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HelloFresh DevOps Test

Hello and thanks for taking the time to try this out.

The goal of this test is to assert (to some degree) your coding, testing, automation and documentation skills. You're given a simple problem, so you can focus on showcasing your techniques.

Problem definition

The aim of test is to create a simple HTTP service that stores and returns configurations that satisfy certain conditions. Since we love automating things, the service should be automatically deployed to kubernetes.

Note: While we love open source here at HelloFresh, please do not create a public repo with your test in! This challenge is only shared with people interviewing, and for obvious reasons we'd like it to remain this way.

Instructions

  1. Clone this repository.
  2. Create a new dev branch.
  3. Solve the task and commit your code. Commit often, we like to see small commits that build up to the end result of your test, instead of one final commit with all the code.
  4. Do a pull request from the dev branch to the master branch. More on that right below.
  5. Reply to the thread you are having with our HR department so we can start reviewing your code.

In your pull request, make sure to write about your approach in the description. One or more of our engineers will then perform a code review. We will ask questions which we expect you to be able to answer. Code review is an important part of our process; this gives you as well as us a better understanding of what working together might be like.

We believe it will take 4 to 8 hours to develop this task, however, feel free to invest as much time as you want.

Endpoints

Your application MUST conform to the following endpoint structure and return the HTTP status codes appropriate to each operation.

Following are the endpoints that should be implemented:

Name Method URL
List GET /configs
Create POST /configs
Get GET /configs/{name}
Update PUT/PATCH /configs/{name}
Delete DELETE /configs/{name}
Query GET /search?name={config_name}&data.{key}={value}

Query

The query endpoint MUST return all configs that satisfy the query argument.

Schema

  • Config
    • Name (string)
    • Data (key:value pairs)

Configuration

Your application MUST serve the API on the port defined by the environment variable SERVE_PORT. The application MUST fail if the environment variable is not defined.

Deployment

The application MUST be deployable on a kubernetes cluster. Please provide manifest files and a script that deploys the application on a minikube cluster. The application MUST be accessible from outside the minikube cluster.

Rules

  • You can use any language / framework / SDK of your choice.
  • The API MUST return valid JSON and MUST follow the endpoints set out above.
  • You SHOULD write testable code and demonstrate unit testing it.
  • You can use any testing, mocking libraries provided that you state the reasoning and it's simple to install and run.
  • You SHOULD document your code and scripts.