How to use NFS service to achieve website data synchronization?
How to use NFS service to achieve website data synchronization? This problem may be often seen in our daily work. Through this question, I hope you can gain more. Let's take a look at the solution with the editor today.
NFS service
NFS:network file system network file system, a protocol for sharing files between unix systems.
The client of NFS is mainly linux, which supports simultaneous mounting of multiple nodes and concurrent writes.
Prepare 3 servers:
Web1:192.168.2.1
Web2:192.168.2.2
Nas:192.168.2.3
Close selinux:sed-I'/ ^ SELINUX=/cSELINUX=disable' / etc/selinux/config
-I: directly modify the contents of the read file instead of outputting it to the terminal.
Turn off the firewall: systemctl stop firewalld.service; systemctl disable firewalld
1.nas (storage side)
1) installation service: yum-y install nfs-utils.x86_64
2) create a directory: [root@nas ~] # mkdir / webdata
3) write to the webpage file: [root@nas ~] # echo "nfs test." > / webdata/index.html
4) write configuration file: [root@nas ~] # vim / etc/exports
/ webdata 192.168.2.0 Universe 24 (rw,sync,no_root_squash)
Rw: read and write
Sync: write data to memory and hard disk at the same time to ensure no data loss
No_root_squash does not suppress root, and when a NFS client is accessed as a root administrator, it is mapped to the root administrator of the NFS server.
Configuration of 2.WEB1/WEB2:
1) View: [root@web1 ~] # showmount-e 192.168.2.3
Export list for 192.168.2.101:
/ webdata 192.168.2.0/24
2) installation service: yum-y install nfs-utils; yum-y install httpd
3) Mount: vim / etc/fstab
192.168.2.3:webdata / var/www/html nfs defaults 0 0
Mount-a
4) View df: 192.168.2.3:/webdata 18G 3.1G 15G 18% / var/www/html
3. Verification: no matter which WEB server you visit, the content of the web page you see is the same, achieving data synchronization.
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