--- /dev/null
+
+# We keep a copy of the old introducer (both client and server) here to
+# support compatibility tests. The old client is supposed to handle the new
+# server, and new client is supposed to handle the old server.
+
+import re, time, sha
+from base64 import b32decode
+from zope.interface import implements
+from twisted.application import service
+from foolscap import Referenceable
+from allmydata.interfaces import RIIntroducerSubscriberClient, IIntroducerClient
+from allmydata.util import log, idlib
+from allmydata.introducer.common import make_index
+
+from allmydata.interfaces import RIIntroducerPublisherAndSubscriberService
+
+class RemoteServiceConnector:
+ """I hold information about a peer service that we want to connect to. If
+ we are connected, I hold the RemoteReference, the peer's address, and the
+ peer's version information. I remember information about when we were
+ last connected to the peer too, even if we aren't currently connected.
+
+ @ivar announcement_time: when we first heard about this service
+ @ivar last_connect_time: when we last established a connection
+ @ivar last_loss_time: when we last lost a connection
+
+ @ivar version: the peer's version, from the most recent announcement
+ @ivar oldest_supported: the peer's oldest supported version, same
+ @ivar nickname: the peer's self-reported nickname, same
+
+ @ivar rref: the RemoteReference, if connected, otherwise None
+ @ivar remote_host: the IAddress, if connected, otherwise None
+ """
+
+ def __init__(self, announcement, tub, ic):
+ self._tub = tub
+ self._announcement = announcement
+ self._ic = ic
+ (furl, service_name, ri_name, nickname, ver, oldest) = announcement
+
+ self._furl = furl
+ m = re.match(r'pb://(\w+)@', furl)
+ assert m
+ self._nodeid = b32decode(m.group(1).upper())
+ self._nodeid_s = idlib.shortnodeid_b2a(self._nodeid)
+
+ self.service_name = service_name
+
+ self.log("attempting to connect to %s" % self._nodeid_s)
+ self.announcement_time = time.time()
+ self.last_loss_time = None
+ self.rref = None
+ self.remote_host = None
+ self.last_connect_time = None
+ self.version = ver
+ self.oldest_supported = oldest
+ self.nickname = nickname
+
+ def log(self, *args, **kwargs):
+ return self._ic.log(*args, **kwargs)
+
+ def startConnecting(self):
+ self._reconnector = self._tub.connectTo(self._furl, self._got_service)
+
+ def stopConnecting(self):
+ self._reconnector.stopConnecting()
+
+ def _got_service(self, rref):
+ self.last_connect_time = time.time()
+ self.remote_host = rref.tracker.broker.transport.getPeer()
+
+ self.rref = rref
+ self.log("connected to %s" % self._nodeid_s)
+
+ self._ic.add_connection(self._nodeid, self.service_name, rref)
+
+ rref.notifyOnDisconnect(self._lost, rref)
+
+ def _lost(self, rref):
+ self.log("lost connection to %s" % self._nodeid_s)
+ self.last_loss_time = time.time()
+ self.rref = None
+ self.remote_host = None
+ self._ic.remove_connection(self._nodeid, self.service_name, rref)
+
+ def reset(self):
+ self._reconnector.reset()
+
+
+class IntroducerClient_V1(service.Service, Referenceable):
+ implements(RIIntroducerSubscriberClient, IIntroducerClient)
+
+ def __init__(self, tub, introducer_furl,
+ nickname, my_version, oldest_supported):
+ self._tub = tub
+ self.introducer_furl = introducer_furl
+
+ self._nickname = nickname
+ self._my_version = my_version
+ self._oldest_supported = oldest_supported
+
+ self._published_announcements = set()
+
+ self._publisher = None
+ self._connected = False
+
+ self._subscribed_service_names = set()
+ self._subscriptions = set() # requests we've actually sent
+ self._received_announcements = set()
+ # TODO: this set will grow without bound, until the node is restarted
+
+ # we only accept one announcement per (peerid+service_name) pair.
