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Ruby container images based on Red Hat Software Collections and intended for OpenShift and general usage, that provide a platform for building and running Ruby applications. Users can choose between Red Hat Enterprise Linux, Fedora, and CentOS based images.

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Ruby container images

Build Status

ruby-26-container status: Docker Repository on Quay

ruby-27-container status: Docker Repository on Quay

This repository contains the source for building various versions of the Ruby application as a reproducible container image using source-to-image. Users can choose between RHEL and CentOS based builder images. The resulting image can be run using podman.

For more information about using these images with OpenShift, please see the official OpenShift Documentation.

Versions

Ruby versions currently provided are:

RHEL versions currently supported are:

  • RHEL7
  • RHEL8

CentOS versions currently supported are:

  • CentOS7

A Ruby 1.9 image can be built from this third party repository. It is not maintained by Red Hat nor is part of the OpenShift project.

Installation

To build a Ruby image, choose either the CentOS or RHEL based image:

  • RHEL based image

    These images are available in the Red Hat Container Catalog. To download it run:

    $ podman pull registry.access.redhat.com/rhscl/ruby-27-rhel7
    

    To build a RHEL based Ruby image, you need to run the build on a properly subscribed RHEL machine.

    $ git clone --recursive https://github.com/sclorg/s2i-ruby-container.git
    $ cd s2i-ruby-container
    $ make build TARGET=rhel7 VERSIONS=2.7
    
  • CentOS based image

    This image is available on DockerHub. To download it run:

    $ podman pull quay.io/centos7/ruby-27-centos7
    

    To build a Ruby image from scratch run:

    $ git clone --recursive https://github.com/sclorg/s2i-ruby-container.git
    $ cd s2i-ruby-container
    $ make build TARGET=centos7 VERSIONS=2.7
    

Note: while the installation steps are calling podman, you can replace any such calls by docker with the same arguments.

Notice: By omitting the VERSIONS parameter, the build/test action will be performed on all provided versions of Ruby.

Usage

For information about usage of Dockerfile for Ruby 2.5, see usage documentation.

For information about usage of Dockerfile for Ruby 2.6, see usage documentation.

For information about usage of Dockerfile for Ruby 2.7, see usage documentation.

Test

This repository also provides a S2I test framework, which launches tests to check functionality of a simple Ruby application built on top of the s2i-ruby image.

Users can choose between testing a Ruby test application based on a RHEL or CentOS image.

  • RHEL based image

    To test a RHEL7-based Ruby image, you need to run the test on a properly subscribed RHEL machine.

    $ cd s2i-ruby-container
    $ make test TARGET=rhel7 VERSIONS=2.7
    
  • CentOS based image

    $ cd s2i-ruby-container
    $ make test TARGET=centos7 VERSIONS=2.7
    

Notice: By omitting the VERSIONS parameter, the build/test action will be performed on all the provided versions of Ruby.

Repository organization

  • <ruby-version>

    Dockerfile and scripts to build container images from.

  • common/

    Folder containing scripts which are responsible for build and test actions performed by the Makefile. It is a github sub-module pointing to https://github.com/sclorg/container-common-scripts.

Image name structure

  1. Platform name (lowercase) - ruby
  2. Platform version(without dots) - 27
  3. Base builder image - centos7/rhel7

Examples: ruby-27-centos7, ruby-27-rhel7

Repository organization

  • <ruby-version>

    • Dockerfile

      CentOS based Dockerfile.

    • Dockerfile.rhel7

      RHEL based Dockerfile. In order to perform build or test actions on this Dockerfile you need to run the action on a properly subscribed RHEL machine.

    • s2i/bin/

      This folder contains scripts that are run by S2I:

      • assemble

        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.)

      • run

        This script is responsible for running the application by using the application web server.

      • usage*

        This script prints the usage of this image.

    • root/

      This folder contains scripts that are put into the container image.

    • test/

      This folder contains a S2I test framework with a simple Rack server.

      • puma-test-app/

        Simple Puma web server used for testing purposes by the S2I test framework.

      • rack-test-app/

        Simple Rack web server used for testing purposes by the S2I test framework.

      • run

        Script that runs the S2I test framework.

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Ruby container images based on Red Hat Software Collections and intended for OpenShift and general usage, that provide a platform for building and running Ruby applications. Users can choose between Red Hat Enterprise Linux, Fedora, and CentOS based images.

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