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)
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)
