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129fc27941
ClickHouse/programs/server/Server.cpp
Han Fei 116055b532 refine load part logic
2024-05-08 15:04:16 +02:00

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#include "Server.h"
#include <memory>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <pwd.h>
#include <unistd.h>
#include <Poco/Net/HTTPServer.h>
#include <Poco/Net/NetException.h>
#include <Poco/Util/HelpFormatter.h>
#include <Poco/Environment.h>
#include <Common/scope_guard_safe.h>
#include <Common/logger_useful.h>
#include <base/phdr_cache.h>
#include <Common/ErrorHandlers.h>
#include <base/getMemoryAmount.h>
#include <base/getAvailableMemoryAmount.h>
#include <base/errnoToString.h>
#include <base/coverage.h>
#include <base/getFQDNOrHostName.h>
#include <base/safeExit.h>
#include <Common/PoolId.h>
#include <Common/MemoryTracker.h>
#include <Common/ClickHouseRevision.h>
#include <Common/DNSResolver.h>
#include <Common/CgroupsMemoryUsageObserver.h>
#include <Common/CurrentMetrics.h>
#include <Common/ConcurrencyControl.h>
#include <Common/Macros.h>
#include <Common/ShellCommand.h>
#include <Common/ZooKeeper/ZooKeeper.h>
#include <Common/ZooKeeper/ZooKeeperNodeCache.h>
#include <Common/formatReadable.h>
#include <Common/getMultipleKeysFromConfig.h>
#include <Common/getNumberOfPhysicalCPUCores.h>
#include <Common/getExecutablePath.h>
#include <Common/ProfileEvents.h>
#include <Common/Scheduler/IResourceManager.h>
#include <Common/ThreadProfileEvents.h>
#include <Common/ThreadStatus.h>
#include <Common/getMappedArea.h>
#include <Common/remapExecutable.h>
#include <Common/TLDListsHolder.h>
#include <Common/Config/AbstractConfigurationComparison.h>
#include <Common/assertProcessUserMatchesDataOwner.h>
#include <Common/makeSocketAddress.h>
#include <Common/FailPoint.h>
#include <Common/CPUID.h>
#include <Common/HTTPConnectionPool.h>
#include <Server/waitServersToFinish.h>
#include <Interpreters/Cache/FileCacheFactory.h>
#include <Core/ServerUUID.h>
#include <IO/ReadHelpers.h>
#include <IO/ReadBufferFromFile.h>
#include <IO/SharedThreadPools.h>
#include <IO/UseSSL.h>
#include <Interpreters/ServerAsynchronousMetrics.h>
#include <Interpreters/DDLWorker.h>
#include <Interpreters/DNSCacheUpdater.h>
#include <Interpreters/DatabaseCatalog.h>
#include <Interpreters/ExternalDictionariesLoader.h>
#include <Interpreters/ProcessList.h>
#include <Interpreters/loadMetadata.h>
#include <Interpreters/registerInterpreters.h>
#include <Interpreters/JIT/CompiledExpressionCache.h>
#include <Access/AccessControl.h>
#include <Storages/StorageReplicatedMergeTree.h>
#include <Storages/System/attachSystemTables.h>
#include <Storages/System/attachInformationSchemaTables.h>
#include <Storages/Cache/ExternalDataSourceCache.h>
#include <Storages/Cache/registerRemoteFileMetadatas.h>
#include <Common/NamedCollections/NamedCollectionUtils.h>
#include <AggregateFunctions/registerAggregateFunctions.h>
#include <Functions/UserDefined/IUserDefinedSQLObjectsStorage.h>
#include <Functions/registerFunctions.h>
#include <TableFunctions/registerTableFunctions.h>
#include <Formats/registerFormats.h>
#include <Storages/registerStorages.h>
#include <Databases/registerDatabases.h>
#include <Dictionaries/registerDictionaries.h>
#include <Disks/registerDisks.h>
#include <Common/Scheduler/Nodes/registerSchedulerNodes.h>
#include <Common/Scheduler/Nodes/registerResourceManagers.h>
#include <Common/Config/ConfigReloader.h>
#include <Server/HTTPHandlerFactory.h>
#include "MetricsTransmitter.h"
#include <Common/StatusFile.h>
#include <Server/TCPHandlerFactory.h>
#include <Server/TCPServer.h>
#include <Common/SensitiveDataMasker.h>
#include <Common/ThreadFuzzer.h>
#include <Common/getHashOfLoadedBinary.h>
#include <Common/filesystemHelpers.h>
#include <Compression/CompressionCodecEncrypted.h>
#include <Server/HTTP/HTTPServerConnectionFactory.h>
#include <Server/MySQLHandlerFactory.h>
#include <Server/PostgreSQLHandlerFactory.h>
#include <Server/ProxyV1HandlerFactory.h>
#include <Server/TLSHandlerFactory.h>
#include <Server/ProtocolServerAdapter.h>
#include <Server/KeeperReadinessHandler.h>
#include <Server/HTTP/HTTPServer.h>
#include <Server/CloudPlacementInfo.h>
#include <Interpreters/AsynchronousInsertQueue.h>
#include <Core/ServerSettings.h>
#include <filesystem>
#include <unordered_set>
#include "config.h"
#include <Common/config_version.h>
#if defined(OS_LINUX)
# include <cstdlib>
# include <sys/un.h>
# include <sys/mman.h>
# include <sys/ptrace.h>
# include <Common/hasLinuxCapability.h>
#endif
#if USE_SSL
# include <Poco/Net/SecureServerSocket.h>
# include <Server/CertificateReloader.h>
#endif
#if USE_GRPC
# include <Server/GRPCServer.h>
#endif
#if USE_NURAFT
# include <Coordination/FourLetterCommand.h>
# include <Server/KeeperTCPHandlerFactory.h>
#endif
#if USE_JEMALLOC
# include <jemalloc/jemalloc.h>
#endif
#if USE_AZURE_BLOB_STORAGE
# include <azure/storage/common/internal/xml_wrapper.hpp>
# include <azure/core/diagnostics/logger.hpp>
#endif
#include <incbin.h>
/// A minimal file used when the server is run without installation
INCBIN(resource_embedded_xml, SOURCE_DIR "/programs/server/embedded.xml");
namespace CurrentMetrics
{
extern const Metric Revision;
extern const Metric VersionInteger;
extern const Metric MemoryTracking;
extern const Metric MergesMutationsMemoryTracking;
extern const Metric MaxDDLEntryID;
extern const Metric MaxPushedDDLEntryID;
}
namespace ProfileEvents
{
extern const Event MainConfigLoads;
extern const Event ServerStartupMilliseconds;
extern const Event InterfaceNativeSendBytes;
extern const Event InterfaceNativeReceiveBytes;
extern const Event InterfaceHTTPSendBytes;
extern const Event InterfaceHTTPReceiveBytes;
extern const Event InterfacePrometheusSendBytes;
extern const Event InterfacePrometheusReceiveBytes;
extern const Event InterfaceInterserverSendBytes;
extern const Event InterfaceInterserverReceiveBytes;
extern const Event InterfaceMySQLSendBytes;
extern const Event InterfaceMySQLReceiveBytes;
extern const Event InterfacePostgreSQLSendBytes;
extern const Event InterfacePostgreSQLReceiveBytes;
}
namespace fs = std::filesystem;
#if USE_JEMALLOC
static bool jemallocOptionEnabled(const char *name)
{
bool value;
size_t size = sizeof(value);
if (mallctl(name, reinterpret_cast<void *>(&value), &size, /* newp= */ nullptr, /* newlen= */ 0))
throw Poco::SystemException("mallctl() failed");
return value;
}
#else
static bool jemallocOptionEnabled(const char *) { return false; }
#endif
int mainEntryClickHouseServer(int argc, char ** argv)
{
DB::Server app;
if (jemallocOptionEnabled("opt.background_thread"))
{
LOG_ERROR(&app.logger(),
"jemalloc.background_thread was requested, "
"however ClickHouse uses percpu_arena and background_thread most likely will not give any benefits, "
"and also background_thread is not compatible with ClickHouse watchdog "
"(that can be disabled with CLICKHOUSE_WATCHDOG_ENABLE=0)");
}
/// Do not fork separate process from watchdog if we attached to terminal.
/// Otherwise it breaks gdb usage.
/// Can be overridden by environment variable (cannot use server config at this moment).
if (argc > 0)
{
const char * env_watchdog = getenv("CLICKHOUSE_WATCHDOG_ENABLE"); // NOLINT(concurrency-mt-unsafe)
if (env_watchdog)
{
if (0 == strcmp(env_watchdog, "1"))
app.shouldSetupWatchdog(argv[0]);
/// Other values disable watchdog explicitly.
}
else if (!isatty(STDIN_FILENO) && !isatty(STDOUT_FILENO) && !isatty(STDERR_FILENO))
app.shouldSetupWatchdog(argv[0]);
}
try
{
return app.run(argc, argv);
}
catch (...)
{
std::cerr << DB::getCurrentExceptionMessage(true) << "\n";
auto code = DB::getCurrentExceptionCode();
return code ? code : 1;
}
}
namespace DB
{
namespace ErrorCodes
{
extern const int NO_ELEMENTS_IN_CONFIG;
extern const int SUPPORT_IS_DISABLED;
extern const int ARGUMENT_OUT_OF_BOUND;
extern const int EXCESSIVE_ELEMENT_IN_CONFIG;
extern const int INVALID_CONFIG_PARAMETER;
extern const int NETWORK_ERROR;
extern const int CORRUPTED_DATA;
}
static std::string getCanonicalPath(std::string && path)
{
Poco::trimInPlace(path);
if (path.empty())
throw Exception(ErrorCodes::INVALID_CONFIG_PARAMETER, "path configuration parameter is empty");
if (path.back() != '/')
path += '/';
return std::move(path);
}
Poco::Net::SocketAddress Server::socketBindListen(
const Poco::Util::AbstractConfiguration & config,
Poco::Net::ServerSocket & socket,
const std::string & host,
UInt16 port,
[[maybe_unused]] bool secure) const
{
auto address = makeSocketAddress(host, port, &logger());
socket.bind(address, /* reuseAddress = */ true, /* reusePort = */ config.getBool("listen_reuse_port", false));
/// If caller requests any available port from the OS, discover it after binding.
if (port == 0)
{
address = socket.address();
LOG_DEBUG(&logger(), "Requested any available port (port == 0), actual port is {:d}", address.port());
}
socket.listen(/* backlog = */ config.getUInt("listen_backlog", 4096));
return address;
}
Strings getListenHosts(const Poco::Util::AbstractConfiguration & config)
{
auto listen_hosts = DB::getMultipleValuesFromConfig(config, "", "listen_host");
if (listen_hosts.empty())
{
listen_hosts.emplace_back("::1");
listen_hosts.emplace_back("127.0.0.1");
}
return listen_hosts;
}
Strings getInterserverListenHosts(const Poco::Util::AbstractConfiguration & config)
{
auto interserver_listen_hosts = DB::getMultipleValuesFromConfig(config, "", "interserver_listen_host");
if (!interserver_listen_hosts.empty())
return interserver_listen_hosts;
/// Use more general restriction in case of emptiness
return getListenHosts(config);
}
bool getListenTry(const Poco::Util::AbstractConfiguration & config)
{
bool listen_try = config.getBool("listen_try", false);
if (!listen_try)
{
Poco::Util::AbstractConfiguration::Keys protocols;
config.keys("protocols", protocols);
listen_try =
DB::getMultipleValuesFromConfig(config, "", "listen_host").empty() &&
std::none_of(protocols.begin(), protocols.end(), [&](const auto & protocol)
{
return config.has("protocols." + protocol + ".host") && config.has("protocols." + protocol + ".port");
});
}
return listen_try;
}
void Server::createServer(
Poco::Util::AbstractConfiguration & config,
const std::string & listen_host,
const char * port_name,
bool listen_try,
bool start_server,
std::vector<ProtocolServerAdapter> & servers,
CreateServerFunc && func) const
{
/// For testing purposes, user may omit tcp_port or http_port or https_port in configuration file.
if (config.getString(port_name, "").empty())
return;
/// If we already have an active server for this listen_host/port_name, don't create it again
for (const auto & server : servers)
{
if (!server.isStopping() && server.getListenHost() == listen_host && server.getPortName() == port_name)
return;
}
auto port = config.getInt(port_name);
try
{
servers.push_back(func(port));
if (start_server)
{
servers.back().start();
LOG_INFO(&logger(), "Listening for {}", servers.back().getDescription());
}
global_context->registerServerPort(port_name, port);
}
catch (const Poco::Exception &)
{
if (listen_try)
{
LOG_WARNING(&logger(), "Listen [{}]:{} failed: {}. If it is an IPv6 or IPv4 address and your host has disabled IPv6 or IPv4, "
"then consider to "
"specify not disabled IPv4 or IPv6 address to listen in <listen_host> element of configuration "
"file. Example for disabled IPv6: <listen_host>0.0.0.0</listen_host> ."
