Class: Chef::RunContext

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/chef/run_context.rb,
lib/chef/run_context/cookbook_compiler.rb

Overview

Value object that loads and tracks the context of a Chef run

Direct Known Subclasses

ChildRunContext

Defined Under Namespace

Classes: ChildRunContext, CookbookCompiler

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(node = nil, cookbook_collection = nil, events = nil, logger = nil) ⇒ RunContext

Creates a new Chef::RunContext object and populates its fields. This object gets used by the Chef Server to generate a fully compiled recipe list for a node.

Parameters:


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# File 'lib/chef/run_context.rb', line 191

def initialize(node = nil, cookbook_collection = nil, events = nil, logger = nil)
  @events = events
  @logger = logger || Chef::Log.with_child
  self.node = node if node
  self.cookbook_collection = cookbook_collection if cookbook_collection
  @definitions = {}
  @loaded_recipes_hash = {}
  @loaded_attributes_hash = {}
  @reboot_info = {}
  @cookbook_compiler = nil

  initialize_child_state
end

Instance Attribute Details

#action_collectionChef::ActionCollection

Handle to the global action_collection of executed actions for reporting / data_collector /etc

Returns:


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# File 'lib/chef/run_context.rb', line 125

def action_collection
  @action_collection
end

#before_notification_collectionHash[String, Array[Chef::Resource::Notification]] (readonly)

A Hash containing the before notifications triggered by resources during the converge phase of the chef run.

Returns:


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# File 'lib/chef/run_context.rb', line 141

def before_notification_collection
  @before_notification_collection
end

#cookbook_collectionChef::CookbookCollection

The set of cookbooks involved in this run


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# File 'lib/chef/run_context.rb', line 69

def cookbook_collection
  @cookbook_collection
end

#definitionsArray[Chef::ResourceDefinition] (readonly)

Resource Definitions for this run. Populated when the files in definitions/ are evaluated (this is triggered by #load).

Returns:


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# File 'lib/chef/run_context.rb', line 77

def definitions
  @definitions
end

#delayed_actionsArray[Chef::Resource::Notification] (readonly)

An Array containing the delayed (end of run) notifications triggered by resources during the converge phase of the chef run.

Returns:


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# File 'lib/chef/run_context.rb', line 164

def delayed_actions
  @delayed_actions
end

#delayed_notification_collectionHash[String, Array[Chef::Resource::Notification]] (readonly)

A Hash containing the delayed (end of run) notifications triggered by resources during the converge phase of the chef run.

Returns:


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# File 'lib/chef/run_context.rb', line 157

def delayed_notification_collection
  @delayed_notification_collection
end

#eventsChef::EventDispatch::Dispatcher

Event dispatcher for this run.


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# File 'lib/chef/run_context.rb', line 83

def events
  @events
end

#immediate_notification_collectionHash[String, Array[Chef::Resource::Notification]] (readonly)

A Hash containing the immediate notifications triggered by resources during the converge phase of the chef run.

Returns:


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# File 'lib/chef/run_context.rb', line 149

def immediate_notification_collection
  @immediate_notification_collection
end

#loggerObject (readonly)

A child of the root Chef::Log logging object.

Returns:

  • Mixlib::Log::Child A child logger


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# File 'lib/chef/run_context.rb', line 180

def logger
  @logger
end

#nodeChef::Node

The node for this run

Returns:


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# File 'lib/chef/run_context.rb', line 62

def node
  @node
end

#parent_run_contextChef::RunContext (readonly)

The parent run context.

Returns:

  • (Chef::RunContext)

    The parent run context, or `nil` if this is the root context.


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# File 'lib/chef/run_context.rb', line 100

def parent_run_context
  @parent_run_context
end

#reboot_infoHash

Hash of factoids for a reboot request.

