[VMC on AWS] 2 Node SDDC - Unable to power on VM- Insufficient resources to satisfy configured failover level for vSphere HA

Products

• VMware Cloud on AWS

Issue/Introduction

Symptoms:
In Two node SDDC, While trying to power on VM getting below error: - Insufficient resources to satisfy configured failover level for vSphere HA

 

Cause

This is expected behavior. On a 2-host cluster, admission control reserves 50% of the resources allowing you to powerON only 1 host worth of VMs in the cluster. This is to ensure that in the event of a single host failure, all VMs can be restarted successfully on the lone surviving host:


 

Resolution

In order to provide a long-term solution, One or a combination of the following options will resolve the issue:

• Scale-up the cluster size.
• Power off the unwanted VM and try to power on an important VM
• Uninstall SRM/HCX VMs to free up resources in the cluster.

Additional Information

As per the FAQ:https://cloud.vmware.com/vmc-aws/faq#service-operations
DRS and HA settings are fixed to values that provide the best performance and availability for both management components as well as virtual machines deployed.

vSphere 7 Documentation https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.resmgmt.doc/GUID-2920FC03-2BE9-4927-B27A-E645EF6F7D17.html