Docker-compose for local testing of our cloud infrastructure

Hendrik Mittrop & Lena Brüder

Topics today

What is docker-compose?
Example services: Santa is on the way!
Dockerizing the services
Docker-compose: Simple version
Docker-compose: Enhanced version with routing

What is docker-compose?

multi-container docker applications
defined through YAML files

version: '2'
services:
  web:
    build: .
    ports:
    - "5000:5000"
    volumes:
    - .:/code
    - logvolume01:/var/log
    links:
    - postgres
  postgres:
    image: postgres:latest
    expose:
    - "5432"
volumes:
  logvolume01: {}

Example services: Santa is on the way!

and backend services

Present-service: Generate presents!

Customer-service: Generate customers!

Parcel-service: Store parcels and deliver them!

{
  "recipient": {
    "address": {
      "street": "Entenhausener Straße",
      "house_number": "313",
      "city": "Entenhausen",
      "zip_code": "12345"
    },
    "last_name": "Duck",
    "first_name": "Donald"
  },
  "sender": {
    "address": {
      "street": "Geldspeicherstraße 12",
      "house_number": "543",
      "city": "Entenhausen",
      "zip_code": "12346"
    },
    "last_name": "Daisy",
    "first_name": "Duck"
  },
  "content": {
    "type": "text",
    "content": "a whining dicey ravioli"
  }
}

Frontend-service: Controller for all the things

Dockerizing the services

Present-service

FROM node:latest

# Create app directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

# Install app dependencies
COPY package.json /usr/src/app/
RUN npm install --only=production

# Bundle app source
COPY . /usr/src/app

EXPOSE 3000
CMD [ "npm", "start" ]

Customer-service

FROM node:latest

# Create app directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

# Install app dependencies
COPY package.json /usr/src/app/
RUN npm install --only=production

# Bundle app source
COPY . /usr/src/app

EXPOSE 3000
CMD [ "npm", "start" ]

Frontend-service

FROM node:latest

# Create app directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

# Install app dependencies
COPY package.json /usr/src/app/
RUN npm install

# Bundle app source
COPY . /usr/src/app

ENV app_mode prod

EXPOSE 8080
CMD [ "npm", "run", "start-prod" ]

Parcel-service

Using sbt-native-packager:

import com.typesafe.sbt.packager.docker.Cmd

// exposing the play ports
dockerExposedPorts in Docker := Seq(9000, 9443)

dockerBaseImage := "java:latest"

dockerExposedVolumes in Docker := Seq("/opt/docker/logs")

defaultLinuxInstallLocation in Docker := "/opt/docker"

// fix "no Permission in /opt/docker/PID"-error
javaOptions in Universal ++= Seq(
  "-Dpidfile.path=/tmp/play.pid"
)

Docker-compose: Simple version

show in editor

version: '2'
services:

  parcel-service:
    image: parcel-service:1.0-SNAPSHOT
    environment:
      APP_ENVIRONMENT: integration
    expose:
      - "9000"
  present-service:
    image: present-service:latest
    environment:
      APP_ENVIRONMENT: integration
    expose:
      - "3000"
  customer-service:
    image: customer-service:latest
    environment:
      APP_ENVIRONMENT: integration
    expose:
      - "3000"
  controller:
    image: frontend-service:latest
    environment:
      APP_ENVIRONMENT: integration
    expose:
      - "8080"
    depends_on:
    - parcel-service
    - present-service
    - customer-service
    ports:
    - 8080:8080

Demo

Docker-compose: Enhanced version with routing

show in editor

version: '2'
services:

  parcel-service:
    image: parcel-service:1.0-SNAPSHOT
    environment:
      APP_ENVIRONMENT: integration
      VIRTUAL_HOST: parcel-service
      VIRTUAL_PORT: 9000
    depends_on:
      - proxy
    expose:
      - "9000"


  present-service:
    image: present-service:latest
    environment:
      VIRTUAL_HOST: present-service
      VIRTUAL_PORT: 3000
    depends_on:
      - proxy
    expose:
      - "3000"


  customer-service:
    image: customer-service:latest
    environment:
      VIRTUAL_HOST: customer-service
      VIRTUAL_PORT: 3000
    depends_on:
      - proxy
    expose:
      - "3000"


  frontend-service:
    image: frontend-service:latest
    environment:
      VIRTUAL_HOST: frontend-service
      VIRTUAL_PORT: 8080
    expose:
      - "8080"
    depends_on:
      - parcel-service
      - present-service
      - customer-service
      - proxy
    links:
      - proxy:parcel-service
      - proxy:present-service
      - proxy:customer-service
    ports:
      - 8080:8080


  proxy:
    image: jwilder/nginx-proxy
    environment:
      DEFAULT_HOST: frontend-service
    expose:
      - "80"
    ports:
      - 80:80
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro

Demo

SSL Termination with Nginx proxy

frontend-service:
    image: frontend-service:latest
    environment:
      VIRTUAL_HOST: frontend-service
      CERT_NAME: server
      VIRTUAL_PORT: 9443
      VIRTUAL_PROTO: https
      KEYSTORE_PASSWORD: suchsecret
      KEYSTORE_PATH: /opt/docker/conf/manysecrets.keystore
      HTTPS_PORT: 8443
    volumes:
      - ./cacerts:/etc/ssl/certs/java/cacerts:ro
    expose:
      - "8443"
    depends_on:
      - parcel-service
      - proxy
    links:
      - proxy:parcel-service

Questions?

Slides and code can be found here: https://github.com/lenalebt/docker-compose-meetup image::code.png[width="300"]