README.md

Prune EBS Snapshots

Prerequisites

You'll also need a working Go environment to build a distribution

For working with the Go runtime in AWS Lambda. See lambda-go-how-to-create-deployment-package

To Build

The Lambda execution environment uses a Linux kernel, so you'll need to build the binary for linux

A good way to do this if you don't have Go installed is to use Docker:

cd infra/terraform/global/assets/prune_ebs_snapshots
docker run -it -v "$(pwd)":/src golang:alpine sh

This will start a Docker container with Go installed and launch a shell. From there you need to install git and the aws client library:

cd /src
apk add git
go get github.com/aws/aws-sdk-go

Then you can compile the binary using the following command:

GOOS=linux go build prune_ebs_snapshots.go

To Deploy

Once you have built a binary/distribution with the command above, deploy the lambda function with the terraform commands below

Note the commands below assume you are at the root of the repository

terraform plan -target=module.kubernetes_prune_ebs_snapshots -var-file=infra/terraform/global/assets/prune_ebs_snapshots/vars_prune_ebs_snapshots.tfvars

terraform apply -target=module.kubernetes_prune_ebs_snapshots -var-file=infra/terraform/global/assets/prune_ebs_snapshots/vars_prune_ebs_snapshots.tfvars

To Test

Optionally set environment variables to filter resources. My filter below states that I only want to target ebs snapshots with a tag that matches key etcd with the value 1 that are at least a week old.

export SNAPSHOT_TAG_KEY=etcd
export SNAPSHOT_TAG_VALUE=1
export DAYS_OLD=7

Note: If testing locally, you may need to set the region in your ~/.aws/config file or by setting AWS_REGION environment variable.

Test by running go run prune_ebs_snapshots.go