Minimal rsync process for multinode web cluster

install rsync pkg if not installed on every node

yum install rsync

choose a “master node” to take code from, in our example we name it node1 and the others node2,3,4 etc

NODE 1
useradd rsyncuser
cat /home/ec2-user/.ssh/authorized_keys

copy the auth key inside

su rsyncuser
cd /home/rsyncuser
mkdir .ssh
chmod 700 .ssh
vi .ssh/authorized_keys

paste the key in your clipboard

chmod 600 .ssh/authorized_keys
exit

NODE 2,3,4
mkdir /root/keys
vi /root/keys/node1rsync.key

and copy inside your node1 ec2 private key

chmod 600 /root/keys/node1rsync.key

now you can launch an rsync command from node2,3,4 to node1 every X minutes

crontab -e

and add

*/X * * * * /usr/bin/rsync -avzhe "ssh -i /root/keys/nide1rsync.key" rsyncuser@NODE1_IP_OR_FQDN:/var/www/vhosts/www.yourwebsite.it /var/www/vhosts/

enjoy

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