Aws autoscaling code deployer

###Automatically deploy code changes from github repository across all EC2 instances behind AWS autoscaling group in a single region.

How it works

• You push to github repository (public/private)
• Github webhook URL will be invoked
• Aws autoscaling code deployer will instantly deploy those changes
• That's it. :P

For now I'm assuming the following parameters, please change those depending upon your requirements

• Web server: Apache2
• Document root: /var/www
• Apache username: www-data
• General username: ubuntu

Important

1. It'll work irrespective of the repository type, and I guess in most cases your github repository will be private although it's entirely upto you.

2. Github webhook URL: Use either one of Public DNS/Elastic IP of anyone of the EC2 instance behind autoscaling group or ELB A record or your domain name. Keep in mind that all of those must point to the location aws_autoscaling_code_deployer/index.php

Public DNS: http://ec2-xxx-xxx-xxx-xxx.region-name.compute.amazonaws.com/path/to/aws_autoscaling_code_deployer/index.php

Elastic IP: http://xxx-xxx-xxx-xxx/path/to/aws_autoscaling_code_deployer/index.php

ELB A record: http://elb_name-xxxxxxxxx.region-name.elb.amazonaws.com/path/to/aws_autoscaling_code_deployer/index.php

Domain name: http://www.example.com/path/to/aws_autoscaling_code_deployer/index.php

Setting up your repository

Make sure that your repository contains index.php and config.php of this repository inside aws_autoscaling_code_deployer directory

1. Specify your AWS credentials and configs in config.php

• Access key ID

  Example: AKIAIOSFODNN7EXAMPLE

• Secret access key:

  Example: wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY

• Region: AWS region where you've setup your autoscaling group

  Must be set to one of the following values:

  us-east-1, ap-northeast-1, sa-east-1, ap-southeast-1, ap-southeast-2, us-west-2, us-gov-west-1, us-west-1, cn-north-1, eu-west-1

• Autoscaling group: Name of your autoscaling group

• Document root: Your webserver document root

  Example: /var/www

2. Setup a service hook such that it points to index.php of this repository by navigating to your github repository -> settings -> hooks -> WebHook URLs

Setting up the AMI

Minimum requirements

• Web server
• PHP 5.3.3+ compiled with the cURL extension
• cURL 7.16.2+ compiled with OpenSSL and zlib
• git

Steps to configure AMI

2. Change document root ownership to web-server user

sudo chown -R www-data:www-data /var/www

3. Login as web-server user

sudo su www-data

4. Change directory to web-server home directory

cd ~

5. Generate SSH keys
6. Create empty repository

git init

7. Add a remote origin

git remote add origin git@github.com:username/repository.git

8. Download the latest from remote repository without trying to merge or rebase anything

git fetch --all

9. Pull

git pull origin master

10. Logout of www-data user
11. Configure to run a startup script

sudo nano /etc/rc.local

Add

su - www-data -c /etc/init.d/pull > /home/ubuntu/pull.log

before

exit 0

12. Create the startup script

sudo nano /etc/init.d/pull

Add the following lines

#!/bin/sh
php /var/www/aws_autoscaling_code_deployer/index.php update
sudo chmod +x /etc/init.d/pull

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -m 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request

Get in touch

Joy Prakash Sharma

droidlabour@gmail.com