Status LegacyReplicationCoordinator::processReplSetInitiate(OperationContext* txn,
const BSONObj& givenConfig,
BSONObjBuilder* resultObj) {
log() << "replSet replSetInitiate admin command received from client" << rsLog;
if (!_settings.usingReplSets()) {
return Status(ErrorCodes::NoReplicationEnabled, "server is not running with --replSet");
}
if( theReplSet ) {
resultObj->append("info",
"try querying " + rsConfigNs + " to see current configuration");
return Status(ErrorCodes::AlreadyInitialized, "already initialized");
}
try {
{
// just make sure we can get a write lock before doing anything else. we'll
// reacquire one later. of course it could be stuck then, but this check lowers the
// risk if weird things are up.
time_t t = time(0);
Lock::GlobalWrite lk(txn->lockState());
if( time(0)-t > 10 ) {
return Status(ErrorCodes::ExceededTimeLimit,
"took a long time to get write lock, so not initiating. "
"Initiate when server less busy?");
}
/* check that we don't already have an oplog. that could cause issues.
it is ok if the initiating member has *other* data than that.
*/
BSONObj o;
if( Helpers::getFirst(txn, rsoplog, o) ) {
return Status(ErrorCodes::AlreadyInitialized,
rsoplog + string(" is not empty on the initiating member. "
"cannot initiate."));
}
}
if( ReplSet::startupStatus == ReplSet::BADCONFIG ) {
resultObj->append("info", ReplSet::startupStatusMsg.get());
return Status(ErrorCodes::InvalidReplicaSetConfig,
"server already in BADCONFIG state (check logs); not initiating");
}
if( ReplSet::startupStatus != ReplSet::EMPTYCONFIG ) {
resultObj->append("startupStatus", ReplSet::startupStatus);
resultObj->append("info", _settings.replSet);
return Status(ErrorCodes::InvalidReplicaSetConfig,
"all members and seeds must be reachable to initiate set");
}
BSONObj configObj;
if (!givenConfig.isEmpty()) {
configObj = givenConfig;
} else {
resultObj->append("info2", "no configuration explicitly specified -- making one");
log() << "replSet info initiate : no configuration specified. "
"Using a default configuration for the set" << rsLog;
string name;
vector<HostAndPort> seeds;
set<HostAndPort> seedSet;
parseReplSetSeedList(_settings.replSet, name, seeds, seedSet); // may throw...
BSONObjBuilder b;
b.append("_id", name);
BSONObjBuilder members;
HostAndPort me = someHostAndPortForMe();
members.append("0", BSON( "_id" << 0 << "host" << me.toString() ));
resultObj->append("me", me.toString());
for( unsigned i = 0; i < seeds.size(); i++ ) {
members.append(BSONObjBuilder::numStr(i+1),
BSON( "_id" << i+1 << "host" << seeds[i].toString()));
}
b.appendArray("members", members.obj());
configObj = b.obj();
log() << "replSet created this configuration for initiation : " <<
configObj.toString() << rsLog;
}
scoped_ptr<ReplSetConfig> newConfig;
try {
newConfig.reset(ReplSetConfig::make(configObj));
} catch (const DBException& e) {
log() << "replSet replSetInitiate exception: " << e.what() << rsLog;
return Status(ErrorCodes::InvalidReplicaSetConfig,
mongoutils::str::stream() << "couldn't parse cfg object " << e.what());
}
if( newConfig->version > 1 ) {
return Status(ErrorCodes::InvalidReplicaSetConfig,
"can't initiate with a version number greater than 1");
}
log() << "replSet replSetInitiate config object parses ok, " <<
newConfig->members.size() << " members specified" << rsLog;
checkMembersUpForConfigChange(*newConfig, *resultObj, true);
log() << "replSet replSetInitiate all members seem up" << rsLog;
createOplog(txn);
Lock::GlobalWrite lk(txn->lockState());
BSONObj comment = BSON( "msg" << "initiating set");
newConfig->saveConfigLocally(txn, comment);
log() << "replSet replSetInitiate config now saved locally. "
"Should come online in about a minute." << rsLog;
resultObj->append("info",
"Config now saved locally. Should come online in about a minute.");
ReplSet::startupStatus = ReplSet::SOON;
ReplSet::startupStatusMsg.set("Received replSetInitiate - "
"should come online shortly.");
}
catch(const DBException& e ) {
return e.toStatus();
}
return Status::OK();
}
virtual bool run(const string& , BSONObj& cmdObj, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
log() << "replSet replSetInitiate admin command received from client" << rsLog;
if( !replSet ) {
errmsg = "server is not running with --replSet";
return false;
}
if( theReplSet ) {
errmsg = "already initialized";
result.append("info", "try querying " + rsConfigNs + " to see current configuration");
return false;
}
{
// just make sure we can get a write lock before doing anything else. we'll reacquire one
// later. of course it could be stuck then, but this check lowers the risk if weird things
// are up.
time_t t = time(0);
writelock lk("");
if( time(0)-t > 10 ) {
errmsg = "took a long time to get write lock, so not initiating. Initiate when server less busy?";
return false;
}
/* check that we don't already have an oplog. that could cause issues.
it is ok if the initiating member has *other* data than that.
