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.. _porting_2.8_guide:
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*************************
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Ansible 2.8 Porting Guide
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*************************
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This section discusses the behavioral changes between Ansible 2.7 and Ansible 2.8.
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It is intended to assist in updating your playbooks, plugins and other parts of your Ansible infrastructure so they will work with this version of Ansible.
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We suggest you read this page along with `Ansible Changelog for 2.8 <https://github.com/ansible/ansible/blob/stable-2.8/changelogs/CHANGELOG-v2.8.rst>`_ to understand what updates you may need to make.
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This document is part of a collection on porting. The complete list of porting guides can be found at :ref:`porting guides <porting_guides>`.
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.. contents:: Topics
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Playbook
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========
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Distribution Facts
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------------------
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The information returned for the ``ansible_distribution_*`` group of facts may have changed
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slightly. Ansible 2.8 uses a new backend library for information about distributions: `nir0s/distro <https://github.com/nir0s/distro>`_. This library runs on Python-3.8 and fixes many bugs, including correcting release and version names.
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The two facts used in playbooks most often, ``ansible_distribution`` and ``ansible_distribution_major_version``, should not change. If you discover a change in these facts, please file a bug so we can address the
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difference. However, other facts like ``ansible_distribution_release`` and
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``ansible_distribution_version`` may change as erroneous information gets corrected.
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Imports as handlers
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-------------------
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Beginning in version 2.8, a task cannot notify ``import_tasks`` or a static ``include`` that is specified in ``handlers``.
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The goal of a static import is to act as a pre-processor, where the import is replaced by the tasks defined within the imported file. When
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using an import, a task can notify any of the named tasks within the imported file, but not the name of the import itself.
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To achieve the results of notifying a single name but running multiple handlers, utilize ``include_tasks``, or ``listen`` :ref:`handlers`.
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Jinja Undefined values
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----------------------
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Beginning in version 2.8, attempting to access an attribute of an Undefined value in Jinja will return another Undefined value, rather than throwing an error immediately. This means that you can now simply use
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a default with a value in a nested data structure when you don't know if the intermediate values are defined.
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In Ansible 2.8::
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{{ foo.bar.baz | default('DEFAULT') }}
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In Ansible 2.7 and older::
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{{ ((foo | default({})).bar | default({})).baz | default('DEFAULT') }}
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or
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{{ foo.bar.baz if (foo is defined and foo.bar is defined and foo.bar.baz is defined) else 'DEFAULT' }}
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Module option conversion to string
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----------------------------------
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Beginning in version 2.8, Ansible will warn if a module expects a string, but a non-string value is passed and automatically converted to a string. This highlights potential problems where, for example, a ``yes`` or ``true`` (parsed as truish boolean value) would be converted to the string ``'True'``, or where a version number ``1.10`` (parsed as float value) would be converted to ``'1.0'``. Such conversions can result in unexpected behavior depending on context.
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This behavior can be changed to be an error or to be ignored by setting the ``ANSIBLE_STRING_CONVERSION_ACTION`` environment variable, or by setting the ``string_conversion_action`` configuration in the ``defaults`` section of ``ansible.cfg``.
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Command line facts
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------------------
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``cmdline`` facts returned in system will be deprecated in favor of ``proc_cmdline``. This change handles special case where Kernel command line parameter contains multiple values with the same key.
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Python Interpreter Discovery
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============================
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In Ansible 2.7 and earlier, Ansible defaulted to ``usr/bin/python`` as the
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setting for ``ansible_python_interpreter``. If you ran Ansible against a system
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that installed Python with a different name or a different path, your playbooks
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would fail with ``/usr/bin/python: bad interpreter: No such file or directory``
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unless you either set ``ansible_python_interpreter`` to the correct value for
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that system or added a Python interpreter and any necessary dependencies at
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``usr/bin/python``.
