Current File : //proc/self/root/usr/lib/python2.7/site-packages/ansible/modules/core/system/hostname.py
#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2013, Hiroaki Nakamura <hnakamur@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
DOCUMENTATION = '''
---
module: hostname
author:
- "Hiroaki Nakamura (@hnakamur)"
- "Hideki Saito (@saito-hideki)"
version_added: "1.4"
short_description: Manage hostname
requirements: [ hostname ]
description:
- Set system's hostname.
- Currently implemented on Debian, Ubuntu, Fedora, RedHat, openSUSE, Linaro, ScientificLinux, Arch, CentOS, AMI.
- Any distribution that uses systemd as their init system.
- Note, this module does *NOT* modify /etc/hosts. You need to modify it yourself using other modules like template or replace.
options:
name:
required: true
description:
- Name of the host
'''
EXAMPLES = '''
- hostname: name=web01
'''
import socket
from distutils.version import LooseVersion
# import module snippets
from ansible.module_utils.basic import *
from ansible.module_utils.facts import *
from ansible.module_utils._text import to_bytes, to_native
class UnimplementedStrategy(object):
def __init__(self, module):
self.module = module
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):
platform = get_platform()
distribution = get_distribution()
if distribution is not None:
msg_platform = '%s (%s)' % (platform, distribution)
else:
msg_platform = platform
self.module.fail_json(
msg='hostname module cannot be used on platform %s' % msg_platform)
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
strategy_class = UnimplementedStrategy
def __new__(cls, *args, **kwargs):
return load_platform_subclass(Hostname, args, kwargs)
def __init__(self, module):
self.module = module
self.name = module.params['name']
if self.platform == 'Linux' and Facts(module).is_systemd_managed():
self.strategy = SystemdStrategy(module)
else:
self.strategy = self.strategy_class(module)
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 GenericStrategy(object):
"""
This is a generic Hostname manipulation strategy class.
A subclass may wish to override some or all of these methods.
- get_current_hostname()
- get_permanent_hostname()
- set_current_hostname(name)
- set_permanent_hostname(name)
"""
def __init__(self, module):
self.module = module
self.hostname_cmd = self.module.get_bin_path('hostname', 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 None
def set_permanent_hostname(self, name):
pass
# ===========================================
class DebianStrategy(GenericStrategy):
"""
This is a Debian family Hostname manipulation strategy class - it edits
the /etc/hostname file.
"""
HOSTNAME_FILE = '/etc/hostname'
def get_permanent_hostname(self):
if not os.path.isfile(self.HOSTNAME_FILE):
try:
open(self.HOSTNAME_FILE, "a").write("")
except IOError:
err = get_exception()
self.module.fail_json(msg="failed to write file: %s" %
str(err))
try:
f = open(self.HOSTNAME_FILE)
try:
return f.read().strip()
finally:
f.close()
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to read hostname: %s" %
str(err))
def set_permanent_hostname(self, name):
try:
f = open(self.HOSTNAME_FILE, 'w+')
try:
f.write("%s\n" % name)
finally:
f.close()
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to update hostname: %s" %
str(err))
# ===========================================
class SLESStrategy(GenericStrategy):
"""
This is a SLES Hostname strategy class - it edits the
/etc/HOSTNAME file.
