Requirements
- At least 2 servers
- lsyncd installed on both servers
- ssh access between both servers
Assumptions
- username for both servers is: forge
- IP for server #1: 111.111.111
- IP for server #2: 222.222.222
- Folder to sync between the 2 servers (can be different, this example both same path and directory): syncro
- SSH key (can be different, this example same key name): syncro_key
Setup
This setup is for server #1, to setup server #2 it's the same. Just see the comments in the code in step #4
- Install lsyncd
sudo apt install lsyncd
- Create lsyncd log folder
sudo mkdir /var/log/lsyncd
- Create log and status files
sudo touch /var/log/lsyncd/lsyncd.{log,status}
-
Create config file
sudo nano /etc/lsyncd.conf.lua
-
Note: Anything after
--
are comments in the code
-- server #1 setup settings { logfile = "/var/log/lsyncd/lsyncd.log", -- location of log file created in step 3 statusFile = "/var/log/lsyncd/lsyncd.status", -- location of status file created in step 3 } targetlist = { "forge@222.222.222:/home/forge/syncro", -- server #2 will have target forge@111.111.111 } for _, server in ipairs( targetlist ) do sync { default.rsync, source = "/home/forge/syncro", -- folder which to sync from target = server, delete = 'running', rsync = { rsh = "ssh -i /home/forge/.ssh/syncro_key", -- ssh key update = true, archive = true, compress = true, } } end
-
Start the lsyncd service
sudo service lsyncd start
-
Set the config lsyncd service will use
sudo lsyncd /etc/lsyncd.conf.lua
- IMPORTANT When the server restarts run this again
Notes
There is a limit to how many files/folders that can be watched
- To check the current limit:
cat /proc/sys/fs/inotify/max_user_watches
- To permanently alter the limit : (500000 is an example number)
sudo sysctl fs.inotify.max_user_watches=500000
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