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#!/usr/bin/python
#
# This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
#
# http://www.apache.org/licenses/LICENSE-2.0
"""Clamp Scenario class."""
from yaml import load, SafeLoader
import random
import string
import time
from onapsdk.clamp.clamp_element import Clamp
from onapsdk.sdc.service import Service
import onaptests.utils.exceptions as onap_test_exceptions
from onapsdk.configuration import settings
from onaptests.steps.onboard.clamp import OnboardClampStep
from onaptests.steps.loop.instantiate_loop import InstantiateLoop
from ..base import YamlTemplateBaseStep
class ClampStep(YamlTemplateBaseStep):
"""class defining the different CLAMP scenarios."""
count: int = 0
def __init__(self):
super().__init__(cleanup=settings.CLEANUP_FLAG)
self._yaml_template: dict = None
self.add_step(OnboardClampStep())
Clamp()
self.loop_instance = None
@property
def description(self) -> str:
"""Step description."""
return "Retrieve TCA, Policy then create a loop"
@property
def component(self) -> str:
"""Component name."""
return "CLAMP"
@property
def yaml_template(self) -> dict:
"""Step YAML template.
Load from file if it's a root step, get from parent otherwise.
Returns:
dict: Step YAML template
"""
if self.is_root:
if not self._yaml_template:
with open(settings.SERVICE_YAML_TEMPLATE, "r") as yaml_template:
self._yaml_template: dict = load(yaml_template, SafeLoader)
return self._yaml_template
return self.parent.yaml_template
@property
def model_yaml_template(self) -> dict:
return {}
@property
def service_name(self) -> str:
"""Service name.
Get from YAML template if it's a root step, get from parent otherwise.
Returns:
str: Service name
"""
if self.is_root:
return next(iter(self.yaml_template.keys()))
else:
return self.parent.service_name
def check(self, operational_policies: list, is_template: bool = False) -> str:
"""Check CLAMP requirements to create a loop."""
self._logger.info("Check operational policy")
for policy in operational_policies:
exist = Clamp.check_policies(policy_name=policy["name"],
req_policies=30) # 30 required policy
self._logger.info("Operational policy found.")
if not exist:
raise ValueError("Couldn't load the policy %s", policy)
# retrieve the service..based on service name
service: Service = Service(self.service_name)
if is_template:
loop_template = Clamp.check_loop_template(service=service)
self._logger.info("Loop template checked.")
return loop_template
def instantiate_clamp(self, loop_template: str, loop_name: str, operational_policies: list):
"""Instantite a closed loopin CLAMP."""
letters = string.ascii_letters
loop_name_random = loop_name.join(
random.choice(letters) for i in range(6))
loop = InstantiateLoop(template=loop_template,
loop_name=loop_name_random,
operational_policies=operational_policies)
return loop.instantiate_loop()
def loop_counter(self, action: str) -> None:
""" Count number of loop instances."""
if action == "plus":
self.count += 1
if action == "minus":
self.count -= 1
@YamlTemplateBaseStep.store_state
def execute(self):
super().execute() # TODO work only the 1st time, not if already onboarded
# Before instantiating, be sure that the service has been distributed
service = Service(self.service_name)
self._logger.info("******** Check Service Distribution *******")
distribution_completed = False
nb_try = 0
nb_try_max = 10
while distribution_completed is False and nb_try < nb_try_max:
distribution_completed = service.distributed
if distribution_completed is True:
self._logger.info(
"Service Distribution for %s is sucessfully finished",
service.name)
break
self._logger.info(
"Service Distribution for %s ongoing, Wait for 60 s",
service.name)
time.sleep(60)
nb_try += 1
if distribution_completed is False:
self._logger.error(
"Service Distribution for %s failed !!", service.name)
raise onap_test_exceptions.ServiceDistributionException
# time to wait for template load in CLAMP
self._logger.info("Wait a little bit to give a chance to the distribution")
time.sleep(settings.CLAMP_DISTRIBUTION_TIMER)
# Test 1
operational_policies = settings.OPERATIONAL_POLICIES
loop_template = self.check(operational_policies, True)
# Test 2
loop_name = "instance_" + self.service_name + str(self.count)
self.loop_counter(action="plus")
self.loop_instance = self.instantiate_clamp(
loop_template=loop_template,
loop_name=loop_name,
operational_policies=operational_policies)
@YamlTemplateBaseStep.store_state(cleanup=True)
def cleanup(self) -> None:
"""Cleanup Service.
Raises:
Exception: Clamp cleaning failed
"""
self.loop_counter(action="minus")
self.loop_instance.undeploy_microservice_from_dcae()
self.loop_instance.delete()
super().cleanup()
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