vSphere is a sophisticated product with multiple components to upgrade. Understanding the required sequence of tasks is vital for a successful vSphere upgrade.
Upgrading vSphere includes the following tasks:
- Read the vSphere release notes.
- Verify that you have backed up your configuration.
- If your vSphere system includes VMware solutions or plug-ins, verify that they are compatible with the vCenter Server appliance version to which you are upgrading. See VMware Product Interoperability Matrix at http://www.vmware.com/resources/compatibility/sim/interop_matrix.php.
- Upgrade vCenter Server.
For detailed instructions, see vCenter Server Upgrade
- Upgrade your ESXi hosts. See Overview of the ESXi Host Upgrade Process.
- To ensure sufficient disk storage for log files, consider setting up a syslog server for remote logging. Setting up logging on a remote host is especially important for hosts with a limited amount of local storage.
- Upgrade your VMs manually or by using vSphere Lifecycle Manager, to perform an orchestrated upgrade.