Goal

Currently, the Hypershift's HostedCluster and NodePool APIs are difficult to use directly. The "hcp" cli alleviates this complexity to some degree, but comes at the cost of requiring usage of a cli tool rather than creating the resources directly.

The Goal of this epic is to reduce the complexity of the HostedCluster and NodePool APIs to the point that users only need to specify a small set of values in these apis initially at create time, then during admission have a mutating webhook fill in the remaining details using the defaults that the "hcp" cli currently uses.

Essentialy, the goal here is to move the "magic" defaulting that is so convenient to users out of the "hcp" tool and to the hypershift operator backend using a mutation webhook.

User Stories

• As a user creating self-managed HCP clusters, I would like to create an HCP using only HostedCluster and NodePool resources and have the backend controllers generate the etcd and ssh key secrets on my behalf
• As a user creating self-managed HCP clusters, I’d like to provide a minimal HostedCluster and NodePool spec and have the backend perform all the platform specific defaulting at creation time.

Non-Requirements

Notes

• WIP design document https://docs.google.com/document/d/1lFknxPASyGGGyurjLmGvXV5JJKJ-WnOSncMm7ej-gI4/edit 

Done Checklist