def getNodes(api, num, **constraints):
# Now do the backtracking search for a suitable solution
# First with existing slice nodes
reqs = []
nodes = []
import node as Node
for i in xrange(num):
node = Node.Node(api)
node.min_num_external_interface = 1
nodes.append(node)
node = nodes[0]
candidates = filterBlacklist(node.find_candidates())
reqs = [candidates] * num
def pickbest(fullset, nreq, node=nodes[0]):
if len(fullset) > nreq:
fullset = zip(node.rate_nodes(fullset), fullset)
fullset.sort(reverse=True)
del fullset[nreq:]
return set(map(operator.itemgetter(1), fullset))
else:
return fullset
solution = resourcealloc.alloc(reqs, sample=pickbest)
# Do assign nodes
runner = ParallelRun(maxthreads=4)
for node, node_id in zip(nodes, solution):
runner.put(node.assign_node_id, node_id)
runner.join()
return nodes
def getNodes(api, num, **constraints):
# Now do the backtracking search for a suitable solution
# First with existing slice nodes
reqs = []
nodes = []
import node as Node
for i in xrange(num):
node = Node.Node(api)
node.min_num_external_interface = 1
nodes.append(node)
node = nodes[0]
candidates = filterBlacklist(node.find_candidates())
reqs = [candidates] * num
def pickbest(fullset, nreq, node=nodes[0]):
if len(fullset) > nreq:
fullset = zip(node.rate_nodes(fullset),fullset)
fullset.sort(reverse=True)
del fullset[nreq:]
return set(map(operator.itemgetter(1),fullset))
else:
return fullset
solution = resourcealloc.alloc(reqs, sample=pickbest)
# Do assign nodes
runner = ParallelRun(maxthreads=4)
for node, node_id in zip(nodes, solution):
runner.put(node.assign_node_id, node_id)
runner.join()
return nodes
def do_wait_nodes(self):
for guid, node in self._elements.iteritems():
if isinstance(node, self._node.Node):
# Just inject configuration stuff
node.home_path = "nepi-node-%s" % (guid,)
node.ident_path = self.sliceSSHKey
node.slicename = self.slicename
# Show the magic
self._logger.info("PlanetLab Node %s configured at %s", guid, node.hostname)
try:
runner = ParallelRun(maxthreads=64, maxqueue=1)
abort = []
def waitforit(guid, node):
try:
node.wait_provisioning(
(20*60 if node._node_id in self._just_provisioned else 60)
)
self._logger.info("READY Node %s at %s", guid, node.hostname)
# Prepare dependency installer now
node.prepare_dependencies()
except:
abort.append(None)
raise
for guid, node in self._elements.iteritems():
if abort:
break
if isinstance(node, self._node.Node):
self._logger.info("Waiting for Node %s configured at %s", guid, node.hostname)
runner.put(waitforit, guid, node)
runner.join()
except self._node.UnresponsiveNodeError:
# Uh...
self._logger.warn("UNRESPONSIVE Nodes")
# Mark all dead nodes (which are unresponsive) on the blacklist
# and re-raise
for guid, node in self._elements.iteritems():
if isinstance(node, self._node.Node):
if not node.is_alive():
self._logger.warn("Blacklisting %s for unresponsiveness", node.hostname)
self._blacklist.add(node.hostname)
node.unassign_node()
try:
self._save_blacklist()
except:
# not important...
import traceback
traceback.print_exc()
raise
def _do_in_factory_order(self, action, order, postaction = None, poststep = None):
logger = self._logger
guids = collections.defaultdict(list)
# order guids (elements) according to factory_id
for guid, factory_id in self._create.iteritems():
guids[factory_id].append(guid)
# configure elements following the factory_id order
for factory_id in order:
# Create a parallel runner if we're given a Parallel() wrapper
runner = None
if isinstance(factory_id, Parallel):
runner = ParallelRun(factory_id.maxthreads)
factory_id = factory_id.factory
# omit the factories that have no element to create
if factory_id not in guids:
continue
# configure action
factory = self._factories[factory_id]
if isinstance(action, basestring) and not getattr(factory, action):
continue
def perform_action(guid):
if isinstance(action, basestring):
getattr(factory, action)(self, guid)
else:
action(self, guid)
if postaction:
postaction(self, guid)
# perform the action on all elements, in parallel if so requested
if runner:
logger.debug("TestbedController: Starting parallel %s", action)
runner.start()
for guid in guids[factory_id]:
if runner:
logger.debug("TestbedController: Scheduling %s on %s", action, guid)
runner.put(perform_action, guid)
else:
logger.debug("TestbedController: Performing %s on %s", action, guid)
perform_action(guid)
# sync
if runner:
runner.sync()
# post hook
if poststep:
for guid in guids[factory_id]:
if runner:
logger.debug("TestbedController: Scheduling post-%s on %s", action, guid)
runner.put(poststep, self, guid)
else:
logger.debug("TestbedController: Performing post-%s on %s", action, guid)
poststep(self, guid)
# sync
if runner:
runner.join()
logger.debug("TestbedController: Finished parallel %s", action)
def _do_in_factory_order(self,
