Linux Centosvmware NFS Introduction, NFS server-side installation configuration, NFS configuration options

First, the Introduction of NFS

NFS is an abbreviation for the network File system

NFS was first developed by Sun, 2,3,4 three editions, 2 and 3 were drafted by Sun, and 4.0 began to be involved and led by NetApp, with the latest version of 4.1

NFS data transfer is based on RPC protocol, RPC is a shorthand for remote Procedure call.

The NFS Application scenario is: A,b,c three machines need to ensure that the files are accessed is the same, a shared data out, B and C respectively to mount A shared data directory, so B and C access to the data and a consistent

NFS schematic diagram

Second, NFS server-side installation configuration

Yum install-y nfs-utils rpcbind Host Installation

Sub-machine installation

Yum Install-y nfs-utils

Vim/etc/exports//Add the following:

/home/nfstestdir assigning IP to a secondary machine

192.168.1.106/24 (rw,sync,all_squash,anonuid=1000,anongid=1000)

After you save the configuration file, perform the following preparation actions

Mkdir/home/nfstestdir

chmod 777/home/nfstestdir

Systemctl Start Rpcbind

Systemctl Start NFS

Systemctl Enable Rpcbind

Systemctl Enable NFS Host server boot

Systemctl Disable NFS

Three, NFS configuration options

RW Read/write

RO Read Only

Sync sync mode, memory data is written to disk in real time

Async non-synchronous mode

No_root_squash Client Mounts NFS shared directory, the root user is not constrained and permissions are large

Root_squash with the above option, the root user on the client receives a constraint that is limited to a normal user

All_squash all users on the client are limited to an ordinary user when using the NFS shared directory

Anonuid/anongid is used with the above options to define the UID and GID of the qualified user

Client-side Secondary machine mount

Yum Install-y nfs-utils

SHOWMOUNT-E 192.168.1.101//IP for NFS server host IP

Error, network is not through, firewall caused

Both the host and the client are shutting down the firewall

Systemctl Stop Firewalld

Setenforce 0

Client again showmount-e 192.168.1.101

Host Showmount-e 192.168.1.106

The client mounts the/home/nfstestdir directory to the host/MNT directory

Mount-t NFS 192.168.1.101:/home/nfstestdir/mnt Mount

Df-h can see the server-side shared directory/mnt

Touch/mnt/aminglinux.txt

Ls-l/mnt/aminglinux.txt//You can see that both the owner and the group of the file are 1000

Linux centosvmware NFS Introduction, NFS server-side installation configuration, NFS configuration options