6.0.2

If FT is turned on for any of the virtual machines on hosts within a cluster, temporarily turn o FT before
performing any Update Manager operations on the cluster. If FT is turned on for any of the virtual machines
on a host, Update Manager does not remediate that host. Remediate all hosts in a cluster with the same
updates, so that FT can be reenabled after the remediation. A primary virtual machine and a secondary
virtual machine cannot reside on hosts of dierent ESXi version and patch levels.
As you remediate hosts that are part of a Virtual SAN cluster, be aware of the following behavior:
n
The host remediation process might take an extensive amount of time to complete.
n
By design, only one host from a Virtual SAN cluster can be in a maintenance mode at any time.
n
Update Manager remediates hosts that are part of a Virtual SAN cluster sequentially even if you set the
option to remediate the hosts in parallel.
n
If a host is a member of a Virtual SAN cluster, and any virtual machine on the host uses a VM storage
policy with a seing for "Number of failures to tolerate=0", the host might experience unusual delays
when entering maintenance mode. The delay occurs because Virtual SAN has to migrate the virtual
machine data from one disk to another in the Virtual SAN datastore cluster. Delays might take up to
hours. You can workaround this by seing the "Number of failures to tolerate=1" for the VM storage
policy, which results in creating two copies of the virtual machine les in the Virtual SAN datastore.
Perform an Orchestrated Upgrade of Hosts Using vSphere Update Manager
You can use vSphere Update Manager to perform orchestrated upgrades of the ESXi hosts in your vSphere
inventory by using a single upgrade baseline, or by using a baseline group.
This workow describes the overall process to perform an orchestrated upgrade of the hosts in your
vSphere inventory. vSphere Update Manager 6.0 supports host upgrades to ESXi 6.0 for hosts that are
running ESXi 5.x.
You can perform orchestrated upgrades of hosts at the folder, cluster, or data center level.
N The last two steps in this procedure are alternatives. Choose one or the other.
Prerequisites
n
Make sure your system meets the requirements for vCenter Server 6.0, ESXi 6.0, and
vSphere Update Manager 6.0. See “Upgrade the Update Manager Server,” on page 135
n
Install or upgrade vCenter Server to version 6.0. See Chapter 4, “Upgrading and Updating vCenter
Server for Windows,” on page 73.
n
Install or upgrade vSphere Update Manager to version 6.0. See Chapter 7, “Upgrading Update
Manager,” on page 135.
Procedure
1 Congure Host Maintenance Mode Seings on page 158
ESXi host updates might require that the host enters maintenance mode before they can be applied.
Update Manager puts the ESXi hosts in maintenance mode before applying these updates. You can
congure how Update Manager responds if the host fails to enter maintenance mode.
2 Congure Cluster Seings on page 159
For ESXi hosts in a cluster, the remediation process can run either in a sequence or in parallel. Certain
features might cause remediation failure. If you have VMware DPM, HA admission control, or Fault
Tolerance enabled, you should temporarily disable these features to make sure that the remediation is
successful.
Chapter 9 Upgrading Hosts
VMware, Inc. 157