This project is used for generating LetsEncrypt SSL certificates and importing them into Amazon's Certificate Manager. This project is based on letsencrypt-aws by Alex Gaynor.

Configuration

Configuration is read in via the LETSENCRYPT_AWS_CONFIG environment variable. This should be a JSON object with the following schema:

{
    "domains": [
        {
            "certificate_arn": "AWS ACM ARN (string)",
            "hosts": ["list of hosts you want on the certificate (strings)"],
            "key_type": "rsa or ecdsa, optional, defaults to rsa (string)"
        }
    ],
    "acme_account_key": "location of the account private key (string)",
    "acme_directory_url": "optional, defaults to Let's Encrypt production (string)"
}

The acme_account_key should be in S3 and is configured in the format "s3://bucket-name/object-name". The key should be a PEM formatted RSA private key.

Using Docker

Basic usage with AWS_PROFILE set

docker run \
  --rm \
  -e AWS_PROFILE=$AWS_PROFILE \
  -e LETSENCRYPT_AWS_CONFIG="$(cat $(pwd)/config.json)" \
  -v ${HOME}/.aws:/root/.aws \
  bartlettc/letsencrypt-acm \
  update-certificates

Saving certificates as file

If you want the cert saved as a file as well, simply mount the /certs directory. i.e. -v $(pwd)/certs:/certs. For example:

docker run \
  --rm \
  -e AWS_PROFILE=$AWS_PROFILE \
  -e LETSENCRYPT_AWS_CONFIG="$(cat $(pwd)/config.json)" \
  -v ${HOME}/.aws:/root/.aws \
  -v $(pwd)/certs:/certs \
  bartlettc/letsencrypt-acm \
  update-certificates