Class: Puppet::Transaction Private

Inherits:
Object show all
Includes:
Util, Util::Tagging
Defined in:
lib/puppet/transaction.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

the class that actually walks our resource/property tree, collects the changes, and performs them

Defined Under Namespace

Classes: AdditionalResourceGenerator, Event, EventManager, Report, ResourceHarness

Constant Summary

Constants included from Util::Tagging

Util::Tagging::ValidTagRegex

Constants included from Util

Util::AbsolutePathPosix, Util::AbsolutePathWindows, Util::DEFAULT_POSIX_MODE, Util::DEFAULT_WINDOWS_MODE

Constants included from Util::POSIX

Util::POSIX::LOCALE_ENV_VARS, Util::POSIX::USER_ENV_VARS

Constants included from Util::SymbolicFileMode

Util::SymbolicFileMode::SetGIDBit, Util::SymbolicFileMode::SetUIDBit, Util::SymbolicFileMode::StickyBit, Util::SymbolicFileMode::SymbolicMode, Util::SymbolicFileMode::SymbolicSpecialToBit

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Util::Tagging

#merge_into, #merge_tags, #raw_tagged?, #set_tags, #tag, #tag_if_valid, #tagged?, #tags=

Methods included from Util

absolute_path?, benchmark, chuser, deterministic_rand, deterministic_rand_int, exit_on_fail, logmethods, path_to_uri, pretty_backtrace, replace_file, safe_posix_fork, symbolizehash, thinmark, uri_to_path, which, withenv, withumask

Methods included from Util::POSIX

#get_posix_field, #gid, #idfield, #methodbyid, #methodbyname, #search_posix_field, #uid

Methods included from Util::SymbolicFileMode

#normalize_symbolic_mode, #symbolic_mode_to_int, #valid_symbolic_mode?

Constructor Details

#initialize(catalog, report, prioritizer) ⇒ Transaction

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Transaction.



34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
# File 'lib/puppet/transaction.rb', line 34

def initialize(catalog, report, prioritizer)
  @catalog = catalog

  @report = report || Puppet::Transaction::Report.new("apply", catalog.version, catalog.environment)

  @prioritizer = prioritizer

  @report.add_times(:config_retrieval, @catalog.retrieval_duration || 0)

  @event_manager = Puppet::Transaction::EventManager.new(self)

  @resource_harness = Puppet::Transaction::ResourceHarness.new(self)

  @prefetched_providers = Hash.new { |h,k| h[k] = {} }
end

Instance Attribute Details

#catalog ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



18
19
20
 
# File 'lib/puppet/transaction.rb', line 18

def catalog
  @catalog
end

#event_manager ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Routes and stores any events and subscriptions.



24
25
26
 
# File 'lib/puppet/transaction.rb', line 24

def event_manager
  @event_manager
end

#for_network_device ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



18
19
20
 
# File 'lib/puppet/transaction.rb', line 18

def for_network_device
  @for_network_device
end

#ignoreschedules ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



18
19
20
 
# File 'lib/puppet/transaction.rb', line 18

def ignoreschedules
  @ignoreschedules
end

#prefetched_providers ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



29
30
31
 
# File 'lib/puppet/transaction.rb', line 29

def prefetched_providers
  @prefetched_providers
end

#report ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The report, once generated.



21
22
23
 
# File 'lib/puppet/transaction.rb', line 21

def report
  @report
end

#resource_harness ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Handles most of the actual interacting with resources



27
28
29
 
# File 'lib/puppet/transaction.rb', line 27

def resource_harness
  @resource_harness
end

Instance Method Details

#any_failed? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Are there any failed resources in this transaction?

Returns:

  • (Boolean) 


164
165
166
 
# File 'lib/puppet/transaction.rb', line 164

def any_failed?
  report.resource_statuses.values.detect { |status| status.failed? }
end

#changed? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Find all of the changed resources.

Returns:

  • (Boolean) 


169
170
171
 
# File 'lib/puppet/transaction.rb', line 169

def changed?
  report.resource_statuses.values.find_all { |status| status.changed }.collect { |status| catalog.resource(status.resource) }
end

#evaluate(&block) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

This method does all the actual work of running a transaction. It collects all of the changes, executes them, and responds to any necessary events.



80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
 
# File 'lib/puppet/transaction.rb', line 80

def evaluate(&block)
  block ||= method(:eval_resource)
  generator = AdditionalResourceGenerator.new(@catalog, nil, @prioritizer)
  @catalog.vertices.each { |resource| generator.generate_additional_resources(resource) }

  perform_pre_run_checks

  Puppet.info "Applying configuration version '#{catalog.version}'" if catalog.version

  continue_while = lambda { !stop_processing? }

  post_evalable_providers = Set.new
  pre_process = lambda do |resource|
    prov_class = resource.provider.class
    post_evalable_providers << prov_class if prov_class.respond_to?(:post_resource_eval)

    prefetch_if_necessary(resource)

