do-autoscale

README

do-autoscale

Deploy an autoscale to automatically scale your servers based on load.

Install

Automated Droplet configuration

If you use doctl, you can create a server using the following: doctl compute droplet create <name> --region nyc1 --size 4gb --image ubuntu-16-04-x64 --user-data-file userdata.sh --ssh-keys <your key id>. userdata.sh can be retrieved from https://s3.pifft.com/autoscale/userdata.sh.

Manual Droplet configuration

1. Create a Ubuntu 16.04 Droplet. The autoscaler was designed with a 4GB Droplet in mind.
2. Download autoscalectl from https://s3.pifft.com/autoscale/autscalectl, and mark it executeable

Running setup

Run autoscalectl setup

The setup process requires:

• DigitalOcean access token
• Fully qualified domain name for SSL configuration
• TLS certs/key (letsencrypt can also be used)
• Password for accessing the site

If you choose to use your own key/certs, place them in the /etc/autoscale/ssl directory and name them autoscale.crt and autoscale.key. You should ensure to chmod 600 autoscale.key for safetey.

Usage

Navigate to https://your.host.com and use autoscale as your user name, and the password you chose earlier as your password.

Upgrading

Run autoscalectl update to update the autoscaler..

Building

In line with typical Go thoughts, all generated assets are checked into the repo. This assists continuous integration as Docker containers can be built without having to generate any assets.

The application is automatically built and deployed from Travis CI to Docker Hub.