This guide explains how to deploy OpenShift on Bare Metal (UPI) in a VMware environment using a Service Node, Bootstrap Node, Control Plane, and Worker Nodes.
Log in to Red Hat Console:
Goto - > Clusters -> Data Center -> Other Datacenter Options -> (Bare Mtail /x86_64)
References:
Requirements:
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0 |
Service node/bastion |
Any linux, I am using Rocky |
2 interfaces: Eth0 , eth1 Eth0 for external using NAT
automatic ip. Eth1 is internal hostonly.
(192.168.22.1/24) |
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Services |
Firewall/router, DNS,
webserver, ingress/LoadBalancer,dhcp, |
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Openshift Installer |
Installer script from
console.redhat |
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Pull secret |
From redhat console |
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Cli agent tools |
Client tools |
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Redhat core os boot iso file to
boot |
Rhcos*.io |
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Actual Redhat core OS raw.gz
file |
Rhcos*.raw.gz |
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Ignition files (16-22 hours of life after generations) |
Run ignition (.ign) file with os file (raw.gz ) files on nodes
with coreos-installer command |
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Timezone |
UTC, same as coreos by default |
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NAT, IP forwarding |
Enable using firewalld |
From internal to external |
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1 |
Bootstrap node |
based on the installer |
nmtui :ip 22.200, gw 22.1, ns:
22.1, search domain: ocp.lan |
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2 |
Masters |
based on the installer |
nmtui :ip 22.201-203, gw 22.1,
ns: 22.1, search domain: ocp.lan |
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3 |
Workers |
based on the installer |
nmtui :ip 22.211-213, gw 22.1,
ns: 22.1, search domain: ocp.lan |
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4 |
Vmware vmx files |
In all VMs' vmx files, add this
before booting |
Disk.EnableUUID =
"TRUE" |
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5 |
Vm storage |
Check drive type ·
SCSI / SATA controllers →
Devices show up as /dev/sdX. ·
NVMe controllers →
Devices show up as /dev/nvmeXnY |
lsblk |
My VMWare Settings (Virtual
Network Editor)
To simulate a production-like isolated OpenShift environment, I used a host-only network as a private subnet accessible via a bastion (service) node. The bastion has an additional NAT interface (vmnet8) to share the host’s internet, acting as a gateway for the OpenShift nodes.
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