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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: (c) 2012, Derek Carter<goozbach@friocorte.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
ANSIBLE_METADATA = {
'metadata_version': '1.1',
'status': ['stableinterface'],
'supported_by': 'core'
}
DOCUMENTATION = r'''
---
module: selinux
short_description: Change policy and state of SELinux
description:
- Configures the SELinux mode and policy.
- A reboot may be required after usage.
- Ansible will not issue this reboot but will let you know when it is required.
version_added: "0.7"
options:
policy:
description:
- The name of the SELinux policy to use (e.g. C(targeted)) will be required if state is not C(disabled).
state:
description:
- The SELinux mode.
required: true
choices: [ disabled, enforcing, permissive ]
configfile:
description:
- The path to the SELinux configuration file, if non-standard.
default: /etc/selinux/config
aliases: [ conf, file ]
requirements: [ libselinux-python ]
author:
- Derek Carter (@goozbach) <goozbach@friocorte.com>
'''
EXAMPLES = r'''
- name: Enable SELinux
selinux:
policy: targeted
state: enforcing
- name: Put SELinux in permissive mode, logging actions that would be blocked.
selinux:
policy: targeted
state: permissive
- name: Disable SELinux
selinux:
state: disabled
'''
RETURN = r'''
msg:
description: Messages that describe changes that were made.
returned: always
type: str
sample: Config SELinux state changed from 'disabled' to 'permissive'
configfile:
description: Path to SELinux configuration file.
returned: always
type: str
sample: /etc/selinux/config
policy:
description: Name of the SELinux policy.
returned: always
type: str
sample: targeted
state:
description: SELinux mode.
returned: always
type: str
sample: enforcing
reboot_required:
description: Whether or not an reboot is required for the changes to take effect.
returned: always
type: bool
sample: true
'''
import os
import re
import tempfile
import traceback
SELINUX_IMP_ERR = None
try:
import selinux
HAS_SELINUX = True
except ImportError:
SELINUX_IMP_ERR = traceback.format_exc()
HAS_SELINUX = False
from ansible.module_utils.basic import AnsibleModule, missing_required_lib
from ansible.module_utils.facts.utils import get_file_lines
# getter subroutines
def get_config_state(configfile):
lines = get_file_lines(configfile, strip=False)
for line in lines:
stateline = re.match(r'^SELINUX=.*$', line)
if stateline:
return line.split('=')[1].strip()
def get_config_policy(configfile):
lines = get_file_lines(configfile, strip=False)
for line in lines:
stateline = re.match(r'^SELINUXTYPE=.*$', line)
if stateline:
return line.split('=')[1].strip()
# setter subroutines
def set_config_state(module, state, configfile):
# SELINUX=permissive
# edit config file with state value
stateline = 'SELINUX=%s' % state
lines = get_file_lines(configfile, strip=False)
tmpfd, tmpfile = tempfile.mkstemp()
with open(tmpfile, "w") as write_file:
for line in lines:
write_file.write(re.sub(r'^SELINUX=.*', stateline, line) + '\n')
module.atomic_move(tmpfile, configfile)
def set_state(module, state):
if state == 'enforcing':
selinux.security_setenforce(1)
elif state == 'permissive':
selinux.security_setenforce(0)
elif state == 'disabled':
pass
else:
msg = 'trying to set invalid runtime state %s' % state
module.fail_json(msg=msg)
def set_config_policy(module, policy, configfile):
if not os.path.exists('/etc/selinux/%s/policy' % policy):
module.fail_json(msg='Policy %s does not exist in /etc/selinux/' % policy)
# edit config file with state value
# SELINUXTYPE=targeted
policyline = 'SELINUXTYPE=%s' % policy
lines = get_file_lines(configfile, strip=False)
tmpfd, tmpfile = tempfile.mkstemp()
with open(tmpfile, "w") as write_file:
for line in lines:
write_file.write(re.sub(r'^SELINUXTYPE=.*', policyline, line) + '\n')
module.atomic_move(tmpfile, configfile)
def main():
module = AnsibleModule(
argument_spec=dict(
policy=dict(type='str'),
state=dict(type='str', required='True', choices=['enforcing', 'permissive', 'disabled']),
configfile=dict(type='str', default='/etc/selinux/config', aliases=['conf', 'file']),
),
supports_check_mode=True,
)
if not HAS_SELINUX:
module.fail_json(msg=missing_required_lib('libselinux-python'), exception=SELINUX_IMP_ERR)
# global vars
changed = False
msgs = []
configfile = module.params['configfile']
policy = module.params['policy']
state = module.params['state']
runtime_enabled = selinux.is_selinux_enabled()
runtime_policy = selinux.selinux_getpolicytype()[1]
runtime_state = 'disabled'
reboot_required = False
if runtime_enabled:
# enabled means 'enforcing' or 'permissive'
if selinux.security_getenforce():
runtime_state = 'enforcing'
else:
runtime_state = 'permissive'
if not os.path.isfile(configfile):
module.fail_json(msg="Unable to find file {0}".format(configfile),
details="Please install SELinux-policy package, "
"if this package is not installed previously.")
config_policy = get_config_policy(configfile)
config_state = get_config_state(configfile)
# check to see if policy is set if state is not 'disabled'
if state != 'disabled':
if not policy:
module.fail_json(msg="Policy is required if state is not 'disabled'")
else:
if not policy:
policy = config_policy
# check changed values and run changes
if policy != runtime_policy:
if module.check_mode:
module.exit_json(changed=True)
# cannot change runtime policy
msgs.append("Running SELinux policy changed from '%s' to '%s'" % (runtime_policy, policy))
changed = True
if policy != config_policy:
if module.check_mode:
module.exit_json(changed=True)
set_config_policy(module, policy, configfile)
msgs.append("SELinux policy configuration in '%s' changed from '%s' to '%s'" % (configfile, config_policy, policy))
changed = True
if state != runtime_state:
if runtime_enabled:
if state == 'disabled':
if runtime_state != 'permissive':
# Temporarily set state to permissive
if not module.check_mode:
set_state(module, 'permissive')
module.warn("SELinux state temporarily changed from '%s' to 'permissive'. State change will take effect next reboot." % (runtime_state))
changed = True
else:
module.warn('SELinux state change will take effect next reboot')
reboot_required = True
else:
if not module.check_mode:
set_state(module, state)
msgs.append("SELinux state changed from '%s' to '%s'" % (runtime_state, state))
# Only report changes if the file is changed.
# This prevents the task from reporting changes every time the task is run.
changed = True
else:
module.warn("Reboot is required to set SELinux state to '%s'" % state)
reboot_required = True
if state != config_state:
if not module.check_mode:
set_config_state(module, state, configfile)
msgs.append("Config SELinux state changed from '%s' to '%s'" % (config_state, state))
changed = True
module.exit_json(changed=changed, msg=', '.join(msgs), configfile=configfile, policy=policy, state=state, reboot_required=reboot_required)
if __name__ == '__main__':
main()
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