Class: OctocatalogDiff::Catalog

Inherits:
Object
  • Object
show all
Defined in:
lib/octocatalog-diff/catalog.rb,
lib/octocatalog-diff/catalog/json.rb,
lib/octocatalog-diff/catalog/noop.rb,
lib/octocatalog-diff/catalog/computed.rb,
lib/octocatalog-diff/catalog/puppetdb.rb,
lib/octocatalog-diff/catalog/puppetmaster.rb

Overview

Basic methods for interacting with a catalog. Generation of the catalog is handled via one of the supported backends listed above as ‘require_relative’. Usually, the ‘computed’ backend will build the catalog from the Puppet command.

Direct Known Subclasses

Computed, JSON, Noop, PuppetDB, PuppetMaster

Defined Under Namespace

Classes: Computed, JSON, Noop, PuppetDB, PuppetMaster

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Catalog

Constructor



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# File 'lib/octocatalog-diff/catalog.rb', line 23

def initialize(options = {})
  unless options.is_a?(Hash)
    raise ArgumentError, "#{self.class}.initialize requires hash argument, not #{options.class}"
  end
  @options = options

  # Basic settings
  @node = options[:node]
  @error_message = nil
  @catalog = nil
  @catalog_json = nil
  @retries = nil

  # The compilation directory can be overridden, e.g. when testing
  @override_compilation_dir = options[:compilation_dir]

  # Keep track of whether references have been validated yet. Allow this to be fudged for when we do
  # not desire reference validation to happen (e.g., for the "from" catalog that is otherwise valid).
  @references_validated = options[:references_validated] || false

  # Keep track of whether file resources have been converted.
  @file_resources_converted = false

  # Keep track of whether it's built yet
  @built = false
end

Instance Attribute Details

#built ⇒ Object (readonly)

Returns the value of attribute built.



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# File 'lib/octocatalog-diff/catalog.rb', line 20

def built
  @built
end

#catalog ⇒ Object (readonly)

Returns the value of attribute catalog.



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# File 'lib/octocatalog-diff/catalog.rb', line 20

def catalog
  @catalog
end

#catalog_json ⇒ Object

Returns the value of attribute catalog_json.



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# File 'lib/octocatalog-diff/catalog.rb', line 20

def catalog_json
  @catalog_json
end

#node ⇒ Object

Returns the value of attribute node.



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# File 'lib/octocatalog-diff/catalog.rb', line 19

def node
  @node
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/octocatalog-diff/catalog.rb', line 20

def options
  @options
end

Class Method Details

.create(options = {}) ⇒ OctocatalogDiff::Catalog::<?>

Guess the backend from the input and return the appropriate catalog object.

Parameters:

  • :backend (Symbol) —

    If set, this will force a backend

  • :json (String) —

    JSON catalog content (will avoid running Puppet to compile catalog)

  • :puppetdb (Object) —

    If set, pull the catalog from PuppetDB rather than building

  • :node (String) —

    Name of node whose catalog is being built

  • :fact_file (String) —

    OPTIONAL: Path to fact file (if not provided, look up in PuppetDB)

  • :hiera_config (String) —

    OPTIONAL: Path to hiera config file (munge temp. copy if not provided)

  • :basedir (String) —

    OPTIONAL: Base directory for catalog (default base directory of this checkout)

  • :pass_env_vars (Array<String>) —

    OPTIONAL: Additional environment vars to pass

  • :convert_file_resources (Boolean) —

    OPTIONAL: Convert file resource source to content

  • :storeconfigs (Boolean) —

    OPTIONAL: Pass the ‘-s’ flag, for puppetdb (storeconfigs) integration

Returns:



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# File 'lib/octocatalog-diff/catalog.rb', line 62

def self.create(options = {})
  # Hard-coded backend
  if options[:backend]
    return OctocatalogDiff::Catalog::JSON.new(options) if options[:backend] == :json
    return OctocatalogDiff::Catalog::PuppetDB.new(options) if options[:backend] == :puppetdb
    return OctocatalogDiff::Catalog::PuppetMaster.new(options) if options[:backend] == :puppetmaster
    return OctocatalogDiff::Catalog::Computed.new(options) if options[:backend] == :computed
    return OctocatalogDiff::Catalog::Noop.new(options) if options[:backend] == :noop
    raise ArgumentError, "Unknown backend :#{options[:backend]}"
  end

