Capistrano recipe to create a user on EC2

bootstrap_user.rb

set :aws_private_key_path, "~/.ec2/mrkey.pem"

namespace :setup_server do
  desc "adds a user and uploads his id_rsa.pub to the EC2 instance's deploy users authorized_keys2 file"
  task :create_deploy_user do

    # \\n becomes \n
    commands = <<-SH.split("\n").map(&:strip).join(";")
      sudo echo hi
      sudo groupadd admin
      sudo useradd -d /home/#{user} -s /bin/bash -m #{user}
      echo #{user}:#{password} | sudo chpasswd
      sudo usermod -a -G admin deploy
      echo '%admin ALL=(ALL) ALL' | sudo tee -a /etc/sudoers
      sudo mkdir /home/#{user}/.ssh
      sudo chmod   700   /home/#{user}.ssh
      sudo chown #{user} /home/#{user}/.ssh
      sudo chgrp #{user} /home/#{user}/.ssh
    SH

    setup_user = <<-SH
      ssh -i #{aws_private_key_path} ec2-user@#{domain} "script -c \\"#{commands}\\" /dev/null"
    SH


    puts setup_user
    system setup_user

    add_my_ssh_key
  end

  task :add_my_ssh_key do
    ssh_options[:keys].each do |key|
      authorized_keys2 = "/home/#{user}/.ssh/authorized_keys2"

      commands = <<-SH.split("\n").map(&:strip).join(";")
        sudo touch #{authorized_keys2}
        sudo cat /tmp/my_key.pub | sudo tee -a #{authorized_keys2}
        sudo rm /tmp/my_key.pub
        sudo chmod   600   #{authorized_keys2}
        sudo chown #{user} #{authorized_keys2}
        sudo chgrp #{user} #{authorized_keys2}
      SH

      setup_keys = <<-SH.strip
        scp -i #{aws_private_key_path} #{key} ec2-user@#{domain}:/tmp/my_key.pub
        ssh -i #{aws_private_key_path} ec2-user@#{domain} "script -c \\"#{commands}\\" /dev/null"
      SH

      puts setup_keys
      system setup_keys
    end
  end

end