8.1.9 Sample HA Cluster Configuration
A service provider’s VMware Cloud Provider Program platform typically configures all vSphere HA parameters consistently across all clusters in all data centers. This helps to limit variability and simplify operational management. The following table provides design guidance for service providers by addressing the standard settings and options configured for vSphere HA attributes.
Table 17. Sample vSphere HA Settings
Attribute | Configuration |
Cluster Name | boston-dc-01-payload-003 |
Number of ESXi Hosts | 24 |
Host Monitoring | Enabled |
Admission Control Response | Prevent virtual machines from being powered on if they violate availability. |
Admission Control Policy | Enabled: Percentage of resources reserved: 13% CPU 13% Memory N+3 for 24 node cluster (based on 1 to 8 Ratio) |
Default Virtual Machine Restart Priority | Medium (majority of VMs) Modify if necessary at VM level for High (critical VMs) / Disabled (non-critical VMs) |
Host Isolation Response* | Shut down or power off |
Virtual Machine Monitoring | Disabled |
Virtual Machine Monitoring Sensitivity | N/A |
Heartbeat Datastores | Automatically select datastores accessible from the host (default) |
* Host isolation response refers to the action that vSphere HA takes when the host becomes isolated. The best practice in a vSAN environment might differ from a traditional storage vSphere HA design, depending on the deployed configuration. For information about the specific vSAN host behavior during a host isolation event, see the
vSAN Support Center at
https://www.vmware.com/support/virtual-san.