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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::kCommand
#include "mongo/platform/basic.h"
#include <set>
#include "mongo/db/audit.h"
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/read_concern_args.h"
#include "mongo/db/s/config/sharding_catalog_manager.h"
#include "mongo/s/catalog/type_database.h"
#include "mongo/s/catalog_cache.h"
#include "mongo/s/grid.h"
#include "mongo/util/log.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
using std::shared_ptr;
using std::set;
using std::string;
namespace {
/**
* Internal sharding command run on config servers to enable sharding on a database.
*/
class ConfigSvrEnableShardingCommand : public BasicCommand {
public:
ConfigSvrEnableShardingCommand() : BasicCommand("_configsvrEnableSharding") {}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kNever;
}
virtual bool adminOnly() const {
return true;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
std::string help() const override {
return "Internal command, which is exported by the sharding config server. Do not call "
"directly. Enable sharding on a database.";
}
virtual Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) const override {
if (!AuthorizationSession::get(client)->isAuthorizedForActionsOnResource(
ResourcePattern::forDatabaseName(parseNs(dbname, cmdObj)), ActionType::internal)) {
return Status(ErrorCodes::Unauthorized, "Unauthorized");
}
return Status::OK();
}
virtual std::string parseNs(const std::string& dbname, const BSONObj& cmdObj) const {
return cmdObj.firstElement().str();
}
bool run(OperationContext* opCtx,
const std::string& dbname_unused,
const BSONObj& cmdObj,
BSONObjBuilder& result) {
uassert(ErrorCodes::IllegalOperation,
"_configsvrEnableSharding can only be run on config servers",
serverGlobalParams.clusterRole == ClusterRole::ConfigServer);
// Set the operation context read concern level to local for reads into the config database.
repl::ReadConcernArgs::get(opCtx) =
repl::ReadConcernArgs(repl::ReadConcernLevel::kLocalReadConcern);
const std::string dbname = parseNs("", cmdObj);
uassert(
ErrorCodes::InvalidNamespace,
str::stream() << "invalid db name specified: " << dbname,
NamespaceString::validDBName(dbname, NamespaceString::DollarInDbNameBehavior::Allow));
if (dbname == NamespaceString::kAdminDb || dbname == NamespaceString::kLocalDb) {
uasserted(ErrorCodes::InvalidOptions,
str::stream() << "can't shard " + dbname + " database");
}
uassert(ErrorCodes::InvalidOptions,
str::stream() << "enableSharding must be called with majority writeConcern, got "
<< cmdObj,
opCtx->getWriteConcern().wMode == WriteConcernOptions::kMajority);
// Make sure to force update of any stale metadata
ON_BLOCK_EXIT([opCtx, dbname] { Grid::get(opCtx)->catalogCache()->purgeDatabase(dbname); });
auto dbDistLock =
uassertStatusOK(Grid::get(opCtx)->catalogClient()->getDistLockManager()->lock(
opCtx, dbname, "enableSharding", DistLockManager::kDefaultLockTimeout));
ShardingCatalogManager::get(opCtx)->enableSharding(opCtx, dbname);
audit::logEnableSharding(Client::getCurrent(), dbname);
return true;
}
} configsvrEnableShardingCmd;
} // namespace
} // namespace mongo
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