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Deploy NFS Service

This document will show you how to simply deploy the NFS shared storage service on your Kubernetes cluster with an example.

Install NFS Server

Choose one of your nodes to install the NFS service, assuming our shared data directory is: /data/k8s

  1. Turn off the firewall (requires sudo privileges)
$ systemctl stop firewalld.service

$ systemctl disable firewalld.service
  1. Install and configure NFS
$ yum -y install nfs-utils rpcbind
  1. Set permissions for the shared directory:
$ chmod 755 /data/k8s/
  1. Configure NFS. The default configuration file for NFS is under /etc/exports. Add the following configuration information to the file:
$ vi /etc/exports
/data/k8s  *(rw,sync,no_root_squash)
  1. Start rpcbind service:
$ systemctl start rpcbind.service

$ systemctl enable rpcbind

$ systemctl status rpcbind
···
Sep 16 10:27:19 master systemd[1]: Started RPC bind service.

If you see the above output, the rpcbind is successfully started.

  1. Start NFS service:
$ systemctl start nfs.service

$ systemctl enable nfs

$ systemctl status nfs
···
Sep 16 10:28:01 master systemd[1]: Started NFS server and services.

If you see the above output, the NFS server is successfully started.

It can also be confirmed by the following command:

$ rpcinfo -p | grep nfs
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    100227    3   tcp   2049  nfs_acl
    100003    3   udp   2049  nfs
    100003    4   udp   2049  nfs
    100227    3   udp   2049  nfs_acl

So here we have the NFS server installed, then we install the NFS service on the other nodes.

Install NFS Clients

Install NFS on the other nodes of your Kubernetes cluster:

  1. Turn off the firewall first:
$ systemctl stop firewalld.service

$ systemctl disable firewalld.service
  1. Install NFS
$ yum -y install nfs-utils rpcbind
  1. As with the above method, start rpc first, then start NFS:
$ systemctl start rpcbind.service 

$ systemctl enable rpcbind.service 

$ systemctl start nfs.service    

$ systemctl enable nfs.service
  1. After the client startup is complete, check if NFS has a shared directory:
$ showmount -e 192.168.130.32
Export list for 192.168.130.32:
/data/k8s *

Where 192.168.130.32 is the node IP where your NFS server is located.

For further verification operations, please see NFS Storage Preparation Document