Thank you for taking the time to produce a detailed but also to-the-point article on how to export an NFS share and access it, very grateful! :-D

I’m trying to set up NFS on two computer clusters. Let’s say A and B (new) for each head node in the cluster. Compute nodes A1, A2 shares /home and /data from A, and compute nodes B1, B2 shares /home from B but /data from “A”.

In another word, cluster A, B shares its own /home, but /data of A is shared through the whole cluster A and B. In order to do this, I did set up NFS and IP/Mask with the following way to achieve the goal (All computers are connected to one network switch).

A with one external IP/24 (eht0) and one with 10.0.0.1/16 (eth1). exports setup of A:

/home 10.0.0.0/24(rw,no_subtree_check,fsid=10,no_root_squash)
/data 10.0.0.0/16(rw,no_subtree_check,fsid=11,no_root_squash)

stab of A

/dev/sda1 /data xfs defaults 0 0

A1 IP with 10.0.0.2/16, A2 IP with 10.0.0.3/16 fstab of A1’s

10.0.0.1:/home /home nfs ... 10.0.0.1:/data /data nfs

B with its one external IP/24 (eht0) and one with 10.0.1.1/24 (eth1).

exports setup of B

/home 10.0.1.0/24(rw,no_subtree_check,fsid=13,no_root_squash)

fstab of B

10.0.0.1:/data /data nfs

B1 with 10.0.1.2/24, B2 with 10.0.1.3/24 … 10.0.1.1:/home /home nfs 10.0.0.1:/data /data nfs

I thought my goal can be achieved simply by IP/Mask, but it doesn’t work. I can mount /data of A on B’s compute nodes, but I cannot mount /home of its own B on B’s compute nodes.

How can I set up the network and NFS to achieve my goal?

Hey Pedro, it seems the UFW firewall is not installed on your system, in which case you need to install it using the command:

$ sudo apt install ufw

Then enable it as follows:

$ sudo  ufw enable