Creates AWS AMIs for multiple configured EC2 instance IDs

amiBackups.py

#!/usr/bin/python
#
# This script will create an AMI for each of the instances listed in the 
# instance_ids list. It will also clean up AMIs based on the images_to_keep 
# variable. The cleanup logic has no concept of time so the images are just
# deleted based on number.  It is recommended to run the script daily from 
# cron during off peak time and by default keep 7 days.
#

import boto, boto.ec2
import datetime
import time

#Number of images to keep
images_to_keep = 7

b = boto.ec2.connect_to_region("us-east-1")

#Get instance ID from metadata
metadata = boto.utils.get_instance_metadata()
#instance_id = metadata['instance-id']
instance_ids = ['i-xxxxxxxx','i-xxxxxxxx','i-xxxxxxxx']

#Get instance Name tag
instance_reservation = b.get_all_instances( instance_ids )

for reservation in instance_reservation:
  for instance in reservation.instances:
    #Get Current Date
    date = str( datetime.datetime.now() )

    instance_name = instance.tags['Name']
    instance_id = instance.id

    AMI_name = instance_id + "_" + date
    #Replace : with - in the timestamp portion of the AMI Name
    AMI_name = AMI_name.replace(":", "-")

    print "Creating AMI with these properties:"
    print "   AMI Name: " + AMI_name
    print "   Name Tag: " + instance_name
    print "   Instance ID Tag: " + instance_id
    print "   Date Tag: " + date

    #break
    #sys.exit()

    #Create the AMI
    image_id = b.create_image(instance_id,AMI_name,no_reboot=True)

    #Tag the AMI with the instance name tag, id, and date
    new_image = b.get_image(image_id)
    new_image.add_tag("Name", instance_name)
    new_image.add_tag("Instance", instance_id)
    new_image.add_tag("Date", date)

    print "AMI requested (" + str(image_id) + "), waiting for state to change to available."

    #Wait for image to become available
    while b.get_image(image_id).state != "available":
        #print "  current state: " + str(b.get_image(image_id).state)
        time.sleep(5)

    print "AMI is available."



############################
# Clean up old images
############################

print "Cleaning up old images."

for reservation in instance_reservation:
  for instance in reservation.instances:

    instance_name = instance.tags['Name']
    instance_id = instance.id

    #Get list of images for instance ID tag
    images = b.get_all_images(owners=['self'], filters={ "tag:Instance" : instance_id })

    #Sort function
    def getImageDate(image):
      return image.tags.get("Date")

    images.sort(key=getImageDate, reverse = True)

    for image in images:
      nametag = image.tags.get("Name")
      idtag = image.tags.get("Instance")
      datetag = image.tags.get("Date")

    for i in range(images_to_keep, len(images)):
      print "Deleting " + " " + str(images[i]) + " : " + str(images[i].tags.get("Date"))
      b.deregister_image(images[i].id, delete_snapshot=True)

b.deregister_image(images[i].id, delete_snapshot=True)

delete_snapshot=True is not available in boto3. Any suggestions?