AWS Snapshot Cleanup

Install

Create an artifact

Prepare dependencies:

$ rm -rf node_modules/
$ npm install --production

Create and edit config file:

$ cp example_config.json config.json

Create lambda.zip file:

$ ./bundle.sh

Upload lambda.zip file to S3.

Create CloudFormation stack

Create CloudFormation stack based on template template.json.

Configuration

DryRun

Set to true if you don't want to delete snapshots but see what is going on.

Region

AWS region (e. g. eu-west-1)

Filters

Array of Object of {"Name": "xxx": "Values": ["yyy"]}

Valid names are:

• description - A description of the snapshot.
• owner-alias - The AWS account alias (for example, amazon) that owns the snapshot.
• owner-id - The ID of the AWS account that owns the snapshot.
• progress - The progress of the snapshot, as a percentage (for example, 80%).
• snapshot-id - The snapshot ID.
• start-time - The time stamp when the snapshot was initiated.
• status - The status of the snapshot (pending | completed | error).
• tag:$key - The key/value combination of a tag assigned to the resource. replace $tag with the name of the tag.
• tag-key - The key of a tag assigned to the resource. This filter is independent of the tag-value filter. For example, if you use both the filter "tag-key=Purpose" and the filter "tag-value=X", you get any resources assigned both the tag key Purpose (regardless of what the tag's value is), and the tag value X (regardless of what the tag's key is). If you want to list only resources where Purpose is X, see the tag:key=value filter.
• tag-value - The value of a tag assigned to the resource. This filter is independent of the tag-key filter.
• volume-id - The ID of the volume the snapshot is for.
• volume-size - The size of the volume, in GiB.

Rules

minSnapshots

Keep at least minSnapshots Snapshots even if this violates the maxAgeInDays rule.

minAgeInDays

Snapshots younger than minAgeInDays days will be kept.

maxAgeInDays

Snapshots older than maxAgeInDays days will be deleted.

maxSnapshots

Snapshots to keep between minAgeInDays and maxAgeInDays days. An exponential strategy is used which keeps more young snapshots than old ones.

Example: If you want to keep max 50 snapshots between 2015-10-31 and 2015-10-01:

Sat Oct 31 2015 23:59:59
Sat Oct 31 2015 23:17:46
Sat Oct 31 2015 22:31:19
Sat Oct 31 2015 21:40:14
Sat Oct 31 2015 20:44:01
Sat Oct 31 2015 19:42:12
Sat Oct 31 2015 18:34:12
Sat Oct 31 2015 17:19:24
Sat Oct 31 2015 15:57:07
Sat Oct 31 2015 14:26:36
Sat Oct 31 2015 12:47:02
Sat Oct 31 2015 10:57:31
Sat Oct 31 2015 08:57:02
Sat Oct 31 2015 06:44:31
Sat Oct 31 2015 04:18:45
Sat Oct 31 2015 01:38:24
Fri Oct 30 2015 22:42:01
Fri Oct 30 2015 19:27:59
Fri Oct 30 2015 15:54:34
Fri Oct 30 2015 11:59:47
Fri Oct 30 2015 07:41:33
Fri Oct 30 2015 02:57:29
Thu Oct 29 2015 21:45:00
Thu Oct 29 2015 16:01:16
Thu Oct 29 2015 09:43:11
Thu Oct 29 2015 02:47:16
Wed Oct 28 2015 19:09:46
Wed Oct 28 2015 10:46:32
Wed Oct 28 2015 01:32:57
Tue Oct 27 2015 15:24:02
Tue Oct 27 2015 04:14:12
Mon Oct 26 2015 15:57:24
Mon Oct 26 2015 02:26:55
Sun Oct 25 2015 11:35:23
Sat Oct 24 2015 19:14:42
Sat Oct 24 2015 01:15:57
Fri Oct 23 2015 05:29:19
Thu Oct 22 2015 07:44:01
Wed Oct 21 2015 07:48:12
Tue Oct 20 2015 05:28:48
Mon Oct 19 2015 00:31:27
Sat Oct 17 2015 16:40:22
Fri Oct 16 2015 05:38:11
Wed Oct 14 2015 15:05:47
Mon Oct 12 2015 20:42:08
Sat Oct 10 2015 22:04:07
Thu Oct 08 2015 18:46:18
Tue Oct 06 2015 10:20:43
Sat Oct 03 2015 20:16:34
Thu Oct 01 2015 00:00:00