mirror of https://github.com/ansible/ansible.git
Merge branch 'feature/host' of https://github.com/resmo/ansible into resmo-feature/host
James Cammarata
11 years ago
commit
da0d50c383
@ -0,0 +1,199 @@
|
||||
#!/usr/bin/python
|
||||
# -*- coding: utf-8 -*-
|
||||
#
|
||||
# (c) 2013, René Moser <mail@renemoser.net>
|
||||
#
|
||||
# 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: host
|
||||
author: René Moser
|
||||
version_added: "1.4"
|
||||
short_description: Add or remove entries in /etc/hosts.
|
||||
requirements:
|
||||
description:
|
||||
- Manage entries in /etc/hosts
|
||||
options:
|
||||
ip:
|
||||
required: false
|
||||
description:
|
||||
- IP address. Required on state "present".
|
||||
hostname:
|
||||
required: false
|
||||
description:
|
||||
- name of host. Required on state "present".
|
||||
aliases:
|
||||
required: false
|
||||
description:
|
||||
- list of alias hostnames, comma separated.
|
||||
state:
|
||||
required: false
|
||||
default: "present"
|
||||
choices: [ present, absent ]
|
||||
description:
|
||||
- Whether the entries should be present or not in /etc/hosts.
|
||||
'''
|
||||
|
||||
EXAMPLES = '''
|
||||
# Example host command from Ansible Playbooks
|
||||
- host: ip=127.0.0.1 hostname=localhost aliases=foobar.com,localhost.foobar.com
|
||||
- host: ip=127.0.0.1 hostname=localhost state=present
|
||||
- host: ip=192.168.1.1 state=absent
|
||||
- host: hostname=localhost state=absent
|
||||
- host: ip=::1 hostname=localhost aliases=ip6-localhost,ip6-loopback
|
||||
'''
|
||||
|
||||
import os
|
||||
import tempfile
|
||||
import fileinput
|
||||
|
||||
class Host(object):
|
||||
|
||||
HOSTSFILE = '/etc/hosts'
|
||||
|
||||
def __init__(self, module):
|
||||
self.module = module
|
||||
self.state = module.params['state']
|
||||
self.ip = module.params['ip']
|
||||
self.hostname = module.params['hostname']
|
||||
self.aliases = module.params['aliases']
|
||||
|
||||
self._ip_matches = False
|
||||
self._hostname_matches = False
|
||||
self._aliases_matches = False
|
||||
self._has_aliases = False
|
||||
self._found_on_line = -1
|
||||
|
||||
def validate_has_hostname_on_present(self):
|
||||
err = ''
|
||||
if self.state == 'present' and not (self.hostname and self.ip):
|
||||
err = "Error: No param 'hostnames' or 'ip' given in state 'present'."
|
||||
return err
|
||||
|
||||
def validate_has_ip_or_hostname_on_absent(self):
|
||||
err = ''
|
||||
if self.state == 'absent':
|
||||
if not (self.hostname or self.ip):
|
||||
err = "Error: Either param 'hostnames' or 'ip' must be given in state 'absent'."
|
||||
if self.hostname and self.ip:
|
||||
err = "Error: Either param 'hostnames' or 'ip' must be given in state 'absent'."
|
||||
return err
|
||||
|
||||
def proceed_hosts_entries(self):
|
||||
|
||||
f = open(self.HOSTSFILE,'rb')
|
||||
self._hostsfile_lines = f.readlines()
|
||||
f.close()
|
||||
|
||||
for lineno, line in enumerate(self._hostsfile_lines):
|
||||
if line.startswith("#"):
|
||||
continue
|
||||
|
||||
ip = line.split()[0:1]
|
||||
hostname = line.split()[1:2]
|
||||
aliases = ','.join(line.split()[2:])
|
||||
|
||||
if self.ip and self.ip in ip:
|
||||
self._ip_matches = True
|
||||
self._found_on_line = lineno
|
||||
|
||||
if self.hostname and self.hostname in hostname:
|
||||
self._hostname_matches = True
|
||||
self._found_on_line = lineno
|
||||
|
||||
# only look at aliases if we found hostname or ip
|
||||
if self._hostname_matches or self._ip_matches:
|
||||
if aliases:
|
||||
self._has_aliases = True
|
||||
if self.aliases and self.aliases == aliases:
|
||||
self._aliases_matches = True
|
||||
break
|
||||
|
||||
def full_entry_exists(self):
|
||||
if self._has_aliases and not self._aliases_matches:
|
||||
return False
|
||||
return self._ip_matches and self.hostname_matches
|
||||
|
||||
def entry_exists(self):
|
||||
return self._ip_matches or self.hostname_matches
|
||||
|
||||
def remove_entry(self):
|
||||
self._hostsfile_lines.pop(self._found_on_line)
|
||||
|
||||
def add_entry(self):
|
||||
aliases = ''
|
||||
if self.aliases:
|
||||
aliases = self.aliases.replace(',',' ')
|
||||
host_entry = self.ip + " " + self.hostname + " " + aliases + "\n"
|
||||
if self.entry_exists():
|
||||
self._hostsfile_lines[self._found_on_line] = host_entry
|
||||
else:
|
||||
self._hostsfile_lines.extend(host_entry)
|
||||
|
||||
def write_changes(self):
|
||||
tmpfd, tmpfile = tempfile.mkstemp()
|
||||
f = os.fdopen(tmpfd,'wb')
|
||||
f.writelines(self._hostsfile_lines)
|
||||
f.close()
|
||||
self.module.atomic_move(tmpfile, self.HOSTSFILE)
|
||||
|
||||
def main():
|
||||
module = AnsibleModule(
|
||||
argument_spec = dict(
|
||||
state=dict(default='present', choices=['present', 'absent'], type='str'),
|
||||
ip=dict(default=None, type='str'),
|
||||
hostname=dict(default=None, type='str'),
|
||||
aliases=dict(default=None, type='str'),
|
||||
),
|
||||
supports_check_mode=True
|
||||
)
|
||||
|
||||
result = {}
|
||||
host = Host(module)
|
||||
result['state'] = host.state
|
||||
result['changed'] = false
|
||||
|
||||
err = host.validate_has_hostname_on_present()
|
||||
if err:
|
||||
module.fail_json(msg=err)
|
||||
|
||||
err = host.validate_has_ip_or_hostname_on_absent()
|
||||
if err:
|
||||
module.fail_json(msg=err)
|
||||
|
||||
host.proceed_hosts_entries()
|
||||
if host.state == 'present':
|
||||
if not host.full_entry_exists():
|
||||
if module.check_mode:
|
||||
module.exit_json(changed=True)
|
||||
host.add_entry()
|
||||
host.write_changes()
|
||||
result['changed'] = True
|
||||
|
||||
elif host.state == 'absent':
|
||||
if host.entry_exists():
|
||||
if module.check_mode:
|
||||
module.exit_json(changed=True)
|
||||
host.remove_entry()
|
||||
host.write_changes()
|
||||
result['changed'] = True
|
||||
|
||||
module.exit_json(**result)
|
||||
|
||||
# include magic from lib/ansible/module_common.py
|
||||
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
|
||||
main()
|
||||
Loading…
Reference in New Issue