ssm-env

ssm-env is a simple UNIX tool to populate env vars from AWS Parameter Store.

Usage

ssm-env [-template STRING] [-with-decryption] COMMAND

Details

Given the following environment:

RAILS_ENV=production
COOKIE_SECRET=ssm://prod.app.cookie-secret

You can run the application using ssm-env to automatically populate the COOKIE_SECRET env var from SSM:

$ ssm-env env
RAILS_ENV=production
COOKIE_SECRET=super-secret

You can also configure how the parameter name is determined for an environment variable, by using the -template flag:

$ export COOKIE_SECRET=xxx
$ ssm-env -template '{{ if eq .Name "COOKIE_SECRET" }}prod.app.cookie-secret{{end}}' env
RAILS_ENV=production
COOKIE_SECRET=super-secret

Installation

$ go get -u github.com/remind101/ssm-env

You can most likely find the downloaded binary in ~/go/bin/ssm-env

Usage with Docker

A common use case is to use ssm-env as a Docker ENTRYPOINT. You can copy and paste the following into the top of a Dockerfile:

RUN curl -L https://github.com/remind101/ssm-env/releases/download/v0.0.2/ssm-env > /usr/local/bin/ssm-env && \
      cd /usr/local/bin && \
      echo ad0f184da3a6536d0614ce4133ceb23b  ssm-env | md5sum -c && \
      chmod +x ssm-env
ENTRYPOINT ["/usr/local/bin/ssm-env", "-with-decryption"]

Now, any command executed with the Docker image will be funneled through ssm-env.