This document discusses using Docker and docker-compose to run Rails applications. It covers pulling Ubuntu and Nginx Docker images, creating a custom Nginx image, and using docker-compose to run a Rails app with linked MySQL database containers. Key aspects covered include the Dockerfile for building a Rails image, configuring docker-compose.yml to link services, and running the app in detached mode with docker-compose up -d.

1. Docker 2
docker-compose, Dockerfile
himrock922

2. •
• Rails Docker ?
• docker-compose
• Rails docker-compose
• Dockerfile
• Rails

3. Docker ( )
• Docker
• : OS
OS
OS
Bin/Libs
Apps
OS
Bin/Libs
Apps
OS
Bin/Libs
Apps
VM
OS
Docker Engine
Bin/Libs
Apps
Bin/Libs
Apps
Bin/Libs
Apps

4. Ubuntu !
( )
• DockerHub Ubuntu image
• https://hub.docker.com/_/ubuntu/
• URL
• https://asciinema.org/a/BYUZHPhhxzMxDTu4TZeSLNBHX
docker pull ubuntu:latest ( Ubuntu )
docker images( )
docker run –name ubuntu ubuntu:latest /bin/bash (ubuntu
ubuntu:latest image ) ( bash)

5. Nginx ( )
• OK
• https://asciinema.org/a/srqlz31e1xZjkgU4pKwehzUD4
• http://127.0.0.1/
systemctl restart nginx
Failed to connect to bus: No such file or directory
(
)
supervisord
docker commit ubuntu nginx:ver1.0 (nginx:ver1.0 Docker image )
docker run –name nginx -p 80:80 –d nginx:ver1.0 /usr/bin/supervisord( 80
supervisord )

6. Rails Docker ?
• ( )
• Ruby
• MySQL, PostgreSQL DB
• DockerHub image
• https://hub.docker.com/_/ruby/
• https://hub.docker.com/_/mysql/
• Linux OS image Rails

7. docker-compose
• Docker
• Docker …
• !
• !
• Rails DB !
•
•
• docker-compose

8. Rails docker-compose
• https://docs.docker.com/compose/rails/
version: '3’
services:
db:
image: mysql:5.7
command: mysqld
ports:
- 3306:3306
web:
build: .
command: bundle exec rails s -p 3000 -b '0.0.0.0’
ports: - "3000:3000”
links:
- db
web db
2
web db

9. Dockerfile
• CLI
• Dockerfile
• Rails ?
• Ruby Rails ( deprecated)
• Ruby Rails

10. Rails docker-compose
• URL:
https://asciinema.org/a/tJqKGz8MKqHIB5TCpbtMrNecH
•
• docker-compose build
• docker-compose up –d
• docker-compose DB
• Dockerfile ruby Rails

11. Dockerfile docker-compose
•
• Dockerfile docker-compose
•
•
• Dockerfile
• http://docs.docker.jp/engine/articles/dockerfile_best-practice.html

12. • https://docs.docker.com/compose/
• https://docs.docker.com/engine/reference/builder/