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This article is about how to use PowerShell Cmdlet to check the health status of Hyper-V Replica. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

If there is a problem with the copy or if you see the "danger" or "warning" health status of any virtual machine, you can use Measure-VMReplication cmdlet to get the copy health statistics.

Both Get-VMReplication and Measure-VMReplication cmdlet support the-ComputerName parameter, which obtains replica health data from a remote Hyper-V server. This is shown in the following figure.

In addition to-ComputerName, the two cmdlet also support a large number of other parameters. For example, if you only need to display a list of primary virtual machines (the master virtual machine replicates from the primary server to the replica server), you can use the-ReplicationMode parameter with a value of "Primary". As shown in the following figure:

A primary server can also act as a replica server to replicate virtual machines from another primary server, but this is not ideal in a production environment. In such a configuration, in the Mode column, "Primary" represents the primary virtual machine and "Replica" represents the replica virtual machine.

Tip: before starting troubleshooting, it is necessary to know the different modes of the virtual machine. Because the Hyper-V replica is unidirectional (the primary server replicates to the replica server), the replica health must obtain more data from the primary server for further troubleshooting.

Similar to-ReplicationMode, the-ReplicationState parameter allows you to check the status of a specific copy. For example, you can use the following command to get all unreplicated virtual machines or virtual machines with a replica status of "error":

As you can see in the screenshot above, the Get-VMReplication command lists only virtual machines with a copy status of "error". You can also specify other copy states with the-ReplicationState parameter. And the-ReplicationState parameter. The virtual machine has the following replica status:

Error: this status will be displayed if the virtual machine is no longer replicating or if an error occurs.

FailOverWaitingCompletion: this status indicates that the failover is still in progress.

FailedOver: this state indicates that the failover of the virtual machine is complete.

NotApplicable: this state indicates that the virtual machine is not using a copy of Hyper-V.

ReadyForInitialReplication: this state indicates that the virtual machine has an Hyper-V replica enabled, but the original copy is incomplete. The replica status usually shows the primary server or primary virtual machine.

Replicating: indicates that virtual machine replication is working properly.

Resynchronizing: the second synchronization event is triggered by the administrator or automatically.

ResynchronizeSuspended: the secondary synchronization process is aborted.

Suspended: virtual machine paused. In other words, the replication process is paused.

SyncedReplicationComplete: the secondary synchronization of the virtual machine is completed successfully.

WaitingForInitialReplication: this state is displayed on the replica virtual machine. This indicates that replication has been enabled for the virtual machine and that a pointer has been created for the virtual machine on the replica server, but the original replication has not been completed. The status of the "ReadyForInitialReplication" copy is displayed on the primary server.

WaitingForStartResynchronize: when a second synchronization is needed, the virtual machine will enter this replication state.

Tip: for any virtual machine participating in Hyper-V Replica, the status column should be "replication" and the "Health" column should be "normal".

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