func (s *Schedule) executeExpr(T miniprofiler.Timer, rh *RunHistory, a *conf.Alert, e *expr.Expr) (*expr.Results, error) {
if e == nil {
return nil, nil
}
results, _, err := e.Execute(rh.Context, rh.GraphiteContext, rh.Logstash, rh.Elastic, rh.InfluxConfig, rh.Cache, T, rh.Start, 0, a.UnjoinedOK, s.Search, s.Conf.AlertSquelched(a), s)
return results, err
}
func (s *Schedule) executeExpr(T miniprofiler.Timer, rh *RunHistory, a *conf.Alert, e *expr.Expr) (*expr.Results, error) {
if e == nil {
return nil, nil
}
providers := &expr.BosunProviders{
Cache: rh.Cache,
Search: s.Search,
Squelched: s.RuleConf.AlertSquelched(a),
History: s,
}
results, _, err := e.Execute(rh.Backends, providers, T, rh.Start, 0, a.UnjoinedOK)
return results, err
}
func (c *Context) evalExpr(e *expr.Expr, filter bool, series bool, autods int) (expr.ResultSlice, string, error) {
var err error
if filter {
e, err = expr.New(opentsdb.ReplaceTags(e.Text, c.State.Group), c.schedule.Conf.Funcs())
if err != nil {
return nil, "", err
}
}
if series && e.Root.Return() != parse.TypeSeriesSet {
return nil, "", fmt.Errorf("need a series, got %T (%v)", e, e)
}
res, _, err := e.Execute(c.runHistory.Context, c.runHistory.GraphiteContext, c.runHistory.Logstash, c.runHistory.Cache, nil, c.runHistory.Start, autods, c.Alert.UnjoinedOK, c.schedule.Search, c.schedule.Conf.AlertSquelched(c.Alert), c.runHistory)
if err != nil {
return nil, "", fmt.Errorf("%s: %v", e, err)
}
return res.Results, e.String(), nil
}
func (c *Context) evalExpr(e *expr.Expr, filter bool, series bool, autods int) (expr.ResultSlice, string, error) {
var err error
if filter {
e, err = expr.New(opentsdb.ReplaceTags(e.Text, c.AlertKey.Group()), c.schedule.RuleConf.GetFuncs(c.schedule.SystemConf.EnabledBackends()))
if err != nil {
return nil, "", err
}
}
if series && e.Root.Return() != models.TypeSeriesSet {
return nil, "", fmt.Errorf("need a series, got %T (%v)", e, e)
}
providers := &expr.BosunProviders{
Cache: c.runHistory.Cache,
Search: c.schedule.Search,
Squelched: c.schedule.RuleConf.AlertSquelched(c.Alert),
History: c.schedule,
}
res, _, err := e.Execute(c.runHistory.Backends, providers, nil, c.runHistory.Start, autods, c.Alert.UnjoinedOK)
if err != nil {
return nil, "", fmt.Errorf("%s: %v", e, err)
}
return res.Results, e.String(), nil
}
func (s *Schedule) executeExpr(T miniprofiler.Timer, rh *RunHistory, a *conf.Alert, e *expr.Expr) (*expr.Results, error) {
if e == nil {
return nil, nil
}
results, _, err := e.Execute(rh.Context, rh.GraphiteContext, rh.Logstash, rh.Cache, T, rh.Start, 0, a.UnjoinedOK, s.Search, s.Conf.AlertSquelched(a), rh)
if err != nil {
ak := expr.NewAlertKey(a.Name, nil)
rh.Events[ak] = &Event{
Status: StError,
Error: &Result{
Result: &expr.Result{
Computations: []expr.Computation{
{
Text: e.String(),
Value: err.Error(),
},
},
},
},
}
return nil, err
}
return results, err
}
func (s *Schedule) CheckExpr(T miniprofiler.Timer, rh *RunHistory, a *conf.Alert, e *expr.Expr, checkStatus models.Status, ignore models.AlertKeys) (alerts models.AlertKeys, err error) {
if e == nil {
return
}
defer func() {
if err == nil {
return
}
collect.Add("check.errs", opentsdb.TagSet{"metric": a.Name}, 1)
slog.Errorln(err)
}()
results, err := s.executeExpr(T, rh, a, e)
if err != nil {
return nil, err
}
Loop:
for _, r := range results.Results {
if s.Conf.Squelched(a, r.Group) {
continue
}
ak := models.NewAlertKey(a.Name, r.Group)
for _, v := range ignore {
