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authorLovett, Trevor <trevor.lovett@att.com>2018-10-17 14:59:49 -0500
committerLovett, Trevor <trevor.lovett@att.com>2018-10-19 14:04:29 -0500
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treee264be2ef5da5314b6fb0094199cb24d2b9ce42c /docs/Chapter5/Heat/ONAP Heat Orchestration Templates: Overview.rst
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Also fixed couple formatting issues that were causing errors in the Sphinx job. Change-Id: Iae938e41d1d3746aa8faa1edbc652d68d9c7aa6e Issue-ID: VNFRQTS-447 Signed-off-by: Lovett, Trevor <trevor.lovett@att.com>
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-.. Licensed under a Creative Commons Attribution 4.0 International License.
-.. http://creativecommons.org/licenses/by/4.0
-.. Copyright 2017 AT&T Intellectual Property. All rights reserved.
-
-.. _ONAP Heat Orchestration Templates Overview:
-
-ONAP Heat Orchestration Templates Overview
------------------------------------------------
-
-ONAP supports a modular Heat Orchestration Template design pattern,
-referred to as *VNF Modularity.*
-
-ONAP VNF Modularity Overview
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-
-.. req::
- :id: R-69663
- :target: VNF
- :keyword: MAY
-
- A VNF **MAY** be composed from one or more Heat Orchestration
- Templates, each of which represents a subset of the overall VNF.
-
-The Heat Orchestration Templates can be thought of a components or modules of
-the VNF and are referred to as *VNF Modules*. During orchestration,
-these modules are
-deployed incrementally to create the complete VNF.
-
-
-.. req::
- :id: R-33132
- :target: VNF
- :keyword: MAY
-
- A VNF's Heat Orchestration Template **MAY** be
- 1.) Base Module Heat Orchestration Template (also referred to as a
- Base Module),
- 2.) Incremental Module Heat Orchestration Template (referred to as
- an Incremental Module), or
- 3.) a Cinder Volume Module Heat Orchestration Template (referred to as
- Cinder Volume Module).
-
-.. req::
- :id: R-37028
- :target: VNF
- :keyword: MUST
-
- A VNF **MUST** be composed of one Base Module
-
-.. req::
- :id: R-13196
- :target: VNF
- :keyword: MAY
-
- A VNF **MAY** be composed of zero to many Incremental Modules.
-
-.. req::
- :id: R-20974
- :target: VNF
- :keyword: MUST
-
- At orchestration time, the VNF's Base Module **MUST**
- be deployed first, prior to any incremental modules.
-
-.. req::
- :id: R-28980
- :target: VNF
- :keyword: MAY
-
- A VNF's incremental module **MAY** be used for initial VNF deployment only.
-
-.. req::
- :id: R-86926
- :target: VNF
- :keyword: MAY
-
- A VNF's incremental module **MAY** be used for scale out only.
-
-A VNF's Incremental Module that is used for scale out is deployed sometime
-after initial VNF deployment to add capacity.
-
-
-.. req::
- :id: R-91497
- :target: VNF
- :keyword: MAY
-
- A VNF's incremental module **MAY** be used for both deployment and
- scale out.
-
-.. req::
- :id: R-68122
- :target: VNF
- :keyword: MAY
-
- A VNF's incremental module **MAY** be deployed more than once,
- either during initial VNF deployment and/or scale out.
-
-.. req::
- :id: R-46119
- :target: VNF
- :keyword: MAY
-
- A VNF's Heat Orchestration Template's Resource OS::Heat::CinderVolume
- **MAY** be defined in a Base Module.
-
-.. req::
- :id: R-90748
- :target: VNF
- :keyword: MAY
-
- A VNF's Heat Orchestration Template's Resource OS::Heat::CinderVolume
- **MAY** be defined in an Incremental Module.
-
-.. req::
- :id: R-03251
- :target: VNF
- :keyword: MAY
-
- A VNF's Heat Orchestration Template's Resource OS::Heat::CinderVolume
- **MAY** be defined in a Cinder Volume Module.
-
-ONAP also supports the concept of an optional, independently deployed Cinder
-volume via a separate Heat Orchestration Templates, referred to as a Cinder
-Volume Module. This allows the volume to persist after a Virtual Machine
-(VM) (i.e., OS::Nova::Server) is deleted, allowing the volume to be reused
-on another instance (e.g., during a failover activity).
-
-.. req::
- :id: R-11200
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Cinder Volume Module, when it exists, **MUST** be 1:1
- with a Base module or Incremental module.
-
-It is strongly recommended that Cinder Volumes be created in a Cinder Volume
-Module.
-
-.. req::
- :id: R-38474
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Base Module **MUST** have a corresponding Environment File.
-
-.. req::
- :id: R-81725
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Incremental Module **MUST** have a corresponding Environment File
-
-.. req::
- :id: R-53433
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Cinder Volume Module **MUST** have a corresponding environment file
-
-These concepts will be described in more detail throughout the document.
-This overview is provided to set the stage and help clarify the concepts
-that will be introduced.
-
-Nested Heat Orchestration Templates Overview
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-ONAP supports nested Heat Orchestration Templates per OpenStack
-specifications.
