mirror of
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103 lines
3.1 KiB
Go
103 lines
3.1 KiB
Go
package alerting
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import (
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"time"
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"github.com/grafana/grafana/pkg/bus"
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"github.com/grafana/grafana/pkg/components/simplejson"
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"github.com/grafana/grafana/pkg/infra/metrics"
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"github.com/grafana/grafana/pkg/log"
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m "github.com/grafana/grafana/pkg/models"
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"github.com/grafana/grafana/pkg/services/annotations"
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"github.com/grafana/grafana/pkg/services/rendering"
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)
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type ResultHandler interface {
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Handle(evalContext *EvalContext) error
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}
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type DefaultResultHandler struct {
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notifier NotificationService
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log log.Logger
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}
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func NewResultHandler(renderService rendering.Service) *DefaultResultHandler {
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return &DefaultResultHandler{
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log: log.New("alerting.resultHandler"),
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notifier: NewNotificationService(renderService),
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}
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}
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func (handler *DefaultResultHandler) Handle(evalContext *EvalContext) error {
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executionError := ""
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annotationData := simplejson.New()
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if len(evalContext.EvalMatches) > 0 {
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annotationData.Set("evalMatches", simplejson.NewFromAny(evalContext.EvalMatches))
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}
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if evalContext.Error != nil {
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executionError = evalContext.Error.Error()
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annotationData.Set("error", executionError)
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} else if evalContext.NoDataFound {
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annotationData.Set("noData", true)
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}
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metrics.M_Alerting_Result_State.WithLabelValues(string(evalContext.Rule.State)).Inc()
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if evalContext.ShouldUpdateAlertState() {
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handler.log.Info("New state change", "alertId", evalContext.Rule.Id, "newState", evalContext.Rule.State, "prev state", evalContext.PrevAlertState)
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cmd := &m.SetAlertStateCommand{
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AlertId: evalContext.Rule.Id,
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OrgId: evalContext.Rule.OrgId,
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State: evalContext.Rule.State,
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Error: executionError,
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EvalData: annotationData,
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}
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if err := bus.Dispatch(cmd); err != nil {
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if err == m.ErrCannotChangeStateOnPausedAlert {
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handler.log.Error("Cannot change state on alert that's paused", "error", err)
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return err
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}
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if err == m.ErrRequiresNewState {
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handler.log.Info("Alert already updated")
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return nil
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}
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handler.log.Error("Failed to save state", "error", err)
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} else {
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// StateChanges is used for de duping alert notifications
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// when two servers are raising. This makes sure that the server
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// with the last state change always sends a notification.
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evalContext.Rule.StateChanges = cmd.Result.StateChanges
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// Update the last state change of the alert rule in memory
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evalContext.Rule.LastStateChange = time.Now()
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}
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// save annotation
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item := annotations.Item{
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OrgId: evalContext.Rule.OrgId,
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DashboardId: evalContext.Rule.DashboardId,
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PanelId: evalContext.Rule.PanelId,
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AlertId: evalContext.Rule.Id,
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Text: "",
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NewState: string(evalContext.Rule.State),
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PrevState: string(evalContext.PrevAlertState),
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Epoch: time.Now().UnixNano() / int64(time.Millisecond),
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Data: annotationData,
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}
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annotationRepo := annotations.GetRepository()
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if err := annotationRepo.Save(&item); err != nil {
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handler.log.Error("Failed to save annotation for new alert state", "error", err)
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}
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}
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handler.notifier.SendIfNeeded(evalContext)
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return nil
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}
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