229 lines
8.5 KiB
Python
229 lines
8.5 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 Nicira Networks, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# @author: Somik Behera, Nicira Networks, Inc.
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# @author: Brad Hall, Nicira Networks, Inc.
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# @author: Dan Wendlandt, Nicira Networks, Inc.
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# @author: Dave Lapsley, Nicira Networks, Inc.
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import logging
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from optparse import OptionParser
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import os
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import sys
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from quantum.api.api_common import OperationalStatus
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from quantum.common import exceptions as q_exc
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from quantum.common.config import find_config_file
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import quantum.db.api as db
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from quantum.plugins.openvswitch import ovs_db
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from quantum.plugins.openvswitch.common import config
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from quantum.quantum_plugin_base import QuantumPluginBase
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LOG = logging.getLogger("ovs_quantum_plugin")
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CONF_FILE = find_config_file({"plugin": "openvswitch"},
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None, "ovs_quantum_plugin.ini")
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# Exception thrown if no more VLANs are available
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class NoFreeVLANException(Exception):
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pass
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class VlanMap(object):
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vlans = {}
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net_ids = {}
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free_vlans = set()
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VLAN_MIN = 1
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VLAN_MAX = 4094
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def __init__(self):
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self.vlans.clear()
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self.net_ids.clear()
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self.free_vlans = set(xrange(self.VLAN_MIN, self.VLAN_MAX + 1))
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def already_used(self, vlan_id, network_id):
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self.free_vlans.remove(vlan_id)
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self.set_vlan(vlan_id, network_id)
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def set_vlan(self, vlan_id, network_id):
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self.vlans[vlan_id] = network_id
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self.net_ids[network_id] = vlan_id
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def acquire(self, network_id):
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if len(self.free_vlans):
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vlan = self.free_vlans.pop()
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self.set_vlan(vlan, network_id)
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LOG.debug("Allocated VLAN %s for network %s" % (vlan, network_id))
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return vlan
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else:
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raise NoFreeVLANException("No VLAN free for network %s" %
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network_id)
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def release(self, network_id):
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vlan = self.net_ids.get(network_id, None)
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if vlan is not None:
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self.free_vlans.add(vlan)
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del self.vlans[vlan]
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del self.net_ids[network_id]
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LOG.debug("Deallocated VLAN %s (used by network %s)" %
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(vlan, network_id))
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else:
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LOG.error("No vlan found with network \"%s\"", network_id)
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class OVSQuantumPlugin(QuantumPluginBase):
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def __init__(self, configfile=None):
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if configfile is None:
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if os.path.exists(CONF_FILE):
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configfile = CONF_FILE
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else:
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configfile = find_config(os.path.abspath(
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os.path.dirname(__file__)))
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if configfile is None:
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raise Exception("Configuration file \"%s\" doesn't exist" %
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(configfile))
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LOG.debug("Using configuration file: %s" % configfile)
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conf = config.parse(configfile)
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options = {"sql_connection": conf.DATABASE.sql_connection}
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reconnect_interval = conf.DATABASE.reconnect_interval
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options.update({"reconnect_interval": reconnect_interval})
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db.configure_db(options)
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self.vmap = VlanMap()
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# Populate the map with anything that is already present in the
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# database
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vlans = ovs_db.get_vlans()
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for x in vlans:
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vlan_id, network_id = x
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LOG.debug("Adding already populated vlan %s -> %s" %
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(vlan_id, network_id))
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self.vmap.already_used(vlan_id, network_id)
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def get_all_networks(self, tenant_id, **kwargs):
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nets = []
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for x in db.network_list(tenant_id):
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LOG.debug("Adding network: %s" % x.uuid)
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nets.append(self._make_net_dict(str(x.uuid), x.name,
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None, x.op_status))
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return nets
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def _make_net_dict(self, net_id, net_name, ports, op_status):
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res = {
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'net-id': net_id,
