728 lines
29 KiB
Python
728 lines
29 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 Big Switch 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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#
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# @author: Mandeep Dhami, Big Switch Networks, Inc.
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# @author: Sumit Naiksatam, sumitnaiksatam@gmail.com, Big Switch Networks, Inc.
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"""
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Quantum REST Proxy Plug-in for Big Switch and FloodLight Controllers
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QuantumRestProxy provides a generic quantum plugin that translates all plugin
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function calls to equivalent authenticated REST calls to a set of redundant
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external network controllers. It also keeps persistent store for all quantum
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state to allow for re-sync of the external controller(s), if required.
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The local state on the plugin also allows for local response and fast-fail
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semantics where it can be determined based on the local persistent store.
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Network controller specific code is decoupled from this plugin and expected
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to reside on the controller itself (via the REST interface).
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This allows for:
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- independent authentication and redundancy schemes between quantum and the
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network controller
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- independent upgrade/development cycles between quantum and the controller
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as it limits the proxy code upgrade requirement to quantum release cycle
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and the controller specific code upgrade requirement to controller code
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- ability to sync the controller with quantum for independent recovery/reset
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External REST API used by proxy is the same API as defined for quantum (JSON
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subset) with some additional parameters (gateway on network-create and macaddr
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on port-attach) on an additional PUT to do a bulk dump of all persistent data.
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"""
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import base64
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import httplib
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import json
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import socket
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from quantum.common import exceptions
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from quantum.common import rpc as q_rpc
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from quantum.common import topics
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from quantum import context as qcontext
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from quantum.db import api as db
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from quantum.db import db_base_plugin_v2
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from quantum.db import dhcp_rpc_base
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from quantum.openstack.common import cfg
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from quantum.openstack.common import log as logging
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from quantum.openstack.common import rpc
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from quantum.plugins.bigswitch.version import version_string_with_vcs
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LOG = logging.getLogger(__name__)
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restproxy_opts = [
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cfg.StrOpt('servers', default='localhost:8800'),
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cfg.StrOpt('serverauth', default='username:password'),
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cfg.BoolOpt('serverssl', default=False),
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cfg.BoolOpt('syncdata', default=False),
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cfg.IntOpt('servertimeout', default=10),
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]
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cfg.CONF.register_opts(restproxy_opts, "RESTPROXY")
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# The following are used to invoke the API on the external controller
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NET_RESOURCE_PATH = "/tenants/%s/networks"
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PORT_RESOURCE_PATH = "/tenants/%s/networks/%s/ports"
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NETWORKS_PATH = "/tenants/%s/networks/%s"
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PORTS_PATH = "/tenants/%s/networks/%s/ports/%s"
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ATTACHMENT_PATH = "/tenants/%s/networks/%s/ports/%s/attachment"
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SUCCESS_CODES = range(200, 207)
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FAILURE_CODES = [0, 301, 302, 303, 400, 401, 403, 404, 500, 501, 502, 503,
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504, 505]
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SYNTAX_ERROR_MESSAGE = 'Syntax error in server config file, aborting plugin'
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class RemoteRestError(exceptions.QuantumException):
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def __init__(self, message):
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if message is None:
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message = "None"
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self.message = _("Error in REST call to remote network "
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"controller") + ": " + message
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super(RemoteRestError, self).__init__()
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class ServerProxy(object):
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"""REST server proxy to a network controller."""
