Class: Chef::CookbookSynchronizer

Inherits:
Object
  • Object
show all
Defined in:
lib/chef/cookbook/synchronizer.rb

Overview

Synchronizes the locally cached copies of cookbooks with the files on the server.

Defined Under Namespace

Classes: CookbookFile

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cookbooks_by_name, events) ⇒ CookbookSynchronizer

Returns a new instance of CookbookSynchronizer.



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# File 'lib/chef/cookbook/synchronizer.rb', line 68

def initialize(cookbooks_by_name, events)
  @eager_segments = Chef::CookbookVersion::COOKBOOK_SEGMENTS.dup
  unless Chef::Config[:no_lazy_load]
    @eager_segments.delete(:files)
    @eager_segments.delete(:templates)
  end
  @eager_segments.freeze

  @cookbooks_by_name, @events = cookbooks_by_name, events

  @cookbook_full_file_paths = {}
  @remove_obsoleted_files = true
end

Instance Attribute Details

#remove_obsoleted_files ⇒ Object

Returns the value of attribute remove_obsoleted_files.



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# File 'lib/chef/cookbook/synchronizer.rb', line 66

def remove_obsoleted_files
  @remove_obsoleted_files
end

Instance Method Details

#cache ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 82

def cache
  Chef::FileCache
end

#cached_copy_up_to_date?(local_path, expected_checksum) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/cookbook/synchronizer.rb', line 264

def cached_copy_up_to_date?(local_path, expected_checksum)
  if cache.has_key?(local_path)
    current_checksum = CookbookVersion.checksum_cookbook_file(cache.load(local_path, false))
    expected_checksum == current_checksum
  else
    false
  end
end

#clear_obsoleted_cookbooks ⇒ Object

Iterates over cached cookbooks’ files, removing files belonging to cookbooks that don’t appear in cookbook_hash



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# File 'lib/chef/cookbook/synchronizer.rb', line 215

def clear_obsoleted_cookbooks
  @events.cookbook_clean_start

  if remove_obsoleted_files
    remove_old_cookbooks
  else
    Chef::Log.info("Skipping removal of obsoleted cookbooks from the cache")
    CookbookCacheCleaner.instance.skip_removal = true
  end

  remove_deleted_files

  @events.cookbook_clean_complete
end

#cookbook_count ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 94

def cookbook_count
  @cookbooks_by_name.size
end

#cookbook_names ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 86

def cookbook_names
  @cookbooks_by_name.keys
end

#cookbook_segment(cookbook_name, segment) ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 102

def cookbook_segment(cookbook_name, segment)
  @cookbooks_by_name[cookbook_name].manifest[segment]
end

#cookbooks ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 90

def cookbooks
  @cookbooks_by_name.values
end

#download_file(url, destination) ⇒ Object

Unconditionally download the file from the given URL. File will be downloaded to the path destination which is relative to the Chef file cache root.



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# File 'lib/chef/cookbook/synchronizer.rb', line 276

def download_file(url, destination)
  raw_file = server_api.get_rest(url, true)

  Chef::Log.info("Storing updated #{destination} in the cache.")
  cache.move_to(raw_file.path, destination)
end

#files ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 106

def files
  @files ||= cookbooks.inject([]) do |memo, cookbook|
    @eager_segments.each do |segment|
      cookbook.manifest[segment].each do |manifest_record|
        memo << CookbookFile.new(cookbook, segment, manifest_record)
      end
    end
    memo
  end
end

#files_by_cookbook ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 117

def files_by_cookbook
  files.group_by { |file| file.cookbook }
end

#files_remaining_by_cookbook ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 121

def files_remaining_by_cookbook
  @files_remaining_by_cookbook ||= begin
    files_by_cookbook.inject({}) do |memo, (cookbook, files)|
      memo[cookbook] = files.size
      memo
    end
  end
end

#have_cookbook?(cookbook_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/cookbook/synchronizer.rb', line 98

def have_cookbook?(cookbook_name)
  @cookbooks_by_name.key?(cookbook_name)
end

#mark_cached_file_valid(cache_filename) ⇒ Object

Marks the given file as valid (non-stale).



