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Ported over #7158 to support SELinux context switches.

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This commit is contained in:
Florian Apolloner 2015-09-17 14:59:22 +02:00
parent 8548690ca3
commit d9f873495e
4 changed files with 28 additions and 1 deletions
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12
docsite/rst/intro_configuration.rst
View file

@ -678,6 +678,18 @@ Ask for privilege escalation password, the default is False::
become_ask_pass=True
.. _become_allow_same_user:
become_allow_same_user
======================
Most of the time, using *sudo* to run a command as the same user who is running
*sudo* itself is unnecessary overhead, so Ansible does not allow it. However,
depending on the *sudo* configuration, it may be necessary to run a command as
the same user through *sudo*, such as to switch SELinux contexts. For this
reason, you can set ``become_allow_same_user`` to ``True`` and disable this
optimization.
.. _paramiko_settings:
Paramiko Specific Settings

1
lib/ansible/constants.py
View file

@ -173,6 +173,7 @@ DEFAULT_ASK_SUDO_PASS = get_config(p, DEFAULTS, 'ask_sudo_pass', 'ANSIBLE
# Become
BECOME_ERROR_STRINGS = {'sudo': 'Sorry, try again.', 'su': 'Authentication failure', 'pbrun': '', 'pfexec': '', 'runas': '', 'doas': 'Permission denied'} #FIXME: deal with i18n
BECOME_METHODS = ['sudo','su','pbrun','pfexec','runas','doas']
BECOME_ALLOW_SAME_USER = get_config(p, 'privilege_escalation', 'become_allow_same_user', 'ANSIBLE_BECOME_ALLOW_SAME_USER', False, boolean=True)
DEFAULT_BECOME_METHOD = get_config(p, 'privilege_escalation', 'become_method', 'ANSIBLE_BECOME_METHOD','sudo' if DEFAULT_SUDO else 'su' if DEFAULT_SU else 'sudo' ).lower()
DEFAULT_BECOME = get_config(p, 'privilege_escalation', 'become', 'ANSIBLE_BECOME',False, boolean=True)
DEFAULT_BECOME_USER = get_config(p, 'privilege_escalation', 'become_user', 'ANSIBLE_BECOME_USER', 'root')

4
lib/ansible/plugins/action/__init__.py
View file

@ -453,7 +453,9 @@ class ActionBase:
self._display.debug("no command, exiting _low_level_execute_command()")
return dict(stdout='', stderr='')
if sudoable and self._play_context.become and self._play_context.become_user != self._play_context.remote_user:
allow_same_user = C.BECOME_ALLOW_SAME_USER
same_user = self._play_context.become_user == self._play_context.remote_user
if sudoable and self._play_context.become and (allow_same_user or not same_user):
self._display.debug("using become for this command")
cmd = self._play_context.make_become_cmd(cmd, executable=executable)

12
test/units/plugins/action/test_action.py
View file

@ -20,6 +20,7 @@ from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from ansible import constants as C
from ansible.compat.tests import unittest
from ansible.compat.tests.mock import Mock
from ansible.playbook.play_context import PlayContext
@ -43,3 +44,14 @@ class TestActionBase(unittest.TestCase):
play_context.remote_user = 'apo'
action_base._low_level_execute_command('ECHO', '/tmp', sudoable=True)
play_context.make_become_cmd.assert_called_once_with('ECHO', executable=None)
play_context.make_become_cmd.reset_mock()
become_allow_same_user = C.BECOME_ALLOW_SAME_USER
C.BECOME_ALLOW_SAME_USER = True
try:
play_context.remote_user = 'root'
action_base._low_level_execute_command('ECHO SAME', '/tmp', sudoable=True)
play_context.make_become_cmd.assert_called_once_with('ECHO SAME', executable=None)
finally:
C.BECOME_ALLOW_SAME_USER = become_allow_same_user