The Citrix Hypervisor-Nutanix Integration feature enables Citrix Hypervisor customers to reap Nutanix’s hyper-converged infrastructure (HCI) benefits such as linear scalability and reduced complexity. This feature also allows Nutanix customers to deploy Citrix Hypervisor on the Nutanix HCI platform. You can take advantage of the mature, fully featured, and highly optimized integration of Citrix Hypervisor into the wider Citrix stack. That stack includes Citrix Virtual Apps and Desktops with both MCS and PVS, and App Disks. Additionally, Nutanix customers can also benefit from the unique selling points of Citrix Hypervisor such as:
Leading graphics virtualization solution
Automated delivery of I/O drivers through Windows Update
Support for Containers
PVS Read Cache
Advanced threat detection using Direct Inspect APIs
Customers can use the Nutanix Prism web console to configure your storage and clusters (pools), and to monitor the HCI platform, including the VM storage. Managing the Citrix Hypervisor and performing VM lifecycle operations can be done using XenCenter.
- Citrix Hypervisor-Nutanix Integration applies only to Nutanix servers, and to certified servers running the Nutanix stack. For a list of supported servers, see the Hardware Compatibility List.
- This guide serves as an auxiliary document to complement the Citrix Hypervisor on Nutanix Administration Guide.
- Every Citrix Hypervisor release requires a compatible Nutanix release to enable the Citrix Hypervisor-Nutanix Integration feature. For information about compatible releases, see the Citrix Hypervisor on Nutanix Administration Guide.
Compatibility requirements and caveats
With the tight integration of Nutanix with Citrix Hypervisor, the following Citrix Hypervisor features do not apply to the Nutanix HCI deployments:
Storage live migration - Storage live migration enables the movement of a VM’s storage from one Storage Repository (SR) to another. However, Nutanix enables the aggregation of storage for an entire cluster.
Disaster Recovery (DR) - The DR feature in Citrix Hypervisor is based on array-level mirroring that is not applicable in Nutanix deployments.
WLB Power Management - Within HCI environments, the removal of any hardware has to be tightly managed. This removal is orchestrated through the Nutanix Prism UI, hence the Power Management feature in Citrix Hypervisor Workload Balancing (WLB) is not permissible for Nutanix deployments.
SRs - HCIs mandate their own SR, simplifying the choice of SR type. Local, NFS, iSCSI, Hardware HBA, SMB/CIFS, and Software FCoE are not available. However, ISO libraries are supported.
IntelliCache - The IntelliCache feature in Citrix Hypervisor does not apply as Nutanix storage already ensures data locality.
XenCenter Automated Updates – The host-aggregated clustered storage requires that hosts are restarted in a specific sequence. When using the XenCenter Install Tools wizard, the Automated Updates option is not available. Instead choose to Download update or new version from Citrix or to Select update or supplemental pack from disk. After you have installed the updates, use the Nutanix Prism console to trigger a Rolling Pool Restart if a restart is required. This process ensures that the restarts occur in the correct sequence.
In addition, the following limitations also apply when using Citrix Hypervisor on Nutanix:
The concept of ‘cluster’ in Nutanix maps to the concept of ‘pool’ in Citrix Hypervisor. This mapping means that the cluster size is limited to a maximum 64 hosts per cluster.
High availability can only accommodate a single host failure (assuming there are at least three hosts in a cluster). This limit is only enforced in XenCenter.
Customers must use OVS as the network back-end. Linux Bridge is not supported.
The Citrix Hypervisor VSS provider that enables quiesced snapshots is not applicable as the integration is based on Nutanix native snapshot format.
Use the Nutanix Prism web console to configure storage and cluster infrastructure and to monitor the HCI platform, including the VM storage. Managing the Citrix Hypervisor and performing VM lifecycle operations can be done using XenCenter.
Use the Nutanix Prism console to manage host membership in the cluster and pool. The options for pool-join and -eject are disabled on the Citrix Hypervisor user interfaces. This recommendation is because hosts in the Citrix Hypervisor pool must match the hosts in the Nutanix cluster.
The Nutanix software stack runs inside a privileged VM called the Controller VM (CVM) on each host. Similar to the Citrix Hypervisor Control Domain (dom0), the CVM domain is visible in CLI and in XenCenter on the Nutanix CVM Console tab of the host. The Controller VM is not displayed as a VM in XenCenter.
To modify the memory allocated to the Controller VM：
Depending on the Nutanix features you use, you can choose to modify the memory allocated to the Controller VM. Run the following command on the Controller VM to modify the memory allocation:
xe vm-memory-limits-set uuid=<CVM UUID static-min=10GiB dynamic-min=10GiB dynamic-max=10GiB static-max=10GiB
Restart the host for the changes to take effect.