Removing host from a cluster at VCF fails at "Unconfigure HA isolation address for supplied cluster in vCenter Server"

Products

• VMware Cloud Foundation

Issue/Introduction

Symptoms:
Host removal workflow fails on "Unconfigure HA isolation address for supplied cluster in vCenter Server"

 

 

Environment

VMware Cloud Foundation 4.x

Cause

The isolation address is not configured for vSphere HA for the corresponding cluster. 

/var/log/vmware/vcf/domainmanager/domainmanager.log
============================================
YYYY-MM-DDT00:22:42.646+0000 ERROR [vcf_dm,0b4b0222496e4eb6,1e19] [c.v.v.c.c.f.a.i.BaseHaIsolationAddressOptionsAction,dm-exec-1]  Not found advanced option for isolation address 192.168.8.1 YYYY-MM-DDT00:22:42.654+0000 ERROR [vcf_dm,0b4b0222496e4eb6,1e19] [c.v.e.s.o.model.error.ErrorFactory,dm-exec-1]  [2QDKT4] VALIDATE_VSPHERE_HA_ISOLATION_ADDRESS_OPTIONS_CONFIGURATION_FAILED Validate Configure High Availability Isolation Address(es) failed for Cluster domain-c8 com.vmware.evo.sddc.orchestrator.exceptions.OrchTaskException: Validate Configure High Availability Isolation Address(es) failed for Cluster domain-c8         at com.vmware.vcf.common.contract.fsm.actions.impl.BaseHaIsolationAddressOptionsAction.postValidate(BaseHaIsolationAddressOptionsAction.java:158)         at com.vmware.vcf.common.contract.fsm.actions.impl.UnConfigureHaIsolationAddressOptionsAction.postValidate(UnConfigureHaIsolationAddressOptionsAction.java:131)

Resolution

1. Login to the vSphere UI for the vCenter(s) in question.
2. Select the affected cluster at which the removal of the host is failing
3. Select Configure > Under Services, vSphere Availability > Edit 

4. Select Advanced Options 


Option1: Configure a vSphere HA Isolation address. 
Add a line or enter the key in the option field and its corresponding value as shared below and click OK.

• Add/Edit das.isolationaddress[a number between 0 and 9]  and specify the desired IP

NOTE: Preferred IP is the vSAN Gateway IP Address or the MGMT Gateway IP Address

• Add/Edit das.usedefaultisolationaddress  and set its value to false

Option2: Remove vSphere HA Isolation address. 

• Delete out the das.usedefaultisolationaddress value
• Set das.usedefaultisolationaddress value to true and this will ensure that the default gateway of the management network is used

5. Disable and re-enable vSphere HA on the cluster for the changes to take effective.

6.Re-try the task of host removal from SDDC. 

 

Additional Information

For more information on vSphere HA options please refer to:
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.avail.doc/GUID-E0161CB5-BD3F-425F-A7E0-BF83B005FECA.html