void rotate() {
if ( ! _enabled ) {
cout << "LoggingManager not enabled" << endl;
return;
}
if ( _file ) {
#ifdef _WIN32
cout << "log rotation net yet supported on windows" << endl;
return;
#else
struct tm t;
localtime_r( &_opened , &t );
stringstream ss;
ss << _path << "." << terseCurrentTime(false);
string s = ss.str();
rename( _path.c_str() , s.c_str() );
#endif
}
FILE* tmp = freopen(_path.c_str(), (_append ? "a" : "w"), stdout);
if (!tmp) {
cerr << "can't open: " << _path.c_str() << " for log file" << endl;
dbexit( EXIT_BADOPTIONS );
assert(0);
}
Logstream::setLogFile(tmp); // after this point no thread will be using old file
_file = tmp;
_opened = time(0);
}
void ConfigServer::logChange( const string& what , const string& ns , const BSONObj& detail ){
assert( _primary.ok() );
static bool createdCapped = false;
static AtomicUInt num;
ScopedDbConnection conn( _primary );
if ( ! createdCapped ){
try {
conn->createCollection( "config.changelog" , 1024 * 1024 * 10 , true );
}
catch ( UserException& e ){
log(1) << "couldn't create changelog (like race condition): " << e << endl;
// don't care
}
createdCapped = true;
}
stringstream id;
id << getHostNameCached() << "-" << terseCurrentTime() << "-" << num++;
BSONObj msg = BSON( "_id" << id.str() << "server" << getHostNameCached() << "time" << DATENOW <<
"what" << what << "ns" << ns << "details" << detail );
log() << "config change: " << msg << endl;
try {
conn->insert( "config.changelog" , msg );
}
catch ( std::exception& e ){
log() << "not logging config change: " << e.what() << endl;
}
conn.done();
}
void start( const string& lp , bool append ) {
uassert( 10268 , "LoggingManager already started" , ! _enabled );
_append = append;
bool exists = boost::filesystem::exists(lp);
bool isdir = boost::filesystem::is_directory(lp);
bool isreg = boost::filesystem::is_regular(lp);
if ( exists ) {
if ( isdir ) {
cout << "logpath [" << lp << "] should be a filename, not a directory" << endl;
dbexit( EXIT_BADOPTIONS );
assert( 0 );
}
if ( ! append ) {
// only attempt rename if log is regular file
if ( isreg ) {
stringstream ss;
ss << lp << "." << terseCurrentTime( false );
string s = ss.str();
if ( ! rename( lp.c_str() , s.c_str() ) ) {
cout << "log file [" << lp << "] exists; copied to temporary file [" << s << "]" << endl;
} else {
cout << "log file [" << lp << "] exists and couldn't make backup; run with --logappend or manually remove file (" << strerror(errno) << ")" << endl;
dbexit( EXIT_BADOPTIONS );
assert( 0 );
}
}
}
}
// test path
FILE * test = fopen( lp.c_str() , _append ? "a" : "w" );
if ( ! test ) {
cout << "can't open [" << lp << "] for log file: " << errnoWithDescription() << endl;
dbexit( EXIT_BADOPTIONS );
assert( 0 );
}
if (append && exists){
// two blank lines before and after
const string msg = "\n\n***** SERVER RESTARTED *****\n\n\n";
massert(14036, errnoWithPrefix("couldn't write to log file"),
fwrite(msg.data(), 1, msg.size(), test) == msg.size());
}
fclose( test );
_path = lp;
_enabled = 1;
rotate();
}
void printDiff( BSONObj prev , BSONObj now ) {
if ( ! prev["totals"].isABSONObj() ||
! now["totals"].isABSONObj() ) {
cout << "." << endl;
return;
}
prev = prev["totals"].Obj();
now = now["totals"].Obj();
vector<NSInfo> data;
unsigned longest = 30;
BSONObjIterator i( now );
while ( i.more() ) {
BSONElement e = i.next();
// invalid, data fixed in 1.8.0
if ( e.fieldName()[0] == '?' )
continue;
if ( ! str::contains( e.fieldName() , '.' ) )
continue;
BSONElement old = prev[e.fieldName()];
if ( old.eoo() )
continue;
if ( strlen( e.fieldName() ) > longest )
