Class: CloudfoundryBlueGreenDeploy::BlueGreenDeploy

Inherits:
Object
  • Object
show all
Defined in:
lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb

Class Method Summary collapse

Class Method Details

.cf ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 11

def self.cf
  Cloudfoundry
end

.determine_target_color(hot_app_name) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 114

def self.determine_target_color(hot_app_name)
  target_color = get_color_stem(hot_app_name)
  BlueGreenDeployConfig.toggle_color(target_color)
end

.ensure_hot_instance_is_not_target(deploy_config, hot_app_name) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 83

def self.ensure_hot_instance_is_not_target(deploy_config, hot_app_name)
  if deploy_config.is_in_target?(hot_app_name)
    raise InvalidRouteStateError.new(
      "The app \"#{hot_app_name}\" is already hot (target color is #{deploy_config.target_color}).")
  end
end

.ensure_hot_workers_are_not_target(deploy_config) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 90

def self.ensure_hot_workers_are_not_target(deploy_config)
  apps = cf.apps

  deploy_config.target_worker_app_names.each do |hot_worker|
    if deploy_config.is_in_target?(hot_worker) && invalid_worker?(hot_worker, apps)
      raise InvalidWorkerStateError.new(
        "Worker #{hot_worker} is already hot (target color is #{deploy_config.target_color}).")
    end
  end
end

.ensure_there_is_a_hot_instance(deploy_config, hot_app_name) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 76

def self.ensure_there_is_a_hot_instance(deploy_config, hot_app_name)
  if hot_app_name.nil?
    raise InvalidRouteStateError.new(
      "There is no route mapped from #{deploy_config.hot_url} to an app.")
  end
end

.first_deploy?(hot_app_name, both_invalid_and_valid_hot_worker_names) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 72

def self.first_deploy?(hot_app_name, both_invalid_and_valid_hot_worker_names)
  hot_app_name.nil? && both_invalid_and_valid_hot_worker_names.empty?
end

.get_color_stem(hot_app_name) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 110

def self.get_color_stem(hot_app_name)
  hot_app_name.slice((hot_app_name.rindex('-') + 1)..(hot_app_name.length))
end

.get_hot_web_app(hot_url) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 129

def self.get_hot_web_app(hot_url)
  cf_routes = cf.routes
  hot_route = cf_routes.find { |route| route.host == hot_url }
  hot_route.nil? ? nil : hot_route.app
end

.get_hot_worker_names ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 135

def self.get_hot_worker_names
  cf_apps = cf.apps
  hot_names = []
  cf_apps.each do |app|
    hot_names << app.name if app.state == 'started'
  end
  hot_names
end

.invalid_worker?(hot_worker, apps) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 101

def self.invalid_worker?(hot_worker, apps)
  apps.each do |app|
    if app.name == hot_worker && app.state == 'started'
      return true
    end
  end
  return false
end

.make_hot(app_name, deploy_config) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 119

def self.make_hot(app_name, deploy_config)
  hot_url = deploy_config.hot_url
  hot_app = get_hot_web_app(hot_url)
  cold_app = deploy_config.target_web_app_name
  domain = deploy_config.domain

  cf.map_route(cold_app, domain, hot_url)
  cf.unmap_route(hot_app, domain, hot_url) if hot_app
end

.make_it_so(app_name, worker_apps, deploy_config) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 15

def self.make_it_so(app_name, worker_apps, deploy_config)
  hot_app_name = get_hot_web_app(deploy_config.hot_url)
  both_invalid_and_valid_hot_worker_names = get_hot_worker_names

  is_first_deploy = first_deploy?(hot_app_name, both_invalid_and_valid_hot_worker_names)

  deploy_config.target_color = set_target_color(is_first_deploy, hot_app_name)

  ready_for_takeoff(hot_app_name, both_invalid_and_valid_hot_worker_names, deploy_config)

  with_shutter = deploy_config.with_shutter
  hot_url = deploy_config.hot_url
  cold_app = deploy_config.target_web_app_name
  domain = deploy_config.domain
  shutter_app_name = deploy_config.shutter_app_name

  if with_shutter
    cf.push(shutter_app_name)
    cf.map_route(shutter_app_name, domain, hot_url)
    cf.unmap_route(hot_app_name, domain, hot_url) if hot_app_name
  end

  cf.push(cold_app)

  deploy_config.target_worker_app_names.each do |worker_app_name|
    cf.push(worker_app_name)
    unless is_first_deploy
      to_be_cold_worker = BlueGreenDeployConfig.toggle_app_color(worker_app_name)
      cf.stop(to_be_cold_worker)
    end
  end

  if with_shutter
    cf.map_route(cold_app, domain, hot_url)
    cf.unmap_route(shutter_app_name, domain, hot_url)
  else
    make_hot(app_name, deploy_config)
  end
end

.ready_for_takeoff(hot_app_name, both_invalid_and_valid_hot_worker_names, deploy_config) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 64

def self.ready_for_takeoff(hot_app_name, both_invalid_and_valid_hot_worker_names, deploy_config)
  unless first_deploy?(hot_app_name, both_invalid_and_valid_hot_worker_names)
    ensure_there_is_a_hot_instance(deploy_config, hot_app_name)
    ensure_hot_instance_is_not_target(deploy_config, hot_app_name)
    ensure_hot_workers_are_not_target(deploy_config)
  end
end

.set_target_color(is_first_deploy, hot_app_name) ⇒ Object 



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# File 'lib/cloudfoundry_blue_green_deploy/blue_green_deploy.rb', line 55

def self.set_target_color(is_first_deploy, hot_app_name)
  if is_first_deploy
    'blue'
  else
    determine_target_color(hot_app_name) unless hot_app_name.nil?
  end
end