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localstack_test.cc
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localstack_test.cc
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// Copyright 2023 The TensorStore 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.
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include "absl/flags/flag.h"
#include "absl/log/absl_check.h"
#include "absl/log/absl_log.h"
#include "absl/status/status.h"
#include "absl/strings/cord.h"
#include "absl/strings/match.h"
#include "absl/strings/str_format.h"
#include "absl/time/clock.h"
#include "absl/time/time.h"
#include <nlohmann/json.hpp>
#include "tensorstore/context.h"
#include "tensorstore/internal/env.h"
#include "tensorstore/internal/http/curl_transport.h"
#include "tensorstore/internal/http/http_response.h"
#include "tensorstore/internal/http/http_transport.h"
#include "tensorstore/internal/http/transport_test_utils.h"
#include "tensorstore/internal/json_gtest.h"
#include "tensorstore/internal/os/subprocess.h"
#include "tensorstore/json_serialization_options_base.h"
#include "tensorstore/kvstore/batch_util.h"
#include "tensorstore/kvstore/kvstore.h"
#include "tensorstore/kvstore/s3/credentials/environment_credential_provider.h"
#include "tensorstore/kvstore/s3/s3_request_builder.h"
#include "tensorstore/kvstore/spec.h"
#include "tensorstore/kvstore/test_util.h"
#include "tensorstore/util/future.h"
#include "tensorstore/util/result.h"
#include "tensorstore/util/status.h"
#include "tensorstore/util/status_testutil.h"
// When provided with --localstack_binary, localstack_test will start
// localstack in host mode (via package localstack[runtime]).
//
// When provided with --localstack_endpoint, localstack_test will connect
// to a running localstack instance.
ABSL_FLAG(std::string, localstack_endpoint, "", "Localstack endpoint");
ABSL_FLAG(std::string, localstack_binary, "", "Path to the localstack");
// --localstack_timeout is the time the process will wait for localstack.
ABSL_FLAG(absl::Duration, localstack_timeout, absl::Seconds(15),
"Time to wait for localstack process to start serving requests");
// --host_header can override the host: header used for signing.
// It can be, for example, s3.us-east-1.localstack.localhost.com
ABSL_FLAG(std::string, host_header, "", "Host header to use for signing");
// --binary_mode selects whether the `--localstack_binary` is localstack
// binary or whether it is a moto binary.
ABSL_FLAG(std::string, binary_mode, "",
"Selects options for starting --localstack_binary. Valid values are "
"[moto]. Assumes localstack otherwise.");
// AWS bucket, region, and path.
ABSL_FLAG(std::string, aws_bucket, "testbucket",
"The S3 bucket used for the test.");
ABSL_FLAG(std::string, aws_region, "us-east-1",
"The S3 region used for the test.");
ABSL_FLAG(std::string, aws_path, "tensorstore/test/",
"The S3 path used for the test.");
namespace kvstore = ::tensorstore::kvstore;
using ::tensorstore::Context;
using ::tensorstore::MatchesJson;
using ::tensorstore::internal::GetEnvironmentMap;
using ::tensorstore::internal::SetEnv;
using ::tensorstore::internal::SpawnSubprocess;
using ::tensorstore::internal::Subprocess;
using ::tensorstore::internal::SubprocessOptions;
using ::tensorstore::internal_http::GetDefaultHttpTransport;
using ::tensorstore::internal_http::HttpResponse;
using ::tensorstore::internal_http::IssueRequestOptions;
using ::tensorstore::internal_kvstore_s3::EnvironmentCredentialProvider;
using ::tensorstore::internal_kvstore_s3::S3RequestBuilder;
using ::tensorstore::transport_test_utils::TryPickUnusedPort;
namespace {
// localstack account id 42
static constexpr char kAwsAccessKeyId[] = "LSIAQAAAAAAVNCBMPNSG";
static constexpr char kAwsSecretKeyId[] = "localstackdontcare";
/// sha256 hash of an empty string
static constexpr char kEmptySha256[] =
"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855";
std::string Bucket() { return absl::GetFlag(FLAGS_aws_bucket); }
std::string Region() { return absl::GetFlag(FLAGS_aws_region); }
std::string Path() { return absl::GetFlag(FLAGS_aws_path); }
SubprocessOptions SetupLocalstackOptions(int http_port) {
// See https://docs.localstack.cloud/references/configuration/
// for the allowed environment variables for localstack.