longest = strlen(e.fieldName());
data.push_back( NSInfo( e.fieldName() , old.Obj() , e.Obj() ) );
}
std::sort( data.begin() , data.end() );
cout << "\n"
<< setw(longest) << "ns"
<< "\ttotal"
<< "\tread"
<< "\twrite"
<< "\t\t" << terseCurrentTime()
<< endl;
for ( int i=data.size()-1; i>=0 && data.size() - i < 10 ; i-- ) {
cout << setw(longest) << data[i].ns
<< "\t" << setprecision(3) << data[i].diffTimeMS( "total" ) << "ms"
<< "\t" << setprecision(3) << data[i].diffTimeMS( "readLock" ) << "ms"
<< "\t" << setprecision(3) << data[i].diffTimeMS( "writeLock" ) << "ms"
<< endl;
}
}
void rotate() {
if ( ! _enabled ) {
cout << "LoggingManager not enabled" << endl;
return;
}
if ( _file ) {
#ifdef _WIN32
cout << "log rotation net yet supported on windows" << endl;
return;
#else
struct tm t;
localtime_r( &_opened , &t );
stringstream ss;
ss << _path << "." << terseCurrentTime(false);
string s = ss.str();
rename( _path.c_str() , s.c_str() );
#endif
}
FILE* tmp = freopen(_path.c_str(), (_append ? "a" : "w"), stdout);
if (!tmp) {
cerr << "can't open: " << _path.c_str() << " for log file" << endl;
dbexit( EXIT_BADOPTIONS );
assert(0);
}
#ifdef _WIN32 // windows has these functions it just gives them a funny name
# define dup2 _dup2
# define fileno _fileno
#endif
// redirect stderr to log file
dup2(fileno(tmp), 2);
Logstream::setLogFile(tmp); // after this point no thread will be using old file
#if 0 // enable to test redirection
cout << "written to cout" << endl;
cerr << "written to cerr" << endl;
log() << "written to log()" << endl;
#endif
_file = tmp;
_opened = time(0);
}
RemoveSaver::RemoveSaver( const string& a , const string& b , const string& why) : _out(0) {
static int NUM = 0;
_root = dbpath;
if ( a.size() )
_root /= a;
if ( b.size() )
_root /= b;
verify( a.size() || b.size() );
_file = _root;
stringstream ss;
ss << why << "." << terseCurrentTime(false) << "." << NUM++ << ".bson";
_file /= ss.str();
}
/* must never throw */
void ConfigServer::logChange( const string& what , const string& ns , const BSONObj& detail ) {
string changeID;
try {
// get this entry's ID so we can use on the exception code path too
stringstream id;
static AtomicUInt num;
id << getHostNameCached() << "-" << terseCurrentTime() << "-" << num++;
changeID = id.str();
// send a copy of the message to the log in case it doesn't manage to reach config.changelog
Client* c = currentClient.get();
BSONObj msg = BSON( "_id" << changeID << "server" << getHostNameCached() << "clientAddr" << (c ? c->clientAddress(true) : "N/A")
<< "time" << DATENOW << "what" << what << "ns" << ns << "details" << detail );
log() << "about to log metadata event: " << msg << endl;
assert( _primary.ok() );
ScopedDbConnection conn( _primary );
static bool createdCapped = false;
if ( ! createdCapped ) {
try {
conn->createCollection( "config.changelog" , 1024 * 1024 * 10 , true );
}
catch ( UserException& e ) {
log(1) << "couldn't create changelog (like race condition): " << e << endl;
// don't care
}
createdCapped = true;
}
conn->insert( "config.changelog" , msg );
conn.done();
}
catch ( std::exception& 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 << " " << e.what() << endl;
}
}
void printDiff( const NamespaceStats& prev , const NamespaceStats& now ) {
if ( prev.size() == 0 || now.size() == 0 ) {
cout << "." << endl;
return;
}
vector<NamespaceDiff> data = StatUtil::computeDiff( prev , now );
unsigned longest = 30;
for ( unsigned i=0; i < data.size(); i++ ) {
const string& ns = data[i].ns;
if ( ! useLocks() && ns.find( '.' ) == string::npos )
continue;