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Starting in Ansible 2.8, Ansible searches for the correct path and executable
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name for Python on each target system, first in a lookup table of default
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Python interpreters for common distros, then in an ordered fallback list of
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possible Python interpreter names/paths.
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It's risky to rely on a Python interpreter set from the fallback list, because
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the interpreter may change on future runs. If an interpreter from
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higher in the fallback list gets installed (for example, as a side-effect of
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installing other packages), your original interpreter and its dependencies will
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no longer be used. For this reason, Ansible warns you when it uses a Python
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interpreter discovered from the fallback list. If you see this warning, the
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best solution is to explicitly set ``ansible_python_interpreter`` to the path
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of the correct interpreter for those target systems.
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You can still set ``ansible_python_interpreter`` to a specific path at any
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variable level (as a host variable, in vars files, in playbooks, etc.).
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If you prefer to use the Python interpreter discovery behavior, use
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one of the four new values for ``ansible_python_interpreter`` introduced in
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Ansible 2.8:
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+---------------------------+-----------------------------------------------+
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| New value | Behavior |
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+===========================+===============================================+
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| | auto | | If a Python interpreter is discovered, |
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| | (future default) | | Ansible uses the discovered Python, even if |
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| | | | ``/usr/bin/python`` is also present. Warns |
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| | | | when using the fallback list. |
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+---------------------------+-----------------------------------------------+
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| | **auto_legacy** | | If a Python interpreter is discovered, and |
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| | (Ansible 2.8 default) | | ``/usr/bin/python`` is absent, Ansible |
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| | | | uses the discovered Python. Warns when |
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| | | | using the fallback list. |
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| | | | |
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| | | | If a Python interpreter is discovered, and |
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| | | | ``/usr/bin/python`` is present, Ansible |
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| | | | uses ``/usr/bin/python`` and prints a |
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| | | | deprecation warning about future default |
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| | | | behavior. Warns when using the fallback |
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| | | | list. |
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+---------------------------+-----------------------------------------------+
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| | auto_legacy_silent | | Behaves like ``auto_legacy`` but suppresses |
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| | | | the deprecation and fallback-list warnings. |
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+---------------------------+-----------------------------------------------+
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| | auto_silent | | Behaves like ``auto`` but suppresses the |
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| | | | fallback-list warning. |
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+---------------------------+-----------------------------------------------+
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Starting with Ansible 2.12, Ansible will use the discovered Python interpreter
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by default, whether or not ``/usr/bin/python`` is also present. Until then,
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the default ``auto_legacy`` setting provides compatibility with
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previous versions of Ansible that always defaulted to ``/usr/bin/python``.
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If you installed Python and dependencies (``boto``, etc.) to
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``/usr/bin/python`` as a workaround on distros with a different default Python
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interpreter (for example, Ubuntu 16.04+, RHEL8, Fedora 23+), you have two
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options:
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#. Move existing dependencies over to the default Python for each platform/distribution/version.
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#. Use ``auto_legacy``. This setting lets Ansible find and use the workaround Python on hosts that have it, while also finding the correct default Python on newer hosts. But remember, the default will change in 4 releases.
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Retry File Creation default
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---------------------------
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In Ansible 2.8, ``retry_files_enabled`` now defaults to ``False`` instead of ``True``. The behavior can be
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modified to previous version by editing the default ``ansible.cfg`` file and setting the value to ``True``.
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Command Line
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============
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Become Prompting
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----------------
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Beginning in version 2.8, by default Ansible will use the word ``BECOME`` to prompt you for a password for elevated privileges (``sudo`` privileges on Unix systems or ``enable`` mode on network devices):
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By default in Ansible 2.8::
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ansible-playbook --become --ask-become-pass site.yml
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BECOME password:
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If you want the prompt to display the specific ``become_method`` you're using, instead of the agnostic value ``BECOME``, set :ref:`AGNOSTIC_BECOME_PROMPT` to ``False`` in your Ansible configuration.
