ansible/cloud/quantum_network

#!/usr/bin/python
#coding: utf-8 -*-

# (c) 2013, Benno Joy <benno@ansibleworks.com>
#
# This module 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.
#
# This software 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 this software.  If not, see <http://www.gnu.org/licenses/>.

try:
    from quantumclient.quantum import client
    from keystoneclient.v2_0 import client as ksclient
except ImportError:
    print("failed=True msg='quantunclient and keystone client are required'")

DOCUMENTATION = '''
---
module: quantum_network
short_description: Creates/Removes networks from OpenStack
description:
   - Add or Remove network from OpenStack.
options:
   login_username:
     description:
        - login username to authenticate to keystone
     required: true
     default: admin
   login_password:
     description:
        - Password of login user
     required: true
     default: True
   login_tenant_name:
     description:
        - The tenant name of the login user
     required: true
     default: True
   auth_url:
     description:
        - The keystone url for authentication
     required: false
     default: 'http://127.0.0.1:35357/v2.0/'
   region_name:
     description:
        - Name of the region
     required: false
     default: None
   state:
     description:
        - Indicate desired state of the resource
     choices: ['present', 'absent']
     default: present
   name:
     description:
        - Name to be assigned to the nework 
     required: true
     default: None
   network_type:
     description:
        - The type of the network to be created, gre, vlan, local.
     required: false
     default: local
   provider_physical_network:
     description:
        - The physical network which would realize the virtual network for flat and vlan networks.
     required: false
     default: None
   provider_segmentation_id:
     description:
        - The id that has to be assigned to the network, in case of vlan networks that would be vlan id and for gre the tunnel id
     required: false
     default: None
   router_external:
     description:
        - A value of true specifies that the virtual network is a external network (public).
     required: false
     default: false
   shared:
     description:
        - Wether this network is shared or not
     required: false
     default: false
   admin_state_up:
     description:
        - Wether the state should be marked as up or down
     required: false
     default: true
examples:
  - code: "quantum_network: state=present login_username=admin login_password=admin
                      provider_network_type=gre login_tenant_name=admin
                      provider_segmentation_id=1  tenant_name=tenant1 name=t1network"
    description: "Create's a GRE nework with tunnel id of 1 for tenant 1"
  - code: "quantum_network: state=present login_username=admin login_password=admin
                      provider_network_type=local login_tenant_name=admin
                      provider_segmentation_id=1   router_external=true name=external_network"
    description: "Create's an external,public network"
requirements: ["quantumclient", "keystoneclient"]

'''

_os_keystone = None
_os_tenant_id = None

def _get_ksclient(module, kwargs):
    try:
        kclient = ksclient.Client(username=kwargs.get('login_username'),
                                 password=kwargs.get('login_password'),
                                 tenant_name=kwargs.get('login_tenant_name'),
                                 auth_url=kwargs.get('auth_url'))
    except Exception as e:   
        module.fail_json(msg = "Error authenticating to the keystone: %s" %e.message)
    global _os_keystone 
    _os_keystone = kclient
    return kclient 
 

def _get_endpoint(module, ksclient):
    try:
        endpoint = ksclient.service_catalog.url_for(service_type='network', endpoint_type='publicURL')
    except Exception as e:
        module.fail_json(msg = "Error getting endpoint for glance: %s " %e.message)
    return endpoint

def _get_quantum_client(module, kwargs):
    _ksclient = _get_ksclient(module, kwargs)
    token = _ksclient.auth_token
    endpoint = _get_endpoint(module, _ksclient)
    kwargs = {
            'token': token,
	    'endpoint_url': endpoint
    }
    try:
    	quantum =  client.Client('2.0', **kwargs)
    except Exception as e:
        module.fail_json(msg = " Error in connecting to quantum: %s " %e.message)
    return quantum

def _set_tenant_id(module):
    global _os_tenant_id
    if not module.params['tenant_name']:
	tenant_name = module.params['login_tenant_name']
    else:
	tenant_name = module.params['tenant_name']
	
