Deploying Rails app on Amazon EC2 By: Manik Juneja Akhil Bansal

Introduction Manik Juneja [email_address] http://fromdelhi.com Akhil Bansal [email_address] http://webonrails.com

Manik Juneja

[email_address]

http://fromdelhi.com

Akhil Bansal

[email_address]

http://webonrails.com

Intended audience We assume that you are aware of: Amazon Simple Storage System(S3) Basic Ruby and Rails Deployment tool “Capistrano” Rails deployment with Apache and Mongrel Clusters

We assume that you are aware of:

Amazon Simple Storage System(S3)

Basic Ruby and Rails

Deployment tool “Capistrano”

Rails deployment with Apache and Mongrel Clusters

What is Amazon EC2? EC2 stands for Elastic Compute Cloud A Beta web service from Amazon Provides resizable compute capacity in the cloud Makes on-demand web computing easier

EC2 stands for Elastic Compute Cloud

A Beta web service from Amazon

Provides resizable compute capacity in the cloud

Makes on-demand web computing easier

What Amazon Gives? Hardware CPU capacity of 1.0-1.2 GHz 2007 Opteron Instances with 1.7, 7.5 and 15 GB memory. Internet & Intranet Power Public Amazon Machine Images(AMIs)

Hardware

CPU capacity of 1.0-1.2 GHz 2007 Opteron

Instances with 1.7, 7.5 and 15 GB memory.

Internet & Intranet

Power

Public Amazon Machine Images(AMIs)

No Backup and Restore Services But

Deploying Rails app on EC2

Deploying Rails app on EC2

Deploying Rails app on EC2 Run your instance and: Install Ruby and Rubygems Install Rails and other required gems Install Webserver Install DBMS and create DB Write Capistrano Script

Run your instance and:

Install Ruby and Rubygems

Install Rails and other required gems

Install Webserver

Install DBMS and create DB

Write Capistrano Script

OR

Use a rubyforge project “ec2onrails”

Deploying Rails app on EC2 We'll use ruby gem “EC2 on Rails” Developed by a Canadian developer Paul Dowman http://pauldowman.com/ EC2 on Rails's AMI

We'll use ruby gem “EC2 on Rails”

Developed by a Canadian developer Paul Dowman

http://pauldowman.com/

EC2 on Rails's AMI

Features of the EC2onrails AMI: Ubuntu 7.10 “Gutsy” MySQL 5 Ruby 1.8.6 Ruby on Rails 1.2.5 Automatic backup of MySQL database to S3. Amazon AMI tools installed 32-bit and 64-bit images available

Ubuntu 7.10 “Gutsy”

MySQL 5

Ruby 1.8.6

Ruby on Rails 1.2.5

Automatic backup of MySQL database to S3.

Amazon AMI tools installed

32-bit and 64-bit images available

Lets Deploy gem install ec2onrails Put Capfile in the RAILS_ROOT Put deploy.rb and s3.yml in the config export JAVA_HOME= <PATH> Signup for S3 and Amazon EC2 mkdir /home/akhil/.ec2 Put X.509 certificate and private key in .ec2

gem install ec2onrails

Put Capfile in the RAILS_ROOT

Put deploy.rb and s3.yml in the config

export JAVA_HOME= <PATH>

Signup for S3 and Amazon EC2

mkdir /home/akhil/.ec2

Put X.509 certificate and private key in .ec2

Cont... Download the Amazon EC2 Command-Line Tools export EC2_HOME= <path-to-tools> export PATH=$PATH:$EC2_HOME/bin export EC2_PRIVATE_KEY=~/.ec2/ private_key export EC2_CERT=~/.ec2/ certificate

Download the Amazon EC2 Command-Line Tools

export EC2_HOME= <path-to-tools>

export PATH=$PATH:$EC2_HOME/bin

export EC2_PRIVATE_KEY=~/.ec2/ private_key

export EC2_CERT=~/.ec2/ certificate

Cont... Generate a Keypair: ec2-add-keypair gsg-keypair The private key returned needs to be saved in a local file so that you can use it later

Generate a Keypair:

ec2-add-keypair gsg-keypair

The private key returned needs to be saved in a local file so that you can use it later

Cont... Running an Instance: ec2-run-instances ami-86c025ef -k gsg-keypair RESERVATION r-64f61f0d 110620076136 default INSTANCE i-b1b740d8 ami-86c025ef pending gsg-keypair 0 m1.small 2007-12-05T06:15:38+0000

Running an Instance:

ec2-run-instances ami-86c025ef -k gsg-keypair

RESERVATION r-64f61f0d 110620076136 default

INSTANCE i-b1b740d8 ami-86c025ef pending gsg-keypair 0 m1.small 2007-12-05T06:15:38+0000