" Example for disabled IPv4: <listen_host>::</listen_host>",
listen_host, port, getCurrentExceptionMessage(false));
}
else
{
throw Exception(ErrorCodes::NETWORK_ERROR, "Listen [{}]:{} failed: {}", listen_host, port, getCurrentExceptionMessage(false));
}
}
}
#if defined(OS_LINUX)
namespace
{
void setOOMScore(int value, LoggerRawPtr log)
{
try
{
std::string value_string = std::to_string(value);
DB::WriteBufferFromFile buf("/proc/self/oom_score_adj");
buf.write(value_string.c_str(), value_string.size());
buf.next();
buf.close();
}
catch (const Poco::Exception & e)
{
LOG_WARNING(log, "Failed to adjust OOM score: '{}'.", e.displayText());
return;
}
LOG_INFO(log, "Set OOM score adjustment to {}", value);
}
}
#endif
void Server::uninitialize()
{
logger().information("shutting down");
BaseDaemon::uninitialize();
}
int Server::run()
{
if (config().hasOption("help"))
{
Poco::Util::HelpFormatter help_formatter(Server::options());
auto header_str = fmt::format("{} [OPTION] [-- [ARG]...]\n"
"positional arguments can be used to rewrite config.xml properties, for example, --http_port=8010",
commandName());
help_formatter.setHeader(header_str);
help_formatter.format(std::cout);
return 0;
}
if (config().hasOption("version"))
{
std::cout << VERSION_NAME << " server version " << VERSION_STRING << VERSION_OFFICIAL << "." << std::endl;
return 0;
}
return Application::run(); // NOLINT
}
void Server::initialize(Poco::Util::Application & self)
{
ConfigProcessor::registerEmbeddedConfig("config.xml", std::string_view(reinterpret_cast<const char *>(gresource_embedded_xmlData), gresource_embedded_xmlSize));
BaseDaemon::initialize(self);
logger().information("starting up");
LOG_INFO(&logger(), "OS name: {}, version: {}, architecture: {}",
Poco::Environment::osName(),
Poco::Environment::osVersion(),
Poco::Environment::osArchitecture());
}
std::string Server::getDefaultCorePath() const
{
return getCanonicalPath(config().getString("path", DBMS_DEFAULT_PATH)) + "cores";
}
void Server::defineOptions(Poco::Util::OptionSet & options)
{
options.addOption(
Poco::Util::Option("help", "h", "show help and exit")
.required(false)
.repeatable(false)
.binding("help"));
options.addOption(
Poco::Util::Option("version", "V", "show version and exit")
.required(false)
.repeatable(false)
.binding("version"));
BaseDaemon::defineOptions(options);
}
void checkForUsersNotInMainConfig(
const Poco::Util::AbstractConfiguration & config,
const std::string & config_path,
const std::string & users_config_path,
LoggerPtr log)
{
if (config.getBool("skip_check_for_incorrect_settings", false))
return;
if (config.has("users") || config.has("profiles") || config.has("quotas"))
{
/// We cannot throw exception here, because we have support for obsolete 'conf.d' directory
/// (that does not correspond to config.d or users.d) but substitute configuration to both of them.
LOG_ERROR(log, "The <users>, <profiles> and <quotas> elements should be located in users config file: {} not in main config {}."
" Also note that you should place configuration changes to the appropriate *.d directory like 'users.d'.",
users_config_path, config_path);
}
}
/// Unused in other builds
#if defined(OS_LINUX)
static String readLine(const String & path)
{
ReadBufferFromFile in(path);
String contents;
readStringUntilNewlineInto(contents, in);
return contents;
}
static int readNumber(const String & path)
{
ReadBufferFromFile in(path);
int result;
readText(result, in);
return result;
}
#endif
static void sanityChecks(Server & server)
{
std::string data_path = getCanonicalPath(server.config().getString("path", DBMS_DEFAULT_PATH));
std::string logs_path = server.config().getString("logger.log", "");
if (server.logger().is(Poco::Message::PRIO_TEST))
server.context()->addWarningMessage("Server logging level is set to 'test' and performance is degraded. This cannot be used in production.");
#if defined(OS_LINUX)
try
{
const std::unordered_set<std::string> fastClockSources = {
// ARM clock
"arch_sys_counter",
// KVM guest clock
"kvm-clock",
// X86 clock
"tsc",
};
const char * filename = "/sys/devices/system/clocksource/clocksource0/current_clocksource";
if (!fastClockSources.contains(readLine(filename)))
server.context()->addWarningMessage("Linux is not using a fast clock source. Performance can be degraded. Check " + String(filename));
}
catch (...) // NOLINT(bugprone-empty-catch)
{
}
try
{
const char * filename = "/proc/sys/vm/overcommit_memory";
if (readNumber(filename) == 2)
server.context()->addWarningMessage("Linux memory overcommit is disabled. Check " + String(filename));
}
catch (...) // NOLINT(bugprone-empty-catch)
{
}
try
{
const char * filename = "/sys/kernel/mm/transparent_hugepage/enabled";
if (readLine(filename).find("[always]") != std::string::npos)
server.context()->addWarningMessage("Linux transparent hugepages are set to \"always\". Check " + String(filename));
}
catch (...) // NOLINT(bugprone-empty-catch)
{
}
try
{
const char * filename = "/proc/sys/kernel/pid_max";
if (readNumber(filename) < 30000)
server.context()->addWarningMessage("Linux max PID is too low. Check " + String(filename));
}
catch (...) // NOLINT(bugprone-empty-catch)
{
}
try
{
const char * filename = "/proc/sys/kernel/threads-max";
if (readNumber(filename) < 30000)
server.context()->addWarningMessage("Linux threads max count is too low. Check " + String(filename));
}
catch (...) // NOLINT(bugprone-empty-catch)
{
}
try
{
const char * filename = "/proc/sys/kernel/task_delayacct";
if (readNumber(filename) == 0)
server.context()->addWarningMessage("Delay accounting is not enabled, OSIOWaitMicroseconds will not be gathered. You can enable it using `echo 1 > " + String(filename) + "` or by using sysctl.");
}
catch (...) // NOLINT(bugprone-empty-catch)
{
}
std::string dev_id = getBlockDeviceId(data_path);
if (getBlockDeviceType(dev_id) == BlockDeviceType::ROT && getBlockDeviceReadAheadBytes(dev_id) == 0)
server.context()->addWarningMessage("Rotational disk with disabled readahead is in use. Performance can be degraded. Used for data: " + String(data_path));
#endif
try
{
if (getAvailableMemoryAmount() < (2l << 30))
server.context()->addWarningMessage("Available memory at server startup is too low (2GiB).");
}
catch (...) // NOLINT(bugprone-empty-catch)
{
}
try
{
if (!enoughSpaceInDirectory(data_path, 1ull << 30))
server.context()->addWarningMessage("Available disk space for data at server startup is too low (1GiB): " + String(data_path));
}
catch (...) // NOLINT(bugprone-empty-catch)
{
}
try
{
if (!logs_path.empty())
{
auto logs_parent = fs::path(logs_path).parent_path();
if (!enoughSpaceInDirectory(logs_parent, 1ull << 30))
server.context()->addWarningMessage("Available disk space for logs at server startup is too low (1GiB): " + String(logs_parent));
}
}
catch (...) // NOLINT(bugprone-empty-catch)
{
}
if (server.context()->getMergeTreeSettings().allow_remote_fs_zero_copy_replication)
{
server.context()->addWarningMessage("The setting 'allow_remote_fs_zero_copy_replication' is enabled for MergeTree tables."
" But the feature of 'zero-copy replication' is under development and is not ready for production."
" The usage of this feature can lead to data corruption and loss. The setting should be disabled in production.");
}
}
static void initializeAzureSDKLogger(
[[ maybe_unused ]] const ServerSettings & server_settings,
[[ maybe_unused ]] int server_logs_level)
{
#if USE_AZURE_BLOB_STORAGE
if (!server_settings.enable_azure_sdk_logging)
return;
using AzureLogsLevel = Azure::Core::Diagnostics::Logger::Level;
static const std::unordered_map<AzureLogsLevel, std::pair<Poco::Message::Priority, DB::LogsLevel>> azure_to_server_mapping =
{
{AzureLogsLevel::Error, {Poco::Message::PRIO_DEBUG, LogsLevel::debug}},
{AzureLogsLevel::Warning, {Poco::Message::PRIO_DEBUG, LogsLevel::debug}},
{AzureLogsLevel::Informational, {Poco::Message::PRIO_TRACE, LogsLevel::trace}},
{AzureLogsLevel::Verbose, {Poco::Message::PRIO_TEST, LogsLevel::test}},
};
static const std::map<Poco::Message::Priority, AzureLogsLevel> server_to_azure_mapping =
{
{Poco::Message::PRIO_DEBUG, AzureLogsLevel::Warning},
{Poco::Message::PRIO_TRACE, AzureLogsLevel::Informational},
{Poco::Message::PRIO_TEST, AzureLogsLevel::Verbose},
};
static const LoggerPtr azure_sdk_logger = getLogger("AzureSDK");
auto it = server_to_azure_mapping.lower_bound(static_cast<Poco::Message::Priority>(server_logs_level));
chassert(it != server_to_azure_mapping.end());
Azure::Core::Diagnostics::Logger::SetLevel(it->second);
Azure::Core::Diagnostics::Logger::SetListener([](AzureLogsLevel level, const std::string & message)
{
auto [poco_level, db_level] = azure_to_server_mapping.at(level);
LOG_IMPL(azure_sdk_logger, db_level, poco_level, fmt::runtime(message));
});
#endif
}
int Server::main(const std::vector<std::string> & /*args*/)
try
{
Stopwatch startup_watch;
Poco::Logger * log = &logger();
UseSSL use_ssl;
MainThreadStatus::getInstance();
ServerSettings server_settings;
server_settings.loadSettingsFromConfig(config());
ASTAlterCommand::setFormatAlterCommandsWithParentheses(server_settings.format_alter_operations_with_parentheses);
StackTrace::setShowAddresses(server_settings.show_addresses_in_stack_traces);
#if USE_HDFS
/// This will point libhdfs3 to the right location for its config.
/// Note: this has to be done once at server initialization, because 'setenv' is not thread-safe.
String libhdfs3_conf = config().getString("hdfs.libhdfs3_conf", "");
if (!libhdfs3_conf.empty())
{
if (std::filesystem::path{libhdfs3_conf}.is_relative() && !std::filesystem::exists(libhdfs3_conf))
{
const String config_path = config().getString("config-file", "config.xml");
const auto config_dir = std::filesystem::path{config_path}.remove_filename();
if (std::filesystem::exists(config_dir / libhdfs3_conf))
libhdfs3_conf = std::filesystem::absolute(config_dir / libhdfs3_conf);
}
setenv("LIBHDFS3_CONF", libhdfs3_conf.c_str(), true /* overwrite */); // NOLINT
}
#endif
/// When building openssl into clickhouse, clickhouse owns the configuration
/// Therefore, the clickhouse openssl configuration should be kept separate from
/// the OS. Default to the one in the standard config directory, unless overridden
/// by a key in the config.
/// Note: this has to be done once at server initialization, because 'setenv' is not thread-safe.
if (config().has("opensslconf"))
{
std::string opensslconf_path = config().getString("opensslconf");
setenv("OPENSSL_CONF", opensslconf_path.c_str(), true); /// NOLINT
}
else
{
const String config_path = config().getString("config-file", "config.xml");
const auto config_dir = std::filesystem::path{config_path}.replace_filename("openssl.conf");
setenv("OPENSSL_CONF", config_dir.c_str(), true); /// NOLINT
}
registerInterpreters();
registerFunctions();
registerAggregateFunctions();
registerTableFunctions();
registerDatabases();
registerStorages();
registerDictionaries();
registerDisks(/* global_skip_access_check= */ false);
registerFormats();
registerRemoteFileMetadatas();
registerSchedulerNodes();
registerResourceManagers();
CurrentMetrics::set(CurrentMetrics::Revision, ClickHouseRevision::getVersionRevision());
CurrentMetrics::set(CurrentMetrics::VersionInteger, ClickHouseRevision::getVersionInteger());
Poco::ThreadPool server_pool(3, server_settings.max_connections);
std::mutex servers_lock;
std::vector<ProtocolServerAdapter> servers;
std::vector<ProtocolServerAdapter> servers_to_start_before_tables;
/** Context contains all that query execution is dependent:
* settings, available functions, data types, aggregate functions, databases, ...
*/
auto shared_context = Context::createShared();
global_context = Context::createGlobal(shared_context.get());
global_context->makeGlobalContext();
global_context->setApplicationType(Context::ApplicationType::SERVER);
#if !defined(NDEBUG) || !defined(__OPTIMIZE__)
global_context->addWarningMessage("Server was built in debug mode. It will work slowly.");
#endif
if (ThreadFuzzer::instance().isEffective())
global_context->addWarningMessage("ThreadFuzzer is enabled. Application will run slowly and unstable.");
#if defined(SANITIZER)
global_context->addWarningMessage("Server was built with sanitizer. It will work slowly.");
#endif
#if defined(SANITIZE_COVERAGE) || WITH_COVERAGE
global_context->addWarningMessage("Server was built with code coverage. It will work slowly.");
#endif
const size_t physical_server_memory = getMemoryAmount();
LOG_INFO(log, "Available RAM: {}; physical cores: {}; logical cores: {}.",
formatReadableSizeWithBinarySuffix(physical_server_memory),
getNumberOfPhysicalCPUCores(), // on ARM processors it can show only enabled at current moment cores
std::thread::hardware_concurrency());
#if defined(__x86_64__)
String cpu_info;
#define COLLECT_FLAG(X) \
if (CPU::have##X()) \
{ \
if (!cpu_info.empty()) \
cpu_info += ", "; \
cpu_info += #X; \
}
CPU_ID_ENUMERATE(COLLECT_FLAG)
#undef COLLECT_FLAG
LOG_INFO(log, "Available CPU instruction sets: {}", cpu_info);
#endif
bool will_have_trace_collector = hasPHDRCache() && config().has("trace_log");
// Initialize global thread pool. Do it before we fetch configs from zookeeper
// nodes (`from_zk`), because ZooKeeper interface uses the pool. We will
// ignore `max_thread_pool_size` in configs we fetch from ZK, but oh well.
