OpenShift 4 on OpenStack Networking and Installation

OpenShift Containter Platform 4 is much more like Tectonic than OpenShift 3. Particularly when it comes to installation and node management. Rather then building machines and running an Ansible playbook to configure them you now have the option of setting a fewer paramters in an install config running an installer to build and configure the cluster from scratch.

I would like to illustrate how the basics of the networking might look when installing OpenShift on OpenStack. I also wanted an excuse to try out a new iPad sketch app. These notes are based on recent 4.4 nightly builds on OSP 13 Queens.

Continue reading

Ansible Playbook to Prepare for OpenShift Enterprise 3.1

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.

Continue reading