After the cluster is created, DataKeeper is installed. It is important to install DataKeeper after the initial cluster is created so the custom cluster resource type can be registered with the cluster. If you installed DataKeeper before the cluster was created you will need to run the install again and perform a repair installation.

  1. Install DataKeeper after the cluster is created. During the installation choose all the default options.

  1. The service account used for the login on the VMs must be a domain account created earlier and be in the local administrators group on each node in the cluster.

Once DataKeeper is installed and licensed on each node, reboot the servers.

Create the DataKeeper Volume Resource

  1. To create the DataKeeper Volume Resource, start the DataKeeper UI and connect to both of the servers.

  1. Connect to VM-1.

  1. Connect to VM-2.

  1. Once connection to each server is established, create a DataKeeper volume. Right click on Jobs and choose Create Job.

  1. Add the Job name and Job description.

  1. Choose the Source Server, IP address and Volume. The IP address is whether the replication traffic will travel.

  1. Choose the Target Server.

  1. Choose your options. Synchronous replication should be chosen for two VMs in the same geographic region. For cross-region replication, the asynchronous option should be used. Compression can also be enabled for large distances, or when high latency is observed between the VMs.

By clicking yes on the last dialog, a new DataKeeper Volume Resource will be registered in Failover Cluster. By default new DataKeeper Volume resources are placed in the Available Storage group.

  1. A DataKeeper Volume Resource can be seen in Available Storage.

Create the File Server Cluster Resource

Use PowerShell to create the Failover Server Cluster Resource instead of the Failover Cluster interface. The virtual machines are configured to use DHCP, and the GUI based wizard will not prompt the user to enter the cluster IP address. Instead, it will issue a duplicate IP address. Using a powershell command to create the File Server Cluster Resource and specify the IP address will avoid a duplicate IP address being issued.

Create the Internal Load Balancer

The Azure network stack does not support gratuitous ARPS so clients cannot connect directly to the cluster IP address. Instead, clients connect to an internal load balancer and are redirected to the active cluster node. An internal load balancer can be created through the Azure Portal as shown below.

A Public Load Balancer can be used if your client connects over the public internet but assuming the clients reside in the same Virtual Network, an Internal Load Balancer can be used.

To edit the load balancer after it is created:

  1. Frontend IP configuration.

  1. Add Backend pools. Here we will add two cluster nodes, VM-1 and VM-2 to our backend pool.

  1. Add Health probes. The probe we add will be Port 59999. This probe determines which machine is currently active in our cluster and where the Virtual IP is enabled. Using this
    ILB will route the traffic to the corresponding node.

  1. Add Load balancing rules to redirect the SMB traffic, TCP port 445. Note: Notice that the Floating IP (direct server return) setting is changed. Make sure this option is set to Enabled.

Fix the File Server IP Resource

The final step in the configuration is to run the PowerShell script on one of the cluster nodes. This will allow the Cluster IP Address to respond to the ILB probes and ensure that there is no IP address conflict between the Cluster IP Address and the ILB.

Create File Shares

Create the file shares in Windows Explorer on the active node. Failover Clustering automatically picks up the shares and puts them in the cluster.

A functioning WSFC File Server that spans Availability Zones in Azure is now ready for use.

For additional assistance, pre-sales customers please contact or If you are a post-sales customer please contact the SIOS Support team at If you need additional assistance with this feature, please contact our Professional Services team at


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