Fix errant lifecycle hooks that codedeploy likes to leave within your autoscaling groups.

codedeploy-fix.py

import boto3

autoscaling = boto3.client('autoscaling')
codedeploy  = boto3.client('codedeploy')

hookMap = {}

print 'Gathering valid lifecycle hooks from CodeDeploy deployment groups...'
for applicationName in codedeploy.list_applications()['applications']:
    for deploymentGroupName in codedeploy.list_deployment_groups(applicationName=applicationName)['deploymentGroups']:
        deploymentGroup = codedeploy.get_deployment_group(
            applicationName=applicationName,
            deploymentGroupName=deploymentGroupName
        )
        for autoScalingGroup in deploymentGroup['deploymentGroupInfo'].get('autoScalingGroups', []):
            if autoScalingGroup['name'] not in hookMap:
                hookMap[autoScalingGroup['name']] = []
            hookMap[autoScalingGroup['name']].append(autoScalingGroup['hook'])

deleted = 0
for AutoScalingGroupName, validHooks in hookMap.iteritems():
    response = autoscaling.describe_lifecycle_hooks(AutoScalingGroupName=AutoScalingGroupName)
    for LifecycleHook in response['LifecycleHooks']:
        if LifecycleHook['LifecycleHookName'] not in validHooks:
            print 'Deleting %s from %s...' % ( LifecycleHook['LifecycleHookName'], AutoScalingGroupName)
            response = autoscaling.delete_lifecycle_hook(
                LifecycleHookName=LifecycleHook['LifecycleHookName'],
                AutoScalingGroupName=AutoScalingGroupName
            )
            deleted += 1

print 'Done.' if deleted > 0 else 'All is good.'