This is the Git repo of the Docker official image for [rails] (https://registry.hub.docker.com/_/rails/) and mysql. See these page for the full readme on how to use this Docker image and for information regarding contributing and issues.
First install docker, docker compose for your machine and start it. How this is done is very well documented all over the internet.
You need generate the Rails skeleton app using docker-compose run:
$ docker-compose run app rails new . --force --database=mysql --skip-bundle
Compose will build the image for the web service using the Dockerfile. Then it’ll run rails new inside a new container, using that image. Once it’s done, you should have generated a fresh app:
$ ls -l
total 56
-rw-r--r-- 1 user staff 488 Nov 22 22:02 Dockerfile
-rw-r--r-- 1 user staff 1521 Nov 22 01:36 Gemfile
-rw-r--r-- 1 user staff 4006 Nov 22 01:36 Gemfile.lock
-rw-r--r-- 1 user staff 478 Nov 22 01:17 README.rdoc
-rw-r--r-- 1 user staff 249 Nov 22 01:17 Rakefile
drwxr-xr-x 8 user staff 272 Nov 22 01:36 app
drwxr-xr-x 7 user staff 238 Nov 22 01:36 bin
drwxr-xr-x 11 user staff 374 Nov 22 10:38 config
-rw-r--r-- 1 user staff 153 Nov 22 01:17 config.ru
drwxr-xr-x 5 user staff 170 Nov 22 10:46 db
-rw-r--r-- 1 user staff 420 Nov 22 22:02 docker-compose.yml
drwxr-xr-x 4 user staff 136 Nov 22 01:36 lib
drwxr-xr-x 4 user staff 136 Nov 22 01:39 log
drwxr-xr-x 7 user staff 238 Nov 22 01:36 public
drwxr-xr-x 9 user staff 306 Nov 22 01:27 test
drwxr-xr-x 6 user staff 204 Nov 22 01:39 tmp
drwxr-xr-x 3 user staff 102 Nov 22 01:36 vendor
Now that you’ve got rails app, you need to build the image again.
docker-compose build
The app is now bootable, but you’re not quite there yet. By default, Rails expects a database to be running on localhost - so you need to point it at the mysql container instead. You also need to change the database and username to align with the defaults set by the mysql image.
Replace the contents of config/database.yml with the following:
default: &default
adapter: mysql2
encoding: utf8
pool: 5
username: root
password: "root"
host: mysql
development:
<<: *default
database: dev
test:
<<: *default
database: dev
You can now boot the app with:
docker-compose up -d
Finally, you need to create the database. In another terminal, run:
docker-compose run app rake db:create
That’s it. Your app should now be running on port 3000 on your Docker daemon. If you’re using Docker Machine, then docker-machine ip MACHINE_VM returns the Docker host IP address.
$ docker-machine ip default
192.168.99.100
To stop container then run following command:
$ docker-compose stop
Stopping ror_app_1 ... done
Stopping ror_mysql_1 ... done
To start container again then run following command:
$ docker-compose start
Starting dbdata ... done
Starting appdata ... done
Starting mysql ... done
Starting app ... done