1.
Improve your Java development env with
DOCKER
Compose & Machine
Copyright 2015 eXo Platform

2.
About Us
Copyright 2015 eXo Platform
● Maxime Gréau
○ @mgreau
● Software Engineer at eXo
● Thomas Delhoménie
○ @tdelhomenie
● Software Engineer at eXo

3.
Agenda
Copyright 2015 eXo Platform
1. Docker Toolbox
2. Work on multiple technical stacks
3. Uses cases “In A Container”
3.1. Debug
3.2. Code & Deploy
3.3. Deploy from your IDE
3.4. Build & Run with Maven Docker Plugins
3.5. Integration Tests
4. Reproduce production bugs easily
5. Work with an architecture closest to production
6. Do all the things with Docker & co

4.
What’s the
PROBLEM
with my development environment?
Copyright 2015 eXo Platform

5.
Problem 1: Dev environment setup time
Copyright 2015 eXo Platform
Welcome, it’s your first day, you just have to:
● Install Maven 3.2.3
● Install JDK 1.7.0_80
● Install Tomcat 7.0.63
● Install MySQL 5.5, PostgreSQL 9.1
● Read the installation doc…

6.
The BIG installation doc !
Copyright 2015 eXo Platform

7.
And after 1 hour....

8.
Problem 2: Works on my machine
Copyright 2015 eXo Platform

9.
Problem 3: the matrix hell
Copyright 2015 eXo Platform
MySQL 5.1 MySQL 5.5 Mongo 3.0 Java 7 Java 8
My first app v1 X X
My first app v2 X X X X
My other app v1 X X
...

10.
Fix all those problems with 3 commands!
Copyright 2015 eXo Platform
Pre-requisites
docker, machine & compose installed
Then
1. Run git clone https://github.com/my-repo/my.git & cd my-project
2. Run docker-compose up
3. Open your browser

11.
Docker
TOOLBOX
For OSX and Windows
Copyright 2015 eXo Platform

12.
Docker Toolbox includes...
Copyright 2015 eXo Platform
● Docker Machine for running the docker-machine binary
● Docker Engine for running the docker binary
● Docker Compose for running the docker-compose binary
● Kitematic, the Docker GUI
● Oracle VM VirtualBox
Only for OSX
and Windows

13.
Create dev environment
Copyright 2015 eXo Platform
Mac & Windows
> docker-machine create my-machine-name
> eval $(docker-machine env my-machine-name)
Linux
Nothing special to do!

14.
TOURNAMENTS
TENNIS APP
Sample Application
Copyright 2015 eXo Platform

15.
Tennis App - Screenshots
Copyright 2015 eXo Platform
batch-tennis-app.warws-tennis-app.war

16.
WildFly 8.2
WildFly 8.2
JSON-P
1.0
CDI
1.1
WebSocket
API 1.0
JPA
2.1
Batch API
1.0
Tennis App - Architecture - Java EE 7
Copyright 2015 eXo Platform
batch-tennis-app.war
MySQL
ws-tennis-app.war
Browser
CSV

17.
As a Developer you want to
Work on multiple
technical stacks
Copyright 2015 eXo Platform

18.
WildFly 8.2
Multiple apps with docker compose
Copyright 2015 eXo Platform
MySQL 5.7
Maria DB
10.0
batch-tennis-app.war
Apache
Wordpress

19.
DEMO 1
Copyright 2015 eXo Platform
Application 1
> git clone URL1 & cd app1
> mvn package
> docker-compose up
open your browser !
Application 2
> git clone URL2 & cd app2
> docker-compose up
open your browser !

20.
Tennis App Batch - Dockerfile
Copyright 2015 eXo Platform
FROM jboss/wildfly:8.2.1.Final
RUN mkdir -p /opt/jboss/wildfly/standalone/deployments/ROOT.war/
RUN touch /opt/jboss/wildfly/standalone/deployments/ROOT.war.dodeploy
VOLUME ["/opt/jboss/wildfly/standalone/deployments/ROOT.war/"]
ENV MYSQL_CONNECTOR_VERSION 5.1.34
RUN /opt/jboss/wildfly/bin/add-user.sh -up mgmt-users.properties admin Admin#70365 --silent
# Install mysql driver
RUN curl -L -o /opt/jboss/wildfly/standalone/deployments/mysql-connector-java.jar https://repo1.
maven.org/maven2/mysql/mysql-connector-java/${MYSQL_CONNECTOR_VERSION}/mysql-
connector-java-${MYSQL_CONNECTOR_VERSION}.jar
CMD ["/opt/jboss/wildfly/bin/standalone.sh", "-b", "0.0.0.0"]

21.
Tennis App Batch - docker-compose.yml
Copyright 2015 eXo Platform
batch_run:
build: ./docker/dev/run/backend
ports:
- "7777:8080"
volumes:
- ./app/batch/target/batch:/opt/jboss/wildfly/standalone/deployments/ROOT.war/
links:
- db
dbdata:
image: mysql:5.7
volumes:
- /var/lib/mysql
db:
image: mysql:5.7
volumes_from:
- dbdata
environment:
- MYSQL_ROOT_PASSWORD=tennistour
- MYSQL_DATABASE=tennistour
- MYSQL_USER=tennistour
- MYSQL_PASSWORD=tennistour

