With Update Manager you can apply extensions to ESXi hosts. An extension is any additional software that can be installed on the host or patched if the additional software already exists on the host.
To perform the initial installation of an extension, you must use an extension baseline. After the extension is installed on the host, you can update the extension module with either patch or extension baselines.
When applying extension baselines by using Update Manager, you must be aware of the functional implications of new modules to the host. Extension modules might alter the behavior of ESXi hosts. During installation of extensions, Update Manager only performs the checks and verifications expressed at the package level.
This workflow describes the overall process to apply extensions to the hosts in your vSphere inventory. You can apply extensions to hosts at a folder, cluster or datacenter level. You can also apply extensions to a single host.
- Configure the Update Manager host and cluster settings.
Some updates might require that the host enters maintenance mode during remediation. You should configure the Update Manager response when a host cannot enter maintenance mode. If you want to apply updates at a cluster level, you should configure the cluster settings as well. You can configure the Update Manager settings from the Configuration tab of the Update Manager Administration view. For more information and the detailed procedure about configuring host and cluster settings by using Update Manager, see Configuring Host and Cluster Settings.
- (Optional) Import an offline bundle to download extensions to the Update Manager server.
Offline bundles might contain extensions that you download from the Internet or copy from a media drive. Offline bundles are ZIP files that can be located on a local or a shared network drive. You can import offline bundles from the Configuration tab of the Update Manager Administration view. For more information about importing offline bundles and for a detailed procedure on importing offline bundles, see Import Patches Manually.
- Create extension baselines.
You can create host extension baselines from the Baselines and Groups tab in the Update Manager Administration view. For a detailed procedure about creating extension baselines, see Create a Host Extension Baseline.
- Attach the extension baselines to a container object containing the hosts that you want to remediate.
To scan and remediate hosts, attach the extensions baselines to a container object containing the hosts to which you want to apply the extensions. The container object can be a folder, cluster, or datacenter. You can attach baselines and baseline groups to objects from the Update Manager Compliance view. For more information about attaching baselines and baseline groups to vSphere objects, see Attach Baselines and Baseline Groups to Objects.
- Scan the container object.
After you attach baselines to the selected container object, you must scan it to view the compliance state of the hosts in the container. You can scan selected objects manually to start the scanning immediately. For detailed instructions on how to scan your hosts manually, see Manually Initiate a Scan of ESXi Hosts.
You can also scan the hosts in the container object at a time convenient for you by scheduling a scan task. For more information and detailed instructions about scheduling a scan, see Schedule a Scan.
- Review the scan results displayed in the Update Manager Client Compliance view.
For a detailed procedure about viewing scan results and for more information about compliance states, see Viewing Scan Results and Compliance States for vSphere Objects.
- (Optional) Stage the extensions from the attached baselines to the ESXi hosts.
You can stage the extensions and copy them from the Update Manager server to selected hosts before applying them. Staging extensions speeds up the remediation process and helps minimize host downtime during remediation. For a detailed procedure about staging patches and extensions to hosts, see Stage Patches and Extensions to ESXi Hosts.
- Remediate the hosts in the container object against extension baselines.
You can remediate the container object of the hosts against the attached baselines. If hosts are in a Non-Compliant state, remediate the container object to make the hosts compliant with the attached baselines. You can start the remediation process manually or schedule a remediation task. See Remediate Hosts Against Patch or Extension Baselines for a detailed procedure.
During staging extensions and extension remediation, Update Manager performs prescan and postscan operations. After remediation is completed, the compliance state of the hosts against the attached baselines is updated to Compliant.