Use grpc_bazel.sh to run the xds test client using bazel

tools/internal_ci/linux/grpc_xds.cfg

@@ -15,5 +15,9 @@
 # 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.sh"
+build_file: "grpc/tools/internal_ci/linux/grpc_bazel.sh"
 timeout_mins: 60
+env_vars {
+  key: "BAZEL_SCRIPT"
+  value: "tools/internal_ci/linux/grpc_xds_bazel_test_in_docker.sh"
+}

tools/internal_ci/linux/grpc_xds.sh

@@ -1,27 +0,0 @@
-#!/usr/bin/env bash
-# Copyright 2020 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 -ex
-
-# change to grpc repo root
-cd $(dirname $0)/../../..
-
-tools/run_tests/helper_scripts/prep_xds.sh
-python3 tools/run_tests/run_xds_tests.py \
-    --test_case=all \
-    --project_id=grpc-testing \
-    --gcp_suffix=$(date '+%s') \
-    --verbose \
-    --client_cmd='bazel run test/cpp/interop:xds_interop_client -- --server=xds-experimental:///{service_host}:{service_port} --stats_port={stats_port} --qps={qps}'

tools/internal_ci/linux/grpc_xds_bazel_test_in_docker.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+# Copyright 2020 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 -ex -o igncr || set -ex
+
+mkdir -p /var/local/git
+git clone /var/local/jenkins/grpc /var/local/git/grpc
+(cd /var/local/jenkins/grpc/ && git submodule foreach 'cd /var/local/git/grpc \
+&& git submodule update --init --reference /var/local/jenkins/grpc/${name} \
+${name}')
+cd /var/local/git/grpc
+
+VIRTUAL_ENV=$(mktemp -d)
+virtualenv "$VIRTUAL_ENV"
+PYTHON="$VIRTUAL_ENV"/bin/python
+"$PYTHON" -m pip install --upgrade grpcio grpcio-tools google-api-python-client google-auth-httplib2 oauth2client
+
+# Prepare generated Python code.
+TOOLS_DIR=tools/run_tests
+PROTO_SOURCE_DIR=src/proto/grpc/testing
+PROTO_DEST_DIR="$TOOLS_DIR"/"$PROTO_SOURCE_DIR"
+mkdir -p "$PROTO_DEST_DIR"
+touch "$TOOLS_DIR"/src/__init__.py
+touch "$TOOLS_DIR"/src/proto/__init__.py
+touch "$TOOLS_DIR"/src/proto/grpc/__init__.py
+touch "$TOOLS_DIR"/src/proto/grpc/testing/__init__.py
+
+"$PYTHON" -m grpc_tools.protoc \
+    --proto_path=. \
+    --python_out="$TOOLS_DIR" \
+    --grpc_python_out="$TOOLS_DIR" \
+    "$PROTO_SOURCE_DIR"/test.proto \
+    "$PROTO_SOURCE_DIR"/messages.proto \
+    "$PROTO_SOURCE_DIR"/empty.proto
+
+"$PYTHON" tools/run_tests/run_xds_tests.py \
+    --test_case=all \
+    --project_id=grpc-testing \
+    --gcp_suffix=$(date '+%s') \
+    --verbose \
+    --client_cmd='bazel run test/cpp/interop:xds_interop_client -- --server=xds-experimental:///{service_host}:{service_port} --stats_port={stats_port} --qps={qps}'