rsync+lsync

## 目的机器
目的机器 192.168.0.2

安装
yum -y install rsync

配置
```
[root@localhost ~]# cat /etc/rsyncd.conf
motd file = /etc/rsyncd.motd
transfer logging = yes
log file =/var/log/rsyncd.log
pid file =/var/run/rsyncd.pid
lock file =/var/run/rsync.lock
port = 873
address = 192.168.0.2
uid = root
gid = root
use chroot = no
read only = no
write only = yes
max connections = 10
[ops]
comment = test content
path = /data123/
ignore errors
auth users = localnetwork
secrets file = /etc/rsyncd.secrets
hosts allow=192.168.0.0/255.255.255.0
hosts deny=*
list= false
[root@localhost ~]#
```

配置服务器账号密码，格式为 用户名:密码，可以设置多个，每行一个用户名:密码
```
echo localnetwork:Local_12 > /etc/rsyncd.secrets
chmod 600 /etc/rsyncd.secrets

[root@localhost ~]# cat  /etc/rsyncd.secrets
localnetwork:Local_12
```

启动命令
```
systemctl restart rsyncd.service
```
防火墙放通端口
```
firewall-cmd --zone=public --add-port=873/tcp --permanent
firewall-cmd --reload
```

注：
如果rsync报错如下则需关闭selinux：
rsync: failed to set times on "." (in backup): Permission denied (13)
翻译可知：更新.文件的时间失败：原因是权限不够。关闭selinux即可。

获取当前selinux状态
getenforce

关闭selinux
sudo setenforce 0

永久关闭
sudo vim /etc/sysconfig/selinux或vi /etc/selinux/config
将SELINUX=enforcing改为SELINUX=disabled

## 源机器
源机器 192.168.0.1

安装
yum install -y lsyncd

配置
```
[root@h0_1 ~]# cat /etc/lsyncd.conf

settings{
    logfile      ="/var/log/lsyncd.log",
    statusFile = "/var/run/lsyncd.stat",
    inotifyMode  = "CloseWrite",
    maxProcesses = 7,
    statusInterval = 1,
    nodaemon =true,
    insist = true
}
sync{
    default.rsync,
    -- 本地同步目录 即将该目录下的内容同步到远端rsync服务器
    source="/data123/",
    -- 支持同步删除
    delete = true,
    -- 远端rsync服务信息
    target="localnetwork@192.168.0.2::ops/",
    rsync     = {
        binary    = "/usr/bin/rsync",
        archive   = true,
        compress  = true,
        verbose   = true,
        -- 使用的rsync密码文件
        password_file = "/etc/rsync.password"
        }
}

```
配置密码
```
echo "Local_12" >/etc/clint.password
chmod 600 /etc/clint.password

[root@h0_1 ~]# cat /etc/rsync.password
Local_12
```

执行修改
```
sysctl -w fs.inotify.max_user_watches=99999
```

Linux系统重启inotify配置max_user_watches无效被恢复默认值8192的正确修改方法为：

vim /etc/sysctl.conf
注意添加的内容：
fs.inotify.max_user_watches=99999（你想设置的值）

注释：/proc/sys/fs/inotify/max_user_watches
默认值: 8192
指定了每个inotify instance相关联的watches的上限，也就是每一个inotify实例可监控的最大目录数。如果监控的文件数目巨大，需要根据实际情况适当增加此值得大小。      参考：https://blog.mydns.vip/4369.html
[root@h0_1 ~]# systemctl start lsyncd

参考：lsync实时同步搭建步骤  https://blog.csdn.net/m0_49562857/article/details/128890901