action,
order,
postaction=None,
poststep=None):
logger = self._logger
guids = collections.defaultdict(list)
# order guids (elements) according to factory_id
for guid, factory_id in self._create.iteritems():
guids[factory_id].append(guid)
# configure elements following the factory_id order
for factory_id in order:
# Create a parallel runner if we're given a Parallel() wrapper
runner = None
if isinstance(factory_id, Parallel):
runner = ParallelRun(factory_id.maxthreads)
factory_id = factory_id.factory
# omit the factories that have no element to create
if factory_id not in guids:
continue
# configure action
factory = self._factories[factory_id]
if isinstance(action, basestring) and not getattr(factory, action):
continue
def perform_action(guid):
if isinstance(action, basestring):
getattr(factory, action)(self, guid)
else:
action(self, guid)
if postaction:
postaction(self, guid)
# perform the action on all elements, in parallel if so requested
if runner:
logger.debug("TestbedController: Starting parallel %s", action)
runner.start()
for guid in guids[factory_id]:
if runner:
logger.debug("TestbedController: Scheduling %s on %s",
action, guid)
runner.put(perform_action, guid)
else:
logger.debug("TestbedController: Performing %s on %s",
action, guid)
perform_action(guid)
# sync
if runner:
runner.sync()
# post hook
if poststep:
for guid in guids[factory_id]:
if runner:
logger.debug(
"TestbedController: Scheduling post-%s on %s",
action, guid)
runner.put(poststep, self, guid)
else:
logger.debug(
"TestbedController: Performing post-%s on %s",
action, guid)
poststep(self, guid)
# sync
if runner:
runner.join()
logger.debug("TestbedController: Finished parallel %s", action)
def do_resource_discovery(self, recover = False):
to_provision = self._to_provision = set()
reserved = set(self._blacklist)
for guid, node in self._elements.iteritems():
if isinstance(node, self._node.Node) and node._node_id is not None:
reserved.add(node.hostname)
# Initial algo:
# look for perfectly defined nodes
# (ie: those with only one candidate)
reserve_lock = threading.RLock()
def assignifunique(guid, node):
# Try existing nodes first
# If we have only one candidate, simply use it
candidates = node.find_candidates(
filter_slice_id = self.slice_id)
node_id = None
candidate_hosts = set(candidates.keys() if candidates else [])
reserve_lock.acquire()
try:
candidate_hosts -= reserved
if len(candidate_hosts) == 1:
hostname = iter(candidate_hosts).next()
node_id = candidates[hostname]
reserved.add(hostname)
elif not candidate_hosts:
# Try again including unassigned nodes
reserve_lock.release()
try:
candidates = node.find_candidates()
finally:
reserve_lock.acquire()
candidate_hosts = set(candidates.keys() if candidates else [])
candidate_hosts -= reserved
if len(candidate_hosts) > 1:
return
if len(candidate_hosts) == 1:
hostname = iter(candidate_hosts).next()
node_id = candidates[hostname]
to_provision.add(node_id)
reserved.add(hostname)
elif not candidates:
raise RuntimeError, "Cannot assign resources for node %s, no candidates with %s" % (guid,
node.make_filter_description())
finally:
reserve_lock.release()
if node_id is not None:
node.assign_node_id(node_id)
runner = ParallelRun(maxthreads=4) # don't overload the PLC API, just 4 threads to hide latencies and that's it
runner.start()
for guid, node in self._elements.iteritems():
if isinstance(node, self._node.Node) and node._node_id is None:
runner.put(assignifunique, guid, node)
runner.sync()
# Now do the backtracking search for a suitable solution
# First with existing slice nodes
reqs = []
nodes = []
def genreqs(node, filter_slice_id=None):
# Try existing nodes first
# If we have only one candidate, simply use it
candidates = node.find_candidates(
filter_slice_id = filter_slice_id)
for r in reserved:
if candidates.has_key(r):
del candidates[r]
reqs.append(candidates.values())
nodes.append(node)
for guid, node in self._elements.iteritems():
if isinstance(node, self._node.Node) and node._node_id is None:
runner.put(genreqs, node, self.slice_id)
runner.sync()
if nodes and reqs:
if recover:
raise RuntimeError, "Impossible to recover: unassigned host for Nodes %r" % (nodes,)
def pickbest(fullset, nreq, node=nodes[0]):
if len(fullset) > nreq:
fullset = zip(node.rate_nodes(fullset),fullset)
fullset.sort(reverse=True)
del fullset[nreq:]
return set(map(operator.itemgetter(1),fullset))
else:
return fullset
try:
solution = resourcealloc.alloc(reqs, sample=pickbest)
except resourcealloc.ResourceAllocationError:
# Failed, try again with all nodes
reqs = []
for node in nodes:
runner.put(genreqs, node)
runner.sync()
solution = resourcealloc.alloc(reqs, sample=pickbest)
to_provision.update(solution)
# Do assign nodes
for node, node_id in zip(nodes, solution):
runner.put(node.assign_node_id, node_id)
runner.join()
