def update(self, new_topology, old_topology):
conf = sys_util().get_sys_conf()
db = FactoryAgent().get_agent(conf['database_manager'])
updated_topology = old_topology
updated_topology.name = new_topology.name
#check for additional service instances and add them to the list of new instances
appended_service_instances = []
for new_service_instance in new_topology.service_instances:
is_found = False
for updated_service_instance in updated_topology.service_instances:
if new_service_instance.name == updated_service_instance.name:
is_found = True
break
if not is_found:
appended_service_instances.append(new_service_instance)
#check for removed service instances and add it to the list of removed instances
removed_service_instances = []
for updated_service_instance in updated_topology.service_instances:
is_found = False
for new_service_instance in new_topology.service_instances:
if new_service_instance.name == updated_service_instance.name:
is_found = True
break
if not is_found:
removed_service_instances.append(updated_service_instance)
#remove removed service instances
for removed_service_instance in removed_service_instances:
updated_topology.service_instances.remove(removed_service_instance)
LOG.debug('Removed ServiceInstance \"%s\" from Topology \"%s\".' %
(removed_service_instance.name, updated_topology.name))
#append additional service instances
for appended_service_instance in appended_service_instances:
appended_service_instance.topology_id = updated_topology.id
updated_topology.service_instances.append(
appended_service_instance)
if appended_service_instance.policies is not None:
for policy in appended_service_instance.policies:
db.persist(policy)
db.persist(appended_service_instance)
LOG.debug('Appended ServiceInstance \"%s\" to Topology \"%s\".' %
(appended_service_instance.name, updated_topology.name))
#Update all values for each service instance
for updated_service_instance in updated_topology.service_instances:
for new_service_instance in new_topology.service_instances:
if updated_service_instance.name == new_service_instance.name:
updated_service_instance.size = new_service_instance.size
updated_service_instance.configuration = new_service_instance.configuration
updated_service_instance.policies = new_service_instance.policies
#updated_service_instance.service_type = new_service_instance.service_type
if new_service_instance.service_type and updated_service_instance.service_type != new_service_instance.service_type:
LOG.warning(
"Cannot update service_type for %s->%s. Not Implemented."
% (updated_topology.name,
updated_service_instance.name))
if new_service_instance.adapter and updated_service_instance.adapter != new_service_instance.adapter:
LOG.warning(
"Cannot update adapter for %s->%s. Not Implemented."
% (updated_topology.name,
updated_service_instance.name))
#updated_service_instance.flavor = new_service_instance.flavor
if new_service_instance.flavor and updated_service_instance.flavor.name != new_service_instance.flavor.name:
LOG.warning(
"Cannot update flavor for %s->%s. Not Implemented."
% (updated_topology.name,
updated_service_instance.name))
#updated_service_instance.image = new_service_instance.image
if new_service_instance.image and updated_service_instance.image.name != new_service_instance.image.name:
LOG.warning(
"Cannot update image for %s->%s. Not Implemented."
% (updated_topology.name,
updated_service_instance.name))
#updated_service_instance.networks = new_service_instance.networks
if new_service_instance.networks is not None:
LOG.warning(
"Cannot update networks for %s->%s. Not Implemented."
% (updated_topology.name,
updated_service_instance.name))
#updated_service_instance.requirements = new_service_instance.requirements
if new_service_instance.requirements is not None:
LOG.warning(
"Cannot update networks for %s->%s. Not Implemented."
% (updated_topology.name,
updated_service_instance.name))
#updated_service_instance.user_data = new_service_instance.user_data
if new_service_instance.user_data is not None:
LOG.warning(
"Cannot update user_data for %s->%s. Not Implemented."
% (updated_topology.name,
updated_service_instance.name))
if new_service_instance.key and updated_service_instance.key.name != new_service_instance.key.name:
LOG.warning(
"Cannot update key for %s->%s without replacement."
