Virtual Machines – Acropolis Test
Live migration is supported on an Acropolis Hypervisor (AHV) cluster. Live migration is the ability to move a running VM from one host (node) to another in the same cluster, without any downtime or loss of connectivity. Live migration can be initiated manually or automatically. While manual migration can be initiated via the Prism interface, automatic VM migration is triggered by the Acropolis Dynamic Resource Scheduler or the VM High Availability (VMHA) capability of an Acropolis cluster. The scheduler monitors each individual node's CPU and memory utilization. In the event where a node's CPU allocation breaches its threshold (currently 85% of host CPU), the scheduler automatically migrates VMs off that host to re-balance the workload. VMHA, if enabled for a cluster, ensures that critical VMs are automatically restarted on another Acropolis Hypervisor (AHV) host in the cluster if a host fails.
Where migration is automatic, administrators may want to keep close track of VM movement, so that they can accurately tell on which host a VM is operating at a given point in time. The Virtual Machines - Acropolis test provides administrators with this insight. This test indicates whether any guests have migrated to or from the virtual server, and if so, which ones are those. In addition, the test also enables administrators to determine how many guests have registered with the Acropolis server, and how many of these are currently running. Additionally, for VDI environments, the test reports the number and names of VMs with users logged in and the ones without any users logged in; this way, unused VMs that are unnecessarily hogging resources.
Target of the test : A Nutanix Acropolis server
Agent deploying the test : A remote agent
Outputs of the test : One set of results for the Nutanix Acropolis server monitored.
|
Measurement | Description | Measurement Unit | Interpretation |
---|---|---|---|
Total VMs |
Indicates the total number of VMs that have been registered with the Nutanix Prism. |
Number |
To know which VMs are registered with the Prism, use the detailed diagnosis capability of this measure (if enabled). Note that detailed metrics will be available for this measure only if the DD FOR TOTAL VMS flag is set to Yes. |
Powered on VMs |
Indicates the number of VMs that are currently powered on. |
Number |
To know which are the VMs that are powered on, use the detailed diagnosis capability of this measure (if enabled). |
Powered off VMs |
Indicates the number of powered off VMs on the monitored hypervisor. |
Number |
|
Suspended VMs |
Indicates the number of VMs that are currently suspended. |
Number |
|
VMs with users |
Indicates the number of powered on guests with users logged in. |
Number |
To know which guests the users have logged into, use the detailed diagnosis capability of this measure (if enabled). Note that this measure will not be available for the Nutanix Acropolis model. |
Guests without users |
Indicates the number of powered on guests without any users logged in. |
Number |
Note that this measure will not be available for the Nutanix Acropolis model. |
Added VMs |
Indicates the number of VMs that were newly added to the Nutanix Acropolis server during this measurement period. |
Number |
The detailed diagnosis of these measures, if enabled, lists the virtual machines that were migrated to or from (as the case may be) the Nutanix Acropolis server. |
Removed VMs |
Indicates the number of VMs that were newly removed from the Nutanix Acropolis server during this measurement period. |
Number |
The detailed diagnosis of the Powered on VMs measure, provides the complete list of VMs that are currently powered on.
Figure 1 : The detailed diagnosis of the Powered on VMs measure of a Nutanix Acropolis server
The detailed diagnosis of the Added VMs measure displays the IP address and operating system of those VMs that were recently migrated to the host.
Figure 2 : The detailed diagnosis of the Added VMs measure
The detailed diagnosis of the Removed VMs measure displays the IP address and operating system of the VMs that were recently removed/migrated from the host.
Figure 3 : The detailed diagnosis of the Removed VMs measure