Example: Enabling passwordless SSH

You can build on the shared home directory example to implement SSH connections between cluster instances using SSH keys. For each user using the shared home file system, run a script that resembles the following:

#!/bin/bash

mkdir -p $HOME/.ssh && chmod 700 $HOME/.ssh
touch $HOME/.ssh/authorized_keys
chmod 600 $HOME/.ssh/authorized_keys

if [ ! -f "$HOME/.ssh/id_rsa" ]; then
    ssh-keygen -t rsa -b 4096 -f $HOME/.ssh/id_rsa -N ""
    cat ~/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys
fi