void CheckVersionFeature::validateOptions(
std::shared_ptr<ProgramOptions> options) {
if (!_checkVersion) {
return;
}
ApplicationServer::forceDisableFeatures(_nonServerFeatures);
LoggerFeature* logger =
ApplicationServer::getFeature<LoggerFeature>("Logger");
logger->disableThreaded();
DatabaseFeature* databaseFeature =
ApplicationServer::getFeature<DatabaseFeature>("Database");
databaseFeature->disableReplicationApplier();
databaseFeature->enableCheckVersion();
V8DealerFeature* v8dealer =
ApplicationServer::getFeature<V8DealerFeature>("V8Dealer");
v8dealer->setNumberContexts(1);
}
void SupervisorFeature::daemonize() {
static time_t const MIN_TIME_ALIVE_IN_SEC = 30;
if (!_supervisor) {
return;
}
time_t startTime = time(0);
time_t t;
bool done = false;
int result = EXIT_SUCCESS;
std::vector<ApplicationFeature*> supervisorFeatures(_supervisorStart.size());
std::transform(_supervisorStart.begin(), _supervisorStart.end(),
supervisorFeatures.begin(), [](std::string const& name) {
try {
return ApplicationServer::getFeature<ApplicationFeature>(name);
} catch (...) {
LOG_TOPIC(FATAL, Logger::STARTUP)
<< "unknown feature '" << name << "', giving up";
FATAL_ERROR_EXIT();
}
});
while (!done) {
// fork of the server
_clientPid = fork();
if (_clientPid < 0) {
LOG_TOPIC(FATAL, Logger::STARTUP) << "fork failed, giving up";
FATAL_ERROR_EXIT();
}
// parent (supervisor)
if (0 < _clientPid) {
TRI_SetProcessTitle("arangodb [supervisor]");
std::for_each(supervisorFeatures.begin(), supervisorFeatures.end(),
[](ApplicationFeature* feature) {
LoggerFeature* logger =
dynamic_cast<LoggerFeature*>(feature);
if (logger != nullptr) {
logger->setSupervisor(true);
logger->disableThreaded();
}
});
std::for_each(supervisorFeatures.begin(), supervisorFeatures.end(),
[](ApplicationFeature* feature) { feature->prepare(); });
std::for_each(supervisorFeatures.begin(), supervisorFeatures.end(),
[](ApplicationFeature* feature) { feature->start(); });
LOG_TOPIC(DEBUG, Logger::STARTUP) << "supervisor mode: within parent";
ArangoGlobalContext::CONTEXT->unmaskStandardSignals();
signal(SIGINT, StopHandler);
signal(SIGTERM, StopHandler);
CLIENT_PID = _clientPid;
DONE = false;
int status;
int res = waitpid(_clientPid, &status, 0);
bool horrible = true;
if (!DONE) {
done = true;
horrible = false;
}
else {
LOG_TOPIC(DEBUG, Logger::STARTUP) << "waitpid woke up with return value "
<< res << " and status " << status;
if (WIFEXITED(status)) {
// give information about cause of death
if (WEXITSTATUS(status) == 0) {
LOG_TOPIC(INFO, Logger::STARTUP) << "child " << _clientPid
<< " died of natural causes";
done = true;
horrible = false;
} else {
t = time(0) - startTime;
LOG_TOPIC(ERR, Logger::STARTUP)
<< "child " << _clientPid
<< " died a horrible death, exit status " << WEXITSTATUS(status);
if (t < MIN_TIME_ALIVE_IN_SEC) {
LOG_TOPIC(ERR, Logger::STARTUP)
<< "child only survived for " << t
<< " seconds, this will not work - please fix the error "
"first";
done = true;
} else {
done = false;
}
}
} else if (WIFSIGNALED(status)) {
switch (WTERMSIG(status)) {
case 2:
case 9:
case 15:
LOG_TOPIC(INFO, Logger::STARTUP)
<< "child " << _clientPid
<< " died of natural causes, exit status " << WTERMSIG(status);
done = true;
horrible = false;
break;
default:
t = time(0) - startTime;
LOG_TOPIC(ERR, Logger::STARTUP) << "child " << _clientPid
<< " died a horrible death, signal "
<< WTERMSIG(status);
if (t < MIN_TIME_ALIVE_IN_SEC) {
LOG_TOPIC(ERR, Logger::STARTUP)
<< "child only survived for " << t
<< " seconds, this will not work - please fix the "
"error first";
done = true;
#ifdef WCOREDUMP
if (WCOREDUMP(status)) {
LOG_TOPIC(WARN, Logger::STARTUP) << "child process "
<< _clientPid
<< " produced a core dump";
}
#endif
} else {
done = false;
}
break;
}
} else {
LOG_TOPIC(ERR, Logger::STARTUP)
<< "child " << _clientPid
<< " died a horrible death, unknown cause";
done = false;
}
}
if (horrible) {
result = EXIT_FAILURE;
}
}
// child - run the normal boot sequence
else {
LOG_TOPIC(DEBUG, Logger::STARTUP) << "supervisor mode: within child";
TRI_SetProcessTitle("arangodb [server]");
#ifdef TRI_HAVE_PRCTL
// force child to stop if supervisor dies
prctl(PR_SET_PDEATHSIG, SIGTERM, 0, 0, 0);
#endif
try {
DaemonFeature* daemon = ApplicationServer::getFeature<DaemonFeature>("Daemon");
// disable daemon mode
daemon->setDaemon(false);
} catch (...) {
}
return;
}
}
std::for_each(supervisorFeatures.rbegin(), supervisorFeatures.rend(),
[](ApplicationFeature* feature) { feature->stop(); });
std::for_each(supervisorFeatures.rbegin(), supervisorFeatures.rend(),
[](ApplicationFeature* feature) { feature->unprepare(); });
exit(result);
}