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# Copyright 2011 Quanta Research Cambridge, Inc.
#
# 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.
"""Defines various sub-classes of the `StressTestCase` and
`PendingServerAction` class. Sub-classes of StressTestCase implement various
API calls on the Nova cluster having to do with Server Actions. Each
sub-class will have a corresponding PendingServerAction. These pending
actions veriy that the API call was successful or not."""
import random
import time
import pending_action
from tempest.exceptions import Duplicate
import test_case
from utils.util import *
class TestRebootVM(test_case.StressTestCase):
"""Reboot a server."""
def run(self, manager, state, *pargs, **kwargs):
"""
Send an HTTP POST request to the nova cluster to reboot a random
server. Update state of object in `state` variable to indicate that
it is rebooting.
`manager` : Manager object
`state` : `State` object describing our view of state of cluster
`pargs` : positional arguments
`kwargs` : keyword arguments, which include:
`timeout` : how long to wait before issuing Exception
`type` : reboot type [SOFT or HARD] (default is SOFT)
"""
vms = state.get_instances()
active_vms = [v for k, v in vms.iteritems() if v and v[1] == 'ACTIVE']
# no active vms, so return null
if not active_vms:
self._logger.info('no ACTIVE instances to reboot')
return
_reboot_arg = kwargs.get('type', 'SOFT')
# select active vm to reboot and then send request to nova controller
target = random.choice(active_vms)
reboot_target = target[0]
# It seems that doing a reboot when in reboot is an error.
try:
response, body = manager.servers_client.reboot(reboot_target['id'],
_reboot_arg)
except Duplicate:
return
if (response.status != 202):
self._logger.error("response: %s" % response)
raise Exception
if _reboot_arg == 'SOFT':
reboot_state = 'REBOOT'
else:
reboot_state = 'HARD_REBOOT'
self._logger.info('waiting for machine %s to change to %s' %
(reboot_target['id'], reboot_state))
return VerifyRebootVM(manager,
state,
reboot_target,
reboot_state=reboot_state)
class VerifyRebootVM(pending_action.PendingServerAction):
"""Class to verify that the reboot completed."""
States = enum('REBOOT_CHECK', 'ACTIVE_CHECK')
def __init__(self, manager, state, target_server,
reboot_state=None,
ip_addr=None):
super(VerifyRebootVM, self).__init__(manager,
state,
target_server)
self._reboot_state = reboot_state
self._retry_state = self.States.REBOOT_CHECK
def retry(self):
"""
Check to see that the server of interest has actually rebooted. Update
state to indicate that server is running again.
"""
# don't run reboot verification if target machine has been
# deleted or is going to be deleted
target_id = self._target['id']
if (self._target['id'] not in self._state.get_instances().keys() or
self._state.get_instances()[target_id][1] == 'TERMINATING'):
self._logger.debug('machine %s is deleted or TERMINATING' %
self._target['id'])
return True
reboot_state = self._reboot_state
if self._retry_state == self.States.REBOOT_CHECK:
server_state = self._check_for_status(reboot_state)
if server_state == reboot_state:
self._logger.info('machine %s ACTIVE -> %s' %
(self._target['id'], reboot_state))
self._state.set_instance_state(self._target['id'],
(self._target, reboot_state))
self._retry_state = self.States.ACTIVE_CHECK
elif server_state == 'ACTIVE':
# machine must have gone ACTIVE -> REBOOT ->ACTIVE
self._retry_state = self.States.ACTIVE_CHECK
elif self._retry_state == self.States.ACTIVE_CHECK:
if not self._check_for_status('ACTIVE'):
return False
target = self._target
self._logger.info('machine %s %s -> ACTIVE [%.1f secs elapsed]' %
(target['id'], reboot_state, self.elapsed()))
self._state.set_instance_state(target['id'],
(target, 'ACTIVE'))
return True
# This code needs to be tested against a cluster that supports resize.
#class TestResizeVM(test_case.StressTestCase):