Returns:

  • (Hash)

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# File 'lib/chef/run_context.rb', line 89

def reboot_info
  @reboot_info
end

#resource_collectionBoolean

Returns If the resource_collection is in unified_mode (no separate converge phase)

Returns:

  • (Boolean)

    If the resource_collection is in unified_mode (no separate converge phase)


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# File 'lib/chef/run_context.rb', line 119

def resource_collection
  @resource_collection
end

#restChef::ServerAPI

Common rest object for using to talk to the Chef Server, this strictly 'validates' utf8 and will throw. (will be nil on solo-legacy runs)

Returns:


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# File 'lib/chef/run_context.rb', line 48

def rest
  @rest
end

#rest_cleanChef::ServerAPI

Common rest object for using to talk to the Chef Server, this has utf8 sanitization turned on and will replace invalid utf8 with valid characters. (will be nil on solo-legacy runs)

Returns:


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# File 'lib/chef/run_context.rb', line 55

def rest_clean
  @rest_clean
end

#runnerObject

Pointer back to the Chef::Runner that created this


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# File 'lib/chef/run_context.rb', line 129

def runner
  @runner
end

#updated_resourcesObject (readonly)

A Set keyed by the string name, of all the resources that are updated. We do not track actions or individual resource objects, since this matches the behavior of the notification collections which are keyed by Strings.


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# File 'lib/chef/run_context.rb', line 170

def updated_resources
  @updated_resources
end

Instance Method Details

#add_delayed_action(notification) ⇒ Object

Adds a delayed action to the delayed_actions collection


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# File 'lib/chef/run_context.rb', line 283

def add_delayed_action(notification)
  if delayed_actions.any? { |existing_notification| existing_notification.duplicates?(notification) }
    logger.info( "#{notification.notifying_resource} not queuing delayed action #{notification.action} on #{notification.resource}"\
                   " (delayed), as it's already been queued")
  else
    delayed_actions << notification
  end
end

#before_notifications(resource) ⇒ Array[Notification]

Get the list of before notifications sent by the given resource.

Returns:

  • (Array[Notification])

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# File 'lib/chef/run_context.rb', line 296

def before_notifications(resource)
  key = resource.is_a?(String) ? resource : resource.declared_key
  before_notification_collection[key]
end

#cancel_rebootObject

Cancels a pending reboot


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# File 'lib/chef/run_context.rb', line 612

def cancel_reboot
  logger.info "Changing reboot status from #{reboot_info.inspect} to {}"
  @reboot_info = {}
end

#create_childObject

Create a child RunContext.


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# File 'lib/chef/run_context.rb', line 644

def create_child
  ChildRunContext.new(self)
end

#delayed_notifications(resource) ⇒ Array[Notification]

Get the list of delayed (end of run) notifications sent by the given resource.

Returns:

  • (Array[Notification])

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# File 'lib/chef/run_context.rb', line 328

def delayed_notifications(resource)
  key = resource.is_a?(String) ? resource : resource.declared_key
  delayed_notification_collection[key]
end

#has_cookbook_file_in_cookbook?(cookbook, cb_file_name) ⇒ Boolean

Find out if the cookbook has the given file.

Parameters:

  • cookbook (String)

    Cookbook name.

  • cb_file_name (String)

    File name.

Returns:

  • (Boolean)

    `true` if the file is in the cookbook, `false` otherwise.

See Also:


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# File 'lib/chef/run_context.rb', line 555

def has_cookbook_file_in_cookbook?(cookbook, cb_file_name)
  cookbook = cookbook_collection[cookbook]
  cookbook.has_cookbook_file_for_node?(node, cb_file_name)
end

#has_template_in_cookbook?(cookbook, template_name) ⇒ Boolean

Find out if the cookbook has the given template.

Parameters:

  • cookbook (String)

    Cookbook name.

  • template_name (String)

    Template name.

Returns:

  • (Boolean)

    `true` if the template is in the cookbook, `false` otherwise.

See Also:


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# File 'lib/chef/run_context.rb', line 540

def has_template_in_cookbook?(cookbook, template_name)
  cookbook = cookbook_collection[cookbook]
  cookbook.has_template_for_node?(node, template_name)
end

#immediate_notifications(resource) ⇒ Array[Notification]

Get the list of immediate notifications sent by the given resource.

Returns:

  • (Array[Notification])

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# File 'lib/chef/run_context.rb', line 305

def immediate_notifications(resource)
  key = resource.is_a?(String) ? resource : resource.declared_key
  immediate_notification_collection[key]
end

#include_recipe(*recipe_names, current_cookbook: nil) ⇒ Object

Evaluates the recipes recipe_names. Used by DSL::IncludeRecipe

Parameters:

  • recipe_names (Array[String])

    The list of recipe names (e.g. 'my_cookbook' or 'my_cookbook::my_resource').

  • current_cookbook

    The cookbook we are currently running in.

