In VMware Cloud Foundation, after you configure the vSAN stretched cluster, you change the admission control policy to reserve 50% of the capacity to support recovery if an availability zone failure occurs.

Procedure

  1. In a Web browser, log in to vCenter Server by using the vSphere Client.
    Setting Value
    URL https://sfo01m01vc01.sfo01.rainpole.local/ui
    User name administrator@vsphere.local
    Password vsphere_admin_password
  2. In the Hosts and clusters inventory, expand the sfo01w01vc01.sfo01.rainpole.local tree and expand the sfo01-w01dc data center.
  3. Select the sfo01-w01-shared01 cluster, and click the Configure tab.
  4. In the Services section, select vSphere Availability, and, in the vSphere HA section, click Edit.
  5. Click the Admission control tab and set Host failures cluster tolerates to 4.
  6. Click the Advanced options tab, click Add, configure the settings, and click OK.
    Setting Value
    das.isolationaddress0 172.16.43.253
    das.isolationaddress1 172.16.63.253
    das.usedefaultisolationaddress false