One of our development teams needs a new HTTP service - MicroCounter. It has to expose an HTTP endpoint to read and increment a counter and may be used in many different services. It should be a small and independend service. Perfect task for You - our DevOps. Let's do a PoC using Redis!

After discussion we came up with the following interface of our MicroCounter:

There are two HTTP endpoints:

• GET /counter that returns current value of the counter
• POST /counter that increments value of our counter by number given as incrBy POST parameter

We believe in TDD at Allegro and we can't live without it, even at infrasctructure level. And for this challenge we made it easier for You ;) See test.sh file. It does 3 things:

• runs start_env.sh - script that needs to start all services (including Redis and MicroCounter service) running on localhost interface
• runs a series of tests including getting and incrementing value of our counter
• runs stop_env.sh - script that needs to cleanup everything done in previous steps

Implement start_env.sh that will run on any Linux and MacOSX and will run Redis and MicroCounter bound to localhost ports 6379 and 8080.

There is no MicroCounter so You need to create it too. It needs to expose two HTTP methods described above.

Implement stop_env.sh that will cleanup everything done in start_env.sh.

Submit a pull request with your solution!

You can use any tool that can be found on Hacker News :)