OpenShift Commons

Image Builders

Special Interest Group

Wednesday, May 4th, 2016

# Welcome!

Purpose: Discuss, develop and disseminate best practices for building and maintaining redistributable Images for use in OpenShift and Kubernetes environments

Agenda

Welcome ☑
Existing Best Practices
Source to Image (s2i)
Runtime Standardization using Builder Images
NodeJS Builder Demos
Follow up / Get involved!

### Existing # Best Practices

Project Atomic Guidelines

Current content: Guidance for Docker Image Authors

New content: Container Best Practices

OpenShift Guidelines

OpenShift Guidelines for Image Authors

Existing content is written for...

Operators / Administrators / People who have Root

#### Image Standardization ## As a Service > "if only there were a way to codify these requirements and ensure that they can be consistently applied throughout my environments..."

Source

Image

Combines source repos and operationally-maintained builder images to produce application images

Available as a standalone project, for use with Jenkins or other external build processes: github.com/openshift/source-to-image

Building

Builders

OpenShift S2I Guidelines: docs.openshift.org/latest/creating_images/s2i.html

## Standardize with # S2I Offer easy development workflows that automatically codify your operational standards with no added hastle for devs Blog Post: [How to Create an S2I Builder Image](https://blog.openshift.com/create-s2i-builder-image/)

My image standardization use-case:

New NodeJS Runtimes

Extend the existing openshift/base-centos7 image, adding node runtimes from nodejs.org:

github.com/ryanj/origin-s2i-nodejs

Attempt to maintain established conventions from the official SCL-based image builder sources:

github.com/openshift/s2i-nodejs

# Demos

# S2I Usage [This example](https://github.com/ryanj/origin-s2i-nodejs#builds) will produce a new docker image named `pillarjs`: s2i build https://github.com/ryanj/pillar-base ryanj/centos7-s2i-nodejs:current pillarjs

oc new-app

Developers can use "oc new-app" to combine NodeJS repo sources with operationally-maintained base images:

oc new-app ryanj/centos7-s2i-nodejs~https://github.com/ryanj/http-base

The oc command line tool is available on github

You can follow along with the OpenShift Origin Dev VM

OpenShift Templates

Install a template into the current project, making these images (and all relevant tags) easier to reuse:

oc create -f https://raw.githubusercontent.com/ryanj/origin-s2i-nodejs/master/image-streams.json

Administrators can make these images available system-wide by adding them to the openshift namespace:

oc create -n openshift -f https://raw.githubusercontent.com/ryanj/origin-s2i-nodejs/master/image-streams.json

You can help:

Promote best practices for image production and distribution
Standardize workflows for dev and ops
Improve container security
Grow the container ecosystem

# Questions?

Get Involved!

Sign up for the Image Builders SIG mailing list
Openshift Commons and Commons Briefings
Blog Post: How to Create an S2I Builder Image
@ryanj's NodeJS S2I Builder Image sources:
github.com/ryanj/origin-s2i-nodejs
These slides: bit.ly/IB-SIG-kickoff

Join us on May 18th for the next Image Builder SIG meeting,
where Cristian Roldan from Produban will be presenting on:
CI/CD Workflows for Image Building