#!/usr/bin/python # (c) 2017, Arie Bregman <abregman@redhat.com> # # This file is a module for Ansible that interacts with Network Manager # # 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/>. from __future__ import absolute_import, division, print_function __metaclass__ = type DOCUMENTATION = ''' --- module: ip_netns author: "Arie Bregman (@bregman-arie)" short_description: Manage network namespaces requirements: [ ip ] description: - Create or delete network namespaces using the ip command. options: name: required: false description: - Name of the namespace type: str state: required: false default: "present" choices: [ present, absent ] description: - Whether the namespace should exist type: str ''' EXAMPLES = ''' - name: Create a namespace named mario community.general.ip_netns: name: mario state: present - name: Delete a namespace named luigi community.general.ip_netns: name: luigi state: absent ''' RETURN = ''' # Default return values ''' from ansible.module_utils.basic import AnsibleModule from ansible.module_utils._text import to_text class Namespace(object): """Interface to network namespaces. """ def __init__(self, module): self.module = module self.name = module.params['name'] self.state = module.params['state'] def _netns(self, command): '''Run ip nents command''' return self.module.run_command(['ip', 'netns'] + command) def exists(self): '''Check if the namespace already exists''' rc, out, err = self.module.run_command('ip netns list') if rc != 0: self.module.fail_json(msg=to_text(err)) return self.name in out def add(self): '''Create network namespace''' rtc, out, err = self._netns(['add', self.name]) if rtc != 0: self.module.fail_json(msg=err) def delete(self): '''Delete network namespace''' rtc, out, err = self._netns(['del', self.name]) if rtc != 0: self.module.fail_json(msg=err) def check(self): '''Run check mode''' changed = False if self.state == 'present' and self.exists(): changed = True elif self.state == 'absent' and self.exists(): changed = True elif self.state == 'present' and not self.exists(): changed = True self.module.exit_json(changed=changed) def run(self): '''Make the necessary changes''' changed = False if self.state == 'absent': if self.exists(): self.delete() changed = True elif self.state == 'present': if not self.exists(): self.add() changed = True self.module.exit_json(changed=changed) def main(): """Entry point.""" module = AnsibleModule( argument_spec={ 'name': {'default': None}, 'state': {'default': 'present', 'choices': ['present', 'absent']}, }, supports_check_mode=True, ) network_namespace = Namespace(module) if module.check_mode: network_namespace.check() else: network_namespace.run() if __name__ == '__main__': main()