-
-
-.. req::
- :id: R-36582
- :target: VNF
- :keyword: MAY
-
- A VNF's Base Module **MAY** utilize nested heat.
-
-.. req::
- :id: R-56721
- :target: VNF
- :keyword: MAY
-
- A VNF's Incremental Module **MAY** utilize nested heat.
-
-.. req::
- :id: R-30395
- :target: VNF
- :keyword: MAY
-
- A VNF's Cinder Volume Module **MAY** utilize nested heat.
-
-Nested templates may be suitable for larger VNFs that contain many
-repeated instances of the same VM type(s). A common usage pattern is to
-create a nested template for each VM type along with its supporting
-resources. The Heat Orchestration Template may then reference these
-nested templates either statically (by repeated definition) or
-dynamically (via OS::Heat::ResourceGroup).
-
-See :ref:`Nested Heat Templates` for additional details.
-
-ONAP Heat Orchestration Template Filenames
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-In order to enable ONAP to understand the relationship between Heat
-files, the following Heat file naming convention must be utilized.
-
-In the examples below, <text> represents any alphanumeric string that
-must not contain any special characters and must not contain the word
-"base".
-
-
-.. req::
- :id: R-87485
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Heat Orchestration Template's file extension **MUST**
- be in the lower case format ``.yaml`` or ``.yml``.
-
-.. req::
- :id: R-56438
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Heat Orchestration Template's Nested YAML file extension **MUST**
- be in the lower case format ``.yaml`` or ``.yml``.
-
-.. req::
- :id: R-74304
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Heat Orchestration Template's Environment file extension **MUST**
- be in the lower case format ``.env``.
-
-.. req::
- :id: R-99646
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's YAML files (i.e, Heat Orchestration Template files and
- Nested files) **MUST** have a unique name in the scope of the VNF.
-
-Base Modules
-~~~~~~~~~~~~
-
-
-.. req::
- :id: R-81339
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF Heat Orchestration Template's Base Module file name **MUST** include
- case insensitive 'base' in the filename and
- **MUST** match one of the following four
- formats:
-
- 1.) ``base_<text>.y[a]ml``
-
- 2.) ``<text>_base.y[a]ml``
-
- 3.) ``base.y[a]ml``
-
- 4.) ``<text>_base_<text>``.y[a]ml
-
- where ``<text>`` **MUST** contain only alphanumeric characters and
- underscores '_' and **MUST NOT** contain the case insensitive word ``base``.
-
-.. req::
- :id: R-91342
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF Heat Orchestration Template's Base Module's Environment File
- **MUST** be named identical to the VNF Heat Orchestration Template's
- Base Module with ``.y[a]ml`` replaced with ``.env``.
-
-Incremental Modules
-~~~~~~~~~~~~~~~~~~~
-
-
-.. req::
- :id: R-87247
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- VNF Heat Orchestration Template's Incremental Module file name
- **MUST** contain only alphanumeric characters and underscores
- '_' and **MUST NOT** contain the case insensitive word ``base``.
-
-.. req::
- :id: R-94509
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF Heat Orchestration Template's Incremental Module's Environment File
- **MUST** be named identical to the VNF Heat Orchestration Template's
- Incremental Module with ``.y[a]ml`` replaced with ``.env``.
-
-To clearly identify the incremental module, it is recommended to use the
-following naming options for modules:
-
- - ``module_<text>.y[a]ml``
-
- - ``<text>_module.y[a]ml``
-
- - ``module.y[a]ml``
-
- - ``<text>_module_<text>.y[a]ml``
-
-Cinder Volume Modules
-~~~~~~~~~~~~~~~~~~~~~
-
-
-.. req::
- :id: R-82732
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF Heat Orchestration Template's Cinder Volume Module **MUST**
- be named identical to the base or incremental module it is supporting with
- ``_volume`` appended.
-
-.. req::
- :id: R-31141
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- VNF Heat Orchestration Template's Cinder Volume Module's Environment File
- **MUST** be named identical to the VNF Heat Orchestration Template's
- Cinder Volume Module with ``.y[a]ml`` replaced with ``.env``.
-
-Nested Heat file
-~~~~~~~~~~~~~~~~
-
-
-.. req::
- :id: R-76057
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- VNF Heat Orchestration Template's Nested YAML file name **MUST** contain
- only alphanumeric characters and underscores '_' and
- **MUST NOT** contain the case insensitive word ``base``.
-
-.. req::
- :id: R-70276
- :target: VNF
- :keyword: MUST NOT
- :validation_mode: static
-
- A VNF HEAT's Orchestration Nested Template's YAML file name **MUST NOT**
- be in the format ``{vm-type}.y[a]ml`` where ``{vm-type}`` is defined
- in the Heat Orchestration Template.
-
-Examples include
-
- - ``<text>.y[a]ml``
-
- - ``nest_<text>.y[a]ml``
-
- - ``<text>_nest.y[a]ml``
-
- - ``nest.y[a]ml``
-
- - ``<text>_nest_<text>.y[a]ml``
-
-VNF Heat Orchestration Template's Nested YAML file does not have a
-corresponding environment files, per OpenStack specifications.
