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server.cpp
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#include "server.h"
#include "config.h"
#include "client_storage_factory.h"
#include <cloud/blockstore/public/api/grpc/service.grpc.pb.h>
#include <cloud/blockstore/libs/diagnostics/config.h>
#include <cloud/blockstore/libs/diagnostics/critical_events.h>
#include <cloud/blockstore/libs/diagnostics/incomplete_requests.h>
#include <cloud/blockstore/libs/diagnostics/server_stats.h>
#include <cloud/blockstore/libs/service/context.h>
#include <cloud/blockstore/libs/service/request_helpers.h>
#include <cloud/blockstore/libs/service/request.h>
#include <cloud/blockstore/libs/service/service.h>
#include <cloud/storage/core/libs/common/error.h>
#include <cloud/storage/core/libs/common/thread.h>
#include <cloud/storage/core/libs/diagnostics/logging.h>
#include <cloud/storage/core/libs/grpc/auth_metadata.h>
#include <cloud/storage/core/libs/grpc/completion.h>
#include <cloud/storage/core/libs/grpc/credentials.h>
#include <cloud/storage/core/libs/grpc/executor.h>
#include <cloud/storage/core/libs/grpc/init.h>
#include <cloud/storage/core/libs/grpc/keepalive.h>
#include <cloud/storage/core/libs/grpc/time_point_specialization.h>
#include <cloud/storage/core/libs/grpc/utils.h>
#include <cloud/storage/core/libs/uds/client_storage.h>
#include <cloud/storage/core/libs/uds/endpoint_poller.h>
#include <contrib/ydb/library/actors/prof/tag.h>
#include <contrib/libs/grpc/include/grpcpp/completion_queue.h>
#include <contrib/libs/grpc/include/grpcpp/resource_quota.h>
#include <contrib/libs/grpc/include/grpcpp/security/auth_metadata_processor.h>
#include <contrib/libs/grpc/include/grpcpp/security/server_credentials.h>
#include <contrib/libs/grpc/include/grpcpp/server.h>
#include <contrib/libs/grpc/include/grpcpp/server_builder.h>
#include <contrib/libs/grpc/include/grpcpp/server_context.h>
#include <contrib/libs/grpc/include/grpcpp/server_posix.h>
#include <contrib/libs/grpc/include/grpcpp/support/status.h>
#include <util/datetime/cputimer.h>
#include <util/folder/path.h>
#include <util/generic/hash_set.h>
#include <util/generic/maybe.h>
#include <util/generic/string.h>
#include <util/generic/vector.h>
#include <util/network/init.h>
#include <util/stream/file.h>
#include <util/string/join.h>
#include <util/system/file.h>
#include <util/system/mutex.h>
#include <util/system/spinlock.h>
#include <util/system/thread.h>
namespace NCloud::NBlockStore::NServer {
using namespace NMonitoring;
using namespace NThreading;
namespace {
////////////////////////////////////////////////////////////////////////////////
namespace NHeaders {
const grpc::string ClientId = "x-nbs-client-id";
const grpc::string IdempotenceId = "x-nbs-idempotence-id";
const grpc::string RequestId = "x-nbs-request-id";
const grpc::string Timestamp = "x-nbs-timestamp";
const grpc::string TraceId = "x-nbs-trace-id";
const grpc::string RequestTimeout = "x-nbs-request-timeout";
}
////////////////////////////////////////////////////////////////////////////////
TString ReadFile(const TString& fileName)
{
TFileInput in(fileName);
return in.ReadAll();
}
////////////////////////////////////////////////////////////////////////////////
const TRequestSourceKinds RequestSourceKinds = {
{ "INSECURE_CONTROL_CHANNEL", NProto::SOURCE_INSECURE_CONTROL_CHANNEL },
{ "SECURE_CONTROL_CHANNEL", NProto::SOURCE_SECURE_CONTROL_CHANNEL },
{ "TCP_DATA_CHANNEL", NProto::SOURCE_TCP_DATA_CHANNEL },
{ "FD_DATA_CHANNEL", NProto::SOURCE_FD_DATA_CHANNEL },
{ "FD_CONTROL_CHANNEL", NProto::SOURCE_FD_CONTROL_CHANNEL },
};
