OpenShift

Intro

OpenShift is a PaaS (Platform aas) that lets you easily manage containers, using both Docker and Kubernetes.

Openshift-Origin is the open source upstream of OpenShift (like Fedora is to RHEL).

Redhat Atomic is the Enterprise release of Red Hat that is configured for containers. CentOS Atomic is the open source version. HOWEVER it seems that the base CentOS will work just fine. So let's skip this layer since it doesn't seem necessary.

So to get our open source PaaS, we install CentOS, then install Openshift-Origin on it. I think.

Quick Start

For a quick rampup, you can install a minishift cluster on VirtualBox. Minishift puts everything in one simplified package.

Download the minishift command for your OS, put it in your path
Ensure that VirutalBox is installed on that same OS
Bootstrap it:

$ minishift start --vm-driver=virtualbox
-- Checking if VirtualBox is installed ... OK
-- Downloading OpenShift binary 'oc' version 'v3.7.1'
-- Starting local OpenShift cluster using 'virtualbox' hypervisor ...
-- Minishift VM will be configured with ...
   Memory:    2 GB
   vCPUs :    2
   Disk size: 20 GB
Downloading ISO 'https://github.com/minishift/minishift-b2d-iso/releases/download/v1.2.0/minishift-b2d.iso'
Pulling image openshift/origin:v3.7.1
OpenShift server started.
The server is accessible via web console at:
    https://192.168.99.100:8443
You are logged in as:
    User:     developer
    Password: <any value>
To login as administrator:
    oc login -u system:admin