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https://github.com/kevingruesser/bootstrap-vz.git
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68 lines
2.8 KiB
Python
68 lines
2.8 KiB
Python
from bootstrapvz.base.fs.volume import Volume
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from bootstrapvz.base.fs.exceptions import VolumeError
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class EBSVolume(Volume):
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def create(self, conn, zone, tags=[]):
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self.fsm.create(connection=conn, zone=zone, tags=tags)
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def _before_create(self, e):
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self.conn = e.connection
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zone = e.zone
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tags = e.tags
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size = self.size.bytes.get_qty_in('GiB')
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self.volume = self.conn.create_volume(Size=size,
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AvailabilityZone=zone,
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VolumeType='gp2',
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TagSpecifications=[{'ResourceType': 'volume', 'Tags': tags}])
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self.vol_id = self.volume['VolumeId']
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waiter = self.conn.get_waiter('volume_available')
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waiter.wait(VolumeIds=[self.vol_id],
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Filters=[{'Name': 'status', 'Values': ['available']}])
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def attach(self, instance_id):
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self.fsm.attach(instance_id=instance_id)
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def _before_attach(self, e):
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import os.path
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import string
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self.instance_id = e.instance_id
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for letter in string.ascii_lowercase[5:]:
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dev_path = os.path.join('/dev', 'xvd' + letter)
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if not os.path.exists(dev_path):
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self.device_path = dev_path
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self.ec2_device_path = os.path.join('/dev', 'sd' + letter)
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break
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if self.device_path is None:
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raise VolumeError('Unable to find a free block device path for mounting the bootstrap volume')
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self.conn.attach_volume(VolumeId=self.vol_id,
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InstanceId=self.instance_id,
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Device=self.ec2_device_path)
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waiter = self.conn.get_waiter('volume_in_use')
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waiter.wait(VolumeIds=[self.vol_id],
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Filters=[{'Name': 'attachment.status', 'Values': ['attached']}])
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def _before_detach(self, e):
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self.conn.detach_volume(VolumeId=self.vol_id,
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InstanceId=self.instance_id,
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Device=self.ec2_device_path)
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waiter = self.conn.get_waiter('volume_available')
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waiter.wait(VolumeIds=[self.vol_id],
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Filters=[{'Name': 'status', 'Values': ['available']}])
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del self.ec2_device_path
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self.device_path = None
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def _before_delete(self, e):
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self.conn.delete_volume(VolumeId=self.vol_id)
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def snapshot(self):
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snapshot = self.conn.create_snapshot(VolumeId=self.vol_id)
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self.snap_id = snapshot['SnapshotId']
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waiter = self.conn.get_waiter('snapshot_completed')
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waiter.wait(SnapshotIds=[self.snap_id],
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Filters=[{'Name': 'status', 'Values': ['completed']}])
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return self.snap_id
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