% (updated_topology.name,
updated_service_instance.name))
#Add or remove units according to minimal or maximal size
for updated_service_instance in updated_topology.service_instances:
if updated_service_instance not in appended_service_instances:
if len(updated_service_instance.units
) < updated_service_instance.size.get('min'):
for i in range(
updated_service_instance.size.get('min') -
len(updated_service_instance.units)):
_hostname = '%s-%s' % (
updated_service_instance.name,
str(len(updated_service_instance.units) + 1))
_state = 'DEFINED'
new_unit = Unit(hostname=_hostname, state=_state)
new_unit.service_instance_id = updated_service_instance.id
updated_service_instance.units.append(new_unit)
db.persist(new_unit)
if len(updated_service_instance.units
) > updated_service_instance.size.get('max'):
for i in range(
len(updated_service_instance.units) -
updated_service_instance.size.get('max')):
removed_unit = updated_service_instance.units.pop(
len(updated_service_instance.units) - 1)
db.remove(removed_unit)
return updated_topology
class PolicyThread(threading.Thread):
def __init__(self, topology, runtime_agent, policy, service_instance, lock, dnsaas):
super(PolicyThread, self).__init__()
self.policy = policy
self.service_instance = service_instance
self.topology = topology
self.runtime_agent = runtime_agent
self.monitor = runtime_agent.monitoring_service
self.lock = lock
if dnsaas is not None:
self.is_dnsaas = True
self.dns_configurator = ImsDnsClient(dnsaas)
else:
self.is_dnsaas = False
self.counter = 0
self.is_stopped = False
conf = SysUtil().get_sys_conf()
self.template_manager = FactoryAgent().get_agent(conf["template_manager"])
self.db = FactoryAgent().get_agent(conf["database_manager"])
self.heat_client = HeatClient()
def run(self):
logger.info("Initialise policy thread for policy %s" % self.policy.name)
self.wait_until_final_state()
logger.info("Starting policy thread for policy %s" % self.policy.name)
if self.is_stopped:
logger.info("Cannot start policy threads. PolicyThreads are stopped.")
elif self.topology.state in ["DEPLOYED", "UPDATED"]:
self.start_policy_checker_si()
logger.info("Started policy thread for policy %s" % self.policy.name)
else:
logger.error(
"ERROR: Something went wrong. Seems to be an error. Topology state -> %s. Didn't start the PolicyThread"
% self.topology.state
)
def wait_until_final_state(self, final_states=[]):
if len(final_states) == 0:
final_states = ["DEPLOYED", "UPDATED", "ERROR", "DELETED"]
units_count = 0
for service_instance in self.topology.service_instances:
units_count += len(service_instance.units)
i = 0
while not self.is_stopped and not self.topology.state in final_states and not i > units_count * 100:
logger.debug("PolicyThread for %s -> Waiting 5 seconds" % self.policy.name)
time.sleep(5)
i += 1
def check_alarm_unit(self, unit, monitoring_service):
logger.debug("checking for alarms")
alarm = self.policy.alarm
logger.debug("request item value: %s" % unit.hostname)
item_value = monitoring_service.get_item(
res_id=unit.ext_id, item_name=alarm.meter_name, kwargs={"period": alarm.evaluation_periods}
)
# item_value = 50
logger.debug("received item value: %s" % item_value)
if alarm.comparison_operator == ">" or alarm.comparison_operator == "gt":
logger.debug("Check upscaling: check that item value is bigger than threshold")
if item_value > alarm.threshold:
# hack for demo
self.counter += 1
if self.counter > 1:
logger.info("Counter %s Trigger the action: %s" % repr(self.counter, self.policy.action))
return True
else:
logger.info(
"Not triggering action %s since the counter is still under 1 (%s)"
% (repr(self.policy.action), self.counter)
)
return False
else:
logger.debug("Check upscaling: item value is lower than threshold")
elif alarm.comparison_operator == "<" or alarm.comparison_operator == "lt":
logger.debug("Check downscaling: check that item value is lower than threshold")
if item_value < alarm.threshold:
logger.info("Trigger the action: %s" % repr(self.policy.action))
return True
else:
logger.debug("Check downscaling: item value is bigger than threshold")
logger.debug("Check item values finished")
return False
def start_policy_checker_si(self):
logger.debug(
"Start active_policy check for policy %s on service instance %s"
% (self.policy.name, self.service_instance.name)
)
while not self.is_stopped:
logger.debug("Locking policy checking from %s" % self.policy.name)
self.lock.acquire()
logger.debug("Locked policy checking from %s" % self.policy.name)
action = self.policy.action
if action.scaling_adjustment > 0:
if (len(self.service_instance.units) + action.scaling_adjustment) > self.service_instance.size.get(
"max"
):
logger.warning(
"Check upscaling - Maximum number of unit exceeded for service instance: %s"
% self.service_instance.name
)
logger.debug("Release Policy lock by %s" % self.policy.name)
