I've long been a huge fan of Heroku. They've made it super easy to deploy and scale web applications without getting bogged down in server administration. Also, their free tier has been very generous, which made Heroku a perfect place to run weekend projects. (And my clients have happily paid plenty of money to Heroku over the years, so nobody's been losing out.)

Heroku's costs and limitations

Lately, the costs of using Heroku for weekend projects have been creeping upwards:

  1. Hobby databases with more than 10,000 rows cost $9/month per application.
  2. SSL certificates cost $20/month per application. But increasingly, thanks to the arrival of HTTP 2.0 and widespread eavesdropping, it's looking like we should just encrypt everything, so SSL is going to become increasingly important.
  3. Heroku is beta-testing new types of dynos, and it looks like the free dynos are going to get a lot weaker. There may be a new hobbyist dyno for $7/month per application.

Now, I value my time pretty highly, but if I'm reading the tea leaves correctly, it looks like I might be paying as much as $9+$20+$7 = $36/month per application, unless Heroku also overhauls their add-on pricing. And there are other issues with Heroku:

  1. Heroku dynos aren't going to win any awards for speed.
  2. Heroku only supports web applications, so I still need to pay Linode for an actual server.

So what am I looking for? I just want some professional-looking way to throw my weekend hacks up in the cloud. Oh, and it would be nice if my hobby projects used the same toolchain as my professional ones.

Deploying to an Amazon t2.small using Docker Machine

I was never impressed by Amazon's old t1.micro instances—they were slow and laggy. But the new t2.small instances have 2GB of RAM, and they feel fairly snappy. And they cost $15–20/month.

Let's begin by creating a t2.small on EC2 using docker-machine:

docker-machine create -d amazonec2 \
  --amazonec2-access-key=$AWS_ACCESS_KEY_ID \
  --amazonec2-secret-key=$AWS_SECRET_ACCESS_KEY \
  --amazonec2-instance-type=t2.small \
  --amazonec2-vpc-id=$MY_VPC_ID \

Here, $MY_VPC_ID is the ID of the default "virtual private cloud" that seems to have come with my account. This command will create an Ubuntu 14.04 server, install Docker, set up SSH keys, and configure SSL certificates for Docker authentication. We also need to go to our newly-created docker-machine security group and open up the HTTP port.

While we're it, let's set up an Elastic IP address using the AWS console, and bind it to our server using the EC2 command-line tools and the nifty jq JSON parser:

INSTANCE_ID="`docker-machine inspect example | jq -r .Driver.InstanceId`"
ec2-associate-address $MY_ELASTIC_IP -i "$INSTANCE_ID" \

Finally, let's point our local docker client at the new server, and deploy a test application:

eval "$(docker-machine env example)"
docker run -d -p 80:5000 --name test luisbebop/docker-sinatra-hello-world

Try accessing $MY_ELASTIC_IP in a web browser. When you're done, tear it down:

docker stop test && docker rm test

Setting up nginx and a simple application using docker-compose

Create a directory nginx containing a Dockerfile with the following contents:

FROM nginx
ADD conf.d /etc/nginx/conf.d

Then create a file conf.d/test.conf containing the following, replacing test.example.com with a domain name that you've pointed at your new server:

upstream test {
  server test:5000;

server {
  listen 80;
  server_name test.example.com;

  location / {
    proxy_pass http://test;

This allows us to serve multiple hostnames from one IP address. We can also set up SSL, http password authentication, or any other nginx options we want.

Next, we want to build a new docker image using this configuration:

docker build -t nginx-proxy .

And now we can install docker-compose and create a file docker-compose.yml containing:

  image: "luisbebop/docker-sinatra-hello-world"
  restart: "always"

  image: "nginx-proxy"
  restart: "always"
    - "test"
    - "80:80"

All that's left to do is to launch our new suite of applications:

docker-compose up -d

# Take a look.
docker ps

Packaging up a Heroku-style application with a buildpack

If you want to package up pre-existing Heroku application with a Procfile, you can use buildpack-runner as a starting point. For example, here's how I packaged a Java web application that listened on port 8080:

FROM centurylink/buildpack-runner
CMD ["/start", "web"]

This can then be built into a named image, added to our docker-compose.yml, and given a *.conf file (and a links entry in our nginx setup). Of course, if our application needed a database, we'd also need to pass in some environment variables in docker-compose.yml. We could either run our database in a Docker container, or we could set up an Amazon RDS database.

Next steps

Need a mail server? A private docker registry? You can use off-the-shelf images or build your own, and just toss them into docker-compose.yml. Then re-run docker-compose up -d. Don't forget to open any new ports in your EC2 security group.

Once you get the basics down, you might want to check out dokku or flynn, which provide a more Heroku-like experience. But it's pretty easy to wire up basic hobby projects using docker-machine and docker-compose, and to get something which is faster and cheaper than Heroku—and considerably more flexible.