After vSphere vSphere Distributed Switch has been created and connected with all hosts, enable vSphere HA on the cluster. 

1

Log in to the Management vCenter Server by using the vSphere Web Client.

a

Open a Web browser and go to https://mgmt01vc01.sfo01.rainpole.local/vsphere-client.

b

Log in using the following credentials.

Setting

Value

User name

administrator@vsphere.local

Password

vsphere_admin_password

2

In the Navigator, click Host and Clusters.

a

Expand the mgmt01vc01.sfo01.rainpole.local inventory.

b

Select the SFO01-Mgmt01 cluster.

3

Click the Configure tab and click vSphere Availability.

4

Click Edit.

5

In the Edit Cluster Settings dialog box, select the Turn on vSphere HA check box.

6

Under Virtual Machine Monitoring, under Failures and Responses, select the following values:

Setting

Value

Enable Host Monitoring

Selected

Host Failure Response

Restart VMs

Response for Host Isolation

Power off and restart VMs

Datastore with PDL

Disabled

Datastore with APD

Disabled

VM Monitoring

VM Monitoring Only

7

Click Admission Control.

8

Under Admission Control enter the following settings.

Setting

Value

Host failures cluster tolerates

1

Define host failover capacity by

Cluster resource percentage

Override calculated failover capacity

Deselected

Performance degradation VMs tolerate

100%

9

Click OK.