#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: (c) 2013, Hiroaki Nakamura <hnakamur@gmail.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
DOCUMENTATION = '''
---
module: hostname
author:
- Adrian Likins (@alikins)
- Hideki Saito (@saito-hideki)
version_added: "1.4"
short_description: Manage hostname
requirements: [ hostname ]
description:
- Set system's hostname. Supports most OSs/Distributions including those using C(systemd).
- Windows, HP-UX, and AIX are not currently supported.
notes:
- This module does B(NOT) modify C(/etc/hosts). You need to modify it yourself using other modules such as M(ansible.builtin.template)
or M(ansible.builtin.replace).
- On macOS, this module uses C(scutil) to set C(HostName), C(ComputerName), and C(LocalHostName). Since C(LocalHostName)
cannot contain spaces or most special characters, this module will replace characters when setting C(LocalHostName).
options:
name:
description:
- Name of the host.
- If the value is a fully qualified domain name that does not resolve from the given host,
this will cause the module to hang for a few seconds while waiting for the name resolution attempt to timeout.
type: str
required: true
use:
description:
- Which strategy to use to update the hostname.
- If not set we try to autodetect, but this can be problematic, particularly with containers as they can present misleading information.
- Note that 'systemd' should be specified for RHEL/EL/CentOS 7+. Older distributions should use 'redhat'.
choices: ['alpine', 'debian', 'freebsd', 'generic', 'macos', 'macosx', 'darwin', 'openbsd', 'openrc', 'redhat', 'sles', 'solaris', 'systemd']
type: str
version_added: '2.9'
extends_documentation_fragment:
- action_common_attributes
- action_common_attributes.facts
attributes:
check_mode:
support: full
diff_mode:
support: full
facts:
support: full
platform:
platforms: posix
'''
EXAMPLES = '''
- name: Set a hostname
ansible.builtin.hostname:
name: web01
- name: Set a hostname specifying strategy
ansible.builtin.hostname:
name: web01
use: systemd
'''
import os
import platform
import socket
import traceback
import ansible.module_utils.compat.typing as t
from ansible.module_utils.basic import (
AnsibleModule,
get_distribution,
get_distribution_version,
)
from ansible.module_utils.common.sys_info import get_platform_subclass
from ansible.module_utils.facts.system.service_mgr import ServiceMgrFactCollector
from ansible.module_utils.facts.utils import get_file_lines, get_file_content
from ansible.module_utils._text import to_native, to_text
from ansible.module_utils.six import PY3, text_type
STRATS = {
'alpine': 'Alpine',
'debian': 'Systemd',
'freebsd': 'FreeBSD',
'generic': 'Base',
'macos': 'Darwin',
'macosx': 'Darwin',
'darwin': 'Darwin',
'openbsd': 'OpenBSD',
'openrc': 'OpenRC',
'redhat': 'RedHat',
'sles': 'SLES',
'solaris': 'Solaris',
'systemd': 'Systemd',
}
class BaseStrategy(object):
def __init__(self, module):
self.module = module
self.changed = False
def update_current_and_permanent_hostname(self):
self.update_current_hostname()
self.update_permanent_hostname()
return self.changed
def update_current_hostname(self):
name = self.module.params['name']
current_name = self.get_current_hostname()
if current_name != name:
if not self.module.check_mode:
self.set_current_hostname(name)
self.changed = True
def update_permanent_hostname(self):
name = self.module.params['name']
permanent_name = self.get_permanent_hostname()
if permanent_name != name:
if not self.module.check_mode:
self.set_permanent_hostname(name)
self.changed = True
def get_current_hostname(self):
return self.get_permanent_hostname()
def set_current_hostname(self, name):
pass
def get_permanent_hostname(self):
raise NotImplementedError
def set_permanent_hostname(self, name):
raise NotImplementedError
