Add xds kokoro config and update the test script

packages/grpc-js/scripts/xds.sh

@@ -1,10 +1,19 @@
 #!/bin/bash
 
+# Install NVM
+cd ~
+export NVM_DIR=`pwd`/.nvm
+curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.4/install.sh | bash
+
+# Load NVM
+. $NVM_DIR/nvm.sh
+
+nvm install 12
+
 set -exu -o pipefail
 [[ -f /VERSION ]] && cat /VERSION
 
-cd $(dirname $0)
-cd ..
+cd $(dirname $0)/..
 base=$(pwd)
 npm run compile
 
@@ -14,14 +23,9 @@ git clone -b master --single-branch --depth=1 https://github.com/grpc/grpc.git
 
 grpc/tools/run_tests/helper_scripts/prep_xds.sh
 
-# Test cases "path_matching" and "header_matching" are not included in "all",
-# because not all interop clients in all languages support these new tests.
-#
-# TODO: remove "path_matching" and "header_matching" from --test_case after
-# they are added into "all".
-GRPC_NODE_TRACE=all GRPC_NODE_VERBOSITY=DEBUG \
+GRPC_NODE_TRACE=xds_client,xds_resolver,cds_balancer,eds_balancer,priority,weighted_target,round_robin,resolving_load_balancer,subchannel,keepalive,dns_resolver GRPC_NODE_VERBOSITY=DEBUG \
   python3 grpc/tools/run_tests/run_xds_tests.py \
-    --test_case="all" \
+    --test_case="backends_restart,change_backend_service,gentle_failover,ping_pong,remove_instance_group,round_robin,secondary_locality_gets_no_requests_on_partial_primary_failure,secondary_locality_gets_requests_on_primary_failure" \
     --project_id=grpc-testing \
     --source_image=projects/grpc-testing/global/images/xds-test-server-2 \
     --path_to_server_binary=/java_server/grpc-java/interop-testing/build/install/grpc-interop-testing/bin/xds-test-server \

test/kokoro/linux.cfg

@@ -20,6 +20,5 @@ timeout_mins: 60
 action {
   define_artifacts {
     regex: "github/grpc-node/reports/**/sponge_log.xml"
-    regex: "github/grpc/reports/**"
   }
 }

test/kokoro/xds-interop.cfg

@@ -0,0 +1,24 @@
+# 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.
+
+# Config file for Kokoro (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc-node/packages/grpc-js/scripts/xds.sh"
+timeout_mins: 60
+action {
+  define_artifacts {
+    regex: "github/grpc/reports/**"
+  }
+}