from nepi.core.attributes import Attribute, AttributesMap
from nepi.util import proxy, validation
-from nepi.util.constants import STATUS_FINISHED
+from nepi.util.constants import STATUS_FINISHED, TIME_NOW
from nepi.util.parser._xml import XmlExperimentParser
import sys
import re
+import threading
+import ConfigParser
+import os
ATTRIBUTE_PATTERN_BASE = re.compile(r"\{#\[(?P<label>[-a-zA-Z0-9._]*)\](?P<expr>(?P<component>\.addr\[[0-9]+\]|\.route\[[0-9]+\]|\.trace\[[0-9]+\]|).\[(?P<attribute>[-a-zA-Z0-9._]*)\])#}")
ATTRIBUTE_PATTERN_GUID_SUB = r"{#[%(guid)s]%(expr)s#}"
+COMPONENT_PATTERN = re.compile(r"(?P<kind>[a-z]*)\[(?P<index>.*)\]")
class ConnectorType(object):
def __init__(self, testbed_id, factory_id, name, max = -1, min = 0):
# need a definition!
class Factory(AttributesMap):
def __init__(self, factory_id, create_function, start_function,
- stop_function, status_function, configure_function,
+ stop_function, status_function,
+ configure_function, preconfigure_function,
allow_addresses = False, allow_routes = False):
super(Factory, self).__init__()
self._factory_id = factory_id
self._stop_function = stop_function
self._status_function = status_function
self._configure_function = configure_function
+ self._preconfigure_function = preconfigure_function
self._connector_types = dict()
self._traces = list()
self._box_attributes = AttributesMap()
def configure_function(self):
return self._configure_function
+ @property
+ def preconfigure_function(self):
+ return self._preconfigure_function
+
@property
def traces(self):
return self._traces
self._box_attributes.add_attribute(name, help, type, value, range,
allowed, flags, validation_function)
-class TestbedInstance(object):
+class TestbedController(object):
def __init__(self, testbed_id, testbed_version):
self._testbed_id = testbed_id
self._testbed_version = testbed_version
def get(self, time, guid, name):
raise NotImplementedError
+
+ def get_route(self, guid, index, attribute):
+ """
+ Params:
+
+ guid: guid of box to query
+ index: number of routing entry to fetch
+ attribute: one of Destination, NextHop, NetPrefix
+ """
+ raise NotImplementedError
+
+ def get_address(self, guid, index, attribute='Address'):
+ """
+ Params:
+
+ guid: guid of box to query
+ index: number of inteface to select
+ attribute: one of Address, NetPrefix, Broadcast
+ """
+ raise NotImplementedError
def action(self, time, guid, action):
raise NotImplementedError
def status(self, guid):
raise NotImplementedError
- def trace(self, guid, trace_id):
+ def trace(self, guid, trace_id, attribute='value'):
raise NotImplementedError
def shutdown(self):
raise NotImplementedError
class ExperimentController(object):
- def __init__(self, experiment_xml):
+ def __init__(self, experiment_xml, root_dir):
self._experiment_xml = experiment_xml
self._testbeds = dict()
self._access_config = dict()
- self._label_guids = dict()
+ self._netrefs = dict()
+ self._root_dir = root_dir
+
+ self.persist_experiment_xml()
@property
def experiment_xml(self):
return self._experiment_xml
+ def persist_experiment_xml(self):
+ xml_path = os.path.join(self._root_dir, "experiment.xml")
+ f = open(xml_path, "w")
+ f.write(self._experiment_xml)
+ f.close()
+
def set_access_configuration(self, testbed_guid, access_config):
self._access_config[testbed_guid] = access_config
- def trace(self, testbed_guid, guid, trace_id):
- return self._testbeds[testbed_guid].trace(guid, trace_id)
+ def trace(self, testbed_guid, guid, trace_id, attribute='value'):
+ return self._testbeds[testbed_guid].trace(guid, trace_id, attribute)
+
+ @staticmethod
+ def _parallel(callables):
+ threads = [ threading.Thread(target=callable) for callable in callables ]
