void CatalogManagerReplicaSet::logChange(const string& clientAddress,
const string& what,
const string& ns,
const BSONObj& detail) {
if (_changeLogCollectionCreated.load() == 0) {
BSONObj createCmd = BSON("create" << ChangelogType::ConfigNS << "capped" << true << "size"
<< kChangeLogCollectionSize);
auto result = _runConfigServerCommandWithNotMasterRetries("config", createCmd);
if (!result.isOK()) {
LOG(1) << "couldn't create changelog collection: " << causedBy(result.getStatus());
return;
}
Status commandStatus = Command::getStatusFromCommandResult(result.getValue());
if (commandStatus.isOK() || commandStatus == ErrorCodes::NamespaceExists) {
_changeLogCollectionCreated.store(1);
} else {
LOG(1) << "couldn't create changelog collection: " << causedBy(commandStatus);
return;
}
}
Date_t now = grid.shardRegistry()->getExecutor()->now();
std::string hostName = grid.shardRegistry()->getNetwork()->getHostName();
const string changeID = str::stream() << hostName << "-" << now.toString() << "-" << OID::gen();
ChangelogType changeLog;
changeLog.setChangeID(changeID);
changeLog.setServer(hostName);
changeLog.setClientAddr(clientAddress);
changeLog.setTime(now);
changeLog.setNS(ns);
changeLog.setWhat(what);
changeLog.setDetails(detail);
BSONObj changeLogBSON = changeLog.toBSON();
log() << "about to log metadata event: " << changeLogBSON;
Status result = insert(ChangelogType::ConfigNS, changeLogBSON, NULL);
if (!result.isOK()) {
warning() << "Error encountered while logging config change with ID " << changeID << ": "
<< result;
}
}
Status logConfigChange(const ConnectionString& configLoc,
const string& clientHost,
const string& ns,
const string& description,
const BSONObj& details)
{
//
// The code for writing to the changelog collection exists elsewhere - we duplicate here to
// avoid dependency issues.
// TODO: Merge again once config.cpp is cleaned up.
//
string changeID = stream() << getHostNameCached() << "-" << terseCurrentTime() << "-"
<< OID::gen();
ChangelogType changelog;
changelog.setChangeID(changeID);
changelog.setServer(getHostNameCached());
changelog.setClientAddr(clientHost == "" ? "N/A" : clientHost);
changelog.setTime(jsTime());
changelog.setWhat(description);
changelog.setNS(ns);
changelog.setDetails(details);
log() << "about to log new metadata event: " << changelog.toBSON() << endl;
scoped_ptr<ScopedDbConnection> connPtr;
try {
connPtr.reset(new ScopedDbConnection(configLoc, 30));
ScopedDbConnection& conn = *connPtr;
// TODO: better way here
static bool createdCapped = false;
if (!createdCapped) {
try {
conn->createCollection(ChangelogType::ConfigNS, 1024 * 1024 * 10, true);
}
catch (const DBException& e) {
// don't care, someone else may have done this for us
// if there's still a problem, caught in outer try
LOG(1) << "couldn't create the changelog, continuing " << e << endl;
}
createdCapped = true;
}
connPtr->done();
}
catch (const DBException& e) {
// if we got here, it means the config change is only in the log,
// it didn't make it to config.changelog
log() << "not logging config change: " << changeID << causedBy(e) << endl;
return e.toStatus();
}
Status result = clusterInsert( ChangelogType::ConfigNS,
changelog.toBSON(),
WriteConcernOptions::AllConfigs,
NULL );
if ( !result.isOK() ) {
return Status( result.code(), str::stream() << "failed to write to changelog: "
<< result.reason() );
}
return result;
}
