Launch EC2 instance using boto3 with sample application

• Introduction
• Pre-requisites
• Steps to run script
• Result

Introduction

In this repo, we are lanuch ec2 instance using native boto3.

Pre-requisites

• Ensure you install the latest version of python and requests package.

pip install paramiko

• We need IAM user access key and secert key to run this script. Please refer AWS documents to create the same.

Steps to run script

• Clone the repo, it has prepackaged boto3,botocore,jmespath and dateutil.

• Execute the below command which will create the ec2 instance at the particular aws region and install the ruby application.

./aws_boto3_create_instance.py -k <AWS_ACCESS_KEY> -s <AWS_SECRET_KEY> --aws_region <AWS_REGION> -t <AWS_INSTANCE_TYPE> -i <AWS_AMI_ID> -n <AWS_TAG_NAME>

Example:

./aws_boto3_create_instance.py -k XXXXXXXX -s XXXXX --aws_region ap-south-1 -t t2.micro -i ami-0d773a3b7bb2bb1c1 -n SampleApplication

Notes:

• The script contains two classes

aws_ec2 -> Which will create the key pair, security group which opens 22 and 80 port, and launch the instance in the respective region. install_application -> Which will connect to respective instance and execute the commands sudo apt update sudo apt -y install ruby-bundler git clone https://github.com/iproperty/simple-sinatra-app.gitt cd simple-sinatra-app/ ; bundle install" cd simple-sinatra-app/ ; sudo bundle exec rackup --host 0.0.0.0 -p80 > application.log 2>&1 &

Why Python?

• Ease of changing the application incase if we want to run different.
• Using boto3 its ease to connect to aws instance.

Security:

• The security group has only 80 and 22 port.
• AWS key and secert key are not stored anywhere in the script,it taken from the command line.

Tested Environment.

• AWS t2.micro instances
• Ubuntu 18.04 -> ami-0d773a3b7bb2bb1c1
• Simple ruby application.