////////////////////////////////////////////////////////////////////////////////
struct TServerRequestHandlerBase
: public NStorage::NGrpc::TRequestHandlerBase
{
TCallContextPtr CallContext = MakeIntrusive<TCallContext>();
TMetricRequest MetricRequest;
enum {
WaitingForRequest = 0,
ExecutingRequest = 1,
ExecutionCompleted = 2,
ExecutionCancelled = 3,
SendingResponse = 4,
RequestCompleted = 5,
};
TAtomic RequestState = WaitingForRequest;
NProto::TError Error;
TServerRequestHandlerBase(EBlockStoreRequest requestType)
: MetricRequest(requestType)
{}
};
////////////////////////////////////////////////////////////////////////////////
class TSessionStorage;
struct TAppContext
{
TServerAppConfigPtr Config;
ILoggingServicePtr Logging;
TLog Log;
IBlockStorePtr Service;
IBlockStorePtr UdsService;
std::unique_ptr<grpc::Server> Server;
std::shared_ptr<TSessionStorage> SessionStorage;
IServerStatsPtr ServerStats;
TAtomic ShouldStop = 0;
};
////////////////////////////////////////////////////////////////////////////////
using TRequestsInFlight =
NStorage::NGrpc::TRequestsInFlight<TServerRequestHandlerBase>;
using TExecutorContext = NStorage::NGrpc::
TExecutorContext<grpc::ServerCompletionQueue, TRequestsInFlight>;
using TExecutor = NStorage::NGrpc::TExecutor<
grpc::ServerCompletionQueue,
TRequestsInFlight,
TExecutorCounters::TExecutorScope>;
////////////////////////////////////////////////////////////////////////////////
template <typename TService>
constexpr bool IsDataService()
{
return false;
}
template <>
constexpr bool IsDataService<NProto::TBlockStoreDataService::AsyncService>()
{
return true;
}
////////////////////////////////////////////////////////////////////////////////
#define BLOCKSTORE_DECLARE_METHOD(name, ...) \
struct T##name##Method \
{ \
static constexpr EBlockStoreRequest Request = EBlockStoreRequest::name;\
\
using TRequest = NProto::T##name##Request; \
using TResponse = NProto::T##name##Response; \
\
template <typename T, typename ...TArgs> \
static void Prepare(T& service, TArgs&& ...args) \
{ \
service.Request##name(std::forward<TArgs>(args)...); \
} \
\
template <typename T, typename ...TArgs> \
static TFuture<TResponse> Execute(T& service, TArgs&& ...args) \
{ \
return service.name(std::forward<TArgs>(args)...); \
} \
}; \
// BLOCKSTORE_DECLARE_METHOD
BLOCKSTORE_GRPC_SERVICE(BLOCKSTORE_DECLARE_METHOD)
#undef BLOCKSTORE_DECLARE_METHOD
////////////////////////////////////////////////////////////////////////////////
using NCloud::NStorage::NServer::IClientStorage;
using NCloud::NStorage::NServer::IClientStoragePtr;
////////////////////////////////////////////////////////////////////////////////
class TSessionStorage;
IClientStoragePtr CreateEndpointClientStorage(
const std::shared_ptr<TSessionStorage>& sessionStorage,
IBlockStorePtr service);
////////////////////////////////////////////////////////////////////////////////
class TSessionStorage final
: public IClientStorageFactory
, public std::enable_shared_from_this<TSessionStorage>
{
struct TClientInfo
{
ui32 Fd = 0;
IBlockStorePtr Service;
NProto::ERequestSource Source = NProto::SOURCE_FD_DATA_CHANNEL;
};
private:
TAppContext& AppCtx;
TMutex Lock;
THashMap<ui32, TClientInfo> ClientInfos;
public:
TSessionStorage(TAppContext& appCtx)
: AppCtx(appCtx)
{}
void AddClient(
const TSocketHolder& socket,
IBlockStorePtr sessionService,
NProto::ERequestSource source)
{
if (AtomicGet(AppCtx.ShouldStop)) {
return;
}
TSocketHolder dupSocket;
with_lock (Lock) {
auto it = FindClient(socket);
Y_ABORT_UNLESS(it == ClientInfos.end());
// create duplicate socket. we poll socket to know when
// client disconnects and dupSocket is passed to GRPC to read
// messages.
