Ruby Docker image
For RHEL based image
Support for ruby1.9 is being discontinued for rhel7.
For CentOS based image
$ s2i build https://github.com/openshift/sti-ruby.git --context-dir=1.9/test/puma-test-app/ openshift/ruby-19-centos7 ruby-sample-app $ docker run -p 8080:8080 ruby-sample-app
Accessing the application:
$ curl 127.0.0.1:8080
CentOS based Dockerfile.
This folder contains scripts that are run by S2I:
Used to install the sources into the location where the application
will be run and prepare the application for deployment (eg. installing
modules using bundler, etc.)
This script is responsible for running the application by using the
application web server.
This script prints the usage of this image.
This folder contains a file with commonly used modules.
This folder contains a S2I
test framework with a simple Rack server.
To set these environment variables, you can place them as a key value pair into a
file inside your source code repository.
This variable specifies the environment where the Ruby application will be deployed (unless overwritten) -
Each level has different behaviors in terms of logging verbosity, error pages, ruby gem installation, etc.
Note: Application assets will be compiled only if the
RACK_ENVis set to
This variable set to
trueindicates that the asset compilation process will be skipped. Since this only takes place
when the application is run in the
productionenvironment, it should only be used when assets are already compiled.
In order to dynamically pick up changes made in your application source code, you need to make following steps:
For Ruby on Rails applications
Run the built Rails image with the
RAILS_ENV=developmentenvironment variable passed to the Docker
$ docker run -e RAILS_ENV=development -p 8080:8080 rails-app
For other types of Ruby applications (Sinatra, Padrino, etc.)
Your application needs to be built with one of gems that reloads the server every time changes in source code are done inside the running container. Those gems are:
Please note that in order to be able to run your application in development mode, you need to modify the S2I run script, so the web server is launched by the chosen gem, which checks for changes in the source code.
$ docker run -e RACK_ENV=development -p 8080:8080 sinatra-app
To change your source code in running container, use Docker's exec command:
docker exec -it <CONTAINER_ID> /bin/bash
After you Docker exec into the running container, your current
directory is set to
/opt/app-root/src, where the source code is located.