Class: Capistrano::ASG::Rolling::LaunchTemplates

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/capistrano/asg/rolling/launch_templates.rb

Overview

Collection of Launch Templates.

Instance Method Summary collapse

Constructor Details

#initialize(templates = []) ⇒ LaunchTemplates

Returns a new instance of LaunchTemplates.



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# File 'lib/capistrano/asg/rolling/launch_templates.rb', line 10

def initialize(templates = [])
  @templates = Set.new(templates)
end

Instance Method Details

#<<(template) ⇒ Object 



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# File 'lib/capistrano/asg/rolling/launch_templates.rb', line 14

def <<(template)
  @templates << template
end

#each ⇒ Object 



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# File 'lib/capistrano/asg/rolling/launch_templates.rb', line 22

def each(&)
  @templates.each(&)
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/capistrano/asg/rolling/launch_templates.rb', line 26

def empty?
  @templates.empty?
end

#merge(templates) ⇒ Object 



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# File 'lib/capistrano/asg/rolling/launch_templates.rb', line 18

def merge(templates)
  @templates.merge(templates)
end

#update(amis:, description: nil) ⇒ Object

For each AMI, find templates still pointing at the old image it was built from, then create new template versions referencing the new AMI in parallel.

Returns LaunchTemplates containing only the newly created versions.



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# File 'lib/capistrano/asg/rolling/launch_templates.rb', line 34

def update(amis:, description: nil)
  template_image_pairs = amis.flat_map do |ami|
    old_image_id = ami.instance.image_id
    new_image_id = ami.id

    with_image(old_image_id).map { |template| [template, new_image_id] }
  end

  updated_templates = Parallel.run(template_image_pairs) do |template, new_image_id|
    template.create_version(image_id: new_image_id, description: description)
  end

  self.class.new(updated_templates)
end