Hey all, this post I will cover how I create virtual machines on proxmox. It is a very basic example without automation or anything. The purpose is simply create the infrastructure required for my adventure on installing an openshift cluster, the hard way...
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Installing Openshift the hard way
Building VMs
This section is dedicated for the build of the virtual machines required for the openshift environment.
We are going to build the following VMs:
| Hostname | Function | CPU | Memory | Storage | Image | Network | IP address |
|---|---|---|---|---|---|---|---|
| ocp-bastion.ocp.lan | Offline Registry/Proxy | 4 | 8192 | 500 | Ubuntu 24.04 | ocp + external | 192.168.1.10, 10.0.0.36 |
| ocp-tools.ocp.lan | DHCP+NTP | 1 | 4096 | 32 | Ubuntu 24.04 | ocp | 192.168.1.5 |
| ocp-dns.ocp.lan | DNS | 1 | 4096 | 32 | Ubuntu 24.04 | ocp | 192.168.1.6 |
| ocp-lbexternal.ocp.lan | External LB | 1 | 2048 | 32 | Ubuntu 24.04 | ocp + external | 192.168.1.6, 10.0.0.35 |
| ocp-bootstrap.lab.ocp.lan | bootstrap | 4 | 16384 | 50 | Rhcos-4.18.1 | ocp | 192.168.1.200 |
| ocp-cp-1.lab.ocp.lan | Control plane | 8 | 16384 | 50 | Rhcos-4.18.1 | ocp | 192.168.1.201 |
| ocp-cp-2.lab.ocp.lan | Control plane | 8 | 16384 | 50 | Rhcos-4.18.1 | ocp | 192.168.1.202 |
| ocp-cp-3.lab.ocp.lan | Control plane | 8 | 16384 | 50 | Rhcos-4.18.1 | ocp | 192.168.1.203 |
| ocp-w-1.lab.ocp.lan | Worker Node | 4 | 8192 | 50 | Rhcos-4.18.1 | ocp | 192.168.1.204 |
| ocp-w-2.lab.ocp.lan | Worker Node | 4 | 8192 | 50 | Rhcos-4.18.1 | ocp | 192.168.1.205 |
| ocp-w-3.lab.ocp.lan | Worker Node | 4 | 8192 | 50 | Rhcos-4.18.1 | ocp | 192.168.1.206 |
Downloading the ISO images
Bellow the necessary images for our openshift build:
Ubuntu 24.04 - I selected Ubuntu due to the ease of use and the number of available tutorials.
Rhcos-4.18.1-x86_64-live.x86_64.iso - This is an immutable OS ideal for container load and recommended for openshift installation.
Loading the image into proxmox
- On the proxmox server, select the disk where the image will be stored.
- Select ISO Images.
- Click on Upload.
- Select the location of the file and upload it to proxmox server.
Creating dedicated network
I am creating a new and isolated network to host my cluster. I want to simulate the scenario where it is common in my workplace, a totally isolated cluster.
- Select your proxmox server and select network.
- Create a Linux bridge.
- Apply the new configuration.
Creating the VMs
Lets create the VMs that I have specified on the table above.
- On proxmox, click create VM.
- Choose the name.
- Make the selection for image, disk, CPU, memory, network as the table. and confirm to create the VM.
- For machines that have 2 networks connected, we have to add the second network after the VM is created. Click on the VM, Hardware and add a network device. Choose the OCP network.
Take note of the mac address, we will need this info to populate the DHCP server.
Repeat same process for all other nodes.
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