Kubernetes: Infrastructure For K8S Net testing.

This patch adds necessary code to perform K8S Networking performance
benchmarking.

Signed-off-by: Sridhar K. N. Rao <sridhar.rao@spirent.com>
Change-Id: I059ddd2e9ad3ee7c05e4620c64401f81474be195

4 files changed, 147 insertions, 3 deletions

diff --git a/core/component_factory.py b/core/component_factory.py
index 2c51a060..f13bfb5b 100644
--- a/core/component_factory.py
+++ b/core/component_factory.py
@@ -24,7 +24,7 @@ from core.vswitch_controller_op2p import VswitchControllerOP2P
 from core.vswitch_controller_ptunp import VswitchControllerPtunP
 from core.vnf_controller import VnfController
 from core.pktfwd_controller import PktFwdController
-
+from core.pod_controller import PodController
 
 def __init__():
     """Finds and loads all the modules required.
@@ -102,6 +102,19 @@ def create_vnf(deployment_scenario, vnf_class, extra_vnfs):
     """
     return VnfController(deployment_scenario, vnf_class, extra_vnfs)
 
+def create_pod(deployment_scenario, pod_class):
+    """Return a new PodController for the deployment_scenario.
+
+    The returned controller is configured with the given POD class.
+
+    Deployment scenarios: 'pvp', 'pvvp'
+
+    :param deployment_scenario: The deployment scenario name
+    :param pod_class: Reference to pod class to be used.
+    :return: PodController for the deployment_scenario
+    """
+    return PodController(deployment_scenario, pod_class)
+
 def create_collector(collector_class, result_dir, test_name):
     """Return a new Collector of the given class
 
diff --git a/core/loader/loader.py b/core/loader/loader.py
index dcd77ced..45e0d5ba 100755
--- a/core/loader/loader.py
+++ b/core/loader/loader.py
@@ -23,6 +23,7 @@ from tools.pkt_fwd.pkt_fwd import IPktFwd
 from tools.pkt_gen.trafficgen import ITrafficGenerator
 from vswitches.vswitch import IVSwitch
 from vnfs.vnf.vnf import IVnf
+from pods.pod.pod import IPod
 
 # pylint: disable=too-many-public-methods
 class Loader(object):
@@ -71,6 +72,11 @@ class Loader(object):
             settings.getValue('PKTFWD'),
             IPktFwd)
 
+        self._pod_loader = LoaderServant(
+            settings.getValue('POD_DIR'),
+            settings.getValue('POD'),
+            IPod)
+
     def get_trafficgen(self):
         """Returns a new instance configured traffic generator.
 
@@ -220,6 +226,37 @@ class Loader(object):
         """
         return self._vnf_loader.get_classes_printable()
 
+    def get_pod(self):
+        """Returns instance of currently configured pod implementation.
+
+        :return: IPod implementation if available, None otherwise.
+        """
+        return self._pod_loader.get_class()()
+
+    def get_pod_class(self):
+        """Returns type of currently configured pod implementation.
+
+        :return: Type of IPod implementation if available.
+            None otherwise.
+        """
+        return self._pod_loader.get_class()
+
+    def get_pods(self):
+        """Returns dictionary of all available pods.
+
+        :return: Dictionary of pods.
+            - key: name of the class which implements IPod,
+            - value: Type of vnf which implements IPod.
+        """
+        return self._pod_loader.get_classes()
+
+    def get_pods_printable(self):
+        """Returns all available pods in printable format.
+
+        :return: String containing printable list of pods.
+        """
+        return self._pod_loader.get_classes_printable()
+
     def get_pktfwd(self):
         """Returns instance of currently configured packet forwarder implementation.
 
diff --git a/core/pod_controller.py b/core/pod_controller.py
new file mode 100644
index 00000000..8bc91ec4
--- /dev/null
+++ b/core/pod_controller.py
@@ -0,0 +1,93 @@
+# 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()
diff --git a/core/vswitch_controller_p2p.py b/core/vswitch_controller_p2p.py
index d8f22e4c..0037d484 100644
--- a/core/vswitch_controller_p2p.py
+++ b/core/vswitch_controller_p2p.py
@@ -45,8 +45,9 @@ class VswitchControllerP2P(IVswitchController):
             (port1, _) = self._vswitch.add_phy_port(self._bridge)
             (port2, _) = self._vswitch.add_phy_port(self._bridge)
 
-            self._vswitch.add_connection(self._bridge, port1, port2, self._traffic)
-            self._vswitch.add_connection(self._bridge, port2, port1, self._traffic)
+            if not settings.getValue('K8S'):
+                self._vswitch.add_connection(self._bridge, port1, port2, self._traffic)
+                self._vswitch.add_connection(self._bridge, port2, port1, self._traffic)
 
         except:
             self._vswitch.stop()