Systems and methods for supporting migration of virtual machines accessing remote storage devices over network via nvme controllers

A system to support migration of virtual machines (VMs) accessing a set of remote storage devices over a network via non-volatile memory express (NVMe) controllers, comprising:

• a first virtual NVMe controller running on a first physical NVMe controller, which in operation, is configured to:
• enable a first VM running on a first host to access and perform a plurality of storage operations to one or more logical volumes in one or more NVMe namespaces created and mapped to the remote storage devices over the network as if they were local storage volumes following a storage network protocol;
• said first host, which in operation, is configured to:
• put the first virtual NVMe controller currently serving the first VM into a quiesce state when the first VM is being migrated from the first host to a second VM running on a second host;
• capture and save an image of states of the first virtual NVMe controller on the first host;
• create a second virtual NVMe controller on a second physical NVMe controller using the saved image, wherein the second virtual NVMe controller is configured to serve the second VM and has exactly the same states as the first virtual NVMe controller in the quiesce state;
• said second virtual NVMe controller running on the second physical NVMe controller, which in operation, is configured to:
• initiate and/or resume the storage operations to the logical volumes mapped to the remote storage devices without being interrupted by the migration of the first VM running on the first host to the second VM running on the second host.