Composing Docker Compose Applications

Vlad Stirbu

Docker Meetup Tampere

27.04.2017

whoami

Vlad Știrbu

Principal Software Engineer

Nokia Technologies, Digital Health

vlad.stirbu@nokia.com

@VladStirbu

github.com/vstirbu

Content

Target environment overview

Development to production

How to compose apps

Medical grade IoT system...

...and the decomposition

Buzzwords

Microservices

Containers

Microservice basic artefacts

Flat deployment

Docker compose...

version: '2'
services:
  web:
    build: .
    ports:
     - "5000:5000"
    volumes:
     - .:/code
    depends_on:
     - redis

  redis:
    image: "redis:alpine"

µservice with dependencies

Structured deployment view

Compose aggregation

version: '2'
services:
  data-aquisition:
    depends_on:
     - authentication
     - kafka


  kafka:
    image: "kafka"

version: '2'
services:
  authentication:
    depends_on:
     - database

  database:
    image: "database"

COMPOSE_FILE=data-aquisition.yml:authentication.yml

Sharing compose files?

Yeoman

Yeoman is a generic scaffolding system allowing the creation of any kind of app.

Yeoman is language agnostic. It can generate projects in any language

Yeoman by itself doesn't make any decisions. Every decision is made by generators which are basically plugins in the Yeoman environment.

...with a yeoman generator

Workflow

npm install -g yo

yo {microservice-generator}

docker-compose build

docker-compose up