See Also:


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# File 'lib/chef/run_context.rb', line 346

def include_recipe(*recipe_names, current_cookbook: nil)
  result_recipes = []
  recipe_names.flatten.each do |recipe_name|
    if result = load_recipe(recipe_name, current_cookbook: current_cookbook)
      result_recipes << result
    end
  end
  result_recipes
end

#initialize_child_stateObject

Initialize state that applies to both Chef::RunContext and Chef::ChildRunContext


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# File 'lib/chef/run_context.rb', line 229

def initialize_child_state
  @resource_collection = Chef::ResourceCollection.new(self)
  @before_notification_collection = Hash.new { |h, k| h[k] = [] }
  @immediate_notification_collection = Hash.new { |h, k| h[k] = [] }
  @delayed_notification_collection = Hash.new { |h, k| h[k] = [] }
  @delayed_actions = []
  @updated_resources = Set.new
end

#load(run_list_expansion) ⇒ Object

Triggers the compile phase of the chef run.

Parameters:

See Also:


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# File 'lib/chef/run_context.rb', line 221

def load(run_list_expansion)
  @cookbook_compiler = CookbookCompiler.new(self, run_list_expansion, events)
  cookbook_compiler.compile
end

#load_recipe(recipe_name, current_cookbook: nil) ⇒ Object

Evaluates the recipe recipe_name. Used by DSL::IncludeRecipe

TODO I am sort of confused why we have both this and include_recipe …

I don't see anything different beyond accepting and returning an
array of recipes.

Parameters:

  • recipe_name (Array[String])

    The recipe name (e.g 'my_cookbook' or 'my_cookbook::my_resource').

  • current_cookbook (String)

    The cookbook we are currently running in.

Returns:

  • A truthy value if the load occurred; `false` if already loaded.

See Also:


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# File 'lib/chef/run_context.rb', line 371

def load_recipe(recipe_name, current_cookbook: nil)
  logger.trace("Loading recipe #{recipe_name} via include_recipe")

  cookbook_name, recipe_short_name = Chef::Recipe.parse_recipe_name(recipe_name, current_cookbook: current_cookbook)

  if unreachable_cookbook?(cookbook_name) # CHEF-4367
    logger.warn(<<~ERROR_MESSAGE)
      MissingCookbookDependency:
      Recipe `#{recipe_name}` is not in the run_list, and cookbook '#{cookbook_name}'
      is not a dependency of any cookbook in the run_list.  To load this recipe,
      first add a dependency on cookbook '#{cookbook_name}' in the cookbook you're
      including it from in that cookbook's metadata.
    ERROR_MESSAGE
  end

  if loaded_fully_qualified_recipe?(cookbook_name, recipe_short_name)
    logger.trace("I am not loading #{recipe_name}, because I have already seen it.")
    false
  else
    loaded_recipe(cookbook_name, recipe_short_name)
    node.loaded_recipe(cookbook_name, recipe_short_name)
    cookbook = cookbook_collection[cookbook_name]
    cookbook.load_recipe(recipe_short_name, self)
  end
end

#load_recipe_file(recipe_file) ⇒ Chef::Recipe

Load the given recipe from a filename.

Parameters:

  • recipe_file (String)

    The recipe filename.

Returns:

Raises:


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# File 'lib/chef/run_context.rb', line 406

def load_recipe_file(recipe_file)
  unless File.exist?(recipe_file)
    raise Chef::Exceptions::RecipeNotFound, "could not find recipe file #{recipe_file}"
  end

  logger.trace("Loading recipe file #{recipe_file}")
  recipe = Chef::Recipe.new("@recipe_files", recipe_file, self)
  recipe.from_file(recipe_file)
  recipe
end

#loaded_attribute(cookbook, attribute_file) ⇒ Object

Mark a given attribute file as having been loaded.

Parameters:

  • cookbook (String)

    Cookbook name.

  • attribute_file (String)

    Attribute file name.


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# File 'lib/chef/run_context.rb', line 523

def loaded_attribute(cookbook, attribute_file)
  loaded_attributes_hash["#{cookbook}::#{attribute_file}"] = true
end

#loaded_attributesArray[String]

A list of all attributes files that have been loaded.

Stored internally using a Hash, so order is predictable.

TODO is the above statement true in a 1.9+ ruby world? Is it relevant?

