Installation of OpenShift Platform

[Tran_Huy]

After completing the DO280 course, I attempted to install an OpenShift cluster with 3 master nodes and 2 worker nodes on my company’s on-premise environment.

The challenge is that all nodes are running Ubuntu OS, and there is no official documentation guiding installation on this OS.

I would like to ask whether OpenShift supports installation on VMs created via vSphere using Ubuntu OS. Regardless of the answer, please provide official documentation or references that I can present to my company.

Thank you.

[eurodrigolira]

No, it requires a Red Hat operating system, especially for subscription purposes.

See the link below for requirements.

https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/installation_overvie...

[Chetan_Tiwary_ · Accepted solution]

@Tran_Huy No UbuntuOS is not supported - you are going into a risk of unsupported OCP cluster. 

The supported operating system for OpenShift worker and master nodes is Red Hat CoreOS (RHCOS), which is a minimal, container-optimized OS designed and supported by Red Hat for OpenShift clusters.

If you plan to install and run a fully supported OpenShift cluster, nodes should run RHCOS for guaranteed support and best compatibility.

Refer : https://docs.redhat.com/en/documentation/openshift_container_platform/4.8/html/installing/installing... 

[Chetan_Tiwary_ · Accepted solution]

ok you asked for official references : 

https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html/deploying_installer-... 

https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/architecture/archite... 

[Tran_Huy]

What if I try to install an OpenShift cluster on nodes using RHEL 9? @Chetan_Tiwary_ 

[Chetan_Tiwary_]

@Tran_Huy no, The bootstrap and control plane machines must use Red Hat Enterprise Linux CoreOS (RHCOS) as the operating system. However, the compute machines can choose between RHCOS, RHEL 8.6 and later.

https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/installing_on...