Created test driver to run matrix test against different docker images in GCR...

Created test driver to run matrix test against different docker images in GCR and generate a Junit like test result file.

tools/interop_matrix/README.md

@@ -11,7 +11,7 @@ from specific releases/tag, are used to test version compatiblity between gRPC r
   - `--git_checkout` enables git checkout grpc release branch/tag.
   - `--release` specifies a git release tag.  Make sure it is a valid tag in the grpc github rep.
   - `--language` specifies a language.
-  For examle, To build all languages for all gRPC releases across all runtimes, do `tools/interop_matrix/create_matrix_images.py --git_checkout --release=all`.
+  For example, To build all languages for all gRPC releases across all runtimes, do `tools/interop_matrix/create_matrix_images.py --git_checkout --release=all`.
 - Verify the newly created docker images are uploaded to GCR.  For example:
   - `gcloud beta container images list --repository gcr.io/grpc-testing` shows image repos.
   - `gcloud beta container images list-tags gcr.io/grpc-testing/grpc_interop_go1.7` show tags for a image repo.
@@ -30,11 +30,17 @@ from specific releases/tag, are used to test version compatiblity between gRPC r
   - `LANG=go KEEP_IMAGE=1 ./create_testcases.sh` will generate `./testcases/go__master` and keep the local docker image so it can be invoked simply via `./testcases/go__master`.  Note: remove local docker images manually afterwards with `docker rmi <image_id>`.
 - Stage and commit the generated test case file `./testcases/<lang>__<release>`.
 
-## Instructions for running test cases against a GCR image
+## Instructions for running test cases against GCR images
+- Run `tools/interop_matrix/run_interop_matrix_tests.py`.  Useful options:
+  - `--release` specifies a git release tag.  Defaults to `--release=master`.  Make sure the GCR images with the tag have been created using `create_matrix_images.py` above.
+  - `--language` specifies a language.  Defaults to `--language=all`.
+  For example, To test all languages for all gRPC releases across all runtimes, do `tools/interop_matrix/run_interop_matrix_test.py --release=all`.
+- The output for all the test cases is recorded in a junit style xml file (default to 'report.xml').
+
+## Instructions for running test cases against a GCR image manually
 - Run test cases by specifying `docker_image` variable inline with the test case script created above.
 For example:
   - `docker_image=gcr.io/grpc-testing/grpc_interop_go1.7:master ./testcases/go__master` will run go__master test cases against `go1.7` with gRPC release `master` docker image in GCR.
 
-
 Note:
 - File path starting with `tools/` or `template/` are relative to the grpc repo root dir.  File path starting with `./` are relative to current directory (`tools/interop_matrix`).

tools/interop_matrix/create_matrix_images.py

@@ -253,5 +253,4 @@ for lang in languages:
     # docker image name must be in the format <gcr_path>/<image>:<gcr_tag>
     assert image.startswith(args.gcr_path) and image.find(':') != -1
 
-    # subprocess.call(['gcloud', 'docker', '--', 'push', image])
     subprocess.call(['gcloud', 'docker', '--', 'push', image])

