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269 lines
8.4 KiB
Python
269 lines
8.4 KiB
Python
#!/usr/bin/python
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#coding: utf-8 -*-
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# (c) 2013, David Stygstra <david.stygstra@gmail.com>
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#
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# Portions copyright @ 2015 VMware, Inc.
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#
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# This file is part of Ansible
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#
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# This module is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This software is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this software. If not, see <http://www.gnu.org/licenses/>.
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# pylint: disable=C0111
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DOCUMENTATION = '''
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---
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module: openvswitch_bridge
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version_added: 1.4
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author: "David Stygstra (@stygstra)"
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short_description: Manage Open vSwitch bridges
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requirements: [ ovs-vsctl ]
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description:
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- Manage Open vSwitch bridges
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options:
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bridge:
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required: true
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description:
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- Name of bridge to manage
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state:
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required: false
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default: "present"
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choices: [ present, absent ]
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description:
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- Whether the bridge should exist
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timeout:
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required: false
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default: 5
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description:
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- How long to wait for ovs-vswitchd to respond
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external_ids:
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version_added: 2.0
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required: false
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default: None
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description:
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- A dictionary of external-ids. Omitting this parameter is a No-op.
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To clear all external-ids pass an empty value.
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fail_mode:
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version_added: 2.0
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default: None
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required: false
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choices : [secure, standalone]
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description:
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- Set bridge fail-mode. The default value (None) is a No-op.
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'''
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EXAMPLES = '''
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# Create a bridge named br-int
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- openvswitch_bridge: bridge=br-int state=present
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# Create an integration bridge
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- openvswitch_bridge: bridge=br-int state=present fail_mode=secure
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args:
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external_ids:
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bridge-id: "br-int"
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'''
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import syslog
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class OVSBridge(object):
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""" Interface to ovs-vsctl. """
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def __init__(self, module):
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self.module = module
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self.bridge = module.params['bridge']
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self.state = module.params['state']
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self.timeout = module.params['timeout']
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self.fail_mode = module.params['fail_mode']
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def _vsctl(self, command):
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'''Run ovs-vsctl command'''
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return self.module.run_command(['ovs-vsctl', '-t',
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str(self.timeout)] + command)
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def exists(self):
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'''Check if the bridge already exists'''
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rtc, _, err = self._vsctl(['br-exists', self.bridge])
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if rtc == 0: # See ovs-vsctl(8) for status codes
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return True
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if rtc == 2:
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return False
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self.module.fail_json(msg=err)
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def add(self):
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'''Create the bridge'''
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rtc, _, err = self._vsctl(['add-br', self.bridge])
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if rtc != 0:
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self.module.fail_json(msg=err)
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if self.fail_mode:
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self.set_fail_mode()
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def delete(self):
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'''Delete the bridge'''
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rtc, _, err = self._vsctl(['del-br', self.bridge])
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if rtc != 0:
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self.module.fail_json(msg=err)
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def check(self):
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'''Run check mode'''
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changed = False
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# pylint: disable=W0703
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try:
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if self.state == 'present' and self.exists():
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if (self.fail_mode and
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(self.fail_mode != self.get_fail_mode())):
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changed = True
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##
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# Check if external ids would change.
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current_external_ids = self.get_external_ids()
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items = self.module.params['external_ids'].items()
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for (key, value) in items:
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if ((key in current_external_ids) and
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(value != current_external_ids[key])):
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changed = True
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##
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# Check if external ids would be removed.
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for (key, value) in current_external_ids.items():
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if key not in self.module.params['external_ids']:
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changed = True
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elif self.state == 'absent' and self.exists():
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changed = True
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elif self.state == 'present' and not self.exists():
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changed = True
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except Exception, earg:
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self.module.fail_json(msg=str(earg))
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# pylint: enable=W0703
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self.module.exit_json(changed=changed)
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def run(self):
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'''Make the necessary changes'''
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changed = False
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# pylint: disable=W0703
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try:
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if self.state == 'absent':
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if self.exists():
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self.delete()
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changed = True
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elif self.state == 'present':
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if not self.exists():
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self.add()
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changed = True
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current_fail_mode = self.get_fail_mode()
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if self.fail_mode and (self.fail_mode != current_fail_mode):
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syslog.syslog(syslog.LOG_NOTICE,
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"changing fail mode %s to %s" %
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(current_fail_mode, self.fail_mode))
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self.set_fail_mode()
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changed = True
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current_external_ids = self.get_external_ids()
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##
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# Change and add existing external ids.
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items = self.module.params['external_ids'].items()
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for (key, value) in items:
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if (value != current_external_ids.get(key, None)):
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changed = self.set_external_id(key, value) or changed
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##
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# Remove current external ids that are not passed in.
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for (key, value) in current_external_ids.items():
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if key not in self.module.params['external_ids']:
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changed = self.set_external_id(key, None) or changed
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except Exception, earg:
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self.module.fail_json(msg=str(earg))
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# pylint: enable=W0703
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self.module.exit_json(changed=changed)
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def get_external_ids(self):
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""" Return the bridge's external ids as a dict. """
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if self.exists():
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rtc, out, err = self._vsctl(['br-get-external-id', self.bridge])
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if rtc != 0:
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self.module.fail_json(msg=err)
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lines = out.split("\n")
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lines = [item.split("=") for item in lines if (len(item) > 0)]
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return {item[0]: item[1] for item in lines}
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return {}
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def set_external_id(self, key, value):
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""" Set external id. """
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if self.exists():
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cmd = ['br-set-external-id', self.bridge, key]
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if (value):
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cmd += [value]
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(rtc, _, err) = self._vsctl(cmd)
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if rtc != 0:
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self.module.fail_json(msg=err)
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return True
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return False
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def get_fail_mode(self):
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""" Get failure mode. """
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value = ''
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if self.exists():
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rtc, out, err = self._vsctl(['get-fail-mode', self.bridge])
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if rtc != 0:
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self.module.fail_json(msg=err)
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value = out.strip("\n")
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return value
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def set_fail_mode(self):
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""" Set failure mode. """
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if self.exists():
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(rtc, _, err) = self._vsctl(['set-fail-mode', self.bridge,
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self.fail_mode])
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if rtc != 0:
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self.module.fail_json(msg=err)
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# pylint: disable=E0602
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def main():
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""" Entry point. """
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module = AnsibleModule(
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argument_spec={
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'bridge': {'required': True},
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'state': {'default': 'present', 'choices': ['present', 'absent']},
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'timeout': {'default': 5, 'type': 'int'},
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'external_ids': {'default': None},
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'fail_mode': {'default': None},
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},
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supports_check_mode=True,
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)
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bridge = OVSBridge(module)
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if module.check_mode:
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bridge.check()
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else:
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bridge.run()
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# pylint: disable=W0614
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# pylint: disable=W0401
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# pylint: disable=W0622
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# import module snippets
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from ansible.module_utils.basic import *
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main()
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