How to create an NFS Server Cluster

November 15, 2023

Sure, here is the English translation of the instructions on how to create an NFS Server Cluster:

How to create an NFS Server Cluster

To create an NFS Server Cluster, follow these steps:

You can install NFS Server on all cluster nodes by running the following command:

apt install nfs-kernel-server

Configure NFS Server on all cluster nodes by editing the /etc/exports file.

/data 192.168.1.0/24(rw,no_root_squash,sync,anonuid=1000,anongid=1000)

In the /etc/exports file, each line specifies the following information:

/data is the directory you want to make available via NFS
192.168.1.0/24 is the network that is allowed to access the NFS server
rw,no_root_squash,sync,anonuid=1000,anongid=1000 are the NFS server configuration options

The NFS server configuration options are as follows:

rw allows read and write access to files
no_root_squash allows root users on client machines to access files on the NFS server
sync forces the NFS server to sync files with client machines immediately
anonuid=1000 assigns the UID of 1000 to anonymous users on client machines
anongid=1000 assigns the GID of 1000 to anonymous users on client machines

Configure NFS Server Cluster by editing the /etc/nfs.conf file.

# Set the cluster name
cluster_name = mycluster

# Set the NFS server list
nfs_server_list = host1 host2 host3

In the /etc/nfs.conf file, each line specifies the following information:

Restart NFS Server on all cluster nodes to make the configuration changes take effect.

systemctl restart nfs-kernel-server

Verify the NFS Server Cluster by running the following command:

showmount -e

If the NFS Server Cluster is configured correctly, you will see the following output:

host1:/data 192.168.1.0/24
host2:/data 192.168.1.0/24
host3:/data 192.168.1.0/24

Example

Suppose you have three cluster nodes named host1, host2, and host3.

If you configure the NFS Server Cluster as follows:

cluster_name = mycluster
nfs_server_list = host1 host2 host3

And you configure the /etc/exports file as follows:

/data 192.168.1.0/24(rw,no_root_squash,sync,anonuid=1000,anongid=1000)

Then, you can access the /data directory on any of the cluster nodes from any client machine on the network 192.168.1.0/24.

Advantages of creating an NFS Server Cluster

Increased performance: An NFS Server Cluster can improve performance by distributing the load across multiple servers.
Increased availability: An NFS Server Cluster can improve availability by providing failover in the event of a server failure.
Increased scalability: An NFS Server Cluster can be scaled to meet the needs of growing organizations.

Disadvantages of creating an NFS Server Cluster

Increased complexity: An NFS Server Cluster is more complex to configure and manage than a single NFS server.
Increased cost: An NFS Server Cluster requires more hardware resources than a single NFS server.

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