Ability for shoot user to reboot a Node's backing VM Instance

[elankath]

How to categorize this issue?

/area control-plane
/kind enhancement
/priority 3

What would you like to be added:

• A shoot user annotates the Node for a reboot request using node.machine.sapcloud.io/trigger-reboot
• The shoot user then deletes the Node object. (He is required to have the necessary authorization)
• In the trigger deletion flow, the MCM will not perform VM Deletion but instead VM Reboot using the native cloud provider VM Reset/Reboot feature if available. A new Driver method Driver.RebootMachine will need to be created to support this.
• TODO: Elaborate process if reboot fails.

Why is this needed:

Stakeholders wish for the MCM to offer a way to reboot the backing VM Instance associated with a Node via leveraging the native cloud provider reboot/reset API without terminating the VM instance.