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/**
* Copyright (C) 2008 10gen 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/>.
*/
#include "mongo/db/repl/replication_server_status.h"
#include <list>
#include <vector>
#include <boost/scoped_ptr.hpp>
#include "mongo/client/connpool.h"
#include "mongo/db/commands/server_status.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/db/repl/is_master.h"
#include "mongo/db/repl/master_slave.h"
#include "mongo/db/repl/rs.h"
#include "mongo/db/wire_version.h"
namespace mongo {
// our config from command line etc.
ReplSettings replSettings;
bool anyReplEnabled() {
return replSettings.slave || replSettings.master || theReplSet;
}
bool replAuthenticate(DBClientBase *conn, bool skipAuthCheck);
void appendReplicationInfo(BSONObjBuilder& result, int level) {
if ( replSet ) {
if( theReplSet == 0 || theReplSet->state().shunned() ) {
result.append("ismaster", false);
result.append("secondary", false);
result.append("info", ReplSet::startupStatusMsg.get());
result.append( "isreplicaset" , true );
}
else {
theReplSet->fillIsMaster(result);
}
return;
}
if ( replAllDead ) {
result.append("ismaster", 0);
string s = string("dead: ") + replAllDead;
result.append("info", s);
}
else {
result.appendBool("ismaster", _isMaster() );
}
if ( level && replSet ) {
result.append( "info" , "is replica set" );
}
else if ( level ) {
BSONObjBuilder sources( result.subarrayStart( "sources" ) );
int n = 0;
list<BSONObj> src;
{
Client::ReadContext ctx("local.sources", dbpath);
auto_ptr<Runner> runner(InternalPlanner::collectionScan("local.sources"));
BSONObj obj;
Runner::RunnerState state;
while (Runner::RUNNER_ADVANCED == (state = runner->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( !Lock::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, false) ) {
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() );
double lag = (double) (last["ts"].timestampTime() - s["syncedTo"].timestampTime());
bb.append( "lagSeconds" , lag / 1000 );
}
conn.done();
}
sources.append( BSONObjBuilder::numStr( n++ ) , bb.obj() );
}
sources.done();
}
}
class ReplicationInfoServerStatus : public ServerStatusSection {
public:
ReplicationInfoServerStatus() : ServerStatusSection( "repl" ){}
bool includeByDefault() const { return true; }
BSONObj generateSection(const BSONElement& configElement) const {
if ( ! anyReplEnabled() )
return BSONObj();
int level = configElement.numberInt();
BSONObjBuilder result;
appendReplicationInfo(result, level);
return result.obj();
}
} replicationInfoServerStatus;
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 LockType locktype() const { return NONE; }
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(const string& , BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool /*fromRepl*/) {
/* currently request to arbiter is (somewhat arbitrarily) an ismaster request that is not
authenticated.
*/
if ( cmdObj["forShell"].trueValue() )
lastError.disableForCommand();
appendReplicationInfo(result, 0);
result.appendNumber("maxBsonObjectSize", BSONObjMaxUserSize);
result.appendNumber("maxMessageSizeBytes", MaxMessageSizeBytes);
result.appendDate("localTime", jsTime());
result.append("maxWireVersion", maxWireVersion);
result.append("minWireVersion", minWireVersion);
return true;
}
} cmdismaster;
OpCounterServerStatusSection replOpCounterServerStatusSection( "opcountersRepl", &replOpCounters );
}
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