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'net-name': net_name,
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'net-op-status': op_status,
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}
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if ports:
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res['net-ports'] = ports
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return res
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def create_network(self, tenant_id, net_name, **kwargs):
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net = db.network_create(tenant_id, net_name,
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op_status=OperationalStatus.UP)
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LOG.debug("Created network: %s" % net)
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vlan_id = self.vmap.acquire(str(net.uuid))
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ovs_db.add_vlan_binding(vlan_id, str(net.uuid))
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return self._make_net_dict(str(net.uuid), net.name, [], net.op_status)
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def delete_network(self, tenant_id, net_id):
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db.validate_network_ownership(tenant_id, net_id)
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net = db.network_get(net_id)
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# Verify that no attachments are plugged into the network
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for port in db.port_list(net_id):
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if port.interface_id:
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raise q_exc.NetworkInUse(net_id=net_id)
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net = db.network_destroy(net_id)
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ovs_db.remove_vlan_binding(net_id)
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self.vmap.release(net_id)
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return self._make_net_dict(str(net.uuid), net.name, [], net.op_status)
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def get_network_details(self, tenant_id, net_id):
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db.validate_network_ownership(tenant_id, net_id)
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net = db.network_get(net_id)
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ports = self.get_all_ports(tenant_id, net_id)
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return self._make_net_dict(str(net.uuid), net.name,
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ports, net.op_status)
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def update_network(self, tenant_id, net_id, **kwargs):
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db.validate_network_ownership(tenant_id, net_id)
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net = db.network_update(net_id, tenant_id, **kwargs)
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return self._make_net_dict(str(net.uuid), net.name,
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None, net.op_status)
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def _make_port_dict(self, port):
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if port.state == "ACTIVE":
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op_status = port.op_status
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else:
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op_status = OperationalStatus.DOWN
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return {
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'port-id': str(port.uuid),
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'port-state': port.state,
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'port-op-status': op_status,
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'net-id': port.network_id,
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'attachment': port.interface_id,
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}
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def get_all_ports(self, tenant_id, net_id, **kwargs):
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ids = []
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db.validate_network_ownership(tenant_id, net_id)
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ports = db.port_list(net_id)
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# This plugin does not perform filtering at the moment
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return [{'port-id': str(p.uuid)} for p in ports]
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def create_port(self, tenant_id, net_id, port_state=None, **kwargs):
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LOG.debug("Creating port with network_id: %s" % net_id)
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db.validate_network_ownership(tenant_id, net_id)
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port = db.port_create(net_id, port_state,
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op_status=OperationalStatus.DOWN)
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return self._make_port_dict(port)
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def delete_port(self, tenant_id, net_id, port_id):
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db.validate_port_ownership(tenant_id, net_id, port_id)
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port = db.port_destroy(port_id, net_id)
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return self._make_port_dict(port)
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def update_port(self, tenant_id, net_id, port_id, **kwargs):
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"""
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Updates the state of a port on the specified Virtual Network.
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"""
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db.validate_port_ownership(tenant_id, net_id, port_id)
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port = db.port_get(port_id, net_id)
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db.port_update(port_id, net_id, **kwargs)
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return self._make_port_dict(port)
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def get_port_details(self, tenant_id, net_id, port_id):
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db.validate_port_ownership(tenant_id, net_id, port_id)
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port = db.port_get(port_id, net_id)
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return self._make_port_dict(port)
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def plug_interface(self, tenant_id, net_id, port_id, remote_iface_id):
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db.validate_port_ownership(tenant_id, net_id, port_id)
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db.port_set_attachment(port_id, net_id, remote_iface_id)
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def unplug_interface(self, tenant_id, net_id, port_id):
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db.validate_port_ownership(tenant_id, net_id, port_id)
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db.port_set_attachment(port_id, net_id, "")
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db.port_update(port_id, net_id, op_status=OperationalStatus.DOWN)
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def get_interface_details(self, tenant_id, net_id, port_id):
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db.validate_port_ownership(tenant_id, net_id, port_id)
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res = db.port_get(port_id, net_id)
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return res.interface_id
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