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By default in Ansible 2.7, or with ``AGNOSTIC_BECOME_PROMPT=False`` in Ansible 2.8::
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ansible-playbook --become --ask-become-pass site.yml
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SUDO password:
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Deprecated
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==========
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* Setting the async directory using ``ANSIBLE_ASYNC_DIR`` as an task/play environment key is deprecated and will be
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removed in Ansible 2.12. You can achieve the same result by setting ``ansible_async_dir`` as a variable like::
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- name: run task with custom async directory
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command: sleep 5
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async: 10
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vars:
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ansible_async_dir: /tmp/.ansible_async
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* Plugin writers who need a ``FactCache`` object should be aware of two deprecations:
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1. The ``FactCache`` class has moved from ``ansible.plugins.cache.FactCache`` to
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``ansible.vars.fact_cache.FactCache``. This is because the ``FactCache`` is not part of the
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cache plugin API and cache plugin authors should not be subclassing it. ``FactCache`` is still
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available from its old location but will issue a deprecation warning when used from there. The
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old location will be removed in Ansible 2.12.
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2. The ``FactCache.update()`` method has been converted to follow the dict API. It now takes a
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dictionary as its sole argument and updates itself with the dictionary's items. The previous
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API where ``update()`` took a key and a value will now issue a deprecation warning and will be
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removed in 2.12. If you need the old behavior switch to ``FactCache.first_order_merge()``
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instead.
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* Supporting file-backed caching via self.cache is deprecated and will
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be removed in Ansible 2.12. If you maintain an inventory plugin, update it to use ``self._cache`` as a dictionary. For implementation details, see
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the :ref:`developer guide on inventory plugins<inventory_plugin_caching>`.
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* Importing cache plugins directly is deprecated and will be removed in Ansible 2.12. Use the plugin_loader
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so direct options, environment variables, and other means of configuration can be reconciled using the config
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system rather than constants.
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.. code-block:: python
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from ansible.plugins.loader import cache_loader
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cache = cache_loader.get('redis', **kwargs)
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Modules
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=======
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Major changes in popular modules are detailed here
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The exec wrapper that runs PowerShell modules has been changed to set ``$ErrorActionPreference = "Stop"`` globally.
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This may mean that custom modules can fail if they implicitly relied on this behavior. To get the old behavior back,
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add ``$ErrorActionPreference = "Continue"`` to the top of the module. This change was made to restore the old behavior
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of the EAP that was accidentally removed in a previous release and ensure that modules are more resilient to errors
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that may occur in execution.
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Modules removed
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---------------
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The following modules no longer exist:
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* ec2_remote_facts
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* azure
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* cs_nic
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* netscaler
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* win_msi
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Deprecation notices
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-------------------
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The following modules will be removed in Ansible 2.12. Please update your playbooks accordingly.
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* ``foreman`` use `foreman-ansible-modules <https://github.com/theforeman/foreman-ansible-modules>`_ instead.
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* ``katello`` use `foreman-ansible-modules <https://github.com/theforeman/foreman-ansible-modules>`_ instead.
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* ``github_hooks`` use :ref:`github_webhook <github_webhook_module>` and :ref:`github_webhook_facts <github_webhook_facts_module>` instead.
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* ``digital_ocean`` use :ref:`digital_ocean_droplet <digital_ocean_droplet_module>` instead.
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* ``gce`` use :ref:`gcp_compute_instance <gcp_compute_instance_module>` instead.
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* ``gcspanner`` use :ref:`gcp_spanner_instance <gcp_spanner_instance_module>` and :ref:`gcp_spanner_database <gcp_spanner_database_module>` instead.
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* ``gcdns_record`` use :ref:`gcp_dns_resource_record_set <gcp_dns_resource_record_set_module>` instead.
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* ``gcdns_zone`` use :ref:`gcp_dns_managed_zone <gcp_dns_managed_zone_module>` instead.
