Habitat Sample Node App

This simple Express app is an example of how to package a Node.js application with Habitat. It's intended to accompany the walkthroughs on the Habitat website, but it can also be run locally on its own.

Follow the Demos!

For the full experience, we recommend following the demos on the Habitat website. They walk you through getting set up with Habitat, Builder, automated builds and publishing to Docker Hub.

Alternatively, you can follow the instructions below if you simply want to build and run the app locally.

Prerequisites

To package and run this application with Habitat, you'll need to:

• Install and configure Habitat

• Install Docker (if you're on Mac or Windows)

• Clone this repository:

  $ git clone https://github.com/habitat-sh/sample-node-app.git
  $ cd sample-node-app
  

Setup for First-time Users

Before you can build the app, you'll need to create an origin and accompanying keys. The quickest way to do this is by running hab setup as described in the Habitat docs and following the prompts:

$ hab setup

Note: The origin name you use during setup will need to be specified in the plan.sh file mentioned in the next section.

Building the Package

From the habitat directory in this repository, open the plan.sh file. It should look like this:

pkg_origin=your_origin
pkg_name=sample-node-app
pkg_version="1.1.0"
pkg_deps=(core/node)
...

First, change the value of pkg_origin from your_origin to the origin you created in the previous section. If you're following the demo, use the origin you created in Habitat Builder.

Next, let's change the version number:

...
pkg_version="1.1.1"
...

Save and close the file, then enter the Habitat Studio:

$ hab studio enter

And run a build:

[1][default:/src:0]# build

Habitat will produce a package (a .hart file) and place it in the results directory.

Running the Package with Docker

Still in the Studio, right after the build, export that package as a Docker image:

[2][default:/src:0]# source results/last_build.env
[3][default:/src:0]# hab pkg export docker results/$pkg_artifact

Then exit the Studio:

[4][default:/src:0]# exit

And start a Docker container with your newly created image:

$ docker run -it -p 8000:8000 <YOUR_ORIGIN>/sample-node-app

Now head to http://localhost:8000 and see your running app!