+ for thread in threads:
+ thread.start()
+ for thread in threads:
+ thread.join()
def start(self):
self._create_testbed_instances()
- for testbed in self._testbeds.values():
- testbed.do_setup()
- for testbed in self._testbeds.values():
- testbed.do_create()
- testbed.do_connect()
- testbed.do_configure()
+
+ # persist testbed connection data, for potential recovery
+ self._persist_testbed_proxies()
+
+ # perform setup in parallel for all test beds,
+ # wait for all threads to finish
+ self._parallel([testbed.do_setup
+ for testbed in self._testbeds.itervalues()])
+
+ # perform create-connect in parallel, wait
+ # (internal connections only)
+ self._parallel([lambda : (testbed.do_create(),
+ testbed.do_connect(),
+ testbed.do_preconfigure())
+ for testbed in self._testbeds.itervalues()])
+
+ # resolve netrefs
+ self.do_netrefs(fail_if_undefined=True)
+
+ # perform do_configure in parallel for al testbeds
+ # (it's internal configuration for each)
+ self._parallel([testbed.do_configure
+ for testbed in self._testbeds.itervalues()])
+
+ # cross-connect (cannot be done in parallel)
for testbed in self._testbeds.values():
testbed.do_cross_connect()
- for testbed in self._testbeds.values():
- testbed.start()
+
+ # start experiment (parallel start on all testbeds)
+ self._parallel([testbed.start
+ for testbed in self._testbeds.itervalues()])
+
+ def _persist_testbed_proxies(self):
+ TRANSIENT = ('Recover',)
+
+ # persist access configuration for all testbeds, so that
+ # recovery mode can reconnect to them if it becomes necessary
+ conf = ConfigParser.RawConfigParser()
+ for testbed_guid, testbed_config in self._access_config.iteritems():
+ testbed_guid = str(testbed_guid)
+ conf.add_section(testbed_guid)
+ for attr in testbed_config.attributes_name:
+ if attr not in TRANSIENT:
+ conf.set(testbed_guid, attr,
+ testbed_config.get_attribute_value(attr))
+
+ f = open(os.path.join(self._root_dir, 'access_config.ini'), 'w')
+ conf.write(f)
+ f.close()
+
+ def _load_testbed_proxies(self):
+ TYPEMAP = {
+ STRING : 'get',
+ INTEGER : 'getint',
+ FLOAT : 'getfloat',
+ BOOLEAN : 'getboolean',
+ }
+
+ conf = ConfigParser.RawConfigParser()
+ conf.read(os.path.join(self._root_dir, 'access_config.ini'))
+ for testbed_guid in conf.sections():
+ testbed_config = proxy.AccessConfiguration()
+ for attr in conf.options(testbed_guid):
+ testbed_config.set_attribute_value(attr,
+ conf.get(testbed_guid, attr) )
+
+ testbed_guid = str(testbed_guid)
+ conf.add_section(testbed_guid)
+ for attr in testbed_config.attributes_name:
+ if attr not in TRANSIENT:
+ getter = getattr(conf, TYPEMAP.get(
+ testbed_config.get_attribute_type(attr),
+ 'get') )
+ testbed_config.set_attribute_value(
+ testbed_guid, attr, getter(attr))
+
+ def _unpersist_testbed_proxies(self):
+ try:
+ os.remove(os.path.join(self._root_dir, 'access_config.ini'))
+ except:
+ # Just print exceptions, this is just cleanup
+ import traceback
+ traceback.print_exc(file=sys.stderr)
def stop(self):
for testbed in self._testbeds.values():
testbed.stop()
+ self._unpersist_testbed_proxies()
+
+ def recover(self):
+ # reload perviously persisted testbed access configurations
+ self._load_testbed_proxies()
+
+ # recreate testbed proxies by reconnecting only
+ self._create_testbed_instances(recover=True)
def is_finished(self, guid):
for testbed in self._testbeds.values():
for testbed in self._testbeds.values():
testbed.shutdown()
- def _create_testbed_instances(self):
+ @staticmethod
+ def _netref_component_split(component):
+ match = COMPONENT_PATTERN.match(component)
+ if match:
+ return match.group("kind"), match.group("index")
+ else:
