k2glyph / docker-node-mongo

Dockerized webapp running Express and Mongo

Docker Webapp Example

A simple example of using Docker to deploy a web app. The stack used here is Node.js, but these principles could be applied to any stack that runs on a Linux distribution (Ruby, Python, Java, etc).

Running the app

To run this app you need to already have Docker installed. For platform specific instructions see this article: Docker Installation

Once you have docker running, we can start. From this repository:

1. Build and run the MongoDB container:

   sudo docker build -t my/mongodb ./mongodb
   sudo docker run -d --name mongo my/mongodb
   

2. Build and run the web app. Make sure not to forget the --link flag:

   sudo docker build -t my/webapp .
   sudo docker run -d -P --name webapp --link mongo my/webapp
   

3. Find out what port docker has assigned to your app:

   sudo docker port webapp 3000
   

You should see something like 0.0.0.0:32774. Copy that into your browser and check out the app.

Note: If you're running docker through Boot2Docker or Docker Machine you will need to access the port on the IP of the VM running docker. To find this do the following:

Boot2Docker: boot2docker ip

Docker Machine: docker-machine ip dev

For Docker Machine you may need to specify a different VM other than dev depending on what you named your machine when you crated it.