4 files changed, 61 insertions, 2 deletions
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index f49230e49a..c08b382638 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -44,6 +44,7 @@ cat << EOF | awk '{ print $1 }' | sort > $want_submodules
  9f897b25800d2f54f5c442ef01a60721aeca6d87 third_party/boringssl (version_for_cocoapods_1.0-67-g9f897b2)
  05b155ff59114735ec8cd089f669c4c3d8f59029 third_party/gflags (v2.1.0-45-g05b155f)
  c99458533a9b4c743ed51537e25989ea55944908 third_party/googletest (release-1.7.0)
+ 5497a1dfc91a86965383cdd1652e348345400435 third_party/nanopb (nanopb-0.3.3-10-g5497a1d)
  d5fb408ddc281ffcadeb08699e65bb694656d0bd third_party/protobuf (v3.0.0-beta-2)
  50893291621658f355bc5b4d450a8d06a563053d third_party/zlib (v1.2.8)
 EOF
diff --git a/tools/run_tests/sanity/sanity_tests.yaml b/tools/run_tests/sanity/sanity_tests.yaml
index 809e6ce645..1fc0525e02 100644
--- a/tools/run_tests/sanity/sanity_tests.yaml
+++ b/tools/run_tests/sanity/sanity_tests.yaml
@@ -7,3 +7,4 @@
 - script: tools/distrib/check_copyright.py
 - script: tools/distrib/clang_format_code.sh
 - script: tools/distrib/check_trailing_newlines.sh
+- script: tools/distrib/check_nanopb_output.sh
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 5b1b67439d..82afb5715c 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -1660,6 +1660,23 @@
   }, 
   {
     "deps": [
+      "grpc", 
+      "grpc++", 
+      "grpc++_test_util", 
+      "grpc_test_util"
+    ], 
+    "headers": [
+      "src/proto/grpc/lb/v0/load_balancer.grpc.pb.h", 
+      "src/proto/grpc/lb/v0/load_balancer.pb.h"
+    ], 
+    "language": "c++", 
+    "name": "grpclb_api_test", 
+    "src": [
+      "test/cpp/grpclb/grpclb_api_test.cc"
+    ]
+  }, 
+  {
+    "deps": [
       "gpr", 
       "gpr_test_util", 
       "grpc", 
@@ -2998,6 +3015,7 @@
       "src/core/client_config/client_config.h", 
       "src/core/client_config/connector.h", 
       "src/core/client_config/initial_connect_string.h", 
+      "src/core/client_config/lb_policies/load_balancer_api.h", 
       "src/core/client_config/lb_policies/pick_first.h", 
       "src/core/client_config/lb_policies/round_robin.h", 
       "src/core/client_config/lb_policy.h", 
@@ -3059,6 +3077,7 @@
       "src/core/json/json_common.h", 
       "src/core/json/json_reader.h", 
       "src/core/json/json_writer.h", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.h", 
       "src/core/security/auth_filters.h", 
       "src/core/security/base64.h", 
       "src/core/security/credentials.h", 
@@ -3111,7 +3130,11 @@
       "src/core/tsi/ssl_transport_security.h", 
       "src/core/tsi/ssl_types.h", 
       "src/core/tsi/transport_security.h", 
-      "src/core/tsi/transport_security_interface.h"
+      "src/core/tsi/transport_security_interface.h", 
+      "third_party/nanopb/pb.h", 
+      "third_party/nanopb/pb_common.h", 
+      "third_party/nanopb/pb_decode.h", 
+      "third_party/nanopb/pb_encode.h"
     ], 
     "language": "c", 
     "name": "grpc", 
@@ -3167,6 +3190,8 @@
       "src/core/client_config/default_initial_connect_string.c", 
       "src/core/client_config/initial_connect_string.c", 
       "src/core/client_config/initial_connect_string.h", 
+      "src/core/client_config/lb_policies/load_balancer_api.c", 
+      "src/core/client_config/lb_policies/load_balancer_api.h", 
       "src/core/client_config/lb_policies/pick_first.c", 
       "src/core/client_config/lb_policies/pick_first.h", 
       "src/core/client_config/lb_policies/round_robin.c", 
@@ -3293,6 +3318,8 @@
       "src/core/json/json_string.c", 
       "src/core/json/json_writer.c", 
       "src/core/json/json_writer.h", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.c", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.h", 
       "src/core/security/auth_filters.h", 
       "src/core/security/base64.c", 
       "src/core/security/base64.h", 
@@ -3529,6 +3556,7 @@
       "src/core/client_config/client_config.h", 
       "src/core/client_config/connector.h", 
       "src/core/client_config/initial_connect_string.h", 
+      "src/core/client_config/lb_policies/load_balancer_api.h", 
       "src/core/client_config/lb_policies/pick_first.h", 
       "src/core/client_config/lb_policies/round_robin.h", 
       "src/core/client_config/lb_policy.h", 
@@ -3590,6 +3618,7 @@
       "src/core/json/json_common.h", 
       "src/core/json/json_reader.h", 
       "src/core/json/json_writer.h", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.h", 
       "src/core/statistics/census_interface.h", 
       "src/core/statistics/census_rpc_stats.h", 
       "src/core/surface/api_trace.h", 
@@ -3628,7 +3657,11 @@
       "src/core/transport/metadata_batch.h", 
       "src/core/transport/static_metadata.h", 
       "src/core/transport/transport.h", 
-      "src/core/transport/transport_impl.h"
+      "src/core/transport/transport_impl.h", 
+      "third_party/nanopb/pb.h", 
+      "third_party/nanopb/pb_common.h", 
+      "third_party/nanopb/pb_decode.h", 
+      "third_party/nanopb/pb_encode.h"
     ], 
     "language": "c", 
     "name": "grpc_unsecure", 
@@ -3683,6 +3716,8 @@
       "src/core/client_config/default_initial_connect_string.c", 
       "src/core/client_config/initial_connect_string.c", 
       "src/core/client_config/initial_connect_string.h", 
+      "src/core/client_config/lb_policies/load_balancer_api.c", 
+      "src/core/client_config/lb_policies/load_balancer_api.h", 
       "src/core/client_config/lb_policies/pick_first.c", 
       "src/core/client_config/lb_policies/pick_first.h", 
       "src/core/client_config/lb_policies/round_robin.c", 
@@ -3808,6 +3843,8 @@
       "src/core/json/json_string.c", 
       "src/core/json/json_writer.c", 
       "src/core/json/json_writer.h", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.c", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.h", 
       "src/core/statistics/census_interface.h", 
       "src/core/statistics/census_rpc_stats.h", 
       "src/core/surface/alarm.c", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index ea9c129101..480af97368 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -2051,6 +2051,26 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c++", 
+    "name": "grpclb_api_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c++", 
     "name": "hybrid_end2end_test", 
     "platforms": [
       "linux",