dupSocket = SafeCreateDuplicate(socket);
auto client = TClientInfo {
(ui32)socket,
std::move(sessionService),
source
};
auto res = ClientInfos.emplace((ui32)dupSocket, std::move(client));
Y_ABORT_UNLESS(res.second);
}
TLog& Log = AppCtx.Log;
STORAGE_DEBUG("Accept client. Unix socket fd = " << (ui32)dupSocket);
grpc::AddInsecureChannelFromFd(AppCtx.Server.get(), dupSocket.Release());
}
void RemoveClient(const TSocketHolder& socket)
{
if (AtomicGet(AppCtx.ShouldStop)) {
return;
}
with_lock (Lock) {
auto it = FindClient(socket);
Y_ABORT_UNLESS(it != ClientInfos.end());
ClientInfos.erase(it);
}
}
IBlockStorePtr GetSessionService(ui32 fd, NProto::ERequestSource& source)
{
with_lock (Lock) {
auto it = ClientInfos.find(fd);
if (it != ClientInfos.end()) {
const auto& clientInfo = it->second;
source = clientInfo.Source;
return clientInfo.Service;
}
}
return nullptr;
}
IClientStoragePtr CreateClientStorage(IBlockStorePtr service)
{
return CreateEndpointClientStorage(
shared_from_this(),
std::move(service));
}
private:
static TSocketHolder CreateDuplicate(const TSocketHolder& socket)
{
auto fileHandle = TFileHandle(socket);
auto duplicateFd = fileHandle.Duplicate();
fileHandle.Release();
return TSocketHolder(duplicateFd);
}
// Grpc can release socket before we call RemoveClient. So it is possible
// to observe the situation when CreateDuplicate returns fd which was not
// yet removed from ClientInfo's. So completed RemoveClient will close fd
// related to another connection.
TSocketHolder SafeCreateDuplicate(const TSocketHolder& socket)
{
TList<TSocketHolder> holders;
while (true) {
TSocketHolder holder = CreateDuplicate(socket);
if (ClientInfos.find(holder) == ClientInfos.end()) {
return holder;
}
holders.push_back(std::move(holder));
}
}
THashMap<ui32, TClientInfo>::iterator FindClient(const TSocketHolder& socket)
{
ui32 fd = socket;
for (auto it = ClientInfos.begin(); it != ClientInfos.end(); ++it) {
const auto& clientInfo = it->second;
if (clientInfo.Fd == fd) {
return it;
}
}
return ClientInfos.end();
}
};
////////////////////////////////////////////////////////////////////////////////
class TClientStorage final
: public IClientStorage
{
std::shared_ptr<TSessionStorage> Storage;
IBlockStorePtr Service;
public:
TClientStorage(
std::shared_ptr<TSessionStorage> storage,
IBlockStorePtr service)
: Storage(std::move(storage))
, Service(std::move(service))
{}
void AddClient(
const TSocketHolder& clientSocket,
NCloud::NProto::ERequestSource source) override
{
Storage->AddClient(clientSocket, Service, source);
}
void RemoveClient(const TSocketHolder& clientSocket) override
{
Storage->RemoveClient(clientSocket);
}
};
IClientStoragePtr CreateEndpointClientStorage(
const std::shared_ptr<TSessionStorage>& sessionStorage,
IBlockStorePtr service)
{