SubprocessOptions options{absl::GetFlag(FLAGS_localstack_binary),
{"start", "--host"}};
options.env.emplace(GetEnvironmentMap());
auto& env = *options.env;
env["GATEWAY_LISTEN"] = absl::StrFormat("localhost:%d", http_port);
env["LOCALSTACK_HOST"] =
absl::StrFormat("localhost.localstack.cloud:%d", http_port);
env["SERVICES"] = "s3";
env["AWS_DEFAULT_REGION"] = Region();
return options;
}
SubprocessOptions SetupMotoOptions(int http_port) {
// See https://docs.getmoto.org/en/latest/docs/getting_started.html
// and https://docs.getmoto.org/en/latest/docs/server_mode.html
SubprocessOptions options{absl::GetFlag(FLAGS_localstack_binary),
{absl::StrFormat("-p%d", http_port)}};
options.env.emplace(GetEnvironmentMap());
auto& env = *options.env;
ABSL_CHECK(!Region().empty());
env["AWS_DEFAULT_REGION"] = Region();
return options;
}
// NOTE: Support minio as well, which needs temporary directories.
// https://min.io/docs/minio/linux/reference/minio-server/minio-server.html
// minio server --address :12123 /tmp/minio
class LocalStackProcess {
public:
LocalStackProcess() = default;
~LocalStackProcess() { StopProcess(); }
void SpawnProcess() {
if (child_) return;
const auto start_child = [this] {
http_port = TryPickUnusedPort().value_or(0);
ABSL_CHECK(http_port > 0);
SubprocessOptions options = //
(absl::GetFlag(FLAGS_binary_mode) == "moto")
? SetupMotoOptions(http_port)
: SetupLocalstackOptions(http_port);
ABSL_LOG(INFO) << "Spawning: " << endpoint_url();
absl::SleepFor(absl::Milliseconds(10));
TENSORSTORE_CHECK_OK_AND_ASSIGN(auto spawn_proc,
SpawnSubprocess(options));
return spawn_proc;
};
Subprocess spawn_proc = start_child();
// Give the child process several seconds to start.
auto deadline = absl::Now() + absl::Seconds(10);
while (absl::Now() < deadline) {
absl::SleepFor(absl::Milliseconds(250));
auto join_result = spawn_proc.Join(/*block=*/false);
if (join_result.ok()) {
// Process has terminated. Restart.
spawn_proc = start_child();
continue;
} else if (absl::IsUnavailable(join_result.status())) {
// Child is running.
child_.emplace(std::move(spawn_proc));
return;
}
// TODO: Also check the http port?
}
// Deadline has expired & there's nothing to show for it.
ABSL_LOG(FATAL) << "Failed to start process";
}
void StopProcess() {
if (child_) {
child_->Kill().IgnoreError();
auto join_result = child_->Join();
if (!join_result.ok()) {
ABSL_LOG(ERROR) << "Joining storage_testbench subprocess failed: "
<< join_result.status();
}
}
}
std::string endpoint_url() {
return absl::StrFormat("http://localhost:%d", http_port);
}
int http_port = 0;
std::optional<Subprocess> child_;
};
Context DefaultTestContext() {
// Opens the s3 driver with small exponential backoff values.
return Context{Context::Spec::FromJson({{"s3_request_retries",
{{"max_retries", 3},
{"initial_delay", "1ms"},
{"max_delay", "10ms"}}}})
.value()};
}
class LocalStackFixture : public ::testing::Test {
protected:
static LocalStackProcess process;
static void SetUpTestSuite() {
// Ensure that environment credentials are installed.
if (!EnvironmentCredentialProvider{}.GetCredentials().ok()) {
ABSL_LOG(INFO) << "Installing environment credentials AWS_ACCESS_KEY_ID="
<< kAwsAccessKeyId
<< " AWS_SECRET_ACCESS_KEY=" << kAwsSecretKeyId;
SetEnv("AWS_ACCESS_KEY_ID", kAwsAccessKeyId);
SetEnv("AWS_SECRET_ACCESS_KEY", kAwsSecretKeyId);
TENSORSTORE_CHECK_OK(EnvironmentCredentialProvider{}.GetCredentials());
}
ABSL_CHECK(!Bucket().empty());
if (absl::GetFlag(FLAGS_localstack_endpoint).empty()) {
ABSL_CHECK(!absl::GetFlag(FLAGS_localstack_binary).empty());
process.SpawnProcess();
}
if (!absl::StrContains(absl::GetFlag(FLAGS_localstack_endpoint),
"amazonaws.com")) {
// Only try to create the bucket when not connecting to aws.
