xds-k8s/interop: add files for cross language testing (#27234)

Co-authored-by: Sergii Tkachenko <hi@sergii.org>
Co-authored-by: Sergii Tkachenko <hi@sergii.org>

tools/internal_ci/linux/grpc_xds_k8s_xlang.cfg

@@ -0,0 +1,26 @@
+# Copyright 2021 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.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_xds_k8s_xlang_java.sh"
+timeout_mins: 120
+action {
+  define_artifacts {
+    regex: "artifacts/**/*sponge_log.xml"
+    regex: "artifacts/**/*sponge_log.log"
+    strip_prefix: "artifacts"
+  }
+}

tools/internal_ci/linux/grpc_xds_k8s_xlang.sh

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+#!/usr/bin/env bash
+# Copyright 2021 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.
+
+set -eo pipefail
+
+# Constants
+readonly GITHUB_REPOSITORY_NAME="grpc"
+# GKE Cluster
+readonly GKE_CLUSTER_NAME="interop-test-psm-sec-v2-us-central1-a"
+readonly GKE_CLUSTER_ZONE="us-central1-a"
+
+## xDS test server/client Docker images
+readonly IMAGE_REPO="gcr.io/grpc-testing/xds-interop"
+readonly SERVER_LANG="cpp go java"
+readonly CLIENT_LANG="cpp go java"
+readonly VERSION_TAG="v1.40.x"
+
+#######################################
+# Executes the test case
+# Globals:
+#   TEST_DRIVER_FLAGFILE: Relative path to test driver flagfile
+#   KUBE_CONTEXT: The name of kubectl context with GKE cluster access
+#   TEST_XML_OUTPUT_DIR: Output directory for the test xUnit XML report
+#   SERVER_IMAGE_NAME: Test server Docker image name
+#   CLIENT_IMAGE_NAME: Test client Docker image name
+#   GIT_COMMIT: SHA-1 of git commit being built
+# Arguments:
+#   Test case name
+# Outputs:
+#   Writes the output of test execution to stdout, stderr
+#   Test xUnit report to ${TEST_XML_OUTPUT_DIR}/${test_name}/sponge_log.xml
+#######################################
+run_test() {
+  # Test driver usage:
+  # https://github.com/grpc/grpc/tree/master/tools/run_tests/xds_k8s_test_driver#basic-usage
+  local tag="${1:?Usage: run_test tag server_lang client_lang}"
+  local slang="${2:?Usage: run_test tag server_lang client_lang}"
+  local clang="${3:?Usage: run_test tag server_lang client_lang}"
+  local server_image_name="${IMAGE_REPO}/${slang}-server:${tag}"
+  local client_image_name="${IMAGE_REPO}/${clang}-client:${tag}"
+  # TODO(sanjaypujare): skip test if image not found (by using gcloud_gcr_list_image_tags)
+  set -x
+  python -m "tests.security_test" \
+    --flagfile="${TEST_DRIVER_FLAGFILE}" \
+    --kube_context="${KUBE_CONTEXT}" \
+    --server_image="${server_image_name}" \
+    --client_image="${client_image_name}" \
+    --xml_output_file="${TEST_XML_OUTPUT_DIR}/${tag}/${clang}-${slang}/sponge_log.xml" \
+    --force_cleanup \
+    --nocheck_local_certs
+  set +x
+}
+
+#######################################
+# Main function: provision software necessary to execute tests, and run them
+# Globals:
+#   KOKORO_ARTIFACTS_DIR
+#   GITHUB_REPOSITORY_NAME
+#   SRC_DIR: Populated with absolute path to the source repo
+#   TEST_DRIVER_REPO_DIR: Populated with the path to the repo containing
+#                         the test driver
+#   TEST_DRIVER_FULL_DIR: Populated with the path to the test driver source code
+#   TEST_DRIVER_FLAGFILE: Populated with relative path to test driver flagfile
+#   TEST_XML_OUTPUT_DIR: Populated with the path to test xUnit XML report
+#   GIT_ORIGIN_URL: Populated with the origin URL of git repo used for the build
+#   GIT_COMMIT: Populated with the SHA-1 of git commit being built
+#   GIT_COMMIT_SHORT: Populated with the short SHA-1 of git commit being built
+#   KUBE_CONTEXT: Populated with name of kubectl context with GKE cluster access
+# Arguments:
+#   None
+# Outputs:
+#   Writes the output of test execution to stdout, stderr
+#######################################
+main() {
+  local script_dir
+  script_dir="$(dirname "$0")"
+  # shellcheck source=tools/internal_ci/linux/grpc_xds_k8s_install_test_driver.sh
+  source "${script_dir}/grpc_xds_k8s_install_test_driver.sh"
+  set -x
+  if [[ -n "${KOKORO_ARTIFACTS_DIR}" ]]; then
+    kokoro_setup_test_driver "${GITHUB_REPOSITORY_NAME}"
+    cd "${TEST_DRIVER_FULL_DIR}"
+  else
+    local_setup_test_driver "${script_dir}"
+    cd "${SRC_DIR}/${TEST_DRIVER_PATH}"
+  fi
+
+  local failed_tests=0
+  # Run tests
+  for TAG in ${VERSION_TAG}
+  do
+    for CLANG in ${CLIENT_LANG}
+    do
+    for SLANG in ${SERVER_LANG}
+    do
+      if [ "${CLANG}" != "${SLANG}" ]; then
+        run_test "${TAG}" "${SLANG}" "${CLANG}" || (( failed_tests++ ))
+      fi
+    done
+    echo "Failed test suites: ${failed_tests}"
+    done
+  done
+  if (( failed_tests > 0 )); then
+    exit 1
+  fi
+}
+
+main "$@"