if ( ns.size() > longest )
longest = ns.size();
}
int numberWidth = 10;
cout << "\n"
<< setw(longest) << ( useLocks() ? "db" : "ns" )
<< setw(numberWidth+2) << "total"
<< setw(numberWidth+2) << "read"
<< setw(numberWidth+2) << "write"
<< "\t\t" << terseCurrentTime()
<< endl;
for ( int i=data.size()-1; i>=0 && data.size() - i < 10 ; i-- ) {
if ( ! useLocks() && data[i].ns.find( '.' ) == string::npos )
continue;
cout << setw(longest) << data[i].ns
<< setw(numberWidth) << setprecision(3) << data[i].total() << "ms"
<< setw(numberWidth) << setprecision(3) << data[i].read << "ms"
<< setw(numberWidth) << setprecision(3) << data[i].write << "ms"
<< endl;
}
}
void ConfigServer::logChange( const string& what , const string& ns , const BSONObj& detail ){
static bool createdCapped = false;
static AtomicUInt num;
ScopedDbConnection conn( _primary );
if ( ! createdCapped ){
conn->createCollection( "config.changelog" , 1024 * 1024 * 10 , true );
createdCapped = true;
}
stringstream id;
id << ourHostname << "-" << terseCurrentTime() << "-" << num++;
conn->insert( "config.changelog" , BSON( "_id" << id.str() <<
"server" << ourHostname <<
"time" << DATENOW <<
"what" << what <<
"ns" << ns <<
"details" << detail ) );
conn.done();
}
bool rotate() {
if ( ! _enabled ) {
cout << "LoggingManager not enabled" << endl;
return true;
}
if ( _file ) {
#ifdef POSIX_FADV_DONTNEED
posix_fadvise(fileno(_file), 0, 0, POSIX_FADV_DONTNEED);
#endif
// Rename the (open) existing log file to a timestamped name
stringstream ss;
ss << _path << "." << terseCurrentTime( false );
string s = ss.str();
if (0 != rename(_path.c_str(), s.c_str())) {
error() << "Failed to rename " << _path << " to " << s;
return false;
}
}
FILE* tmp = 0; // The new file using the original logpath name
#if _WIN32
// We rename an open log file (above, on next rotation) and the trick to getting Windows to do that is
// to open the file with FILE_SHARE_DELETE. So, we can't use the freopen() call that non-Windows
// versions use because it would open the file without the FILE_SHARE_DELETE flag we need.
//
HANDLE newFileHandle = CreateFileA(
_path.c_str(),
GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL,
OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if ( INVALID_HANDLE_VALUE != newFileHandle ) {
int newFileDescriptor = _open_osfhandle( reinterpret_cast<intptr_t>(newFileHandle), _O_APPEND );
tmp = _fdopen( newFileDescriptor, _append ? "a" : "w" );
}
#else
tmp = freopen(_path.c_str(), _append ? "a" : "w", stdout);
#endif
if ( !tmp ) {
cerr << "can't open: " << _path.c_str() << " for log file" << endl;
return false;
}
// redirect stdout and stderr to log file
dup2( fileno( tmp ), 1 ); // stdout
dup2( fileno( tmp ), 2 ); // stderr
Logstream::setLogFile(tmp); // after this point no thread will be using old file
#if _WIN32
if ( _file )
fclose( _file ); // In Windows, we still have the old file open, close it now
#endif
#if 0 // enable to test redirection
cout << "written to cout" << endl;
cerr << "written to cerr" << endl;
log() << "written to log()" << endl;
#endif
_file = tmp; // Save new file for next rotation
return true;
}
int ConfigServer::checkConfigVersion( bool upgrade ) {
int cur = dbConfigVersion();
if ( cur == VERSION )
return 0;
if ( cur == 0 ) {
scoped_ptr<ScopedDbConnection> conn(
ScopedDbConnection::getScopedDbConnection( _primary.getConnString() ) );
// If the cluster has not previously been initialized, we need to set the version before using so
// subsequent mongoses use the config data the same way. This requires all three config servers online
// initially.
