heat_template_version: 2016-10-14

description: >
  Utility stack to convert an array of services into a set of combined
  role configs.

parameters:
  Services:
    default: []
    description: |
        List nested stack service templates.
    type: comma_delimited_list
  ServiceNetMap:
    default: {}
    description: Mapping of service_name -> network name. Typically set
                 via parameter_defaults in the resource registry.  This
                 mapping overrides those in ServiceNetMapDefaults.
    type: json
  EndpointMap:
    default: {}
    description: Mapping of service endpoint -> protocol. Typically set
                 via parameter_defaults in the resource registry.
    type: json
  DefaultPasswords:
    default: {}
    description: Mapping of service -> default password. Used to help
                 pass top level passwords managed by Heat into services.
    type: json

resources:

  ServiceChain:
    type: OS::Heat::ResourceChain
    properties:
      resources: {get_param: Services}
      concurrent: true
      resource_properties:
        ServiceNetMap: {get_param: ServiceNetMap}
        EndpointMap: {get_param: EndpointMap}
        DefaultPasswords: {get_param: DefaultPasswords}

  LoggingConfiguration:
    type: OS::TripleO::LoggingConfiguration

outputs:
  role_data:
    description: Combined Role data for this set of services.
    value:
      service_names:
        # Filter any null/None service_names which may be present due to mapping
        # of services to OS::Heat::None
        yaql:
          expression: list($.data.s_names.where($ != null))
          data: {s_names: {get_attr: [ServiceChain, role_data, service_name]}}
      monitoring_subscriptions:
        yaql:
          expression: list($.data.role_data.where($ != null).select($.get('monitoring_subscription')).where($ != null))
          data: {role_data: {get_attr: [ServiceChain, role_data]}}
      logging_sources:
        # Transform the individual logging_source configuration from
        # each service in the chain into a global list, adding some
        # default configuration at the same time.
        yaql:
          expression: >
            let(
            default_format => $.data.default_format,
            pos_file_path => $.data.pos_file_path,
            sources => $.data.sources.flatten()
            ) ->
            $sources.where($ != null).select({
            'type' => 'tail',
            'tag' => $.tag,
            'path' => $.path,
            'format' => $.get('format', $default_format),
            'pos_file' => $.get('pos_file', $pos_file_path + '/' + $.tag + '.pos')
            })
          data:
            sources:
              - {get_attr: [LoggingConfiguration, LoggingDefaultSources]}
              - yaql:
                  expression: list($.data.role_data.where($ != null).select($.get('logging_source')).where($ != null))
                  data: {role_data: {get_attr: [ServiceChain, role_data]}}

              - {get_attr: [LoggingConfiguration, LoggingExtraSources]}
            default_format: {get_attr: [LoggingConfiguration, LoggingDefaultFormat]}
            pos_file_path: {get_attr: [LoggingConfiguration, LoggingPosFilePath]}
      logging_groups:
        # Build a list of unique groups to which we should add the
        # fluentd user.
        yaql:
          expression: >
            set($.data.groups.flatten()).where($)
          data:
            groups:
              - [{get_attr: [LoggingConfiguration, LoggingDefaultGroups]}]
              - yaql:
                  expression: list($.data.role_data.where($ != null).select($.get('logging_groups')).where($ != null))
                  data: {role_data: {get_attr: [ServiceChain, role_data]}}
              - [{get_attr: [LoggingConfiguration, LoggingExtraGroups]}]
      config_settings: {map_merge: {get_attr: [ServiceChain, role_data, config_settings]}}
      global_config_settings:
        map_merge:
          yaql:
            expression: list($.data.role_data.where($ != null).select($.get('global_config_settings')).where($ != null))
            data: {role_data: {get_attr: [ServiceChain, role_data]}}
      service_config_settings:
        yaql:
          expression: $.data.role_data.where($ != null).select($.get('service_config_settings')).where($ != null).reduce($1.mergeWith($2), {})
          data: {role_data: {get_attr: [ServiceChain, role_data]}}
      step_config: {list_join: ["\n", {get_attr: [ServiceChain, role_data, step_config]}]}
