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community.general/plugins/modules/net_tools/ip_netns.py

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2020-03-09 10:11:07 +01:00
#!/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
state:
required: false
default: "present"
choices: [ present, absent ]
description:
- Whether the namespace should exist
'''
EXAMPLES = '''
- name: Create a namespace named mario
ip_netns:
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name: mario
state: present
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- name: Delete a namespace named luigi
ip_netns:
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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()