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Deployable

This is an example distributed Elixir app with a pre-baked CloudFormation VPC stack, ready for use on AWS. Some features:

  • Automatic deployment with CodeDeploy
  • Building/releasing using distillery
  • Multiple availability zones for fault tolerance
  • Auto-scaling and load-balancing
  • Networked Elixir nodes with discovery
  • Live upgrades for the Elixir apps

Features I'm hoping to add:

  • Helpers for remote monitoring over SSH
  • Solutions for logging/monitoring/metrics
  • Database with RDS

Usage

  • Make an AWS key pair for the instances
  • Make a KMS key to encrypt secrets
  • Make 2 S3 buckets: one for code deployments, and one for server config
  • Change variables in script/vars accordingly
  • script/setup_secrets to set up secrets config
  • script/put_secrets (after editing priv/secrets.txt) to put initial secrets
  • script/create_stack to make the initial release/stack (you can also use this script to update the stack if you make changes to the template)
  • script/release to cut a new release and deploy (make sure the app version is incremented)

Caveat Emptor

I am not an expert in AWS, networking, or security, so it is highly likely that this is not production-ready (I made it for the learning experience). Use with caution!

Acknowledgments

The template for the CloudFormation stack is based on sample code from AWS In Action (Manning, 2015).