class UnimplementedStrategy(BaseStrategy):
def update_current_and_permanent_hostname(self):
self.unimplemented_error()
def update_current_hostname(self):
self.unimplemented_error()
def update_permanent_hostname(self):
self.unimplemented_error()
def get_current_hostname(self):
self.unimplemented_error()
def set_current_hostname(self, name):
self.unimplemented_error()
def get_permanent_hostname(self):
self.unimplemented_error()
def set_permanent_hostname(self, name):
self.unimplemented_error()
def unimplemented_error(self):
system = platform.system()
distribution = get_distribution()
if distribution is not None:
msg_platform = '%s (%s)' % (system, distribution)
else:
msg_platform = system
self.module.fail_json(
msg='hostname module cannot be used on platform %s' % msg_platform)
class CommandStrategy(BaseStrategy):
COMMAND = 'hostname'
def __init__(self, module):
super(CommandStrategy, self).__init__(module)
self.hostname_cmd = self.module.get_bin_path(self.COMMAND, True)
def get_current_hostname(self):
cmd = [self.hostname_cmd]
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
return to_native(out).strip()
def set_current_hostname(self, name):
cmd = [self.hostname_cmd, name]
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
def get_permanent_hostname(self):
return 'UNKNOWN'
def set_permanent_hostname(self, name):
pass
class FileStrategy(BaseStrategy):
FILE = '/etc/hostname'
def get_permanent_hostname(self):
if not os.path.isfile(self.FILE):
return ''
try:
return get_file_content(self.FILE, default='', strip=True)
except Exception as e:
self.module.fail_json(
msg="failed to read hostname: %s" % to_native(e),
exception=traceback.format_exc())
def set_permanent_hostname(self, name):
try:
with open(self.FILE, 'w+') as f:
f.write("%s\n" % name)
except Exception as e:
self.module.fail_json(
msg="failed to update hostname: %s" % to_native(e),
exception=traceback.format_exc())
class SLESStrategy(FileStrategy):
"""
This is a SLES Hostname strategy class - it edits the
/etc/HOSTNAME file.
"""
FILE = '/etc/HOSTNAME'
class RedHatStrategy(BaseStrategy):
"""
This is a Redhat Hostname strategy class - it edits the
/etc/sysconfig/network file.
"""
NETWORK_FILE = '/etc/sysconfig/network'
def get_permanent_hostname(self):
try:
for line in get_file_lines(self.NETWORK_FILE):
line = to_native(line).strip()
if line.startswith('HOSTNAME'):
k, v = line.split('=')
return v.strip()
self.module.fail_json(
"Unable to locate HOSTNAME entry in %s" % self.NETWORK_FILE
)
except Exception as e:
self.module.fail_json(
msg="failed to read hostname: %s" % to_native(e),
exception=traceback.format_exc())
def set_permanent_hostname(self, name):
try:
lines = []
found = False
content = get_file_content(self.NETWORK_FILE, strip=False) or ""
for line in content.splitlines(True):
line = to_native(line)
if line.strip().startswith('HOSTNAME'):
lines.append("HOSTNAME=%s\n" % name)
found = True
else:
lines.append(line)
if not found:
lines.append("HOSTNAME=%s\n" % name)
with open(self.NETWORK_FILE, 'w+') as f:
f.writelines(lines)
except Exception as e:
self.module.fail_json(
msg="failed to update hostname: %s" % to_native(e),
exception=traceback.format_exc())
class AlpineStrategy(FileStrategy):
"""
This is a Alpine Linux Hostname manipulation strategy class - it edits
the /etc/hostname file then run hostname -F /etc/hostname.
"""
FILE = '/etc/hostname'
COMMAND = 'hostname'
def set_current_hostname(self, name):
super(AlpineStrategy, self).set_current_hostname(name)
hostname_cmd = self.module.get_bin_path(self.COMMAND, True)
cmd = [hostname_cmd, '-F', self.FILE]
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
class SystemdStrategy(BaseStrategy):
"""
This is a Systemd hostname manipulation strategy class - it uses
the hostnamectl command.
