Docs for GA/2.6.5

[rosskirkpat]

this issue will track docs items/tasks that were bumped from 2.6.4 #150

Three Major Features to Document for 2.6.5:

• gMSA (experimental)

  • Document how to deploy the chart in an RKE2 Windows cluster in Rancher 2.6.4 with screenshots
  • Document minimum configuration/version requirements for end-user AD to support the feature/chart

• Windows Support for RKE2 vSphere Node Driver Clusters

  • Document how to deploy an RKE2 Windows Machine Pool in an RKE2 vSphere cluster in Rancher 2.6.4 with screenshots (docs ref 1 2)
  • Document minimum configuration/version requirements for end-user vSphere to support the feature

• PNI for Calico in RKE2 Windows Clusters

  • Create and publish a simple test manifest that an end-user can deploy to verify PNI is working in rancher/windows repo
  • Document how to enable PNI when creating a new RKE2 cluster
  • Document any pitfalls around trying to enable PNI after a cluster has been created (ex. it might not be possible or supported via SLA)

General Documentation:

• Document how to create an RKE2 custom cluster with Windows worker nodes
• Versions of Windows Server that are supported
• Requirements for Windows support in an RKE2 cluster
• CNI limitations for Windows support
• Are there any additional port requirements when using Windows nodes in an RKE2 cluster?
• Document why DSR is enabled by default on a RKE2 Windows worker and why it cannot be disabled (DSR provides scaling benefits, Calico requires DSR being enabled, etc)
• Document DNS limitations in RKE2 clusters compared to RKE1 clusters (internal DNS server may be required for some environments)
• Document that dual-stack is NOT supported for Windows Server and cannot be enabled on RKE2 cluster with Windows workers (we don't stop a user from enabling dual stack but it will not work on the Windows nodes)
• Document how to use nodes electors/node affinities when scheduling workloads
• Document that RKE2 Windows does not make use of RKE1 Windows taints/tolerations
• Document Supported Calico Configuration (no BGP, no ipipMode, etc)

2.6.5 Release Notes:

• v1.21.x of RKE2 will remain experimental and unsupported for RKE2 Windows
• When upgrading Windows nodes in RKE2 clusters via the Rancher UI, Windows worker nodes will require a reboot after the upgrade is completed.
  Further items to document and release note:
• RKE2 provisioning GA for Windows will only support v1.22 and up of RKE2
• Document/Release note Windows Server 2022 issues with nodeports