"""
HOSTNAME_FILE = '/etc/HOSTNAME'
def get_permanent_hostname(self):
if not os.path.isfile(self.HOSTNAME_FILE):
try:
open(self.HOSTNAME_FILE, "a").write("")
except IOError:
err = get_exception()
self.module.fail_json(msg="failed to write file: %s" %
str(err))
try:
f = open(self.HOSTNAME_FILE)
try:
return f.read().strip()
finally:
f.close()
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to read hostname: %s" %
str(err))
def set_permanent_hostname(self, name):
try:
f = open(self.HOSTNAME_FILE, 'w+')
try:
f.write("%s\n" % name)
finally:
f.close()
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to update hostname: %s" %
str(err))
# ===========================================
class RedHatStrategy(GenericStrategy):
"""
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:
f = open(self.NETWORK_FILE, 'rb')
try:
for line in f.readlines():
if line.startswith('HOSTNAME'):
k, v = line.split('=')
return v.strip()
finally:
f.close()
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to read hostname: %s" %
str(err))
def set_permanent_hostname(self, name):
try:
lines = []
found = False
f = open(self.NETWORK_FILE, 'rb')
try:
for line in f.readlines():
if line.startswith('HOSTNAME'):
lines.append("HOSTNAME=%s\n" % name)
found = True
else:
lines.append(line)
finally:
f.close()
if not found:
lines.append("HOSTNAME=%s\n" % name)
f = open(self.NETWORK_FILE, 'w+')
try:
f.writelines(lines)
finally:
f.close()
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to update hostname: %s" %
str(err))
# ===========================================
class SystemdStrategy(GenericStrategy):
"""
This is a Systemd hostname manipulation strategy class - it uses
the hostnamectl command.
"""
def get_current_hostname(self):
cmd = ['hostname']
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 = ['hostnamectl', '--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 = ['hostnamectl', '--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 = ['hostnamectl', '--pretty', '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))
cmd = ['hostnamectl', '--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))
# ===========================================
class OpenRCStrategy(GenericStrategy):
"""
This is a Gentoo (OpenRC) Hostname manipulation strategy class - it edits
the /etc/conf.d/hostname file.
"""
HOSTNAME_FILE = '/etc/conf.d/hostname'
def get_permanent_hostname(self):
try:
try:
f = open(self.HOSTNAME_FILE, 'r')
for line in f:
line = line.strip()
if line.startswith('hostname='):
return line[10:].strip('"')
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to read hostname: %s" % str(err))
finally:
f.close()
return None
def set_permanent_hostname(self, name):
try:
try:
f = open(self.HOSTNAME_FILE, 'r')
lines = [x.strip() for x in f]
for i, line in enumerate(lines):
if line.startswith('hostname='):
lines[i] = 'hostname="%s"' % name
break
f.close()
f = open(self.HOSTNAME_FILE, 'w')
f.write('\n'.join(lines) + '\n')
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to update hostname: %s" % str(err))
finally:
f.close()
# ===========================================
class OpenBSDStrategy(GenericStrategy):
"""
This is a OpenBSD family Hostname manipulation strategy class - it edits
the /etc/myname file.
"""
HOSTNAME_FILE = '/etc/myname'
def get_permanent_hostname(self):
if not os.path.isfile(self.HOSTNAME_FILE):
try:
open(self.HOSTNAME_FILE, "a").write("")
except IOError:
err = get_exception()
self.module.fail_json(msg="failed to write file: %s" %
str(err))
try:
f = open(self.HOSTNAME_FILE)
try:
return f.read().strip()
finally:
f.close()
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to read hostname: %s" %
str(err))
def set_permanent_hostname(self, name):
try:
f = open(self.HOSTNAME_FILE, 'w+')
try:
f.write("%s\n" % name)
finally:
f.close()
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to update hostname: %s" %
str(err))
# ===========================================
class SolarisStrategy(GenericStrategy):
"""
This is a Solaris11 or later Hostname manipulation strategy class - it
execute hostname command.
"""
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(GenericStrategy):
"""
This is a FreeBSD hostname manipulation strategy class - it edits
the /etc/rc.conf.d/hostname file.
