rsync + lsyncd 的高效文件实时同步系统

[源服务器] --(inotify监听)--> [lsyncd] --(触发rsync)--> [目标服务器]

# 源服务器 & 目标服务器都需要 rsync
sudo apt install rsync -y
​
# 源服务器安装 lsyncd
sudo apt install lsyncd -y

ssh-keygen -t rsa
ssh-copy-id user@target_host

settings {
    logfile    = "/var/log/lsyncd/lsyncd.log",
    statusFile = "/var/log/lsyncd/lsyncd.status",
    statusInterval = 20
}
​
sync {
    default.rsync,
    source = "/data/www",   -- 需要同步的目录
    target = "user@target_host:/data/www",
    rsync = {
        archive  = true,    -- 保留权限、时间戳等
        compress = true,    -- 压缩传输
        verbose  = true,
        _extra   = {"--bwlimit=5000"} -- 限速，单位KB/s，可选
    },
    delay = 5  -- 延迟合并事件，减少频繁调用
}

sudo systemctl enable lsyncd
sudo systemctl start lsyncd