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Skip python interpreter discovery for 'forced local' module execution (#74824)

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mostly for use with network_os
  use 'remote is local' property as indicator
  ensure task_vars are as expected in test
pull/75430/head
Brian Coca 3 years ago committed by GitHub
parent 1d2af0b89e
commit 8d41b97329
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 54 additions and 35 deletions
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2
changelogs/fragments/skip_local_discovery.yml
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@ -0,0 +1,2 @@
bugfixes:
- do not trigger interpreter discovery in the forced_local module path as they should use the ansible playbook python unless otherwise configured.

65
lib/ansible/executor/module_common.py
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@ -587,7 +587,7 @@ def _slurp(path):
return data
def _get_shebang(interpreter, task_vars, templar, args=tuple()):
def _get_shebang(interpreter, task_vars, templar, args=tuple(), remote_is_local=False):
"""
Note not stellar API:
Returns None instead of always returning a shebang line. Doing it this
@ -595,42 +595,57 @@ def _get_shebang(interpreter, task_vars, templar, args=tuple()):
file rather than trust that we reformatted what they already have
correctly.
"""
interpreter_name = os.path.basename(interpreter).strip()
# FUTURE: add logical equivalence for python3 in the case of py3-only modules
# check for first-class interpreter config
interpreter_name = os.path.basename(interpreter).strip()
# name for interpreter var
interpreter_config = u'ansible_%s_interpreter' % interpreter_name
# key for config
interpreter_config_key = "INTERPRETER_%s" % interpreter_name.upper()
if C.config.get_configuration_definitions().get(interpreter_config_key):
interpreter_out = None
# looking for python, rest rely on matching vars
if interpreter_name == 'python':
# skip detection for network os execution, use playbook supplied one if possible
if remote_is_local:
interpreter_out = task_vars['ansible_playbook_python']
# a config def exists for this interpreter type; consult config for the value
interpreter_out = C.config.get_config_value(interpreter_config_key, variables=task_vars)
discovered_interpreter_config = u'discovered_interpreter_%s' % interpreter_name
elif C.config.get_configuration_definition(interpreter_config_key):
interpreter_out = templar.template(interpreter_out.strip())
interpreter_from_config = C.config.get_config_value(interpreter_config_key, variables=task_vars)
interpreter_out = templar.template(interpreter_from_config.strip())
# handle interpreter discovery if requested or empty interpreter was provided
if not interpreter_out or interpreter_out in ['auto', 'auto_legacy', 'auto_silent', 'auto_legacy_silent']:
discovered_interpreter_config = u'discovered_interpreter_%s' % interpreter_name
facts_from_task_vars = task_vars.get('ansible_facts', {})
# handle interpreter discovery if requested
if interpreter_out in ['auto', 'auto_legacy', 'auto_silent', 'auto_legacy_silent']:
if discovered_interpreter_config not in facts_from_task_vars:
# interpreter discovery is desired, but has not been run for this host
raise InterpreterDiscoveryRequiredError("interpreter discovery needed",
interpreter_name=interpreter_name,
discovery_mode=interpreter_out)
raise InterpreterDiscoveryRequiredError("interpreter discovery needed", interpreter_name=interpreter_name, discovery_mode=interpreter_out)
else:
interpreter_out = facts_from_task_vars[discovered_interpreter_config]
else:
# a config def does not exist for this interpreter type; consult vars for a possible direct override
interpreter_config = u'ansible_%s_interpreter' % interpreter_name
if interpreter_config not in task_vars:
return None, interpreter
raise InterpreterDiscoveryRequiredError("interpreter discovery required", interpreter_name=interpreter_name, discovery_mode='auto_legacy')
interpreter_out = templar.template(task_vars[interpreter_config].strip())
elif interpreter_config in task_vars:
# for non python we consult vars for a possible direct override
interpreter_out = templar.template(task_vars.get(interpreter_config).strip())
