[HDDS-6022] [Multi-Tenant] Implement DeleteTenant: `ozone tenant delete`

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: HDDS-4944
• Labels: pull-request-available
• Assignee: Siyao Meng
• Reporter: Siyao Meng
• Created: 20/Nov/21 02:43
• Updated: 09/Dec/21 22:41
• Resolved: 09/Dec/21 22:41

Description

• Add a new field refCount for Ozone volumes that acts like a lock which prevents the volume from being deleted if refCount > 0
• Implement `ozone tenant delete` that will only remove all tenant information from DB (and Ranger) if there are no users assigned to this tenant and the volume is empty.

Issue Links

• links to: GitHub Pull Request #2857