User data to perform the initial set up of an AWS EC2 machine after running the AMI script

aws-ec2-rails-user-data.sh

#!/bin/bash

# This scripts performs the initial setup for an EC2 AMI that has
# been previously prepared to accept Rails apps.


# --- USER DATA SCRIPT STARTS ---

# Configure SSH key for the rails user (same as ubuntu, AWS configured key)
sudo mkdir /home/rails/.ssh
sudo cp /home/ubuntu/.ssh/authorized_keys /home/rails/.ssh
sudo chown -R rails:rails /home/rails/.ssh
sudo chmod 700 /home/rails/.ssh
sudo chmod 600 /home/rails/.ssh/authorized_keys

# Copy Github SSH credentials so Capistrano is able to pull code from private Github repos
cat << EOF > /home/rails/.ssh/id_rsa
-----BEGIN OPENSSH PRIVATE KEY-----
<REDACTED>
-----END OPENSSH PRIVATE KEY-----
EOF

cat << EOF > /home/rails/.ssh/id_rsa.pub
ssh-rsa <REDACTED>
<REDACTED> <redacted-email>@users.noreply.github.com
EOF

# Set up the right permissions to the ssh folder
sudo chown -R rails:rails /home/rails/.ssh
sudo chmod 700 /home/rails/.ssh
sudo chmod 600 /home/rails/.ssh/authorized_keys
sudo chmod 600 /home/rails/.ssh/id_rsa
sudo chmod 600 /home/rails/.ssh/id_rsa.pub