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.

Constant Summary collapse

EAGER_SEGMENTS =
Chef::CookbookVersion::COOKBOOK_SEGMENTS.dup

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 64

def initialize(cookbooks_by_name, events)
  @cookbooks_by_name, @events = cookbooks_by_name, events
end

Instance Method Details

#cacheObject


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

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 187

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_cookbooksObject

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 116

def clear_obsoleted_cookbooks
  @events.cookbook_clean_start
  # Remove all cookbooks no longer relevant to this node
  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
  @events.cookbook_clean_complete
end

#cookbook_countObject


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# File 'lib/chef/cookbook/synchronizer.rb', line 80

def cookbook_count
  @cookbooks_by_name.size
end

#cookbook_namesObject


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# File 'lib/chef/cookbook/synchronizer.rb', line 72

def cookbook_names
  @cookbooks_by_name.keys
end

#cookbooksObject


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# File 'lib/chef/cookbook/synchronizer.rb', line 76

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 199

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

#have_cookbook?(cookbook_name) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/cookbook/synchronizer.rb', line 84

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 207

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

#server_apiObject


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# File 'lib/chef/cookbook/synchronizer.rb', line 211

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

#sync_cookbook(cookbook) ⇒ Object

Sync the eagerly loaded files contained by cookbook

Arguments

cookbook<Chef::Cookbook>

The cookbook to update

valid_cache_entries<Hash>

Out-param; Added to this hash are the files that

were referred to by this cookbook


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# File 'lib/chef/cookbook/synchronizer.rb', line 136

def sync_cookbook(cookbook)
  Chef::Log.debug("Synchronizing cookbook #{cookbook.name}")

  # files and templates are lazily loaded, and will be done later.

  EAGER_SEGMENTS.each do |segment|
    segment_filenames = Array.new
    cookbook.manifest[segment].each do |manifest_record|

      cache_filename = sync_file_in_cookbook(cookbook, manifest_record)
      # make the segment filenames a full path.
      full_path_cache_filename = cache.load(cache_filename, false)
      segment_filenames << full_path_cache_filename
    end

    # replace segment filenames with a full-path one.
    if segment.to_sym == :recipes
      cookbook.recipe_filenames = segment_filenames
    elsif segment.to_sym == :attributes
      cookbook.attribute_filenames = segment_filenames
    else
      cookbook.segment_filenames(segment).replace(segment_filenames)
    end
  end
  @events.synchronized_cookbook(cookbook.name)
end

#sync_cookbooksObject

Synchronizes all the cookbooks from the chef-server. )

Returns

true

Always returns true


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# File 'lib/chef/cookbook/synchronizer.rb', line 92

def sync_cookbooks
  Chef::Log.info("Loading cookbooks [#{cookbook_names.sort.join(', ')}]")
  Chef::Log.debug("Cookbooks detail: #{cookbooks.inspect}")

  clear_obsoleted_cookbooks

  @events.cookbook_sync_start(cookbook_count)

  # Synchronize each of the node's cookbooks, and add to the
  # valid_cache_entries hash.
  cookbooks.each do |cookbook|
    sync_cookbook(cookbook)
  end

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

#sync_file_in_cookbook(cookbook, file_manifest) ⇒ Object

Sync an individual file if needed. If there is an up to date copy locally, nothing is done.

Arguments

file_manifest:

A Hash of the form => 'relative/path', “url” => “location to fetch the file”

Returns

Path to the cached file as a String


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# File 'lib/chef/cookbook/synchronizer.rb', line 170

def sync_file_in_cookbook(cookbook, file_manifest)
  cache_filename = File.join("cookbooks", cookbook.name, file_manifest['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['checksum'])
    download_file(file_manifest['url'], cache_filename)
    @events.updated_cookbook_file(cookbook.name, cache_filename)
  else
    Chef::Log.debug("Not storing #{cache_filename}, as the cache is up to date.")
  end

  cache_filename
end