Network File Sharing (NFS) is a protocol that allows you to share directories and files with other Linux clients over a network. Shared directories are typically created on a file server, running the NFS server component. Users add files to them, which are then shared with other users who have access to the folder. An NFS file share is mounted on a client machine, making it available just like folders the user created locally. NFS is particularly useful when disk space is limited and you need to exchange public data between client computers.
Below are the high-level steps we will follow to set up our NFS.
1. Install and activate nfs server on NFS Server
2. Create the NFS Share Folder and export it
3. Install nfs client and mount the NFS Share Folder on Client
Below are setup details and the same will be used in this demonstration.
| Sr. No. | Hostname | IP | Role |
| 1 | test-machine01 | 192.168.114.177 | NFS Server |
| 2 | test-machine02 | 192.168.114.176 | NFS Client |
Step 1. Install and activate NFS Server: Install NFS Server using OS yum command. Once installation is done enable nfs service and add port in firewall using below commands.
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[root@test-machine01 u01]# yum -y install nfs-utilsLoaded plugins: langpacks, ulninfoRepository ol7_UEKR5 is listed more than once in the configurationDependencies Resolved============================================================================================================================================================================================== Package Arch Version Repository Size==============================================================================================================================================================================================Updating: nfs-utils x86_64 1:1.3.0-0.68.0.1.el7.1 ol7_latest 412 kTransaction Summary==============================================================================================================================================================================================Upgrade 1 PackageUpdated: nfs-utils.x86_64 1:1.3.0-0.68.0.1.el7.1Complete![root@test-machine01 u01]#[root@test-machine01 psql_backup]# systemctl enable nfs-server.serviceCreated symlink from /etc/systemd/system/multi-user.target.wants/nfs-server.service to /usr/lib/systemd/system/nfs-server.service.[root@test-machine01 psql_backup]# systemctl start nfs-server.service[root@test-machine01 psql_backup]#[root@test-machine01 psql_backup]# systemctl status nfs-server.serviceâ nfs-server.service - NFS server and services Loaded: loaded (/usr/lib/systemd/system/nfs-server.service; enabled; vendor preset: disabled) Active: active (exited) since Sun 2021-08-15 10:01:55 +03; 39s ago Process: 63520 ExecStartPost=/bin/sh -c if systemctl -q is-active gssproxy; then systemctl reload gssproxy ; fi (code=exited, status=0/SUCCESS) Process: 63506 ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS (code=exited, status=0/SUCCESS) Process: 63504 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=0/SUCCESS) Main PID: 63506 (code=exited, status=0/SUCCESS) CGroup: /system.slice/nfs-server.serviceAug 15 10:01:54 test-machine01 systemd[1]: Starting NFS server and services...Aug 15 10:01:55 test-machine01 systemd[1]: Started NFS server and services.[root@test-machine01 psql_backup]#[root@test-machine01 psql_backup]# firewall-cmd --permanent --add-service=nfssuccess[root@test-machine01 psql_backup]# firewall-cmd --reloadsuccess[root@test-machine01 psql_backup]# |
Step 2. Create the NFS Share Folder and export it on NFS Serve: We will be using /u01/psql_backup directory as our NFS share. Edit nfs configuration file: /etc/exports and add the below line.
*: This mount has access to any system in the Network
rw: Read Write
sync: Any update in file from the Client-side and it will update in Server also.
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[root@test-machine01 psql_backup]# mkdir /u01/psql_backup[root@test-machine01 psql_backup]#[root@test-machine01 psql_backup]# chown postgres:postgres /u01/psql_backup[root@test-machine01 psql_backup]#[root@test-machine01 psql_backup]# vi /etc/exports/u01/psql_backup *(rw,sync):wq![root@test-machine01 psql_backup]# cat /etc/exports/u01/psql_backup *(rw,sync)[root@test-machine01 psql_backup]#[root@test-machine01 psql_backup]# exportfs -a[root@test-machine01 psql_backup]# |
Step 3. Install NFS client and mount the NFS Share Folder on NFS Client: Use OS yum command to install nfs package. Once the package is installed, you can use the command showmount to search for available NFS Server. Add NFS Share details in /etc/fstab so each time Server mount NFS drive automatically during server reboot.
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[root@test-machine02 etc]# yum -y install nfs-utilsLoaded plugins: langpacks, ulninfoDependencies Resolved============================================================================================================================================================================================== Package Arch Version Repository Size==============================================================================================================================================================================================Installing: nfs-utils x86_64 1:1.3.0-0.68.0.1.el7.1 ol7_latest 412 kInstalling for dependencies: gssproxy x86_64 0.7.0-30.el7_9 ol7_latest 110 k keyutils x86_64 1.5.8-3.el7 ol7_latest Installed: nfs-utils.x86_64 1:1.3.0-0.68.0.1.el7.1Transaction Summary==============================================================================================================================================================================================Install 1 Package (+10 Dependent packages)Dependency Installed: gssproxy.x86_64 0:0.7.0-30.el7_9 keyutils.x86_64 0:1.5.8-3.el7 libbasicobjects.x86_64 0:0.1.1-32.el7 libcollection.x86_64 0:0.7.0-32.el7 libevent.x86_64 0:2.0.21-4.el7 libini_config.x86_64 0:1.3.1-32.el7 libnfsidmap.x86_64 0:0.25-19.el7 libpath_utils.x86_64 0:0.2.1-32.el7 libref_array.x86_64 0:0.1.5-32.el7 libverto-libevent.x86_64 0:0.2.5-4.el7Complete![root@test-machine02 etc]#[root@test-machine02 etc]#[root@test-machine02 etc]# showmount -e test-machine01Export list for test-machine01:/u01/psql_backup *[root@test-machine02 etc]#[root@test-machine02 u01]#[root@test-machine02 u01]# vi /etc/fstabtest-machine01:/u01/psql_backup /u01/psql_backup nfs rw,sync,hard,intr 0 0:wq![root@test-machine02 u01]#[root@test-machine02 u01]# cat /etc/fstabtest-machine01:/u01/psql_backup /u01/psql_backup nfs rw,sync,hard,intr 0 0[root@test-machine02 u01]#[root@test-machine02 u01]# mkdir /u01/psql_backup[root@test-machine02 u01]#[root@test-machine02 u01]# chown postgres:postgres /u01/psql_backup[root@test-machine02 u01]#[root@test-machine02 u01]# mount /u01/psql_backup[root@test-machine02 u01]#[root@test-machine02 u01]# df -h /u01/psql_backupFilesystem Size Used Avail Use% Mounted ontest-machine01:/u01/psql_backup 60G 42G 19G 69% /u01/psql_backup[root@test-machine02 u01]# |