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vanquisher
vanquisher

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Setup NFS server-client in Centos 7.

#linux #nfs #centos #filesharing

In this blog, I will answer some basic questions about NFS and explain how to setup NFS server-client.

What is NFS ?

Network File System(NFS) is a distributed file system protocol, to share the files and folders between the Linux/Unix systems.

Why is it used ?

To share files. Since mounting of filesystem is possible,
NFS-Client can access the files of NFS-Server as like the local files.

How to setup NFS ?

Since it's like a client-server model, we need to setup server and client individually.

Setup NFS-server

In this post, we are doing it in Centos, which uses yum as the package manager.
1.Installing nfs-utils

sudo su - yum install nfs-utils
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2.Choose the directory to share. If not present create one.

mkdir /var/nfs_share_dir
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3.Add permissions and ownwership privilages to the shared directory.

chmod -R 755 /var/nfs_share_dir chown nfsnobody:nfsnobody /var/nfs_share_dir
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4.Start the nfs services.

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
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5.Configuring the exports file for sharing.
Open the exports file and add these lines.

vi /etc/exports
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Fill in the the file-shared path and clients details in /etc/exports.
192.168.48.101 - Client's IP

/var/nfs_share_dir 192.168.48.101(rw,sync,no_root_squash)
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6.Restart the service

systemctl restart nfs-server
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7.Only for Centos 7,NFS service override

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
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Setup NFS-Client(s)

1.Installing nfs-utils

sudo su - yum install nfs-utils
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2.Create a mount point

mkdir -p /mnt/nfs/var/nfs_share_dir
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3.Mounting the filesystem

mount -t nfs 192.168.48.100:/var/nfs_share_dir /mnt/nfs/var/nfs_share_dir -t type of filesystem 192.168.48.100 server's IP
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4.Verify if mounted

$ df -kh Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 39G 1.1G 38G 3% / devtmpfs 488M 0 488M 0% /dev tmpfs 494M 0 494M 0% /dev/shm tmpfs 494M 6.7M 487M 2% /run tmpfs 494M 0 494M 0% /sys/fs/cgroup /dev/mapper/centos-home 19G 33M 19G 1% /home /dev/sda1 497M 126M 372M 26% /boot 192.168.48.100:/var/nfs_share_dir 39G 980M 38G 3% /mnt/nfs/var/nfs_share_dir
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5.Mounting permanently.
Now if the client is rebooted, we need to remount again. So, to mount permanently,we need to configure /etc/fstab file.
Append this to /etc/fstab

192.168.48.100:/var/nfs_share_dir /mnt/nfs/var/nfs_share_dir nfs defaults 0 0
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To verify, create a file in the Client-side, and open in server-side.

Client-side(192.168.48.101)

echo "Client Hello" >> /mnt/nfs/var/nfs_share_dir/testing.txt
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Server-side(192.168.48.100)

$ cat /var/nfs_share_dir/testing.txt Client Hello
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Hurray! Now client is able to access the files of server.
Credits : https://linuxodisha.wordpress.com/

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