+ # This insures that an upgraded host replace their previous
+ # announcement. It also means that each peer must have their own Tub
+ # (no sharing), which is slightly weird but consistent with the rest
+ # of the Tahoe codebase.
+ self._connectors = {} # k: (peerid+svcname), v: RemoteServiceConnector
+ # self._connections is a set of (peerid, service_name, rref) tuples
+ self._connections = set()
+
+ self.counter = 0 # incremented each time we change state, for tests
+ self.encoding_parameters = None
+
+ def startService(self):
+ service.Service.startService(self)
+ rc = self._tub.connectTo(self.introducer_furl, self._got_introducer)
+ self._introducer_reconnector = rc
+ def connect_failed(failure):
+ self.log("Initial Introducer connection failed: perhaps it's down",
+ level=log.WEIRD, failure=failure)
+ d = self._tub.getReference(self.introducer_furl)
+ d.addErrback(connect_failed)
+
+ def _got_introducer(self, publisher):
+ self.log("connected to introducer")
+ self._connected = True
+ self._publisher = publisher
+ publisher.notifyOnDisconnect(self._disconnected)
+ self._maybe_publish()
+ self._maybe_subscribe()
+
+ def _disconnected(self):
+ self.log("bummer, we've lost our connection to the introducer")
+ self._connected = False
+ self._publisher = None
+ self._subscriptions.clear()
+
+ def stopService(self):
+ service.Service.stopService(self)
+ self._introducer_reconnector.stopConnecting()
+ for rsc in self._connectors.itervalues():
+ rsc.stopConnecting()
+
+ def log(self, *args, **kwargs):
+ if "facility" not in kwargs:
+ kwargs["facility"] = "tahoe.introducer"
+ return log.msg(*args, **kwargs)
+
+
+ def publish(self, furl, service_name, remoteinterface_name):
+ ann = (furl, service_name, remoteinterface_name,
+ self._nickname, self._my_version, self._oldest_supported)
+ self._published_announcements.add(ann)
+ self._maybe_publish()
+
+ def subscribe_to(self, service_name):
+ self._subscribed_service_names.add(service_name)
+ self._maybe_subscribe()
+
+ def _maybe_subscribe(self):
+ if not self._publisher:
+ self.log("want to subscribe, but no introducer yet",
+ level=log.NOISY)
+ return
+ for service_name in self._subscribed_service_names:
+ if service_name not in self._subscriptions:
+ # there is a race here, but the subscription desk ignores
+ # duplicate requests.
+ self._subscriptions.add(service_name)
+ d = self._publisher.callRemote("subscribe", self, service_name)
+ d.addErrback(log.err, facility="tahoe.introducer",
+ level=log.WEIRD)
+
+ def _maybe_publish(self):
+ if not self._publisher:
+ self.log("want to publish, but no introducer yet", level=log.NOISY)
+ return
+ # this re-publishes everything. The Introducer ignores duplicates
+ for ann in self._published_announcements:
+ d = self._publisher.callRemote("publish", ann)
+ d.addErrback(log.err, facility="tahoe.introducer",
+ level=log.WEIRD)
+
+
+
+ def remote_announce(self, announcements):
+ for ann in announcements:
+ self.log("received %d announcements" % len(announcements))
+ (furl, service_name, ri_name, nickname, ver, oldest) = ann
+ if service_name not in self._subscribed_service_names:
+ self.log("announcement for a service we don't care about [%s]"
+ % (service_name,), level=log.WEIRD)
+ continue
+ if ann in self._received_announcements:
+ self.log("ignoring old announcement: %s" % (ann,),
+ level=log.NOISY)
+ continue
+ self.log("new announcement[%s]: %s" % (service_name, ann))
+ self._received_announcements.add(ann)
+ self._new_announcement(ann)
+
+ def _new_announcement(self, announcement):
+ # this will only be called for new announcements
+ index = make_index(announcement)
+ if index in self._connectors:
+ self.log("replacing earlier announcement", level=log.NOISY)
+ self._connectors[index].stopConnecting()
+ rsc = RemoteServiceConnector(announcement, self._tub, self)
+ self._connectors[index] = rsc
+ rsc.startConnecting()
+
+ def add_connection(self, nodeid, service_name, rref):
+ self._connections.add( (nodeid, service_name, rref) )
+ self.counter += 1
+ # when one connection is established, reset the timers on all others,
+ # to trigger a reconnection attempt in one second. This is intended
+ # to accelerate server connections when we've been offline for a
+ # while. The goal is to avoid hanging out for a long time with
+ # connections to only a subset of the servers, which would increase
+ # the chances that we'll put shares in weird places (and not update
+ # existing shares of mutable files). See #374 for more details.
