/kittens_store

Primary LanguageHCL

Kittens Store

Small Sinatra application that returns information about cats available in the store.

The application is a combination of plain text and JSON endpoints. Currently available endpoints

  • / - hello page
  • /kittens/info - Read count of kittens in database and presents info in readable text

Assignment

Our company developed and released MVP of this application. We envision a great potential for the app and would like to keep building it in a fast and reliable way. In order to present MVP to the stakeholders, we should build and deploy the application on our primary Cloud.

Requirements (Must have)

  • Package application by writing dockerfile(s) and store the image in container registry (e.g DockerHub or AWS ECR)
  • Spin up Kubernetes cluster in the Cloud environment
  • Deploy application dependency resources (e.g. database) in the Cloud or k8s cluster
  • Deploy the application into k8s cluster and show the working state
  • (*) Configure HPA (Horizontal Pod Autoscaler) and demonstrate that application can be scaled under the pressure (e.g. amount of requests/sec or cpu usage)

Requirements (Nice to have)

  • Use AWS as primary Cloud platfrom
  • Use Terraform as a main Infrastructure provisioning tool
  • Use Helm as primary tools for organizing deployment manifests
  • Automation - who likes to perform manual steps?
  • Configuration - how can we adopt a similar solution for other products/flows/technologies?
  • Code - infrastructure/provision as a code works the best to be readable for all engineers, maintain truth and avoid any hidden manual configurations.

As you work on your solution you will inevitably have questions - please send all inquiries via Slack. We are happy to assist and help

Setup and run application

Setup

Need ruby 2.4.9

  • bundle install - install dependency
  • Configure database in config/database.yml or pass configuraton via DATABASE_URL (see section below)
  • bundle exec rake db:create - create db and run migrations
  • bundle exec rake db:migrate - migrate db to latest version
  • bundle exec rake db:seed - seed database with basic data

Run application

  • bundle exec rackup --port 1234 --host 0.0.0.0 - Launch web application on port 1234

Environment variables

  • DATABASE_URL - url to database e.g postgres://{user}:{password}@{hostname}:{port}/{database-name}
  • RACK_ENV - environment for the app. possible values: production, development, test