User_data for custom account and ssh key

user_data.sh

#Replace {{myaccount}} with e.g. your id
#TODO: Replace {{myaccount}} with appropriate shell variable and references
#This has been tested in RHEL7, AWS-Linux, Ubuntu 14.04

#!/bin/bash -xe
cat << EOF > /etc/sudoers.d/{{myaccount}}
# User rules for {{myaccount}}
{{myaccount}} ALL=(ALL) NOPASSWD:ALL
EOF

# create user
useradd -m -s /bin/bash {{myaccount}}

# drop in SSH public authorized key
mkdir -p /home/{{myaccount}}/.ssh
# sample key - this is the insecure Vagrant key pair from https://github.com/mitchellh/vagrant/tree/master/keys
# (save the vagrant private key locally as .pem file to access this instance)
echo "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA6NF8iallvQVp22WDkTkyrtvp9eWW6A8YVr+kz4TjGYe7gHzIw+niNltGEFHzD8+v1I2YJ6oXevct1YeS0o9HZyN1Q9qgCgzUFtdOKLv6IedplqoPkcmF0aYet2PkEDo3MlTBckFXPITAMzF8dJSIFo9D8HfdOV0IAdx4O7PtixWKn5y2hMNG0zQPyUecp4pzC6kivAIhyfHilFR61RGL+GPXQ2MWZWFYbAGjyiYJnAmCP3NOTd0jMZEnDkbUvxhMmBYSdETk1rRgm+R4LOzFUGaHqHDLKLX+FIPKcF96hrucXzcWyLbIbEgE98OHlnVYCzRdK8jlqm8tehUc9c9WhQ== vagrant insecure public key" > /home/{{myaccount}}/.ssh/authorized_keys
chown -R {{myaccount}}:{{myaccount}} /home/{{myaccount}}/.ssh
chmod 700 /home/{{myaccount}}/.ssh
chmod 600 /home/{{myaccount}}/.ssh/authorized_keys