Wordpress challange exercise in CKAD

I am not able to create volume with nfs . In Wordpress exercise because of nfs required “server” , what host or iP in should give .

the nfs server name is : nfs01, this is in the architecture diagram and is accessible from the worker nodes
master ssh node01 node01 ping nfs01
PING nfs01 ( 56(84) bytes of data.
64 bytes from nfs01 ( icmp_seq=1 ttl=64 time=0.354 ms
64 bytes from nfs01 ( icmp_seq=2 ttl=64 time=0.631 ms
— nfs01 ping statistics —
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.354/0.492/0.631/0.140 ms
node01 $