AWS lambda function for automatic snapshots of EC2 instances

ec2-backup.py

import json
import boto3
import json
import time
import datetime

ec2 = boto3.resource('ec2')

print('Loading function')


def lambda_handler(event, context):
    for i in ec2.instances.all():
            for tag in i.tags:
                if tag['Key'] == 'Name':
                    instance_name = tag['Value']
                    print(instance_name)

            vol_id = i.block_device_mappings[0]['Ebs']['VolumeId']
            print(vol_id)

            volume = ec2.Volume(vol_id)
            print(volume.size)

            snapshot = volume.create_snapshot()
            tag = snapshot.create_tags(
                Tags=[
                {
                    'Key': 'Name',
                    'Value': instance_name
                }
            ]
            )

            snps = ec2.snapshots.filter(
                Filters=[
                    {
                        'Name': 'tag:Name',
                        'Values': [
                            instance_name,
                        ]
                    }
                ]
            )
            
            for snp in snps:
                if time.time() - int(time.mktime(snp.start_time.timetuple())) > 3600*24*7:
                    print("delete:", snp.snapshot_id)
                    snp.delete()
            

    return True