Module: Capistrano::EC2AMI

Defined in:
lib/capistrano-ec2ami.rb

Class Method Summary collapse

Class Method Details

.extend(configuration) ⇒ Object

def extend

Purpose: Extends the module methods to the Capistrano class

Returns: nothing



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
 
# File 'lib/capistrano-ec2ami.rb', line 14

def self.extend(configuration)

  configuration.load do
    Capistrano::Configuration.instance.load do

      _cset(:aws_secret_access_key, ENV['AWS_SECRET_ACCESS_KEY'])
      _cset(:aws_access_key_id, ENV['AWS_ACCESS_KEY_ID'])
      _cset(:ec2ami_role, :web)
      _cset(:ec2ami_name, "capistrano-ec2ami-#{Time.now.to_i}")
      _cset(:ec2ami_description, "AMI created by capistrano-ec2ami (#{Time.now})")
      _cset(:ec2ami_no_reboot, true)

      ######################################################################
      # def ec2
      #
      # Purpose: Creates a class variable for accessing AWS
      #
      # Returns: Fog::Compute::AWS
      ######################################################################
      def ec2
        @@ec2 = Fog::Compute::AWS.new(
          aws_secret_access_key: fetch(:aws_secret_access_key),
          aws_access_key_id: fetch(:aws_access_key_id)
        )
      end

      ######################################################################
      # def find_instance_id
      #
      # Purpose: Returns the instance ID for a particular IP address
      #
      # Returns: String
      ######################################################################
      def find_instance_id(address)
        ec2.servers.detect { |server|
          server if (server.public_ip_address == address) || (server.private_ip_address == address)
        }

      end

      ######################################################################
      # def create_ami
      #
      # Purpose: Facilitates the creation of an AMI on AWS's EC2 service
      #
      # Parameters:
      #   options<~Hash>
      #     name<~Symbol>: The name for the AMI
      #     description<~Symbol>: The description for the AMI
      #     no_reboot<~Boolean>: Whether or not to reboot the instance
      #
      # Returns: String
      ######################################################################
      def create_ami
        logger.info "\e[1;44m ## Creating AMI!\e[0m"
        instance = find_instance_id(roles[fetch(:ec2ami_role)].servers.sample.host).id

        ami_id = ec2.create_image(
          instance,
          fetch(:ec2ami_name),
          fetch(:ec2ami_description),
          fetch(:ec2ami_no_reboot)
        )

        logger.info "\e[1;44m Successfully created AMI: #{ami_id.body['imageId']}\e[0m"
      end

      namespace :ami do
        desc 'Creates an Amaazon EC2 AMI'
        task :create, once: true, roles: (fetch(:ec2ami_role) || :web) do
          create_ami
        end
      end

    end
  end

end