if not interpreter_out:
# nothing matched(None) or in case someone configures empty string or empty intepreter
interpreter_out = interpreter
shebang = None
elif interpreter_out == interpreter:
# no change, no new shebang
shebang = None
else:
# set shebang cause we changed interpreter
shebang = u'#!' + interpreter_out
if args:
shebang = shebang + u' ' + u' '.join(args)
@ -1067,7 +1082,7 @@ def _add_module_to_zip(zf, remote_module_fqn, b_module_data):
def _find_module_utils(module_name, b_module_data, module_path, module_args, task_vars, templar, module_compression, async_timeout, become,
become_method, become_user, become_password, become_flags, environment):
become_method, become_user, become_password, become_flags, environment, remote_is_local=False):
"""
Given the source of the module, convert it to a Jinja2 template to insert
module code and return whether it's a new or old style module.
@ -1221,7 +1236,7 @@ def _find_module_utils(module_name, b_module_data, module_path, module_args, tas
'Look at traceback for that process for debugging information.')
zipdata = to_text(zipdata, errors='surrogate_or_strict')
shebang, interpreter = _get_shebang(u'/usr/bin/python', task_vars, templar)
shebang, interpreter = _get_shebang(u'/usr/bin/python', task_vars, templar, remote_is_local=remote_is_local)
if shebang is None:
shebang = u'#!/usr/bin/python'
@ -1313,7 +1328,7 @@ def _find_module_utils(module_name, b_module_data, module_path, module_args, tas
def modify_module(module_name, module_path, module_args, templar, task_vars=None, module_compression='ZIP_STORED', async_timeout=0, become=False,
become_method=None, become_user=None, become_password=None, become_flags=None, environment=None):
become_method=None, become_user=None, become_password=None, become_flags=None, environment=None, remote_is_local=False):
"""
Used to insert chunks of code into modules before transfer rather than
doing regular python imports. This allows for more efficient transfer in
@ -1345,7 +1360,7 @@ def modify_module(module_name, module_path, module_args, templar, task_vars=None
(b_module_data, module_style, shebang) = _find_module_utils(module_name, b_module_data, module_path, module_args, task_vars, templar, module_compression,
async_timeout=async_timeout, become=become, become_method=become_method,
become_user=become_user, become_password=become_password, become_flags=become_flags,
environment=environment)
environment=environment, remote_is_local=remote_is_local)
if module_style == 'binary':
return (b_module_data, module_style, to_text(shebang, nonstring='passthru'))
@ -1359,7 +1374,7 @@ def modify_module(module_name, module_path, module_args, templar, task_vars=None
# _get_shebang() takes text strings
args = [to_text(a, errors='surrogate_or_strict') for a in args]
interpreter = args[0]
b_new_shebang = to_bytes(_get_shebang(interpreter, task_vars, templar, args[1:])[0],
b_new_shebang = to_bytes(_get_shebang(interpreter, task_vars, templar, args[1:], remote_is_local=remote_is_local)[0],
errors='surrogate_or_strict', nonstring='passthru')
if b_new_shebang:

1
lib/ansible/plugins/action/__init__.py
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@ -234,6 +234,7 @@ class ActionBase(with_metaclass(ABCMeta, object)):
module_compression=self._play_context.module_compression,
async_timeout=self._task.async_val,
environment=final_environment,
remote_is_local=bool(getattr(self._connection, '_remote_is_local', False)),
**become_kwargs)
break
except InterpreterDiscoveryRequiredError as idre:

3
test/units/plugins/action/test_action.py
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@ -159,7 +159,8 @@ class TestActionBase(unittest.TestCase):
mock_task.args = dict(a=1, foo='fö〩')
mock_connection.module_implementation_preferences = ('',)
(style, shebang, data, path) = action_base._configure_module(mock_task.action, mock_task.args,
task_vars=dict(ansible_python_interpreter='/usr/bin/python'))
task_vars=dict(ansible_python_interpreter='/usr/bin/python',
ansible_playbook_python='/usr/bin/python'))
self.assertEqual(style, "new")
self.assertEqual(shebang, u"#!/usr/bin/python")

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