return std::make_shared<TClientStorage>(
sessionStorage,
std::move(service));
}
////////////////////////////////////////////////////////////////////////////////
template<typename TMethod>
struct TRequestDataHolder
{};
template<>
struct TRequestDataHolder<TMountVolumeMethod>
{
TString ClientId;
TString InstanceId;
};
template<>
struct TRequestDataHolder<TUnmountVolumeMethod>
{
TString DiskId;
TString ClientId;
};
template<>
struct TRequestDataHolder<TAlterVolumeMethod>
{
TString DiskId;
TString CloudId;
TString FolderId;
};
////////////////////////////////////////////////////////////////////////////////
template <typename TService, typename TMethod>
class TRequestHandler final
: public TServerRequestHandlerBase
{
using TRequest = typename TMethod::TRequest;
using TResponse = typename TMethod::TResponse;
private:
TAppContext& AppCtx;
TExecutorContext& ExecCtx;
TService& Service;
std::unique_ptr<grpc::ServerContext> Context = std::make_unique<grpc::ServerContext>();
grpc::ServerAsyncResponseWriter<TResponse> Writer;
std::shared_ptr<TRequest> Request = std::make_shared<TRequest>();
TFuture<TResponse> Response;
static constexpr ui32 InvalidFd = INVALID_SOCKET;
ui32 SourceFd = InvalidFd;
IBlockStorePtr SessionService;
[[no_unique_address]] TRequestDataHolder<TMethod> DataHolder;
public:
TRequestHandler(
TExecutorContext& execCtx,
TAppContext& appCtx,
TService& service)
: TServerRequestHandlerBase(TMethod::Request)
, AppCtx(appCtx)
, ExecCtx(execCtx)
, Service(service)
, Writer(Context.get())
{}
static void Start(
TExecutorContext& execCtx,
TAppContext& appCtx,
TService& service)
{
using THandler = TRequestHandler<TService, TMethod>;
execCtx.StartRequestHandler<THandler>(appCtx, service);
}
void Process(bool ok) override
{
if (AtomicGet(AppCtx.ShouldStop) == 0 &&
AtomicGet(RequestState) == WaitingForRequest)
{
// There always should be handler waiting for request.
// Spawn new request only when handling request from server queue.
Start(ExecCtx, AppCtx, Service);
}
if (!ok) {
auto prevState = AtomicSwap(&RequestState, RequestCompleted);
if (prevState != WaitingForRequest) {
CompleteRequest();
}
}
for (;;) {
switch (AtomicGet(RequestState)) {
case WaitingForRequest:
if (AtomicCas(&RequestState, ExecutingRequest, WaitingForRequest)) {
// fix NBS-2490
if (AtomicGet(AppCtx.ShouldStop)) {
Cancel();
return;
}
PrepareRequestContext();
ExecuteRequest();
// request is in progress now
return;
}
break;
case ExecutionCompleted:
if (AtomicCas(&RequestState, SendingResponse, ExecutionCompleted)) {
try {
const auto& response = Response.GetValue();
// 'mute' fatal errors for stopped endpoints
if (HasError(response) && EndpointIsStopped()) {
SendResponse(TErrorResponse(E_GRPC_UNAVAILABLE, TStringBuilder()
<< "Endpoint has been stopped (fd = " << SourceFd << ")."
