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/**
* Copyright (C) 2021-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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.
*/
#include "mongo/db/process_health/health_observer_base.h"
#include "mongo/db/process_health/deadline_future.h"
#include "mongo/db/service_context.h"
#include "mongo/logv2/log.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kProcessHealth
namespace mongo {
namespace process_health {
HealthObserverBase::HealthObserverBase(ServiceContext* svcCtx)
: _svcCtx(svcCtx), _rand(PseudoRandom(SecureRandom().nextInt64())) {}
SharedSemiFuture<HealthCheckStatus> HealthObserverBase::periodicCheck(
std::shared_ptr<executor::TaskExecutor> taskExecutor, CancellationToken token) noexcept {
// If we have reached here, the intensity of this health observer must not be off
{
LOGV2_DEBUG(6007902, 2, "Start periodic health check", "observerType"_attr = getType());
const auto now = _svcCtx->getPreciseClockSource()->now();
auto lk = stdx::lock_guard(_mutex);
_lastTimeTheCheckWasRun = now;
_currentlyRunningHealthCheck = true;
}
_deadlineFuture = DeadlineFuture<HealthCheckStatus>::create(
taskExecutor,
periodicCheckImpl({token, taskExecutor})
.onCompletion([this](StatusWith<HealthCheckStatus> status) {
const auto now = _svcCtx->getPreciseClockSource()->now();
auto lk = stdx::lock_guard(_mutex);
++_completedChecksCount;
invariant(_currentlyRunningHealthCheck);
_currentlyRunningHealthCheck = false;
_lastTimeCheckCompleted = now;
if (!status.isOK() ||
!HealthCheckStatus::isResolved(status.getValue().getSeverity())) {
++_completedChecksWithFaultCount;
}
return status;
}),
getObserverTimeout());
return _deadlineFuture->get();
}
HealthCheckStatus HealthObserverBase::makeHealthyStatus() const {
return makeHealthyStatusWithType(getType());
}
HealthCheckStatus HealthObserverBase::makeHealthyStatusWithType(FaultFacetType type) {
return HealthCheckStatus(type);
}
HealthCheckStatus HealthObserverBase::makeSimpleFailedStatus(Severity severity,
std::vector<Status>&& failures) const {
return makeSimpleFailedStatusWithType(getType(), severity, std::move(failures));
}
HealthCheckStatus HealthObserverBase::makeSimpleFailedStatusWithType(
FaultFacetType type, Severity severity, std::vector<Status>&& failures) {
if (severity == Severity::kOk) {
LOGV2_WARNING(6007903,
"Creating faulty health check status requires non-ok severity",
"observerType"_attr = type);
}
StringBuilder sb;
for (const auto& s : failures) {
sb.append(s.toString());
sb.append(" ");
}
return HealthCheckStatus(type, severity, sb.stringData());
}
HealthObserverLivenessStats HealthObserverBase::getStats() const {
auto lk = stdx::lock_guard(_mutex);
return getStatsLocked(lk);
}
HealthObserverLivenessStats HealthObserverBase::getStatsLocked(WithLock) const {
HealthObserverLivenessStats stats;
stats.currentlyRunningHealthCheck = _currentlyRunningHealthCheck;
stats.lastTimeCheckStarted = _lastTimeTheCheckWasRun;
stats.lastTimeCheckCompleted = _lastTimeCheckCompleted;
stats.completedChecksCount = _completedChecksCount;
stats.completedChecksWithFaultCount = _completedChecksWithFaultCount;
return stats;
}
Milliseconds HealthObserverBase::healthCheckJitter() const {
return randDuration(FaultManagerConfig::kPeriodicHealthCheckMaxJitter);
}
} // namespace process_health
} // namespace mongo
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