Amazon EC2 EBS volume snapshot

SnapShot.py

import boto

# variable settings for instance 
snapshots = [("vol-ID", 7)]
instanceID = 'ID'
description = "automated backup"

print "Starting Snapshot Process"

#credentials from boto.cfg
ec2 = boto.connect_ec2()
instance = ec2.get_all_instances([instanceID])[0].instances[0]

for volume, keep_days in snapshots:
    snaps = ec2.get_all_snapshots(filters={"volume-id":volume, "description": description})

    print "%s: Creating Snapshot. %s automated snapshots currently exist. " % (volume, len(snaps))
    ec2.create_snapshot(volume, description)
    
    oldSnaps = sorted(snaps, key=lambda x: x.start_time)[:-keep_days]
    print "Deleting snapshots for %s > %s: %s" % (volume, keep_days, oldSnaps)
    
    for snap in oldSnaps:
        ec2.delete_snapshot(snap.id)
    
print "Snapshot process finished"