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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/db/commands/server_status.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/s/active_migrations_registry.h"
#include "mongo/db/s/collection_sharding_state.h"
#include "mongo/db/s/metrics/sharding_data_transform_cumulative_metrics.h"
#include "mongo/db/s/range_deleter_service.h"
#include "mongo/db/s/sharding_state.h"
#include "mongo/db/s/sharding_statistics.h"
#include "mongo/db/server_feature_flags_gen.h"
#include "mongo/db/vector_clock.h"
#include "mongo/s/balancer_configuration.h"
#include "mongo/s/catalog_cache.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/grid.h"
#include "mongo/s/is_mongos.h"
#include "mongo/s/resharding/resharding_feature_flag_gen.h"
#include "mongo/s/sharding_feature_flags_gen.h"
namespace mongo {
namespace {
class ShardingServerStatus final : public ServerStatusSection {
public:
ShardingServerStatus() : ServerStatusSection("sharding") {}
bool includeByDefault() const override {
return isClusterNode();
}
BSONObj generateSection(OperationContext* opCtx,
const BSONElement& configElement) const override {
if (!isClusterNode())
return {};
auto const shardingState = ShardingState::get(opCtx);
if (!shardingState->enabled())
return {};
auto const grid = Grid::get(opCtx);
auto const shardRegistry = grid->shardRegistry();
BSONObjBuilder result;
result.append("configsvrConnectionString",
shardRegistry->getConfigServerConnectionString().toString());
const auto vcTime = VectorClock::get(opCtx)->getTime();
const auto configOpTime = [&]() {
const auto vcConfigTimeTs = vcTime.configTime().asTimestamp();
return mongo::repl::OpTime(vcConfigTimeTs, mongo::repl::OpTime::kUninitializedTerm);
}();
configOpTime.append(&result, "lastSeenConfigServerOpTime");
const auto topologyOpTime = [&]() {
const auto vcTopologyTimeTs = vcTime.topologyTime().asTimestamp();
return mongo::repl::OpTime(vcTopologyTimeTs, mongo::repl::OpTime::kUninitializedTerm);
}();
topologyOpTime.append(&result, "lastSeenTopologyOpTime");
const long long maxChunkSizeInBytes =
grid->getBalancerConfiguration()->getMaxChunkSizeBytes();
result.append("maxChunkSizeInBytes", maxChunkSizeInBytes);
// Get a migration status report if a migration is active. The call to
// getActiveMigrationStatusReport will take an IS lock on the namespace of the active
// migration if there is one that is active.
BSONObj migrationStatus =
ActiveMigrationsRegistry::get(opCtx).getActiveMigrationStatusReport(opCtx);
if (!migrationStatus.isEmpty()) {
result.append("migrations", migrationStatus);
}
return result.obj();
}
} shardingServerStatus;
class ShardingStatisticsServerStatus final : public ServerStatusSection {
public:
ShardingStatisticsServerStatus() : ServerStatusSection("shardingStatistics") {}
bool includeByDefault() const override {
return isClusterNode();
}
BSONObj generateSection(OperationContext* opCtx,
const BSONElement& configElement) const override {
if (!isClusterNode())
return {};
BSONObjBuilder result;
if (auto const shardingState = ShardingState::get(opCtx); shardingState->enabled()) {
auto const grid = Grid::get(opCtx);
auto const catalogCache = grid->catalogCache();
ShardingStatistics::get(opCtx).report(&result);
catalogCache->report(&result);
if (mongo::feature_flags::gRangeDeleterService.isEnabledAndIgnoreFCV()) {
auto nRangeDeletions = [&]() {
try {
return RangeDeleterService::get(opCtx)->totalNumOfRegisteredTasks();
} catch (const ExceptionFor<ErrorCodes::NotYetInitialized>&) {
return 0LL;
}
}();
result.appendNumber("rangeDeleterTasks", nRangeDeletions);
}
CollectionShardingState::appendInfoForServerStatus(opCtx, &result);
}
// To calculate the number of sharded collection we simply get the number of records from
// `config.collections` collection. This count must only be appended when serverStatus is
// invoked on the config server.
if (serverGlobalParams.clusterRole == ClusterRole::ConfigServer) {
AutoGetCollectionForReadLockFree autoColl(opCtx, CollectionType::ConfigNS);
const auto& collection = autoColl.getCollection();
const auto numShardedCollections = collection ? collection->numRecords(opCtx) : 0;
result.append("numShardedCollections", numShardedCollections);
}
reportDataTransformMetrics(opCtx, &result);
return result.obj();
}
void reportDataTransformMetrics(OperationContext* opCtx, BSONObjBuilder* bob) const {
auto sCtx = opCtx->getServiceContext();
using Metrics = ShardingDataTransformCumulativeMetrics;
// The serverStatus command is run before the FCV is initialized so we ignore it when
// checking whether the resharding and global index features are enabled here.
if (resharding::gFeatureFlagResharding.isEnabledAndIgnoreFCV()) {
Metrics::getForResharding(sCtx)->reportForServerStatus(bob);
}
if (gFeatureFlagGlobalIndexes.isEnabledAndIgnoreFCV()) {
Metrics::getForGlobalIndexes(sCtx)->reportForServerStatus(bob);
}
}
} shardingStatisticsServerStatus;
} // namespace
} // namespace mongo
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