Server Side Config

1.) First install nfs-utils

yum -y install nfs-utils



2.) Configure nfs share

Create a directory for your NFS share

mkdir /datastore

Create your NFS share in /etc/exports

echo "/datastore 10.220.101.0/24(rw,sync,no_root_squash)" >> /etc/exports
systemctl restart nfs


/etc/exports is where all NFS shares are defined

Allowed Client IP Range = 10.220.101.0/24

Read and Writing Allowed = rw

no_root_squash = makes it so the default of nobody is not used on the NFS share as a user (not secure in normal environments with user access but it makes sense for our situation)

sync = a good idea because otherwise the nfs server will reply to requests for unwritten/unstable data which can lead to corruption and data loss potentially.

Client Side

yum -y install nfs-utils

mount 10.10.2.20:/tmp/nfsmount /mnt/nfs/

IP of NFS Server = 10.10.2.20

NFS Share = /tmp/nfsmount

Local Mount Path = /mnt/nfs

Make it permanent with fstab

10.10.2.20:/tmp/nfsmount /mnt/nfs nfs defaults 0 0

Troubleshooting

Most issues are a result of a few things.

1. You can't mount because nfs-utils was not installed on the client side.
2. The IP range you specified is incorrect or invalid (if you are using NAT absolutely verify what the source IP from your client looks like to the server).
3. Insecure ports issue if you are using NAT (you should set the "insecure" option

 rpc.mountd: refused mount request from somehostname.com for /some/path (/a/path/): illegal port 59201

If you get the above error you are probably using NAT somewhere between the client and server.  NAT mapping ends up resulting in high and so-called "insecure" ports to be used (I guess the fact that they are unprivileged and a non-root user could easly sniff or intercept on those ports). However if that's not a concern you modify your exports line like this:

/datastore 10.220.101.0/24(insecure,rw,sync,no_root_squash)

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