+ return component, None
+
+ def do_netrefs(self, fail_if_undefined = False):
+ COMPONENT_GETTERS = {
+ 'addr' :
+ lambda testbed, guid, index, name :
+ testbed.get_address(guid, index, name),
+ 'route' :
+ lambda testbed, guid, index, name :
+ testbed.get_route(guid, index, name),
+ 'trace' :
+ lambda testbed, guid, index, name :
+ testbed.trace(guid, index, name),
+ '' :
+ lambda testbed, guid, index, name :
+ testbed.get(TIME_NOW, guid, name),
+ }
+
+ for (testbed_guid, guid), attrs in self._netrefs.iteritems():
+ testbed = self._testbeds[testbed_guid]
+ for name in attrs:
+ value = testbed.get(TIME_NOW, guid, name)
+ if isinstance(value, basestring):
+ match = ATTRIBUTE_PATTERN_BASE.search(value)
+ if match:
+ label = match.group("label")
+ if label.startswith('GUID-'):
+ ref_guid = int(label[5:])
+ if ref_guid:
+ expr = match.group("expr")
+ component = match.group("component")[1:] # skip the dot
+ attribute = match.group("attribute")
+
+ # split compound components into component kind and index
+ # eg: 'addr[0]' -> ('addr', '0')
+ component, component_index = self._netref_component_split(component)
+
+ # find object and resolve expression
+ for ref_testbed in self._testbeds.itervalues():
+ if component not in COMPONENT_GETTERS:
+ raise ValueError, "Malformed netref: %r - unknown component" % (expr,)
+ else:
+ value = COMPONENT_GETTERS[component](
+ ref_testbed, ref_guid, component_index, attribute)
+ if value:
+ break
+ else:
+ # couldn't find value
+ if fail_if_undefined:
+ raise ValueError, "Unresolvable GUID: %r, in netref: %r" % (ref_guid, expr)
+
+ def _create_testbed_instances(self, recover = False):
parser = XmlExperimentParser()
data = parser.from_xml_to_data(self._experiment_xml)
element_guids = list()
label_guids = dict()
data_guids = data.guids
+ netrefs = self._netrefs
for guid in data_guids:
if data.is_testbed_data(guid):
(testbed_id, testbed_version) = data.get_testbed_data(guid)
access_config = None if guid not in self._access_config else\
self._access_config[guid]
+
+ if recover and access_config is None:
+ # need to create one
+ access_config = self._access_config[guid] = proxy.AccessConfiguration()
+ if access_config is not None:
+ # force recovery mode
+ access_config.set_attribute_value("recover",recover)
+
testbed = proxy.create_testbed_instance(testbed_id,
testbed_version, access_config)
for (name, value) in data.get_attribute_data(guid):
match = ATTRIBUTE_PATTERN_BASE.search(value)
if match:
label = match.group("label")
- ref_guid = label_guids.get(label)
- if ref_guid is not None:
- value = ATTRIBUTE_PATTERN_BASE.sub(
- ATTRIBUTE_PATTERN_GUID_SUB % dict(
- guid=ref_guid,
- expr=match.group("expr"),
- label=label),
- value)
- data.set_attribute_data(guid, name, value)
- self._label_guids = label_guids
- self._program_testbed_instances(element_guids, data)
+ if not label.startswith('GUID-'):
+ ref_guid = label_guids.get(label)
+ if ref_guid is not None:
+ value = ATTRIBUTE_PATTERN_BASE.sub(
+ ATTRIBUTE_PATTERN_GUID_SUB % dict(
+ guid='GUID-%d' % (ref_guid,),
+ expr=match.group("expr"),
+ label=label),
+ value)
+ data.set_attribute_data(guid, name, value)
+
+ # memorize which guid-attribute pairs require
+ # postprocessing, to avoid excessive controller-testbed
+ # communication at configuration time
+ # (which could require high-latency network I/O)
+ (testbed_guid, factory_id) = data.get_box_data(guid)
+ netrefs.setdefault((testbed_guid,guid),set()).add(name)
+ if not recover:
+ self._program_testbed_instances(element_guids, data)
def _program_testbed_instances(self, element_guids, data):
for guid in element_guids:
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