Docker compose workshop

1. DOCKER
COMPOSE
An introduction
Matthias Noback
@matthiasnoback
info@matthiasnoback.nl

2. DOCKER ENGINE
Low-level docker commands
docker network create website || true
docker build -t my_webserver -f docker/webserver/Dockerfile ./
docker pull redis:3.2
docker run -d --name redis redis:3.2
docker run
-p 80:80
-v `pwd`/web:/var/www/html
-d
--link redis
--name webserver
my_webserver

3. DOCKER COMPOSE
Configuring and running multiple containers
docker-compose CLI tool
Yaml configuration file(s)

4. CONTAINERS ~= SERVICES
CLI arguments for docker end up in docker-compose.yml
version: '3'
services:
name_of_service:
image: ...
volumes:
- ...

5. BUILDING
IMAGES
Dockerfile and build context

6. BUILD CONTEXT
Short syntax
version: '3'
services:
name_of_service:
build: directory/

7. BUILD CONTEXT
Long syntax
version: '3'
services:
name_of_service:
build:
context: ./
dockerfile: directory/Dockerfile

8. USING
READY-MADE
IMAGES

9. SUPPLY AN IMAGE (AND TAG)
Instead of a build configuration
version: '3'
services:
name_of_service:
image: php:7.1-apache

10. DEPLOYMENT
With Compose

11. some-other-machine
DOCKER
A daemon and a client
Docker
daemon
client
container container container

12. ASSIGNMENTS/
ALL.MD
Playing with docker-compose and docker-compose.yml files
https://github.com/matthiasnoback/docker-compose-workshop/

13. BETTER OPTIONS?
Docker Swarm
Multiple nodes
Fine-grained deploy strategies