Add cnf-conformance in functest-kubernetes-cnf

It selects cnf-conformance v0.7.2-beta1 (current latest release) and
the default CNF as proposed by [1].

The end user is free to override the default yml files on purpose (e.g.
docker volumes). Tag (default: all) could be modified too via
testcases.yaml

[1] https://hackmd.io/@vulk/SkY54QnsU

Change-Id: Iec2a830c441e523e067f6eb114ecb205c49c6b93
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

2 files changed, 104 insertions, 0 deletions

diff --git a/functest_kubernetes/cnf_conformance/__init__.py b/functest_kubernetes/cnf_conformance/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/functest_kubernetes/cnf_conformance/__init__.py
diff --git a/functest_kubernetes/cnf_conformance/conformance.py b/functest_kubernetes/cnf_conformance/conformance.py
new file mode 100644
index 00000000..1f80f15c
--- /dev/null
+++ b/functest_kubernetes/cnf_conformance/conformance.py
@@ -0,0 +1,104 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2020 Orange and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+
+"""
+The CNF Conformance program enables interoperability of Cloud native Network
+Functions (CNFs) from multiple vendors running on top of Kubernetes supplied by
+different vendors [1].
+[1] https://github.com/cncf/cnf-conformance
+"""
+
+from __future__ import division
+
+import fnmatch
+import logging
+import os
+import re
+import shutil
+import subprocess
+import time
+import yaml
+
+import prettytable
+
+from xtesting.core import testcase
+
+
+class CNFConformance(testcase.TestCase):
+    """ Implement CNF Conformance driver.
+
+    https://hackmd.io/@vulk/SkY54QnsU
+    """
+
+    src_dir = '/src/cnf-conformance'
+    bin_dir = '/usr/local/bin'
+    default_tag = 'all'
+
+    __logger = logging.getLogger(__name__)
+
+    def setup(self):
+        """Implement initialization and pre-reqs steps"""
+        os.makedirs(self.res_dir, exist_ok=True)
+
+        shutil.copy2(os.path.join(self.src_dir, 'points.yml'), self.res_dir)
+        shutil.copy2(
+            os.path.join(self.src_dir, 'cnf-conformance.yml'), self.res_dir)
+        os.chdir(self.res_dir)
+        # cnf-conformance must be in the working dir
+        # https://github.com/cncf/cnf-conformance/issues/388
+        if not os.path.exists(os.path.join(self.res_dir, 'cnf-conformance')):
+            os.symlink(
+                os.path.join(self.bin_dir, 'cnf-conformance'),
+                os.path.join(self.res_dir, 'cnf-conformance'))
+        cmd = ['cnf-conformance', 'setup']
+        output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
+        self.__logger.info("%s\n%s", " ".join(cmd), output.decode("utf-8"))
+        cmd = ['cnf-conformance', 'cnf_setup',
+               'cnf-config=cnf-conformance.yml']
+        output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
+        self.__logger.info("%s\n%s", " ".join(cmd), output.decode("utf-8"))
+
+    def run_conformance(self, **kwargs):
+        """Run CNF Conformance"""
+        # a previous results.yml leads to interactive mode
+        if os.path.exists(os.path.join(self.res_dir, 'results.yml')):
+            os.remove(os.path.join(self.res_dir, 'results.yml'))
+        cmd = ['cnf-conformance', kwargs.get("tag", self.default_tag)]
+        output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
+        self.__logger.info("%s\n%s", " ".join(cmd), output.decode("utf-8"))
+        for lfile in os.listdir(self.res_dir):
+            if fnmatch.fnmatch(lfile, 'cnf-conformance-results-*.yml'):
+                with open(os.path.join(self.res_dir, lfile)) as yfile:
+                    self.details = yaml.safe_load(yfile)
+                    msg = prettytable.PrettyTable(
+                        header_style='upper', padding_width=5,
+                        field_names=['name', 'status'])
+                    for item in self.details['items']:
+                        msg.add_row([item['name'], item['status']])
+                    self.__logger.info("\n\n%s\n", msg.get_string())
+        grp = re.search(r'Final score: (\d+) of (\d+)', output.decode("utf-8"))
+        if grp:
+            self.result = int(grp.group(1)) / int(grp.group(2)) * 100
+
+    def run(self, **kwargs):
+        """"Running the test with example CNF"""
+        self.start_time = time.time()
+        try:
+            self.setup()
+            self.run_conformance(**kwargs)
+        except Exception:  # pylint: disable=broad-except
+            self.__logger.exception("Can not run CNF Conformance")
+        self.stop_time = time.time()
+
+    def clean(self):
+        cmd = ['cnf-conformance', 'cnf_cleanup',
+               'cnf-config=cnf-conformance.yml']
+        output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
+        self.__logger.info("%s\n%s", " ".join(cmd), output.decode("utf-8"))
+        shutil.rmtree(self.res_dir)