. Same value as the status attribute.
"""
return self.status
def attachment_state(self):
"""
Get the attachmentSet information for the volume. This info is stored
in a dictionary object and contains at least the following info:
- volumeId
- instanceId
- device
- status
- attachTime
"""
state = None
if self.attach_data:
state = self.attach_data.status
return state
def snapshots(self, owner=None, restorable_by=None):
"""
Get all snapshots related to this volume. Note that this requires
that all available snapshots for the account be retrieved from EC2
first and then the list is filtered client-side to contain only
those for this volume.
:type owner: str
:param owner: If present, only the snapshots owned by the specified user
will be returned. Valid values are:
self | amazon | AWS Account ID
:type restorable_by: str
:param restorable_by: If present, only the snapshots that are restorable
by the specified account id will be returned.
:rtype: list of L{boto.ec2.snapshot.Snapshot}
:return: The requested Snapshot objects
"""
rs = self.connection.get_all_snapshots(owner=owner,
restorable_by=restorable_by)
mine = []
for snap in rs:
if snap.volume_id == self.id:
mine.append(snap)
return mine
class AttachmentSet(object):
def __init__(self):
self.id = None
self.instance_id = None
self.status = None
self.attach_time = None
self.device = None
def __repr__(self):
return 'AttachmentSet:%s' % self.id
def startElement(self, name, attrs, connection):
pass
def endElement(self, name, value, connection):
if name == 'volumeId':
self.id = value
elif name == 'instanceId':
self.instance_id = value
elif name == 'status':
self.status = value
elif name == 'attachTime':
self.attach_time = value
elif name == 'device':
self.device = value
else:
setattr(self, name, value)
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