"""
COMMAND = "hostnamectl"
def __init__(self, module):
super(SystemdStrategy, self).__init__(module)
self.hostnamectl_cmd = self.module.get_bin_path(self.COMMAND, True)
def get_current_hostname(self):
cmd = [self.hostnamectl_cmd, '--transient', 'status']
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
return to_native(out).strip()
def set_current_hostname(self, name):
if len(name) > 64:
self.module.fail_json(msg="name cannot be longer than 64 characters on systemd servers, try a shorter name")
cmd = [self.hostnamectl_cmd, '--transient', 'set-hostname', name]
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
def get_permanent_hostname(self):
cmd = [self.hostnamectl_cmd, '--static', 'status']
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
return to_native(out).strip()
def set_permanent_hostname(self, name):
if len(name) > 64:
self.module.fail_json(msg="name cannot be longer than 64 characters on systemd servers, try a shorter name")
cmd = [self.hostnamectl_cmd, '--pretty', '--static', 'set-hostname', name]
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
def update_current_and_permanent_hostname(self):
# Must set the permanent hostname prior to current to avoid NetworkManager complaints
# about setting the hostname outside of NetworkManager
self.update_permanent_hostname()
self.update_current_hostname()
return self.changed
class OpenRCStrategy(BaseStrategy):
"""
This is a Gentoo (OpenRC) Hostname manipulation strategy class - it edits
the /etc/conf.d/hostname file.
"""
FILE = '/etc/conf.d/hostname'
def get_permanent_hostname(self):
if not os.path.isfile(self.FILE):
return ''
try:
for line in get_file_lines(self.FILE):
line = line.strip()
if line.startswith('hostname='):
return line[10:].strip('"')
except Exception as e:
self.module.fail_json(
msg="failed to read hostname: %s" % to_native(e),
exception=traceback.format_exc())
def set_permanent_hostname(self, name):
try:
lines = [x.strip() for x in get_file_lines(self.FILE)]
for i, line in enumerate(lines):
if line.startswith('hostname='):
lines[i] = 'hostname="%s"' % name
break
with open(self.FILE, 'w') as f:
f.write('\n'.join(lines) + '\n')
except Exception as e:
self.module.fail_json(
msg="failed to update hostname: %s" % to_native(e),
exception=traceback.format_exc())
class OpenBSDStrategy(FileStrategy):
"""
This is a OpenBSD family Hostname manipulation strategy class - it edits
the /etc/myname file.
"""
FILE = '/etc/myname'
class SolarisStrategy(BaseStrategy):
"""
This is a Solaris11 or later Hostname manipulation strategy class - it
execute hostname command.
"""
COMMAND = "hostname"
def __init__(self, module):
super(SolarisStrategy, self).__init__(module)
self.hostname_cmd = self.module.get_bin_path(self.COMMAND, True)
def set_current_hostname(self, name):
cmd_option = '-t'
cmd = [self.hostname_cmd, cmd_option, name]
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
def get_permanent_hostname(self):
fmri = 'svc:/system/identity:node'
pattern = 'config/nodename'
cmd = '/usr/sbin/svccfg -s %s listprop -o value %s' % (fmri, pattern)
rc, out, err = self.module.run_command(cmd, use_unsafe_shell=True)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
return to_native(out).strip()
def set_permanent_hostname(self, name):
cmd = [self.hostname_cmd, name]
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
class FreeBSDStrategy(BaseStrategy):
"""
This is a FreeBSD hostname manipulation strategy class - it edits
the /etc/rc.conf.d/hostname file.
