Exercises

We've covered a lot of material in this chapter. To make well-remembered, we recommend two exercises.

1. Run CouchDB as a Docker container and publish its port:

Note

You can use the docker search command to find the CouchDB image.

• • Run the container
  • Publish the CouchDB port
  • Open the browser and check that CouchDB is available

2. Create a Docker image with the REST service replying Hello World! to localhost:8080/hello. Use any language and framework you prefer:

Note

The easiest way to create a REST service is to use Python with the Flask framework, http://flask.pocoo.org/. Note that a lot of web frameworks start the application on the localhost interface only by default. In order to publish a port, it's necessary to start it on all interfaces (app.run(host='0.0.0.0') in the case of a Flask framework).

• • Create a web service application
  • Create a Dockerfile to install dependencies and libraries
  • Build the image
  • Run the container publishing the port
  • Check if it's running correctly using the browser