Using Boto to find to which device and EBS Volume is mounted

Question

How do I find to which device an EBS Volume is mounted with Python Boto v2.0?

boto.ec2.Volume has some interesting properies like attachment_state and

Answer 1

It isn't clear if you're running this from the instance itself or externally. If the latter, you will not need the metadata call. Just supply the instance id.

from boto.ec2.connection import EC2Connection
from boto.utils import get_instance_metadata

conn = EC2Connection()
m = get_instance_metadata()
volumes = [v for v in conn.get_all_volumes() if v.attach_data.instance_id == m['instance-id']]

print volumes[0].attach_data.device

Note that an instance may have multiple volumes, so robust code won't assume there's a single device.