コード例 #1
0
ファイル: alert.go プロジェクト: wutaizeng/kapacitor
// Create a new  AlertNode which caches the most recent item and exposes it over the HTTP API.
func newAlertNode(et *ExecutingTask, n *pipeline.AlertNode, l *log.Logger) (an *AlertNode, err error) {
	an = &AlertNode{
		node: node{Node: n, et: et, logger: l},
		a:    n,
	}
	an.node.runF = an.runAlert

	// Create buffer pool for the templates
	an.bufPool = sync.Pool{
		New: func() interface{} {
			return new(bytes.Buffer)
		},
	}

	// Parse templates
	an.idTmpl, err = text.New("id").Parse(n.Id)
	if err != nil {
		return nil, err
	}

	an.messageTmpl, err = text.New("message").Parse(n.Message)
	if err != nil {
		return nil, err
	}

	an.detailsTmpl, err = html.New("details").Funcs(html.FuncMap{
		"json": func(v interface{}) html.JS {

			tmpBuffer := an.bufPool.Get().(*bytes.Buffer)
			defer func() {
				tmpBuffer.Reset()
				an.bufPool.Put(tmpBuffer)
			}()

			json.NewEncoder(tmpBuffer).Encode(v)

			return html.JS(tmpBuffer.String())
		},
	}).Parse(n.Details)
	if err != nil {
		return nil, err
	}

	// Construct alert handlers
	an.handlers = make([]AlertHandler, 0)

	for _, post := range n.PostHandlers {
		post := post
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handlePost(post, ad) })
	}

	for _, email := range n.EmailHandlers {
		email := email
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleEmail(email, ad) })
	}
	if len(n.EmailHandlers) == 0 && (et.tm.SMTPService != nil && et.tm.SMTPService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleEmail(&pipeline.EmailHandler{}, ad) })
	}
	// If email has been configured with state changes only set it.
	if et.tm.SMTPService != nil &&
		et.tm.SMTPService.Global() &&
		et.tm.SMTPService.StateChangesOnly() {
		n.IsStateChangesOnly = true
	}

	for _, exec := range n.ExecHandlers {
		exec := exec
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleExec(exec, ad) })
	}

	for _, log := range n.LogHandlers {
		log := log
		if !filepath.IsAbs(log.FilePath) {
			return nil, fmt.Errorf("alert log path must be absolute: %s is not absolute", log.FilePath)
		}
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleLog(log, ad) })
	}

	for _, vo := range n.VictorOpsHandlers {
		vo := vo
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleVictorOps(vo, ad) })
	}
	if len(n.VictorOpsHandlers) == 0 && (et.tm.VictorOpsService != nil && et.tm.VictorOpsService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleVictorOps(&pipeline.VictorOpsHandler{}, ad) })
	}

	for _, pd := range n.PagerDutyHandlers {
		pd := pd
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handlePagerDuty(pd, ad) })
	}
	if len(n.PagerDutyHandlers) == 0 && (et.tm.PagerDutyService != nil && et.tm.PagerDutyService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handlePagerDuty(&pipeline.PagerDutyHandler{}, ad) })
	}

	for _, sensu := range n.SensuHandlers {
		sensu := sensu
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleSensu(sensu, ad) })
	}

	for _, slack := range n.SlackHandlers {
		slack := slack
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleSlack(slack, ad) })
	}
	if len(n.SlackHandlers) == 0 && (et.tm.SlackService != nil && et.tm.SlackService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleSlack(&pipeline.SlackHandler{}, ad) })
	}
	// If slack has been configured with state changes only set it.
	if et.tm.SlackService != nil &&
		et.tm.SlackService.Global() &&
		et.tm.SlackService.StateChangesOnly() {
		n.IsStateChangesOnly = true
	}

	for _, telegram := range n.TelegramHandlers {
		telegram := telegram
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleTelegram(telegram, ad) })
	}
	if len(n.TelegramHandlers) == 0 && (et.tm.TelegramService != nil && et.tm.TelegramService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleTelegram(&pipeline.TelegramHandler{}, ad) })
	}
	// If telegram has been configured with state changes only set it.
	if et.tm.TelegramService != nil &&
		et.tm.TelegramService.Global() &&
		et.tm.TelegramService.StateChangesOnly() {
		n.IsStateChangesOnly = true
	}

	for _, hipchat := range n.HipChatHandlers {
		hipchat := hipchat
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleHipChat(hipchat, ad) })
	}
	if len(n.HipChatHandlers) == 0 && (et.tm.HipChatService != nil && et.tm.HipChatService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleHipChat(&pipeline.HipChatHandler{}, ad) })
	}
	// If HipChat has been configured with state changes only set it.
	if et.tm.HipChatService != nil &&
		et.tm.HipChatService.Global() &&
		et.tm.HipChatService.StateChangesOnly() {
		n.IsStateChangesOnly = true
	}

