Class: Builderator::Model::Images

Inherits:
Base
  • Object
show all
Defined in:
lib/builderator/model/images.rb

Overview

EC2 AMI Resources

Constant Summary collapse

LIMIT = 
24
PROPERTIES = 
%w(image_location state owner_id public architecture image_type
name description root_device_type virtualization_type
hypervisor)

Instance Attribute Summary

Attributes inherited from Base

#resources

Instance Method Summary collapse

Methods inherited from Base

#find, #initialize, #reject, #select, #unused

Constructor Details

This class inherits a constructor from Builderator::Model::Base

Instance Method Details

#fetch ⇒ Object 



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# File 'lib/builderator/model/images.rb', line 20

def fetch
  @resources = {}.tap do |i|
    Util.ec2.describe_images(:filters => [
      {
        :name => 'state',
        :values => %w(available)
      }
    ], :owners => %w(self)).each do |page|
      page.images.each do |image|
        properties = Util.from_tags(image.tags)
        properties['creation_date'] = DateTime.iso8601(image.creation_date)
        PROPERTIES.each { |pp| properties[pp] = image[pp.to_sym] }

        i[image.image_id] = {
          :id => image.image_id,
          :properties => properties,
          :snapshots => image.block_device_mappings.map { |b| b.ebs.snapshot_id rescue nil }.reject(&:nil?),
          :parent => properties.fetch('parent_ami', '(undefined)')
        }
      end
    end
  end
end

#in_use(options = {}) ⇒ Object 



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# File 'lib/builderator/model/images.rb', line 79

def in_use(options = {})
  {}.tap do |used|
    used.merge!(select(Model.instances.images))
    used.merge!(select(Model.launch_configs.images))
    used.merge!(latest(options))
    used.merge!(select(used.values.map { |i| i[:parent] }))
  end
end

#latest(options = {}) ⇒ Object 



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# File 'lib/builderator/model/images.rb', line 48

def latest(options = {})
  {}.tap do |latest|
    ## Group images
    group_by = options.fetch('group-by', [])
    groups = {}.tap do |g|
      break { 'all' => resources.values } if group_by.empty?

      resources.each do |_, image|
        (g[group_by.map do |gg|
          image[:properties].fetch(gg.to_s, '(unknown)')
        end.join(':')] ||= []) << image
      end
    end

    ## Sort each grouping
    sort_by = options.fetch('sort-by', 'creation_date')
    groups.each do |_, group|
      group.sort! { |a, b| b[:properties][sort_by] <=> a[:properties][sort_by] }
    end

    ## Slice to `keep` length
    keep = options.fetch('keep', 5)
    groups.each do |_, group|
      group.slice!(keep..-1)
    end

    ## Reduce
    groups.values.flatten.each { |i| latest[i[:id]] = i }
  end
end

#snapshots ⇒ Object 



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# File 'lib/builderator/model/images.rb', line 44

def snapshots
  resources.values.map { |i| i[:snapshots] }.flatten
end