#! /bin/bash

##### $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
## Run this script in a current node by defining the user and the IP of the remote server
## This will generate a passwordless ssh for $user to-and-fro the current node and the frontend
## Need to supply password to and fro both nodes when prompted 
##### $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

user=root
frontend=192.168.1.10


######### do not need to modify  #######

### generates a rsa key in the current compute node for $user
ssh-keygen -t rsa

### copy the rsa key of the $user in the current compute node to the frontend
ssh-copy-id -i $user/.ssh/id_rsa.pub $frontend

### remotely generates the rsa key for the $user in the frontend by ssh-ing from the current compute node.
ssh $user@$frontend "ssh-keygen -t rsa"

### remotely asks the rsa key for the $user in the frontend to be copied via ssh to the current compute node. 
HOSTNAME=$(cat /etc/hostname)
ssh $user@$frontend "ssh-copy-id -i $user/.ssh/id_rsa.pub $HOSTNAME"