The HostDomain type is not importable

[Herve Beraud]

When I try to use the HostDomain type by try to define a new config option based on it I obtain
the following exception:

AttributeError: module 'oslo_config.cfg' has no attribute 'HostDomain'

This type can't imported because no related config class have been defined in `oslo_config/cfg.py`
like did with other options [1].

https://opendev.org/openstack/oslo.config/src/branch/master/oslo_config/cfg.py

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/oslo.config/+/786394

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/oslo.config/+/786394
Committed: https://opendev.org/openstack/oslo.config/commit/bb5e4cbeb973c6341bf51eea2ebe5d38366167e8
Submitter: "Zuul (22348)"
Branch: master

commit bb5e4cbeb973c6341bf51eea2ebe5d38366167e8
Author: Hervé Beraud <email address hidden>
Date: Thu Apr 15 13:44:42 2021 +0200

    Adding the missing HostDomain config option

    The ``HostDomain`` config type have been added few months ago [1]
    however the config option have been forgotten and this new type
    isn't importable.

    When we try to import this type without defining a new related cfg
    option we get the following issue:

    ```
    AttributeError: module 'oslo_config.cfg' has no attribute 'HostDomain'
    ```

    These changes allow us to import this new type and allow us to use
    it in our configs:

    ```
    >>> from oslo_config import cfg
    >>> foo = cfg.HostDomain('foo')
    >>> foo.type.__call__("1")
    ...
    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "~/oslo.config/oslo_config/types.py", line 893, in __call__
         raise ValueError(
    ValueError: 1 is not a valid host address
    >>> foo.type.__call__("host_name")
    'host_name'
    ```

    Also properly initialize HostDomain because The HostDomain class wasn't
    calling super in it's __init__() method, which resulted in the type_name not
    being set properly for instances of that class.

    [1] https://opendev.org/openstack/oslo.config/commit/6480356928c9ae6169ea1e5a5b5f1df3d6e0dc75

    Change-Id: Ie947803f61ba0ef080018e0447de894a400d7975
    Closes-Bug: 1924283

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/wallaby
Review: https://review.opendev.org/c/openstack/oslo.config/+/788229

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/oslo.config 8.6.0 release.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/oslo.config/+/788229
Committed: https://opendev.org/openstack/oslo.config/commit/1074937e84a5d2b8f356260d4cc54497ee95cfe8
Submitter: "Zuul (22348)"
Branch: stable/wallaby

commit 1074937e84a5d2b8f356260d4cc54497ee95cfe8
Author: Hervé Beraud <email address hidden>
Date: Thu Apr 15 13:44:42 2021 +0200

    Adding the missing HostDomain config option

    The ``HostDomain`` config type have been added few months ago [1]
    however the config option have been forgotten and this new type
    isn't importable.

    When we try to import this type without defining a new related cfg
    option we get the following issue:

    ```
    AttributeError: module 'oslo_config.cfg' has no attribute 'HostDomain'
    ```

    These changes allow us to import this new type and allow us to use
    it in our configs:

    ```
    >>> from oslo_config import cfg
    >>> foo = cfg.HostDomain('foo')
    >>> foo.type.__call__("1")
    ...
    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "~/oslo.config/oslo_config/types.py", line 893, in __call__
         raise ValueError(
    ValueError: 1 is not a valid host address
    >>> foo.type.__call__("host_name")
    'host_name'
    ```

    Also properly initialize HostDomain because The HostDomain class wasn't
    calling super in it's __init__() method, which resulted in the type_name not
    being set properly for instances of that class.

    [1] https://opendev.org/openstack/oslo.config/commit/6480356928c9ae6169ea1e5a5b5f1df3d6e0dc75

    Change-Id: Ie947803f61ba0ef080018e0447de894a400d7975
    Closes-Bug: 1924283
    (cherry picked from commit bb5e4cbeb973c6341bf51eea2ebe5d38366167e8)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/victoria
Review: https://review.opendev.org/c/openstack/oslo.config/+/790610

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/oslo.config/+/790610
Committed: https://opendev.org/openstack/oslo.config/commit/dca54e4c1cf3c4d2674d146678fe08c021977358
Submitter: "Zuul (22348)"
Branch: stable/victoria

commit dca54e4c1cf3c4d2674d146678fe08c021977358
Author: Hervé Beraud <email address hidden>
Date: Thu Apr 15 13:44:42 2021 +0200

    Adding the missing HostDomain config option

    The ``HostDomain`` config type have been added few months ago [1]
    however the config option have been forgotten and this new type
    isn't importable.

    When we try to import this type without defining a new related cfg
    option we get the following issue:

    ```
    AttributeError: module 'oslo_config.cfg' has no attribute 'HostDomain'
    ```

    These changes allow us to import this new type and allow us to use
    it in our configs:

    ```
    >>> from oslo_config import cfg
    >>> foo = cfg.HostDomain('foo')
    >>> foo.type.__call__("1")
    ...
    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "~/oslo.config/oslo_config/types.py", line 893, in __call__
         raise ValueError(
    ValueError: 1 is not a valid host address
    >>> foo.type.__call__("host_name")
    'host_name'
    ```

    Also properly initialize HostDomain because The HostDomain class wasn't
    calling super in it's __init__() method, which resulted in the type_name not
    being set properly for instances of that class.

    [1] https://opendev.org/openstack/oslo.config/commit/6480356928c9ae6169ea1e5a5b5f1df3d6e0dc75

    Change-Id: Ie947803f61ba0ef080018e0447de894a400d7975
    Closes-Bug: 1924283
    (cherry picked from commit 1074937e84a5d2b8f356260d4cc54497ee95cfe8)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/ussuri
Review: https://review.opendev.org/c/openstack/oslo.config/+/793933

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/oslo.config 8.5.1 release.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/oslo.config 8.3.4 release.

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Stephen Finucane <email address hidden>" on branch: stable/ussuri
Review: https://review.opendev.org/c/openstack/oslo.config/+/793933
Reason: This branch is going into extended maintenance soon so I don't think we should be backporting this feature-like change. I'm going to abandon it. If anyone disagrees, please let me know and we can restore it.