After you upgrade the vCenter Server, the next task for the vSAN cluster upgrade is upgrading the ESXi hosts to use the current version.

You can upgrade the ESXi hosts in the vSAN cluster using:
  • vSphere Lifecycle Manager - By using images or baselines, vSphere Lifecycle Manager enables you to upgrade ESXi hosts in the vSAN cluster. The default evacuation mode is Ensure data accessibility. If you use this mode, and while upgrading vSAN you encounter a failure, data can become inaccessible until one of the hosts is back online. For information about working with evacuation and maintenance modes, see Working with Maintenance Mode. For more information about upgrades and updates, see the Managing Host and Cluster Lifecycle documentation.
  • Esxcli command - You can use components, base images, and add-ons as new software deliverables to update or patch ESXi 7.0 hosts using the manual upgrade.

When you upgrade a vSAN cluster with configured fault domains, vSphere Lifecycle Manager upgrades a host within a single fault domain and then proceeds to the next host. This ensures that the cluster has the same vSphere versions running on all the hosts. When you upgrade a stretched cluster, vSphere Lifecycle Manager upgrades all the hosts from the preferred site and then proceeds to the host in the secondary site. This ensures that the cluster has the same vSphere versions running on all the hosts. For more information on the upgrading a stretched cluster, see the Managing Host and Cluster Lifecycle documentation.

Before you attempt to upgrade the ESXi hosts, review the best practices discussed in the vSphere Upgrade documentation. VMware provides several ESXi upgrade options. Choose the upgrade option that works best with the type of host that you are upgrading. For detailed instructions and upgrade options, see the VMware ESXi Upgrade documentation.

What to do next

  1. (Optional) Upgrade the vSAN disk format. See Upgrade vSAN Disk Format Using RVC.
  2. Verify the host license. In most cases, you must reapply your host license. For more information about applying host licenses, see the vCenter Server and Host Management documentation.
  3. (Optional) Upgrade the virtual machines on the hosts by using the vSphere Client or vSphere Lifecycle Manager.