GlobalThreadPool::initialize(
server_settings.max_thread_pool_size,
server_settings.max_thread_pool_free_size,
server_settings.thread_pool_queue_size,
will_have_trace_collector ? server_settings.global_profiler_real_time_period_ns : 0,
will_have_trace_collector ? server_settings.global_profiler_cpu_time_period_ns : 0);
/// Wait for all threads to avoid possible use-after-free (for example logging objects can be already destroyed).
SCOPE_EXIT({
Stopwatch watch;
LOG_INFO(log, "Waiting for background threads");
GlobalThreadPool::instance().shutdown();
LOG_INFO(log, "Background threads finished in {} ms", watch.elapsedMilliseconds());
});
/// NOTE: global context should be destroyed *before* GlobalThreadPool::shutdown()
/// Otherwise GlobalThreadPool::shutdown() will hang, since Context holds some threads.
SCOPE_EXIT({
/** Ask to cancel background jobs all table engines,
* and also query_log.
* It is important to do early, not in destructor of Context, because
* table engines could use Context on destroy.
*/
LOG_INFO(log, "Shutting down storages.");
global_context->shutdown();
LOG_DEBUG(log, "Shut down storages.");
if (!servers_to_start_before_tables.empty())
{
LOG_DEBUG(log, "Waiting for current connections to servers for tables to finish.");
size_t current_connections = 0;
{
std::lock_guard lock(servers_lock);
for (auto & server : servers_to_start_before_tables)
{
server.stop();
current_connections += server.currentConnections();
}
}
if (current_connections)
LOG_INFO(log, "Closed all listening sockets. Waiting for {} outstanding connections.", current_connections);
else
LOG_INFO(log, "Closed all listening sockets.");
if (current_connections > 0)
current_connections = waitServersToFinish(servers_to_start_before_tables, servers_lock, server_settings.shutdown_wait_unfinished);
if (current_connections)
LOG_INFO(log, "Closed connections to servers for tables. But {} remain. Probably some tables of other users cannot finish their connections after context shutdown.", current_connections);
else
LOG_INFO(log, "Closed connections to servers for tables.");
}
global_context->shutdownKeeperDispatcher();
/// Wait server pool to avoid use-after-free of destroyed context in the handlers
server_pool.joinAll();
/** Explicitly destroy Context. It is more convenient than in destructor of Server, because logger is still available.
* At this moment, no one could own shared part of Context.
*/
global_context.reset();
shared_context.reset();
LOG_DEBUG(log, "Destroyed global context.");
});
#if USE_AZURE_BLOB_STORAGE
/// It makes sense to deinitialize libxml after joining of all threads
/// in global pool because libxml uses thread-local memory allocations via
/// 'pthread_key_create' and 'pthread_setspecific' which should be deallocated
/// at 'pthread_exit'. Deinitialization of libxml leads to call of 'pthread_key_delete'
/// and if it is done before joining of threads, allocated memory will not be freed
/// and there may be memory leaks in threads that used libxml.
GlobalThreadPool::instance().addOnDestroyCallback([]
{
Azure::Storage::_internal::XmlGlobalDeinitialize();
});
#endif
getIOThreadPool().initialize(
server_settings.max_io_thread_pool_size,
server_settings.max_io_thread_pool_free_size,
server_settings.io_thread_pool_queue_size);
getBackupsIOThreadPool().initialize(
server_settings.max_backups_io_thread_pool_size,
server_settings.max_backups_io_thread_pool_free_size,
server_settings.backups_io_thread_pool_queue_size);
getActivePartsLoadingThreadPool().initialize(
server_settings.max_active_parts_loading_thread_pool_size,
0, // We don't need any threads once all the parts will be loaded
server_settings.max_active_parts_loading_thread_pool_size);
getOutdatedPartsLoadingThreadPool().initialize(
server_settings.max_outdated_parts_loading_thread_pool_size,
0, // We don't need any threads once all the parts will be loaded
server_settings.max_outdated_parts_loading_thread_pool_size);
/// It could grow if we need to synchronously wait until all the data parts will be loaded.
getOutdatedPartsLoadingThreadPool().setMaxTurboThreads(
server_settings.max_active_parts_loading_thread_pool_size
);
getUnexpectedPartsLoadingThreadPool().initialize(
server_settings.max_unexpected_parts_loading_thread_pool_size,
0, // We don't need any threads once all the parts will be loaded
server_settings.max_unexpected_parts_loading_thread_pool_size);
/// It could grow if we need to synchronously wait until all the data parts will be loaded.
getUnexpectedPartsLoadingThreadPool().setMaxTurboThreads(
server_settings.max_active_parts_loading_thread_pool_size
);
getPartsCleaningThreadPool().initialize(
server_settings.max_parts_cleaning_thread_pool_size,
0, // We don't need any threads one all the parts will be deleted
server_settings.max_parts_cleaning_thread_pool_size);
auto max_database_replicated_create_table_thread_pool_size = server_settings.max_database_replicated_create_table_thread_pool_size ?
server_settings.max_database_replicated_create_table_thread_pool_size : getNumberOfPhysicalCPUCores();
getDatabaseReplicatedCreateTablesThreadPool().initialize(
max_database_replicated_create_table_thread_pool_size,
0, // We don't need any threads once all the tables will be created
max_database_replicated_create_table_thread_pool_size);
/// Initialize global local cache for remote filesystem.
if (config().has("local_cache_for_remote_fs"))
{
bool enable = config().getBool("local_cache_for_remote_fs.enable", false);
if (enable)
{
String root_dir = config().getString("local_cache_for_remote_fs.root_dir");
UInt64 limit_size = config().getUInt64("local_cache_for_remote_fs.limit_size");
UInt64 bytes_read_before_flush
= config().getUInt64("local_cache_for_remote_fs.bytes_read_before_flush", DBMS_DEFAULT_BUFFER_SIZE);
ExternalDataSourceCache::instance().initOnce(global_context, root_dir, limit_size, bytes_read_before_flush);
}
}
/// This object will periodically calculate some metrics.
ServerAsynchronousMetrics async_metrics(
global_context,
server_settings.asynchronous_metrics_update_period_s,
server_settings.asynchronous_heavy_metrics_update_period_s,
[&]() -> std::vector<ProtocolServerMetrics>
{
std::vector<ProtocolServerMetrics> metrics;
std::lock_guard lock(servers_lock);
metrics.reserve(servers_to_start_before_tables.size() + servers.size());
for (const auto & server : servers_to_start_before_tables)
metrics.emplace_back(ProtocolServerMetrics{server.getPortName(), server.currentThreads()});
for (const auto & server : servers)
metrics.emplace_back(ProtocolServerMetrics{server.getPortName(), server.currentThreads()});
return metrics;
}
);
zkutil::validateZooKeeperConfig(config());
bool has_zookeeper = zkutil::hasZooKeeperConfig(config());
zkutil::ZooKeeperNodeCache main_config_zk_node_cache([&] { return global_context->getZooKeeper(); });
zkutil::EventPtr main_config_zk_changed_event = std::make_shared<Poco::Event>();
if (loaded_config.has_zk_includes)
{
auto old_configuration = loaded_config.configuration;
ConfigProcessor config_processor(config_path);
loaded_config = config_processor.loadConfigWithZooKeeperIncludes(
main_config_zk_node_cache, main_config_zk_changed_event, /* fallback_to_preprocessed = */ true);
config_processor.savePreprocessedConfig(loaded_config, config().getString("path", DBMS_DEFAULT_PATH));
config().removeConfiguration(old_configuration.get());
config().add(loaded_config.configuration.duplicate(), PRIO_DEFAULT, false);
global_context->setConfig(loaded_config.configuration);
}
Settings::checkNoSettingNamesAtTopLevel(config(), config_path);
/// We need to reload server settings because config could be updated via zookeeper.
server_settings.loadSettingsFromConfig(config());
/// NOTE: Do sanity checks after we loaded all possible substitutions (for the configuration) from ZK
sanityChecks(*this);
#if defined(OS_LINUX)
std::string executable_path = getExecutablePath();
if (!executable_path.empty())
{
/// Integrity check based on checksum of the executable code.
/// Note: it is not intended to protect from malicious party,
/// because the reference checksum can be easily modified as well.
/// And we don't involve asymmetric encryption with PKI yet.
/// It's only intended to protect from faulty hardware.
/// Note: it is only based on machine code.
/// But there are other sections of the binary (e.g. exception handling tables)
/// that are interpreted (not executed) but can alter the behaviour of the program as well.
/// Please keep the below log messages in-sync with the ones in daemon/BaseDaemon.cpp
if (stored_binary_hash.empty())
{
LOG_WARNING(log, "Integrity check of the executable skipped because the reference checksum could not be read.");
}
else
{
String calculated_binary_hash = getHashOfLoadedBinaryHex();
if (calculated_binary_hash == stored_binary_hash)
{
LOG_INFO(log, "Integrity check of the executable successfully passed (checksum: {})", calculated_binary_hash);
}
else
{
/// If program is run under debugger, ptrace will fail.
if (ptrace(PTRACE_TRACEME, 0, nullptr, nullptr) == -1)
{
/// Program is run under debugger. Modification of it's binary image is ok for breakpoints.
global_context->addWarningMessage(fmt::format(
"Server is run under debugger and its binary image is modified (most likely with breakpoints).",
calculated_binary_hash));
}
else
{
throw Exception(
ErrorCodes::CORRUPTED_DATA,
"Calculated checksum of the executable ({0}) does not correspond"
" to the reference checksum stored in the executable ({1})."
" This may indicate one of the following:"
" - the executable {2} was changed just after startup;"
" - the executable {2} was corrupted on disk due to faulty hardware;"
" - the loaded executable was corrupted in memory due to faulty hardware;"
" - the file {2} was intentionally modified;"
" - a logical error in the code.",
calculated_binary_hash,
stored_binary_hash,
executable_path);
}
}
}
}
else
executable_path = "/usr/bin/clickhouse"; /// It is used for information messages.
/// After full config loaded
{
if (config().getBool("remap_executable", false))
{
LOG_DEBUG(log, "Will remap executable in memory.");
size_t size = remapExecutable();
LOG_DEBUG(log, "The code ({}) in memory has been successfully remapped.", ReadableSize(size));
}
if (config().getBool("mlock_executable", false))
{
if (hasLinuxCapability(CAP_IPC_LOCK))
{
try
{
/// Get the memory area with (current) code segment.
/// It's better to lock only the code segment instead of calling "mlockall",
/// because otherwise debug info will be also locked in memory, and it can be huge.
auto [addr, len] = getMappedArea(reinterpret_cast<void *>(mainEntryClickHouseServer));
LOG_TRACE(log, "Will do mlock to prevent executable memory from being paged out. It may take a few seconds.");
if (0 != mlock(addr, len))
LOG_WARNING(log, "Failed mlock: {}", errnoToString());
else
LOG_TRACE(log, "The memory map of clickhouse executable has been mlock'ed, total {}", ReadableSize(len));
}
catch (...)
{
LOG_WARNING(log, "Cannot mlock: {}", getCurrentExceptionMessage(false));
}
}
else
{
LOG_INFO(log, "It looks like the process has no CAP_IPC_LOCK capability, binary mlock will be disabled."
" It could happen due to incorrect ClickHouse package installation."
" You could resolve the problem manually with 'sudo setcap cap_ipc_lock=+ep {}'."
" Note that it will not work on 'nosuid' mounted filesystems.", executable_path);
}
}
}
FailPointInjection::enableFromGlobalConfig(config());
int default_oom_score = 0;
#if !defined(NDEBUG)
/// In debug version on Linux, increase oom score so that clickhouse is killed
/// first, instead of some service. Use a carefully chosen random score of 555:
/// the maximum is 1000, and chromium uses 300 for its tab processes. Ignore
/// whatever errors that occur, because it's just a debugging aid and we don't
/// care if it breaks.
default_oom_score = 555;
#endif
int oom_score = config().getInt("oom_score", default_oom_score);
if (oom_score)
setOOMScore(oom_score, log);
#endif
global_context->setRemoteHostFilter(config());
global_context->setHTTPHeaderFilter(config());
std::string path_str = getCanonicalPath(config().getString("path", DBMS_DEFAULT_PATH));
fs::path path = path_str;
std::string default_database = server_settings.default_database.toString();
/// Check that the process user id matches the owner of the data.
assertProcessUserMatchesDataOwner(path_str, [&](const std::string & message){ global_context->addWarningMessage(message); });
global_context->setPath(path_str);
StatusFile status{path / "status", StatusFile::write_full_info};
ServerUUID::load(path / "uuid", log);
/// Try to increase limit on number of open files.