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def __init__(self, server, port, ssl, auth, timeout, base_uri, name):
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self.server = server
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self.port = port
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self.ssl = ssl
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self.base_uri = base_uri
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self.timeout = timeout
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self.name = name
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self.success_codes = SUCCESS_CODES
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self.auth = None
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if auth:
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self.auth = 'Basic ' + base64.encodestring(auth).strip()
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def rest_call(self, action, resource, data, headers):
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uri = self.base_uri + resource
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body = json.dumps(data)
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if not headers:
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headers = {}
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headers['Content-type'] = 'application/json'
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headers['Accept'] = 'application/json'
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headers['QuantumProxy-Agent'] = self.name
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if self.auth:
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headers['Authorization'] = self.auth
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LOG.debug(_("ServerProxy: server=%(server)s, port=%(port)d, "
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"ssl=%(ssl)r, action=%(action)s"),
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{'server': self.server, 'port': self.port, 'ssl': self.ssl,
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'action': action})
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LOG.debug(_("ServerProxy: resource=%(resource)s, data=%(data)r, "
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"headers=%(headers)r"), locals())
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conn = None
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if self.ssl:
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conn = httplib.HTTPSConnection(
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self.server, self.port, timeout=self.timeout)
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if conn is None:
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LOG.error(_('ServerProxy: Could not establish HTTPS '
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'connection'))
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return 0, None, None, None
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else:
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conn = httplib.HTTPConnection(
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self.server, self.port, timeout=self.timeout)
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if conn is None:
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LOG.error(_('ServerProxy: Could not establish HTTP '
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'connection'))
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return 0, None, None, None
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try:
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conn.request(action, uri, body, headers)
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response = conn.getresponse()
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respstr = response.read()
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respdata = respstr
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if response.status in self.success_codes:
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try:
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respdata = json.loads(respstr)
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except ValueError:
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# response was not JSON, ignore the exception
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pass
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ret = (response.status, response.reason, respstr, respdata)
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except (socket.timeout, socket.error) as e:
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LOG.error(_('ServerProxy: %(action)s failure, %(e)r'), locals())
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ret = 0, None, None, None
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conn.close()
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LOG.debug(_("ServerProxy: status=%(status)d, reason=%(reason)r, "
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"ret=%(ret)s, data=%(data)r"), {'status': ret[0],
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'reason': ret[1],
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'ret': ret[2],
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'data': ret[3]})
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return ret
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class ServerPool(object):
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def __init__(self, servers, ssl, auth, timeout=10,
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base_uri='/quantum/v1.0', name='QuantumRestProxy'):
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self.base_uri = base_uri
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self.timeout = timeout
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self.name = name
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self.auth = auth
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self.ssl = ssl
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self.servers = []
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for server_port in servers:
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self.servers.append(self.server_proxy_for(*server_port))
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def server_proxy_for(self, server, port):
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return ServerProxy(server, port, self.ssl, self.auth, self.timeout,
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self.base_uri, self.name)
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def server_failure(self, resp):
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"""Define failure codes as required.
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Note: We assume 301-303 is a failure, and try the next server in
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the server pool.
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"""
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return resp[0] in FAILURE_CODES
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def action_success(self, resp):
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"""Defining success codes as required.
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Note: We assume any valid 2xx as being successful response.
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"""
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return resp[0] in SUCCESS_CODES
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def rest_call(self, action, resource, data, headers):
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failed_servers = []
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while self.servers:
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active_server = self.servers[0]
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ret = active_server.rest_call(action, resource, data, headers)
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if not self.server_failure(ret):
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self.servers.extend(failed_servers)
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return ret
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else:
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LOG.error(_('ServerProxy: %(action)s failure for servers: '
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'%(server)r'),
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{'action': action,
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'server': (active_server.server,
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active_server.port)})
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failed_servers.append(self.servers.pop(0))
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# All servers failed, reset server list and try again next time
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LOG.error(_('ServerProxy: %(action)s failure for all servers: '
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'%(server)r'),
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{'action': action,
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'server': tuple((s.server,
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s.port) for s in failed_servers)})
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self.servers.extend(failed_servers)
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return (0, None, None, None)
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def get(self, resource, data='', headers=None):
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return self.rest_call('GET', resource, data, headers)
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def put(self, resource, data, headers=None):
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return self.rest_call('PUT', resource, data, headers)
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def post(self, resource, data, headers=None):