+ for rsc in self._connectors.values():
+ rsc.reset()
+
+ def remove_connection(self, nodeid, service_name, rref):
+ self._connections.discard( (nodeid, service_name, rref) )
+ self.counter += 1
+
+
+ def get_all_connections(self):
+ return frozenset(self._connections)
+
+ def get_all_connectors(self):
+ return self._connectors.copy()
+
+ def get_all_peerids(self):
+ return frozenset([peerid
+ for (peerid, service_name, rref)
+ in self._connections])
+
+ def get_all_connections_for(self, service_name):
+ return frozenset([c
+ for c in self._connections
+ if c[1] == service_name])
+
+ def get_permuted_peers(self, service_name, key):
+ """Return an ordered list of (peerid, rref) tuples."""
+
+ results = []
+ for (c_peerid, c_service_name, rref) in self._connections:
+ assert isinstance(c_peerid, str)
+ if c_service_name != service_name:
+ continue
+ permuted = sha.new(key + c_peerid).digest()
+ results.append((permuted, c_peerid, rref))
+
+ results.sort(lambda a,b: cmp(a[0], b[0]))
+ return [ (r[1], r[2]) for r in results ]
+
+
+
+ def remote_set_encoding_parameters(self, parameters):
+ self.encoding_parameters = parameters
+
+ def connected_to_introducer(self):
+ return self._connected
+
+ def debug_disconnect_from_peerid(self, victim_nodeid):
+ # for unit tests: locate and sever all connections to the given
+ # peerid.
+ for (nodeid, service_name, rref) in self._connections:
+ if nodeid == victim_nodeid:
+ rref.tracker.broker.transport.loseConnection()
+
+
+class IntroducerService_V1(service.MultiService, Referenceable):
+ implements(RIIntroducerPublisherAndSubscriberService)
+ name = "introducer"
+
+ def __init__(self, basedir="."):
+ service.MultiService.__init__(self)
+ self.introducer_url = None
+ # 'index' is (tubid, service_name)
+ self._announcements = {} # dict of index -> (announcement, timestamp)
+ self._subscribers = {} # dict of (rref->timestamp) dicts
+
+ def log(self, *args, **kwargs):
+ if "facility" not in kwargs:
+ kwargs["facility"] = "tahoe.introducer"
+ return log.msg(*args, **kwargs)
+
+ def get_announcements(self):
+ return self._announcements
+ def get_subscribers(self):
+ return self._subscribers
+
+ def remote_publish(self, announcement):
+ self.log("introducer: announcement published: %s" % (announcement,) )
+ index = make_index(announcement)
+ if index in self._announcements:
+ (old_announcement, timestamp) = self._announcements[index]
+ if old_announcement == announcement:
+ self.log("but we already knew it, ignoring", level=log.NOISY)
+ return
+ else:
+ self.log("old announcement being updated", level=log.NOISY)
+ self._announcements[index] = (announcement, time.time())
+ (furl, service_name, ri_name, nickname, ver, oldest) = announcement
+ for s in self._subscribers.get(service_name, []):
+ s.callRemote("announce", set([announcement]))
+
+ def remote_subscribe(self, subscriber, service_name):
+ self.log("introducer: subscription[%s] request at %s" % (service_name,
+ subscriber))
+ if service_name not in self._subscribers:
+ self._subscribers[service_name] = {}
+ subscribers = self._subscribers[service_name]
+ if subscriber in subscribers:
+ self.log("but they're already subscribed, ignoring",
+ level=log.UNUSUAL)
+ return