<< " Service error: " << response.GetError()));
} else {
SendResponse(response);
}
} catch (const TServiceError& e) {
SendResponse(GetErrorResponse(e));
} catch (...) {
SendResponse(GetErrorResponse(CurrentExceptionMessage()));
}
// request is in progress now
return;
}
break;
case ExecutionCancelled:
if (AtomicCas(&RequestState, SendingResponse, ExecutionCancelled)) {
// cancel inflight requests due to server shutting down
SendError(grpc::Status(
grpc::StatusCode::UNAVAILABLE,
"Server shutting down"));
// request is in progress now
return;
}
break;
case SendingResponse:
if (AtomicCas(&RequestState, RequestCompleted, SendingResponse)) {
CompleteRequest();
}
break;
case RequestCompleted:
// request completed and could be safely destroyed
ExecCtx.RequestsInFlight.Unregister(this);
// free grpc server context as soon as we completed request
// because request handler may be destructed later than
// grpc shutdown
Context.reset();
return;
}
}
}
void Cancel() override
{
if (AtomicCas(&RequestState, ExecutionCancelled, ExecutingRequest)) {
// will be processed on executor thread
EnqueueCompletion(ExecCtx.CompletionQueue.get(), AcquireCompletionTag());
return;
}
if (Context->c_call()) {
Context->TryCancel();
}
}
void PrepareRequest()
{
TMethod::Prepare(
Service,
Context.get(),
Request.get(),
&Writer,
ExecCtx.CompletionQueue.get(),
ExecCtx.CompletionQueue.get(),
this);
}
private:
void PrepareRequestContext()
{
auto& headers = *Request->MutableHeaders();
const auto& metadata = Context->client_metadata();
if (!metadata.empty()) {
if (auto value = GetMetadata(metadata, NHeaders::ClientId)) {
headers.SetClientId(TString{value});
}
if (auto value = GetMetadata(metadata, NHeaders::IdempotenceId)) {
headers.SetIdempotenceId(TString{value});
}
if (auto value = GetMetadata(metadata, NHeaders::TraceId)) {
headers.SetTraceId(TString{value});
}
if (auto value = GetMetadata(metadata, NHeaders::RequestId)) {
ui64 requestId;
if (TryFromString(value, requestId)) {
headers.SetRequestId(requestId);
}
}
if (auto value = GetMetadata(metadata, NHeaders::Timestamp)) {
ui64 timestamp;
if (TryFromString(value, timestamp)) {
headers.SetTimestamp(timestamp);
}
}
if (auto value = GetMetadata(metadata, NHeaders::RequestTimeout)) {
ui32 requestTimeout;
if (TryFromString(value, requestTimeout)) {
headers.SetRequestTimeout(requestTimeout);
}
}
}
auto now = TInstant::Now();
auto timestamp = TInstant::MicroSeconds(headers.GetTimestamp());
if (!timestamp || timestamp > now || now - timestamp > TDuration::Seconds(1)) {
// fix request timestamp
timestamp = now;
headers.SetTimestamp(timestamp.MicroSeconds());
}
auto requestTimeout = TDuration::MilliSeconds(headers.GetRequestTimeout());
if (!requestTimeout) {
requestTimeout = AppCtx.Config->GetRequestTimeout();
headers.SetRequestTimeout(requestTimeout.MilliSeconds());
}
CallContext->RequestId = headers.GetRequestId();
if (!CallContext->RequestId) {
CallContext->RequestId = CreateRequestId();
headers.SetRequestId(CallContext->RequestId);
}
auto clientId = GetClientId(*Request);
auto diskId = GetDiskId(*Request);
ui64 startIndex = 0;
ui64 requestBytes = 0;
if constexpr (IsReadWriteRequest(TMethod::Request)) {
startIndex = GetStartIndex(*Request);
requestBytes = CalculateBytesCount(
*Request,
AppCtx.ServerStats->GetBlockSize(diskId));
}
AppCtx.ServerStats->PrepareMetricRequest(
MetricRequest,
std::move(clientId),
std::move(diskId),
startIndex,
requestBytes,
false // unaligned
);
OnRequestPreparation(*Request, DataHolder);
}
void ValidateRequest()
{
auto authContext = Context->auth_context();
Y_ABORT_UNLESS(authContext);
auto source = GetRequestSource(*authContext, RequestSourceKinds);
if (!source) {
ui32 fd = 0;
auto peer = Context->peer();
bool result = TryParseSourceFd(peer, &fd);