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* ``gcp_forwarding_rule`` use :ref:`gcp_compute_global_forwarding_rule <gcp_compute_global_forwarding_rule_module>` or :ref:`gcp_compute_forwarding_rule <gcp_compute_forwarding_rule_module>` instead.
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* ``gcp_healthcheck`` use :ref:`gcp_compute_health_check <gcp_compute_health_check_module>`, :ref:`gcp_compute_http_health_check <gcp_compute_http_health_check_module>`, or :ref:`gcp_compute_https_health_check <gcp_compute_https_health_check_module>` instead.
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* ``gcp_backend_service`` use :ref:`gcp_compute_backend_service <gcp_compute_backend_service_module>` instead.
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* ``gcp_target_proxy`` use :ref:`gcp_compute_target_http_proxy <gcp_compute_target_http_proxy_module>` instead.
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* ``gcp_url_map`` use :ref:`gcp_compute_url_map <gcp_compute_url_map_module>` instead.
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* ``panos`` use the `Palo Alto Networks Ansible Galaxy role <https://galaxy.ansible.com/PaloAltoNetworks/paloaltonetworks>`_ instead.
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Noteworthy module changes
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-------------------------
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* The ``foreman`` and ``katello`` modules have been deprecated in favor of a set of modules that are broken out per entity with better idempotency in mind.
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* The ``foreman`` and ``katello`` modules replacement is officially part of the Foreman Community and supported there.
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* The ``tower_credential`` module originally required the ``ssh_key_data`` to be the path to a ssh_key_file.
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In order to work like Tower/AWX, ``ssh_key_data`` now contains the content of the file.
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The previous behavior can be achieved with ``lookup('file', '/path/to/file')``.
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* The ``win_scheduled_task`` module deprecated support for specifying a trigger repetition as a list and this format
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will be removed in Ansible 2.12. Instead specify the repetition as a dictionary value.
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* The ``win_feature`` module has removed the deprecated ``restart_needed`` return value, use the standardized
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``reboot_required`` value instead.
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* The ``win_package`` module has removed the deprecated ``restart_required`` and ``exit_code`` return value, use the
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standardized ``reboot_required`` and ``rc`` value instead.
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* The ``win_get_url`` module has removed the deprecated ``win_get_url`` return dictionary, contained values are
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returned directly.
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* The ``win_get_url`` module has removed the deprecated ``skip_certificate_validation`` option, use the standardized
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``validate_certs`` option instead.
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* The ``vmware_local_role_facts`` module now returns a list of dicts instead of a dict of dicts for role information.
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* If ``docker_network`` or ``docker_volume`` were called with ``diff: yes``, ``check_mode: yes`` or ``debug: yes``,
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a return value called ``diff`` was returned of type ``list``. To enable proper diff output, this was changed to
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type ``dict``; the original ``list`` is returned as ``diff.differences``.
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* The ``na_ontap_cluster_peer`` module has replaced ``source_intercluster_lif`` and ``dest_intercluster_lif`` string options with
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``source_intercluster_lifs`` and ``dest_intercluster_lifs`` list options
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* The ``modprobe`` module now detects kernel builtins. Previously, attempting to remove (with ``state: absent``)
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a builtin kernel module succeeded without any error message because ``modprobe`` did not detect the module as
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``present``. Now, ``modprobe`` will fail if a kernel module is builtin and ``state: absent`` (with an error message
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from the modprobe binary like ``modprobe: ERROR: Module nfs is builtin.``), and it will succeed without reporting
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changed if ``state: present``. Any playbooks that are using ``changed_when: no`` to mask this quirk can safely
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remove that workaround. To get the previous behavior when applying ``state: absent`` to a builtin kernel module,
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use ``failed_when: false`` or ``ignore_errors: true`` in your playbook.
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* The ``digital_ocean`` module has been deprecated in favor of modules that do not require external dependencies.
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This allows for more flexibility and better module support.