{
rlimit rlim;
if (getrlimit(RLIMIT_NOFILE, &rlim))
throw Poco::Exception("Cannot getrlimit");
if (rlim.rlim_cur == rlim.rlim_max)
{
LOG_DEBUG(log, "rlimit on number of file descriptors is {}", rlim.rlim_cur);
}
else
{
rlim_t old = rlim.rlim_cur;
rlim.rlim_cur = config().getUInt("max_open_files", static_cast<unsigned>(rlim.rlim_max));
int rc = setrlimit(RLIMIT_NOFILE, &rlim);
if (rc != 0)
LOG_WARNING(log, "Cannot set max number of file descriptors to {}. Try to specify max_open_files according to your system limits. error: {}", rlim.rlim_cur, errnoToString());
else
LOG_DEBUG(log, "Set max number of file descriptors to {} (was {}).", rlim.rlim_cur, old);
}
}
/// Try to increase limit on number of threads.
{
rlimit rlim;
if (getrlimit(RLIMIT_NPROC, &rlim))
throw Poco::Exception("Cannot getrlimit");
if (rlim.rlim_cur == rlim.rlim_max)
{
LOG_DEBUG(log, "rlimit on number of threads is {}", rlim.rlim_cur);
}
else
{
rlim_t old = rlim.rlim_cur;
rlim.rlim_cur = rlim.rlim_max;
int rc = setrlimit(RLIMIT_NPROC, &rlim);
if (rc != 0)
{
LOG_WARNING(log, "Cannot set max number of threads to {}. error: {}", rlim.rlim_cur, errnoToString());
rlim.rlim_cur = old;
}
else
{
LOG_DEBUG(log, "Set max number of threads to {} (was {}).", rlim.rlim_cur, old);
}
}
if (rlim.rlim_cur < 30000)
{
global_context->addWarningMessage("Maximum number of threads is lower than 30000. There could be problems with handling a lot of simultaneous queries.");
}
}
static ServerErrorHandler error_handler;
Poco::ErrorHandler::set(&error_handler);
/// Initialize DateLUT early, to not interfere with running time of first query.
LOG_DEBUG(log, "Initializing DateLUT.");
DateLUT::serverTimezoneInstance();
LOG_TRACE(log, "Initialized DateLUT with time zone '{}'.", DateLUT::serverTimezoneInstance().getTimeZone());
/// Storage with temporary data for processing of heavy queries.
if (!server_settings.tmp_policy.value.empty())
{
global_context->setTemporaryStoragePolicy(server_settings.tmp_policy, server_settings.max_temporary_data_on_disk_size);
}
else if (!server_settings.temporary_data_in_cache.value.empty())
{
global_context->setTemporaryStorageInCache(server_settings.temporary_data_in_cache, server_settings.max_temporary_data_on_disk_size);
}
else
{
std::string temporary_path = config().getString("tmp_path", path / "tmp/");
global_context->setTemporaryStoragePath(temporary_path, server_settings.max_temporary_data_on_disk_size);
}
/** Directory with 'flags': files indicating temporary settings for the server set by system administrator.
* Flags may be cleared automatically after being applied by the server.
* Examples: do repair of local data; clone all replicated tables from replica.
*/
{
auto flags_path = path / "flags/";
fs::create_directories(flags_path);
global_context->setFlagsPath(flags_path);
}
/** Directory with user provided files that are usable by 'file' table function.
*/
{
std::string user_files_path = config().getString("user_files_path", path / "user_files/");
global_context->setUserFilesPath(user_files_path);
fs::create_directories(user_files_path);
}
{
std::string dictionaries_lib_path = config().getString("dictionaries_lib_path", path / "dictionaries_lib/");
global_context->setDictionariesLibPath(dictionaries_lib_path);
fs::create_directories(dictionaries_lib_path);
}
{
std::string user_scripts_path = config().getString("user_scripts_path", path / "user_scripts/");
global_context->setUserScriptsPath(user_scripts_path);
fs::create_directories(user_scripts_path);
}
/// top_level_domains_lists
{
const std::string & top_level_domains_path = config().getString("top_level_domains_path", path / "top_level_domains/");
TLDListsHolder::getInstance().parseConfig(fs::path(top_level_domains_path) / "", config());
}
{
fs::create_directories(path / "data");
fs::create_directories(path / "metadata");
/// Directory with metadata of tables, which was marked as dropped by Atomic database
fs::create_directories(path / "metadata_dropped");
}
if (config().has("interserver_http_port") && config().has("interserver_https_port"))
throw Exception(ErrorCodes::EXCESSIVE_ELEMENT_IN_CONFIG, "Both http and https interserver ports are specified");
static const auto interserver_tags =
{
std::make_tuple("interserver_http_host", "interserver_http_port", "http"),
std::make_tuple("interserver_https_host", "interserver_https_port", "https")
};
for (auto [host_tag, port_tag, scheme] : interserver_tags)
{
if (config().has(port_tag))
{
String this_host = config().getString(host_tag, "");
if (this_host.empty())
{
this_host = getFQDNOrHostName();
LOG_DEBUG(log, "Configuration parameter '{}' doesn't exist or exists and empty. Will use '{}' as replica host.",
host_tag, this_host);
}
String port_str = config().getString(port_tag);
int port = parse<int>(port_str);
if (port < 0 || port > 0xFFFF)
throw Exception(ErrorCodes::ARGUMENT_OUT_OF_BOUND, "Out of range '{}': {}", String(port_tag), port);
global_context->setInterserverIOAddress(this_host, port);
global_context->setInterserverScheme(scheme);
}
}
LOG_DEBUG(log, "Initializing interserver credentials.");
global_context->updateInterserverCredentials(config());
if (config().has("macros"))
global_context->setMacros(std::make_unique<Macros>(config(), "macros", log));
/// Set up caches.
const size_t max_cache_size = static_cast<size_t>(physical_server_memory * server_settings.cache_size_to_ram_max_ratio);
String uncompressed_cache_policy = server_settings.uncompressed_cache_policy;
size_t uncompressed_cache_size = server_settings.uncompressed_cache_size;
double uncompressed_cache_size_ratio = server_settings.uncompressed_cache_size_ratio;
if (uncompressed_cache_size > max_cache_size)
{
uncompressed_cache_size = max_cache_size;
LOG_INFO(log, "Lowered uncompressed cache size to {} because the system has limited RAM", formatReadableSizeWithBinarySuffix(uncompressed_cache_size));
}
global_context->setUncompressedCache(uncompressed_cache_policy, uncompressed_cache_size, uncompressed_cache_size_ratio);
String mark_cache_policy = server_settings.mark_cache_policy;
size_t mark_cache_size = server_settings.mark_cache_size;
double mark_cache_size_ratio = server_settings.mark_cache_size_ratio;
if (mark_cache_size > max_cache_size)
{
mark_cache_size = max_cache_size;
LOG_INFO(log, "Lowered mark cache size to {} because the system has limited RAM", formatReadableSizeWithBinarySuffix(mark_cache_size));
}
global_context->setMarkCache(mark_cache_policy, mark_cache_size, mark_cache_size_ratio);
size_t page_cache_size = server_settings.page_cache_size;
if (page_cache_size != 0)
global_context->setPageCache(
server_settings.page_cache_chunk_size, server_settings.page_cache_mmap_size,
page_cache_size, server_settings.page_cache_use_madv_free,
server_settings.page_cache_use_transparent_huge_pages);
String index_uncompressed_cache_policy = server_settings.index_uncompressed_cache_policy;
size_t index_uncompressed_cache_size = server_settings.index_uncompressed_cache_size;
double index_uncompressed_cache_size_ratio = server_settings.index_uncompressed_cache_size_ratio;
if (index_uncompressed_cache_size > max_cache_size)
{
index_uncompressed_cache_size = max_cache_size;
LOG_INFO(log, "Lowered index uncompressed cache size to {} because the system has limited RAM", formatReadableSizeWithBinarySuffix(uncompressed_cache_size));
}
global_context->setIndexUncompressedCache(index_uncompressed_cache_policy, index_uncompressed_cache_size, index_uncompressed_cache_size_ratio);
String index_mark_cache_policy = server_settings.index_mark_cache_policy;
size_t index_mark_cache_size = server_settings.index_mark_cache_size;
double index_mark_cache_size_ratio = server_settings.index_mark_cache_size_ratio;
if (index_mark_cache_size > max_cache_size)
{
index_mark_cache_size = max_cache_size;
LOG_INFO(log, "Lowered index mark cache size to {} because the system has limited RAM", formatReadableSizeWithBinarySuffix(uncompressed_cache_size));
}
global_context->setIndexMarkCache(index_mark_cache_policy, index_mark_cache_size, index_mark_cache_size_ratio);
size_t mmap_cache_size = server_settings.mmap_cache_size;
if (mmap_cache_size > max_cache_size)
{
mmap_cache_size = max_cache_size;
LOG_INFO(log, "Lowered mmap file cache size to {} because the system has limited RAM", formatReadableSizeWithBinarySuffix(uncompressed_cache_size));
}
global_context->setMMappedFileCache(mmap_cache_size);
size_t query_cache_max_size_in_bytes = config().getUInt64("query_cache.max_size_in_bytes", DEFAULT_QUERY_CACHE_MAX_SIZE);
size_t query_cache_max_entries = config().getUInt64("query_cache.max_entries", DEFAULT_QUERY_CACHE_MAX_ENTRIES);
size_t query_cache_query_cache_max_entry_size_in_bytes = config().getUInt64("query_cache.max_entry_size_in_bytes", DEFAULT_QUERY_CACHE_MAX_ENTRY_SIZE_IN_BYTES);
size_t query_cache_max_entry_size_in_rows = config().getUInt64("query_cache.max_entry_rows_in_rows", DEFAULT_QUERY_CACHE_MAX_ENTRY_SIZE_IN_ROWS);
if (query_cache_max_size_in_bytes > max_cache_size)
{
query_cache_max_size_in_bytes = max_cache_size;
LOG_INFO(log, "Lowered query cache size to {} because the system has limited RAM", formatReadableSizeWithBinarySuffix(uncompressed_cache_size));
}
global_context->setQueryCache(query_cache_max_size_in_bytes, query_cache_max_entries, query_cache_query_cache_max_entry_size_in_bytes, query_cache_max_entry_size_in_rows);
#if USE_EMBEDDED_COMPILER
size_t compiled_expression_cache_max_size_in_bytes = config().getUInt64("compiled_expression_cache_size", DEFAULT_COMPILED_EXPRESSION_CACHE_MAX_SIZE);
size_t compiled_expression_cache_max_elements = config().getUInt64("compiled_expression_cache_elements_size", DEFAULT_COMPILED_EXPRESSION_CACHE_MAX_ENTRIES);
CompiledExpressionCacheFactory::instance().init(compiled_expression_cache_max_size_in_bytes, compiled_expression_cache_max_elements);
#endif
NamedCollectionUtils::loadIfNot();
/// Initialize main config reloader.
std::string include_from_path = config().getString("include_from", "/etc/metrika.xml");
if (config().has("query_masking_rules"))
{
SensitiveDataMasker::setInstance(std::make_unique<SensitiveDataMasker>(config(), "query_masking_rules"));
}
std::optional<CgroupsMemoryUsageObserver> cgroups_memory_usage_observer;
try
{
auto wait_time = server_settings.cgroups_memory_usage_observer_wait_time;
if (wait_time != 0)
cgroups_memory_usage_observer.emplace(std::chrono::seconds(wait_time));
}
catch (Exception &)
{
tryLogCurrentException(log, "Disabling cgroup memory observer because of an error during initialization");
}
const std::string cert_path = config().getString("openSSL.server.certificateFile", "");
const std::string key_path = config().getString("openSSL.server.privateKeyFile", "");
std::vector<std::string> extra_paths = {include_from_path};
if (!cert_path.empty())
extra_paths.emplace_back(cert_path);
if (!key_path.empty())
extra_paths.emplace_back(key_path);
auto main_config_reloader = std::make_unique<ConfigReloader>(
config_path,
extra_paths,
config().getString("path", DBMS_DEFAULT_PATH),
std::move(main_config_zk_node_cache),
main_config_zk_changed_event,
[&](ConfigurationPtr config, bool initial_loading)
{
Settings::checkNoSettingNamesAtTopLevel(*config, config_path);
ServerSettings new_server_settings;
new_server_settings.loadSettingsFromConfig(*config);
size_t max_server_memory_usage = new_server_settings.max_server_memory_usage;
double max_server_memory_usage_to_ram_ratio = new_server_settings.max_server_memory_usage_to_ram_ratio;
size_t current_physical_server_memory = getMemoryAmount(); /// With cgroups, the amount of memory available to the server can be changed dynamically.
