(1) On the NFS server side:

    $ cat /etc/exports
    /home/kashyap   *(rw,syn,no_root_squash)


(2) Mount an NFS share w/ Nova specific SELinux context :

    $ mount --verbose -t nfs xx.yy.www.zzz:/home/kashyap \
      /mnt -o "context=unconfined_u:object_r:nova_var_lib_t:s0"


(3) Set appropriate permissions on the mount point:

    $ chown -R nova: /mnt/nova/
    $ chgrp -R qemu /mnt/nova/instances/
    $ chmod -R g+w /mnt/nova/instances


(4) Ensure to have nova own the QEMU instances invoked by:

    $ grep nova /etc/libvirt/qemu.conf
    user = "nova"
    group = "nova"


(5) Restart all 'running' OpenStack services (or use 'openstack-service'
    command, if you want to do it more elgantly):

   $ for i in `systemctl list-unit-files --type=service \
        | grep -i openstack | grep -i enabled | \                                                                                                                                             
        awk '{print $1}'`; do systemctl restart $i ; done


(6) Ensure your instances are indeed owned by Nova:

    $ ps -ef | grep -i qemu-system-x86 | grep -i nova