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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 <vector>
#include "mongo/client/remote_command_targeter_mock.h"
#include "mongo/db/commands.h"
#include "mongo/db/query/query_request.h"
#include "mongo/executor/network_interface_mock.h"
#include "mongo/executor/task_executor.h"
#include "mongo/rpc/metadata/repl_set_metadata.h"
#include "mongo/rpc/metadata/server_selection_metadata.h"
#include "mongo/rpc/metadata/tracking_metadata.h"
#include "mongo/s/catalog/config_server_version.h"
#include "mongo/s/catalog/sharding_catalog_client_impl.h"
#include "mongo/s/catalog/type_config_version.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/cluster_identity_loader.h"
#include "mongo/s/sharding_test_fixture.h"
#include "mongo/stdx/future.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace {
using executor::NetworkInterfaceMock;
using executor::RemoteCommandRequest;
using executor::TaskExecutor;
using stdx::async;
using unittest::assertGet;
const BSONObj kReplSecondaryOkMetadata{[] {
BSONObjBuilder o;
o.appendElements(rpc::ServerSelectionMetadata(true, boost::none).toBSON());
o.append(rpc::kReplSetMetadataFieldName, 1);
return o.obj();
}()};
class ClusterIdentityTest : public ShardingTestFixture {
public:
void setUp() override {
ShardingTestFixture::setUp();
configTargeter()->setFindHostReturnValue(configHost);
}
void expectConfigVersionLoad(StatusWith<OID> result) {
onFindCommand([&](const RemoteCommandRequest& request) {
ASSERT_EQUALS(configHost, request.target);
ASSERT_BSONOBJ_EQ(kReplSecondaryOkMetadata,
rpc::TrackingMetadata::removeTrackingData(request.metadata));
const NamespaceString nss(request.dbname, request.cmdObj.firstElement().String());
ASSERT_EQ(nss.ns(), "config.version");
auto query = assertGet(QueryRequest::makeFromFindCommand(nss, request.cmdObj, false));
ASSERT_EQ(query->ns(), "config.version");
ASSERT_BSONOBJ_EQ(query->getFilter(), BSONObj());
ASSERT_FALSE(query->getLimit().is_initialized());
if (result.isOK()) {
VersionType version;
version.setCurrentVersion(CURRENT_CONFIG_VERSION);
version.setMinCompatibleVersion(MIN_COMPATIBLE_CONFIG_VERSION);
version.setClusterId(result.getValue());
return StatusWith<std::vector<BSONObj>>{{version.toBSON()}};
} else {
return StatusWith<std::vector<BSONObj>>{result.getStatus()};
}
});
}
protected:
OID clusterId{OID::gen()};
HostAndPort configHost{"TestHost1"};
};
TEST_F(ClusterIdentityTest, BasicLoadSuccess) {
// The first time you ask for the cluster ID it will have to be loaded from the config servers.
auto future = launchAsync([&] {
auto clusterIdStatus =
ClusterIdentityLoader::get(operationContext())
->loadClusterId(operationContext(), repl::ReadConcernLevel::kMajorityReadConcern);
ASSERT_OK(clusterIdStatus);
ASSERT_EQUALS(clusterId, ClusterIdentityLoader::get(operationContext())->getClusterId());
});
expectConfigVersionLoad(clusterId);
future.timed_get(kFutureTimeout);
// Subsequent requests for the cluster ID should not require any network traffic as we consult
// the cached version.
ASSERT_OK(
ClusterIdentityLoader::get(operationContext())
->loadClusterId(operationContext(), repl::ReadConcernLevel::kMajorityReadConcern));
}
TEST_F(ClusterIdentityTest, MultipleThreadsLoadingSuccess) {
// Check that multiple threads calling getClusterId at once still results in only one network
// operation.
auto future1 = launchAsync([&] {
auto clusterIdStatus =
ClusterIdentityLoader::get(operationContext())
->loadClusterId(operationContext(), repl::ReadConcernLevel::kMajorityReadConcern);
ASSERT_OK(clusterIdStatus);
ASSERT_EQUALS(clusterId, ClusterIdentityLoader::get(operationContext())->getClusterId());
});
auto future2 = launchAsync([&] {
auto clusterIdStatus =
ClusterIdentityLoader::get(operationContext())
->loadClusterId(operationContext(), repl::ReadConcernLevel::kMajorityReadConcern);
ASSERT_OK(clusterIdStatus);
ASSERT_EQUALS(clusterId, ClusterIdentityLoader::get(operationContext())->getClusterId());
});
auto future3 = launchAsync([&] {
auto clusterIdStatus =
ClusterIdentityLoader::get(operationContext())
->loadClusterId(operationContext(), repl::ReadConcernLevel::kMajorityReadConcern);
ASSERT_OK(clusterIdStatus);
ASSERT_EQUALS(clusterId, ClusterIdentityLoader::get(operationContext())->getClusterId());
});
expectConfigVersionLoad(clusterId);
future1.timed_get(kFutureTimeout);
future2.timed_get(kFutureTimeout);
future3.timed_get(kFutureTimeout);
}
TEST_F(ClusterIdentityTest, BasicLoadFailureFollowedBySuccess) {
// The first time you ask for the cluster ID it will have to be loaded from the config servers.
auto future = launchAsync([&] {
auto clusterIdStatus =
ClusterIdentityLoader::get(operationContext())
->loadClusterId(operationContext(), repl::ReadConcernLevel::kMajorityReadConcern);
ASSERT_EQUALS(ErrorCodes::Interrupted, clusterIdStatus);
});
expectConfigVersionLoad(Status(ErrorCodes::Interrupted, "interrupted"));
future.timed_get(kFutureTimeout);
// After a failure to load the cluster ID, subsequent attempts to get the cluster ID should
// retry loading it.
future = launchAsync([&] {
auto clusterIdStatus =
ClusterIdentityLoader::get(operationContext())
->loadClusterId(operationContext(), repl::ReadConcernLevel::kMajorityReadConcern);
ASSERT_OK(clusterIdStatus);
ASSERT_EQUALS(clusterId, ClusterIdentityLoader::get(operationContext())->getClusterId());
});
expectConfigVersionLoad(clusterId);
future.timed_get(kFutureTimeout);
}
} // namespace
} // namespace mongo
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