Rancher Lifecycle improvement

[tuxtof]

This pull request introduces a configurable timeout for Nutanix operations, improving flexibility and error handling in the NutanixDriver. The changes include adding a new Timeout parameter, updating logic to use this parameter, and enhancing error handling during VM creation and deletion processes.

Timeout Configuration and Usage:

• Added a new Timeout field to the NutanixDriver struct and updated the SetConfigFromFlags method to set its value from the nutanix-timeout flag. The default value is 300 seconds (machine/driver/driver.go, [1] [2] [3].
• Updated all loops that previously had a fixed iteration count (60 iterations) to dynamically calculate iterations based on the Timeout value divided by 5 seconds (machine/driver/driver.go, [1] [2] [3] [4].

Improved Error Handling:

• Enhanced the Remove method to handle cases where the VM ID is empty or the VM is already deleted. Added specific logging for these scenarios (machine/driver/driver.go, [1] [2].
• Added logic to delete a VM if it times out while waiting for an IP address during creation (machine/driver/driver.go, machine/driver/driver.goL527-R505).

Code Cleanup:

• Removed redundant code that waited for VM disks to be available, simplifying the VM creation process (machine/driver/driver.go, machine/driver/driver.goL484-R490).

[Copilot]

Pull Request Overview

This PR enhances the Nutanix driver by adding configurable timeout support and improving error handling for VM lifecycle operations. The changes replace hardcoded timeout values with a user-configurable parameter and add better error handling for edge cases.

Key Changes:

• Added configurable timeout parameter to replace hardcoded 60-iteration loops
• Enhanced error handling in VM removal to handle missing VMs gracefully
• Added cleanup logic to delete VMs that timeout during IP address assignment