if (!result) {
ythrow TServiceError(E_FAIL)
<< "failed to parse request source fd: " << peer;
}
auto src = NProto::SOURCE_FD_DATA_CHANNEL;
SessionService = AppCtx.SessionStorage->GetSessionService(fd, src);
if (SessionService == nullptr) {
ythrow TServiceError(E_GRPC_UNAVAILABLE)
<< "endpoint has been stopped (fd = " << fd << ").";
}
source = src;
SourceFd = fd;
}
const bool isDataChannel = IsDataChannel(*source);
const bool isDataService = IsDataService<TService>();
if (isDataChannel != isDataService) {
ythrow TServiceError(E_GRPC_UNIMPLEMENTED)
<< "mismatched request channel";
}
if (Request->GetHeaders().HasInternal()) {
ythrow TServiceError(E_ARGUMENT)
<< "internal field should not be set by client";
}
if (*source == NProto::SOURCE_TCP_DATA_CHANNEL &&
TMethod::Request != EBlockStoreRequest::UploadClientMetrics)
{
ythrow TServiceError(E_ARGUMENT)
<< "unsupported request in tcp data channel: "
<< GetBlockStoreRequestName(TMethod::Request).Quote();
}
auto& internal = *Request->MutableHeaders()->MutableInternal();
internal.Clear();
internal.SetRequestSource(*source);
// we will only get token from secure control channel
if (source == NProto::SOURCE_SECURE_CONTROL_CHANNEL) {
internal.SetAuthToken(GetAuthToken(Context->client_metadata()));
}
}
bool EndpointIsStopped() const
{
if (SourceFd == InvalidFd) {
return false;
}
NProto::ERequestSource source;
auto service = AppCtx.SessionStorage->GetSessionService(SourceFd, source);
return service == nullptr;
}
void ExecuteRequest()
{
TString message;
if (IsControlRequest(MetricRequest.RequestType)) {
message = TStringBuilder() << *Request;
}
AppCtx.ServerStats->RequestStarted(
AppCtx.Log,
MetricRequest,
*CallContext,
message);
try {
ValidateRequest();
Response = TMethod::Execute(
SessionService ? *SessionService : *AppCtx.Service,
CallContext,
std::move(Request));
} catch (const TServiceError& e) {
Response = MakeFuture(GetErrorResponse(e));
} catch (...) {
Response = MakeFuture(GetErrorResponse(CurrentExceptionMessage()));
}
auto* tag = AcquireCompletionTag();
Response.Subscribe(
[=] (const auto& response) {
Y_UNUSED(response);
if (AtomicCas(&RequestState, ExecutionCompleted, ExecutingRequest)) {
// will be processed on executor thread
EnqueueCompletion(ExecCtx.CompletionQueue.get(), tag);
return;
}
ReleaseCompletionTag();
});
}
void SendResponse(const TResponse& response)
{
if (response.HasError()) {
Error = response.GetError();
}
OnRequestCompletion(response, DataHolder);
AppCtx.ServerStats->ResponseSent(MetricRequest, *CallContext);
Writer.Finish(response, grpc::Status::OK, AcquireCompletionTag());
}
void SendError(const grpc::Status& status)
{
Error.SetCode(MAKE_GRPC_ERROR(status.error_code()));
Error.SetMessage(ToString(status.error_message()));
AppCtx.ServerStats->ResponseSent(MetricRequest, *CallContext);
Writer.FinishWithError(status, AcquireCompletionTag());
}
void CompleteRequest()
{
AppCtx.ServerStats->RequestCompleted(
AppCtx.Log,
MetricRequest,
*CallContext,
Error);
}
static TStringBuf GetMetadata(
const std::multimap<grpc::string_ref, grpc::string_ref>& metadata,
const grpc::string_ref& key)
{
auto it = metadata.find(key);
if (it != metadata.end()) {
return { it->second.data(), it->second.size() };
}
return {};
}
static TResponse GetErrorResponse(const TServiceError& e)
{
TResponse response;
auto& error = *response.MutableError();
error.SetCode(e.GetCode());
error.SetMessage(e.what());
return response;
}
static TResponse GetErrorResponse(TString message)
{
TResponse response;
auto& error = *response.MutableError();
error.SetCode(E_FAIL);
error.SetMessage(std::move(message));
return response;
}
template <typename T>
void OnRequestPreparation(const TRequest& request, T& data)
{
Y_UNUSED(request);
