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/**
* Copyright (C) 2008-2014 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.
*/
#include "mongo/platform/basic.h"
#include <list>
#include <vector>
#include "mongo/client/connpool.h"
#include "mongo/db/commands/server_status.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/dbhelpers.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/lasterror.h"
#include "mongo/db/operation_context_impl.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/db/repl/is_master_response.h"
#include "mongo/db/repl/master_slave.h"
#include "mongo/db/repl/oplog.h"
#include "mongo/db/repl/oplogreader.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/db/storage_options.h"
#include "mongo/db/wire_version.h"
#include "mongo/s/write_ops/batched_command_request.h"
namespace mongo {
using std::unique_ptr;
using std::list;
using std::string;
using std::stringstream;
namespace repl {
void appendReplicationInfo(OperationContext* txn, BSONObjBuilder& result, int level) {
ReplicationCoordinator* replCoord = getGlobalReplicationCoordinator();
if (replCoord->getSettings().usingReplSets()) {
IsMasterResponse isMasterResponse;
replCoord->fillIsMasterForReplSet(&isMasterResponse);
result.appendElements(isMasterResponse.toBSON());
if (level) {
replCoord->appendSlaveInfoData(&result);
}
return;
}
// TODO(dannenberg) replAllDead is bad and should be removed when master slave is removed
if (replAllDead) {
result.append("ismaster", 0);
string s = string("dead: ") + replAllDead;
result.append("info", s);
} else {
result.appendBool("ismaster",
getGlobalReplicationCoordinator()->isMasterForReportingPurposes());
}
if (level) {
BSONObjBuilder sources(result.subarrayStart("sources"));
int n = 0;
list<BSONObj> src;
{
const char* localSources = "local.sources";
AutoGetCollectionForRead ctx(txn, localSources);
unique_ptr<PlanExecutor> exec(
InternalPlanner::collectionScan(txn, localSources, ctx.getCollection()));
BSONObj obj;
PlanExecutor::ExecState state;
while (PlanExecutor::ADVANCED == (state = exec->getNext(&obj, NULL))) {
src.push_back(obj);
}
}
for (list<BSONObj>::const_iterator i = src.begin(); i != src.end(); i++) {
BSONObj s = *i;
BSONObjBuilder bb;
bb.append(s["host"]);
string sourcename = s["source"].valuestr();
if (sourcename != "main")
bb.append(s["source"]);
{
BSONElement e = s["syncedTo"];
BSONObjBuilder t(bb.subobjStart("syncedTo"));
t.appendDate("time", e.timestampTime());
t.append("inc", e.timestampInc());
t.done();
}
if (level > 1) {
wassert(!txn->lockState()->isLocked());
// note: there is no so-style timeout on this connection; perhaps we should have one.
ScopedDbConnection conn(s["host"].valuestr());
DBClientConnection* cliConn = dynamic_cast<DBClientConnection*>(&conn.conn());
if (cliConn && replAuthenticate(cliConn)) {
BSONObj first = conn->findOne((string) "local.oplog.$" + sourcename,
Query().sort(BSON("$natural" << 1)));
BSONObj last = conn->findOne((string) "local.oplog.$" + sourcename,
Query().sort(BSON("$natural" << -1)));
bb.appendDate("masterFirst", first["ts"].timestampTime());
bb.appendDate("masterLast", last["ts"].timestampTime());
const auto lag = (last["ts"].timestampTime() - s["syncedTo"].timestampTime());
bb.append("lagSeconds", durationCount<Milliseconds>(lag) / 1000.0);
}
conn.done();
}
sources.append(BSONObjBuilder::numStr(n++), bb.obj());
}
sources.done();
replCoord->appendSlaveInfoData(&result);
}
}
class ReplicationInfoServerStatus : public ServerStatusSection {
public:
ReplicationInfoServerStatus() : ServerStatusSection("repl") {}
bool includeByDefault() const {
return true;
}
BSONObj generateSection(OperationContext* txn, const BSONElement& configElement) const {
if (!getGlobalReplicationCoordinator()->isReplEnabled()) {
return BSONObj();
}
int level = configElement.numberInt();
BSONObjBuilder result;
appendReplicationInfo(txn, result, level);
getGlobalReplicationCoordinator()->processReplSetGetRBID(&result);
return result.obj();
}
} replicationInfoServerStatus;
class OplogInfoServerStatus : public ServerStatusSection {
public:
OplogInfoServerStatus() : ServerStatusSection("oplog") {}
bool includeByDefault() const {
return false;
}
BSONObj generateSection(OperationContext* txn, const BSONElement& configElement) const {
ReplicationCoordinator* replCoord = getGlobalReplicationCoordinator();
if (!replCoord->isReplEnabled()) {
return BSONObj();
}
BSONObjBuilder result;
// TODO(siyuan) Output term of OpTime
result.append("latestOptime", replCoord->getMyLastOptime().getTimestamp());
const std::string& oplogNS =
replCoord->getReplicationMode() == ReplicationCoordinator::modeReplSet
? rsOplogName
: masterSlaveOplogName;
BSONObj o;
uassert(17347,
"Problem reading earliest entry from oplog",
Helpers::getSingleton(txn, oplogNS.c_str(), o));
result.append("earliestOptime", o["ts"].timestamp());
return result.obj();
}
} oplogInfoServerStatus;
class CmdIsMaster : public Command {
public:
virtual bool requiresAuth() {
return false;
}
virtual bool slaveOk() const {
return true;
}
virtual void help(stringstream& help) const {
help << "Check if this server is primary for a replica pair/set; also if it is --master or "
"--slave in simple master/slave setups.\n";
help << "{ isMaster : 1 }";
}
virtual bool isWriteCommandForConfigServer() const {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {} // No auth required
CmdIsMaster() : Command("isMaster", true, "ismaster") {}
virtual bool run(OperationContext* txn,
const string&,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
/* currently request to arbiter is (somewhat arbitrarily) an ismaster request that is not
authenticated.
*/
if (cmdObj["forShell"].trueValue())
LastError::get(txn->getClient()).disable();
appendReplicationInfo(txn, result, 0);
result.appendNumber("maxBsonObjectSize", BSONObjMaxUserSize);
result.appendNumber("maxMessageSizeBytes", MaxMessageSizeBytes);
result.appendNumber("maxWriteBatchSize", BatchedCommandRequest::kMaxWriteBatchSize);
result.appendDate("localTime", jsTime());
result.append("maxWireVersion", maxWireVersion);
result.append("minWireVersion", minWireVersion);
return true;
}
} cmdismaster;
OpCounterServerStatusSection replOpCounterServerStatusSection("opcountersRepl", &replOpCounters);
} // namespace repl
} // namespace mongo
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