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/**
* Copyright (C) 2017 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kFTDC
#include "mongo/platform/basic.h"
#include "mongo/db/ftdc/ftdc_mongos.h"
#include <boost/filesystem.hpp>
#include "mongo/db/ftdc/controller.h"
#include "mongo/db/ftdc/ftdc_server.h"
#include "mongo/db/server_parameters.h"
#include "mongo/stdx/thread.h"
#include "mongo/util/log.h"
namespace mongo {
namespace {
/**
* Expose diagnosticDataCollectionDirectoryPath set parameter to specify the MongoS FTDC path.
*/
class ExportedFTDCDirectoryPathParameter : public ServerParameter {
public:
ExportedFTDCDirectoryPathParameter()
: ServerParameter(ServerParameterSet::getGlobal(),
"diagnosticDataCollectionDirectoryPath",
true,
true) {}
void append(OperationContext* opCtx, BSONObjBuilder& b, const std::string& name) final {
stdx::lock_guard<stdx::mutex> guard(_lock);
b.append(name, _path.generic_string());
}
Status set(const BSONElement& newValueElement) {
if (newValueElement.type() != String) {
return Status(ErrorCodes::BadValue,
"diagnosticDataCollectionDirectoryPath only supports type string");
}
std::string str = newValueElement.str();
return setFromString(str);
}
Status setFromString(const std::string& str) final {
stdx::lock_guard<stdx::mutex> guard(_lock);
FTDCController* controller = nullptr;
if (hasGlobalServiceContext()) {
controller = FTDCController::get(getGlobalServiceContext());
}
if (controller) {
Status s = controller->setDirectory(str);
if (!s.isOK()) {
return s;
}
}
_path = str;
return Status::OK();
}
boost::filesystem::path getDirectory() {
stdx::lock_guard<stdx::mutex> guard(_lock);
return _path;
}
void setDirectory(boost::filesystem::path& path) {
stdx::lock_guard<stdx::mutex> guard(_lock);
_path = path;
}
private:
// Lock to guard _path
stdx::mutex _lock;
// Directory location of ftdc files, guarded by _lock
boost::filesystem::path _path;
} exportedFTDCDirectoryPathParameter;
void registerMongoSCollectors(FTDCController* controller) {
// PoolStats
controller->addPeriodicCollector(stdx::make_unique<FTDCSimpleInternalCommandCollector>(
"connPoolStats", "connPoolStats", "", BSON("connPoolStats" << 1)));
}
} // namespace
void startMongoSFTDC() {
// Get the path to use for FTDC:
// 1. Check if the user set one.
// 2. If not, check if the user has a logpath and derive one.
// 3. Otherwise, tell the user FTDC cannot run.
// Only attempt to enable FTDC if we have a path to log files to.
FTDCStartMode startMode = FTDCStartMode::kStart;
auto directory = exportedFTDCDirectoryPathParameter.getDirectory();
if (directory.empty()) {
if (serverGlobalParams.logpath.empty()) {
warning() << "FTDC is disabled because neither '--logpath' nor set parameter "
"'diagnosticDataCollectionDirectoryPath' are specified.";
startMode = FTDCStartMode::kSkipStart;
} else {
directory = boost::filesystem::absolute(
FTDCUtil::getMongoSPath(serverGlobalParams.logpath), serverGlobalParams.cwd);
// Update the server parameter with the computed path.
// Note: If the computed FTDC directory conflicts with an existing file, then FTDC will
// warn about the conflict, and not startup. It will not terminate MongoS in this
// situation.
exportedFTDCDirectoryPathParameter.setDirectory(directory);
}
}
startFTDC(directory, startMode, registerMongoSCollectors);
}
void stopMongoSFTDC() {
stopFTDC();
}
} // namespace mongo
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