There can be legitimate cases where access to external storage, such as massive tape libraries, massive disk archives is needed to some, but not all VMs running in a Nutanix cluster. These VMs would be ideally under the AHV hypervisor, but is ESXi is an acceptable alternative. These external storage systems would likely support 10GbE iSCSI (and faster) and/or 8 gbit fibre channel or faster.
I understand that supporting such external access would make the VM “special” and would restrict VM mobility to other specific nodes that were configured for similar external access. The mobility issues are a later discussion, if external storage access is possible.
If the external storage was a NAS device, running NFS and/or SMB, I believe it would be straigntforward … just define the external IP address in the VM, and access the data from the VM. The same technique could be used for external iSCSI devices, for Ethernet iSCSi.
In many cases, if the external storage needed very high performance access, I would assume that a dedicated NIC or fiber channel controller would be added to the node, used exclusively by the VMs accessing the external storage.
I understand that such an external storage connection violates the precepts of HCI computing. However … in the support for customer “choice” … not all customers may want to migrate their external storage to native Nutanix … or in some cases, it might not be financially attractive … with a multi-thousand disk or tape cold storage archive.
Assuming external storage access is possible, where in the AHV documentation can I find the details?
Thank you for your help.
Best answer by vkumarjr
Understood the requirement, however Nutanix does not recommend connecting 3rd party storage devices as this can have a negative effect on system stability and may result in unexpected downtime.
Nutanix installations are meant to only manage local storage resources and uses settings for storage optimization which may be incompatible with 3rd party storage devices.
Note: 3rd party storage should not be connected to a Nutanix system as it can cause outages because APD is disabled.
Would like to share following KB which has above details
3rd party storage might cause issues on a Nutanix system
And because of above recommendation there is no / not much AHV documentation available.