openshift

Getting Started With RedHat Container Development Kit

June 16, 2016

The RedHat Container Developer Kit allows you to deploy OpenShift on your laptop for easier testing and development. Here is how to deploy it. Register as a RedHat Developer Obtain a RH login Place credentials in ~/.vagrant.d/Vagrantfile to enable updates for VMs by automatically registering with RedHat Subscription Manager Vagrant.configure('2') do |config| config.registration.username = '<your Red Hat username>' config.registration.password = '<your Red Hat password>' end Mac OS X Prereqs Install pre-reqs:

Upgrading OpenShift Enterprise from 3.1 to 3.2

May 17, 2016

Upgrading from OSE 3.1 to 3.2 using the playbook went quite well for me, but there were a few issues to sort out. The issues were related to: ip failover had to be updated manually there was about 5 minutes downtime during the upgrade updates to image streams docker error messages updated policy and role bindings build strategy Source is not allowed hawkular metrics Upgrade Process Following the directions is pretty straight forward.

Changing the SSL Certificate for OpenShift Console

March 24, 2016

OpenShift has an internal CA for generating certificates to authenticate intra-cluster communication, but your browser doesn’t trust this CA. Perhaps you want to fix that without mucking with the internal SSL communication? I did. Here is how. This OpenShift doc explains how to do this, but it isn’t very clear, to me at least. Overview An outline of the steps: Only make changes to the public URLs and not any internal URLs.

OpenShift High Availability - Routing

March 1, 2016

Highly availabile containers in OpenShift are baked into the cake thanks to replication controllers and service load balancing, but there are plenty of other single points of failure. Here is how to eliminate many of those. Single Points of Failure The components of OpenShift include: Master controller manager server and API endpoint Etcd configuration and state storage Docker Registry Router haproxy This post is mostly about adding high availability to the routing layer.

Ansible Playbook to Prepare for OpenShift Enterprise 3.1

December 12, 2015

This playbook is written for RHEL 7.2 and OSE v3.1. It will perform the following steps which should take place before running the openshift-ansible byo playbook. Install prerequisite RPMs like docker, python, etc. Persist the systemd journal for easier debugging Setup docker ephemeral storage on 2nd disk Turn off swap Enable use of NFS in selinux Prerequisites See my Testing OpenShift Enterprise V3 post for the prereqs. The Playbook The lastest version is available here.

Testing OpenShift Enterprise V3

July 28, 2015

So much for testing OpenShift Origin with Vagrant on OS X, because it does not work yet. Let’s evaluate OpenShift Enterprise v3 on RHEL! First go get yourself an eval license. The OpenShift VMs will run RHEL7.1 and ride on top of RHEV. Documentation First off, here are some starting points to get oriented and acquainted with OpenShift. Docs Getting Started Docs Overview Training Download Prerequisites OpenShift Enterprise 3 Architecture Guide - planning, deployment and operation of an Open Source Platform as a Service Load Balancing Videos

Testing Openshift Origin V3 with Ansible and Vagrant on OS X

June 28, 2015

The OpenShift Origin project provides Ansible playbooks and roles for installing OpenShift on various infratructure. I’m going to try out the example using Vagrant and VirtualBox on my Mac. I’m not very familiar with Vagrant or OpenShift v3 yet, so I’m just going to think out loud and see how it goes. I’ve also recently started testing OpenShift Enterprise. Some Background OpenShift Origin is an opensource PaaS (platform as a service).

Openshift V2 and Flask with Virtualenv on OS X

November 22, 2014

Create a flask app for Openshift with a matching local python virtualenv to perform local testing. In this case we’ll use Python 2.7 on Mac OS X 10.9. Overview of the steps Install Homebrew Install Python Development Environment on Mac OS X Install rhc client tools. Install and Configure a Python Flask for OpenShift Installing Homebrew Ready the system for Homebrew First unhide ~/Library folder. Open Finder Press shift-command-H Press command-J Check Show Library Folder Now Setup shell environment Some of these settings are only relevant to later steps, but go ahead and put them all in now.