/mnt/raidarray clientmachine(rw)

● nfs-server.service - NFS server and services
Loaded: loaded (/lib/systemd/system/nfs-server.service; enabled
Active: active (exited) since Tue 2017-01-17 16:47:38 CST; 26min ago
Main PID: 1520 (code=exited, status=0/SUCCESS)
Tasks: 0 (limit: 4915)
CGroup: /system.slice/nfs-server.service
Jan 17 16:47:38 servermachine exportfs[1511]: exportfs: Failed to resolve clientmachine
Jan 17 16:47:38 servermachine systemd[1]: Started NFS server and services.

[Unit]
Description=Network Manager Wait Online
Documentation=man:nm-online(1)
Requisite=NetworkManager.service
After=NetworkManager.service
Before=network-online.target
[Service]
Type=oneshot
ExecStart=/usr/bin/nm-online -s -q --timeout=30
RemainAfterExit=yes
[Install]
WantedBy=network-online.target

systemctl restart nfs-kernel-server