    # If we generated resources, we don't know what they are now
    # blocking, so we opt to recompute it, rather than try to track every
    # change that would affect the number.
    relationship_graph.clear_blockers if generator.eval_generate(resource)
  end

  providerless_types = []
  overly_deferred_resource_handler = lambda do |resource|
    # We don't automatically assign unsuitable providers, so if there
    # is one, it must have been selected by the user.
    return if missing_tags?(resource)
    if resource.provider
      resource.err "Provider #{resource.provider.class.name} is not functional on this host"
    else
      providerless_types << resource.type
    end

    resource_status(resource).failed = true
  end

  canceled_resource_handler = lambda do |resource|
    resource_status(resource).skipped = true
    resource.debug "Transaction canceled, skipping"
  end

  teardown = lambda do
    # Just once per type. No need to punish the user.
    providerless_types.uniq.each do |type|
      Puppet.err "Could not find a suitable provider for #{type}"
    end

    post_evalable_providers.each do |provider|
      begin
        provider.post_resource_eval
      rescue => detail
        Puppet.log_exception(detail, "post_resource_eval failed for provider #{provider}")
      end
    end
  end

  # Generate the relationship graph, set up our generator to use it
  # for eval_generate, then kick off our traversal.
  generator.relationship_graph = relationship_graph
  relationship_graph.traverse(:while => continue_while,
                              :pre_process => pre_process,
                              :overly_deferred_resource_handler => overly_deferred_resource_handler,
                              :canceled_resource_handler => canceled_resource_handler,
                              :teardown => teardown) do |resource|
    if resource.is_a?(Puppet::Type::Component)
      Puppet.warning "Somehow left a component in the relationship graph"
    else
      resource.info "Starting to evaluate the resource" if Puppet[:evaltrace] and @catalog.host_config?
      seconds = thinmark { block.call(resource) }
      resource.info "Evaluated in %0.2f seconds" % seconds if Puppet[:evaltrace] and @catalog.host_config?
    end
  end

  Puppet.debug "Finishing transaction #{object_id}"
end

#missing_tags?(resource) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Is this resource tagged appropriately?

Returns:

  • (Boolean) 


371
372
373
374
375
376
 
# File 'lib/puppet/transaction.rb', line 371

def missing_tags?(resource)
  return false if ignore_tags?
  return false if tags.empty?

  not resource.tagged?(*tags)
end

#perform_pre_run_checks ⇒ void

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

This method returns an undefined value.

Invoke the pre_run_check hook in every resource in the catalog. This should (only) be called by Transaction#evaluate before applying the catalog.

Raises:

See Also:



58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
 
# File 'lib/puppet/transaction.rb', line 58

def perform_pre_run_checks
  prerun_errors = {}

  @catalog.vertices.each do |res|
    begin
      res.pre_run_check
    rescue Puppet::Error => detail
      prerun_errors[res] = detail
    end
  end

  unless prerun_errors.empty?
    prerun_errors.each do |res, detail|
      res.log_exception(detail)
    end
    raise Puppet::Error, "Some pre-run checks failed"
  end
end

#prefetch_if_necessary(resource) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



188
189
190
191
192
193
194
195
196
197
198
199
200
201
 
# File 'lib/puppet/transaction.rb', line 188

def prefetch_if_necessary(resource)
  provider_class = resource.provider.class
  return unless provider_class.respond_to?(:prefetch) and !prefetched_providers[resource.type][provider_class.name]

  resources = resources_by_provider(resource.type, provider_class.name)

  if provider_class == resource.class.defaultprovider
    providerless_resources = resources_by_provider(resource.type, nil)
    providerless_resources.values.each {|res| res.provider = provider_class.name}
    resources.merge! providerless_resources
  end

  prefetch(provider_class, resources)
end

#relationship_graph ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



173
174
175
 
# File 'lib/puppet/transaction.rb', line 173

def relationship_graph
  catalog.relationship_graph(@prioritizer)
end

#resource_status(resource) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



177
178
179
 
# File 'lib/puppet/transaction.rb', line 177

def resource_status(resource)
  report.resource_statuses[resource.to_s] || add_resource_status(Puppet::Resource::Status.new(resource))
end

#skip?(resource) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Should this resource be skipped?

Returns:

  • (Boolean) 


341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
 
# File 'lib/puppet/transaction.rb', line 341

def skip?(resource)
  if missing_tags?(resource)
    resource.debug "Not tagged with #{tags.join(", ")}"
  elsif ! scheduled?(resource)
    resource.debug "Not scheduled"
  elsif failed_dependencies?(resource)
    # When we introduced the :whit into the graph, to reduce the combinatorial
    # explosion of edges, we also ended up reporting failures for containers
    # like class and stage.  This is undesirable; while just skipping the
    # output isn't perfect, it is RC-safe. --daniel 2011-06-07
    unless resource.class == Puppet::Type.type(:whit) then
      resource.warning "Skipping because of failed dependencies"
    end
  elsif resource.virtual?
    resource.debug "Skipping because virtual"
  elsif !host_and_device_resource?(resource) && resource.appliable_to_host? && for_network_device
    resource.debug "Skipping host resources because running on a device"
  elsif !host_and_device_resource?(resource) && resource.appliable_to_device? && !for_network_device
    resource.debug "Skipping device resources because running on a posix host"
  else
    return false
  end
  true
end

#stop_processing? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Wraps application run state check to flag need to interrupt processing

Returns:

  • (Boolean) 


159
160
161
 
# File 'lib/puppet/transaction.rb', line 159

def stop_processing?
  Puppet::Application.stop_requested? && catalog.host_config?
end

#tags ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The tags we should be checking.



182
183
184
185
186
 
# File 'lib/puppet/transaction.rb', line 182

def tags
  self.tags = Puppet[:tags] unless defined?(@tags)

  super
end