Developing and Testing Microservices with Docker

Want to learn how to build this project?

Check out the blog post.

Want to use this project?

Setup

1. Fork/Clone this repo

2. Download Docker (if necessary)

3. Make sure you are using a Docker version >= 17:

   $ docker -v
   Docker version 17.03.0-ce, build 60ccb22
   

Build and Run the App

Set the Environment variables

$ export NODE_ENV=development

Register with the OpenWeatherMap API, and add the key as an environment variable:

$ export OPENWEATHERMAP_API_KEY=YOUR_KEY_HERE

Fire up the Containers

Build the images:

$ docker-compose build

Run the containers:

$ docker-compose up -d

Migrate and Seed

With the apps up, run:

$ sh migrate.sh

Sanity Check

Test out the following services...

(1) Users - http://localhost:3000

(2) Locations - http://localhost:3001

(3) Web - http://localhost:3003

(4) Locations Database and (5) Users Database

To access, get the container id from docker ps and then open psql:

$ docker exec -ti <container-id> psql -U postgres

(6) Functional Tests

With the app running, update the NODE_ENV environment variable and then run the tests:

$ export NODE_ENV=test
$ docker-compose up -d
$ docker-compose run tests npm test

Update NODE_ENV when you're ready to develop again:

$ export NODE_ENV=development
$ docker-compose up -d

Commands

To stop the containers:

$ docker-compose stop

To bring down the containers:

$ docker-compose down

Want to force a build?

$ docker-compose build --no-cache

Remove images:

$ docker rmi $(docker images -q)

Run unit and integration tests:

$ export NODE_ENV=test
$ docker-compose up -d
$ docker-compose run users-service npm test
$ docker-compose run locations-service npm test