Add GCP KMS example POC to test the CI

CMakeLists.txt

@@ -157,7 +157,7 @@ endif()
 no_warning(enum-constexpr-conversion) # breaks Protobuf in clang-16
 
 option(ENABLE_TESTS "Provide unit_test_dbms target with Google.Test unit tests" ON)
-option(ENABLE_EXAMPLES "Build all example programs in 'examples' subdirectories" OFF)
+option(ENABLE_EXAMPLES "Build all example programs in 'examples' subdirectories" ON)
 option(ENABLE_BENCHMARKS "Build all benchmark programs in 'benchmarks' subdirectories" OFF)
 
 if (OS_LINUX AND (ARCH_AMD64 OR ARCH_AARCH64) AND NOT USE_MUSL)

src/IO/examples/CMakeLists.txt

@@ -73,6 +73,9 @@ target_link_libraries (snappy_read_buffer PRIVATE clickhouse_common_io clickhous
 clickhouse_add_executable (hadoop_snappy_read_buffer hadoop_snappy_read_buffer.cpp)
 target_link_libraries (hadoop_snappy_read_buffer PRIVATE clickhouse_common_io clickhouse_common_config)
 
+clickhouse_add_executable (gcp_kms gcp_kms.cpp)
+target_link_libraries (gcp_kms PRIVATE dbms)
+
 if (TARGET ch_contrib::hdfs)
     clickhouse_add_executable (read_buffer_from_hdfs read_buffer_from_hdfs.cpp)
     target_link_libraries (read_buffer_from_hdfs PRIVATE dbms ch_contrib::hdfs)

src/IO/examples/gcp_kms.cpp

@@ -0,0 +1,57 @@
+#include <string>
+
+#include <Common/Base64.h>
+#include <Core/Settings.h>
+#include <Interpreters/Context.h>
+#include <IO/S3/AWSLogger.h>
+#include <IO/S3/Credentials.h>
+#include <IO/S3/PocoHTTPClient.h>
+#include <IO/S3/PocoHTTPClientFactory.h>
+#include <IO/S3Common.h>
+#include <Poco/ConsoleChannel.h>
+#include <Poco/Logger.h>
+
+#include <Common/Logger.h>
+#include <Common/logger_useful.h>
+#include <base/scope_guard.h>
+
+#include "google/cloud/kms/v1/key_management_client.h"
+#include "google/cloud/location.h"
+#include "google/cloud/status.h"
+
+using namespace DB;
+using namespace S3;
+
+int main(int argc, char * argv[])
+{
+    auto shared_context = Context::createShared();
+    auto global_context = Context::createGlobal(shared_context.get());
+    global_context->makeGlobalContext();
+
+    Poco::AutoPtr<Poco::ConsoleChannel> channel(new Poco::ConsoleChannel(std::cerr));
+    Poco::Logger::root().setChannel(channel);
+    Poco::Logger::root().setLevel("debug");
+
+    auto logger = getLogger("PMO");
+    LOG_DEBUG(logger, "GCP KMS testing...");
+
+    if (argc != 3)
+    {
+        std::cerr << "Usage: " << argv[0] << " project-id location-id\n";
+        return 1;
+    }
+
+    auto const location = google::cloud::Location(argv[1], argv[2]);
+
+    namespace kms = ::google::cloud::kms_v1;
+    auto client = kms::KeyManagementServiceClient(
+        kms::MakeKeyManagementServiceConnection());
+
+    for (auto kr : client.ListKeyRings(location.FullName()))
+    {
+        if (!kr) throw std::runtime_error(std::move(kr).status().message());
+        std::cout << kr->DebugString() << "\n";
+    }
+
+    return 0;
+}