tools/interop_matrix/run_interop_matrix_tests.py

+#!/usr/bin/env python2.7
+# Copyright 2017 gRPC authors.
+#
+# 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.
+
+"""Run tests using docker images in Google Container Registry per matrix."""
+
+from __future__ import print_function
+
+import argparse
+import atexit
+import json
+import multiprocessing
+import os
+import re
+import subprocess
+import sys
+import uuid
+
+# Langauage Runtime Matrix
+import client_matrix
+
+python_util_dir = os.path.abspath(os.path.join(
+    os.path.dirname(__file__), '../run_tests/python_utils'))
+sys.path.append(python_util_dir)
+import dockerjob
+import jobset
+import report_utils
+
+_LANGUAGES = client_matrix.LANG_RUNTIME_MATRIX.keys()
+# All gRPC release tags, flattened, deduped and sorted.
+_RELEASES = sorted(list(set(
+    i for l in client_matrix.LANG_RELEASE_MATRIX.values() for i in l)))
+_TEST_TIMEOUT = 30
+
+argp = argparse.ArgumentParser(description='Run interop tests.')
+argp.add_argument('-j', '--jobs', default=multiprocessing.cpu_count(), type=int)
+argp.add_argument('--gcr_path',
+                  default='gcr.io/grpc-testing',
+                  help='Path of docker images in Google Container Registry')
+
+argp.add_argument('--release',
+                  default='master',
+                  choices=['all', 'master'] + _RELEASES,
+                  help='Release tags to test.  When testing all '
+                  'releases defined in client_matrix.py, use "all".')
+
+argp.add_argument('-l', '--language',
+                  choices=['all'] + sorted(_LANGUAGES),
+                  nargs='+',
+                  default=['all'],
+                  help='Languages to test')
+
+argp.add_argument('--keep',
+                  action='store_true',
+                  help='keep the created local images after finishing the tests.')
+
+argp.add_argument('--report_file',
+                  default='report.xml',
+                  help='The result file to create.')
+
+args = argp.parse_args()
+
+
+def find_all_images_for_lang(lang):
+  """Find docker images for a language across releases and runtimes.
+
+  Returns dictionary of list of (<tag>, <image-full-path>) keyed by runtime.
+  """
+  # Find all defined releases.
+  if args.release == 'all':
+    releases = ['master'] + client_matrix.LANG_RELEASE_MATRIX[lang]
+  else:
+    # Look for a particular release.
+    if args.release not in ['master'] + client_matrix.LANG_RELEASE_MATRIX[lang]:
+      jobset.message('SKIPPED',
+                     '%s for %s is not defined' % (args.release, lang),
+                     do_newline=True)
+      return []
+    releases = [args.release]
+
+  # Images tuples keyed by runtime.
+  images = {}
+  for runtime in client_matrix.LANG_RUNTIME_MATRIX[lang]:
+    image_path = '%s/grpc_interop_%s' % (args.gcr_path, runtime)
+    output = subprocess.check_output(['gcloud', 'beta', 'container', 'images',
+                                        'list-tags', '--format=json', image_path])
+    docker_image_list = json.loads(output)
+    # All images should have a single tag or no tag.
+    tags = [i['tags'][0] for i in docker_image_list if i['tags']]
+    jobset.message('START', 'Found images for %s: %s' % (image_path, tags),
+                   do_newline=True)
+    skipped = len(docker_image_list) - len(tags)
+    jobset.message('START', 'Skipped images (no-tag/unknown-tag): %d' % skipped,
+                   do_newline=True)
+    # Filter tags based on the releases.
+    images[runtime] = [(tag,'%s:%s' % (image_path,tag)) for tag in tags if
+                       tag in releases]
+  return images
+
+# caches test cases (list of JobSpec) loaded from file.  Keyed by lang and runtime.
+_loaded_testcases = {}
+def find_test_cases(lang, release):
+  """Returns the list of test cases from testcase files per lang/release."""
+  file_tmpl = os.path.join(os.path.dirname(__file__), 'testcases/%s__%s')
+  if not os.path.exists(file_tmpl % (lang, release)):
+    release = 'master'
+  testcases = file_tmpl % (lang, release)
+  if lang in _loaded_testcases.keys() and release in _loaded_testcases[lang].keys():
+    return _loaded_testcases[lang][release]
+
+  job_spec_list=[]
+  try:
+    with open(testcases) as f:
+      # Only line start with 'docker run' are test cases.
+      for line in f.readlines():
+        if line.startswith('docker run'):
+          m = re.search('--test_case=(.*)"', line)
+          shortname = m.group(1) if m else 'unknown_test'
+          spec = jobset.JobSpec(cmdline=line,
+                                shortname=shortname,
+                                timeout_seconds=_TEST_TIMEOUT,
+                                shell=True)
+          job_spec_list.append(spec)
+      jobset.message('START',
+                     'Loaded %s tests from %s' % (len(job_spec_list), testcases),
+                     do_newline=True)
+  except IOError as err:
+    jobset.message('FAILED', err, do_newline=True)
+  if lang not in _loaded_testcases.keys():
+    _loaded_testcases[lang] = {}
+  _loaded_testcases[lang][release]=job_spec_list
+  return job_spec_list
+
+_xml_report_tree = None
+def run_tests_for_lang(lang, runtime, images):
+  """Find and run all test cases for a language.
+
+  images is a list of (<release-tag>, <image-full-path>) tuple.
+  """
+  for image_tuple in images:
+    release, image = image_tuple
+    jobset.message('START', 'Testing %s' % image, do_newline=True)
+    _docker_images_cleanup.append(image)
+    job_spec_list = find_test_cases(lang,release)
+    num_failures, resultset = jobset.run(job_spec_list,
+                                         newline_on_success=True,
+                                         add_env={'docker_image':image},
+                                         maxjobs=args.jobs)
+    if num_failures:
+      jobset.message('FAILED', 'Some tests failed', do_newline=True)
+    else:
+      jobset.message('SUCCESS', 'All tests passed', do_newline=True)
+
+    # Required, otherwise _xml_report_tree will be shadowed by local (undefined)
+    # reference in the next line.
+    global _xml_report_tree
+    _xml_report_tree = report_utils.add_junit_xml_results(
+        resultset,
+        'grpc_interop_matrix',
+        '%s__%s:%s'%(lang,runtime,release),
+        str(uuid.uuid4()),
+        _xml_report_tree)
+
+_docker_images_cleanup = []
+def cleanup():
+  if not args.keep:
+    for image in _docker_images_cleanup:
+      dockerjob.remove_image(image, skip_nonexistent=True)
+
+atexit.register(cleanup)
+
+languages = args.language if args.language != ['all'] else _LANGUAGES
+for lang in languages:
+  docker_images = find_all_images_for_lang(lang)
+  for runtime in sorted(docker_images.keys()):
+    run_tests_for_lang(lang, runtime, docker_images[runtime])
+
+report_utils.create_xml_report_file(args.report_file, _xml_report_tree)

