My test systems are CentOS 7.4 with the following info:

NFS Server = 192.168.178.31
NFS Client = 192.168.178.32

[root@osradar ~]# uname -a
Linux osradar 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[root@osradar ~]# cat /etc/centos-release
CentOS Linux release 7.4.1708 (Core)
[root@osradar ~]#

I-Install NFS Utils

“nfs-utils” includes all the needed services to build your NFS server. Let’s install it with the following commands:

yum install nfs-utils

Installed:
 nfs-utils.x86_64 1:1.3.0-0.48.el7

Dependency Installed:
 gssproxy.x86_64 0:0.7.0-4.el7 keyutils.x86_64 0:1.5.8-3.el7 libbasicobjects.x86_64 0:0.1.1-27.el7
 libcollection.x86_64 0:0.6.2-27.el7 libevent.x86_64 0:2.0.21-4.el7 libini_config.x86_64 0:1.3.0-27.el7
 libnfsidmap.x86_64 0:0.25-17.el7 libpath_utils.x86_64 0:0.2.1-27.el7 libref_array.x86_64 0:0.1.5-27.el7
 libtirpc.x86_64 0:0.2.4-0.10.el7 libverto-libevent.x86_64 0:0.2.5-4.el7 quota.x86_64 1:4.01-14.el7
 quota-nls.noarch 1:4.01-14.el7 rpcbind.x86_64 0:0.2.0-42.el7 tcp_wrappers.x86_64 0:7.6-77.el7

Complete!
[root@osradar ~]#

Now, create the directory for NFS service to share:

mkdir /var/nfs_share

Change the permissions of the shared folder:

chmod -R 755 /var/nfs_share
chown nfsnobody:nfsnobody /var/nfs_share

Let’s enable and start the services to make “nfs_share” accessible later and make them bootable on the next reboot.

systemctl enable rpcbind
 systemctl enable nfs-server
 systemctl enable nfs-lock
 systemctl enable nfs-idmap
 systemctl start rpcbind
 systemctl start nfs-server
 systemctl start nfs-lock
 systemctl start nfs-idmap

We will configure NFS directory over the network with the next step:

vi /etc/exports

and add

/var/nfs_share 192.168.178.32(rw,sync,no_root_squash,no_all_squash)

192.168.178.32 is the IP of NFS client machine. If you wish to all local network, use 192.168.178.0/24  or  “*” to allow connection from everywhere.

Restart the NFS service:

systemctl restart nfs-server

Here, add the rules below to allow the connection through the NFS service:

firewall-cmd --permanent --zone=public --add-service=nfs
firewall-cmd --permanent --zone=public --add-service=mountd
firewall-cmd --permanent --zone=public --add-service=rpc-bind
firewall-cmd --reload

Before installing NFS clients, you need to share the folder.

[root@osradar ~]# exportfs
/var/nfs_share 192.168.178.32

II-Install  NFS Client

Run the same command to install all the needed NFS packages.

yum install nfs-utils

Create the NFS directory mount points:

mkdir -p /mnt/var/nfs_share

Next, we will mount the NFS shared directory on the client machine as shown below:

[root@localhost~]# mount -t nfs 192.168.178.31:/var/nfs_share /mnt/var/nfs_share/
[root@localhost~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 17G 1.2G 15G 8% /
devtmpfs 486M 0 486M 0% /dev
tmpfs 497M 0 497M 0% /dev/shm
tmpfs 497M 6.6M 490M 2% /run
tmpfs 497M 0 497M 0% /sys/fs/cgroup
/dev/sda1 1014M 153M 862M 15% /boot
tmpfs 100M 0 100M 0% /run/user/0
192.168.178.31:/var/nfs_share 17G 5.3G 11G 33% /mnt/var/nfs_share
[root@localhost ~]#

We are connected. Now, you have the reading and writing access to the remote folder.

To mount this folder automatically on every boot, please add this line to “/etc/fstab”

192.168.178.31:/var/nfs_share /mnt/var/nfs_share nfs defaults 0 0

Enjoy! Please come back to us if you have any comment, question or suggestion.

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