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/**
* Copyright (C) 2014 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::kReplication
#include "mongo/platform/basic.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/operation_context_noop.h"
#include "mongo/db/repl/repl_set_heartbeat_args.h"
#include "mongo/db/repl/repl_set_heartbeat_response.h"
#include "mongo/db/repl/replica_set_config.h"
#include "mongo/db/repl/replication_coordinator_external_state_mock.h"
#include "mongo/db/repl/replication_coordinator_impl.h"
#include "mongo/db/repl/replication_coordinator_test_fixture.h"
#include "mongo/db/repl/topology_coordinator_impl.h"
#include "mongo/executor/network_interface_mock.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/log.h"
namespace mongo {
namespace repl {
namespace {
using executor::NetworkInterfaceMock;
class ReplCoordHBTest : public ReplCoordTest {
protected:
void assertMemberState(MemberState expected, std::string msg = "");
ReplSetHeartbeatResponse receiveHeartbeatFrom(
const ReplicaSetConfig& rsConfig,
int sourceId,
const HostAndPort& source);
};
void ReplCoordHBTest::assertMemberState(const MemberState expected, std::string msg) {
const MemberState actual = getReplCoord()->getMemberState();
ASSERT(expected == actual) << "Expected coordinator to report state " <<
expected.toString() << " but found " << actual.toString() << " - " << msg;
}
ReplSetHeartbeatResponse ReplCoordHBTest::receiveHeartbeatFrom(
const ReplicaSetConfig& rsConfig,
int sourceId,
const HostAndPort& source) {
ReplSetHeartbeatArgs hbArgs;
hbArgs.setProtocolVersion(1);
hbArgs.setConfigVersion(rsConfig.getConfigVersion());
hbArgs.setSetName(rsConfig.getReplSetName());
hbArgs.setSenderHost(source);
hbArgs.setSenderId(sourceId);
ASSERT(hbArgs.isInitialized());
ReplSetHeartbeatResponse response;
ASSERT_OK(getReplCoord()->processHeartbeat(hbArgs, &response));
return response;
}
TEST_F(ReplCoordHBTest, JoinExistingReplSet) {
logger::globalLogDomain()->setMinimumLoggedSeverity(logger::LogSeverity::Debug(3));
ReplicaSetConfig rsConfig = assertMakeRSConfig(
BSON("_id" << "mySet" <<
"version" << 3 <<
"members" << BSON_ARRAY(BSON("_id" << 1 << "host" << "h1:1") <<
BSON("_id" << 2 << "host" << "h2:1") <<
BSON("_id" << 3 << "host" << "h3:1"))));
init("mySet");
addSelf(HostAndPort("h2", 1));
const Date_t startDate = getNet()->now();
start();
enterNetwork();
assertMemberState(MemberState::RS_STARTUP);
NetworkInterfaceMock* net = getNet();
ASSERT_FALSE(net->hasReadyRequests());
exitNetwork();
receiveHeartbeatFrom(rsConfig, 1, HostAndPort("h1", 1));
enterNetwork();
NetworkInterfaceMock::NetworkOperationIterator noi = net->getNextReadyRequest();
const RemoteCommandRequest& request = noi->getRequest();
ASSERT_EQUALS(HostAndPort("h1", 1), request.target);
ReplSetHeartbeatArgs hbArgs;
ASSERT_OK(hbArgs.initialize(request.cmdObj));
ASSERT_EQUALS("mySet", hbArgs.getSetName());
ASSERT_EQUALS(-2, hbArgs.getConfigVersion());
ReplSetHeartbeatResponse hbResp;
hbResp.setSetName("mySet");
hbResp.setState(MemberState::RS_PRIMARY);
hbResp.noteReplSet();
hbResp.setConfigVersion(rsConfig.getConfigVersion());
hbResp.setConfig(rsConfig);
BSONObjBuilder responseBuilder;
responseBuilder << "ok" << 1;
hbResp.addToBSON(&responseBuilder, false);
net->scheduleResponse(noi,
startDate + Milliseconds(200),
makeResponseStatus(responseBuilder.obj()));
assertRunUntil(startDate + Milliseconds(200));
// Because the new config is stored using an out-of-band thread, we need to perform some
// extra synchronization to let the executor finish the heartbeat reconfig. We know that
// after the out-of-band thread completes, it schedules new heartbeats. We assume that no
// other network operations get scheduled during or before the reconfig, though this may
// cease to be true in the future.
noi = net->getNextReadyRequest();
assertMemberState(MemberState::RS_STARTUP2);
OperationContextNoop txn;
ReplicaSetConfig storedConfig;
ASSERT_OK(storedConfig.initialize(
unittest::assertGet(getExternalState()->loadLocalConfigDocument(&txn))));
ASSERT_OK(storedConfig.validate());
ASSERT_EQUALS(3, storedConfig.getConfigVersion());
ASSERT_EQUALS(3, storedConfig.getNumMembers());
exitNetwork();
}
TEST_F(ReplCoordHBTest, DoNotJoinReplSetIfNotAMember) {
// Tests that a node in RS_STARTUP will not transition to RS_REMOVED if it receives a
// configuration that does not contain it.