  # Determine backend based on arguments
  return OctocatalogDiff::Catalog::JSON.new(options) if options[:json]
  return OctocatalogDiff::Catalog::PuppetDB.new(options) if options[:puppetdb]
  return OctocatalogDiff::Catalog::PuppetMaster.new(options) if options[:puppet_master]

  # Default is to build catalog ourselves
  OctocatalogDiff::Catalog::Computed.new(options)
end

Instance Method Details

#build(logger = Logger.new(StringIO.new)) ⇒ Object

Build catalog - this method needs to be called to build the catalog. It is separate due to the serialization of the logger object – the parallel gem cannot serialize/deserialize a logger object so it cannot be part of any object that is passed around.

Parameters:

  • logger (Logger) (defaults to: Logger.new(StringIO.new)) —

    Logger object, initialized to a default throwaway value



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# File 'lib/octocatalog-diff/catalog.rb', line 86

def build(logger = Logger.new(StringIO.new))
  # If already built, don't build again
  return if @built
  @built = true

  # The resource hash is computed the first time it's needed. For now initialize it as nil.
  @resource_hash = nil

  # Invoke the backend's build method, if there is one. There's a stub below in case there's not.
  logger.debug "Calling build for object #{self.class}"
  build_catalog(logger)

  # Perform post-generation processing of the catalog
  return unless valid?

  validate_references
  return unless valid?

  convert_file_resources if @options[:compare_file_text]

  true
end

#build_catalog(_logger) ⇒ Object

Stub method if the backend does not contain a build method.



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# File 'lib/octocatalog-diff/catalog.rb', line 110

def build_catalog(_logger)
end

#builder ⇒ String

For logging we may wish to know the backend being used

Returns:

  • (String) —

    Class of backend used



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# File 'lib/octocatalog-diff/catalog.rb', line 121

def builder
  self.class.to_s
end

#compilation_dir ⇒ String

This retrieves the compilation directory from the catalog, or otherwise the passed-in directory.

Returns:

  • (String) —

    Compilation directory



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# File 'lib/octocatalog-diff/catalog.rb', line 134

def compilation_dir
  @override_compilation_dir || @options[:basedir]
end

#compilation_dir=(dir) ⇒ Object

The compilation directory can be overridden, e.g. during testing.

Parameters:

  • dir (String) —

    Compilation directory



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# File 'lib/octocatalog-diff/catalog.rb', line 140

def compilation_dir=(dir)
  @override_compilation_dir = dir
end

#convert_file_resources(_dry_run = false) ⇒ Object

Stub method for “convert_file_resources” – returns false because if the underlying class does not implement this method, it’s not supported.



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# File 'lib/octocatalog-diff/catalog.rb', line 146

def convert_file_resources(_dry_run = false)
  false
end

#environment ⇒ String

Compilation environment

Returns:

  • (String) —

    Compilation environment (if set), else ‘production’ by default



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# File 'lib/octocatalog-diff/catalog.rb', line 115

def environment
  @environment ||= 'production'
end

#error_message ⇒ String

Retrieve the error message.

Returns:

  • (String) —

    Error message (maximum 20,000 characters) - nil if no error.



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# File 'lib/octocatalog-diff/catalog.rb', line 152

def error_message
  build
  return nil if @error_message.nil? || !@error_message.is_a?(String)
  @error_message[0, 20_000]
end

#error_message=(error) ⇒ Object

Allow setting the error message. If the error message is set to a string, the catalog and catalog JSON are set to nil.

Parameters:

  • error (String) —

    Error message

Raises:

  • (ArgumentError) 


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# File 'lib/octocatalog-diff/catalog.rb', line 161

def error_message=(error)
  raise ArgumentError, 'Error message must be a string' unless error.is_a?(String)
  @error_message = error
  @catalog = nil
  @catalog_json = nil
  @resource_hash = nil
end

#puppet_version ⇒ String

Stub method to return the puppet version if the back end doesn’t support this.

