[GSM Observability] Add bazel dependency on Google Cloud C++ OTel library (#34043)

Not adding CMake support yet

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bazel/googleapis.BUILD

@@ -0,0 +1,28 @@
+# Copyright 2023 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.
+
+licenses(["notice"])
+
+package(
+    default_visibility = ["//visibility:public"]
+)
+
+# This is needed for the dependency on google_cloud_cpp to work.
+# Taken from https://github.com/googleapis/google-cloud-cpp/blob/2839e9dba793ca023e11ea67f201f66f74fa7d3e/bazel/googleapis.BUILD
+cc_library(
+    name = "googleapis_system_includes",
+    includes = [
+        ".",
+    ],
+)

bazel/grpc_build_system.bzl

@@ -75,6 +75,8 @@ def _get_external_deps(external_deps):
             ret.append("@com_google_googleapis//" + dep)
         elif dep.startswith("otel/"):
             ret.append(dep.replace("otel/", "@io_opentelemetry_cpp//"))
+        elif dep.startswith("google_cloud_cpp"):
+            ret.append(dep.replace("google_cloud_cpp", "@google_cloud_cpp//"))
         else:
             ret.append("//external:" + dep)
     return ret

bazel/grpc_deps.bzl

@@ -438,6 +438,7 @@ def grpc_deps():
             name = "com_google_googleapis",
             sha256 = "5bb6b0253ccf64b53d6c7249625a7e3f6c3bc6402abd52d3778bfa48258703a0",
             strip_prefix = "googleapis-2f9af297c84c55c8b871ba4495e01ade42476c92",
+            build_file = "//bazel:googleapis.BUILD",
             urls = [
                 "https://storage.googleapis.com/grpc-bazel-mirror/github.com/googleapis/googleapis/archive/2f9af297c84c55c8b871ba4495e01ade42476c92.tar.gz",
                 "https://github.com/googleapis/googleapis/archive/2f9af297c84c55c8b871ba4495e01ade42476c92.tar.gz",
@@ -499,6 +500,17 @@ def grpc_deps():
             ],
         )
 
+    if "google_cloud_cpp" not in native.existing_rules():
+        http_archive(
+            name = "google_cloud_cpp",
+            sha256 = "371d01b03c7e2604d671b8fa1c86710abe3b524a78bc2705a6bb4de715696755",
+            strip_prefix = "google-cloud-cpp-2.14.0",
+            urls = [
+                "https://storage.googleapis.com/grpc-bazel-mirror/github.com/googleapis/google-cloud-cpp/archive/refs/tags/v2.14.0.tar.gz",
+                "https://github.com/googleapis/google-cloud-cpp/archive/refs/tags/v2.14.0.tar.gz",
+            ],
+        )
+
     grpc_python_deps()
 
 # TODO: move some dependencies from "grpc_deps" here?

bazel/grpc_extra_deps.bzl

@@ -20,6 +20,7 @@ load("@com_envoyproxy_protoc_gen_validate//:dependencies.bzl", "go_third_party")
 load("@com_google_googleapis//:repository_rules.bzl", "switched_rules_by_language")
 load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
 load("@envoy_api//bazel:repositories.bzl", "api_dependencies")
+load("@google_cloud_cpp//bazel:google_cloud_cpp_deps.bzl", "google_cloud_cpp_deps")
 load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
 load("@upb//bazel:workspace_deps.bzl", "upb_deps")
 
@@ -71,3 +72,5 @@ def grpc_extra_deps(ignore_version_differences = False):
         grpc = True,
         python = True,
     )
+
+    google_cloud_cpp_deps()

test/cpp/ext/gsm/BUILD

@@ -27,6 +27,7 @@ grpc_cc_test(
         "gsm_observability_test.cc",
     ],
     external_deps = [
+        "google_cloud_cpp:experimental-opentelemetry",
         "gtest",
         "otel/sdk/src/metrics",
     ],

test/cpp/ext/gsm/gsm_observability_test.cc

@@ -18,6 +18,7 @@
 
 #include "src/cpp/ext/gsm/gsm_observability.h"
 
+#include "google/cloud/opentelemetry/resource_detector.h"
 #include "gtest/gtest.h"
 
 #include "test/core/util/test_config.h"
@@ -32,6 +33,10 @@ TEST(GsmCustomObservabilityBuilderTest, Basic) {
       absl::UnimplementedError("Not Implemented"));
 }
 
+TEST(GsmDependencyTest, GoogleCloudOpenTelemetryDependency) {
+  EXPECT_NE(google::cloud::otel::MakeResourceDetector(), nullptr);
+}
+
 }  // namespace
 }  // namespace testing
 }  // namespace grpc

tools/distrib/fix_build_deps.py

@@ -93,6 +93,7 @@ EXTERNAL_DEPS = {
     "absl/types/variant.h": "absl/types:variant",
     "absl/utility/utility.h": "absl/utility",
     "address_sorting/address_sorting.h": "address_sorting",
+    "google/cloud/opentelemetry/resource_detector.h": "google_cloud_cpp:experimental-opentelemetry",
     "opentelemetry/context/context.h": "otel/api",
     "opentelemetry/metrics/meter.h": "otel/api",
     "opentelemetry/metrics/meter_provider.h": "otel/api",

tools/run_tests/sanity/check_bazel_workspace.py

@@ -78,6 +78,7 @@ _GRPC_DEP_NAMES = [
     "com_google_googleapis",
     "com_google_libprotobuf_mutator",
     "com_github_cncf_udpa",
+    "google_cloud_cpp",
 ]
 
 _GRPC_BAZEL_ONLY_DEPS = [
@@ -104,6 +105,7 @@ _GRPC_BAZEL_ONLY_DEPS = [
     "com_envoyproxy_protoc_gen_validate",
     "com_google_googleapis",
     "com_google_libprotobuf_mutator",
+    "google_cloud_cpp",
 ]