size_t default_max_server_memory_usage = static_cast<size_t>(current_physical_server_memory * max_server_memory_usage_to_ram_ratio);
if (max_server_memory_usage == 0)
{
max_server_memory_usage = default_max_server_memory_usage;
LOG_INFO(log, "Setting max_server_memory_usage was set to {}"
" ({} available * {:.2f} max_server_memory_usage_to_ram_ratio)",
formatReadableSizeWithBinarySuffix(max_server_memory_usage),
formatReadableSizeWithBinarySuffix(current_physical_server_memory),
max_server_memory_usage_to_ram_ratio);
}
else if (max_server_memory_usage > default_max_server_memory_usage)
{
max_server_memory_usage = default_max_server_memory_usage;
LOG_INFO(log, "Setting max_server_memory_usage was lowered to {}"
" because the system has low amount of memory. The amount was"
" calculated as {} available"
" * {:.2f} max_server_memory_usage_to_ram_ratio",
formatReadableSizeWithBinarySuffix(max_server_memory_usage),
formatReadableSizeWithBinarySuffix(current_physical_server_memory),
max_server_memory_usage_to_ram_ratio);
}
total_memory_tracker.setHardLimit(max_server_memory_usage);
total_memory_tracker.setDescription("(total)");
total_memory_tracker.setMetric(CurrentMetrics::MemoryTracking);
if (cgroups_memory_usage_observer)
{
double hard_limit_ratio = new_server_settings.cgroup_memory_watcher_hard_limit_ratio;
double soft_limit_ratio = new_server_settings.cgroup_memory_watcher_soft_limit_ratio;
cgroups_memory_usage_observer->setMemoryUsageLimits(
static_cast<uint64_t>(max_server_memory_usage * hard_limit_ratio),
static_cast<uint64_t>(max_server_memory_usage * soft_limit_ratio));
}
size_t merges_mutations_memory_usage_soft_limit = new_server_settings.merges_mutations_memory_usage_soft_limit;
size_t default_merges_mutations_server_memory_usage = static_cast<size_t>(current_physical_server_memory * new_server_settings.merges_mutations_memory_usage_to_ram_ratio);
if (merges_mutations_memory_usage_soft_limit == 0)
{
merges_mutations_memory_usage_soft_limit = default_merges_mutations_server_memory_usage;
LOG_INFO(log, "Setting merges_mutations_memory_usage_soft_limit was set to {}"
" ({} available * {:.2f} merges_mutations_memory_usage_to_ram_ratio)",
formatReadableSizeWithBinarySuffix(merges_mutations_memory_usage_soft_limit),
formatReadableSizeWithBinarySuffix(current_physical_server_memory),
new_server_settings.merges_mutations_memory_usage_to_ram_ratio);
}
else if (merges_mutations_memory_usage_soft_limit > default_merges_mutations_server_memory_usage)
{
merges_mutations_memory_usage_soft_limit = default_merges_mutations_server_memory_usage;
LOG_WARNING(log, "Setting merges_mutations_memory_usage_soft_limit was set to {}"
" ({} available * {:.2f} merges_mutations_memory_usage_to_ram_ratio)",
formatReadableSizeWithBinarySuffix(merges_mutations_memory_usage_soft_limit),
formatReadableSizeWithBinarySuffix(current_physical_server_memory),
new_server_settings.merges_mutations_memory_usage_to_ram_ratio);
}
LOG_INFO(log, "Merges and mutations memory limit is set to {}",
formatReadableSizeWithBinarySuffix(merges_mutations_memory_usage_soft_limit));
background_memory_tracker.setSoftLimit(merges_mutations_memory_usage_soft_limit);
background_memory_tracker.setDescription("(background)");
background_memory_tracker.setMetric(CurrentMetrics::MergesMutationsMemoryTracking);
total_memory_tracker.setAllowUseJemallocMemory(new_server_settings.allow_use_jemalloc_memory);
auto * global_overcommit_tracker = global_context->getGlobalOvercommitTracker();
total_memory_tracker.setOvercommitTracker(global_overcommit_tracker);
// FIXME logging-related things need synchronization -- see the 'Logger * log' saved
// in a lot of places. For now, disable updating log configuration without server restart.
//setTextLog(global_context->getTextLog());
updateLevels(*config, logger());
global_context->setClustersConfig(config, has_zookeeper);
global_context->setMacros(std::make_unique<Macros>(*config, "macros", log));
global_context->setExternalAuthenticatorsConfig(*config);
if (global_context->isServerCompletelyStarted())
{
/// It does not make sense to reload anything before server has started.
/// Moreover, it may break initialization order.
global_context->loadOrReloadDictionaries(*config);
global_context->loadOrReloadUserDefinedExecutableFunctions(*config);
}
global_context->setRemoteHostFilter(*config);
global_context->setHTTPHeaderFilter(*config);
global_context->setMaxTableSizeToDrop(new_server_settings.max_table_size_to_drop);
global_context->setMaxPartitionSizeToDrop(new_server_settings.max_partition_size_to_drop);
global_context->setMaxTableNumToWarn(new_server_settings.max_table_num_to_warn);
global_context->setMaxDatabaseNumToWarn(new_server_settings.max_database_num_to_warn);
global_context->setMaxPartNumToWarn(new_server_settings.max_part_num_to_warn);
SlotCount concurrent_threads_soft_limit = UnlimitedSlots;
if (new_server_settings.concurrent_threads_soft_limit_num > 0 && new_server_settings.concurrent_threads_soft_limit_num < concurrent_threads_soft_limit)
concurrent_threads_soft_limit = new_server_settings.concurrent_threads_soft_limit_num;
if (new_server_settings.concurrent_threads_soft_limit_ratio_to_cores > 0)
{
auto value = new_server_settings.concurrent_threads_soft_limit_ratio_to_cores * std::thread::hardware_concurrency();
if (value > 0 && value < concurrent_threads_soft_limit)
concurrent_threads_soft_limit = value;
}
ConcurrencyControl::instance().setMaxConcurrency(concurrent_threads_soft_limit);
global_context->getProcessList().setMaxSize(new_server_settings.max_concurrent_queries);
global_context->getProcessList().setMaxInsertQueriesAmount(new_server_settings.max_concurrent_insert_queries);
global_context->getProcessList().setMaxSelectQueriesAmount(new_server_settings.max_concurrent_select_queries);
global_context->getProcessList().setMaxWaitingQueriesAmount(new_server_settings.max_waiting_queries);
if (config->has("keeper_server"))
global_context->updateKeeperConfiguration(*config);
/// Reload the number of threads for global pools.
/// Note: If you specified it in the top level config (not it config of default profile)
/// then ClickHouse will use it exactly.
/// This is done for backward compatibility.
if (global_context->areBackgroundExecutorsInitialized())
{
auto new_pool_size = new_server_settings.background_pool_size;
auto new_ratio = new_server_settings.background_merges_mutations_concurrency_ratio;
global_context->getMergeMutateExecutor()->increaseThreadsAndMaxTasksCount(new_pool_size, static_cast<size_t>(new_pool_size * new_ratio));
global_context->getMergeMutateExecutor()->updateSchedulingPolicy(new_server_settings.background_merges_mutations_scheduling_policy.toString());
}
if (global_context->areBackgroundExecutorsInitialized())
{
auto new_pool_size = new_server_settings.background_move_pool_size;
global_context->getMovesExecutor()->increaseThreadsAndMaxTasksCount(new_pool_size, new_pool_size);
}
if (global_context->areBackgroundExecutorsInitialized())
{
auto new_pool_size = new_server_settings.background_fetches_pool_size;
global_context->getFetchesExecutor()->increaseThreadsAndMaxTasksCount(new_pool_size, new_pool_size);
}
if (global_context->areBackgroundExecutorsInitialized())
{
auto new_pool_size = new_server_settings.background_common_pool_size;
global_context->getCommonExecutor()->increaseThreadsAndMaxTasksCount(new_pool_size, new_pool_size);
}
global_context->getBufferFlushSchedulePool().increaseThreadsCount(new_server_settings.background_buffer_flush_schedule_pool_size);
global_context->getSchedulePool().increaseThreadsCount(new_server_settings.background_schedule_pool_size);
global_context->getMessageBrokerSchedulePool().increaseThreadsCount(new_server_settings.background_message_broker_schedule_pool_size);
global_context->getDistributedSchedulePool().increaseThreadsCount(new_server_settings.background_distributed_schedule_pool_size);
global_context->getAsyncLoader().setMaxThreads(TablesLoaderForegroundPoolId, new_server_settings.tables_loader_foreground_pool_size);
global_context->getAsyncLoader().setMaxThreads(TablesLoaderBackgroundLoadPoolId, new_server_settings.tables_loader_background_pool_size);
global_context->getAsyncLoader().setMaxThreads(TablesLoaderBackgroundStartupPoolId, new_server_settings.tables_loader_background_pool_size);
getIOThreadPool().reloadConfiguration(
new_server_settings.max_io_thread_pool_size,
new_server_settings.max_io_thread_pool_free_size,
new_server_settings.io_thread_pool_queue_size);
getBackupsIOThreadPool().reloadConfiguration(
new_server_settings.max_backups_io_thread_pool_size,
new_server_settings.max_backups_io_thread_pool_free_size,
new_server_settings.backups_io_thread_pool_queue_size);
getActivePartsLoadingThreadPool().reloadConfiguration(
new_server_settings.max_active_parts_loading_thread_pool_size,
0, // We don't need any threads once all the parts will be loaded
new_server_settings.max_active_parts_loading_thread_pool_size);
getOutdatedPartsLoadingThreadPool().reloadConfiguration(
new_server_settings.max_outdated_parts_loading_thread_pool_size,
0, // We don't need any threads once all the parts will be loaded
new_server_settings.max_outdated_parts_loading_thread_pool_size);
/// It could grow if we need to synchronously wait until all the data parts will be loaded.
getOutdatedPartsLoadingThreadPool().setMaxTurboThreads(
new_server_settings.max_active_parts_loading_thread_pool_size
);
getPartsCleaningThreadPool().reloadConfiguration(
new_server_settings.max_parts_cleaning_thread_pool_size,
0, // We don't need any threads one all the parts will be deleted
new_server_settings.max_parts_cleaning_thread_pool_size);
if (config->has("resources"))
{
global_context->getResourceManager()->updateConfiguration(*config);
}
if (!initial_loading)
{
/// We do not load ZooKeeper configuration on the first config loading
/// because TestKeeper server is not started yet.
if (zkutil::hasZooKeeperConfig(*config))
global_context->reloadZooKeeperIfChanged(config);
global_context->reloadAuxiliaryZooKeepersConfigIfChanged(config);
global_context->reloadQueryMaskingRulesIfChanged(config);
if (global_context->isServerCompletelyStarted())
{
std::lock_guard lock(servers_lock);
updateServers(*config, server_pool, async_metrics, servers, servers_to_start_before_tables);
}
}
global_context->updateStorageConfiguration(*config);
global_context->updateInterserverCredentials(*config);
global_context->updateUncompressedCacheConfiguration(*config);
global_context->updateMarkCacheConfiguration(*config);
global_context->updateIndexUncompressedCacheConfiguration(*config);
global_context->updateIndexMarkCacheConfiguration(*config);
global_context->updateMMappedFileCacheConfiguration(*config);
global_context->updateQueryCacheConfiguration(*config);
CompressionCodecEncrypted::Configuration::instance().tryLoad(*config, "encryption_codecs");
#if USE_SSL
CertificateReloader::instance().tryLoad(*config);
#endif
NamedCollectionUtils::reloadFromConfig(*config);
FileCacheFactory::instance().updateSettingsFromConfig(*config);
HTTPConnectionPools::instance().setLimits(
HTTPConnectionPools::Limits{
new_server_settings.disk_connections_soft_limit,
new_server_settings.disk_connections_warn_limit,
new_server_settings.disk_connections_store_limit,
},
HTTPConnectionPools::Limits{
new_server_settings.storage_connections_soft_limit,
new_server_settings.storage_connections_warn_limit,
new_server_settings.storage_connections_store_limit,
},
HTTPConnectionPools::Limits{
new_server_settings.http_connections_soft_limit,
new_server_settings.http_connections_warn_limit,
new_server_settings.http_connections_store_limit,
});
if (global_context->isServerCompletelyStarted())
CannotAllocateThreadFaultInjector::setFaultProbability(new_server_settings.cannot_allocate_thread_fault_injection_probability);
ProfileEvents::increment(ProfileEvents::MainConfigLoads);
/// Must be the last.
latest_config = config;
},
/* already_loaded = */ false); /// Reload it right now (initial loading)
const auto listen_hosts = getListenHosts(config());
const auto interserver_listen_hosts = getInterserverListenHosts(config());
const auto listen_try = getListenTry(config());
if (config().has("keeper_server.server_id"))
{
#if USE_NURAFT
//// If we don't have configured connection probably someone trying to use clickhouse-server instead
//// of clickhouse-keeper, so start synchronously.
bool can_initialize_keeper_async = false;
if (has_zookeeper) /// We have configured connection to some zookeeper cluster
{
/// If we cannot connect to some other node from our cluster then we have to wait our Keeper start
/// synchronously.
can_initialize_keeper_async = global_context->tryCheckClientConnectionToMyKeeperCluster();
}
/// Initialize keeper RAFT.
