lsyncd-between-servers.md

To set up file synchronization between two Ubuntu servers using lsyncd, you can follow these steps:

Server Details:

1. SFTPAPP01 (10.16.6.1)
2. SFTPAPP02 (10.16.6.2)

1. Install lsyncd:

First, you need to install lsyncd on both servers.

sudo apt update
sudo apt install lsyncd

2. Create SSH Keys (if not already created):

If you haven't already set up SSH keys between the two servers, you need to generate them and exchange them between the servers.

On SFTPAPP01:

ssh-keygen -t rsa

Then copy the public key to SFTPAPP02:

ssh-copy-id [email protected]

Repeat this step vice-versa (from SFTPAPP02 to SFTPAPP01) if needed.

3. Configure lsyncd:

Create a configuration file for lsyncd on each server. Let's assume you create a file named lsyncd.conf in /etc/lsyncd/.

On SFTPAPP01:

sudo vi /etc/lsyncd/lsyncd.conf

Add the following content:

settings {
    statusFile = "/var/log/lsyncd/lsyncd.status",
    statusInterval = 10
}

sync {
    default.rsyncssh,
    source = "/sftpusers/files/",
    host = "10.16.6.2",
    targetdir = "/data/syncfiles/",
    delay = 5,
    excludeFrom = "/etc/lsyncd/lsyncd-excludes.txt",
}

On SFTPAPP02:

sudo vi /etc/lsyncd/lsyncd.conf

Add the following content:

settings {
    statusFile = "/var/log/lsyncd/lsyncd.status",
    statusInterval = 10
}

sync {
    default.rsyncssh,
    source = "/data/syncfiles/",
    host = "10.16.6.1",
    targetdir = "/sftpusers/files/",
    delay = 5,
    excludeFrom = "/etc/lsyncd/lsyncd-excludes.txt",
}

4. Start lsyncd:

After configuring lsyncd, start the lsyncd service on both servers.

sudo systemctl start lsyncd

You can also enable lsyncd to start automatically on system boot:

sudo systemctl enable lsyncd

5. Monitor lsyncd:

You can monitor the synchronization process and check for any errors in the log files specified in the configuration (/var/log/lsyncd/lsyncd.status).

tail -f /var/log/lsyncd/lsyncd.status

With these steps, you should have lsyncd set up to synchronize files between the specified directories on both servers. Make sure to test the synchronization and monitor it regularly to ensure it's working as expected.