6.5.1

Table Of Contents
Verify Load Balancer Before Upgrading vCenter Server
If you are using a load balancer for high availability for vCenter Single Sign-On or
Platform Services Controller, you must verify that it is supported and configured correctly before
upgrading to vCenter Server 6.5.
In environments with less than four vCenter Server systems, VMware typically recommends a single
Platform Services Controller instance and the associated vCenter Single Sign-On service. In larger
environments, consider using multiple Platform Services Controller instances, protected by a network load
balancer. The white paper vCenter Server 6.0 Deployment Guide on the VMware website discusses this
setup. For current information on maximums, see the Configuration Maximums.
See http://kb.vmware.com/kb/2112736 for vCenter Single Sign-On high availability compatibility matrix.
Prerequisites
Procedure
1 Review the vCenter Server 6.0 Deployment Guide documentation for load balancing information.
2 If your load balancer is not supported, replace it with a supported load balancer.
3 Verify that the load balancer is correctly configured based on recommendations in vCenter Server
Deployment Guide.
Prepare ESXi Hosts for vCenter Server Upgrade
Before upgrading to vCenter Server 6.5, you must prepare your ESXi hosts.
Prerequisites
To upgrade vCenter Server, your ESXi hosts must be at version 5.5. If your ESXi hosts are at an earlier
version than 5.5, upgrade them to 5.5. Read and follow all best practices when upgrading your hosts to
ESXi 5.5.
Procedure
1 To keep your current SSL certificates, back up the SSL certificates that are on the vCenter Server
system before you upgrade to vCenter Server 6.5.
The default location of the SSL certificates is %allusersprofile%\Application
Data\VMware\VMware VirtualCenter.
2 If you have Custom or Thumbprint certificates, see Host Upgrades and Certificates to determine your
preparatory steps.
3 Run vCenter Host Agent Pre-Upgrade Checker.
vSphere Upgrade
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