172 lines
6.6 KiB
Python
172 lines
6.6 KiB
Python
# Copyright (c) 2012 OpenStack, LLC.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from sqlalchemy.orm import exc
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from quantum.api.v2 import attributes
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from quantum import manager
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from quantum.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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class DhcpRpcCallbackMixin(object):
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"""A mix-in that enable DHCP agent support in plugin implementations."""
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def get_active_networks(self, context, **kwargs):
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"""Retrieve and return a list of the active network ids."""
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host = kwargs.get('host')
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LOG.debug('Network list requested from %s', host)
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plugin = manager.QuantumManager.get_plugin()
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filters = dict(admin_state_up=[True])
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return [net['id'] for net in
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plugin.get_networks(context, filters=filters)]
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def get_network_info(self, context, **kwargs):
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"""Retrieve and return a extended information about a network."""
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network_id = kwargs.get('network_id')
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plugin = manager.QuantumManager.get_plugin()
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network = plugin.get_network(context, network_id)
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filters = dict(network_id=[network_id])
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network['subnets'] = plugin.get_subnets(context, filters=filters)
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network['ports'] = plugin.get_ports(context, filters=filters)
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return network
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def get_dhcp_port(self, context, **kwargs):
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"""Allocate a DHCP port for the host and return port information.
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This method will re-use an existing port if one already exists. When a
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port is re-used, the fixed_ip allocation will be updated to the current
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network state.
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"""
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host = kwargs.get('host')
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network_id = kwargs.get('network_id')
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device_id = kwargs.get('device_id')
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# There could be more than one dhcp server per network, so create
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# a device id that combines host and network ids
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LOG.debug('Port %s for %s requested from %s', device_id, network_id,
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host)
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plugin = manager.QuantumManager.get_plugin()
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retval = None
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filters = dict(network_id=[network_id])
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subnets = dict([(s['id'], s) for s in
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plugin.get_subnets(context, filters=filters)])
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dhcp_enabled_subnet_ids = [s['id'] for s in
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subnets.values() if s['enable_dhcp']]
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try:
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filters = dict(network_id=[network_id], device_id=[device_id])
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ports = plugin.get_ports(context, filters=filters)
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if len(ports):
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# Ensure that fixed_ips cover all dhcp_enabled subnets.
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port = ports[0]
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for fixed_ip in port['fixed_ips']:
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if fixed_ip['subnet_id'] in dhcp_enabled_subnet_ids:
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dhcp_enabled_subnet_ids.remove(fixed_ip['subnet_id'])
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port['fixed_ips'].extend(
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[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
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retval = plugin.update_port(context, port['id'],
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dict(port=port))
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except exc.NoResultFound:
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pass
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if retval is None:
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# No previous port exists, so create a new one.
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LOG.debug('DHCP port %s on network %s does not exist on %s',
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device_id, network_id, host)
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network = plugin.get_network(context, network_id)
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port_dict = dict(
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admin_state_up=True,
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device_id=device_id,
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network_id=network_id,
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tenant_id=network['tenant_id'],
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mac_address=attributes.ATTR_NOT_SPECIFIED,
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name='',
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device_owner='network:dhcp',
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fixed_ips=[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
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retval = plugin.create_port(context, dict(port=port_dict))
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# Convert subnet_id to subnet dict
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for fixed_ip in retval['fixed_ips']:
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subnet_id = fixed_ip.pop('subnet_id')
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fixed_ip['subnet'] = subnets[subnet_id]
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return retval
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def release_dhcp_port(self, context, **kwargs):
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"""Release the port currently being used by a DHCP agent."""
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host = kwargs.get('host')
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network_id = kwargs.get('network_id')
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device_id = kwargs.get('device_id')
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LOG.debug('DHCP port deletion for %s d request from %s', network_id,
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host)
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plugin = manager.QuantumManager.get_plugin()
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filters = dict(network_id=[network_id], device_id=[device_id])
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ports = plugin.get_ports(context, filters=filters)
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if len(ports):
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plugin.delete_port(context, ports[0]['id'])
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def release_port_fixed_ip(self, context, **kwargs):
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"""Release the fixed_ip associated the subnet on a port."""
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host = kwargs.get('host')
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network_id = kwargs.get('network_id')
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device_id = kwargs.get('device_id')
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subnet_id = kwargs.get('subnet_id')
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LOG.debug('DHCP port remove fixed_ip for %s d request from %s',
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subnet_id,
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host)
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plugin = manager.QuantumManager.get_plugin()
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filters = dict(network_id=[network_id], device_id=[device_id])
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ports = plugin.get_ports(context, filters=filters)
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if len(ports):
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port = ports[0]
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fixed_ips = port.get('fixed_ips', [])
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for i in range(len(fixed_ips)):
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if fixed_ips[i]['subnet_id'] == subnet_id:
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del fixed_ips[i]
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break
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plugin.update_port(context, port['id'], dict(port=port))
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def update_lease_expiration(self, context, **kwargs):
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"""Release the fixed_ip associated the subnet on a port."""
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host = kwargs.get('host')
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network_id = kwargs.get('network_id')
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ip_address = kwargs.get('ip_address')
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lease_remaining = kwargs.get('lease_remaining')
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LOG.debug('Updating lease expiration for %s on network %s from %s.',
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ip_address, network_id, host)
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plugin = manager.QuantumManager.get_plugin()
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plugin.update_fixed_ip_lease_expiration(context, network_id,
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ip_address, lease_remaining)
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