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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
#include "mongo/platform/basic.h"
#include "mongo/s/sharding_initialization.h"
#include <string>
#include "mongo/base/status.h"
#include "mongo/client/remote_command_targeter_factory_impl.h"
#include "mongo/db/audit.h"
#include "mongo/db/server_options.h"
#include "mongo/db/service_context.h"
#include "mongo/executor/network_interface_factory.h"
#include "mongo/executor/network_interface_thread_pool.h"
#include "mongo/executor/task_executor.h"
#include "mongo/executor/task_executor_pool.h"
#include "mongo/executor/thread_pool_task_executor.h"
#include "mongo/rpc/metadata/config_server_metadata.h"
#include "mongo/rpc/metadata/metadata_hook.h"
#include "mongo/s/balancer/balancer_configuration.h"
#include "mongo/s/client/shard_factory.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/client/sharding_network_connection_hook.h"
#include "mongo/s/grid.h"
#include "mongo/s/catalog/catalog_cache.h"
#include "mongo/s/catalog/replset/catalog_manager_replica_set.h"
#include "mongo/s/catalog/replset/dist_lock_catalog_impl.h"
#include "mongo/s/catalog/replset/replset_dist_lock_manager.h"
#include "mongo/s/query/cluster_cursor_manager.h"
#include "mongo/s/sharding_egress_metadata_hook.h"
#include "mongo/stdx/memory.h"
#include "mongo/util/exit.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace {
using executor::NetworkInterface;
using executor::NetworkInterfaceThreadPool;
using executor::TaskExecutorPool;
using executor::ThreadPoolTaskExecutor;
std::unique_ptr<ThreadPoolTaskExecutor> makeTaskExecutor(std::unique_ptr<NetworkInterface> net) {
auto netPtr = net.get();
return stdx::make_unique<ThreadPoolTaskExecutor>(
stdx::make_unique<NetworkInterfaceThreadPool>(netPtr), std::move(net));
}
std::unique_ptr<CatalogManager> makeCatalogManager(ServiceContext* service,
ShardRegistry* shardRegistry,
const HostAndPort& thisHost) {
std::unique_ptr<SecureRandom> rng(SecureRandom::create());
std::string distLockProcessId = str::stream()
<< thisHost.toString() << ':'
<< durationCount<Seconds>(service->getPreciseClockSource()->now().toDurationSinceEpoch())
<< ':' << static_cast<int32_t>(rng->nextInt64());
auto distLockCatalog = stdx::make_unique<DistLockCatalogImpl>(shardRegistry);
auto distLockManager =
stdx::make_unique<ReplSetDistLockManager>(service,
distLockProcessId,
std::move(distLockCatalog),
ReplSetDistLockManager::kDistLockPingInterval,
ReplSetDistLockManager::kDistLockExpirationTime);
return stdx::make_unique<CatalogManagerReplicaSet>(
std::move(distLockManager),
makeTaskExecutor(
executor::makeNetworkInterface("NetworkInterfaceASIO-AddShard-TaskExecutor")));
}
std::unique_ptr<TaskExecutorPool> makeTaskExecutorPool(
std::unique_ptr<NetworkInterface> fixedNet,
std::unique_ptr<rpc::EgressMetadataHook> metadataHook) {
std::vector<std::unique_ptr<executor::TaskExecutor>> executors;
for (size_t i = 0; i < TaskExecutorPool::getSuggestedPoolSize(); ++i) {
auto net = executor::makeNetworkInterface(
"NetworkInterfaceASIO-TaskExecutorPool-" + std::to_string(i),
stdx::make_unique<ShardingNetworkConnectionHook>(),
std::move(metadataHook));
auto netPtr = net.get();
auto exec = stdx::make_unique<ThreadPoolTaskExecutor>(
stdx::make_unique<NetworkInterfaceThreadPool>(netPtr), std::move(net));
executors.emplace_back(std::move(exec));
}
// Add executor used to perform non-performance critical work.
auto fixedNetPtr = fixedNet.get();
auto fixedExec = stdx::make_unique<ThreadPoolTaskExecutor>(
stdx::make_unique<NetworkInterfaceThreadPool>(fixedNetPtr), std::move(fixedNet));
auto executorPool = stdx::make_unique<TaskExecutorPool>();
executorPool->addExecutors(std::move(executors), std::move(fixedExec));
return executorPool;
}
} // namespace
Status initializeGlobalShardingState(const ConnectionString& configCS,
uint64_t maxChunkSizeBytes,
std::unique_ptr<ShardFactory> shardFactory,
rpc::ShardingEgressMetadataHookBuilder hookBuilder) {
if (configCS.type() == ConnectionString::INVALID) {
return {ErrorCodes::BadValue, "Unrecognized connection string."};
}
auto network =
executor::makeNetworkInterface("NetworkInterfaceASIO-ShardRegistry",
stdx::make_unique<ShardingNetworkConnectionHook>(),
hookBuilder());
auto networkPtr = network.get();
auto executorPool = makeTaskExecutorPool(std::move(network), hookBuilder());
executorPool->startup();
auto shardRegistry(stdx::make_unique<ShardRegistry>(std::move(shardFactory), configCS));
auto catalogManager = makeCatalogManager(getGlobalServiceContext(),
shardRegistry.get(),
HostAndPort(getHostName(), serverGlobalParams.port));
auto rawCatalogManager = catalogManager.get();
grid.init(
std::move(catalogManager),
stdx::make_unique<CatalogCache>(),
std::move(shardRegistry),
stdx::make_unique<ClusterCursorManager>(getGlobalServiceContext()->getPreciseClockSource()),
stdx::make_unique<BalancerConfiguration>(maxChunkSizeBytes),
std::move(executorPool),
networkPtr);
auto status = rawCatalogManager->startup();
if (!status.isOK()) {
return status;
}
return Status::OK();
}
Status reloadShardRegistryUntilSuccess(OperationContext* txn) {
if (serverGlobalParams.clusterRole == ClusterRole::ConfigServer) {
return Status::OK();
}
while (!inShutdown()) {
auto stopStatus = txn->checkForInterruptNoAssert();
if (!stopStatus.isOK()) {
return stopStatus;
}
try {
grid.shardRegistry()->reload(txn);
return Status::OK();
} catch (const DBException& ex) {
Status status = ex.toStatus();
if (status == ErrorCodes::ReplicaSetNotFound) {
// ReplicaSetNotFound most likely means we've been waiting for the config replica
// set to come up for so long that the ReplicaSetMonitor stopped monitoring the set.
// Rebuild the config shard to force the monitor to resume monitoring the config
// servers.
grid.shardRegistry()->rebuildConfigShard();
}
log() << "Error initializing sharding state, sleeping for 2 seconds and trying again"
<< causedBy(status);
sleepmillis(2000);
continue;
}
}
return {ErrorCodes::ShutdownInProgress, "aborting shard loading attempt"};
}
} // namespace mongo
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