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README.md
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README.md

Configure ignition files

Ignition files are used by the RHCOS to determine hwo to configure each node.

Run the following the machine you plan to install OpenShift from after you have configured the installer.

Define OpenShift Version

$ export OC_VERSION="4.2.0"

Generate Cluster key

$ ssh-keygen -t rsa -b 4096 -f ~/.ssh/cluster-key -N ''

$ chmod 400 /home/$USER/.ssh/cluster-key.pub
$ cat  /home/$USER/.ssh/cluster-key.pub

Add key to environment so you may ssh into coreos node

eval "$(ssh-agent -s)"
ssh-add  /home/$USER/.ssh/cluster-key.pub

Create Directory for config files

mkdir -p ocp4
cd ocp4

Get pull secert from the url below

Create a reference bare metal install-config

cat >install-config-base.yaml<<EOF
apiVersion: v1
baseDomain: example.com
compute:
- hyperthreading: Enabled
  name: worker
  replicas: 2
controlPlane:
  hyperthreading: Enabled
  name: master
  replicas: 3
metadata:
  name: ocp4
networking:
  clusterNetworks:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  networkType: OpenShiftSDN
  serviceNetwork:
  - 172.30.0.0/16
platform:
  none: {}
pullSecret: 'Fill with pull secert'
sshKey: 'Fill with cluster-key.pub key generated key file output'
EOF

Create a reference vSphere install-config

cat >install-config-base.yaml<<EOF
apiVersion: v1
baseDomain: example.com, .ext-example.com
proxy:
  httpProxy: http://<username>:<pswd>@<ip>:<port>
  httpsProxy: http://<username>:<pswd>@<ip>:<port>
  noProxy: example.com
additionalTrustBundle: |
    -----BEGIN CERTIFICATE-----
    <MY_TRUSTED_CA_CERT>
    -----END CERTIFICATE-----
compute:
- hyperthreading: Enabled
  name: worker
  replicas: 0
controlPlane:
  hyperthreading: Enabled
  name: master
  replicas: 3
metadata:
  name: ocp4
networking:
  clusterNetworks:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  networkType: OpenShiftSDN
  serviceNetwork:
  - 172.30.0.0/16
  machineCIDR: 192.168.1.0/24
platform:
  vsphere:
    vcenter: your.vcenter.server
    username: username
    password: password
    datacenter: datacenter
    defaultDatastore: datastore
pullSecret: 'Fill with pull secert'
sshKey: 'Fill with cluster-key.pub key generated key file output'
EOF

Copy reference install config to final

cp install-config-base.yaml install-config.yaml

Create install configs

openshift-install create ignition-configs --dir=ocp4

For Bare Metal Installations Follow
Creating the Kubernetes manifest and Ignition config files

For VMWARE Installations Follow Creating Red Hat Enterprise Linux CoreOS (RHCOS) machines in vSphere

Copy install bootstrap.ign master.ign and worker.ign to helpernode or webserver

# example directory
$ ls /var/www/html/openshift4/4.2/ignitions/
bootstrap.ign  master.ign  worker.ign