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

Instance Method Summary collapse

Constructor Details

#initialize(os_compute, settings) ⇒ PromptsCreateInstance

Returns a new instance of PromptsCreateInstance.



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

def initialize(os_compute, settings)
  @os_compute = os_compute
  @settings = settings
end

Instance Method Details

#create_instance(instance_name) ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 9

def create_instance(instance_name)
  # 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 @os_compute.instances.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 = self.image

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

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

  # Prompt for userdata
  print "\nEnter a path to userdata for #{instance_name} or leave blank for no userdata: "
  file, userdata = self.userdata

  # Print summary and prompt to continue
  puts "\n================= Instance Summary ==================="
  puts "\nInstance Name: #{instance_name}"
  puts "        Linux: #{image.name}"
  puts "Instance Size: #{flavor.name}"
  puts "      Keypair: #{keypair.name}"
  puts "     UserData: #{file}"
  puts "\n --- UserData --- \n#{userdata}\n --- End UserData ---\n" if userdata
  puts "\n=============== End Instance Summary ================="
  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 = @os_compute.instances.create_instance(instance_name, image.id, flavor.id, keypair.name, userdata)
  else
    puts "Abandoning creation of #{instance_name}! Returning to chooser."
    instance = nil
  end

  instance_check = instance ? @os_compute.instances.check_instance(instance_name) : false
  if !instance
    return false
  elsif instance_check == true
    puts "Instance #{instance.name} is ready!"
    return instance
  elsif instance_check == false
    puts "Error: Could not create instance: #{instance_name}"
  end

  instance
end

#flavor ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 90

def flavor
  flavors_numbered = Helpers.array_to_numhash(@os_compute.flavors.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"
  @os_compute.flavors.get_flavor_by_name(flavor_name)
end

#image ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 74

def image
  images_numbered = Helpers.array_to_numhash(@os_compute.images.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"
  @os_compute.images.get_image_by_name(image_name)
end

#keypair ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 105

def keypair
  keypairs = Helpers.objects_to_numhash(@os_compute.keypairs.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 @os_compute.keypairs.create_keypair(keypair_name)
      else
        print 'Please enter an option from above: '
      end
    end
  end

  @os_compute.keypairs.get_keypair(keypair_name)
end

#userdata ⇒ Object 



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# File 'lib/danarchy_sys/cli/instance_manager/prompts_create_instance.rb', line 153

def userdata
  userdata = nil
  file = gets.chomp

  return ['-- no userdata --', nil] if file.empty?
  file = File.expand_path(file)
  userdata = File.exist?(file) ? File.read(file) : ''
  if userdata.empty?
    print 'File is empty!'
    userdata = editor(file)
  else
    puts userdata + "\n\n"
    print "Do any changes need to be made to '#{file}'? (Y/N): "

    if gets.chomp =~ /^y(es)?$/i
      userdata = editor(file)
    end
  end

  return [file, userdata]
end