tools/run_tests/python_utils/report_utils.py

@@ -46,8 +46,22 @@ def _filter_msg(msg, output_format):
 def render_junit_xml_report(resultset, xml_report, suite_package='grpc',
                             suite_name='tests'):
   """Generate JUnit-like XML report."""
-  root = ET.Element('testsuites')
-  testsuite = ET.SubElement(root, 'testsuite', id='1', package=suite_package,
+  tree = add_junit_xml_results(resultset, suite_package, suite_name, '1')
+  create_xml_report_file(xml_report, tree)
+
+def create_xml_report_file(xml_report, tree):
+  """Generate JUnit-like report file from xml tree ."""
+  # ensure the report directory exists
+  report_dir = os.path.dirname(os.path.abspath(xml_report))
+  if not os.path.exists(report_dir):
+    os.makedirs(report_dir)
+  tree.write(xml_report, encoding='UTF-8')
+
+def add_junit_xml_results(resultset, suite_package, suite_name, id,
+                          old_tree=None):
+  """Returns a JUnit-like XML report tree with added test results."""
+  root = ET.Element('testsuites')  if not old_tree else old_tree.getroot()
+  testsuite = ET.SubElement(root, 'testsuite', id=id, package=suite_package,
                             name=suite_name)
   failure_count  = 0
   error_count = 0
@@ -67,13 +81,7 @@ def render_junit_xml_report(resultset, xml_report, suite_package='grpc',
         ET.SubElement(xml_test, 'skipped', message='Skipped')
   testsuite.set('failures', str(failure_count))
   testsuite.set('errors', str(error_count))
-  # ensure the report directory exists
-  report_dir = os.path.dirname(os.path.abspath(xml_report))
-  if not os.path.exists(report_dir):
-    os.makedirs(report_dir)
-  tree = ET.ElementTree(root)
-  tree.write(xml_report, encoding='UTF-8')
-
+  return ET.ElementTree(root)
 
 def render_interop_html_report(
   client_langs, server_langs, test_cases, auth_test_cases, http2_cases,