Configuring environment variables in Marathon
Environment variables play a vital role in any container. Be it your database or messaging server or your own RESTful API, environment variables can be used to store configurations of your container. So far in our geolocation microservice, we haven't come across a scenario to use environment variables as it is a standalone application and does not have to talk to any other server or middleware. But in production scenario where you microservice has to talk to a database or Kafka broker, you have to store the configurations of your database or broker somewhere. That's where developers prefer using environment variables. In this recipe we will take a look at how to configure our geolocation application to use an environment variable and also see how to pass that variable using Marathon.
Getting ready
Before we move on, we first need to know the environment variable that we are going to parameterize and how the geolocation application is going to use...