Cont... ec2-describe-instances i-b1b740d8 RESERVATION r-64f61f0d 110620076136 default INSTANCE i-b1b740d8 ami-86c025ef ec2-67-202-1-178.z-2.compute-1.amazonaws.com domU-12-31-35-00-49-A2.z-2.compute-1.internal running gsg-keypair 0 m1.small 2007-12-05T06:15:38+0000

ec2-describe-instances i-b1b740d8

RESERVATION r-64f61f0d 110620076136 default

INSTANCE i-b1b740d8 ami-86c025ef

ec2-67-202-1-178.z-2.compute-1.amazonaws.com

domU-12-31-35-00-49-A2.z-2.compute-1.internal

running gsg-keypair 0 m1.small

2007-12-05T06:15:38+0000

Cont... Authorizing Network Access to Your Instances ec2-authorize default -p 22 ec2-authorize default -p 80

Authorizing Network Access to Your Instances

ec2-authorize default -p 22

ec2-authorize default -p 80

Cont... Connecting to your Instance ssh -i id_rsa-gsg-keypair [email_address] passwd admin passwd app

Connecting to your Instance

ssh -i id_rsa-gsg-keypair [email_address]

passwd admin

passwd app

Cont... Modify s3.yml Modify deploy.rb cap ec2onrails:setup cap deploy:migration s

Modify s3.yml

Modify deploy.rb

cap ec2onrails:setup

cap deploy:migration s

Cont... Other capistrano tasks ec2onrails:db:archive ec2onrails:db:restore ec2onrails:db:create ec2onrails:db:drop ec2onrails:db:recreate ec2onrails:db:set_root_password ec2onrails:ami_ids - Shows the AMI id’s of the images that match the current version of the gem. ec2onrails:setup - This is a convenience task to get a new instance completely set up in one step, everything except deploying the app. ec2onrails:restore_db_and_deploy - Another convenience task to recreate the db, restore data to it from an s3 bucket and deploy the app, useful to set up a staging server.

Other capistrano tasks

ec2onrails:db:archive

ec2onrails:db:restore

ec2onrails:db:create

ec2onrails:db:drop

ec2onrails:db:recreate

ec2onrails:db:set_root_password

ec2onrails:ami_ids - Shows the AMI id’s of the images that match the current version of the gem.

ec2onrails:setup - This is a convenience task to get a new instance completely set up in one step, everything except deploying the app.

ec2onrails:restore_db_and_deploy - Another convenience task to recreate the db, restore data to it from an s3 bucket and deploy the app, useful to set up a staging server.

Public IP Your Instances wget http://169.254.169.254/latest/meta-data/public-ipv4 from your Instance

wget http://169.254.169.254/latest/meta-data/public-ipv4 from your Instance

Terminating Your Instances ec2-terminate-instances i-b1b740d8 RESERVATION r-64f61f0d 110620076136 default INSTANCE i-b1b740d8 ami-86c025ef ec2-67-202-1-178.z-2.compute-1.amazonaws.com domU-12-31-35-00-49-A2.z-2.compute-1.internal shutting-down gsg-keypair 0 m1.small 2007-12-05T06:15:38+0000

ec2-terminate-instances i-b1b740d8

RESERVATION r-64f61f0d 110620076136 default

INSTANCE i-b1b740d8 ami-86c025ef

ec2-67-202-1-178.z-2.compute-1.amazonaws.com

domU-12-31-35-00-49-A2.z-2.compute-1.internal

shutting-down gsg-keypair 0 m1.small

2007-12-05T06:15:38+0000

Check status of instances ec2-describe-instances RESERVATION r-64f61f0d 110620076136 default INSTANCE i-b1b740d8 ami-86c025ef terminated gsg-keypair 0 m1.small 2007-12-05T06:15:38+0000

ec2-describe-instances

RESERVATION r-64f61f0d 110620076136 default

INSTANCE i-b1b740d8 ami-86c025ef terminated

gsg-keypair 0 m1.small 2007-12-05T06:15:38+0000

Run and Manage Instances online We know this one service which let us mange instances online: RightScale.com

We know this one service which let us mange instances online:

Benefits Ability to Start, terminate, and monitor instances, using the web service APIs. Free Data transferred within the Amazon EC2 environment, or between Amazon EC2 and Amazon S3 Pay for the instance-hours and bandwidth that you actually consume.

Ability to Start, terminate, and monitor instances, using the web service APIs.

Free Data transferred within the Amazon EC2 environment, or between Amazon EC2 and Amazon S3

Pay for the instance-hours and bandwidth that you actually consume.

Points to consider: Data loss when instance is terminated Instance gets a new public IP when started again Need to use third party Dynamic DNS service, like “easydns.com”.

Data loss when instance is terminated

Instance gets a new public IP when started again

Need to use third party Dynamic DNS service, like “easydns.com”.

Thanks