Easy way to snap all volumes on an instance.

aws_ebs_snaps.py

import boto
import datetime

def lookup_instance_by_id(instance_id):
    conn = boto.connect_ec2()
    try:
        instance = conn.get_all_instances(filters = {'instance_id':instance_id})[0].instances[0]
    except IndexError:
        return False
    if instance.state != 'terminated':
        return instance
    else:
        debug("Instance %s is terminated" % instance_id)
        return False

def snap_instance_volumes(instance=None, expire_hours=0, expire_days=0, expire_weeks=1):
    """ Takes instance id __OR__ instance object
        creates dated and labeled snapshots of all an instance's attached volumes
        snaps set to expire after 1 week (clean-up by expiration process that needs to
          be run regularly)"""

    expire_hours = int(expire_hours) + (int(expire_days) * 24 ) + (int(expire_weeks) * 7 * 24)
    conn = boto.connect_ec2()
    try:
        __foo = instance.id
    except AttributeError:
        lookedup_instance = lookup_instance_by_id(instance)
        if lookedup_instance is False:
            print "No Such instance %s" % instance
            return False
        else:
            instance = lookedup_instance
    timestamp = datetime.datetime.now()
    expire_datetime = timestamp + datetime.timedelta(hours=expire_hours)
    snaps = []
    for attach_point,bdm in instance.block_device_mapping.iteritems():
        try:
            instance_name = instance.tags['Name']
        except KeyError:
            instance_name = instance.id

        volume = conn.get_all_volumes(filters={"volume_id":bdm.volume_id})[0]
        description = "%s^%s^%s" % (instance.id, instance_name, timestamp)
        snapshot = volume.create_snapshot(description)
        print snapshot, volume.attach_data.device, description
        conn.create_tags([snapshot.id], {
            'Name': "%s %s" % (instance_name, volume.attach_data.device),
            'device': volume.attach_data.device,
            'datetime': timestamp,
            'instance_id': instance.id,
            'expire': expire_datetime,
            'image_id': instance.image_id,
            })
        snaps.append(snapshot)
    return snaps