Using the ISO image method, you are supposed to boot the virtual machines using the rhcos-4.1.0-x86_64-installer.iso CD-ROM image. I find the PXE boot option to take a bit more effort to configure and hence went with the ISO image method. You can either provision OpenShift nodes by booting from an ISO image or you can leverage the PXE boot. There are two provisioning methods available to choose from. The OpenShift installation process assumes installation on empty virtual machines with no operating system pre-installed. We are going to deal with the HTTP server first.

Using two Libvirt networks allowed me to meet the OpenShift DNS requirements and I will elaborate on this design later on in this post.Īfter reviewing the big picture, let’s roll up our sleeves and get to work.

Note that the virtual machines are deployed across two Libvirt networks: openshift-dns and openshift-cluster. Used one-time to initialize the OpenShift cluster. Facilitates bootstrapping, balances the load between the master nodes and also between the ingress router pods. I outlined the purpose of the virtual machines for you in the following table: VM NameĬustom Dnsmasq DNS server used by the load balancer, bootstrap node and OpenShift nodes. The remaining boxes in the diagram are virtual machines. In the diagram, you can see that there is an HTTP server and an oc client installed directly on the host machine. In addition to the OpenShift cluster nodes, the diagram also depicts supplementary pieces of the user-provisioned infrastructure that you will need to deploy: Deployment overviewįirst, let’s take a look at the diagram showing the deployment of the OpenShift cluster on Libvirt/KVM. After you make yourself familiar with the bare metal installation process, read on to learn the details on how I made this process work on Libvirt and KVM. I essentially followed the guide for installing the OpenShift cluster on bare metal and I recommend that you read this guide first. In order to take a closer look at the latest and greatest version of OpenShift, I installed OpenShift 4.1 on my laptop using Libvirt and KVM. It is a significant leap forward in the evolution of OpenShift mainly due to the incorporation of features developed by the folks at CoreOS. OpenShift 4.1 is the first GA release in the OpenShift 4 series. If you are interested in deploying your own OpenShift instance whether for evaluation or testing please follow along with me. In this blog post, originally posted on Ales Nosek - The Software Practitioner, I am going to talk about how I installed OpenShift 4.1 on a Fedora laptop with 16 GB of RAM.

Install haproxy on redhat 6