if ak == v {
continue Loop
}
}
var n float64
n, err = valueToFloat(r.Value)
if err != nil {
return
}
event := rh.Events[ak]
if event == nil {
event = new(models.Event)
rh.Events[ak] = event
}
result := &models.Result{
Computations: r.Computations,
Value: models.Float(n),
Expr: e.String(),
}
switch checkStatus {
case models.StWarning:
event.Warn = result
case models.StCritical:
event.Crit = result
}
status := checkStatus
if math.IsNaN(n) {
status = checkStatus
} else if n == 0 {
status = models.StNormal
}
if status != models.StNormal {
alerts = append(alerts, ak)
}
if status > rh.Events[ak].Status {
event.Status = status
}
}
return
}
func (s *Schedule) CheckExpr(T miniprofiler.Timer, rh *RunHistory, a *conf.Alert, e *expr.Expr, checkStatus Status, ignore expr.AlertKeys) (alerts expr.AlertKeys, err error) {
if e == nil {
return
}
defer func() {
if err == nil {
return
}
collect.Add("check.errs", opentsdb.TagSet{"metric": a.Name}, 1)
slog.Errorln(err)
}()
results, err := s.executeExpr(T, rh, a, e)
if err != nil {
return nil, err
}
Loop:
for _, r := range results.Results {
if s.Conf.Squelched(a, r.Group) {
continue
}
ak := expr.NewAlertKey(a.Name, r.Group)
for _, v := range ignore {
if ak == v {
continue Loop
}
}
var n float64
switch v := r.Value.(type) {
case expr.Number:
n = float64(v)
case expr.Scalar:
n = float64(v)
default:
err = fmt.Errorf("expected number or scalar")
return
}
event := rh.Events[ak]
if event == nil {
event = new(Event)
rh.Events[ak] = event
}
result := &Result{
Result: r,
Expr: e.String(),
}
switch checkStatus {
case StWarning:
event.Warn = result
case StCritical:
event.Crit = result
}
status := checkStatus
if math.IsNaN(n) {
status = StError
} else if n == 0 {
status = StNormal
}
if status != StNormal {
alerts = append(alerts, ak)
}
if status > rh.Events[ak].Status {
event.Status = status
}
}
return
}
func (s *Schedule) CheckExpr(T miniprofiler.Timer, rh *RunHistory, a *conf.Alert, e *expr.Expr, checkStatus models.Status, ignore models.AlertKeys) (alerts models.AlertKeys, err error, cancelled bool) {
if e == nil {
return
}
defer func() {
if err == nil {
return
}
collect.Add("check.errs", opentsdb.TagSet{"metric": a.Name}, 1)
slog.Errorln(err)
}()
type res struct {
results *expr.Results
error error
}
// See s.CheckAlert for an explanation of execution and cancellation with this channel
rc := make(chan res, 1)
var results *expr.Results
go func() {
results, err := s.executeExpr(T, rh, a, e)
rc <- res{results, err}
}()
select {
case res := <-rc:
results = res.results
err = res.error
case <-s.runnerContext.Done():
return nil, nil, true
}
if err != nil {
return
}
Loop:
for _, r := range results.Results {
if s.RuleConf.Squelched(a, r.Group) {
continue
}
ak := models.NewAlertKey(a.Name, r.Group)
for _, v := range ignore {
if ak == v {
continue Loop
}
}
var n float64
n, err = valueToFloat(r.Value)
if err != nil {
return
}
event := rh.Events[ak]
if event == nil {
event = new(models.Event)
rh.Events[ak] = event
}
result := &models.Result{
Computations: r.Computations,
Value: models.Float(n),
Expr: e.String(),
}
switch checkStatus {
case models.StWarning:
event.Warn = result
case models.StCritical:
event.Crit = result
}
status := checkStatus
if math.IsNaN(n) {
status = checkStatus
} else if n == 0 {
status = models.StNormal
}
if status != models.StNormal {
alerts = append(alerts, ak)
}
if status > rh.Events[ak].Status {
event.Status = status
}
}
return
}