-
-.. _Output Parameters:
-
-Output Parameters
-^^^^^^^^^^^^^^^^^^^^^^
-
-The output parameters are parameters defined in the output section of a
-Heat Orchestration Template. The ONAP output parameters are subdivided
-into three categories:
-
-1. ONAP Base Module Output Parameters
-
-2. ONAP Volume Module Output Parameters
-
-3. ONAP Predefined Output Parameters.
-
-ONAP Base Module Output Parameters
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-ONAP Base Module Output Parameters are declared in the ``outputs:`` section
-of the VNF's Heat Orchestration Template's Base Module. A Base Module Output
-Parameter is available as an input parameter (i.e., declared in
-the ``parameters:`` section) to all Incremental Modules in the VNF.
-
-A Base Module Output Parameter may be used as an input parameter in any
-incremental module in the VNF. Note that the parameter is not available to
-other VNFs.
-
-
-.. req::
- :id: R-52753
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- VNF's Heat Orchestration Template's Base Module's output parameter's
- name and type **MUST** match the VNF's Heat Orchestration Template's
- incremental Module's name and type unless the output parameter is of
- type ``comma_delimited_list``, then the corresponding input parameter
- **MUST** be declared as type ``json``.
-
-If the Output parameter has a comma_delimited_list value (e.g., a collection
-of UUIDs from a Resource Group), then the corresponding input parameter must
-be declared as type ``json`` and not a ``comma_delimited_list``,
-which is actually a string value with embedded commas.
-
-
-.. req::
- :id: R-22608
- :target: VNF
- :keyword: MUST NOT
- :validation_mode: static
-
- When a VNF's Heat Orchestration Template's Base Module's output
- parameter is declared as an input parameter in an Incremental Module,
- the parameter attribute ``constraints:`` **MUST NOT** be declared.
-
-Additional details on ONAP Base Module Output Parameters are provided in
-:ref:`ONAP Output Parameter Names` and ONAP VNF Modularity.
-
-ONAP Volume Module Output Parameters
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-
-.. req::
- :id: R-89913
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Heat Orchestration Template's Cinder Volume Module Output
- Parameter(s)
- **MUST** include the
- UUID(s) of the Cinder Volumes created in template,
- while others **MAY** be included.
-
-A VNF's Heat Orchestration Template's Cinder Volume Module Output Parameter(s)
-are only available for the module (base or incremental) that the volume
-template is associated with.
-
-
-.. req::
- :id: R-07443
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Heat Orchestration Templates' Cinder Volume Module Output
- Parameter's name and type **MUST** match the input parameter name and type
- in the corresponding Base Module or Incremental Module unless the Output
- Parameter is of the type ``comma_delimited_list``, then the corresponding
- input parameter **MUST** be declared as type ``json``.
-
-If the Output parameter has a comma_delimited_list value (e.g., a collection
-of UUIDs from a Resource Group), then the corresponding input parameter must
-be declared as type json and not a comma_delimited_list, which is actually
-a string value with embedded commas.
-
-
-.. req::
- :id: R-20547
- :target: VNF
- :keyword: MUST NOT
- :validation_mode: static
-
- When an ONAP Volume Module Output Parameter is declared as an input
- parameter in a base or an incremental module Heat Orchestration
- Template, parameter constraints **MUST NOT** be declared.
-
-Additional details on ONAP Base Module Output Parameters are provided in
-:ref:`ONAP Output Parameter Names` and :ref:`ONAP Heat Cinder Volumes`.
-
-ONAP Predefined Output Parameters
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-ONAP will look for a small set of pre-defined Heat output parameters to
-capture resource attributes for inventory in ONAP. These output parameters
-are optional and currently only two parameters are supported. These output
-parameters are optional and are specified in
-:ref:`OAM Management IP Addresses`.
-
-Support of heat stack update
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-ONAP does not support the use of heat stack-update command for scaling
-(growth/de-growth).
-
-
-.. req::
- :id: R-39349
- :target: VNF
- :keyword: MUST NOT
- :validation_mode: static
-
- A VNF Heat Orchestration Template **MUST NOT** be designed to utilize the
- OpenStack ``heat stack-update`` command for scaling (growth/de-growth).
-
-.. req::
- :id: R-43413
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF **MUST** utilize a modular Heat Orchestration Template design to
- support scaling (growth/de-growth).
-
-It is important to note that ONAP only supports heat stack-update for
-image upgrades.
-
-Scope of a Heat Orchestration Template
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-
-.. req::
- :id: R-59482
- :target: VNF
- :keyword: MUST NOT
- :validation_mode: static
-
- A VNF's Heat Orchestration Template **MUST NOT** be VNF instance
- specific or cloud site specific.
-
-ONAP provides the instance specific parameter values to the Heat
-Orchestration Template at orchestration time.
-
-
-.. req::
- :id: R-01896
- :target: VNF
- :keyword: MUST
- :validation_mode: static
-
- A VNF's Heat Orchestration Template's parameter values that are constant
- across all deployments **MUST** be declared in a Heat Orchestration
- Template Environment File.
-
-