global_context->initializeKeeperDispatcher(can_initialize_keeper_async);
FourLetterCommandFactory::registerCommands(*global_context->getKeeperDispatcher());
auto config_getter = [this] () -> const Poco::Util::AbstractConfiguration &
{
return global_context->getConfigRef();
};
for (const auto & listen_host : listen_hosts)
{
/// TCP Keeper
const char * port_name = "keeper_server.tcp_port";
createServer(
config(), listen_host, port_name, listen_try, /* start_server: */ false,
servers_to_start_before_tables,
[&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config(), socket, listen_host, port);
socket.setReceiveTimeout(Poco::Timespan(config().getUInt64("keeper_server.socket_receive_timeout_sec", DBMS_DEFAULT_RECEIVE_TIMEOUT_SEC), 0));
socket.setSendTimeout(Poco::Timespan(config().getUInt64("keeper_server.socket_send_timeout_sec", DBMS_DEFAULT_SEND_TIMEOUT_SEC), 0));
return ProtocolServerAdapter(
listen_host,
port_name,
"Keeper (tcp): " + address.toString(),
std::make_unique<TCPServer>(
new KeeperTCPHandlerFactory(
config_getter, global_context->getKeeperDispatcher(),
global_context->getSettingsRef().receive_timeout.totalSeconds(),
global_context->getSettingsRef().send_timeout.totalSeconds(),
false), server_pool, socket));
});
const char * secure_port_name = "keeper_server.tcp_port_secure";
createServer(
config(), listen_host, secure_port_name, listen_try, /* start_server: */ false,
servers_to_start_before_tables,
[&](UInt16 port) -> ProtocolServerAdapter
{
#if USE_SSL
Poco::Net::SecureServerSocket socket;
auto address = socketBindListen(config(), socket, listen_host, port, /* secure = */ true);
socket.setReceiveTimeout(Poco::Timespan(config().getUInt64("keeper_server.socket_receive_timeout_sec", DBMS_DEFAULT_RECEIVE_TIMEOUT_SEC), 0));
socket.setSendTimeout(Poco::Timespan(config().getUInt64("keeper_server.socket_send_timeout_sec", DBMS_DEFAULT_SEND_TIMEOUT_SEC), 0));
return ProtocolServerAdapter(
listen_host,
secure_port_name,
"Keeper with secure protocol (tcp_secure): " + address.toString(),
std::make_unique<TCPServer>(
new KeeperTCPHandlerFactory(
config_getter, global_context->getKeeperDispatcher(),
global_context->getSettingsRef().receive_timeout.totalSeconds(),
global_context->getSettingsRef().send_timeout.totalSeconds(), true), server_pool, socket));
#else
UNUSED(port);
throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "SSL support for TCP protocol is disabled because Poco library was built without NetSSL support.");
#endif
});
/// HTTP control endpoints
port_name = "keeper_server.http_control.port";
createServer(config(), listen_host, port_name, listen_try, /* start_server: */ false,
servers_to_start_before_tables,
[&](UInt16 port) -> ProtocolServerAdapter
{
auto http_context = httpContext();
Poco::Timespan keep_alive_timeout(config().getUInt("keep_alive_timeout", 10), 0);
Poco::Net::HTTPServerParams::Ptr http_params = new Poco::Net::HTTPServerParams;
http_params->setTimeout(http_context->getReceiveTimeout());
http_params->setKeepAliveTimeout(keep_alive_timeout);
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config(), socket, listen_host, port);
socket.setReceiveTimeout(http_context->getReceiveTimeout());
socket.setSendTimeout(http_context->getSendTimeout());
return ProtocolServerAdapter(
listen_host,
port_name,
"HTTP Control: http://" + address.toString(),
std::make_unique<HTTPServer>(
std::move(http_context),
createKeeperHTTPControlMainHandlerFactory(
config_getter(),
global_context->getKeeperDispatcher(),
"KeeperHTTPControlHandler-factory"), server_pool, socket, http_params));
});
}
#else
throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "ClickHouse server built without NuRaft library. Cannot use internal coordination.");
#endif
}
{
std::lock_guard lock(servers_lock);
/// We should start interserver communications before (and more important shutdown after) tables.
/// Because server can wait for a long-running queries (for example in tcp_handler) after interserver handler was already shut down.
/// In this case we will have replicated tables which are unable to send any parts to other replicas, but still can
/// communicate with zookeeper, execute merges, etc.
createInterserverServers(
config(),
interserver_listen_hosts,
listen_try,
server_pool,
async_metrics,
servers_to_start_before_tables,
/* start_servers= */ false);
for (auto & server : servers_to_start_before_tables)
{
server.start();
LOG_INFO(log, "Listening for {}", server.getDescription());
}
}
/// Initialize access storages.
auto & access_control = global_context->getAccessControl();
try
{
access_control.setUpFromMainConfig(config(), config_path, [&] { return global_context->getZooKeeper(); });
}
catch (...)
{
tryLogCurrentException(log, "Caught exception while setting up access control.");
throw;
}
if (cgroups_memory_usage_observer)
{
cgroups_memory_usage_observer->setOnMemoryAmountAvailableChangedFn([&]() { main_config_reloader->reload(); });
cgroups_memory_usage_observer->startThread();
}
/// Reload config in SYSTEM RELOAD CONFIG query.
global_context->setConfigReloadCallback([&]()
{
main_config_reloader->reload();
access_control.reload(AccessControl::ReloadMode::USERS_CONFIG_ONLY);
});
global_context->setStopServersCallback([&](const ServerType & server_type)
{
std::lock_guard lock(servers_lock);
stopServers(servers, server_type);
});
global_context->setStartServersCallback([&](const ServerType & server_type)
{
std::lock_guard lock(servers_lock);
createServers(
config(),
listen_hosts,
listen_try,
server_pool,
async_metrics,
servers,
/* start_servers= */ true,
server_type);
});
/// Limit on total number of concurrently executed queries.
global_context->getProcessList().setMaxSize(server_settings.max_concurrent_queries);
/// Load global settings from default_profile and system_profile.
global_context->setDefaultProfiles(config());
/// Initialize background executors after we load default_profile config.
/// This is needed to load proper values of background_pool_size etc.
global_context->initializeBackgroundExecutorsIfNeeded();
if (server_settings.async_insert_threads)
{
global_context->setAsynchronousInsertQueue(std::make_shared<AsynchronousInsertQueue>(
global_context,
server_settings.async_insert_threads,
server_settings.async_insert_queue_flush_on_shutdown));
}
/// Set path for format schema files
fs::path format_schema_path(config().getString("format_schema_path", path / "format_schemas/"));
global_context->setFormatSchemaPath(format_schema_path);
fs::create_directories(format_schema_path);
/// Set the path for google proto files
if (config().has("google_protos_path"))
global_context->setGoogleProtosPath(fs::weakly_canonical(config().getString("google_protos_path")));
/// Set path for filesystem caches
fs::path filesystem_caches_path(config().getString("filesystem_caches_path", ""));
if (!filesystem_caches_path.empty())
global_context->setFilesystemCachesPath(filesystem_caches_path);
/// Check sanity of MergeTreeSettings on server startup
{
size_t background_pool_tasks = global_context->getMergeMutateExecutor()->getMaxTasksCount();
global_context->getMergeTreeSettings().sanityCheck(background_pool_tasks);
global_context->getReplicatedMergeTreeSettings().sanityCheck(background_pool_tasks);
}
/// try set up encryption. There are some errors in config, error will be printed and server wouldn't start.
CompressionCodecEncrypted::Configuration::instance().load(config(), "encryption_codecs");
/// DNSCacheUpdater uses BackgroundSchedulePool which lives in shared context
/// and thus this object must be created after the SCOPE_EXIT object where shared
/// context is destroyed.
/// In addition this object has to be created before the loading of the tables.
std::unique_ptr<DNSCacheUpdater> dns_cache_updater;
if (server_settings.disable_internal_dns_cache)
{
/// Disable DNS caching at all
DNSResolver::instance().setDisableCacheFlag();
LOG_DEBUG(log, "DNS caching disabled");
}
else
{
DNSResolver::instance().setCacheMaxEntries(server_settings.dns_cache_max_entries);
/// Initialize a watcher periodically updating DNS cache
dns_cache_updater = std::make_unique<DNSCacheUpdater>(
global_context, server_settings.dns_cache_update_period, server_settings.dns_max_consecutive_failures);
}
if (dns_cache_updater)
dns_cache_updater->start();
/// Set current database name before loading tables and databases because
/// system logs may copy global context.
global_context->setCurrentDatabaseNameInGlobalContext(default_database);
LOG_INFO(log, "Loading metadata from {}", path_str);
LoadTaskPtrs load_metadata_tasks;
// Make sure that if exception is thrown during startup async, new async loading jobs are not going to be called.
// This is important for the case when exception is thrown from loading of metadata with `async_load_databases = false`
// to avoid simultaneously running table startups and destructing databases.
SCOPE_EXIT_SAFE(
LOG_INFO(log, "Stopping AsyncLoader.");
// Waits for all currently running jobs to finish and do not run any other pending jobs.
global_context->getAsyncLoader().stop();
);
try
{
auto & database_catalog = DatabaseCatalog::instance();
/// We load temporary database first, because projections need it.
database_catalog.initializeAndLoadTemporaryDatabase();
auto system_startup_tasks = loadMetadataSystem(global_context);
maybeConvertSystemDatabase(global_context, system_startup_tasks);
/// This has to be done before the initialization of system logs,
/// otherwise there is a race condition between the system database initialization
/// and creation of new tables in the database.
waitLoad(TablesLoaderForegroundPoolId, system_startup_tasks);
/// After attaching system databases we can initialize system log.
global_context->initializeSystemLogs();
global_context->setSystemZooKeeperLogAfterInitializationIfNeeded();
/// Build loggers before tables startup to make log messages from tables
/// attach available in system.text_log
buildLoggers(config(), logger());
initializeAzureSDKLogger(server_settings, logger().getLevel());
/// After the system database is created, attach virtual system tables (in addition to query_log and part_log)
attachSystemTablesServer(global_context, *database_catalog.getSystemDatabase(), has_zookeeper);
attachInformationSchema(global_context, *database_catalog.getDatabase(DatabaseCatalog::INFORMATION_SCHEMA));
attachInformationSchema(global_context, *database_catalog.getDatabase(DatabaseCatalog::INFORMATION_SCHEMA_UPPERCASE));
/// Firstly remove partially dropped databases, to avoid race with MaterializedMySQLSyncThread,
/// that may execute DROP before loadMarkedAsDroppedTables() in background,
/// and so loadMarkedAsDroppedTables() will find it and try to add, and UUID will overlap.
database_catalog.loadMarkedAsDroppedTables();
database_catalog.createBackgroundTasks();
/// Then, load remaining databases (some of them maybe be loaded asynchronously)
load_metadata_tasks = loadMetadata(global_context, default_database, server_settings.async_load_databases);
/// If we need to convert database engines, disable async tables loading
convertDatabasesEnginesIfNeed(load_metadata_tasks, global_context);
database_catalog.startupBackgroundTasks();
/// After loading validate that default database exists
database_catalog.assertDatabaseExists(default_database);
/// Load user-defined SQL functions.
global_context->getUserDefinedSQLObjectsStorage().loadObjects();
}
catch (...)
{
tryLogCurrentException(log, "Caught exception while loading metadata");
throw;
}
LOG_DEBUG(log, "Loaded metadata.");
/// Init trace collector only after trace_log system table was created
/// Disable it if we collect test coverage information, because it will work extremely slow.
#if !WITH_COVERAGE
/// Profilers cannot work reliably with any other libunwind or without PHDR cache.
if (hasPHDRCache())
{
global_context->initializeTraceCollector();
/// Set up server-wide memory profiler (for total memory tracker).
if (server_settings.total_memory_profiler_step)
{
total_memory_tracker.setProfilerStep(server_settings.total_memory_profiler_step);
}
if (server_settings.total_memory_tracker_sample_probability > 0.0)
{
total_memory_tracker.setSampleProbability(server_settings.total_memory_tracker_sample_probability);
}
if (server_settings.total_memory_profiler_sample_min_allocation_size)
{
total_memory_tracker.setSampleMinAllocationSize(server_settings.total_memory_profiler_sample_min_allocation_size);
}
if (server_settings.total_memory_profiler_sample_max_allocation_size)
{
total_memory_tracker.setSampleMaxAllocationSize(server_settings.total_memory_profiler_sample_max_allocation_size);
}
}
#endif
/// Describe multiple reasons when query profiler cannot work.
#if WITH_COVERAGE
LOG_INFO(log, "Query Profiler and TraceCollector are disabled because they work extremely slow with test coverage.");
#endif
#if defined(SANITIZER)
LOG_INFO(log, "Query Profiler disabled because they cannot work under sanitizers"
" when two different stack unwinding methods will interfere with each other.");
#endif
if (!hasPHDRCache())
LOG_INFO(log, "Query Profiler and TraceCollector are disabled because they require PHDR cache to be created"
" (otherwise the function 'dl_iterate_phdr' is not lock free and not async-signal safe).");
#if defined(OS_LINUX)
auto tasks_stats_provider = TasksStatsCounters::findBestAvailableProvider();
if (tasks_stats_provider == TasksStatsCounters::MetricsProvider::None)
{
LOG_INFO(log, "It looks like this system does not have procfs mounted at /proc location,"
" neither clickhouse-server process has CAP_NET_ADMIN capability."
" 'taskstats' performance statistics will be disabled."
" It could happen due to incorrect ClickHouse package installation."
" You can try to resolve the problem manually with 'sudo setcap cap_net_admin=+ep {}'."
" Note that it will not work on 'nosuid' mounted filesystems."
" It also doesn't work if you run clickhouse-server inside network namespace as it happens in some containers.",
executable_path);
}
else
{
LOG_INFO(log, "Tasks stats provider: {}", TasksStatsCounters::metricsProviderString(tasks_stats_provider));
}
if (!hasLinuxCapability(CAP_SYS_NICE))
{
LOG_INFO(log, "It looks like the process has no CAP_SYS_NICE capability, the setting 'os_thread_priority' will have no effect."