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* The ``docker_container`` module has deprecated the returned fact ``docker_container``. The same value is
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available as the returned variable ``container``. The returned fact will be removed in Ansible 2.12.
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* The ``docker_network`` module has deprecated the returned fact ``docker_container``. The same value is
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available as the returned variable ``network``. The returned fact will be removed in Ansible 2.12.
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* The ``docker_volume`` module has deprecated the returned fact ``docker_container``. The same value is
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available as the returned variable ``volume``. The returned fact will be removed in Ansible 2.12.
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* The ``docker_service`` module was renamed to :ref:`docker_compose <docker_compose_module>`.
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* The renamed ``docker_compose`` module used to return one fact per service, named same as the service. A dictionary
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of these facts is returned as the regular return value ``services``. The returned facts will be removed in
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Ansible 2.12.
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* The ``docker_swarm_service`` module no longer sets a defaults for the following options:
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* ``user``. Before, the default was ``root``.
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* ``update_delay``. Before, the default was ``10``.
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* ``update_parallelism``. Before, the default was ``1``.
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* ``vmware_vm_facts`` used to return dict of dict with virtual machine's facts. Ansible 2.8 and onwards will return list of dict with virtual machine's facts.
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Please see module ``vmware_vm_facts`` documentation for example.
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* ``vmware_guest_snapshot`` module used to return ``results``. Since Ansible 2.8 and onwards ``results`` is a reserved keyword, it is replaced by ``snapshot_results``.
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Please see module ``vmware_guest_snapshots`` documentation for example.
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* The ``panos`` modules have been deprecated in favor of using the Palo Alto Networks `Ansible Galaxy role
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<https://galaxy.ansible.com/PaloAltoNetworks/paloaltonetworks>`_. Contributions to the role can be made
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`here <https://github.com/PaloAltoNetworks/ansible-pan>`_.
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* The ``ipa_user`` module originally always sent ``password`` to FreeIPA regardless of whether the password changed. Now the module only sends ``password`` if ``update_password`` is set to ``always``, which is the default.
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* The ``win_psexec`` has deprecated the undocumented ``extra_opts`` module option. This will be removed in Ansible 2.10.
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* The ``win_nssm`` module has deprecated the following options in favor of using the ``win_service`` module to configure the service after installing it with ``win_nssm``:
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* ``dependencies``, use ``dependencies`` of ``win_service`` instead
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* ``start_mode``, use ``start_mode`` of ``win_service`` instead
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* ``user``, use ``username`` of ``win_service`` instead
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* ``password``, use ``password`` of ``win_service`` instead
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These options will be removed in Ansible 2.12.
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* The ``win_nssm`` module has also deprecated the ``start``, ``stop``, and ``restart`` values of the ``status`` option.
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You should use the ``win_service`` module to control the running state of the service. This will be removed in Ansible 2.12.
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* The ``status`` module option for ``win_nssm`` has changed its default value to ``present``. Before, the default was ``start``.
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Consequently, the service is no longer started by default after creation with ``win_nssm``, and you should use
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the ``win_service`` module to start it if needed.
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* The ``app_parameters`` module option for ``win_nssm`` has been deprecated; use ``argument`` instead. This will be removed in Ansible 2.12.
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* The ``app_parameters_free_form`` module option for ``win_nssm`` has been aliased to the new ``arguments`` option.
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* The ``win_dsc`` module will now validate the input options for a DSC resource. In previous versions invalid options
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would be ignored but are now not.
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* The ``openssl_pkcs12`` module will now regenerate the pkcs12 file if there are differences between the file on disk and the parameters passed to the module.
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Plugins
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=======
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* Ansible no longer defaults to the ``paramiko`` connection plugin when using macOS as the control node. Ansible will now use the ``ssh`` connection plugin by default on a macOS control node. Since ``ssh`` supports connection persistence between tasks and playbook runs, it performs better than ``paramiko``. If you are using password authentication, you will need to install ``sshpass`` when using the ``ssh`` connection plugin. Or you can explicitly set the connection type to ``paramiko`` to maintain the pre-2.8 behavior on macOS.
