Unison setup guide

Install Unison

yum install unison

apt-get install unison

Configuration of unison

Before configuring unison itself, you need to ensure that the hosts have shared keys (since this connection is made via SSH).

ssh-keygen -t rsa

ssh-copy-id root@otherserver

Once that's sorted, the unison service itself can be configured.

default unison config file:

/root/.unison/default.prf

root = /
root = ssh://b4sed-01//

path = var/spool/cron/
path = etc/passwd
path = etc/shadow
path = etc/group
path = etc/motd
path = etc/drbd.conf
path = etc/cluster/cluster.conf
path = etc/php.ini
path = etc/nginx/

ignore = Name access.log*

To have unison run automatically, you'll need to configure a cron:

this is my script for this:

vi /usr/local/bin/sync.sh

#!/bin/bash
[ -z $(ps -axo comm | grep unison) ] && /usr/bin/unison -batch

Once added, then the cron needs setting up

crontab -e

* * * * * /usr/local/bin/sync.sh > /root/.unison/unison.log