One 、NFS Service concept

NFS It's based on TCP/IP Transmitted network file system protocol . By using NFS agreement , The client can access the shared resources in the remote server as if it were a local directory .
For most load balanced clusters , Use NFS Protocol to share data storage is a common practice ,NFS It's also NAS A protocol that storage devices must support . But because of NFS There is no user authentication mechanism , And the data is transmitted in clear text on the network , So the security is very poor , Generally, it can only be used in LAN .

Two 、NFS Service dependent packages

NFS The implementation of a service depends on RPC（Remote Process Call, Remote procedure call ） Mechanism , Mapping to the local process . So you need to install nfs-utils、rpcbind software package To provide NFS Contributing services , Former used NFS Share publishing and access , The latter is used RPC Support .

3、 ... and 、NFS To configure

NFS The configuration file is /etc/exports
The format is ：
Shared directory location Client address （ Permission options ）

1. install nfs-utils、rpcbind software package

2. Set up shared directory

Create a shared directory , Give permission to share directories

Shared directory location Client address （ Permission options ）


The client address can be the host name 、IP Address 、 Segment address , Allow to use "*“、”?" wildcard .
rw Allow reading and writing ,ro Represents read-only
sync： Write to memory and hard disk synchronously
no_root_squash： Indicates that the client is represented by root Identity access is given to local people root jurisdiction （ The default is root_squash）
root_squash： Indicates that the client uses root When users access the shared directory , take root Users are mapped to anonymous users

3. start-up rpcbind and nfs service

start-up rpcbind、nfs service , Set to boot

Check whether the port is on

Check out the nfs share directory

Four 、 verification

Open another host to check 131 Shared directory of address

Create a directory for the shared directory to mount

mount

Set as permanently mounted

stay data Create files in directory , Verify whether

Generate files in the shared directory

summary

This article mainly talks about NFS Installation steps of , Install first nfs and rpcbind Software , Then modify the configuration file to set the sharing , Then create a shared directory , Finally, open the service , The client can access the shared directory .