"""
FILE = '/etc/rc.conf.d/hostname'
COMMAND = "hostname"
def __init__(self, module):
super(FreeBSDStrategy, self).__init__(module)
self.hostname_cmd = self.module.get_bin_path(self.COMMAND, True)
def get_current_hostname(self):
cmd = [self.hostname_cmd]
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
return to_native(out).strip()
def set_current_hostname(self, name):
cmd = [self.hostname_cmd, name]
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Command failed rc=%d, out=%s, err=%s" % (rc, out, err))
def get_permanent_hostname(self):
if not os.path.isfile(self.FILE):
return ''
try:
for line in get_file_lines(self.FILE):
line = line.strip()
if line.startswith('hostname='):
return line[10:].strip('"')
except Exception as e:
self.module.fail_json(
msg="failed to read hostname: %s" % to_native(e),
exception=traceback.format_exc())
def set_permanent_hostname(self, name):
try:
if os.path.isfile(self.FILE):
lines = [x.strip() for x in get_file_lines(self.FILE)]
for i, line in enumerate(lines):
if line.startswith('hostname='):
lines[i] = 'hostname="%s"' % name
break
else:
lines = ['hostname="%s"' % name]
with open(self.FILE, 'w') as f:
f.write('\n'.join(lines) + '\n')
except Exception as e:
self.module.fail_json(
msg="failed to update hostname: %s" % to_native(e),
exception=traceback.format_exc())
class DarwinStrategy(BaseStrategy):
"""
This is a macOS hostname manipulation strategy class. It uses
/usr/sbin/scutil to set ComputerName, HostName, and LocalHostName.
HostName corresponds to what most platforms consider to be hostname.
It controls the name used on the command line and SSH.
However, macOS also has LocalHostName and ComputerName settings.
LocalHostName controls the Bonjour/ZeroConf name, used by services
like AirDrop. This class implements a method, _scrub_hostname(), that mimics
the transformations macOS makes on hostnames when enterened in the Sharing
preference pane. It replaces spaces with dashes and removes all special
characters.
ComputerName is the name used for user-facing GUI services, like the
System Preferences/Sharing pane and when users connect to the Mac over the network.
"""
def __init__(self, module):
super(DarwinStrategy, self).__init__(module)
self.scutil = self.module.get_bin_path('scutil', True)
self.name_types = ('HostName', 'ComputerName', 'LocalHostName')
self.scrubbed_name = self._scrub_hostname(self.module.params['name'])
def _make_translation(self, replace_chars, replacement_chars, delete_chars):
if PY3:
return str.maketrans(replace_chars, replacement_chars, delete_chars)
if not isinstance(replace_chars, text_type) or not isinstance(replacement_chars, text_type):
raise ValueError('replace_chars and replacement_chars must both be strings')
if len(replace_chars) != len(replacement_chars):
raise ValueError('replacement_chars must be the same length as replace_chars')
table = dict(zip((ord(c) for c in replace_chars), replacement_chars))
for char in delete_chars:
table[ord(char)] = None
return table
def _scrub_hostname(self, name):
"""
LocalHostName only accepts valid DNS characters while HostName and ComputerName
accept a much wider range of characters. This function aims to mimic how macOS
translates a friendly name to the LocalHostName.
"""
# Replace all these characters with a single dash
name = to_text(name)
replace_chars = u'\'"~`!@#$%^&*(){}[]/=?+\\|-_ '
delete_chars = u".'"
