In this session, we learnt about Docker ONBUILD triggers, how these triggers work and how to use them. In addition, we covered basic docker-compose introduction by demonstrating how to a mini microservices application (with 2 nodes). The session run for 30 minutes. the code sample used in the meetup can be found at github.com/Codefresh-Examples/express-angular-mongo For any question please email us at contact@codefresh.io Passionate about Docker technology and want to join our team? give us a shout at joinus@codefresh.io Join our meetup to attend future sessions online @ meetup.com/Containers-101-online-meetup/

1. Containers #101
Building, running & deploying
Docker containers
Oct 2015
Recording available at:
https://vimeo.com/141966112

2. About the meetup
• A series of 30 min webinars + 10 min Q&A
• Hands On
• Session are recorded
• Suggested topics and presenters are
welcome
Recording available at
https://vimeo.com/channels/containers101

3. About me
• Developer, entrepreneur and technology
enthusiast
• Live in the Silicon Valley since 2008
• Founder and CEO of Codefresh
• Member of the Node.js foundation
@RazielTabib

4. About codefresh
• A Docker platform for development
teams.
• Build, Run & Test Docker containers
• New Innovator sponsor of DockerCon
Europe
• We are hiring! email us to
joinus@codefresh.io
@codefresh

5. Terminology
Docker File
A recipe for Docker image
Docker Images
Blueprints of our application
Docker Container
Created from docker images and are real instances of our application
Docker Daemon
Building, running and distributing Docker containers
Docker Client
Run on our local machine and connect to the daemon
Docker Hub
A registry of docker images
https://www.airpair.com/node.js/posts/getting-started-with-docker-for-the-nodejs-dev

6. Previous meetups
• Meetup #2: docker file, docker cache
• Meetup #1: docker search, run & commit, docker hub
Recording available at
https://vimeo.com/channels/containers101

7. What we will see today
• Build a simple micro-service
• Create base Docker image using Docker file w ONBUILD
• Create new image with our micro-service
FROM base-image
….
Dockerfile
micro-service
micro-service
• Intro to docker compose
ubuntu
Node.js
ONBUILD
Base image

8. Docker file ONBUILD command
The ONBUILD instruction adds to the image a trigger instruction
to be executed at a later time, when the image is used as the
base for another build. The trigger will be executed in the context
of the downstream build, as if it had been inserted immediately
after the FROM instruction in the downstream Dockerfile.
https://docs.docker.com/reference/builder/#onbuild

9. FROM base-image
Dockerfile
micro-service
FROM ubuntu:latest
MAINTAINER raziel@codefresh.io
ONBUILD COPY ./package.json src/
ONBUILD RUN npm install
ONBUILD COPY . src/
……..
Dockerfile
Docker file ONBUILD command
ubuntu
Node.js
ONBUILD
base-image
COPY ./package.json src/
RUN npm install
COPY . src/

10. Demo

11. Web:
build: .
ports:
- “9000:9000”
links:
- mongo
mongo:
image: mongo:latest
ports:
- “27017:27017”
docker-compose.yml
Docker compose
Web (nodejs) Mongo
https://github.com/Codefresh-Examples/express-angular-mongo

12. Web:
build: .
ports:
- “9000:9000”
links:
- mongo
mongo:
image: mongo:latest
ports:
- “27017:27017”
docker-compose.yml
Docker compose
Web (nodejs) Mongo
https://github.com/Codefresh-Examples/express-angular-mongo

13. What we saw today
• Build a simple micro-service
ubuntu
Node.js
ONBUILD
micro-service image
• Create base Docker image using Docker file w ONBUILD
• Create new image with our micro-service
FROM base-image
….
Dockerfile
micro-service
micro-service
• Intro to docker compose

14. additional resources
• Codefresh blog blog.codefresh.io
• Containers #101
http://www.meetup.com/Containers-101-online-meetup/
• Docker Online meetup (delivered by Docker)
http://www.meetup.com/Docker-Online-Meetup/
@codefresh

15. Questions?
raziel@codefresh.io
www.codefresh.io
@RazielTabib
Sign up to our beta @ www.codefresh.io
We are hiring
joinus@codefresh.io