Heroku Has Launched

Well, just a very short time after I started using Heroku, they went commercial. Yes, after their very successful beta period, where apparently 24,999 web sites other than mine were already hosting, Heroku is now offering a paid version of their service. I had a sneak peak at the pricing a few days ahead of time, but I was not able to talk. And despite my intentions of blogging this right away, the other demands on my time have kept me occupied till just now.

Heroku is mimicking the successful "freemium" pricing plan of other services, but brings it into the Ruby web application hosting space, within some pretty generous limitations. Yes, exactly. Heroku still allows you to get started with their service at no charge at all. Wow. I do not know of any free web hosting service that does not at minimum plaster your site with hideous ads. Let alone quality Ruby hosting. Let alone Ruby powered cloud computing.

As your traffic needs increase, or database storage needs, they have a variety of pricing tiers. Thanks to a slick AJAXified pricing tool, the complexity of so many pricing options is somewhat mitigated. Plus it's fun to play with.

The evolution of most startups seems to track really well with Heroku's overall business strategy: as a customer becomes larger and more successful, their increased traffic and database needs will cause them to start paying Heroku. If your venture does not really go anywhere, it is not really taking up much in the way of resources anyhow. This aligns Heroku nicely with the needs of their customers, instead of pitting them against them trying to extract revenues too early in the growth curve.

Despite a few growing pains, they have had pretty decent uptime on my app so far. Even with my new app Thumbfight getting a few sudden traffic bursts, as well as having a major reliance on Twitter for back-end processing (more about Thumbfight in an upcoming post).

Heroku is a work in progress, but so is most everything else on the entire Internet. Heroku provides an amazingly easy and insanely cheap way to jumpstart your Ruby-based web application hosting and deployment, while still getting some real expertise. As long as you can work within their current technical limitations, for a Ruby-powered startup, I think Heroku is a great way to go.

Heroku, Why Haven't I Been Using You Till Now?

Last night, I finally got around to deploying something on Heroku, an interesting service founded by my formerly LA-based Ruby programming chums Adam Wiggins, James Lindenbaum, and Orion Henry. I had played with their previous incarnation of the service, now known as "Heroku Garden" but only recently have I gotten to know a little bit more about the incredible offering they have evolved into.

Basically, the Heroku crew have addressed the question "how can I deploy my Ruby on Rails, Sinatra, or other Rack-based web application into a dynamic cloud of servers with ridiculous ease?" They have done this with an ingenious architecture that takes advantage of Amazon's EC2 to provide their internal infrastructure. This allows Heroku to concentrate on their most important core value proposition, of a simple way to take your Ruby code and just push it into the cloud.

Notice I said "push". Heroku requires that you use git for source control of your application. You are using git for everything now, right? If not, git with it! Sorry, could not resist that. Anyhow, by simply adding a remote master to your existing git repo that points to Heroku, along with a few Ruby gems that they provide, you can deploy your app just by pushing your current branch to the Heroku master.

Doing this, causes your app to get packaged up into "slug". Once you have an active slug, it will be be deployed to a "dyno" within the Heruku grid, which is what a virtual node within their architecture is called. As your app requires more resources, the slug can be deployed to more dynos within "less than 2 seconds for most apps". That is way faster than starting up a new Amazon EC2 instance yourself, and having this extra layer has a number of other interesting benefits as well.

Heroku has a quick start guide, which pretty much runs down what you need to do. I had found a slightly more simplified quickstart here. I already had an existing Sinatra-based app that I wanted to test on Heroku, so here were my steps:

1. Install heroku gem

sudo gem install heroku

2. Setup Heroku account info, and upload public key

heroku keys:add 

This will prompt you for your Heroku account info. If you have not created one yet, better jump over to http://heroku.com/signup and create one

3. Create Heroku app from my existing app
I just changed so my current directory was the app I wanted to add to Heroku, then entered:

heroku create myappname

This creates the new app on Heroku, and creates a remote branch so you can deploy just by pushing the code.

4. Deploy my code

git push heroku master

That's it! If you have a really simple app, with no database access, you are done. What, you are deploying a Ruby on Rails app and need a database setup? OK, then...

5. Run database migrations

heroku rake db:migrate

NOW, you are fully deployed and running on Heroku. Unless you are not. I still had a minor problem with my app. I was writing my log file into "logs/production.log" but Heroku does not normally allow write access to disk. The two exceptions to this are the "tmp" directory and "log" directory (notice singular). They do provide an easy way to view your most recent log entries, by typing

heroku logs

which is how I figured out my problem with the log directory.

So, here is my total time required to deploy this app on Heroku:
- Reading quickstart = 3 minutes
- Installing gem and entering account info = 2 minutes
- Making my app a Heroku app = 1 minute
- Deploying my app for the first time to Heroku = 2 minutes
- Figuring out what I had done wrong from the Heroku documentation = 10 minutes
TOTAL = 18 minutes

Here were my bonus steps:
- Reading Heroku docs on using a custom domain with Heroku = 1 minute
- Realize I need to rename my app using Heroku command line = 1 minute
- Rename my app using Heroku command line = 1 minute
- Setting my DNS settings to point to Heroku = 5 minutes
- Telling Heroku about my custom domain = 1 minute
TOTAL = 9 minutes

So there you have it... a fully deployed app, living in the Heroku grid and consequently the Amazon EC2 cloud, in less than 30 minutes, having never used their tools before, including troubleshooting a minor configuration problem. That may seem unfair... and it is. That is exactly the kind of unfair I like on my side!

Much credit should go to the Heroku team for creating something extremely cool and functional. Important details are still not available, like pricing etc., but at least for now Heroku, is a great way to easily get your app up into the cloud within literally minutes.

What is the future for Heroku? Funded by Y Combinator, they have been quietly working away, and now with Sinatra team leads Blake Mizerany and Ryan Tomayko onboard as well, I think we will be hearing a lot from this exciting little company.