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# Copyright 2020 Spirent Communications
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" pod Controller interface
"""
import logging
import pexpect
#from conf import settings
from pods.pod.pod import IPod
class PodController():
"""POD controller class
Used to set-up and control PODs for specified scenario
Attributes:
_pod_class: A class object representing the POD.
_deployment: A string describing the scenario to set-up in the
constructor.
_pods: A list of pods controlled by the controller.
"""
def __init__(self, deployment, pod_class):
"""Sets up the POD infrastructure based on deployment scenario
:param pod_class: The POD class to be used.
"""
# reset POD ID counter for each testcase
IPod.reset_pod_counter()
pod_number = 0
# setup controller with requested number of pods
self._logger = logging.getLogger(__name__)
self._pod_class = pod_class
self._deployment = deployment.lower()
self._pods = []
if self._deployment == 'p2p':
pod_number = 1
if pod_number:
self._pods = [pod_class() for _ in range(pod_number)]
self._logger.debug('Initializing the pod')
def get_pods(self):
"""Returns a list of pods controlled by this controller.
"""
self._logger.debug('get the pods')
return self._pods
def get_pods_number(self):
"""Returns a number of pods controlled by this controller.
"""
self._logger.debug('get_pods_number %s pod[s]', str(len(self._pods)))
return len(self._pods)
def start(self):
"""Boots all pods set-up by __init__.
This is a blocking function.
"""
self._logger.debug('start the pod')
try:
for pod in self._pods:
pod.create()
except pexpect.TIMEOUT:
self.stop()
raise
def stop(self):
"""Stops all pods set-up by __init__.
This is a blocking function.
"""
self._logger.debug('stopping the pod')
for pod in self._pods:
pod.terminate()
def __enter__(self):
self.start()
def __exit__(self, type_, value, traceback):
self.stop()
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