Creates automatic EBS snapshots with Lambda and CloudWatch events. Uses volume tags to choose what to snapshot. Will automatically clean up old snapshots with a configureable window.
There are two ways to install this lambda, manually or with the supplied script. Both ways require you to first configure a Lambda IAM role that has access to create EC2 snapshots.
For automatic mode you must have a working copy of both the awscli (with permission to install Lambdas and CloudWatch events) and jq. Copy your lambda role arn string then execute:
$ ./deploy.sh "arn:aws:iam::1234567890:role/SOMEROLE"
You're done!
To manually install, create a new Lambda function configured for Python and install
the autosnap.py script. Next add a trigger that is based on a CloudWatch event.
Works best as a daily cron like cron(0 0 * * ? *). See deploy.sh for hints.
The script will look for any EBS volumes with a tag name of autosnap. Once found
it will auto create a snapshot with a -autosnap suffix. It will then look for
snapshots with that suffix and delete any that are older than 3 days by default.
You can change how long it saves snapshots by setting the RETENTION environment
variable in your Lambda function (or go crazy and edit the script).