This is a sample Go application which connects to Redis. The app increments a counter on an incoming request.

• Use make build to compile the binary.
• Set the environment variables:
  • DEMO_APP_ADDR: Address where the app should listen to
  • DEMO_REDIS_ADDR: Address where Redis is running

• Create a Dockerfile for the app.

• Create a docker-compose.yml for the app which includes

  • redis service, with the data directory of redis mounted at /data in your VM.
  • app service running with port 8000 exposed to the host.

• Write a bash script that creates and boots Vagrant box with Ubuntu.

• Using Ansible provision the VM to:

  • Setup hostname of VM as demo-ops
  • Create a user demo
  • Configure sysctl for sane defaults. For eg: increasing open files limit. Configure a variety of sysctl settings to make the VM a production grade one.
  • Set the system's timezone to "Asia/Kolkata"
  • Install Docker and Docker-Compose
  • Configure Docker Daemon to have sane defaults. For eg: to keep logs size in check.
  • Deploy the docker-compose.yml in /etc/demo-ops and start the services

• Commit the scripts to Github and share the link.

If you have experience working with Kubernetes, you can attempt the bonus scenario:

• Create a namespace demo-ops
• Create a deployment and service manifest for the app.
• Configure liveliness check, resource quotas for the deployment.