" It could happen due to incorrect ClickHouse package installation."
" You could resolve the problem manually with 'sudo setcap cap_sys_nice=+ep {}'."
" Note that it will not work on 'nosuid' mounted filesystems.",
executable_path);
}
#else
LOG_INFO(log, "TaskStats is not implemented for this OS. IO accounting will be disabled.");
#endif
{
attachSystemTablesAsync(global_context, *DatabaseCatalog::instance().getSystemDatabase(), async_metrics);
{
std::lock_guard lock(servers_lock);
createServers(config(), listen_hosts, listen_try, server_pool, async_metrics, servers);
if (servers.empty())
throw Exception(ErrorCodes::NO_ELEMENTS_IN_CONFIG,
"No servers started (add valid listen_host and 'tcp_port' or 'http_port' "
"to configuration file.)");
}
if (servers.empty())
throw Exception(ErrorCodes::NO_ELEMENTS_IN_CONFIG,
"No servers started (add valid listen_host and 'tcp_port' or 'http_port' "
"to configuration file.)");
#if USE_SSL
CertificateReloader::instance().tryLoad(config());
#endif
/// Must be done after initialization of `servers`, because async_metrics will access `servers` variable from its thread.
async_metrics.start();
global_context->setAsynchronousMetrics(&async_metrics);
main_config_reloader->start();
access_control.startPeriodicReloading();
/// try to load dictionaries immediately, throw on error and die
try
{
global_context->loadOrReloadDictionaries(config());
if (!config().getBool("dictionaries_lazy_load", true) && config().getBool("wait_dictionaries_load_at_startup", true))
global_context->waitForDictionariesLoad();
}
catch (...)
{
tryLogCurrentException(log, "Caught exception while loading dictionaries.");
throw;
}
/// try to load embedded dictionaries immediately, throw on error and die
try
{
global_context->tryCreateEmbeddedDictionaries(config());
}
catch (...)
{
tryLogCurrentException(log, "Caught exception while loading embedded dictionaries.");
throw;
}
/// try to load user defined executable functions, throw on error and die
try
{
global_context->loadOrReloadUserDefinedExecutableFunctions(config());
}
catch (...)
{
tryLogCurrentException(log, "Caught exception while loading user defined executable functions.");
throw;
}
if (has_zookeeper && config().has("distributed_ddl"))
{
/// DDL worker should be started after all tables were loaded
String ddl_zookeeper_path = config().getString("distributed_ddl.path", "/clickhouse/task_queue/ddl/");
int pool_size = config().getInt("distributed_ddl.pool_size", 1);
if (pool_size < 1)
throw Exception(ErrorCodes::ARGUMENT_OUT_OF_BOUND, "distributed_ddl.pool_size should be greater then 0");
global_context->setDDLWorker(std::make_unique<DDLWorker>(pool_size, ddl_zookeeper_path, global_context, &config(),
"distributed_ddl", "DDLWorker",
&CurrentMetrics::MaxDDLEntryID, &CurrentMetrics::MaxPushedDDLEntryID),
load_metadata_tasks);
}
if (config().has(DB::PlacementInfo::PLACEMENT_CONFIG_PREFIX))
{
PlacementInfo::PlacementInfo::instance().initialize(config());
}
/// Do not keep tasks in server, they should be kept inside databases. Used here to make dependent tasks only.
load_metadata_tasks.clear();
load_metadata_tasks.shrink_to_fit();
{
std::lock_guard lock(servers_lock);
for (auto & server : servers)
{
server.start();
LOG_INFO(log, "Listening for {}", server.getDescription());
}
global_context->setServerCompletelyStarted();
LOG_INFO(log, "Ready for connections.");
}
startup_watch.stop();
ProfileEvents::increment(ProfileEvents::ServerStartupMilliseconds, startup_watch.elapsedMilliseconds());
CannotAllocateThreadFaultInjector::setFaultProbability(server_settings.cannot_allocate_thread_fault_injection_probability);
try
{
global_context->startClusterDiscovery();
}
catch (...)
{
tryLogCurrentException(log, "Caught exception while starting cluster discovery");
}
#if defined(OS_LINUX)
/// Tell the service manager that service startup is finished.
/// NOTE: the parent clickhouse-watchdog process must do systemdNotify("MAINPID={}\n", child_pid); before
/// the child process notifies 'READY=1'.
systemdNotify("READY=1\n");
#endif
SCOPE_EXIT_SAFE({
LOG_DEBUG(log, "Received termination signal.");
/// Stop reloading of the main config. This must be done before everything else because it
/// can try to access/modify already deleted objects.
/// E.g. it can recreate new servers or it may pass a changed config to some destroyed parts of ContextSharedPart.
main_config_reloader.reset();
access_control.stopPeriodicReloading();
is_cancelled = true;
LOG_DEBUG(log, "Waiting for current connections to close.");
size_t current_connections = 0;
{
std::lock_guard lock(servers_lock);
for (auto & server : servers)
{
server.stop();
current_connections += server.currentConnections();
}
}
if (current_connections)
LOG_WARNING(log, "Closed all listening sockets. Waiting for {} outstanding connections.", current_connections);
else
LOG_INFO(log, "Closed all listening sockets.");
/// Wait for unfinished backups and restores.
/// This must be done after closing listening sockets (no more backups/restores) but before ProcessList::killAllQueries
/// (because killAllQueries() will cancel all running backups/restores).
if (server_settings.shutdown_wait_backups_and_restores)
global_context->waitAllBackupsAndRestores();
/// Killing remaining queries.
if (!server_settings.shutdown_wait_unfinished_queries)
global_context->getProcessList().killAllQueries();
if (current_connections)
current_connections = waitServersToFinish(servers, servers_lock, server_settings.shutdown_wait_unfinished);
if (current_connections)
LOG_WARNING(log, "Closed connections. But {} remain."
" Tip: To increase wait time add to config: <shutdown_wait_unfinished>60</shutdown_wait_unfinished>", current_connections);
else
LOG_INFO(log, "Closed connections.");
dns_cache_updater.reset();
if (current_connections)
{
/// There is no better way to force connections to close in Poco.
/// Otherwise connection handlers will continue to live
/// (they are effectively dangling objects, but they use global thread pool
/// and global thread pool destructor will wait for threads, preventing server shutdown).
/// Dump coverage here, because std::atexit callback would not be called.
dumpCoverageReportIfPossible();
LOG_WARNING(log, "Will shutdown forcefully.");
safeExit(0);
}
});
std::vector<std::unique_ptr<MetricsTransmitter>> metrics_transmitters;
for (const auto & graphite_key : DB::getMultipleKeysFromConfig(config(), "", "graphite"))
{
metrics_transmitters.emplace_back(std::make_unique<MetricsTransmitter>(
global_context->getConfigRef(), graphite_key, async_metrics));
}
waitForTerminationRequest();
}
return Application::EXIT_OK;
}
catch (...)
{
/// Poco does not provide stacktrace.
tryLogCurrentException("Application");
auto code = getCurrentExceptionCode();
return code ? code : -1;
}
std::unique_ptr<TCPProtocolStackFactory> Server::buildProtocolStackFromConfig(
const Poco::Util::AbstractConfiguration & config,
const std::string & protocol,
Poco::Net::HTTPServerParams::Ptr http_params,
AsynchronousMetrics & async_metrics,
bool & is_secure)
{
auto create_factory = [&](const std::string & type, const std::string & conf_name) -> TCPServerConnectionFactory::Ptr
{
if (type == "tcp")
return TCPServerConnectionFactory::Ptr(new TCPHandlerFactory(*this, false, false, ProfileEvents::InterfaceNativeReceiveBytes, ProfileEvents::InterfaceNativeSendBytes));
if (type == "tls")
#if USE_SSL
return TCPServerConnectionFactory::Ptr(new TLSHandlerFactory(*this, conf_name));
#else
throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "SSL support for TCP protocol is disabled because Poco library was built without NetSSL support.");
#endif
if (type == "proxy1")
return TCPServerConnectionFactory::Ptr(new ProxyV1HandlerFactory(*this, conf_name));
if (type == "mysql")
return TCPServerConnectionFactory::Ptr(new MySQLHandlerFactory(*this, ProfileEvents::InterfaceMySQLReceiveBytes, ProfileEvents::InterfaceMySQLSendBytes));
if (type == "postgres")
return TCPServerConnectionFactory::Ptr(new PostgreSQLHandlerFactory(*this, ProfileEvents::InterfacePostgreSQLReceiveBytes, ProfileEvents::InterfacePostgreSQLSendBytes));
if (type == "http")
return TCPServerConnectionFactory::Ptr(
new HTTPServerConnectionFactory(httpContext(), http_params, createHandlerFactory(*this, config, async_metrics, "HTTPHandler-factory"), ProfileEvents::InterfaceHTTPReceiveBytes, ProfileEvents::InterfaceHTTPSendBytes)
);
if (type == "prometheus")
return TCPServerConnectionFactory::Ptr(
new HTTPServerConnectionFactory(httpContext(), http_params, createHandlerFactory(*this, config, async_metrics, "PrometheusHandler-factory"), ProfileEvents::InterfacePrometheusReceiveBytes, ProfileEvents::InterfacePrometheusSendBytes)
);
if (type == "interserver")
return TCPServerConnectionFactory::Ptr(
new HTTPServerConnectionFactory(httpContext(), http_params, createHandlerFactory(*this, config, async_metrics, "InterserverIOHTTPHandler-factory"), ProfileEvents::InterfaceInterserverReceiveBytes, ProfileEvents::InterfaceInterserverSendBytes)
);
throw Exception(ErrorCodes::INVALID_CONFIG_PARAMETER, "Protocol configuration error, unknown protocol name '{}'", type);
};
std::string conf_name = "protocols." + protocol;
std::string prefix = conf_name + ".";
std::unordered_set<std::string> pset {conf_name};
auto stack = std::make_unique<TCPProtocolStackFactory>(*this, conf_name);
while (true)
{
// if there is no "type" - it's a reference to another protocol and this is just an endpoint
if (config.has(prefix + "type"))
{
std::string type = config.getString(prefix + "type");
if (type == "tls")
{
if (is_secure)
throw Exception(ErrorCodes::INVALID_CONFIG_PARAMETER, "Protocol '{}' contains more than one TLS layer", protocol);
is_secure = true;
}
stack->append(create_factory(type, conf_name));
}
if (!config.has(prefix + "impl"))
break;
conf_name = "protocols." + config.getString(prefix + "impl");
prefix = conf_name + ".";
if (!pset.insert(conf_name).second)
throw Exception(ErrorCodes::INVALID_CONFIG_PARAMETER, "Protocol '{}' configuration contains a loop on '{}'", protocol, conf_name);
}
return stack;
}
HTTPContextPtr Server::httpContext() const
{
return std::make_shared<HTTPContext>(context());
}
void Server::createServers(
Poco::Util::AbstractConfiguration & config,
const Strings & listen_hosts,
bool listen_try,
Poco::ThreadPool & server_pool,
AsynchronousMetrics & async_metrics,
std::vector<ProtocolServerAdapter> & servers,
bool start_servers,
const ServerType & server_type)
{
const Settings & settings = global_context->getSettingsRef();
Poco::Net::HTTPServerParams::Ptr http_params = new Poco::Net::HTTPServerParams;
http_params->setTimeout(settings.http_receive_timeout);
http_params->setKeepAliveTimeout(global_context->getServerSettings().keep_alive_timeout);
Poco::Util::AbstractConfiguration::Keys protocols;
config.keys("protocols", protocols);
for (const auto & protocol : protocols)
{
if (!server_type.shouldStart(ServerType::Type::CUSTOM, protocol))
continue;
std::string prefix = "protocols." + protocol + ".";
std::string port_name = prefix + "port";
std::string description {"<undefined> protocol"};
if (config.has(prefix + "description"))
description = config.getString(prefix + "description");
if (!config.has(prefix + "port"))
continue;
std::vector<std::string> hosts;
if (config.has(prefix + "host"))
hosts.push_back(config.getString(prefix + "host"));
else
hosts = listen_hosts;
for (const auto & host : hosts)
{
bool is_secure = false;
auto stack = buildProtocolStackFromConfig(config, protocol, http_params, async_metrics, is_secure);
if (stack->empty())
throw Exception(ErrorCodes::INVALID_CONFIG_PARAMETER, "Protocol '{}' stack empty", protocol);
createServer(config, host, port_name.c_str(), listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config, socket, host, port, is_secure);
socket.setReceiveTimeout(settings.receive_timeout);
socket.setSendTimeout(settings.send_timeout);
return ProtocolServerAdapter(
host,
port_name.c_str(),
description + ": " + address.toString(),
std::make_unique<TCPServer>(
stack.release(),
server_pool,
socket,
new Poco::Net::TCPServerParams));
});
}
}
for (const auto & listen_host : listen_hosts)
{
const char * port_name;
if (server_type.shouldStart(ServerType::Type::HTTP))
{
/// HTTP
port_name = "http_port";
createServer(config, listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config, socket, listen_host, port);
socket.setReceiveTimeout(settings.http_receive_timeout);
socket.setSendTimeout(settings.http_send_timeout);
return ProtocolServerAdapter(
listen_host,
port_name,
"http://" + address.toString(),
std::make_unique<HTTPServer>(
httpContext(), createHandlerFactory(*this, config, async_metrics, "HTTPHandler-factory"), server_pool, socket, http_params, ProfileEvents::InterfaceHTTPReceiveBytes, ProfileEvents::InterfaceHTTPSendBytes));
});
}
if (server_type.shouldStart(ServerType::Type::HTTPS))
