Script to update ALL the ECS agents on the specified regions

ecs-agents-updater.py

#!/usr/bin/python3
#
# This will update ALL the ECS agents on the specified regions
# Requires: pip3 install boto3
#
# You can use this with https://github.com/mheffner/awsam
# for easy AWS vars management, eg:
# aem use pingdom-prod
# aenv python3 ecs-agents-updater.py

import boto3

regions = ['eu-west-1','us-east-1']

updated_agents = 0

for region in regions:
    client = boto3.client('ecs',region_name=region)

    ecs_clusters = client.list_clusters()

    print('Attemping to update ECS agents on {}..'.format(region))

    # Iterate through the ECS clusters
    for ecs_cluster in ecs_clusters['clusterArns']:

        instances = client.list_container_instances(
            cluster=ecs_cluster,
            status='ACTIVE'
        )

        # Iterate through the ECS Instances in the cluster
        for instance in instances['containerInstanceArns']:

            try:
            # Attempt to Update the ECS Agent on the instance
                updater = client.update_container_agent(
                   cluster=ecs_cluster,
                   containerInstance=instance
                )
            except client.exceptions.NoUpdateAvailableException:
                pass
            except client.exceptions.UpdateInProgressException:
                print('Update is already in progress on instance {}'.format(instance))
            else:
                print('Updating ECS agent on instance {}'.format(instance)) 
                updated_agents += 1

    print('Total number of ECS Agents updated on region {}: {}'.format(region,updated_agents))
    print('')