table = self._make_translation(replace_chars, u'-' * len(replace_chars), delete_chars)
name = name.translate(table)
# Replace multiple dashes with a single dash
while '-' * 2 in name:
name = name.replace('-' * 2, '')
name = name.rstrip('-')
return name
def get_current_hostname(self):
cmd = [self.scutil, '--get', 'HostName']
rc, out, err = self.module.run_command(cmd)
if rc != 0 and 'HostName: not set' not in err:
self.module.fail_json(msg="Failed to get current hostname rc=%d, out=%s, err=%s" % (rc, out, err))
return to_native(out).strip()
def get_permanent_hostname(self):
cmd = [self.scutil, '--get', 'ComputerName']
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Failed to get permanent hostname rc=%d, out=%s, err=%s" % (rc, out, err))
return to_native(out).strip()
def set_permanent_hostname(self, name):
for hostname_type in self.name_types:
cmd = [self.scutil, '--set', hostname_type]
if hostname_type == 'LocalHostName':
cmd.append(to_native(self.scrubbed_name))
else:
cmd.append(to_native(name))
rc, out, err = self.module.run_command(cmd)
if rc != 0:
self.module.fail_json(msg="Failed to set {3} to '{2}': {0} {1}".format(to_native(out), to_native(err), to_native(name), hostname_type))
def set_current_hostname(self, name):
pass
def update_current_hostname(self):
pass
def update_permanent_hostname(self):
name = self.module.params['name']
# Get all the current host name values in the order of self.name_types
all_names = tuple(self.module.run_command([self.scutil, '--get', name_type])[1].strip() for name_type in self.name_types)
# Get the expected host name values based on the order in self.name_types
expected_names = tuple(self.scrubbed_name if n == 'LocalHostName' else name for n in self.name_types)
# Ensure all three names are updated
if all_names != expected_names:
if not self.module.check_mode:
self.set_permanent_hostname(name)
self.changed = True
class Hostname(object):
"""
This is a generic Hostname manipulation class that is subclassed
based on platform.
A subclass may wish to set different strategy instance to self.strategy.
All subclasses MUST define platform and distribution (which may be None).
"""
platform = 'Generic'
distribution = None # type: str | None
strategy_class = UnimplementedStrategy # type: t.Type[BaseStrategy]
def __new__(cls, *args, **kwargs):
new_cls = get_platform_subclass(Hostname)
return super(cls, new_cls).__new__(new_cls)
def __init__(self, module):
self.module = module
self.name = module.params['name']
self.use = module.params['use']
if self.use is not None:
strat = globals()['%sStrategy' % STRATS[self.use]]
self.strategy = strat(module)
elif platform.system() == 'Linux' and ServiceMgrFactCollector.is_systemd_managed(module):
# This is Linux and systemd is active
self.strategy = SystemdStrategy(module)
else:
self.strategy = self.strategy_class(module)
def update_current_and_permanent_hostname(self):
return self.strategy.update_current_and_permanent_hostname()
def get_current_hostname(self):
return self.strategy.get_current_hostname()
def set_current_hostname(self, name):
self.strategy.set_current_hostname(name)
def get_permanent_hostname(self):
return self.strategy.get_permanent_hostname()
def set_permanent_hostname(self, name):
self.strategy.set_permanent_hostname(name)
class SLESHostname(Hostname):
platform = 'Linux'
distribution = 'Sles'
try:
distribution_version = get_distribution_version()
# cast to float may raise ValueError on non SLES, we use float for a little more safety over int
if distribution_version and 10 <= float(distribution_version) <= 12:
strategy_class = SLESStrategy # type: t.Type[BaseStrategy]
else:
raise ValueError()
except ValueError:
strategy_class = UnimplementedStrategy
class RHELHostname(Hostname):
platform = 'Linux'
distribution = 'Redhat'
strategy_class = RedHatStrategy
class CentOSHostname(Hostname):
platform = 'Linux'
distribution = 'Centos'
strategy_class = RedHatStrategy
class AnolisOSHostname(Hostname):
platform = 'Linux'
distribution = 'Anolis'
strategy_class = RedHatStrategy
class CloudlinuxserverHostname(Hostname):
platform = 'Linux'
distribution = 'Cloudlinuxserver'
strategy_class = RedHatStrategy
class CloudlinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Cloudlinux'
