General Information

Configuring a NFS Server/Client.

The following virtual machines will be used:

• server1.example.com (192.168.1.150) → Perform all NFS client tests from here
• server2.example.com (192.168.1.151) → Install the NFS server here

Install required package

yum install nfs-utils

Enable and start services

systemctl enable nfs-server
systemctl start nfs-server

Allow through the firewall

# nfs -> allow mounting
firewall-cmd --permanent --add-service=nfs
firewall-cmd --reload
 
# allow showmount -e <servername>
firewall-cmd --permanent --add-service=rpc-bind
firewall-cmd --permanent --add-service=mountd
firewall-cmd --reload

Find SELinux boolean nfs export

getsebool -a | grep nfs_export

Set SELinux booleans to on if they are not

setsebool -P nfs_export_all_ro=1 nfs_export_all_rw=1

Create the NFS common file and require IDMAPD for file sharing.

vim /etc/default/nfs-common
 
NEED_IDMAPD=YES

• NOT REQUIRED on 7.4: No longer required in RHEL 7.4 (not sure what version this changed in)

Edit the domain in the idmapd.conf file

vim /etc/idmapd.conf
 
DOMAIN = server1.example.com

• Edit domain as required for system
• NOT REQUIRED on 7.4: No longer required in RHEL 7.4 (not sure what version this changed in) due to the default using the domain of the system exporting.

Create directories for exports

mkdir /test1 /test2

Give them the proper SELinux contexts

semanage fcontext -at nfs_t "/test1(/.*)?"
semanage fcontext -at nfs_t "/test2(/.*)?"
restorecon -Rv /test1
restorecon -Rv /test2

Edit export settings

vim /etc/exports
 
/test1  192.168.1.10(rw,no_root_squash)
/test2  192.168.1.10(ro)

Export directories

exportfs -var

• -v → verbose
• -a → all directories
• -r → Re-export all directories. (remove no longer valid entries)

Restart services

systemctl restart nfs-server

Install required package

yum install nfs-utils

Enable and start service

systemctl enable rpcbind
systemctl start rpcbind

Optional: Display the remove NFS server's available mounts

showmount -e 192.168.1.200

Create directories for mounting

mkdir /test1 /test2

Test a manual mount

mount -t nfs -o rw 192.168.1.200:/test1 /test1

Persistent mounts in fstab

vim /etc/fstab
 
192.168.1.200:/test1  /test1  nfs  rw,_netdev  0 0
192.168.1.200:/test2  /test2  nfs  ro,_netdev  0 0