mirror of
https://gitlab.com/ser-cal/m346.git
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63 lines
1.8 KiB
Python
63 lines
1.8 KiB
Python
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import boto3
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import collections
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import datetime
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ec = boto3.client('ec2')
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def lambda_handler(event, context):
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reservations = ec.describe_instances(
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Filters=[
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{'Name': 'tag-key', 'Values': ['backup', 'Backup']},
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]
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).get(
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'Reservations', []
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)
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instances = sum(
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[
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[i for i in r['Instances']]
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for r in reservations
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], [])
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print ('Found %d instances that need backing up' % len(instances))
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to_tag = collections.defaultdict(list)
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for instance in instances:
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try:
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retention_days = [
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int(t.get('Value')) for t in instance['Tags']
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if t['Key'] == 'Retention'][0]
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except IndexError:
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retention_days = 7
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for dev in instance['BlockDeviceMappings']:
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if dev.get('Ebs', None) is None:
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continue
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vol_id = dev['Ebs']['VolumeId']
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print ("Found EBS volume %s on instance %s" % (vol_id, instance['InstanceId']))
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snap = ec.create_snapshot(
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VolumeId=vol_id,
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)
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to_tag[retention_days].append(snap['SnapshotId'])
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print ("Retaining snapshot %s of volume %s from instance %s for %d days" % (
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snap['SnapshotId'],
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vol_id,
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instance['InstanceId'],
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retention_days,
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))
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for retention_days in to_tag.keys():
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delete_date = datetime.date.today() + datetime.timedelta(days=retention_days)
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delete_fmt = delete_date.strftime('%Y-%m-%d')
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print ("Will delete %d snapshots on %s" % (len(to_tag[retention_days]), delete_fmt))
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ec.create_tags(
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Resources=to_tag[retention_days],
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Tags=[
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{'Key': 'DeleteOn', 'Value': delete_fmt},
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]
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)
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