+ subscribers[subscriber] = time.time()
+ def _remove():
+ self.log("introducer: unsubscribing[%s] %s" % (service_name,
+ subscriber))
+ subscribers.pop(subscriber, None)
+ subscriber.notifyOnDisconnect(_remove)
+
+ announcements = set( [ ann
+ for idx,(ann,when) in self._announcements.items()
+ if idx[1] == service_name] )
+ d = subscriber.callRemote("announce", announcements)
+ d.addErrback(log.err, facility="tahoe.introducer", level=log.UNUSUAL)
from allmydata.introducer.server import IntroducerService
# test compatibility with old introducer .tac files
from allmydata.introducer import IntroducerNode
+from allmydata.introducer import old
from allmydata.util import testutil, idlib
class FakeNode(Referenceable):
def log(self, msg, **kw):
log.msg(msg, **kw)
-class TestIntroducerNode(testutil.SignalMixin, unittest.TestCase):
+class Node(testutil.SignalMixin, unittest.TestCase):
def test_loadable(self):
basedir = "introducer.IntroducerNode.test_loadable"
os.mkdir(basedir)
d.addCallback(flushEventualQueue)
return d
-class TestIntroducer(unittest.TestCase, testutil.PollMixin):
+class ServiceMixin:
def setUp(self):
self.parent = LoggingMultiService()
self.parent.startService()
d.addCallback(flushEventualQueue)
return d
+class Introducer(ServiceMixin, unittest.TestCase, testutil.PollMixin):
def test_create(self):
ic = IntroducerClient(None, "introducer.furl", "my_nickname",
self.failUnlessEqual(len(i.get_announcements()), 2)
self.failUnlessEqual(len(i.get_subscribers()), 0)
+class SystemTestMixin(ServiceMixin, testutil.PollMixin):
- def test_system(self):
-
+ def setUp(self):
+ ServiceMixin.setUp(self)
self.central_tub = tub = Tub()
#tub.setOption("logLocalFailures", True)
#tub.setOption("logRemoteFailures", True)
portnum = l.getPortnum()
tub.setLocation("localhost:%d" % portnum)
+class SystemTest(SystemTestMixin, unittest.TestCase):
+
+ def test_system(self):
i = IntroducerService()
i.setServiceParent(self.parent)
- introducer_furl = tub.registerReference(i)
+ self.introducer_furl = self.central_tub.registerReference(i)
+ return self.do_system_test()
+
+ def test_system_oldserver(self):
+ i = old.IntroducerService_V1()
+ i.setServiceParent(self.parent)
+ self.introducer_furl = self.central_tub.registerReference(i)
+ return self.do_system_test()
+
+ def do_system_test(self):
+
NUMCLIENTS = 5
- # we have 5 clients who publish themselves, and an extra one which
- # does not. When the connections are fully established, all six nodes
+ # we have 5 clients who publish themselves, and an extra one does
+ # which not. When the connections are fully established, all six nodes
# should have 5 connections each.
clients = []
n = FakeNode()
log.msg("creating client %d: %s" % (i, tub.getShortTubID()))
- c = IntroducerClient(tub, introducer_furl,
- "nickname-%d" % i, "version", "oldest")
+ client_class = IntroducerClient
+ if i == 0:
+ client_class = old.IntroducerClient_V1
+ c = client_class(tub, self.introducer_furl,
+ "nickname-%d" % i, "version", "oldest")
if i < NUMCLIENTS:
node_furl = tub.registerReference(n)
c.publish(node_furl, "storage", "ri_name")
self.failIf(c.connected_to_introducer())
d.addCallback(_check4)
return d
-
projects / tahoe-lafs / tahoe-lafs.git / commitdiff