Returns:

  • (Array[String])

    A list of attribute file names in fully qualified form, e.g. the “nginx” will be given as “nginx::default”.


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# File 'lib/chef/run_context.rb', line 466

def loaded_attributes
  loaded_attributes_hash.keys
end

#loaded_fully_qualified_attribute?(cookbook, attribute_file) ⇒ Boolean

Find out if a given attribute file has been loaded.

Parameters:

  • cookbook (String)

    Cookbook name.

  • attribute_file (String)

    Attribute file name.

Returns:

  • (Boolean)

    `true` if the recipe has been loaded, `false` otherwise.


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# File 'lib/chef/run_context.rb', line 513

def loaded_fully_qualified_attribute?(cookbook, attribute_file)
  loaded_attributes_hash.key?("#{cookbook}::#{attribute_file}")
end

#loaded_fully_qualified_recipe?(cookbook, recipe) ⇒ Boolean

Find out if a given recipe has been loaded.

Parameters:

  • cookbook (String)

    Cookbook name.

  • recipe (String)

    Recipe name.

Returns:

  • (Boolean)

    `true` if the recipe has been loaded, `false` otherwise.


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# File 'lib/chef/run_context.rb', line 478

def loaded_fully_qualified_recipe?(cookbook, recipe)
  loaded_recipes_hash.key?("#{cookbook}::#{recipe}")
end

#loaded_recipe(cookbook, recipe) ⇒ Object

Mark a given recipe as having been loaded.

Parameters:

  • cookbook (String)

    Cookbook name.

  • recipe (String)

    Recipe name.


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# File 'lib/chef/run_context.rb', line 501

def loaded_recipe(cookbook, recipe)
  loaded_recipes_hash["#{cookbook}::#{recipe}"] = true
end

#loaded_recipe?(recipe) ⇒ Boolean

Find out if a given recipe has been loaded.

Parameters:

  • recipe (String)

    Recipe name. “nginx” and “nginx::default” yield the same results.

Returns:

  • (Boolean)

    `true` if the recipe has been loaded, `false` otherwise.


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# File 'lib/chef/run_context.rb', line 490

def loaded_recipe?(recipe)
  cookbook, recipe_name = Chef::Recipe.parse_recipe_name(recipe)
  loaded_fully_qualified_recipe?(cookbook, recipe_name)
end

#loaded_recipesArray[String]

A list of all recipes that have been loaded.

This is stored internally as a Hash, so ordering is predictable.

TODO is the above statement true in a 1.9+ ruby world? Is it relevant?

Returns:

  • (Array[String])

    A list of recipes in fully qualified form, e.g. the recipe “nginx” will be given as “nginx::default”.

See Also:


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# File 'lib/chef/run_context.rb', line 452

def loaded_recipes
  loaded_recipes_hash.keys
end

#notifies_before(notification) ⇒ Object

Adds an before notification to the before_notification_collection.

Parameters:


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# File 'lib/chef/run_context.rb', line 243

def notifies_before(notification)
  # Note for the future, notification.notifying_resource may be an instance
  # of Chef::Resource::UnresolvedSubscribes when calling {Resource#subscribes}
  # with a string value.
  if unified_mode && updated_resources.include?(notification.notifying_resource.declared_key)
    raise Chef::Exceptions::UnifiedModeBeforeSubscriptionEarlierResource.new(notification)
  end

  before_notification_collection[notification.notifying_resource.declared_key] << notification
end

#notifies_delayed(notification) ⇒ Object

Adds a delayed notification to the delayed_notification_collection.

Parameters:


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# File 'lib/chef/run_context.rb', line 271

def notifies_delayed(notification)
  # Note for the future, notification.notifying_resource may be an instance
  # of Chef::Resource::UnresolvedSubscribes when calling {Resource#subscribes}
  # with a string value.
  if unified_mode && updated_resources.include?(notification.notifying_resource.declared_key)
    add_delayed_action(notification)
  end
  delayed_notification_collection[notification.notifying_resource.declared_key] << notification
end

#notifies_immediately(notification) ⇒ Object

Adds an immediate notification to the immediate_notification_collection.

