52 lines
2.5 KiB
ReStructuredText
52 lines
2.5 KiB
ReStructuredText
|
.. _interpreter_discovery:
|
||
|
|
|
||
|
|
Interpreter Discovery
|
||
|
|
=====================
|
||
|
|
|
||
|
|
Most Ansible modules that execute under a POSIX environment require a Python
|
||
|
|
interpreter on the target host. Unless configured otherwise, Ansible will
|
||
|
|
attempt to discover a suitable Python interpreter on each target host
|
||
|
|
the first time a Python module is executed for that host.
|
||
|
|
|
||
|
|
To control the discovery behavior:
|
||
|
|
|
||
|
|
* for individual hosts and groups, use the ``ansible_python_interpreter`` inventory variable
|
||
|
|
* globally, use the ``interpreter_python`` key in the ``[defaults]`` section of ``ansible.cfg``
|
||
|
|
|
||
|
|
Use one of the following values:
|
||
|
|
|
||
|
|
auto_legacy : (default in 2.8)
|
||
|
|
Detects the target OS platform, distribution, and version, then consults a
|
||
|
|
table listing the correct Python interpreter and path for each
|
||
|
|
platform/distribution/version. If an entry is found, and ``/usr/bin/python`` is absent, uses the discovered interpreter (and path). If an entry
|
||
|
|
is found, and ``/usr/bin/python`` is present, uses ``/usr/bin/python``
|
||
|
|
and issues a warning.
|
||
|
|
This exception provides temporary compatibility with previous versions of
|
||
|
|
Ansible that always defaulted to ``/usr/bin/python``, so if you have
|
||
|
|
installed Python and other dependencies at ``usr/bin/python`` on some hosts,
|
||
|
|
Ansible will find and use them with this setting.
|
||
|
|
If no entry is found, or the listed Python is not present on the
|
||
|
|
target host, searches a list of common Python interpreter
|
||
|
|
paths and uses the first one found; also issues a warning that future
|
||
|
|
installation of another Python interpreter could alter the one chosen.
|
||
|
|
|
||
|
|
auto : (future default in 2.12)
|
||
|
|
Detects the target OS platform, distribution, and version, then consults a
|
||
|
|
table listing the correct Python interpreter and path for each
|
||
|
|
platform/distribution/version. If an entry is found, uses the discovered
|
||
|
|
interpreter.
|
||
|
|
If no entry is found, or the listed Python is not present on the
|
||
|
|
target host, searches a list of common Python interpreter
|
||
|
|
paths and uses the first one found; also issues a warning that future
|
||
|
|
installation of another Python interpreter could alter the one chosen.
|
||
|
|
|
||
|
|
auto_legacy_silent
|
||
|
|
Same as ``auto_legacy``, but does not issue warnings.
|
||
|
|
|
||
|
|
auto_silent
|
||
|
|
Same as ``auto``, but does not issue warnings.
|
||
|
|
|
||
|
|
You can still set ``ansible_python_interpreter`` to a specific path at any
|
||
|
|
variable level (for example, in host_vars, in vars files, in playbooks, etc.).
|
||
|
|
Setting a specific path completely disables automatic interpreter discovery; Ansible always uses the path specified.
|