Create the Red Hat OpenShift Installation Configuration File

The Red Hat OpenShift install-config.yaml file provides configuration options to the installation program and facilitates the creation of its manifest files.

Procedure

Log in to your Linux host by using a Secure Shell (SSH) client.
Create a working folder for the installation of Red Hat OpenShift.
```
mkdir ~/ocp
```
Go to the working folder for the installation of Red Hat OpenShift.
```
cd ~/ocp
```

Create аn install-config.yaml installation file with the following contents.

apiVersion: v1
baseDomain: sfo.rainpole.io
compute:
- hyperthreading: Enabled 
  name: worker
  replicas: 0
controlPlane:
  hyperthreading: Enabled
  name: control-plane
  replicas: 3
metadata:
  name: sfo-w01-ocp01
networking:
  networkType: NCP
  clusterNetwork:
  - cidr: 100.100.0.0/16
    hostPrefix: 23
  serviceNetwork:
  - 100.200.0.0/16
  machineCIDR: 192.168.23.0/24
platform:
  vsphere:
    vcenter: sfo-w01-vc01.sfo.rainpole.io
      username: administrator@vsphere.local
      password: <admin password>
      datacenter: sfo-w01-dc01
      defaultDatastore: sfo-w01-cl01-ds-vsan01
pullSecret: '<pull secret>'
sshKey: '<ssh public key>'