Parameters:


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# File 'lib/chef/run_context.rb', line 259

def notifies_immediately(notification)
  # Note for the future, notification.notifying_resource may be an instance
  # of Chef::Resource::UnresolvedSubscribes when calling {Resource#subscribes}
  # with a string value.
  immediate_notification_collection[notification.notifying_resource.declared_key] << notification
end

#open_stream(name: nil, **options) {|stream| ... } ⇒ EventDispatch::EventsOutputStream

Open a stream object that can be printed into and will dispatch to events

Parameters:

  • name (String)

    The name of the stream.

  • options (Hash)

    Other options for the stream.

Yields:

  • If a block is passed, it will be run and the stream will be closed afterwards.

Yield Parameters:

Returns:


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# File 'lib/chef/run_context.rb', line 584

def open_stream(name: nil, **options)
  stream = EventDispatch::EventsOutputStream.new(events, name: name, **options)
  if block_given?
    begin
      yield stream
    ensure
      stream.close
    end
  else
    stream
  end
end

#reboot_requested?Boolean

Checks to see if a reboot has been requested

Returns:

  • (Boolean)

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# File 'lib/chef/run_context.rb', line 621

def reboot_requested?
  reboot_info.size > 0
end

#request_reboot(reboot_info) ⇒ Object

there are options for how to handle multiple calls to these functions:

  1. first call always wins (never change reboot_info once set).

  2. last call always wins (happily change reboot_info whenever).

  3. raise an exception on the first conflict.

  4. disable reboot after this run if anyone ever calls :cancel.

  5. raise an exception on any second call.

  6. ?


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# File 'lib/chef/run_context.rb', line 604

def request_reboot(reboot_info)
  logger.info "Changing reboot status from #{self.reboot_info.inspect} to #{reboot_info.inspect}"
  @reboot_info = reboot_info
end

#resolve_attribute(cookbook_name, attr_file_name) ⇒ String

Look up an attribute filename.

Parameters:

  • cookbook_name (String)

    The cookbook name of the attribute file.

  • attr_file_name (String)

    The attribute file's name (not path).

Returns:

Raises:

See Also:


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# File 'lib/chef/run_context.rb', line 430

def resolve_attribute(cookbook_name, attr_file_name)
  cookbook = cookbook_collection[cookbook_name]
  raise Chef::Exceptions::CookbookNotFound, "could not find cookbook #{cookbook_name} while loading attribute #{name}" unless cookbook

  attribute_filename = cookbook.attribute_filenames_by_short_filename[attr_file_name]
  raise Chef::Exceptions::AttributeNotFound, "could not find filename for attribute #{attr_file_name} in cookbook #{cookbook_name}" unless attribute_filename

  attribute_filename
end

#reverse_immediate_notifications(resource) ⇒ Array[Notification]

Get the list of immeidate notifications pending to the given resource

Returns:

  • (Array[Notification])

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# File 'lib/chef/run_context.rb', line 314

def reverse_immediate_notifications(resource)
  immediate_notification_collection.map do |k, v|
    v.select do |n|
      (n.resource.is_a?(String) && n.resource == resource.declared_key) ||
        n.resource == resource
    end
  end.flatten
end

#root_run_contextChef::RunContext

The root run context.

Returns:


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# File 'lib/chef/run_context.rb', line 106

def root_run_context
  rc = self
  rc = rc.parent_run_context until rc.parent_run_context.nil?
  rc
end

#transportTrain::Plugins::Transport

Remote transport from Train

Returns:

  • (Train::Plugins::Transport)

    The child class for our train transport.


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# File 'lib/chef/run_context.rb', line 629

def transport
  @transport ||= Chef::TrainTransport.build_transport(logger)
end

#transport_connectionTrain::Plugins::Transport::BaseConnection

Remote connection object from Train

Returns:

  • (Train::Plugins::Transport::BaseConnection)

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# File 'lib/chef/run_context.rb', line 637

def transport_connection
  @transport_connection ||= transport.connection
end

#unreachable_cookbook?(cookbook_name) ⇒ Boolean

Find out whether the given cookbook is in the cookbook dependency graph.

Parameters:

  • cookbook_name (String)

    Cookbook name.

Returns:

  • (Boolean)

    `true` if the cookbook is reachable, `false` otherwise.

See Also:

  • CookbookCompiler#unreachable_cookbook?

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# File 'lib/chef/run_context.rb', line 568

def unreachable_cookbook?(cookbook_name)
  cookbook_compiler.unreachable_cookbook?(cookbook_name)
end