Spike: Deliver OS/Kernel Patches for an existing site

[eak13]

Problem description
As part of ongoing operations, we need the ability to perform various component upgrades & understand the behavior of the site/clusters when these upgrades occur. When it comes to OS/Kernel patches for an existing site, the plan is to use Cluster API & Metal 3 to deliver a new image with the upgrades.

Proposed change

• Generate a new image via image-builder with a kernel and/or OS patches
• Test the ability to deliver the image to an existing cluster via Cluster API/Metal3.
• Document & provide findings of the upgrade (e.g. What was the process? What issues were encountered, if any?, etc.)
• Are there any other components that need to be upgraded at the same time?

[sreejithpunnapuzha]

As per the discussion in design call, we have identified all the issues. This is mentioned in the hackmd https://hackmd.io/@Pallav/BkU2FuWZY. Closing this spike story. Follow up for this will be done once baremetal-operator/ironic is uplifted.