This implements a simple TODO list microservices using jwt authentication.

The easiest way to install it is to have the latest bleeding edge Docker engine and the latest bleeding edge Docker compose. (We need them because of Docker compose latest features requiring an engine running a v1.22 API. The features enable us automatic host discovery through a docker network, making the whole process easier).

Once you have both, the way to go is :

go get -v github.com/dolanor/microservices
cd $GOPATH/src/github.com/dolanor/microservices
make # It will build each microservice binary and put them in a container
docker-compose up

Then, fire your browser and go to http://localhost:8080 Or alternatively, you could go test -v ./...

I used a Makefile to simplify and fasten the development process. If I used a golang:onbuild base image, every code modification would imply a new go get -v for all the dependencies. With a local build, it's way faster but could add some more dependency bugs. We should add a PROD Dockerfile for that case.

Docker compose helps you putting all the components together. A very nice addition in the context of microservices: scaling.

docker-compose scale auth=3 todo=2 will create 3 containers for authentication services and 2 for todo services.

It makes scaling your services very simple without the need of a full blown orchestration solution for a simple system. One backward is that it is slow (I tried to scale 20 auth, 10 todo and 10 data, and it took a few minutes to scale and more time to launch.