self.lock.release()
time.sleep(self.policy.period)
continue
if action.scaling_adjustment < 0:
if (len(self.service_instance.units) + action.scaling_adjustment) < self.service_instance.size.get(
"min"
):
logger.warning(
"Check downscaling - Minimum number of unit exceeded for service instance: %s"
% self.service_instance.name
)
logger.debug("Release Policy lock by %s" % self.policy.name)
self.lock.release()
time.sleep(self.policy.period)
continue
if self.service_instance.state != "UPDATING" and self.check_alarm_si():
logger.debug("Execute action: %s" % repr(self.policy.action))
if action.adjustment_type == "ChangeInCapacity":
self.service_instance.state = "UPDATING"
self.topology.state = "UPDATING"
if action.scaling_adjustment > 0:
logger.info("executing scaling out action ")
info = {
"so_id": "idnotusefulhere",
"sm_name": "imsaas",
"so_phase": "update",
"phase_event": "start",
"response_time": 0,
"tenant": "mcntub",
}
self.start_time = time.time()
info_json = json.dumps(info)
glogger.debug(info_json)
if (
len(self.service_instance.units) + action.scaling_adjustment
) <= self.service_instance.size.get("max"):
for i in range(action.scaling_adjustment):
_hostname = "%s-%s" % (
self.service_instance.name,
str(len(self.service_instance.units) + 1),
)
_state = "DEFINED"
new_unit = Unit(hostname=_hostname, state=_state)
new_unit.service_instance_id = self.service_instance.id
self.service_instance.units.append(new_unit)
self.db.persist(new_unit)
else:
logger.warning(
"Maximum number of unit exceeded for service instance: %s" % self.service_instance.name
)
else:
logger.info("executing scaling in action ")
if (
len(self.service_instance.units) + action.scaling_adjustment
) >= self.service_instance.size.get("min"):
for i in range(-action.scaling_adjustment):
removed_unit = self.remove_unit(self.topology, self.service_instance)
self.db.remove(removed_unit)
else:
logger.warning(
"Minimum number of unit exceeded for service instance: %s" % self.service_instance.name
)
topology = self.db.update(self.topology)
template = self.template_manager.get_template(self.topology)
# logger.debug("Send update to heat template with: \n%s" % template)
if action.scaling_adjustment <= 0:
logger.info("provisioning the unit after scaling in operation")
self.configure_after_scaling(removed_unit)
try:
logger.info("updating the heat template including new units")
self.heat_client.update(stack_id=self.topology.ext_id, template=template)
self.wait_until_final_state()
logger.info("wait until final state function executed")
if self.topology.state not in ["DEPLOYED", "UPDATED"]:
logger.error(
"ERROR: Something went wrong. Seems to be an error. Topology state -> %s"
% self.topology.state
)
self.lock.release()
return
except:
self.is_stopped = True
self.lock.release()
logger.info("entering provisioning phase")
if action.scaling_adjustment > 0:
logger.info("provisioning new unit after scaling out operation")
# adding relations between newly added unit and existing units from dependent services
self.configure_new_unit(new_unit)
logger.info("Sleeping (cooldown) for %s seconds" % self.policy.action.cooldown)
time.sleep(self.policy.action.cooldown)
logger.debug("Release Policy lock from %s" % self.policy.name)
self.lock.release()
logger.info("Sleeping (evaluation period) for %s seconds" % self.policy.period)
time.sleep(self.policy.period)
def configure_new_unit(self, unit):
logging.info("configuring new unit with hostname %s" % unit.hostname)
config = {}
config["hostname"] = unit.hostname
config["ips"] = unit.ips
config["zabbix_ip"] = os.environ["ZABBIX_IP"]
config["floating_ips"] = unit.floating_ips
config["hostname"] = unit.hostname
try:
logging.info("sending requests to the adapter %s with config" % config)
self.service_instance.adapter_instance.preinit(config)
self.service_instance.adapter_instance.install(config)
except Exception, e:
logging.error("error while configuring vnf %s" % e)
self.add_relations_after_scaling(config, unit)
try:
self.service_instance.adapter_instance.pre_start(config)
self.service_instance.adapter_instance.start(config)
except Exception, e:
logging.error("error while configuring vnf %s" % e)
def update(self, new_topology, old_topology):
conf = sys_util().get_sys_conf()
db = FactoryAgent().get_agent(conf['database_manager'])
updated_topology = old_topology
updated_topology.name = new_topology.name
#check for additional service instances and add them to the list of new instances
appended_service_instances = []
for new_service_instance in new_topology.service_instances:
is_found = False
for updated_service_instance in updated_topology.service_instances:
if new_service_instance.name == updated_service_instance.name:
is_found = True
break
if not is_found:
appended_service_instances.append(new_service_instance)
#check for removed service instances and add it to the list of removed instances