strategy_class = RedHatStrategy
class AlinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Alinux'
strategy_class = RedHatStrategy
class ScientificHostname(Hostname):
platform = 'Linux'
distribution = 'Scientific'
strategy_class = RedHatStrategy
class OracleLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Oracle'
strategy_class = RedHatStrategy
class VirtuozzoLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Virtuozzo'
strategy_class = RedHatStrategy
class AmazonLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Amazon'
strategy_class = RedHatStrategy
class DebianHostname(Hostname):
platform = 'Linux'
distribution = 'Debian'
strategy_class = FileStrategy
class KylinHostname(Hostname):
platform = 'Linux'
distribution = 'Kylin'
strategy_class = FileStrategy
class CumulusHostname(Hostname):
platform = 'Linux'
distribution = 'Cumulus-linux'
strategy_class = FileStrategy
class KaliHostname(Hostname):
platform = 'Linux'
distribution = 'Kali'
strategy_class = FileStrategy
class ParrotHostname(Hostname):
platform = 'Linux'
distribution = 'Parrot'
strategy_class = FileStrategy
class UbuntuHostname(Hostname):
platform = 'Linux'
distribution = 'Ubuntu'
strategy_class = FileStrategy
class LinuxmintHostname(Hostname):
platform = 'Linux'
distribution = 'Linuxmint'
strategy_class = FileStrategy
class LinaroHostname(Hostname):
platform = 'Linux'
distribution = 'Linaro'
strategy_class = FileStrategy
class DevuanHostname(Hostname):
platform = 'Linux'
distribution = 'Devuan'
strategy_class = FileStrategy
class RaspbianHostname(Hostname):
platform = 'Linux'
distribution = 'Raspbian'
strategy_class = FileStrategy
class UosHostname(Hostname):
platform = 'Linux'
distribution = 'Uos'
strategy_class = FileStrategy
class DeepinHostname(Hostname):
platform = 'Linux'
distribution = 'Deepin'
strategy_class = FileStrategy
class GentooHostname(Hostname):
platform = 'Linux'
distribution = 'Gentoo'
strategy_class = OpenRCStrategy
class ALTLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Altlinux'
strategy_class = RedHatStrategy
class AlpineLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Alpine'
strategy_class = AlpineStrategy
class OpenBSDHostname(Hostname):
platform = 'OpenBSD'
distribution = None
strategy_class = OpenBSDStrategy
class SolarisHostname(Hostname):
platform = 'SunOS'
distribution = None
strategy_class = SolarisStrategy
class FreeBSDHostname(Hostname):
platform = 'FreeBSD'
distribution = None
strategy_class = FreeBSDStrategy
class NetBSDHostname(Hostname):
platform = 'NetBSD'
distribution = None
strategy_class = FreeBSDStrategy
class NeonHostname(Hostname):
platform = 'Linux'
distribution = 'Neon'
strategy_class = FileStrategy
class DarwinHostname(Hostname):
platform = 'Darwin'
distribution = None
strategy_class = DarwinStrategy
class VoidLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Void'
strategy_class = FileStrategy
class PopHostname(Hostname):
platform = 'Linux'
distribution = 'Pop'
strategy_class = FileStrategy
class EurolinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Eurolinux'
strategy_class = RedHatStrategy
def main():
module = AnsibleModule(
argument_spec=dict(
name=dict(type='str', required=True),
use=dict(type='str', choices=list(STRATS.keys()))
),
supports_check_mode=True,
)
hostname = Hostname(module)
name = module.params['name']
current_hostname = hostname.get_current_hostname()
permanent_hostname = hostname.get_permanent_hostname()
changed = hostname.update_current_and_permanent_hostname()
if name != current_hostname:
name_before = current_hostname
elif name != permanent_hostname:
name_before = permanent_hostname
else:
name_before = permanent_hostname
# NOTE: socket.getfqdn() calls gethostbyaddr(socket.gethostname()), which can be
# slow to return if the name does not resolve correctly.
kw = dict(changed=changed, name=name,
ansible_facts=dict(ansible_hostname=name.split('.')[0],
ansible_nodename=name,
ansible_fqdn=socket.getfqdn(),
ansible_domain='.'.join(socket.getfqdn().split('.')[1:])))
if changed:
kw['diff'] = {'after': 'hostname = ' + name + '\n',
'before': 'hostname = ' + name_before + '\n'}
module.exit_json(**kw)
if __name__ == '__main__':
main()