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* Connection plugins have been standardized to allow use of ``ansible_<conn-type>_user``
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and ``ansible_<conn-type>_password`` variables. Variables such as
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``ansible_<conn-type>_pass`` and ``ansible_<conn-type>_username`` are treated
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with lower priority than the standardized names and may be deprecated in the
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future. In general, the ``ansible_user`` and ``ansible_password`` vars should
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be used unless there is a reason to use the connection-specific variables.
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* The ``powershell`` shell plugin now uses ``async_dir`` to define the async path for the results file and the default
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has changed to ``%USERPROFILE%\.ansible_async``. To control this path now, either set the ``ansible_async_dir``
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variable or the ``async_dir`` value in the ``powershell`` section of the config ini.
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* Order of enabled inventory plugins (:ref:`INVENTORY_ENABLED`) has been updated, :ref:`auto <auto_inventory>` is now before :ref:`yaml <yaml_inventory>` and :ref:`ini <ini_inventory>`.
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* The private ``_options`` attribute has been removed from the ``CallbackBase`` class of callback
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plugins. If you have a third-party callback plugin which needs to access the command line arguments,
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use code like the following instead of trying to use ``self._options``:
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.. code-block:: python
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|
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from ansible import context
|
|
[...]
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|
tags = context.CLIARGS['tags']
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|
|
|
``context.CLIARGS`` is a read-only dictionary so normal dictionary retrieval methods like
|
|
``CLIARGS.get('tags')`` and ``CLIARGS['tags']`` work as expected but you won't be able to modify
|
|
the cli arguments at all.
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|
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* Play recap now counts ``ignored`` and ``rescued`` tasks as well as ``ok``, ``changed``, ``unreachable``, ``failed`` and ``skipped`` tasks, thanks to two additional stat counters in the ``default`` callback plugin. Tasks that fail and have ``ignore_errors: yes`` set are listed as ``ignored``. Tasks that fail and then execute a rescue section are listed as ``rescued``. Note that ``rescued`` tasks are no longer counted as ``failed`` as in Ansible 2.7 (and earlier).
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|
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* ``osx_say`` callback plugin was renamed into :ref:`say <say_callback>`.
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* Inventory plugins now support caching via cache plugins. To start using a cache plugin with your inventory see the section on caching in the :ref:`inventory guide<using_inventory>`. To port a custom cache plugin to be compatible with inventory see :ref:`developer guide on cache plugins<developing_cache_plugins>`.
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Porting custom scripts
|
|
======================
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|
|
|
Display class
|
|
-------------
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|
|
|
As of Ansible 2.8, the ``Display`` class is now a "singleton". Instead of using ``__main__.display`` each file should
|
|
import and instantiate ``ansible.utils.display.Display`` on its own.
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|
|
|
**OLD** In Ansible 2.7 (and earlier) the following was used to access the ``display`` object:
|
|
|
|
.. code-block:: python
|
|
|
|
try:
|
|
from __main__ import display
|
|
except ImportError:
|
|
from ansible.utils.display import Display
|
|
display = Display()
|
|
|
|
**NEW** In Ansible 2.8 the following should be used:
|
|
|
|
.. code-block:: python
|
|
|
|
from ansible.utils.display import Display
|
|
display = Display()
|
|
|
|
Networking
|
|
==========
|
|
|
|
* The ``eos_config``, ``ios_config``, and ``nxos_config`` modules have removed the deprecated
|
|
``save`` and ``force`` parameters, use the ``save_when`` parameter to replicate their
|
|
functionality.
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|
|
|
* The ``nxos_vrf_af`` module has removed the ``safi`` parameter. This parameter was deprecated
|
|
in Ansible 2.4 and has had no impact on the module since then.
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