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authorSridhar K. N. Rao <sridhar.rao@spirent.com>2017-11-28 16:52:15 +0530
committerSridhar K. N. Rao <sridhar.rao@spirent.com>2018-01-21 14:01:45 +0530
commita874f412c78c04ae02b92a3d0da8a10956f80b74 (patch)
tree15d59b5b4f22b7c08b355b5d4a02b66afeade47c /tools/load_gen/stressorvm/stressor_vm.py
parente1a3083e346bb53fa533e5c7ad3b7c14c3c6f0b9 (diff)
loadgen: Support for Stressor-VMs as a Loadgen
This patch adds support for stressor-VMs as a loadgen in VSPERF. The changes include: 1. 07_loadgen.conf: User can specify the stressor-VM specific configuration. It includes, image-name, path, nics, memory, etc. 2. loadgen/stressorvm/stressor_vm.py: This file implement ILoadGenerator interface. It implements all the necessary APIs for starting and stopping the loads. 3. Fixed Pylint Error 4. Removed the network device configuration from qemu-system-x86_64 command as stessor-vm mostly focus on CPU and memory stressing. 5. Moved the creation of loadgen after the VNFs are setup in testcase.py. 6. Fixed copyright issues. 7. Removed python-3 checking. Improved exception handling 8. Set Default loadgen as DummyLoadGen 9. Improved OSError Printing with directory name and error 10. Update the year in license. 2017-2018. JIRA: VSPERF-504 Change-Id: Iad6c0780c184f8e36eddcbcae2a580f41118e8dc Signed-off-by: Sridhar K. N. Rao <sridhar.rao@spirent.com>
Diffstat (limited to 'tools/load_gen/stressorvm/stressor_vm.py')
-rw-r--r--tools/load_gen/stressorvm/stressor_vm.py117
1 files changed, 117 insertions, 0 deletions
diff --git a/tools/load_gen/stressorvm/stressor_vm.py b/tools/load_gen/stressorvm/stressor_vm.py
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+++ b/tools/load_gen/stressorvm/stressor_vm.py
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+# Copyright 2017-2018 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.
+
+"""
+Wrapper file to create and manage Stressor-VM as loadgen
+"""
+
+import logging
+import os
+from tools import tasks
+from tools.load_gen.load_gen import ILoadGenerator
+from conf import settings as S
+
+
+class QemuVM(tasks.Process):
+ """
+ Class for controling an instance of QEMU
+ """
+ def __init__(self, index):
+ self._running = False
+ self._logger = logging.getLogger(__name__)
+ self._number = index
+ pnumber = int(S.getValue('NN_BASE_VNC_PORT')) + self._number
+ cpumask = ",".join(S.getValue('NN_CORE_BINDING')[self._number])
+ self._monitor = '%s/vm%dmonitor' % ('/tmp', pnumber)
+ self._logfile = (os.path.join(S.getValue('LOG_DIR'),
+ S.getValue('NN_LOG_FILE')) +
+ str(self._number))
+ self._log_prefix = 'vnf_%d_cmd : ' % pnumber
+ name = 'NN%d' % index
+ vnc = ':%d' % pnumber
+ self._shared_dir = '%s/qemu%d_share' % ('/tmp', pnumber)
+ if not os.path.exists(self._shared_dir):
+ try:
+ os.makedirs(self._shared_dir)
+ except OSError as exp:
+ raise OSError("Failed to create shared directory %s: %s",
+ self._shared_dir, exp)
+
+ self.nics_nr = S.getValue('NN_NICS_NR')[self._number]
+ self.image = S.getValue('NN_IMAGE')[self._number]
+ self._cmd = ['sudo', '-E', 'taskset', '-c', cpumask,
+ S.getValue('TOOLS')['qemu-system'],
+ '-m', S.getValue('NN_MEMORY')[self._number],
+ '-smp', S.getValue('NN_SMP')[self._number],
+ '-cpu', 'host,migratable=off',
+ '-drive', 'if={},file='.format(
+ S.getValue('NN_BOOT_DRIVE_TYPE')[self._number]) +
+ self.image, '-boot',
+ 'c', '--enable-kvm',
+ '-monitor', 'unix:%s,server,nowait' % self._monitor,
+ '-nographic', '-vnc', str(vnc), '-name', name,
+ '-snapshot', '-net none', '-no-reboot',
+ '-drive',
+ 'if=%s,format=raw,file=fat:rw:%s,snapshot=off' %
+ (S.getValue('NN_SHARED_DRIVE_TYPE')[self._number],
+ self._shared_dir)
+ ]
+
+ def start(self):
+ """
+ Start QEMU instance
+ """
+ super(QemuVM, self).start()
+ self._running = True
+
+ def stop(self, sig, slp):
+ """
+ Stops VNF instance.
+ """
+ if self._running:
+ self._logger.info('Killing VNF...')
+ # force termination of VNF and wait to terminate; It will avoid
+ # sporadic reboot of host.
+ super(QemuVM, self).kill(signal=sig, sleep=slp)
+ # remove shared dir if it exists to avoid issues with file consistency
+ if os.path.exists(self._shared_dir):
+ tasks.run_task(['rm', '-f', '-r', self._shared_dir], self._logger,
+ 'Removing content of shared directory...', True)
+ self._running = False
+
+
+# pylint: disable=super-init-not-called
+class StressorVM(ILoadGenerator):
+ """
+ Wrapper Class for Load-Generation through stressor-vm
+ """
+ # pylint: disable=unused-argument
+ def __init__(self, config):
+ self.qvm_list = []
+ for vmindex in range(int(S.getValue('NN_COUNT'))):
+ qvm = QemuVM(vmindex)
+ self.qvm_list.append(qvm)
+
+ def start(self):
+ """Start stressor VMs
+ """
+ for nvm in self.qvm_list:
+ nvm.start()
+
+ def kill(self, signal='-9', sleep=2):
+ """
+ Stop Stressor VMs
+ """
+ for nvm in self.qvm_list:
+ nvm.stop(signal, sleep)