logger::globalLogDomain()->setMinimumLoggedSeverity(logger::LogSeverity::Debug(3));
ReplicaSetConfig rsConfig = assertMakeRSConfig(
BSON("_id" << "mySet" <<
"version" << 3 <<
"members" << BSON_ARRAY(BSON("_id" << 1 << "host" << "h1:1") <<
BSON("_id" << 2 << "host" << "h2:1") <<
BSON("_id" << 3 << "host" << "h3:1"))));
init("mySet");
addSelf(HostAndPort("h4", 1));
const Date_t startDate = getNet()->now();
start();
enterNetwork();
assertMemberState(MemberState::RS_STARTUP, "1");
NetworkInterfaceMock* net = getNet();
ASSERT_FALSE(net->hasReadyRequests());
exitNetwork();
receiveHeartbeatFrom(rsConfig, 1, HostAndPort("h1", 1));
enterNetwork();
NetworkInterfaceMock::NetworkOperationIterator noi = net->getNextReadyRequest();
const RemoteCommandRequest& request = noi->getRequest();
ASSERT_EQUALS(HostAndPort("h1", 1), request.target);
ReplSetHeartbeatArgs hbArgs;
ASSERT_OK(hbArgs.initialize(request.cmdObj));
ASSERT_EQUALS("mySet", hbArgs.getSetName());
ASSERT_EQUALS(-2, hbArgs.getConfigVersion());
ReplSetHeartbeatResponse hbResp;
hbResp.setSetName("mySet");
hbResp.setState(MemberState::RS_PRIMARY);
hbResp.noteReplSet();
hbResp.setConfigVersion(rsConfig.getConfigVersion());
hbResp.setConfig(rsConfig);
BSONObjBuilder responseBuilder;
responseBuilder << "ok" << 1;
hbResp.addToBSON(&responseBuilder, false);
net->scheduleResponse(noi,
startDate + Milliseconds(200),
makeResponseStatus(responseBuilder.obj()));
assertRunUntil(startDate + Milliseconds(2200));
// Because the new config is stored using an out-of-band thread, we need to perform some
// extra synchronization to let the executor finish the heartbeat reconfig. We know that
// after the out-of-band thread completes, it schedules new heartbeats. We assume that no
// other network operations get scheduled during or before the reconfig, though this may
// cease to be true in the future.
noi = net->getNextReadyRequest();
assertMemberState(MemberState::RS_STARTUP, "2");
OperationContextNoop txn;
StatusWith<BSONObj> loadedConfig(getExternalState()->loadLocalConfigDocument(&txn));
ASSERT_NOT_OK(loadedConfig.getStatus()) << loadedConfig.getValue();
exitNetwork();
}
TEST_F(ReplCoordHBTest, NotYetInitializedConfigStateEarlyReturn) {
// ensure that if we've yet to receive an initial config, we return NotYetInitialized
init("mySet");
ReplSetHeartbeatArgs hbArgs;
hbArgs.setProtocolVersion(1);
hbArgs.setConfigVersion(3);
hbArgs.setSetName("mySet");
hbArgs.setSenderHost(HostAndPort("h1:1"));
hbArgs.setSenderId(1);
ASSERT(hbArgs.isInitialized());
ReplSetHeartbeatResponse response;
Status status = getReplCoord()->processHeartbeat(hbArgs, &response);
ASSERT_EQUALS(ErrorCodes::NotYetInitialized, status.code());
}
TEST_F(ReplCoordHBTest, OnlyUnauthorizedUpCausesRecovering) {
// Tests that a node that only has auth error heartbeats is recovering
logger::globalLogDomain()->setMinimumLoggedSeverity(logger::LogSeverity::Debug(3));
assertStartSuccess(
BSON("_id" << "mySet" <<
"version" << 1 <<
"members" << BSON_ARRAY(BSON("_id" << 1 << "host" << "node1:12345") <<
BSON("_id" << 2 << "host" << "node2:12345"))),
HostAndPort("node1", 12345));
ASSERT(getReplCoord()->setFollowerMode(MemberState::RS_SECONDARY));
// process heartbeat
enterNetwork();
const NetworkInterfaceMock::NetworkOperationIterator noi = getNet()->getNextReadyRequest();
const RemoteCommandRequest& request = noi->getRequest();
log() << request.target.toString() << " processing " << request.cmdObj;
getNet()->scheduleResponse(noi, getNet()->now(), makeResponseStatus(
BSON("ok" << 0.0 <<
"errmsg" << "unauth'd" <<
"code" << ErrorCodes::Unauthorized)));
if (request.target != HostAndPort("node2", 12345)
&& request.cmdObj.firstElement().fieldNameStringData() != "replSetHeartbeat") {
error() << "Black holing unexpected request to "
<< request.target << ": " << request.cmdObj;
getNet()->blackHole(noi);
}
getNet()->runReadyNetworkOperations();
exitNetwork();
ASSERT_TRUE(getTopoCoord().getMemberState().recovering());
assertMemberState(MemberState::RS_RECOVERING, "0");
}
} // namespace
} // namespace repl
} // namespace mongo
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