{
/// HTTPS
port_name = "https_port";
createServer(config, listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
#if USE_SSL
Poco::Net::SecureServerSocket socket;
auto address = socketBindListen(config, socket, listen_host, port, /* secure = */ true);
socket.setReceiveTimeout(settings.http_receive_timeout);
socket.setSendTimeout(settings.http_send_timeout);
return ProtocolServerAdapter(
listen_host,
port_name,
"https://" + address.toString(),
std::make_unique<HTTPServer>(
httpContext(), createHandlerFactory(*this, config, async_metrics, "HTTPSHandler-factory"), server_pool, socket, http_params, ProfileEvents::InterfaceHTTPReceiveBytes, ProfileEvents::InterfaceHTTPSendBytes));
#else
UNUSED(port);
throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "HTTPS protocol is disabled because Poco library was built without NetSSL support.");
#endif
});
}
if (server_type.shouldStart(ServerType::Type::TCP))
{
/// TCP
port_name = "tcp_port";
createServer(config, listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config, socket, listen_host, port);
socket.setReceiveTimeout(settings.receive_timeout);
socket.setSendTimeout(settings.send_timeout);
return ProtocolServerAdapter(
listen_host,
port_name,
"native protocol (tcp): " + address.toString(),
std::make_unique<TCPServer>(
new TCPHandlerFactory(*this, /* secure */ false, /* proxy protocol */ false, ProfileEvents::InterfaceNativeReceiveBytes, ProfileEvents::InterfaceNativeSendBytes),
server_pool,
socket,
new Poco::Net::TCPServerParams));
});
}
if (server_type.shouldStart(ServerType::Type::TCP_WITH_PROXY))
{
/// TCP with PROXY protocol, see https://github.com/wolfeidau/proxyv2/blob/master/docs/proxy-protocol.txt
port_name = "tcp_with_proxy_port";
createServer(config, listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config, socket, listen_host, port);
socket.setReceiveTimeout(settings.receive_timeout);
socket.setSendTimeout(settings.send_timeout);
return ProtocolServerAdapter(
listen_host,
port_name,
"native protocol (tcp) with PROXY: " + address.toString(),
std::make_unique<TCPServer>(
new TCPHandlerFactory(*this, /* secure */ false, /* proxy protocol */ true, ProfileEvents::InterfaceNativeReceiveBytes, ProfileEvents::InterfaceNativeSendBytes),
server_pool,
socket,
new Poco::Net::TCPServerParams));
});
}
if (server_type.shouldStart(ServerType::Type::TCP_SECURE))
{
/// TCP with SSL
port_name = "tcp_port_secure";
createServer(config, listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
#if USE_SSL
Poco::Net::SecureServerSocket socket;
auto address = socketBindListen(config, socket, listen_host, port, /* secure = */ true);
socket.setReceiveTimeout(settings.receive_timeout);
socket.setSendTimeout(settings.send_timeout);
return ProtocolServerAdapter(
listen_host,
port_name,
"secure native protocol (tcp_secure): " + address.toString(),
std::make_unique<TCPServer>(
new TCPHandlerFactory(*this, /* secure */ true, /* proxy protocol */ false, ProfileEvents::InterfaceNativeReceiveBytes, ProfileEvents::InterfaceNativeSendBytes),
server_pool,
socket,
new Poco::Net::TCPServerParams));
#else
UNUSED(port);
throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "SSL support for TCP protocol is disabled because Poco library was built without NetSSL support.");
#endif
});
}
if (server_type.shouldStart(ServerType::Type::MYSQL))
{
port_name = "mysql_port";
createServer(config, listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config, socket, listen_host, port, /* secure = */ true);
socket.setReceiveTimeout(Poco::Timespan());
socket.setSendTimeout(settings.send_timeout);
return ProtocolServerAdapter(
listen_host,
port_name,
"MySQL compatibility protocol: " + address.toString(),
std::make_unique<TCPServer>(new MySQLHandlerFactory(*this, ProfileEvents::InterfaceMySQLReceiveBytes, ProfileEvents::InterfaceMySQLSendBytes), server_pool, socket, new Poco::Net::TCPServerParams));
});
}
if (server_type.shouldStart(ServerType::Type::POSTGRESQL))
{
port_name = "postgresql_port";
createServer(config, listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config, socket, listen_host, port, /* secure = */ true);
socket.setReceiveTimeout(Poco::Timespan());
socket.setSendTimeout(settings.send_timeout);
return ProtocolServerAdapter(
listen_host,
port_name,
"PostgreSQL compatibility protocol: " + address.toString(),
std::make_unique<TCPServer>(new PostgreSQLHandlerFactory(*this, ProfileEvents::InterfacePostgreSQLReceiveBytes, ProfileEvents::InterfacePostgreSQLSendBytes), server_pool, socket, new Poco::Net::TCPServerParams));
});
}
#if USE_GRPC
if (server_type.shouldStart(ServerType::Type::GRPC))
{
port_name = "grpc_port";
createServer(config, listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::SocketAddress server_address(listen_host, port);
return ProtocolServerAdapter(
listen_host,
port_name,
"gRPC protocol: " + server_address.toString(),
std::make_unique<GRPCServer>(*this, makeSocketAddress(listen_host, port, &logger())));
});
}
#endif
if (server_type.shouldStart(ServerType::Type::PROMETHEUS))
{
/// Prometheus (if defined and not setup yet with http_port)
port_name = "prometheus.port";
createServer(config, listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config, socket, listen_host, port);
socket.setReceiveTimeout(settings.http_receive_timeout);
socket.setSendTimeout(settings.http_send_timeout);
return ProtocolServerAdapter(
listen_host,
port_name,
"Prometheus: http://" + address.toString(),
std::make_unique<HTTPServer>(
httpContext(), createHandlerFactory(*this, config, async_metrics, "PrometheusHandler-factory"), server_pool, socket, http_params, ProfileEvents::InterfacePrometheusReceiveBytes, ProfileEvents::InterfacePrometheusSendBytes));
});
}
}
}
void Server::createInterserverServers(
Poco::Util::AbstractConfiguration & config,
const Strings & interserver_listen_hosts,
bool listen_try,
Poco::ThreadPool & server_pool,
AsynchronousMetrics & async_metrics,
std::vector<ProtocolServerAdapter> & servers,
bool start_servers,
const ServerType & server_type)
{
const Settings & settings = global_context->getSettingsRef();
Poco::Net::HTTPServerParams::Ptr http_params = new Poco::Net::HTTPServerParams;
http_params->setTimeout(settings.http_receive_timeout);
http_params->setKeepAliveTimeout(global_context->getServerSettings().keep_alive_timeout);
/// Now iterate over interserver_listen_hosts
for (const auto & interserver_listen_host : interserver_listen_hosts)
{
const char * port_name;
if (server_type.shouldStart(ServerType::Type::INTERSERVER_HTTP))
{
/// Interserver IO HTTP
port_name = "interserver_http_port";
createServer(config, interserver_listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
Poco::Net::ServerSocket socket;
auto address = socketBindListen(config, socket, interserver_listen_host, port);
socket.setReceiveTimeout(settings.http_receive_timeout);
socket.setSendTimeout(settings.http_send_timeout);
return ProtocolServerAdapter(
interserver_listen_host,
port_name,
"replica communication (interserver): http://" + address.toString(),
std::make_unique<HTTPServer>(
httpContext(),
createHandlerFactory(*this, config, async_metrics, "InterserverIOHTTPHandler-factory"),
server_pool,
socket,
http_params,
ProfileEvents::InterfaceInterserverReceiveBytes,
ProfileEvents::InterfaceInterserverSendBytes));
});
}
if (server_type.shouldStart(ServerType::Type::INTERSERVER_HTTPS))
{
port_name = "interserver_https_port";
createServer(config, interserver_listen_host, port_name, listen_try, start_servers, servers, [&](UInt16 port) -> ProtocolServerAdapter
{
#if USE_SSL
Poco::Net::SecureServerSocket socket;
auto address = socketBindListen(config, socket, interserver_listen_host, port, /* secure = */ true);
socket.setReceiveTimeout(settings.http_receive_timeout);
socket.setSendTimeout(settings.http_send_timeout);
return ProtocolServerAdapter(
interserver_listen_host,
port_name,
"secure replica communication (interserver): https://" + address.toString(),
std::make_unique<HTTPServer>(
httpContext(),
createHandlerFactory(*this, config, async_metrics, "InterserverIOHTTPSHandler-factory"),
server_pool,
socket,
http_params,
ProfileEvents::InterfaceInterserverReceiveBytes,
ProfileEvents::InterfaceInterserverSendBytes));
#else
UNUSED(port);
throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "SSL support for TCP protocol is disabled because Poco library was built without NetSSL support.");
#endif
});
}
}
}
void Server::stopServers(
std::vector<ProtocolServerAdapter> & servers,
const ServerType & server_type
) const
{
LoggerRawPtr log = &logger();
/// Remove servers once all their connections are closed
auto check_server = [&log](const char prefix[], auto & server)
{
if (!server.isStopping())
return false;
size_t current_connections = server.currentConnections();
LOG_DEBUG(log, "Server {}{}: {} ({} connections)",
server.getDescription(),
prefix,
!current_connections ? "finished" : "waiting",
current_connections);
return !current_connections;
};
std::erase_if(servers, std::bind_front(check_server, " (from one of previous remove)"));
for (auto & server : servers)
{
if (!server.isStopping())
{
const std::string server_port_name = server.getPortName();
if (server_type.shouldStop(server_port_name))
server.stop();
}
}
std::erase_if(servers, std::bind_front(check_server, ""));
}
void Server::updateServers(
Poco::Util::AbstractConfiguration & config,
Poco::ThreadPool & server_pool,
AsynchronousMetrics & async_metrics,
std::vector<ProtocolServerAdapter> & servers,
std::vector<ProtocolServerAdapter> & servers_to_start_before_tables)
{
LoggerRawPtr log = &logger();
const auto listen_hosts = getListenHosts(config);
const auto interserver_listen_hosts = getInterserverListenHosts(config);
const auto listen_try = getListenTry(config);
/// Remove servers once all their connections are closed
auto check_server = [&log](const char prefix[], auto & server)
{
if (!server.isStopping())
return false;
size_t current_connections = server.currentConnections();
LOG_DEBUG(log, "Server {}{}: {} ({} connections)",
server.getDescription(),
prefix,
!current_connections ? "finished" : "waiting",
current_connections);
return !current_connections;
};
std::erase_if(servers, std::bind_front(check_server, " (from one of previous reload)"));
Poco::Util::AbstractConfiguration & previous_config = latest_config ? *latest_config : this->config();
std::vector<ProtocolServerAdapter *> all_servers;
all_servers.reserve(servers.size() + servers_to_start_before_tables.size());
for (auto & server : servers)
all_servers.push_back(&server);
for (auto & server : servers_to_start_before_tables)
all_servers.push_back(&server);
for (auto * server : all_servers)
{
if (!server->isStopping())
{
std::string port_name = server->getPortName();
bool has_host = false;
bool is_http = false;
if (port_name.starts_with("protocols."))
{
std::string protocol = port_name.substr(0, port_name.find_last_of('.'));
has_host = config.has(protocol + ".host");
std::string conf_name = protocol;
std::string prefix = protocol + ".";
std::unordered_set<std::string> pset {conf_name};
while (true)
{
if (config.has(prefix + "type"))
{
std::string type = config.getString(prefix + "type");
if (type == "http")
{
is_http = true;
break;
}
}
if (!config.has(prefix + "impl"))
break;
conf_name = "protocols." + config.getString(prefix + "impl");
prefix = conf_name + ".";
if (!pset.insert(conf_name).second)
throw Exception(ErrorCodes::INVALID_CONFIG_PARAMETER, "Protocol '{}' configuration contains a loop on '{}'", protocol, conf_name);
}
}
else
{
/// NOTE: better to compare using getPortName() over using
/// dynamic_cast<> since HTTPServer is also used for prometheus and
/// internal replication communications.
is_http = server->getPortName() == "http_port" || server->getPortName() == "https_port";
}
if (!has_host)
has_host = std::find(listen_hosts.begin(), listen_hosts.end(), server->getListenHost()) != listen_hosts.end();
bool has_port = !config.getString(port_name, "").empty();
bool force_restart = is_http && !isSameConfiguration(previous_config, config, "http_handlers");
if (force_restart)
LOG_TRACE(log, "<http_handlers> had been changed, will reload {}", server->getDescription());
if (!has_host || !has_port || config.getInt(server->getPortName()) != server->portNumber() || force_restart)
{
server->stop();
LOG_INFO(log, "Stopped listening for {}", server->getDescription());
}
}
}
createServers(config, listen_hosts, listen_try, server_pool, async_metrics, servers, /* start_servers= */ true);
createInterserverServers(config, interserver_listen_hosts, listen_try, server_pool, async_metrics, servers_to_start_before_tables, /* start_servers= */ true);
std::erase_if(servers, std::bind_front(check_server, ""));
std::erase_if(servers_to_start_before_tables, std::bind_front(check_server, ""));
}
}
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