asg check

asgcheck.py

import boto3

REGIONS=['us-west-2', 'us-east-1', 'eu-central-1', 'ap-northeast-1']

class ASGChecker:
    def __init__(self, region):
        self.region = region
        self.asgclient = boto3.client('autoscaling', region_name=region)
        self.elbclient = boto3.client('elb', region_name=region)

    def get_asg_bound_elbs(self):
        unique_elbs = set()
        asg_response = self.asgclient.describe_auto_scaling_groups()
        for asg in asg_response[u'AutoScalingGroups']:
            print(asg[u'AutoScalingGroupName'])
            #print(asg['LoadBalancerNames'])
            for elb in asg[u'LoadBalancerNames']:
                print("Adding ", elb)
                unique_elbs.add(elb)
        return unique_elbs

    def check_existing_elbs(self, asg_elbs):
        elb_response = self.elbclient.describe_load_balancers()
        elbs = elb_response[u'LoadBalancerDescriptions']
        elb_names = set(map(lambda e: e[u'LoadBalancerName'], elbs))
        #print(elb_names)
        if asg_elbs <= elb_names:
            print("ALL bound ELBs exist in", self.region)
        else:
            print("Not all bound ELBs exist:")
            print(esg_elbs - elb_names)

    def run(self):
        print("Checking ASGs in", self.region)
        self.check_existing_elbs(self.get_asg_bound_elbs())

for region in REGIONS:
    ASGChecker(region).run()