Convert glusterfs volume to nfs volume

We wanted to move from glusterfs storage to nfs storage. however we have huge data on flusterfs pv and we dont want to lose data. Please let me know if there is any way to convert this pv to nfs pv.

Cluster information:

Kubernetes version: v1.5.2
Cloud being used: bare-metal
Installation method: Kubernetes ansible installation
Host OS: Centos 7