Class: PromptsCreateInstance

Inherits:
Object
  • Object
show all
Defined in:
lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb

Overview

CLI Prompt to create a new instance

Class Method Summary collapse

Class Method Details

.create_instance(os_compute, instance_name) ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 4

def self.create_instance(os_compute, instance_name)
  comp_inst = os_compute.instances
  comp_imgs = os_compute.images
  comp_flvs = os_compute.flavors
  comp_keys = os_compute.keypairs

  # Prompt for and check that instance_name is unused
  if instance_name == 'nil'
    print "\nWhat should we name the instance?: "
    instance_name = gets.chomp
  end

  # Make sure instance_name isn't already in use
  until comp_inst.check_instance(instance_name) == false
    print "\n#{instance_name} already exists! Try another name: "
    instance_name = gets.chomp
  end

  puts "Creating instance: #{instance_name}"

  # Prompt for image
  puts "\nSelect an image (operating system) for #{instance_name}"
  image = PromptsCreateInstance.image(comp_imgs)

  # Prompt for flavor
  puts "\nSelect a flavor (instance size) for #{instance_name}"
  flavor = PromptsCreateInstance.flavor(comp_flvs)

  # Prompt for keypair
  puts "\nSelect a keypair (SSH key) for #{instance_name}"
  keypair = PromptsCreateInstance.keypair(comp_keys)

  # Print summary and prompt to continue
  puts "\nInstance Name: #{instance_name}"
  puts "        Linux: #{image.name}"
  puts "Instance Size: #{flavor.name}"
  puts "      Keypair: #{keypair.name}"

  print 'Should we continue with creating the instance? (Y/N): '
  instance = 'nil'
  continue = gets.chomp

  if continue =~ /^y(es)?$/i
    puts "Creating instance: #{instance_name}"
    instance = comp_inst.create_instance(instance_name, image.id, flavor.id, keypair.name)
  else
    puts "Abandoning creation of #{instance_name}"
    return false
  end

  instance_check = comp_inst.check_instance(instance_name)

  if instance_check == true
    puts "Instance #{instance.name} is ready!"
    return instance
  else
    raise "Error: Could not create instance: #{instance_name}" if instance_check == false
  end
end

.flavor(comp_flvs) ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 98

def self.flavor(comp_flvs)
  flavors = Helpers.objects_to_numhash(comp_flvs.all_flavors.sort_by(&:ram))
  flavor_name = 'nil'

  puts "\nAvailable Instance Flavors:"
  puts sprintf("%0s %-15s %-10s %-10s %0s", 'Id', 'Name', 'RAM', 'VCPUs', 'Disk')
  flavors.each do |id, flavor|
    print sprintf("%0s %-15s %-10s %-10s %0s\n",
                  "#{id}.", flavor[:name].split('.')[1], flavor[:ram], flavor[:vcpus], flavor[:disk])
  end

  print 'Which flavor should we use for this instance?: '
  flavor_check = false

  until flavor_check == true
    flavor_name = gets.chomp

    if flavor_name =~ /^[0-9]*$/
      until flavors.keys.include?(flavor_name.to_i)
        print "#{flavor_name} is not a valid Id. Enter an Id from above: "
        flavor_name = gets.chomp
      end

      flavor_name = flavors[flavor_name.to_i][:name].split('.')[1]
    end
    
    flavors.each_value do |flavor|
      flavor_check = true if flavor[:name].end_with?(flavor_name)
    end

    print "#{flavor_name} is not a valid flavor. Please enter an option from above: " if flavor_check == false
  end

  print "Flavor Name: #{flavor_name}\n"
  comp_flvs.get_flavor(flavor_name)
end

.image(comp_imgs) ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 64

def self.image(comp_imgs)
  images_numbered = Helpers.array_to_numhash(comp_imgs.list_images)
  image_name = 'nil'

  # List available images in a numbered hash.
  puts "\nAvailable Images:"
  i_name_length = Helpers.hash_largest_value(images_numbered).length
  printf("%0s %-#{i_name_length}s\n", 'Id', 'Image')
  images_numbered.each do |id, i_name|
    printf("%0s %-#{i_name_length}s\n", "#{id}.", i_name)
  end

  # Loop input until existing image is selected
  print 'Which image should we use for this instance?: '
  until images_numbered.values.include?(image_name)
    image_name = gets.chomp

    if image_name =~ /^[0-9]*$/
      until images_numbered.keys.include?(image_name.to_i)
        print "#{image_name} is not a valid Id. Enter an Id from above: "
        image_name = gets.chomp
      end

      image_name = images_numbered[image_name.to_i]
    end

    image_check = images_numbered.values.include?(image_name)
    print "#{image_name} is not a valid image. Please enter an option from above: " if image_check == false
  end

  print "Image Name: #{image_name}\n"
  comp_imgs.get_image_by_name(image_name)
end

.keypair(comp_keys) ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 135

def self.keypair(comp_keys)
  keypairs = Helpers.objects_to_numhash(comp_keys.all_keypairs)
  keypair_name = 'nil'

  # List available keypairs
  puts "\nAvailable Keypairs:"
  print sprintf("%0s %-15s\n", 'Id', 'KeyPair Name')
  keypairs.each do |id, key|
    print sprintf("%0s %-15s\n", "#{id}.", key[:name])
  end

  # Loop input until existing flavor is selected or create a new one
  print 'Enter a keypair to use for this instance or enter a name for a new keypair : '
  keypair_check = false

  until keypair_check == true
    keypair_name = gets.chomp

    # Accept keypair Id as an entry
    if keypair_name =~ /^[0-9]*$/
      until keypairs.keys.include?(keypair_name.to_i)
        print "#{keypair_name} is not a valid Id.
Enter an Id from above, or \'return\' to restart keypair selection. : "
        keypair_name = gets.chomp
        return keypair(settings, compute) if keypair_name == 'return'
      end

      keypair_name = keypairs[keypair_name.to_i][:name]
    end

    keypair_check = Helpers.check_nested_hash_value(keypairs, :name, keypair_name)

    if keypair_check == false
      print "#{keypair_name} is not an existing keypair.
Should we create a new keypair named #{keypair_name}? (Y/N): "

      if gets.chomp =~ /^y(es)?$/i
        puts "Creating keypair: #{keypair_name}!"
        return comp_keys.create_keypair(keypair_name)
      else
        print 'Please enter an option from above: '
      end
    end
  end

  comp_keys.get_keypair(keypair_name)
end