rsync + cron file synchronization service

Server installation package:

rsync（centos7 ）
rsync，rsync-daemon（centos8）

Client:
simply install rsync can (in terms of centos8)

Server-side configuration

1. Profiles
vim /etc/rsyncd.conf

    uid = root
    gid = root
    use chroot = no
    #最大的链接数，0表示不去控制他
    max connections = 0
    ignore errors
    #备份时排除哪个文件夹
    exclude = lost+found/
    #日志
    log file = /var/log/rsyncd.log
    pid file = /var/run/rsyncd.pid
    lock file = /var/run/rsyncd.lock
    #是否做反向dns解析
    reverse lookup = no
    #允许哪个ip访问
    hosts allow = 192.168.8.0/24


    #可以多账号添加不同的文件夹[文件夹名]
    [backup] 
    #存放路径
    path = /backup/ 
    comment = backup
    read only = no
    #同步时用的虚拟账户
    auth users = rsyncuser
    #密码存放位置
    secrets file = /etc/rsync.p

2. The server side is ready directory
mkdir / backup

3. Verify that the file generating
echo "rsyncuser: 123"> /etc/rsync.pass
the chmod 600 /etc/rsync.pass

4.systemctl enable --now rsyncd

Client Configuration

1. Create verification file
echo "123"> /etc/rsync.pass
chmod 600 /etc/rsync.pass

2. Client Test
rsync -avz --delete --password-file = / etc / rsync.pass / data rsyncuser @ ip :: backup

Above to achieve a full backup, in order to achieve automatic backup, will write a regular job or write a script with inotify.

Timing task:
the crontab -e
# 30 a synchronization minutes
* / 30 * * * * / usr / bin / rsync -avz --delete --password-file = / etc / rsync.pass / data rsyncuser @ ip :: backup server