"""
HOSTNAME_FILE = '/etc/rc.conf.d/hostname'
def get_permanent_hostname(self):
if not os.path.isfile(self.HOSTNAME_FILE):
try:
open(self.HOSTNAME_FILE, "a").write("hostname=temporarystub\n")
except IOError:
err = get_exception()
self.module.fail_json(msg="failed to write file: %s" %
str(err))
try:
try:
f = open(self.HOSTNAME_FILE, 'r')
for line in f:
line = line.strip()
if line.startswith('hostname='):
return line[10:].strip('"')
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to read hostname: %s" % str(err))
finally:
f.close()
return None
def set_permanent_hostname(self, name):
try:
try:
f = open(self.HOSTNAME_FILE, 'r')
lines = [x.strip() for x in f]
for i, line in enumerate(lines):
if line.startswith('hostname='):
lines[i] = 'hostname="%s"' % name
break
f.close()
f = open(self.HOSTNAME_FILE, 'w')
f.write('\n'.join(lines) + '\n')
except Exception:
err = get_exception()
self.module.fail_json(msg="failed to update hostname: %s" % str(err))
finally:
f.close()
# ===========================================
class FedoraHostname(Hostname):
platform = 'Linux'
distribution = 'Fedora'
strategy_class = SystemdStrategy
class SLESHostname(Hostname):
platform = 'Linux'
distribution = 'Suse linux enterprise server '
distribution_version = get_distribution_version()
if distribution_version and LooseVersion("10") <= LooseVersion(distribution_version) <= LooseVersion("12"):
strategy_class = SLESStrategy
else:
strategy_class = UnimplementedStrategy
class OpenSUSEHostname(Hostname):
platform = 'Linux'
distribution = 'Opensuse '
strategy_class = SystemdStrategy
class ArchHostname(Hostname):
platform = 'Linux'
distribution = 'Arch'
strategy_class = SystemdStrategy
class RedHat5Hostname(Hostname):
platform = 'Linux'
distribution = 'Redhat'
strategy_class = RedHatStrategy
class RedHatServerHostname(Hostname):
platform = 'Linux'
distribution = 'Red hat enterprise linux server'
strategy_class = RedHatStrategy
class RedHatWorkstationHostname(Hostname):
platform = 'Linux'
distribution = 'Red hat enterprise linux workstation'
strategy_class = RedHatStrategy
class CentOSHostname(Hostname):
platform = 'Linux'
distribution = 'Centos'
strategy_class = RedHatStrategy
class CentOSLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Centos linux'
strategy_class = RedHatStrategy
class ScientificHostname(Hostname):
platform = 'Linux'
distribution = 'Scientific'
strategy_class = RedHatStrategy
class ScientificLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Scientific linux'
strategy_class = RedHatStrategy
class ScientificLinuxCERNHostname(Hostname):
platform = 'Linux'
distribution = 'Scientific linux cern slc'
strategy_class = RedHatStrategy
class OracleLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Oracle linux server'
strategy_class = RedHatStrategy
class AmazonLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Amazon'
strategy_class = RedHatStrategy
class DebianHostname(Hostname):
platform = 'Linux'
distribution = 'Debian'
strategy_class = DebianStrategy
class KaliHostname(Hostname):
platform = 'Linux'
distribution = 'Kali'
strategy_class = DebianStrategy
class UbuntuHostname(Hostname):
platform = 'Linux'
distribution = 'Ubuntu'
strategy_class = DebianStrategy
class LinuxmintHostname(Hostname):
platform = 'Linux'
distribution = 'Linuxmint'
strategy_class = DebianStrategy
class LinaroHostname(Hostname):
platform = 'Linux'
distribution = 'Linaro'
strategy_class = DebianStrategy
class GentooHostname(Hostname):
platform = 'Linux'
distribution = 'Gentoo base system'
strategy_class = OpenRCStrategy
class ALTLinuxHostname(Hostname):
platform = 'Linux'
distribution = 'Altlinux'
strategy_class = RedHatStrategy
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
# ===========================================
def main():
module = AnsibleModule(
argument_spec = dict(
name=dict(required=True)
)
)
hostname = Hostname(module)
changed = False
name = module.params['name']
current_name = hostname.get_current_hostname()
if current_name != name:
hostname.set_current_hostname(name)
changed = True
permanent_name = hostname.get_permanent_hostname()
if permanent_name != name:
hostname.set_permanent_hostname(name)
changed = True
module.exit_json(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 __name__ == '__main__':
main()
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