Installing single node with staticIP and nip.io

sno-staticip.txt

## Download Artifacts

## openshift-client 

curl -s https://mirror.openshift.com/pub/openshift-v4/clients/ocp/4.9/openshift-client-linux.tar.gz | tar zxvf - oc && mv oc /usr/local/bin

## butane 

wget https://mirror.openshift.com/pub/openshift-v4/clients/butane/latest/butane -O /usr/local/bin/butane && chmod +x /usr/local/bin/butane

## CoreOS live media 

wget https://mirror.openshift.com/pub/openshift-v4/dependencies/rhcos/latest/4.9.0/rhcos-live.x86_64.iso -O /var/lib/libvirt/images/rhcos-live.x86_64.iso

## Downloading coreos-installer 

wget https://mirror.openshift.com/pub/openshift-v4/clients/coreos-installer/v0.8.0-3/coreos-installer -O /usr/local/bin/coreos-installer && chmod +x /usr/local/bin/coreos-installer

## Get Pull Secret

Download your pull secret from the https://cloud.redhat.com/openshift/install/pull-secret site and save on the file /root/pullsecret.txt

## Extract the openshift-baremetal-install installer 

oc adm release extract -a /root/pullsecret.txt --command=openshift-baremetal-install "quay.io/openshift-release-dev/ocp-release:4.9.8-x86_64" && mv ./openshift-baremetal-install /usr/local/bin/

## Creating install-config.yaml

mkdir sno 

## Variables 
export IP=192.168.122.200
export GATEWAY=192.168.122.1
export NETMASK=255.255.255.0
export CIDR=24
export INT=ens3
export CLUSTER_NAME=sno
export DNS=192.168.122.1
## USING NIP.IO 
export DOMAIN=${IP}.nip.io
## Make sure you have this files created
export PULL_SECRET=$(cat /root/pullsecret.txt)
export SSH_KEY=$(cat $HOME/.ssh/id_rsa.pub)

cat << EOF > sno/install-config.yaml
apiVersion: v1beta4
baseDomain: ${DOMAIN}
metadata:
  name: ${CLUSTER_NAME}
networking:
  networkType: OVNKubernetes
compute:
- name: worker
  replicas: 0
controlPlane:
  name: master
  replicas: 1
platform:
  none: {}
BootstrapInPlace:
  InstallationDisk: /dev/sda
pullSecret: |
  ${PULL_SECRET}
sshKey: |
  ${SSH_KEY}
EOF

## Creating machineconfig to apply the network configuration to the SNO node IP and hostname.

cat << EOF > sno/01-master-network.bu
variant: openshift
version: 4.9.0
metadata:
  name: 01-master-network-${INT}
  labels:
    machineconfiguration.openshift.io/role: master
storage:
  files:
    - path: /etc/NetworkManager/system-connections/${INT}.nmconnection
      mode: 0600
      overwrite: true
      contents:
        inline: |
          [connection]
          id=${INT}
          type=ethernet
          interface-name=${INT}

          [ethernet]
          mtu=1500

          [ipv4]
          address1=${IP}/${CIDR},${GATEWAY}
          dns=${DNS};
          method=manual

          [ipv6]
          method=disabled

    - path: /etc/hostname
      mode: 0644
      overwrite: true
      contents:
        inline: |
          singlenode
EOF

## Generate the manifests and copy the manifests

openshift-baremetal-install --dir=sno create manifests
butane sno/01-master-network.bu -o sno/openshift/01-master-network.yaml

## Generate the ign file

openshift-baremetal-install --dir=sno create single-node-ignition-config

## Customizing iso media 
coreos-installer iso ignition embed -fi /root/sno/bootstrap-in-place-for-live-iso.ign /var/lib/libvirt/images/rhcos-live.x86_64.iso
coreos-installer iso kargs modify -a "console=ttyS0 rd.neednet=1 ip=${IP}::${GATEWAY}:${NETMASK}:${HOSTNAME}:${INT}:none nameserver=${DNS}" /var/lib/libvirt/images/rhcos-live.x86_64.iso

## Time to test it, you can use VirtualBox, Vmware, or old laptop, just make sure to have the proper network interface name.

virt-install --name="master-sno" \
    --vcpus=4 \
    --ram=16384 \
    --disk path=/home/sno/master-snp.qcow2,bus=sata,size=120 \
    --network network=default,model=virtio \
    --boot menu=on \
    --console pty,target_type=serial \
    --cpu host-passthrough \
    --cdrom /var/lib/libvirt/images/rhcos-live.x86_64.iso &
    
virsh console master-sno 

# The machine will reboot 2x.. it might take 30 to 50 minutes to install, it depends on your internet and hardware! 
# start the install and go grab something! :) 


openshift-baremetal-install wait-for install-complete --dir /root/sno