try {
conn->get()->insert( "config.version" , BSON( "_id" << 1 << "version" << VERSION ) );
}
catch( DBException& ) {
error() << "All config servers must initially be reachable for the cluster to be initialized." << endl;
throw;
}
pool.flush();
verify( VERSION == dbConfigVersion( conn->conn() ) );
conn->done();
return 0;
}
if ( cur == 2 ) {
// need to upgrade
verify( VERSION == 3 );
if ( ! upgrade ) {
log() << "newer version of mongo meta data\n"
<< "need to --upgrade after shutting all mongos down"
<< endl;
return -9;
}
scoped_ptr<ScopedDbConnection> connPtr(
ScopedDbConnection::getInternalScopedDbConnection( _primary.getConnString() ) );
ScopedDbConnection& conn = *connPtr;
// do a backup
string backupName;
{
stringstream ss;
ss << "config-backup-" << terseCurrentTime(false);
backupName = ss.str();
}
log() << "backing up config to: " << backupName << endl;
conn->copyDatabase( "config" , backupName );
map<string,string> hostToShard;
set<string> shards;
// shards
{
unsigned n = 0;
auto_ptr<DBClientCursor> c = conn->query( ShardNS::shard , BSONObj() );
while ( c->more() ) {
BSONObj o = c->next();
string host = o["host"].String();
string name = "";
BSONElement id = o["_id"];
if ( id.type() == String ) {
name = id.String();
}
else {
stringstream ss;
ss << "shard" << hostToShard.size();
name = ss.str();
}
hostToShard[host] = name;
shards.insert( name );
n++;
}
verify( n == hostToShard.size() );
verify( n == shards.size() );
conn->remove( ShardNS::shard , BSONObj() );
for ( map<string,string>::iterator i=hostToShard.begin(); i != hostToShard.end(); i++ ) {
conn->insert( ShardNS::shard , BSON( "_id" << i->second << "host" << i->first ) );
}
}
// databases
{
auto_ptr<DBClientCursor> c = conn->query( ShardNS::database , BSONObj() );
map<string,BSONObj> newDBs;
unsigned n = 0;
while ( c->more() ) {
BSONObj old = c->next();
n++;
if ( old["name"].eoo() ) {
// already done
newDBs[old["_id"].String()] = old;
continue;
}
BSONObjBuilder b(old.objsize());
b.appendAs( old["name"] , "_id" );
BSONObjIterator i(old);
while ( i.more() ) {
BSONElement e = i.next();
if ( strcmp( "_id" , e.fieldName() ) == 0 ||
strcmp( "name" , e.fieldName() ) == 0 ) {
continue;
}
b.append( e );
}
BSONObj x = b.obj();
log() << old << "\n\t" << x << endl;
newDBs[old["name"].String()] = x;
}
verify( n == newDBs.size() );
conn->remove( ShardNS::database , BSONObj() );
for ( map<string,BSONObj>::iterator i=newDBs.begin(); i!=newDBs.end(); i++ ) {
conn->insert( ShardNS::database , i->second );
}
}
// chunks
{
unsigned num = 0;
map<string,BSONObj> chunks;
auto_ptr<DBClientCursor> c = conn->query( ShardNS::chunk , BSONObj() );
while ( c->more() ) {
BSONObj x = c->next();
BSONObjBuilder b;
string id = Chunk::genID( x["ns"].String() , x["min"].Obj() );
b.append( "_id" , id );
BSONObjIterator i(x);
while ( i.more() ) {
BSONElement e = i.next();
if ( strcmp( e.fieldName() , "_id" ) == 0 )
continue;
b.append( e );
}
BSONObj n = b.obj();
log() << x << "\n\t" << n << endl;
chunks[id] = n;
num++;
}
verify( num == chunks.size() );
conn->remove( ShardNS::chunk , BSONObj() );
for ( map<string,BSONObj>::iterator i=chunks.begin(); i!=chunks.end(); i++ ) {
conn->insert( ShardNS::chunk , i->second );
}
}
conn->update( "config.version" , BSONObj() , BSON( "_id" << 1 << "version" << VERSION ) );
conn.done();
pool.flush();
return 1;
}
