lsyncd - synchronize daemon

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What’s lsyncd

My understanding is, it’s kind of rsync daemon.

Install

On Ubuntu

Install on source servers (no need to install on destination servers).

apt update 
apt install lsyncd

Set kernel parameter fs.inotify.max_user_watches.

/etc/sysctl.conf

# for lsyncd
fs.inotify.max_user_watches = 8192000

Before running

We should configure firewall so that the source server can SSH to destination servers.

Here is my ssh snippets.

Use (sync)

Configuration

Here is the configuration example.

mkdir /etc/lsyncd
vim /etc/lsyncd/lsyncd.conf.lua

settings{
        logfile = "/var/log/lsyncd.log",
        statusFile = "/tmp/lsyncd.stat",
        statusInterval = 1,
        delay=0,
}

fundation = {
        default.rsync,
        source="/path/to/source/sync/dir",
        target="user@dest.com:/path/to/dest/dir",
        delay=0,
        rsync = {
                owner = true,
                group = true,
                archive = true,
                links   = true,
                update  = true,
                verbose = false,
                bwlimit = 30000,
                rsh     = "/usr/bin/ssh -i /home/atlex00/.ssh/id_rsa -l atlex00 -o StrictHostKeyChecking=no" 
        }
}
sync{ fundation, target="user@dest.com:/path/to/dest/dir" }

Start sync

systemctl restart lsyncd