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# File 'lib/chef/cookbook/synchronizer.rb', line 284

def mark_cached_file_valid(cache_filename)
  CookbookCacheCleaner.instance.mark_file_as_valid(cache_filename)
end

#mark_file_synced(file) ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 130

def mark_file_synced(file)
  files_remaining_by_cookbook[file.cookbook] -= 1

  if files_remaining_by_cookbook[file.cookbook] == 0
    @events.synchronized_cookbook(file.cookbook.name)
  end
end

#remove_deleted_files ⇒ Object

remove deleted files in cookbooks that are being used on the node



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# File 'lib/chef/cookbook/synchronizer.rb', line 197

def remove_deleted_files
  cache.find(File.join(%w{cookbooks ** {*,.*}})).each do |cache_file|
    md = cache_file.match(/^cookbooks\/([^\/]+)\/([^\/]+)\/(.*)/)
    next unless md
    ( cookbook_name, segment, file ) = md[1..3]
    if have_cookbook?(cookbook_name)
      manifest_segment = cookbook_segment(cookbook_name, segment)
      if manifest_segment.select { |manifest_record| manifest_record["path"] == "#{segment}/#{file}" }.empty?
        Chef::Log.info("Removing #{cache_file} from the cache; its is no longer in the cookbook manifest.")
        cache.delete(cache_file)
        @events.removed_cookbook_file(cache_file)
      end
    end
  end
end

#remove_old_cookbooks ⇒ Object

remove cookbooks that are not referenced in the expanded run_list at all (if we have an override run_list we may not want to do this)



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# File 'lib/chef/cookbook/synchronizer.rb', line 185

def remove_old_cookbooks
  cache.find(File.join(%w{cookbooks ** {*,.*}})).each do |cache_file|
    cache_file =~ /^cookbooks\/([^\/]+)\//
    unless have_cookbook?($1)
      Chef::Log.info("Removing #{cache_file} from the cache; its cookbook is no longer needed on this client.")
      cache.delete(cache_file)
      @events.removed_cookbook_file(cache_file)
    end
  end
end

#save_full_file_path(file, full_path) ⇒ Object

Saves the full_path to the file of the cookbook to be updated in the manifest later



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# File 'lib/chef/cookbook/synchronizer.rb', line 177

def save_full_file_path(file, full_path)
  @cookbook_full_file_paths[file.cookbook] ||= { }
  @cookbook_full_file_paths[file.cookbook][file.segment] ||= [ ]
  @cookbook_full_file_paths[file.cookbook][file.segment] << full_path
end

#server_api ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 288

def server_api
  Chef::REST.new(Chef::Config[:chef_server_url])
end

#sync_cookbooks ⇒ Object

Synchronizes all the cookbooks from the chef-server. )

Returns

true

Always returns true



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# File 'lib/chef/cookbook/synchronizer.rb', line 142

def sync_cookbooks
  Chef::Log.info("Loading cookbooks [#{cookbooks.map {|ckbk| ckbk.name + '@' + ckbk.version}.join(', ')}]")
  Chef::Log.debug("Cookbooks detail: #{cookbooks.inspect}")

  clear_obsoleted_cookbooks

  queue = Chef::Util::ThreadedJobQueue.new

  files.each do |file|
    queue << lambda do |lock|
      full_file_path = sync_file(file)

      lock.synchronize {
        # Save the full_path of the downloaded file to be restored in the manifest later
        save_full_file_path(file, full_file_path)
        mark_file_synced(file)
      }
    end
  end

  @events.cookbook_sync_start(cookbook_count)
  queue.process(Chef::Config[:cookbook_sync_threads])
  # Update the full file paths in the manifest
  update_cookbook_filenames()

rescue Exception => e
  @events.cookbook_sync_failed(cookbooks, e)
  raise
else
  @events.cookbook_sync_complete
  true
end

#sync_file(file) ⇒ Object

Sync an individual file if needed. If there is an up to date copy locally, nothing is done. Updates file‘s manifest with the full path to the cached file.

Arguments

file<CookbookFile>

Returns

Full path to the cached file as a String



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# File 'lib/chef/cookbook/synchronizer.rb', line 246

def sync_file(file)
  cache_filename = File.join("cookbooks", file.cookbook.name, file.manifest_record['path'])
  mark_cached_file_valid(cache_filename)

  # If the checksums are different between on-disk (current) and on-server
  # (remote, per manifest), do the update. This will also execute if there
  # is no current checksum.
  if !cached_copy_up_to_date?(cache_filename, file.manifest_record['checksum'])
    download_file(file.manifest_record['url'], cache_filename)
    @events.updated_cookbook_file(file.cookbook.name, cache_filename)
  else
    Chef::Log.debug("Not storing #{cache_filename}, as the cache is up to date.")
  end

  # Load the file in the cache and return the full file path to the loaded file
  cache.load(cache_filename, false)
end

#update_cookbook_filenames ⇒ Object 



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# File 'lib/chef/cookbook/synchronizer.rb', line 230

def update_cookbook_filenames
  @cookbook_full_file_paths.each do |cookbook, file_segments|
    file_segments.each do |segment, full_paths|
      cookbook.replace_segment_filenames(segment, full_paths)
    end
  end
end