You can discover and monitor your VMware virtual machines and ESX hosts alongside your network devices. Although your VMware devices and components behave like physical components, the process for discovering and monitoring those devices and components differs to accommodate the collection of data from vCenter. Although you can discover the VMs and ESX Hosts directly with SNMP, you may also want to collect vCenter data through the vCenter Server Application Insight Module (VCAIM).
You can discover ESX hosts and virtual machines in your VMware environment.
During inventory discovery, Data Aggregator identifies ESX hosts and virtual machines in the following ways:
Although each ESX host and virtual machine can be identified multiple times through ICMP,SNMP, and vCenter, only one device is created. This device represents the ESX host or virtual machine.
Once the ESX and VM devices are created, Data Aggregator begins polling any vCenter specific metrics, and can discover and begin polling more components that are identified through the SNMP agent.
Depending on the source of the metric data, some polling for the VMs and ESX is done by direct polling on the device, while the VCAIM is polled to collect other data.
By default, every 15 minutes, after Data Aggregator discovers your VMware environment, it monitors for virtual machines that have been added or removed, or VMotioned between ESX hosts. By default, every 24 hours, Data Aggregator also monitors for ESX hosts that have been added or removed.
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