    for tenant in _os_keystone.tenants.list():
        if tenant.name == tenant_name:
            _os_tenant_id = tenant.id
            break;
    if not _os_tenant_id:
	module.fail_json(msg = "The tenant id cannot be found, please check the paramters")


def _get_net_id(quantum, module):
    kwargs = {
	    'tenant_id': _os_tenant_id,
	    'name': module.params['name'],
    }
    try:
	networks = quantum.list_networks(**kwargs)
    except Exception as e:
	module.fail_json("Error in listing quantum networks: %s" % e.message)
    if not networks['networks']:	
	return None
    return networks['networks'][0]['id']

def _create_network(module, quantum):
    quantum.format = 'json'
    network = {
	    'name': 	module.params.get('name'),
	    'tenant_id': 	_os_tenant_id,
	    'provider:network_type': module.params.get('provider_network_type'),
	    'provider:physical_network': module.params.get('provider_physical_network'),
            'provider:segmentation_id': module.params.get('provider_segmentation_id'),
	    'router:external': module.params.get('router_external'),
	    'shared': module.params.get('shared'),
	    'admin_state_up': module.params.get('admin_state_up'),
    }
    if module.params['provider_network_type'] == 'local':
	network.pop('provider:physical_network', None)
	network.pop('provider:segmentation_id', None)
    if module.params['provider_network_type'] == 'flat':
	network.pop('provider:segmentation_id', None)
    if module.params['provider_network_type'] == 'gre':
	network.pop('provider:physical_network', None)
		
    try:
	net = quantum.create_network({'network':network})
    except Exception as e:
	module.fail_json(msg = "Error in creating network: %s" % e.message)
    return net['network']['id']
		
def _delete_network(module, net_id, quantum):
    try:
	id = quantum.delete_network(net_id)
    except Exception as e: 
	module.fail_json(msg = "Error in deleting the network: %s" % e.message)
    return True

def main():
    
    module = AnsibleModule(
        argument_spec        		= dict(
        login_username         		= dict(default='admin'),
        login_password         		= dict(required=True),
        login_tenant_name      		= dict(required='True'),
        auth_url         		= dict(default='http://127.0.0.1:35357/v2.0/'),
        region_name      		= dict(default=None),
        name             		= dict(required=True),
        tenant_name                     = dict(default=None),
	provider_network_type           = dict(default='local', choices=['local', 'vlan', 'flat', 'gre']), 
	provider_physical_network       = dict(default=None), 
	provider_segmentation_id        = dict(default=None), 
        router_external			= dict(default='false', choices=BOOLEANS),
        shared				= dict(default='false', choices=BOOLEANS),
        admin_state_up			= dict(default='true', choices=BOOLEANS),
	state	         		= dict(default='present', choices=['absent', 'present'])
        ),
    )
    if module.params['provider_network_type'] in ['vlan' , 'flat']:
	    if not module.params['provider_physical_network']:
		module.fail_json(msg = " for vlan and flat networks, variable provider_physical_network should be set.")
    if module.params['provider_network_type']  in ['vlan', 'gre']:
	    if not module.params['provider_segmentation_id']:
		module.fail_json(msg = " for vlan & gre networks, variable provider_segmentation_id should be set.")
    quantum = _get_quantum_client(module, module.params)
    _set_tenant_id(module)	
    if module.params['state'] == 'present':	
       	network_id = _get_net_id(quantum, module)
	if not network_id:
	    network_id = _create_network(module, quantum)
	    module.exit_json(changed = True, result = "Created", id = network_id)
	else:
	    module.exit_json(changed = False, result = "Success", id = network_id)
    if module.params['state'] == 'absent':
       	network_id = _get_net_id(quantum, module)
	if not network_id:
	    module.exit_json(changed = False, result = "Success")
	else:
	    _delete_network(module, network_id, quantum)
	    module.exit_json(changed = True, result = "Deleted")


 

# this is magic, see lib/ansible/module.params['common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()