How to enable/disable configuration of vSAN high availability isolation address(es).

Products

• VMware SDDC Manager
• VMware vSAN

Issue/Introduction

• As part of the SDDC Manager operations listed below, vSAN high availability (HA) isolation address(es) will be configured to the expected values calculated by the SDDC Manager. Any manually configured vSAN HA isolation address(es) which are not part of the expected values will be unconfigured.
• Operations which will cause reconfiguration of vSAN HA isolation addresses:

  Create a workload domain
  Create cluster
  Remove cluster
  Expand a cluster by adding host(s)
  Shrink a cluster by removing host(s)
  Stretch a cluster
  Unstretch a cluster
  Apply configuration updates post SDDC Manager upgrade

Environment

VCF 5.1 
VCF 5.2

Cause

It is expected for the SDDC Manager to re-configure the vSAN HA isolation addresses and hence remove any unexpected values. However, flexibility is added to support customization from the user side.

Resolution

To disable the automatic configuration and re-configuration of vSAN high availability isolation addresses during running operations, follow the below steps:

1. SSH to the SDDC Manager and change to root user:

    su - 

    
2. Append the value below in this file "/etc/vmware/vcf/domainmanager/application.properties".
   

   configuration.disable.setting.ha.isolation.addresses=true
   

3. Restart the domain manager service

   systemctl restart domainmanager

4. In order to re-enable the configuration of vSAN HA isolation addresses remove the value "configuration.disable.setting.ha.isolation.addresses=true" that was added in the file "/etc/vmware/vcf/domainmanager/application.properties" and restart the domain manager service.