*/
BSONObj o;
if( Helpers::getFirst(rsoplog, o) ) {
errmsg = rsoplog + string(" is not empty on the initiating member. cannot initiate.");
return false;
}
}
if( ReplSet::startupStatus == ReplSet::BADCONFIG ) {
errmsg = "server already in BADCONFIG state (check logs); not initiating";
result.append("info", ReplSet::startupStatusMsg.get());
return false;
}
if( ReplSet::startupStatus != ReplSet::EMPTYCONFIG ) {
result.append("startupStatus", ReplSet::startupStatus);
errmsg = "all members and seeds must be reachable to initiate set";
result.append("info", cmdLine._replSet);
return false;
}
BSONObj configObj;
if( cmdObj["replSetInitiate"].type() != Object ) {
result.append("info2", "no configuration explicitly specified -- making one");
log() << "replSet info initiate : no configuration specified. Using a default configuration for the set" << rsLog;
string name;
vector<HostAndPort> seeds;
set<HostAndPort> seedSet;
parseReplsetCmdLine(cmdLine._replSet, name, seeds, seedSet); // may throw...
bob b;
b.append("_id", name);
bob members;
members.append("0", BSON( "_id" << 0 << "host" << HostAndPort::Me().toString() ));
for( unsigned i = 0; i < seeds.size(); i++ )
members.append(bob::numStr(i+1), BSON( "_id" << i+1 << "host" << seeds[i].toString()));
b.appendArray("members", members.obj());
configObj = b.obj();
log() << "replSet created this configuration for initiation : " << configObj.toString() << rsLog;
}
else {
configObj = cmdObj["replSetInitiate"].Obj();
}
bool parsed = false;
try {
ReplSetConfig newConfig(configObj);
parsed = true;
if( newConfig.version > 1 ) {
errmsg = "can't initiate with a version number greater than 1";
return false;
}
log() << "replSet replSetInitiate config object parses ok, " << newConfig.members.size() << " members specified" << rsLog;
checkMembersUpForConfigChange(newConfig, true);
log() << "replSet replSetInitiate all members seem up" << rsLog;
createOplog();
writelock lk("");
bo comment = BSON( "msg" << "initiating set");
newConfig.saveConfigLocally(comment);
log() << "replSet replSetInitiate config now saved locally. Should come online in about a minute." << rsLog;
result.append("info", "Config now saved locally. Should come online in about a minute.");
ReplSet::startupStatus = ReplSet::SOON;
ReplSet::startupStatusMsg.set("Received replSetInitiate - should come online shortly.");
}
catch( DBException& e ) {
log() << "replSet replSetInitiate exception: " << e.what() << rsLog;
if( !parsed )
errmsg = string("couldn't parse cfg object ") + e.what();
else
errmsg = string("couldn't initiate : ") + e.what();
return false;
}
return true;
}
Status LegacyReplicationCoordinator::processReplSetReconfig(OperationContext* txn,
const ReplSetReconfigArgs& args,
BSONObjBuilder* resultObj) {
if( args.force && !theReplSet ) {
_settings.reconfig = args.newConfigObj.getOwned();
resultObj->append("msg",
"will try this config momentarily, try running rs.conf() again in a "
"few seconds");
return Status::OK();
}
// TODO(dannenberg) once reconfig processing has been figured out in the impl, this should
// be moved out of processReplSetReconfig and into the command body like all other cmds
Status status = checkReplEnabledForCommand(resultObj);
if (!status.isOK()) {
return status;
}
if( !args.force && !theReplSet->box.getState().primary() ) {
return Status(ErrorCodes::NotMaster,
"replSetReconfig command must be sent to the current replica set "
"primary.");
}
try {
{
// just make sure we can get a write lock before doing anything else. we'll
// reacquire one later. of course it could be stuck then, but this check lowers the
// risk if weird things are up - we probably don't want a change to apply 30 minutes
// after the initial attempt.
time_t t = time(0);
Lock::GlobalWrite lk(txn->lockState());
if( time(0)-t > 20 ) {
return Status(ErrorCodes::ExceededTimeLimit,
"took a long time to get write lock, so not initiating. "
"Initiate when server less busy?");
}
}
scoped_ptr<ReplSetConfig> newConfig(ReplSetConfig::make(args.newConfigObj, args.force));
log() << "replSet replSetReconfig config object parses ok, " <<
newConfig->members.size() << " members specified" << rsLog;
Status status = ReplSetConfig::legalChange(theReplSet->getConfig(), *newConfig);
if (!status.isOK()) {
return status;
}
checkMembersUpForConfigChange(*newConfig, *resultObj, false);
log() << "replSet replSetReconfig [2]" << rsLog;
theReplSet->haveNewConfig(txn, *newConfig, true);
ReplSet::startupStatusMsg.set("replSetReconfig'd");
}
catch(const DBException& e) {
log() << "replSet replSetReconfig exception: " << e.what() << rsLog;
return e.toStatus();
}
resetSlaveCache();
return Status::OK();
}