dynpacker-envvars

Assign EC2 instances environment variables from EC2 User Data and S3 buckets, such as db credentials or 3rd party login credentials.

Install the following way:

curl https://raw.githubusercontent.com/plecto/dynpacker-envvars/master/script.py > /etc/init.d/s3_settings.sh

chmod 755 /etc/init.d/s3_settings.sh
update-rc.d s3_settings.sh defaults

echo "#!/bin/sh
. /tmp/envvars" > /etc/profile.d/ec2_user_data.sh
chmod +x /etc/profile.d/ec2_user_data.sh

Now when logging in, you will have the environment variables from User Data as well as the related S3 bucket in your shell, just like heroku run.

How it finds credentials

Looks for the following S3 bucket: ls-%(CLOUD_ENVIRONMENT)s-credentials and for the following subkeys: %(CLOUD_DEV_PHASE)s/%(CLOUD_APP)s/ wgere the variables should be in EC2 User Data as e.g. 'export CLOUD_ENVIRONMENT=dev'.

See also

App-image-generator