# """Resize a server (change flavors)."""
#
# def run(self, manager, state, *pargs, **kwargs):
# """
# Send an HTTP POST request to the nova cluster to resize a random
# server. Update `state` to indicate server is rebooting.
#
# `manager` : Manager object.
# `state` : `State` object describing our view of state of cluster
# `pargs` : positional arguments
# `kwargs` : keyword arguments, which include:
# `timeout` : how long to wait before issuing Exception
# """
#
# vms = state.get_instances()
# active_vms = [v for k, v in vms.iteritems() if v and v[1] == 'ACTIVE']
# # no active vms, so return null
# if not active_vms:
# self._logger.debug('no ACTIVE instances to resize')
# return
#
# target = random.choice(active_vms)
# resize_target = target[0]
# print resize_target
#
# _timeout = kwargs.get('timeout', 600)
#
# # determine current flavor type, and resize to a different type
# # m1.tiny -> m1.small, m1.small -> m1.tiny
# curr_size = int(resize_target['flavor']['id'])
# if curr_size == 1:
# new_size = 2
# else:
# new_size = 1
# flavor_type = { 'flavorRef': new_size } # resize to m1.small
#
# post_body = json.dumps({'resize' : flavor_type})
# url = '/servers/%s/action' % resize_target['id']
# (response, body) = manager.request('POST',
# url,
# body=post_body)
#
# if (response.status != 202):
# self._logger.error("response: %s" % response)
# raise Exception
#
# state_name = check_for_status(manager, resize_target, 'RESIZE')
#
# if state_name == 'RESIZE':
# self._logger.info('machine %s: ACTIVE -> RESIZE' %
# resize_target['id'])
# state.set_instance_state(resize_target['id'],
# (resize_target, 'RESIZE'))
#
# return VerifyResizeVM(manager,
# state,
# resize_target,
# state_name=state_name,
# timeout=_timeout)
#
#class VerifyResizeVM(pending_action.PendingServerAction):
# """Verify that resizing of a VM was successful."""
# States = enum('VERIFY_RESIZE_CHECK', 'ACTIVE_CHECK')
#
# def __init__(self, manager, state, created_server,
# state_name=None,
# timeout=300):
# super(VerifyResizeVM, self).__init__(manager,
# state,
# created_server,
# timeout=timeout)
# self._retry_state = self.States.VERIFY_RESIZE_CHECK
# self._state_name = state_name
#
# def retry(self):
# """
# Check to see that the server was actually resized. And change `state`
# of server to running again.
# """
# # don't run resize if target machine has been deleted
# # or is going to be deleted
# if (self._target['id'] not in self._state.get_instances().keys() or
# self._state.get_instances()[self._target['id']][1] ==
# 'TERMINATING'):
# self._logger.debug('machine %s is deleted or TERMINATING' %
# self._target['id'])
# return True
#
# if self._retry_state == self.States.VERIFY_RESIZE_CHECK:
# if self._check_for_status('VERIFY_RESIZE') == 'VERIFY_RESIZE':
# # now issue command to CONFIRM RESIZE
# post_body = json.dumps({'confirmResize' : null})
# url = '/servers/%s/action' % self._target['id']
# (response, body) = manager.request('POST',
# url,
# body=post_body)
# if (response.status != 204):
# self._logger.error("response: %s" % response)
# raise Exception
#
# self._logger.info(
# 'CONFIRMING RESIZE of machine %s [%.1f secs elapsed]' %
# (self._target['id'], self.elapsed())
# )
# state.set_instance_state(self._target['id'],
# (self._target, 'CONFIRM_RESIZE'))
#
# # change states
# self._retry_state = self.States.ACTIVE_CHECK
#
# return False
#
# elif self._retry_state == self.States.ACTIVE_CHECK:
# if not self._check_manager("ACTIVE"):
# return False
# else:
# server = self._manager.get_server(self._target['id'])
#
# # Find private IP of server?
# try:
# (_, network) = server['addresses'].popitem()
# ip = network[0]['addr']
# except KeyError:
# self._logger.error(
# 'could not get ip address for machine %s' %
# self._target['id']
# )
# raise Exception
#
# self._logger.info(
# 'machine %s: VERIFY_RESIZE -> ACTIVE [%.1f sec elapsed]' %
# (self._target['id'], self.elapsed())
# )
# self._state.set_instance_state(self._target['id'],
# (self._target, 'ACTIVE'))
#
# return True
#
# else:
# # should never get here
# self._logger.error('Unexpected state')
# raise Exception
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