mirror of
https://github.com/TwiN/gatus.git
synced 2024-11-22 07:53:38 +01:00
91 lines
2.7 KiB
Go
91 lines
2.7 KiB
Go
package watchdog
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"log"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/TwinProduction/gatus/config"
|
|
"github.com/TwinProduction/gatus/core"
|
|
"github.com/TwinProduction/gatus/metric"
|
|
"github.com/TwinProduction/gatus/storage"
|
|
)
|
|
|
|
var (
|
|
store = storage.NewInMemoryStore()
|
|
|
|
// monitoringMutex is used to prevent multiple services from being evaluated at the same time.
|
|
// Without this, conditions using response time may become inaccurate.
|
|
monitoringMutex sync.Mutex
|
|
)
|
|
|
|
// GetServiceStatusesAsJSON returns a list of core.ServiceStatus for each services encoded using json.Marshal.
|
|
func GetServiceStatusesAsJSON() ([]byte, error) {
|
|
serviceStatuses := store.GetAll()
|
|
data, err := json.Marshal(serviceStatuses)
|
|
return data, err
|
|
}
|
|
|
|
// GetUptimeByServiceGroupAndName returns the uptime of a service based on its group and name
|
|
func GetUptimeByServiceGroupAndName(group, name string) *core.Uptime {
|
|
serviceStatus := store.GetServiceStatus(group, name)
|
|
if serviceStatus == nil {
|
|
return nil
|
|
}
|
|
return serviceStatus.Uptime
|
|
}
|
|
|
|
// Monitor loops over each services and starts a goroutine to monitor each services separately
|
|
func Monitor(cfg *config.Config) {
|
|
for _, service := range cfg.Services {
|
|
go monitor(service)
|
|
// To prevent multiple requests from running at the same time
|
|
time.Sleep(1111 * time.Millisecond)
|
|
}
|
|
}
|
|
|
|
// monitor monitors a single service in a loop
|
|
func monitor(service *core.Service) {
|
|
cfg := config.Get()
|
|
for {
|
|
if !cfg.DisableMonitoringLock {
|
|
// By placing the lock here, we prevent multiple services from being monitored at the exact same time, which
|
|
// could cause performance issues and return inaccurate results
|
|
monitoringMutex.Lock()
|
|
}
|
|
if cfg.Debug {
|
|
log.Printf("[watchdog][monitor] Monitoring serviceName=%s", service.Name)
|
|
}
|
|
result := service.EvaluateHealth()
|
|
metric.PublishMetricsForService(service, result)
|
|
UpdateServiceStatuses(service, result)
|
|
var extra string
|
|
if !result.Success {
|
|
extra = fmt.Sprintf("responseBody=%s", result.Body)
|
|
}
|
|
log.Printf(
|
|
"[watchdog][monitor] Monitored serviceName=%s; success=%v; errors=%d; requestDuration=%s; %s",
|
|
service.Name,
|
|
result.Success,
|
|
len(result.Errors),
|
|
result.Duration.Round(time.Millisecond),
|
|
extra,
|
|
)
|
|
HandleAlerting(service, result)
|
|
if cfg.Debug {
|
|
log.Printf("[watchdog][monitor] Waiting for interval=%s before monitoring serviceName=%s again", service.Interval, service.Name)
|
|
}
|
|
if !cfg.DisableMonitoringLock {
|
|
monitoringMutex.Unlock()
|
|
}
|
|
time.Sleep(service.Interval)
|
|
}
|
|
}
|
|
|
|
// UpdateServiceStatuses updates the slice of service statuses
|
|
func UpdateServiceStatuses(service *core.Service, result *core.Result) {
|
|
store.Insert(service, result)
|
|
}
|