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return self.rest_call('POST', resource, data, headers)
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def delete(self, resource, data='', headers=None):
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return self.rest_call('DELETE', resource, data, headers)
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class RpcProxy(dhcp_rpc_base.DhcpRpcCallbackMixin):
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RPC_API_VERSION = '1.0'
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def create_rpc_dispatcher(self):
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return q_rpc.PluginRpcDispatcher([self])
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class QuantumRestProxyV2(db_base_plugin_v2.QuantumDbPluginV2):
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def __init__(self):
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LOG.info(_('QuantumRestProxy: Starting plugin. Version=%s'),
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version_string_with_vcs())
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# init DB, proxy's persistent store defaults to in-memory sql-lite DB
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db.configure_db()
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# 'servers' is the list of network controller REST end-points
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# (used in order specified till one suceeds, and it is sticky
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# till next failure). Use 'serverauth' to encode api-key
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servers = cfg.CONF.RESTPROXY.servers
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serverauth = cfg.CONF.RESTPROXY.serverauth
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serverssl = cfg.CONF.RESTPROXY.serverssl
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syncdata = cfg.CONF.RESTPROXY.syncdata
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timeout = cfg.CONF.RESTPROXY.servertimeout
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# validate config
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assert servers is not None, 'Servers not defined. Aborting plugin'
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servers = tuple(s.rsplit(':', 1) for s in servers.split(','))
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servers = tuple((server, int(port)) for server, port in servers)
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assert all(len(s) == 2 for s in servers), SYNTAX_ERROR_MESSAGE
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# init network ctrl connections
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self.servers = ServerPool(servers, serverssl, serverauth,
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timeout)
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# init dhcp support
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self.topic = topics.PLUGIN
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self.conn = rpc.create_connection(new=True)
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self.callbacks = RpcProxy()
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self.dispatcher = self.callbacks.create_rpc_dispatcher()
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self.conn.create_consumer(self.topic, self.dispatcher,
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fanout=False)
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# Consume from all consumers in a thread
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self.conn.consume_in_thread()
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if syncdata:
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self._send_all_data()
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LOG.debug(_("QuantumRestProxyV2: initialization done"))
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def create_network(self, context, network):
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"""Create a network, which represents an L2 network segment which
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can have a set of subnets and ports associated with it.
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:param context: quantum api request context
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:param network: dictionary describing the network
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:returns: a sequence of mappings with the following signature:
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{
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"id": UUID representing the network.
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"name": Human-readable name identifying the network.
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"tenant_id": Owner of network. NOTE: only admin user can specify
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a tenant_id other than its own.
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"admin_state_up": Sets admin state of network.
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if down, network does not forward packets.
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"status": Indicates whether network is currently operational
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(values are "ACTIVE", "DOWN", "BUILD", and "ERROR")
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"subnets": Subnets associated with this network.
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}
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:raises: RemoteRestError
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"""
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LOG.debug(_("QuantumRestProxyV2: create_network() called"))
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# Validate args
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tenant_id = self._get_tenant_id_for_create(context, network["network"])
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net_name = network["network"]["name"]
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if network["network"]["admin_state_up"] is False:
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LOG.warning(_("Network with admin_state_up=False are not yet "
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"supported by this plugin. Ignoring setting for "
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"network %s"), net_name)
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# create in DB
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new_net = super(QuantumRestProxyV2, self).create_network(context,
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network)
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# create on networl ctrl
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try:
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resource = NET_RESOURCE_PATH % tenant_id
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data = {
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"network": {
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"id": new_net["id"],
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"name": new_net["name"],
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}
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}
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ret = self.servers.post(resource, data)
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if not self.servers.action_success(ret):
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raise RemoteRestError(ret[2])
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except RemoteRestError as e:
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LOG.error(_("QuantumRestProxyV2:Unable to create remote "
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"network: %s"), e.message)
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super(QuantumRestProxyV2, self).delete_network(context,
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new_net['id'])
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raise
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# return created network
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return new_net
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def update_network(self, context, net_id, network):
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"""Updates the properties of a particular Virtual Network.
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:param context: quantum api request context
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:param net_id: uuid of the network to update
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:param network: dictionary describing the updates
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:returns: a sequence of mappings with the following signature:
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{
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"id": UUID representing the network.
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"name": Human-readable name identifying the network.
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"tenant_id": Owner of network. NOTE: only admin user can
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specify a tenant_id other than its own.
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"admin_state_up": Sets admin state of network.
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if down, network does not forward packets.
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"status": Indicates whether network is currently operational
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(values are "ACTIVE", "DOWN", "BUILD", and "ERROR")
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"subnets": Subnets associated with this network.