Y_UNUSED(data);
}
template <>
void OnRequestPreparation(
const TRequest& request,
TRequestDataHolder<TMountVolumeMethod>& data)
{
data.ClientId = GetClientId(request);
data.InstanceId = request.GetInstanceId();
}
template <>
void OnRequestPreparation(
const TRequest& request,
TRequestDataHolder<TUnmountVolumeMethod>& data)
{
data.ClientId = GetClientId(request);
data.DiskId = request.GetDiskId();
}
template <>
void OnRequestPreparation(
const TRequest& request,
TRequestDataHolder<TAlterVolumeMethod>& data)
{
data.DiskId = request.GetDiskId();
data.CloudId = request.GetCloudId();
data.FolderId = request.GetFolderId();
}
template <typename T>
void OnRequestCompletion(const TResponse& response, T& data)
{
Y_UNUSED(response);
Y_UNUSED(data);
}
template <>
void OnRequestCompletion(
const TResponse& response,
TRequestDataHolder<TMountVolumeMethod>& data)
{
if (!HasError(response) && response.HasVolume()) {
AppCtx.ServerStats->MountVolume(
response.GetVolume(),
data.ClientId,
data.InstanceId);
}
}
template <>
void OnRequestCompletion(
const TResponse& response,
TRequestDataHolder<TAlterVolumeMethod>& data)
{
if (!HasError(response)) {
AppCtx.ServerStats->AlterVolume(
data.DiskId,
data.CloudId,
data.FolderId);
}
}
template <>
void OnRequestCompletion(
const TResponse& response,
TRequestDataHolder<TUnmountVolumeMethod>& data)
{
if (!HasError(response)) {
AppCtx.ServerStats->UnmountVolume(data.DiskId, data.ClientId);
}
}
};
////////////////////////////////////////////////////////////////////////////////
class TServer final
: public TAppContext
, public IServer
{
private:
TGrpcInitializer GrpcInitializer;
NProto::TBlockStoreService::AsyncService ControlService;
NProto::TBlockStoreDataService::AsyncService DataService;
TVector<std::unique_ptr<TExecutor>> Executors;
std::unique_ptr<NStorage::NServer::TEndpointPoller> EndpointPoller;
public:
TServer(
TServerAppConfigPtr config,
ILoggingServicePtr logging,
IServerStatsPtr serverStats,
IBlockStorePtr service,
IBlockStorePtr udsService);
~TServer() override;
void Start() override;
void Stop() override;
IClientStorageFactoryPtr GetClientStorageFactory() override;
size_t CollectRequests(
const TIncompleteRequestsCollector& collector) override;
private:
template <typename TMethod, typename TService>
void StartRequest(TService& service);
void StartRequests();
grpc::SslServerCredentialsOptions CreateSslOptions();
void StartListenUnixSocket(const TString& unixSocketPath, ui32 backlog);
void StopListenUnixSocket();
};
////////////////////////////////////////////////////////////////////////////////
TServer::TServer(
TServerAppConfigPtr config,
ILoggingServicePtr logging,
IServerStatsPtr serverStats,
IBlockStorePtr service,
IBlockStorePtr udsService)
{
Config = std::move(config);
Log = logging->CreateLog("BLOCKSTORE_SERVER");
Logging = std::move(logging);
ServerStats = std::move(serverStats);
Service = std::move(service);
UdsService = std::move(udsService);
SessionStorage = std::make_shared<TSessionStorage>(*this);
}
TServer::~TServer()
{
Stop();
}
void TServer::Start()
{
grpc::ServerBuilder builder;
builder.RegisterService(&ControlService);
builder.RegisterService(&DataService);
ui32 maxMessageSize = Config->GetMaxMessageSize();
if (maxMessageSize) {
builder.SetMaxSendMessageSize(maxMessageSize);
builder.SetMaxReceiveMessageSize(maxMessageSize);
}
ui32 memoryQuotaBytes = Config->GetMemoryQuotaBytes();
if (memoryQuotaBytes) {
grpc::ResourceQuota quota("memory_bound");
quota.Resize(memoryQuotaBytes);
builder.SetResourceQuota(quota);
}
if (Config->GetKeepAliveEnabled()) {
builder.SetOption(std::make_unique<TKeepAliveOption>(
Config->GetKeepAliveIdleTimeout(),
Config->GetKeepAliveProbeTimeout(),
Config->GetKeepAliveProbesCount()));
}