Introducing Standalone context for running test in non-managed environment.

This patch introduces standalone virtualization context to
deploy/undeploy NFVi infrastructure to run the VNF

Supported NFVi Type:
  - vswitch
   - ovs
   - ovs-dpdk
   - sr-iov
   - testpmd
   - linuxbridge

This patches inits the function stubs to enable the standalone context.
Actual deploy/undeploy code will be added in later check-in

v2: Added unit tests to keep test coverage :)

JIRA: YARDSTICK-479
Change-Id: I6ab3ac3335f40eabc4efb0af7d5addc20c122d65
Signed-off-by: Deepak S <deepak.s@linux.intel.com>

1 files changed, 116 insertions, 0 deletions

diff --git a/yardstick/benchmark/contexts/standalone.py b/yardstick/benchmark/contexts/standalone.py
new file mode 100644
index 000000000..c1d963f50
--- /dev/null
+++ b/yardstick/benchmark/contexts/standalone.py
@@ -0,0 +1,116 @@
+# Copyright (c) 2016-2017 Intel Corporation
+#
+# 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.
+"""This module handle non managed standalone virtualization node."""
+
+from __future__ import absolute_import
+import logging
+import errno
+import collections
+import yaml
+
+from yardstick.benchmark.contexts.base import Context
+from yardstick.definitions import YARDSTICK_ROOT_PATH
+
+LOG = logging.getLogger(__name__)
+
+
+class StandaloneContext(Context):
+    """ This class handles standalone nodes - VM running on Non-Managed NFVi
+    Configuration: vswitch, ovs, ovs-dpdk, sr-iov, linuxbridge
+    """
+
+    __context_type__ = "Standalone"
+
+    def __init__(self):
+        self.name = None
+        self.file_path = None
+        self.nodes = []
+        self.nfvi_node = []
+        super(self.__class__, self).__init__()
+
+    def read_config_file(self):
+        """Read from config file"""
+
+        with open(self.file_path) as stream:
+            LOG.info("Parsing pod file: %s", self.file_path)
+            cfg = yaml.load(stream)
+        return cfg
+
+    def init(self, attrs):
+        """initializes itself from the supplied arguments"""
+
+        self.name = attrs["name"]
+        self.file_path = attrs.get("file", "pod.yaml")
+        LOG.info("Parsing pod file: %s", self.file_path)
+
+        try:
+            cfg = self.read_config_file()
+        except IOError as ioerror:
+            if ioerror.errno == errno.ENOENT:
+                self.file_path = YARDSTICK_ROOT_PATH + self.file_path
+                cfg = self.read_config_file()
+            else:
+                raise
+
+        self.nodes.extend(cfg["nodes"])
+        self.nfvi_node.extend([node for node in cfg["nodes"]
+                               if node["role"] == "nfvi_node"])
+        LOG.debug("Nodes: %r", self.nodes)
+        LOG.debug("NFVi Node: %r", self.nfvi_node)
+
+    def deploy(self):
+        """don't need to deploy"""
+
+        # Todo: NFVi deploy (sriov, vswitch, ovs etc) based on the config.
+        pass
+
+    def undeploy(self):
+        """don't need to undeploy"""
+
+        # Todo: NFVi undeploy (sriov, vswitch, ovs etc) based on the config.
+        pass
+
+    def _get_server(self, attr_name):
+        """lookup server info by name from context
+
+        Keyword arguments:
+        attr_name -- A name for a server listed in nodes config file
+        """
+
+        if isinstance(attr_name, collections.Mapping):
+            return None
+
+        if self.name.split("-")[0] != attr_name.split(".")[1]:
+            return None
+
+        node_name = attr_name.split(".")[0]
+        matching_nodes = (n for n in self.nodes if n["name"] == node_name)
+
+        try:
+            # A clone is created in order to avoid affecting the
+            # original one.
+            node = dict(next(matching_nodes))
+        except StopIteration:
+            return None
+
+        try:
+            duplicate = next(matching_nodes)
+        except StopIteration:
+            pass
+        else:
+            raise ValueError("Duplicate nodes!!! Nodes: %s %s",
+                             (matching_nodes, duplicate))
+
+        node["name"] = attr_name
+        return node