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}
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:raises: exceptions.NetworkNotFound
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:raises: RemoteRestError
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"""
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LOG.debug(_("QuantumRestProxyV2.update_network() called"))
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# Validate Args
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if network["network"].get("admin_state_up"):
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if network["network"]["admin_state_up"] is False:
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LOG.warning(_("Network with admin_state_up=False are not yet "
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"supported by this plugin. Ignoring setting for "
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"network %s", net_name))
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# update DB
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orig_net = super(QuantumRestProxyV2, self).get_network(context, net_id)
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tenant_id = orig_net["tenant_id"]
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new_net = super(QuantumRestProxyV2, self).update_network(
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context, net_id, network)
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# update network on network controller
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if new_net["name"] != orig_net["name"]:
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try:
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resource = NETWORKS_PATH % (tenant_id, net_id)
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data = {
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"network": new_net,
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}
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ret = self.servers.put(resource, data)
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if not self.servers.action_success(ret):
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raise RemoteRestError(ret[2])
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except RemoteRestError as e:
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LOG.error(_("QuantumRestProxyV2: Unable to update remote "
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"network: %s"), e.message)
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# reset network to original state
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super(QuantumRestProxyV2, self).update_network(
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context, id, orig_net)
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raise
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# return updated network
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return new_net
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def delete_network(self, context, net_id):
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"""Delete a network.
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:param context: quantum api request context
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:param id: UUID representing the network to delete.
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:returns: None
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:raises: exceptions.NetworkInUse
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:raises: exceptions.NetworkNotFound
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:raises: RemoteRestError
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"""
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LOG.debug(_("QuantumRestProxyV2: delete_network() called"))
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# Validate args
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orig_net = super(QuantumRestProxyV2, self).get_network(context, net_id)
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tenant_id = orig_net["tenant_id"]
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# delete from network ctrl. Remote error on delete is ignored
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try:
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resource = NETWORKS_PATH % (tenant_id, net_id)
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ret = self.servers.delete(resource)
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if not self.servers.action_success(ret):
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raise RemoteRestError(ret[2])
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ret_val = super(QuantumRestProxyV2, self).delete_network(context,
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net_id)
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return ret_val
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except RemoteRestError as e:
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LOG.error(_("QuantumRestProxyV2: Unable to update remote "
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"network: %s"), e.message)
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def create_port(self, context, port):
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"""Create a port, which is a connection point of a device
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(e.g., a VM NIC) to attach to a L2 Quantum network.
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:param context: quantum api request context
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:param port: dictionary describing the port
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:returns:
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{
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"id": uuid represeting the port.
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"network_id": uuid of network.
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"tenant_id": tenant_id
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"mac_address": mac address to use on this port.
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"admin_state_up": Sets admin state of port. if down, port
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does not forward packets.
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"status": dicates whether port is currently operational
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(limit values to "ACTIVE", "DOWN", "BUILD", and "ERROR")
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"fixed_ips": list of subnet ID"s and IP addresses to be used on
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this port
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"device_id": identifies the device (e.g., virtual server) using
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this port.
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}
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:raises: exceptions.NetworkNotFound
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:raises: exceptions.StateInvalid
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:raises: RemoteRestError
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"""
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LOG.debug(_("QuantumRestProxyV2: create_port() called"))
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# Update DB
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port["port"]["admin_state_up"] = False
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new_port = super(QuantumRestProxyV2, self).create_port(context, port)
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net = super(QuantumRestProxyV2,
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self).get_network(context, new_port["network_id"])
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# create on networl ctrl
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try:
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resource = PORT_RESOURCE_PATH % (net["tenant_id"], net["id"])
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data = {
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"port": {
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"id": new_port["id"],
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"state": "ACTIVE",
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}
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}
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ret = self.servers.post(resource, data)
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if not self.servers.action_success(ret):
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raise RemoteRestError(ret[2])
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# connect device to network, if present
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if port["port"].get("device_id"):
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self._plug_interface(context,
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net["tenant_id"], net["id"],
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new_port["id"], new_port["id"] + "00")
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except RemoteRestError as e:
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LOG.error(_("QuantumRestProxyV2: Unable to create remote port: "
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"%s"), e.message)
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super(QuantumRestProxyV2, self).delete_port(context,
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new_port["id"])
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raise
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# Set port state up and return that port
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port_update = {"port": {"admin_state_up": True}}
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return super(QuantumRestProxyV2, self).update_port(context,
|
|
new_port["id"],
|
|
port_update)
|
|
|
|
def update_port(self, context, port_id, port):
|
|
"""Update values of a port.
|
|
:param context: quantum api request context
|
|
:param id: UUID representing the port to update.
|
|
:param port: dictionary with keys indicating fields to update.
|
|
|
|
:returns: a mapping sequence with the following signature:
|
|
{
|
|
"id": uuid represeting the port.
|
|
"network_id": uuid of network.
|
|
"tenant_id": tenant_id
|
|
"mac_address": mac address to use on this port.
