Deploying Rails App On Ec2

Slide 1: Deploying Rails app on Amazon EC2 By: Manik Juneja Akhil Bansal

Slide 2: Introduction Manik Juneja  manik@vinsol.com  http://fromdelhi.com  Akhil Bansal  akhil@vinsol.com  http://webonrails.com 

Slide 3: 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

Slide 4: 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 

Slide 5: 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) 

Slide 6: But No Backup and Restore Services

Slide 7: Deploying Rails app on EC2

Slide 8: 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 

Slide 9: OR

Slide 10: Use a rubyforge project “ec2onrails”

Slide 11: 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 

Slide 12: 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 

Slide 13: 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 

Slide 14: 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 

Slide 15: 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

Slide 16: 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

Slide 17: 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

Slide 18: Cont... Authorizing Network Access to Your Instances  ec2-authorize default -p 22 ec2-authorize default -p 80

Slide 19: Cont... Connecting to your Instance  ssh -i id_rsa-gsg-keypair root@ec2-67-202-1-178.z-2.compute-1.amazonaws.com passwd admin  passwd app 

Slide 20: Cont... Modify s3.yml  Modify deploy.rb  cap ec2onrails:setup  cap deploy:migrations 

Slide 21: 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.

Slide 22: Public IP Your Instances wget http://169.254.169.254/latest/meta-data/public-ipv4 from your  Instance

Slide 23: 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

Slide 24: 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

Slide 25: Run and Manage Instances online We know this one service which let us mange instances online:  RightScale.com

Slide 26: 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.

Slide 27: 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”.

Slide 28: Thanks