gatus/watchdog/alerting.go

108 lines
3.9 KiB
Go

package watchdog
import (
"encoding/json"
"log"
"github.com/TwinProduction/gatus/config"
"github.com/TwinProduction/gatus/core"
)
// HandleAlerting takes care of alerts to resolve and alerts to trigger based on result success or failure
func HandleAlerting(service *core.Service, result *core.Result) {
cfg := config.Get()
if cfg.Alerting == nil {
return
}
if result.Success {
handleAlertsToResolve(service, result, cfg)
} else {
handleAlertsToTrigger(service, result, cfg)
}
}
func handleAlertsToTrigger(service *core.Service, result *core.Result, cfg *config.Config) {
service.NumberOfSuccessesInARow = 0
service.NumberOfFailuresInARow++
for _, alert := range service.Alerts {
// If the alert hasn't been triggered, move to the next one
if !alert.Enabled || alert.FailureThreshold != service.NumberOfFailuresInARow {
continue
}
if alert.Triggered {
if cfg.Debug {
log.Printf("[watchdog][handleAlertsToTrigger] Alert with description='%s' has already been TRIGGERED, skipping", alert.Description)
}
continue
}
alertProvider := config.GetAlertingProviderByAlertType(cfg, alert.Type)
if alertProvider != nil && alertProvider.IsValid() {
log.Printf("[watchdog][handleAlertsToTrigger] Sending %s alert because alert with description='%s' has been TRIGGERED", alert.Type, alert.Description)
customAlertProvider := alertProvider.ToCustomAlertProvider(service, alert, result, false)
// TODO: retry on error
var err error
// We need to extract the DedupKey from PagerDuty's response
if alert.Type == core.PagerDutyAlert {
var body []byte
body, err = customAlertProvider.Send(service.Name, alert.Description, false)
if err == nil {
var response pagerDutyResponse
err = json.Unmarshal(body, &response)
if err != nil {
log.Printf("[watchdog][handleAlertsToTrigger] Ran into error unmarshaling pager duty response: %s", err.Error())
} else {
alert.ResolveKey = response.DedupKey
}
}
} else {
// All other alert types don't need to extract anything from the body, so we can just send the request right away
_, err = customAlertProvider.Send(service.Name, alert.Description, false)
}
if err != nil {
log.Printf("[watchdog][handleAlertsToTrigger] Ran into error sending an alert: %s", err.Error())
} else {
alert.Triggered = true
}
} else {
log.Printf("[watchdog][handleAlertsToResolve] Not sending alert of type=%s despite being TRIGGERED, because the provider wasn't configured properly", alert.Type)
}
}
}
func handleAlertsToResolve(service *core.Service, result *core.Result, cfg *config.Config) {
service.NumberOfSuccessesInARow++
for _, alert := range service.Alerts {
if !alert.Enabled || !alert.Triggered || alert.SuccessThreshold > service.NumberOfSuccessesInARow {
continue
}
alert.Triggered = false
if !alert.SendOnResolved {
continue
}
alertProvider := config.GetAlertingProviderByAlertType(cfg, alert.Type)
if alertProvider != nil && alertProvider.IsValid() {
log.Printf("[watchdog][handleAlertsToResolve] Sending %s alert because alert with description='%s' has been RESOLVED", alert.Type, alert.Description)
customAlertProvider := alertProvider.ToCustomAlertProvider(service, alert, result, true)
// TODO: retry on error
_, err := customAlertProvider.Send(service.Name, alert.Description, true)
if err != nil {
log.Printf("[watchdog][handleAlertsToResolve] Ran into error sending an alert: %s", err.Error())
} else {
if alert.Type == core.PagerDutyAlert {
alert.ResolveKey = ""
}
}
} else {
log.Printf("[watchdog][handleAlertsToResolve] Not sending alert of type=%s despite being RESOLVED, because the provider wasn't configured properly", alert.Type)
}
}
service.NumberOfFailuresInARow = 0
}
type pagerDutyResponse struct {
Status string `json:"status"`
Message string `json:"message"`
DedupKey string `json:"dedup_key"`
}