ABSL_CHECK(!Region().empty());
MaybeCreateBucket();
} else {
ABSL_LOG(INFO) << "localstack_test connecting to Amazon using bucket:"
<< Bucket();
}
}
static void TearDownTestSuite() { process.StopProcess(); }
static std::string endpoint_url() {
if (absl::GetFlag(FLAGS_localstack_endpoint).empty()) {
return process.endpoint_url();
}
return absl::GetFlag(FLAGS_localstack_endpoint);
}
// Attempts to create the kBucket bucket on the localstack host.
static void MaybeCreateBucket() {
// Location constraints must not be provided for us-east-1
// https://docs.aws.amazon.com/AmazonS3/latest/API/API_CreateBucket.html
absl::Cord value;
if (Region() != "us-east-1") {
value = absl::Cord{absl::StrFormat(
R"(<?xml version="1.0" encoding="UTF-8"?>)"
R"(<CreateBucketConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">)"
R"(<LocationConstraint>%s</LocationConstraint>)"
R"(</CreateBucketConfiguration>)",
Region())};
}
auto request =
S3RequestBuilder("PUT",
absl::StrFormat("%s/%s", endpoint_url(), Bucket()))
.BuildRequest(
absl::GetFlag(FLAGS_host_header),
EnvironmentCredentialProvider{}.GetCredentials().value(),
Region(), kEmptySha256, absl::Now());
ABSL_LOG(INFO) << "Create bucket request: " << request;
::tensorstore::Future<HttpResponse> response;
// Repeat until available, up to `--localstack_timeout` seconds (about 15).
for (auto deadline = absl::Now() + absl::GetFlag(FLAGS_localstack_timeout);
absl::Now() < deadline;) {
absl::SleepFor(absl::Milliseconds(250));
response = GetDefaultHttpTransport()->IssueRequest(
request, IssueRequestOptions(value)
.SetRequestTimeout(absl::Seconds(15))
.SetConnectTimeout(absl::Seconds(15)));
// Failed to make the request; retry.
if (response.status().ok() || !absl::IsUnavailable(response.status())) {
break;
}
}
// Log the response, but don't fail the process on error.
if (!response.status().ok()) {
ABSL_LOG(INFO) << "Create bucket error: " << response.status();
} else {
ABSL_LOG(INFO) << "Create bucket response: " << Bucket() << " "
<< response.value() << "\n"
<< response.value().payload;
}
}
};
LocalStackProcess LocalStackFixture::process;
TEST_F(LocalStackFixture, Basic) {
auto context = DefaultTestContext();
::nlohmann::json json_spec{
{"driver", "s3"}, //
{"bucket", Bucket()}, //
{"endpoint", endpoint_url()}, //
{"path", Path()}, //
};
if (!Region().empty()) {
json_spec["aws_region"] = Region();
}
if (!absl::GetFlag(FLAGS_host_header).empty()) {
json_spec["host_header"] = absl::GetFlag(FLAGS_host_header);
}
TENSORSTORE_ASSERT_OK_AND_ASSIGN(auto store,
kvstore::Open(json_spec, context).result());
TENSORSTORE_ASSERT_OK_AND_ASSIGN(auto spec, store.spec());
EXPECT_THAT(spec.ToJson(tensorstore::IncludeDefaults{false}),
::testing::Optional(MatchesJson(json_spec)));
tensorstore::internal::TestKeyValueReadWriteOps(store);
}
TEST_F(LocalStackFixture, BatchRead) {
auto context = DefaultTestContext();
::nlohmann::json json_spec{
{"driver", "s3"}, //
{"bucket", Bucket()}, //
{"endpoint", endpoint_url()}, //
{"path", Path()}, //
};
if (!Region().empty()) {
json_spec["aws_region"] = Region();
}
if (!absl::GetFlag(FLAGS_host_header).empty()) {
json_spec["host_header"] = absl::GetFlag(FLAGS_host_header);
}
TENSORSTORE_ASSERT_OK_AND_ASSIGN(auto store,
kvstore::Open(json_spec, context).result());
tensorstore::internal::BatchReadGenericCoalescingTestOptions options;
options.coalescing_options = tensorstore::internal_kvstore_batch::
kDefaultRemoteStorageCoalescingOptions;
options.metric_prefix = "/tensorstore/kvstore/s3/";
tensorstore::internal::TestBatchReadGenericCoalescing(store, options);
}
} // namespace