|
|
"admin_state_up": sets admin state of port. if down, port
|
|
does not forward packets.
|
|
"status": dicates whether port is currently operational
|
|
(limit values to "ACTIVE", "DOWN", "BUILD", and "ERROR")
|
|
"fixed_ips": list of subnet ID's and IP addresses to be used on
|
|
this port
|
|
"device_id": identifies the device (e.g., virtual server) using
|
|
this port.
|
|
}
|
|
|
|
:raises: exceptions.StateInvalid
|
|
:raises: exceptions.PortNotFound
|
|
:raises: RemoteRestError
|
|
"""
|
|
LOG.debug(_("QuantumRestProxyV2: update_port() called"))
|
|
|
|
# Validate Args
|
|
orig_port = super(QuantumRestProxyV2, self).get_port(context, port_id)
|
|
|
|
# Update DB
|
|
new_port = super(QuantumRestProxyV2, self).update_port(context,
|
|
port_id, port)
|
|
|
|
# update on networl ctrl
|
|
try:
|
|
resource = PORTS_PATH % (orig_port["tenant_id"],
|
|
orig_port["network_id"], port_id)
|
|
data = {"port": new_port, }
|
|
ret = self.servers.put(resource, data)
|
|
if not self.servers.action_success(ret):
|
|
raise RemoteRestError(ret[2])
|
|
|
|
if new_port.get("device_id") != orig_port.get("device_id"):
|
|
if orig_port.get("device_id"):
|
|
self._unplug_interface(context, orig_port["tenant_id"],
|
|
orig_port["network_id"],
|
|
orig_port["id"])
|
|
if new_port.get("device_id"):
|
|
self._plug_interface(context, new_port["tenant_id"],
|
|
new_port["network_id"],
|
|
new_port["id"], new_port["id"] + "00")
|
|
|
|
except RemoteRestError as e:
|
|
LOG.error(_("QuantumRestProxyV2: Unable to create remote port: "
|
|
"%s"), e.message)
|
|
# reset port to original state
|
|
super(QuantumRestProxyV2, self).update_port(context, port_id,
|
|
orig_port)
|
|
raise
|
|
|
|
# return new_port
|
|
return new_port
|
|
|
|
def delete_port(self, context, port_id):
|
|
"""Delete a port.
|
|
:param context: quantum api request context
|
|
:param id: UUID representing the port to delete.
|
|
|
|
:raises: exceptions.PortInUse
|
|
:raises: exceptions.PortNotFound
|
|
:raises: exceptions.NetworkNotFound
|
|
:raises: RemoteRestError
|
|
"""
|
|
|
|
LOG.debug(_("QuantumRestProxyV2: delete_port() called"))
|
|
|
|
# Delete from DB
|
|
port = super(QuantumRestProxyV2, self).get_port(context, port_id)
|
|
|
|
# delete from network ctrl. Remote error on delete is ignored
|
|
try:
|
|
resource = PORTS_PATH % (port["tenant_id"], port["network_id"],
|
|
port_id)
|
|
ret = self.servers.delete(resource)
|
|
if not self.servers.action_success(ret):
|
|
raise RemoteRestError(ret[2])
|
|
|
|
if port.get("device_id"):
|
|
self._unplug_interface(context, port["tenant_id"],
|
|
port["network_id"], port["id"])
|
|
ret_val = super(QuantumRestProxyV2, self).delete_port(context,
|
|
port_id)
|
|
return ret_val
|
|
except RemoteRestError as e:
|
|
LOG.error(_("QuantumRestProxyV2: Unable to update remote port: "
|
|
"%s"), e.message)
|
|
|
|
def _plug_interface(self, context, tenant_id, net_id, port_id,
|
|
remote_interface_id):
|
|
"""Attaches a remote interface to the specified port on the
|
|
specified Virtual Network.
