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/**
* Copyright (C) 2017 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/s/catalog/sharding_catalog_manager.h"
#include "mongo/db/namespace_string.h"
#include "mongo/s/catalog/sharding_catalog_client_impl.h"
#include "mongo/s/catalog/type_database.h"
#include "mongo/s/client/shard.h"
#include "mongo/s/grid.h"
#include "mongo/util/log.h"
namespace mongo {
Status ShardingCatalogManager::enableSharding(OperationContext* opCtx, const std::string& dbName) {
invariant(nsIsDbOnly(dbName));
if (dbName == NamespaceString::kConfigDb || dbName == NamespaceString::kAdminDb) {
return {
ErrorCodes::IllegalOperation,
str::stream() << "Enabling sharding on system configuration databases is not allowed"};
}
// Lock the database globally to prevent conflicts with simultaneous database
// creation/modification.
auto scopedDistLock = Grid::get(opCtx)->catalogClient()->getDistLockManager()->lock(
opCtx, dbName, "enableSharding", DistLockManager::kDefaultLockTimeout);
if (!scopedDistLock.isOK()) {
return scopedDistLock.getStatus();
}
// Check for case sensitivity violations
DatabaseType db;
Status status = Grid::get(opCtx)->catalogClient()->_checkDbDoesNotExist(opCtx, dbName, &db);
if (status.isOK()) {
// Database does not exist, create a new entry
auto newShardIdStatus = ShardingCatalogClientImpl::_selectShardForNewDatabase(
opCtx, Grid::get(opCtx)->shardRegistry());
if (!newShardIdStatus.isOK()) {
return newShardIdStatus.getStatus();
}
const ShardId& newShardId = newShardIdStatus.getValue();
log() << "Placing [" << dbName << "] on: " << newShardId;
db.setName(dbName);
db.setPrimary(newShardId);
db.setSharded(true);
} else if (status.code() == ErrorCodes::NamespaceExists) {
if (db.getSharded()) {
return Status::OK();
}
// Database exists, so just update it
db.setSharded(true);
} else {
return status;
}
log() << "Enabling sharding for database [" << dbName << "] in config db";
return Grid::get(opCtx)->catalogClient()->updateDatabase(opCtx, dbName, db);
}
} // namespace mongo
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