The vSAN cluster shutdown workflow will fail with error "'NoneType' object is not iterable"

Products

• VMware vSAN

Issue/Introduction

Symptoms:

The vSAN cluster shutdown workflow will fail with error "'NoneType' object is not iterable" when shutting down an IPv6-disabled cluster.

By default, ESXi IPv6 support is enabled. You can check the IPv6 status of a host by clicking on it in the vSphere UI inventory, select Configure, under Network, select TCP/IP Configuration, on the top right, click IPv6 Configuration, it will give you a pop-up window similar to the following screenshot if IPv6 is disabled.

If you have no access to the vSphere UI, you can consult the IPv6 status of a host by using the following commands on ESXi Shell / SSH:

# esxcli network ip get
IPv6Enabled: false

# esxcfg-info -a | grep "ipv6=[0,1]"
|----Options............................................ipv6=0

If you see ipv6=0, it means it is disabled, if you see ipv6=1, it is enabled.

Environment

VMware vSAN 8.0.x

Cause

This issue occurs when IPv6 is disabled on a vSAN cluster of ESXi 8.0 Update 1 hosts.

Resolution

This issue is resolved in VMware vSphere ESXi 8.0 U1c or later. To download go to Customer Connect Patch Downloads

Workaround:

You can re-enable IPv6. Please consult our documentation.

You can also use the other method to shutdown and restart your vSAN cluster, please consult Manually Shut Down and Restart the vSAN Cluster.