log() << "don't know how to upgrade " << cur << " to " << VERSION << endl;
return -8;
}
int ConfigServer::checkConfigVersion( bool upgrade ) {
int cur = dbConfigVersion();
if ( cur == VERSION )
return 0;
if ( cur == 0 ) {
ScopedDbConnection conn( _primary );
conn->insert( "config.version" , BSON( "_id" << 1 << "version" << VERSION ) );
pool.flush();
assert( VERSION == dbConfigVersion( conn.conn() ) );
conn.done();
return 0;
}
if ( cur == 2 ) {
// need to upgrade
assert( VERSION == 3 );
if ( ! upgrade ) {
log() << "newer version of mongo meta data\n"
<< "need to --upgrade after shutting all mongos down"
<< endl;
return -9;
}
ScopedDbConnection conn( _primary );
// do a backup
string backupName;
{
stringstream ss;
ss << "config-backup-" << terseCurrentTime(false);
backupName = ss.str();
}
log() << "backing up config to: " << backupName << endl;
conn->copyDatabase( "config" , backupName );
map<string,string> hostToShard;
set<string> shards;
// shards
{
unsigned n = 0;
auto_ptr<DBClientCursor> c = conn->query( ShardNS::shard , BSONObj() );
while ( c->more() ) {
BSONObj o = c->next();
string host = o["host"].String();
string name = "";
BSONElement id = o["_id"];
if ( id.type() == String ) {
name = id.String();
}
else {
stringstream ss;
ss << "shard" << hostToShard.size();
name = ss.str();
}
hostToShard[host] = name;
shards.insert( name );
n++;
}
assert( n == hostToShard.size() );
assert( n == shards.size() );
conn->remove( ShardNS::shard , BSONObj() );
for ( map<string,string>::iterator i=hostToShard.begin(); i != hostToShard.end(); i++ ) {
conn->insert( ShardNS::shard , BSON( "_id" << i->second << "host" << i->first ) );
}
}
// databases
{
auto_ptr<DBClientCursor> c = conn->query( ShardNS::database , BSONObj() );
map<string,BSONObj> newDBs;
unsigned n = 0;
while ( c->more() ) {
BSONObj old = c->next();
n++;
if ( old["name"].eoo() ) {
// already done
newDBs[old["_id"].String()] = old;
continue;
}
BSONObjBuilder b(old.objsize());
b.appendAs( old["name"] , "_id" );
BSONObjIterator i(old);
while ( i.more() ) {
BSONElement e = i.next();
if ( strcmp( "_id" , e.fieldName() ) == 0 ||
strcmp( "name" , e.fieldName() ) == 0 ) {
continue;
}
b.append( e );
}
BSONObj x = b.obj();
log() << old << "\n\t" << x << endl;
newDBs[old["name"].String()] = x;
}
assert( n == newDBs.size() );
conn->remove( ShardNS::database , BSONObj() );
for ( map<string,BSONObj>::iterator i=newDBs.begin(); i!=newDBs.end(); i++ ) {
conn->insert( ShardNS::database , i->second );
}
}
// chunks
{
unsigned num = 0;
map<string,BSONObj> chunks;
auto_ptr<DBClientCursor> c = conn->query( ShardNS::chunk , BSONObj() );
while ( c->more() ) {
BSONObj x = c->next();
BSONObjBuilder b;
string id = Chunk::genID( x["ns"].String() , x["min"].Obj() );
b.append( "_id" , id );
BSONObjIterator i(x);
while ( i.more() ) {
BSONElement e = i.next();
if ( strcmp( e.fieldName() , "_id" ) == 0 )
continue;
b.append( e );
}
BSONObj n = b.obj();
log() << x << "\n\t" << n << endl;
chunks[id] = n;
num++;
}
assert( num == chunks.size() );
conn->remove( ShardNS::chunk , BSONObj() );
for ( map<string,BSONObj>::iterator i=chunks.begin(); i!=chunks.end(); i++ ) {
conn->insert( ShardNS::chunk , i->second );
}
}
conn->update( "config.version" , BSONObj() , BSON( "_id" << 1 << "version" << VERSION ) );
conn.done();
pool.flush();
return 1;
}
log() << "don't know how to upgrade " << cur << " to " << VERSION << endl;
return -8;
}