Microservice demo

Just playing with microservices in Golang.

Three containers share the same network. They work together to produce the result.

Generator

Generator can generate some response based on request HTTP POST parameters in JSON format:

• "length" (integer)
• "caps" (boolean)

Building container

docker build -t mikegordo/generator generator/

Starting container

docker run -p 8080:8080 --rm --name generator mikegordo/generator

Testing the app

curl -i -X POST -d "{\"length\":10, \"caps\":false}" localhost:8080

Response example

{
    "Status":true,
    "ErrorCode":200,
    "Value":"idcgkvepqs"
}

Fetcher

Fetches the response from the Generator every FETCHER_FREQ seconds (default 5) and stores it to Redis. Uses environment variables FETCHER_LENGTH (default 16) and FETCHER_CAPS (default false).

Building container

docker build -t mikegordo/fetcher fetcher/

Starting container

First, start Generator, then Redis container.

docker run --name redis --net container:generator --rm redis

Start the app

docker run --rm --name fetcher --net container:generator mikegordo/fetcher

Example with variables

docker run --rm --name fetcher --net container:generator -e FETCHER_LENGTH=8 -e FETCHER_CAPS=true mikegordo/fetcher