Attaching a volume fails with Multi-Attach error "Volume is already exclusively attached to one node and can't be attached to another".

Products

• VMware Tanzu Kubernetes Grid Integrated Edition
• VMware vCenter Server

Issue/Introduction

You see an error similar to the following when deploying pods with volumes in TKGI: 

Warning FailedAttachVolume 10m attachdetach-controller Multi-Attach error for volume "<volume id>" Volume is already exclusively attached to one node and can't be attached to another

 

Environment

VMware Tanzu Kubernetes Grid Integrated (TKGi)

Cause

When the TKGI cluster is having connection issues to vCenter Server, the volume cannot be added to the worker nodes properly, resulting in the noted error.

Resolution

Check the network connection between vCenter Server and the TKGI deployment and correct any firewalls blocking ports or intermittent connection issues.

For more information on Firewall Ports and Protocols requirement, see TKGI Ports and Protocols sections under Documentation.