InstallDocker.sh

#!/bin/bash

# Add user ansible admin
useradd ansibleadmin 

# Set password: the below command will avoid re-entering the password
echo "ansibleadmin" | passwd --stdin ansibleadmin

# Modify the sudoers file at /etc/sudoers and add entry
echo 'ansibleadmin  ALL=(ALL)   NOPASSWD: ALL' | tee -a /etc/sudoers
echo 'ec2-user ALL=(ALL) NOPASSWD: ALL' | tee -a /etc/sudoers

# Enable Password Authentication
sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/g' /etc/ssh/sshd_config
systemctl restart sshd

# Update the installed packages and package cache
yum update -y

# Install the most recent Docker Engine package
amazon-linux-extras install docker -y

# Start the Docker service
systemctl start docker

# Auto start Docker service after booting
systemctl enable docker

# Install docker module for Python2 (require for ansible)
yum install python-pip -y
pip install docker-py

# Add user ansible admin to docker group (execute without using sudo)
usermod -a -G docker ansibleadmin