22.
PHP Application - Dockerfile (Wordpress)
Copyright 2015 eXo Platform
FROM php:5.6-apache
RUN a2enmod rewrite
# install the PHP extensions we need
RUN apt-get update && apt-get install -y libpng12-dev libjpeg-dev && rm -rf /var/lib/apt/lists/*
&& docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr
&& docker-php-ext-install gd
RUN docker-php-ext-install mysqli
VOLUME /var/www/html
ENV WORDPRESS_VERSION 4.3.1
ENV WORDPRESS_SHA1 b2e5652a6d2333cabe7b37459362a3e5b8b66221
# upstream tarballs include ./wordpress/ so this gives us /usr/src/wordpress
RUN curl -o wordpress.tar.gz -SL https://wordpress.org/wordpress-${WORDPRESS_VERSION}.tar.gz
&& echo "$WORDPRESS_SHA1 *wordpress.tar.gz" | sha1sum -c -
&& tar -xzf wordpress.tar.gz -C /usr/src/
&& rm wordpress.tar.gz
&& chown -R www-data:www-data /usr/src/wordpress
COPY docker-entrypoint.sh /entrypoint.sh
# grr, ENTRYPOINT resets CMD now
ENTRYPOINT ["/entrypoint.sh"]
CMD ["apache2-foreground"]

23.
PHP Application - docker-compose.yml
Copyright 2015 eXo Platform
wordpress:
image: wordpress
links:
- db:mysql
ports:
- 8080:80
db:
image: mariadb
environment:
MYSQL_ROOT_PASSWORD: example

24.
Others use cases
Copyright 2015 eXo Platform
eXo use case : multi databases support (matrix compatibility pb)
PostgreSQL
9.3
MySQL 5.6MySQL 5.5 PostgreSQL
9.4
Oracle
11gR2

25.
Others use cases
Copyright 2015 eXo Platform
Migration between 2 versions of the database
my-app
MySQL
5.5
my-app
MySQL
5.7

26.
Copyright 2015 eXo Platform
USE CASES
“In a Container”

27.
As a Developer you want to
Debug Java app in a
container
Copyright 2015 eXo Platform

28.
How to debug in a container ?
Copyright 2015 eXo Platform
WildFly 8.2
MySQL 5.7
batch-tennis-app.war
Remote debug

29.
DEMO 2
Copyright 2015 eXo Platform

30.
As a Developer you want to
Code and deploy
Copyright 2015 eXo Platform

31.
How to deploy a new war ?
Copyright 2015 eXo Platform
● Update your code in your favorite IDE
● Build with maven
● Open your browser !

32.
DEMO 3
Copyright 2015 eXo Platform

33.
As a Developer you want to
Use your IDE to deploy
in a container
Copyright 2015 eXo Platform

34.
IDE starts to support Docker container technology
Copyright 2015 eXo Platform
● Eclipse Mars (2015)
● Netbeans
● IntelliJ IDEA v14.1

35.
As a Developer you want to
Build & Run with
Maven Docker plugins
Copyright 2015 eXo Platform

36.
Docker Maven plugins
Copyright 2015 eXo Platform
mvn tomcat:run
https://github.com/rhuss/docker-maven-plugin
mvn docker:start

37.
As a Developer you want to
Execute Integration
Tests in containers
Copyright 2015 eXo Platform

38.
Arquillian - Intro
Copyright 2015 eXo Platform
● Automated tests without mocks
● Compatible JUnit/TestNG
● Application Server agnostic
● Embedded/Managed/Client modes

39.
Arquillian Cube
Copyright 2015 eXo Platform
http://arquillian.org/modules/cube-extension/
Shameless auto-promotion :
http://mgreau.com/posts/2015/03/03/docker-
asciidoctorj-wildfly-arquillian.html

40.
As a Developer you want to
Easily reproduce
production bugs
Copyright 2015 eXo Platform

41.
Test with the production version of the “old” stack
Copyright 2015 eXo Platform
my-app
MySQL 5.5
my-app
MySQL 5.7
> git checkout v1
> “build”
> docker-compose up
New dev stackProd stack
5.5 5.7
v1 v2

42.
As a Developer you want to
Work with an architecture
close to production
Copyright 2015 eXo Platform

43.
Angular / Java EE 7 Application
Copyright 2015 eXo Platform
Apache
HTTPD
UI
Angular
Load
Balancer
WildFly 8.2
WildFly 8.2
batch-tennis-app.war
MySQL
ws-tennis-app.war
Cache
Redis
CSV
WildFly 8.2
ws-tennis-app.war
WildFly 8.2
ws-tennis-app.war

44.
DEMO 4
Copyright 2015 eXo Platform

45.
DO ALL THE THINGS
WITH DOCKER
Copyright 2015 eXo Platform

46.
Build your projects with docker
Copyright 2015 eXo Platform
You will only need docker tools
on your laptop!

47.
DEMO 5
Copyright 2015 eXo Platform

48.
Docker
TOOLS
Copyright 2015 eXo Platform

49.
GUI for Docker
Copyright 2015 eXo Platform
● Kitematic
● DockerUI

50.
Docker
BEST PRACTICES
Copyright 2015 eXo Platform

51.
Some best practices for development
Copyright 2015 eXo Platform
● Use Docker Machine to organize your images and limit resources usage
(CPU, memory, …)
● Use volume containers to keep your data safe (schema)
● Useful docker commands:
○ stopped docker containers : docker stop $(docker ps -q)
○ remove dangling docker images:
■ docker rmi $(docker images -q -f "dangling=true")
○ and more: https://github.com/javaee-samples/docker-
java/blob/master/chapters/docker-commands.adoc

52.
Copyright 2015 eXo Platform
Docker doesn’t invent
the container technology,
BUT
make it possible to use it
easily on your laptop!

53.
Improve your Java development env with
Docker Compose & Machine
Thanks
@tdelhomenie @mgreau
Code: http://github.com/mgreau/docker4dev-tennistour-app