|
|
|
|
:returns: None
|
|
|
|
:raises: exceptions.NetworkNotFound
|
|
:raises: exceptions.PortNotFound
|
|
:raises: RemoteRestError
|
|
"""
|
|
LOG.debug(_("QuantumRestProxyV2: _plug_interface() called"))
|
|
|
|
# update attachment on network controller
|
|
try:
|
|
port = super(QuantumRestProxyV2, self).get_port(context, port_id)
|
|
mac = port["mac_address"]
|
|
|
|
for ip in port["fixed_ips"]:
|
|
if ip.get("subnet_id") is not None:
|
|
subnet = super(QuantumRestProxyV2, self).get_subnet(
|
|
context, ip["subnet_id"])
|
|
gateway = subnet.get("gateway_ip")
|
|
if gateway is not None:
|
|
resource = NETWORKS_PATH % (tenant_id, net_id)
|
|
data = {"network":
|
|
{"id": net_id,
|
|
"gateway": gateway,
|
|
}
|
|
}
|
|
ret = self.servers.put(resource, data)
|
|
if not self.servers.action_success(ret):
|
|
raise RemoteRestError(ret[2])
|
|
|
|
if mac is not None:
|
|
resource = ATTACHMENT_PATH % (tenant_id, net_id, port_id)
|
|
data = {"attachment":
|
|
{"id": remote_interface_id,
|
|
"mac": mac,
|
|
}
|
|
}
|
|
ret = self.servers.put(resource, data)
|
|
if not self.servers.action_success(ret):
|
|
raise RemoteRestError(ret[2])
|
|
except RemoteRestError as e:
|
|
LOG.error(_("QuantumRestProxyV2:Unable to update remote network: "
|
|
"%s"), e.message)
|
|
raise
|
|
|
|
def _unplug_interface(self, context, tenant_id, net_id, port_id):
|
|
"""Detaches a remote interface from the specified port on the
|
|
network controller
|
|
|
|
:returns: None
|
|
|
|
:raises: RemoteRestError
|
|
"""
|
|
LOG.debug(_("QuantumRestProxyV2: _unplug_interface() called"))
|
|
|
|
# delete from network ctrl. Remote error on delete is ignored
|
|
try:
|
|
resource = ATTACHMENT_PATH % (tenant_id, net_id, port_id)
|
|
ret = self.servers.delete(resource)
|
|
if not self.servers.action_success(ret):
|
|
raise RemoteRestError(ret[2])
|
|
except RemoteRestError as e:
|
|
LOG.error(_("QuantumRestProxyV2: Unable to update remote port: "
|
|
"%s"), e.message)
|
|
|
|
def _send_all_data(self):
|
|
"""Pushes all data to network ctrl (networks/ports, ports/attachments)
|
|
to give the controller an option to re-sync it's persistent store
|
|
with quantum's current view of that data.
|
|
"""
|
|
admin_context = qcontext.get_admin_context()
|
|
networks = {}
|
|
ports = {}
|
|
|
|
all_networks = super(QuantumRestProxyV2,
|
|
self).get_networks(admin_context) or []
|
|
for net in all_networks:
|
|
networks[net.get('id')] = {
|
|
'id': net.get('id'),
|
|
'name': net.get('name'),
|
|
'op-status': net.get('admin_state_up'),
|
|
}
|
|
|
|
subnets = net.get('subnets', [])
|
|
for subnet_id in subnets:
|
|
subnet = self.get_subnet(admin_context, subnet_id)
|
|
gateway_ip = subnet.get('gateway_ip')
|
|
if gateway_ip:
|
|
# FIX: For backward compatibility with wire protocol
|
|
networks[net.get('id')]['gateway'] = gateway_ip
|
|
|
|
ports = []
|
|
net_filter = {'network_id': [net.get('id')]}
|
|
net_ports = super(QuantumRestProxyV2,
|
|
self).get_ports(admin_context,
|
|
filters=net_filter) or []
|
|
for port in net_ports:
|
|
port_details = {
|
|
'id': port.get('id'),
|
|
'attachment': {
|
|
'id': port.get('id') + '00',
|
|
'mac': port.get('mac_address'),
|
|
},
|
|
'state': port.get('status'),
|
|
'op-status': port.get('admin_state_up'),
|
|
'mac': None
|
|
}
|
|
ports.append(port_details)
|
|
networks[net.get('id')]['ports'] = ports
|
|
try:
|
|
resource = '/topology'
|
|
data = {
|
|
'networks': networks,
|
|
}
|
|
ret = self.servers.put(resource, data)
|
|
if not self.servers.action_success(ret):
|
|
raise RemoteRestError(ret[2])
|
|
return ret
|
|
except RemoteRestError as e:
|
|
LOG.error(_('QuantumRestProxy: Unable to update remote network: '
|
|
'%s'), e.message)
|
|
raise
|