Merge pull request #3940 from hnakamur/hostname_module
Add a hostname module, which sets system's hostname.
This commit is contained in:
jctanner
commit
01a054d2be
1 changed files with 319 additions and 0 deletions
319
library/system/hostname
Normal file
319
library/system/hostname
Normal file
|
|
@ -0,0 +1,319 @@
|
|||
#!/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
|
||||
version_added: "1.3"
|
||||
short_description: Manage hostname
|
||||
requirements: [ hostname ]
|
||||
description:
|
||||
- Set system's hostname
|
||||
- Currently implemented on only Debian, Ubuntu, RedHat and CentOS.
|
||||
options:
|
||||
name:
|
||||
required: true
|
||||
description:
|
||||
- Name of the host
|
||||
'''
|
||||
|
||||
EXAMPLES = '''
|
||||
- hostname: name=web01
|
||||
'''
|
||||
|
||||
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']
|
||||
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
|
||||
|
||||
HOSTNAME_CMD = '/bin/hostname'
|
||||
|
||||
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 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):
|
||||
try:
|
||||
f = open(self.HOSTNAME_FILE)
|
||||
try:
|
||||
return f.read().strip()
|
||||
finally:
|
||||
f.close()
|
||||
except Exception, err:
|
||||
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:
|
||||
self.module.fail_json(msg="failed to update hostname: %s" %
|
||||
str(err))
|
||||
|
||||
class DebianHostname(Hostname):
|
||||
platform = 'Linux'
|
||||
distribution = 'Debian'
|
||||
strategy_class = DebianStrategy
|
||||
|
||||
class UbuntuHostname(Hostname):
|
||||
platform = 'Linux'
|
||||
distribution = 'Ubuntu'
|
||||
strategy_class = DebianStrategy
|
||||
|
||||
# ===========================================
|
||||
|
||||
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:
|
||||
self.module.fail_json(msg="failed to read hostname: %s" %
|
||||
str(err))
|
||||
|
||||
def set_permanent_hostname(self, name):
|
||||
try:
|
||||
lines = []
|
||||
f = open(self.NETWORK_FILE, 'rb')
|
||||
try:
|
||||
for line in f.readlines():
|
||||
if line.startswith('HOSTNAME'):
|
||||
lines.append("HOSTNAME=%s\n" % name)
|
||||
else:
|
||||
lines.append(line)
|
||||
finally:
|
||||
f.close()
|
||||
f = open(self.NETWORK_FILE, 'w+')
|
||||
try:
|
||||
f.writelines(lines)
|
||||
finally:
|
||||
f.close()
|
||||
except Exception, err:
|
||||
self.module.fail_json(msg="failed to update hostname: %s" %
|
||||
str(err))
|
||||
|
||||
class RedHatHostname(Hostname):
|
||||
platform = 'Linux'
|
||||
distribution = 'Red hat enterprise linux server'
|
||||
strategy_class = RedHatStrategy
|
||||
|
||||
class CentOSHostname(Hostname):
|
||||
platform = 'Linux'
|
||||
distribution = 'Centos'
|
||||
strategy_class = RedHatStrategy
|
||||
|
||||
# ===========================================
|
||||
|
||||
class FedoraStrategy(GenericStrategy):
|
||||
"""
|
||||
This is a Fedora family 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 out.strip()
|
||||
|
||||
def set_current_hostname(self, 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 status | awk \'/^ *Static hostname:/{printf("%s", $3)}\''
|
||||
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 out
|
||||
|
||||
def set_permanent_hostname(self, 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 FedoraHostname(Hostname):
|
||||
platform = 'Linux'
|
||||
distribution = 'Fedora'
|
||||
strategy_class = FedoraStrategy
|
||||
|
||||
class OpenSUSEHostname(Hostname):
|
||||
platform = 'Linux'
|
||||
distribution = 'Opensuse '
|
||||
strategy_class = FedoraStrategy
|
||||
|
||||
class ArchHostname(Hostname):
|
||||
platform = 'Linux'
|
||||
distribution = 'Arch'
|
||||
strategy_class = FedoraStrategy
|
||||
|
||||
# ===========================================
|
||||
|
||||
def main():
|
||||
module = AnsibleModule(
|
||||
argument_spec = dict(
|
||||
name=dict(required=True, type='str')
|
||||
)
|
||||
)
|
||||
|
||||
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)
|
||||
|
||||
# include magic from lib/ansible/module_common.py
|
||||
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
|
||||
main()
|
||||
Loading…
Reference in a new issue