Returns:



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# File 'lib/octocatalog-diff/catalog.rb', line 171

def puppet_version
  build
  @options[:puppet_version]
end

#resource(opts = {}) ⇒ Hash

This allows retrieving a resource by type and title. This is intended for use when a O(1) lookup is required.

Parameters:

  • :type (String) —

    Type of resource

  • :title (String) —

    Title of resource

Returns:

  • (Hash) —

    Resource item

Raises:

  • (ArgumentError) 


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# File 'lib/octocatalog-diff/catalog.rb', line 180

def resource(opts = {})
  raise ArgumentError, ':type and :title are required' unless opts[:type] && opts[:title]
  build
  build_resource_hash if @resource_hash.nil?
  return nil unless @resource_hash[opts[:type]].is_a?(Hash)
  @resource_hash[opts[:type]][opts[:title]]
end

#resources ⇒ Array

This is a compatibility layer for the resources, which are in a different place in Puppet 3.x and Puppet 4.x

Returns:

  • (Array) —

    Resource array

Raises:



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# File 'lib/octocatalog-diff/catalog.rb', line 190

def resources
  build
  raise OctocatalogDiff::Errors::CatalogError, 'Catalog does not appear to have been built' if !valid? && error_message.nil?
  raise OctocatalogDiff::Errors::CatalogError, error_message unless valid?
  # Handle the structure returned by the /puppet/v4/catalog Puppetserver endpoint:
  return @catalog['catalog']['resources'] if @catalog['catalog'].is_a?(Hash) && @catalog['catalog']['resources'].is_a?(Array)
  return @catalog['data']['resources'] if @catalog['data'].is_a?(Hash) && @catalog['data']['resources'].is_a?(Array)
  return @catalog['resources'] if @catalog['resources'].is_a?(Array)
  # This is a bug condition
  # :nocov:
  raise "BUG: catalog has no data::resources or ::resources array. Please report this. #{@catalog.inspect}"
  # :nocov:
end

#retries ⇒ Integer

Stub method of the the number of retries necessary to compile the catalog. If the underlying catalog generation backend does not support retries, nil is returned.

Returns:

  • (Integer) —

    Retry count



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# File 'lib/octocatalog-diff/catalog.rb', line 207

def retries
  nil
end

#valid? ⇒ Boolean

Determine if the catalog build was successful.

Returns:

  • (Boolean) —

    Whether the catalog is valid



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# File 'lib/octocatalog-diff/catalog.rb', line 213

def valid?
  build
  !@catalog.nil?
end

#validate_references ⇒ Object

Determine if all of the (before, notify, require, subscribe) targets are actually in the catalog. Raise a OctocatalogDiff::Errors::ReferenceValidationError for any found to be missing. Uses @options to influence which references are checked.



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# File 'lib/octocatalog-diff/catalog.rb', line 221

def validate_references
  # If we've already done the validation, don't do it again
  return if @references_validated
  @references_validated = true

  # Skip out early if no reference validation has been requested.
  unless @options[:validate_references].is_a?(Array) && @options[:validate_references].any?
    return
  end

  # Puppet 5 has reference validation built-in and enabled, so there won't even be a valid catalog if
  # there were invalid references. It's pointless to perform validation of our own.
  return if puppet_version && puppet_version >= '5.0.0'

  # Iterate over all the resources and check each one that has one of the attributes being checked.
  # Keep track of all references that are missing for ultimate inclusion in the error message.
  missing = []
  resources.each do |x|
    @options[:validate_references].each do |r|
      next unless x.key?('parameters')
      next unless x['parameters'].key?(r)
      missing_resources = resources_missing_from_catalog(x['parameters'][r])
      next unless missing_resources.any?
      missing.concat missing_resources.map { |missing_target| { source: x, target_type: r, target_value: missing_target } }
    end
  end
  return if missing.empty?

  # At this point there is at least one broken/missing reference. Format an error message and raise.
  errors = format_missing_references(missing)
  plural = errors =~ /;/ ? 's' : ''
  self.error_message = "Catalog has broken reference#{plural}: #{errors}"
end