removed_service_instances = []
for updated_service_instance in updated_topology.service_instances:
is_found = False
for new_service_instance in new_topology.service_instances:
if new_service_instance.name == updated_service_instance.name:
is_found = True
break
if not is_found:
removed_service_instances.append(updated_service_instance)
#remove removed service instances
for removed_service_instance in removed_service_instances:
updated_topology.service_instances.remove(removed_service_instance)
logger.debug('Removed ServiceInstance \"%s\" from Topology \"%s\".' % (removed_service_instance.name, updated_topology.name))
#append additional service instances
for appended_service_instance in appended_service_instances:
appended_service_instance.topology_id = updated_topology.id
updated_topology.service_instances.append(appended_service_instance)
if appended_service_instance.policies is not None:
for policy in appended_service_instance.policies:
db.persist(policy)
db.persist(appended_service_instance)
logger.debug('Appended ServiceInstance \"%s\" to Topology \"%s\".' % (appended_service_instance.name, updated_topology.name))
#Update all values for each service instance
for updated_service_instance in updated_topology.service_instances:
for new_service_instance in new_topology.service_instances:
if updated_service_instance.name == new_service_instance.name:
updated_service_instance.size = new_service_instance.size
updated_service_instance.configuration = new_service_instance.configuration
updated_service_instance.policies = new_service_instance.policies
#updated_service_instance.service_type = new_service_instance.service_type
if new_service_instance.service_type and updated_service_instance.service_type != new_service_instance.service_type:
logger.warning("Cannot update service_type for %s->%s. Not Implemented." % (updated_topology.name, updated_service_instance.name))
if new_service_instance.adapter and updated_service_instance.adapter != new_service_instance.adapter:
logger.warning("Cannot update adapter for %s->%s. Not Implemented." % (updated_topology.name, updated_service_instance.name))
#updated_service_instance.flavor = new_service_instance.flavor
if new_service_instance.flavor and updated_service_instance.flavor.name != new_service_instance.flavor.name:
logger.warning("Cannot update flavor for %s->%s. Not Implemented." % (updated_topology.name, updated_service_instance.name))
#updated_service_instance.image = new_service_instance.image
if new_service_instance.image and updated_service_instance.image.name != new_service_instance.image.name:
logger.warning("Cannot update image for %s->%s. Not Implemented." % (updated_topology.name, updated_service_instance.name))
#updated_service_instance.networks = new_service_instance.networks
if new_service_instance.networks is not None:
logger.warning("Cannot update networks for %s->%s. Not Implemented." % (updated_topology.name, updated_service_instance.name))
#updated_service_instance.requirements = new_service_instance.requirements
if new_service_instance.requirements is not None:
logger.warning("Cannot update networks for %s->%s. Not Implemented." % (updated_topology.name, updated_service_instance.name))
#updated_service_instance.user_data = new_service_instance.user_data
if new_service_instance.user_data is not None:
logger.warning("Cannot update user_data for %s->%s. Not Implemented." % (updated_topology.name, updated_service_instance.name))
if new_service_instance.key and updated_service_instance.key.name != new_service_instance.key.name:
logger.warning("Cannot update key for %s->%s without replacement." % (updated_topology.name, updated_service_instance.name))
#Add or remove units according to minimal or maximal size
for updated_service_instance in updated_topology.service_instances:
if updated_service_instance not in appended_service_instances:
if len(updated_service_instance.units) < updated_service_instance.size.get('min'):
for i in range(updated_service_instance.size.get('min') - len(updated_service_instance.units)):
_hostname = '%s-%s' % (
updated_service_instance.name, str(len(updated_service_instance.units) + 1))
_state = 'DEFINED'
new_unit = Unit(hostname=_hostname, state=_state)
new_unit.service_instance_id = updated_service_instance.id
updated_service_instance.units.append(new_unit)
db.persist(new_unit)
if len(updated_service_instance.units) > updated_service_instance.size.get('max'):
for i in range(len(updated_service_instance.units) - updated_service_instance.size.get('max')):
removed_unit = updated_service_instance.units.pop(len(updated_service_instance.units) - 1)
db.remove(removed_unit)
return updated_topology
def delete(cls, topology):
conf = sys_util().get_sys_conf()
db = FactoryAgent().get_agent(conf['database_manager'])
db.remove(topology)
return topology