You can customize the upgrade sequence of the hosts, disable certain hosts from the upgrade, or pause the upgrade at various stages of the upgrade process.

All the existing standalone vSphere ESX hosts, vSphere ESX hosts managed by vCenter Server in a single cluster, and KVM hosts are grouped in separate host upgrade unit groups by default.

Before you upgrade the hosts, you can select to update the hosts simultaneously or consecutively. If you select simultaneous upgrade for all the hosts and host upgrade unit groups in your environment, the maximum limit for a simultaneous upgrade is five host upgrade unit groups and five hosts per group.

Note:

Host upgrade unit group with vSphere ESX hosts managed by vCenter Server in a single cluster can be only upgraded consecutively.

You can customize the host upgrade sequence prior to the upgrade. You can edit a host upgrade unit group to move a host to a different host upgrade unit group that upgrades immediately and another host to a host upgrade unit group that upgrades at a later date. If you have a frequently used host, you can reorder the upgrade sequence of the host within a host upgrade unit group so it is upgraded first and move the least used host to upgrade last.

Note:

If you register any vSphere ESX host after uploading the latest upgrade bundle, you must click Reset so that you can upgrade the recently added vSphere hosts.

Prerequisites

  • Verify that for standalone vSphere ESXi hosts not managed by vCenter Server, the tenant VMs running on the vSphere ESXi hosts are powered off and these hosts are in maintenance mode.

  • Verify that for vSphere ESXi hosts that are part of a DRS enabled cluster, the tenant VMs running on the vSphere ESXi hosts are not powered off.

    Do not put the vSphere ESXi hosts in maintenance mode. NSX-T Data Center migrates the VMs running on the host to another host in the same cluster during the upgrade.

  • Verify that for vSphere ESXi hosts that are part of a DRS disabled cluster, the tenant VMs running on the vSphere ESXi hosts are powered off. Put the vSphere ESXi hosts in maintenance mode.

  • For KVM hosts, the VMs do not need to be powered off.

  • Verify that the transport zone or transport node N-VDS name does not contain spaces. If there are spaces, create a transport zone with no spaces in the N-VDS name, reconfigure all the components that are associated with the old transport zone to use the new transport zone, and delete the old transport zone.

Procedure

  1. Complete the host upgrade plan details.

    You can configure the overall group upgrade order to set the host upgrade unit groups to be upgraded first.

    Option

    Description

    Serial

    Upgrade all the host upgrade unit groups consecutively.

    This menu item is selected by default and applied to the overall upgrade sequence. This selection is useful to maintain the step-by-step upgrade of the host components.

    For example, if the overall upgrade is set to serial and the host upgrade unit group upgrade is set to parallel, the host upgrade unit group is upgraded one after the other while hosts within the group are updated in parallel.

    Parallel

    Upgrade all the host upgrade unit groups simultaneously.

    You can upgrade up to five hosts simultaneously.

    When an upgrade unit fails to upgrade

    Select to pause the upgrade process if any host upgrade fails.

    This selection allows you to fix the error on the host upgrade unit group and resume the upgrade.

    After each group completes

    Select to pause the upgrade process after each host upgrade unit group finishes upgrading.

    By default, the upgrade pauses when all the hosts are upgraded. After you review the upgrade result, you can proceed to upgrade the next host upgrade unit group or the NSX Edge cluster.

  2. (Optional) Change the host upgrade unit group upgrade order.

    If you configure the overall group upgrade in the serial order, the upgrade waits for a host upgrade unit group upgrade to finish before proceeding to upgrade the second host upgrade unit group. You can reorder the host upgrade unit group upgrade sequence to set a host upgrade unit group to upgrade first.

    1. Select the host upgrade unit group and click the Actions tab.
    2. Select Reorder from the drop-down menu.
    3. Select Before or After from the drop-down menu.
    4. Click Save.
  3. (Optional) Remove a host upgrade unit group from the upgrade sequence.

    You can disable some host upgrade unit groups and upgrade them later.

    1. Select the host upgrade unit group and click the Actions tab.
    2. Select Set State from the drop-down menu.
    3. Select Disabled to remove the host upgrade unit group.
    4. Click Save.
  4. (Optional) Change the individual host upgrade unit group upgrade sequence.

    By default, the upgrade sequence is set to the parallel order.

    1. Select the host upgrade unit group and click the Actions tab.
    2. Select Set Upgrade Order from the drop-down menu.
    3. Select Serial to change the upgrade sequence.
    4. Click Save.
  5. Click Reset to discard your custom upgrade plan and revert to the default state.
    Caution:

    You cannot restore your previous upgrade configuration.

What to do next

Determine whether to add, edit, or delete host upgrade unit groups or to upgrade host upgrade unit groups. See Manage Host Upgrade Unit Groups or Upgrade Hosts Using the Upgrade Coordinator.