Different types of polling for VMware resources
Site24x7 supports monitoring for different VMware resources like vCenter, clusters, ESX/ESXi host, virtual machines (VMs), datastores, resource pools, and snapshots using On-Premise Poller.
You can monitor the discovered VMware child resources using the following:
- VMware vCenter credentials
- VMware ESX/ESXi credentials
VMware vCenter-based polling
Here, you can provide your vCenter credentials, which Site24x7 then uses to monitor all the associated clusters, ESX/ESXi hosts, VMs, datastores, snapshots, resource pools, and hardware sensors. A single credential with the required privileges is enough to discover all the associated resources and perform data collection.
If there are more devices, we will create 'N' parallel connections with vCenter once in every 'M' number of minutes; where 'N' is the number of monitors and 'M' is the poll frequency selected in the monitors.
vCenter-based polling requires On-Premise Poller version 4.6.4 or higher. Please upgrade your On-Premise Poller to the latest version.
VMware ESX/ESXi-based polling
In this case, you must create user credentials at each ESX/ESXi host level and enable the required privileges. This has to be done at the individual ESX/ESXi host level to monitor the ESX/ESXi host and its associated VMs, datastores, and resource pools. Unlike vCenter-based polling, there won't be a load on the vCenter server, as it will distribute the load across individual ESXi hosts.
How to choose between the two?
It is a trade-off between creating users on every ESXi host and placing total traffic on the vCenter server. You can decide whether to go for vCenter-based or ESXi-based polling depending on the monitor count and configured value of parallel connections supported by your vCenter.
Refer to this document to switch between VMware vCenter-based polling and VMware ESX/ESXi-based polling
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