nfs not working in oci-hpc-2.9.2

[stebo85]

this setting:

leads to this error:

null_resource.cluster (remote-exec): TASK [safe_yum : yum first try] ************************************************
null_resource.cluster (remote-exec): �[0;32mok: [inst-inls6-rich-maggot]�[0m
null_resource.cluster (remote-exec): �[0;32mok: [rich-maggot-bastion]�[0m
null_resource.cluster (remote-exec): TASK [nfs-client : create share directory] *************************************
null_resource.cluster (remote-exec): �[0;33mchanged: [inst-inls6-rich-maggot]�[0m
null_resource.cluster (remote-exec): �[0;33mchanged: [rich-maggot-bastion]�[0m
null_resource.cluster (remote-exec): TASK [nfs-client : Mount NFS with options] *************************************
null_resource.cluster (remote-exec): �[0;36mskipping: [rich-maggot-bastion]�[0m
null_resource.cluster (remote-exec): �[0;36mskipping: [inst-inls6-rich-maggot]�[0m
null_resource.cluster (remote-exec): TASK [nfs-client : Mount NFS without options] **********************************
null_resource.cluster (remote-exec): �[0;31mfatal: [inst-inls6-rich-maggot]: FAILED! => changed=false �[0m
null_resource.cluster (remote-exec): �[0;31m  msg: |-�[0m
null_resource.cluster (remote-exec): �[0;31m    Error mounting /app: mount.nfs: an incorrect mount option was specified�[0m
null_resource.cluster (remote-exec): �[0;31mfatal: [rich-maggot-bastion]: FAILED! => changed=false �[0m
null_resource.cluster (remote-exec): �[0;31m  msg: |-�[0m
null_resource.cluster (remote-exec): �[0;31m    Error mounting /app: mount.nfs: an incorrect mount option was specified�[0m
null_resource.cluster (remote-exec): PLAY RECAP *********************************************************************
null_resource.cluster (remote-exec): �[0;31minst-inls6-rich-maggot�[0m     : �[0;32mok=51  �[0m �[0;33mchanged=34  �[0m unreachable=0    �[0;31mfailed=1   �[0m �[0;36mskipped=71  �[0m rescued=0    ignored=0
null_resource.cluster (remote-exec): �[0;31mrich-maggot-bastion�[0m        : �[0;32mok=112 �[0m �[0;33mchanged=74  �[0m unreachable=0    �[0;31mfailed=1   �[0m �[0;36mskipped=116 �[0m rescued=0    �[1;35mignored=1   �[0m
Error: remote-exec provisioner error
  with null_resource.cluster,
  on bastion.tf line 401, in resource "null_resource" "cluster" 
 401:   provisioner "remote-exec" {
error executing "/tmp/terraform_800757839.sh": Process exited with status 2