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 80

def self.flavor(comp_flvs)
  flavors_numbered = Helpers.array_to_numhash(comp_flvs.all_flavors.sort_by(&:ram))

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

  flavor_name = item_chooser(flavors_numbered, 'flavor')
  print "Flavor Name: #{flavor_name.split('.')[1]}\n"
  comp_flvs.get_flavor_by_name(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.all_images)

  # List available images in a numbered hash.
  puts "\nAvailable Images:"
  i_name_length = images_numbered.values.collect{|i| i.name}.max.size
  printf("%0s %-#{i_name_length}s\n", 'Id', 'Image')
  images_numbered.each do |id, image|
    printf("%0s %-#{i_name_length}s\n", "#{id}.", image.name)
  end

  image_name = item_chooser(images_numbered, 'image')
  print "Image Name: #{image_name}\n"
  comp_imgs.get_image_by_name(image_name)
end

.item_chooser(items_numbered, item) ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 144

def self.item_chooser(items_numbered, item)
  # Loop input until existing object is selected
  item_name = nil
  print "Which #{item} should we use for this instance?: "

  until items_numbered.values.collect{|i| i.name}.include?(item_name)
    item_name = gets.chomp

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

      item_name = items_numbered[item_name.to_i].name
    end

    item_check = items_numbered.values.collect{|i| i.name}.include?(item_name)
    print "#{item_name} is not a valid item. Please enter an option from above: " if item_check == false
  end
  item_name
end

.keypair(comp_keys) ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 95

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