A new monitoring application is being rolled out across the Organization.

The best option to automate the installation of the local agent on all Linux VMs is to create an Endpoint that includes all Linux VMs and include the Endpoint in a Runbook that executes a shell script for agent installation. This way, the administrator can leverage the Calm Runbook feature, which allows orchestrating tasks across multiple VMs without the need of a blueprint or an application. The administrator can also filter the VMs by name, tag, or other criteria to select the target VMs for the Endpoint. The shell script can be added as a task in the Runbook and run on the selected Endpoint.

Option A is not correct because a Brownfield deployment is used to create an application from existing VMs and an existing blueprint. It is not suitable for automating tasks across multiple VMs without a blueprint. Moreover, a Brownfield deployment cannot attach to post-Calm created VMs, as they are already managed by Calm.

Option C is not correct because creating a new golden image and deploying all VMs again is a very time-consuming and disruptive process. It also requires the administrator to migrate the data and configuration of the existing VMs to the new ones. This option does not leverage the Calm automation capabilities and is not recommended. References: Nutanix Calm Runbooks & API Automation, Nutanix Support & Insights, Calm 3.0 is Here!, Nutanix Cloud Manager