	for _, alerta := range n.AlertaHandlers {
		// Validate alerta templates
		rtmpl, err := text.New("resource").Parse(alerta.Resource)
		if err != nil {
			return nil, err
		}
		evtmpl, err := text.New("event").Parse(alerta.Event)
		if err != nil {
			return nil, err
		}
		etmpl, err := text.New("environment").Parse(alerta.Environment)
		if err != nil {
			return nil, err
		}
		gtmpl, err := text.New("group").Parse(alerta.Group)
		if err != nil {
			return nil, err
		}
		vtmpl, err := text.New("value").Parse(alerta.Value)
		if err != nil {
			return nil, err
		}
		ai := alertaHandler{
			AlertaHandler:   alerta,
			resourceTmpl:    rtmpl,
			eventTmpl:       evtmpl,
			environmentTmpl: etmpl,
			groupTmpl:       gtmpl,
			valueTmpl:       vtmpl,
		}
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleAlerta(ai, ad) })
	}

	for _, og := range n.OpsGenieHandlers {
		og := og
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleOpsGenie(og, ad) })
	}
	if len(n.OpsGenieHandlers) == 0 && (et.tm.OpsGenieService != nil && et.tm.OpsGenieService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleOpsGenie(&pipeline.OpsGenieHandler{}, ad) })
	}

	for _, talk := range n.TalkHandlers {
		talk := talk
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleTalk(talk, ad) })
	}

	// Parse level expressions
	an.levels = make([]stateful.Expression, CritAlert+1)
	an.scopePools = make([]stateful.ScopePool, CritAlert+1)

	if n.Info != nil {
		statefulExpression, expressionCompileError := stateful.NewExpression(n.Info.Expression)
		if expressionCompileError != nil {
			return nil, fmt.Errorf("Failed to compile stateful expression for info: %s", expressionCompileError)
		}

		an.levels[InfoAlert] = statefulExpression
		an.scopePools[InfoAlert] = stateful.NewScopePool(stateful.FindReferenceVariables(n.Info.Expression))
	}

	if n.Warn != nil {
		statefulExpression, expressionCompileError := stateful.NewExpression(n.Warn.Expression)
		if expressionCompileError != nil {
			return nil, fmt.Errorf("Failed to compile stateful expression for warn: %s", expressionCompileError)
		}
		an.levels[WarnAlert] = statefulExpression
		an.scopePools[WarnAlert] = stateful.NewScopePool(stateful.FindReferenceVariables(n.Warn.Expression))
	}

	if n.Crit != nil {
		statefulExpression, expressionCompileError := stateful.NewExpression(n.Crit.Expression)
		if expressionCompileError != nil {
			return nil, fmt.Errorf("Failed to compile stateful expression for crit: %s", expressionCompileError)
		}
		an.levels[CritAlert] = statefulExpression
		an.scopePools[CritAlert] = stateful.NewScopePool(stateful.FindReferenceVariables(n.Crit.Expression))
	}

	// Setup states
	if n.History < 2 {
		n.History = 2
	}
	an.states = make(map[models.GroupID]*alertState)

	// Configure flapping
	if n.UseFlapping {
		if n.FlapLow > 1 || n.FlapHigh > 1 {
			return nil, errors.New("alert flap thresholds are percentages and should be between 0 and 1")
		}
	}

	return
}
コード例 #2
0
ファイル: alert.go プロジェクト: md14454/kapacitor
// Create a new  AlertNode which caches the most recent item and exposes it over the HTTP API.
func newAlertNode(et *ExecutingTask, n *pipeline.AlertNode) (an *AlertNode, err error) {
	an = &AlertNode{
		node: node{Node: n, et: et},
		a:    n,
	}
	an.node.runF = an.runAlert

	// Parse templates
	tmpl, err := template.New("id").Parse(n.Id)
	if err != nil {
		return nil, err
	}
	an.idTmpl = tmpl
	tmpl, err = template.New("message").Parse(n.Message)
	if err != nil {
		return nil, err
	}
	an.messageTmpl = tmpl

	// Construct alert handlers
	an.handlers = make([]AlertHandler, 0)

	for _, post := range n.PostHandlers {
		post := post
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handlePost(post, ad) })
	}

	for _, email := range n.EmailHandlers {
		email := email
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleEmail(email, ad) })
	}
	if len(n.EmailHandlers) == 0 && (et.tm.SMTPService != nil && et.tm.SMTPService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleEmail(&pipeline.EmailHandler{}, ad) })
	}
	// If email has been configured globally only send state changes.
	if et.tm.SMTPService != nil && et.tm.SMTPService.Global() {
		n.IsStateChangesOnly = true
	}

	for _, exec := range n.ExecHandlers {
		exec := exec
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleExec(exec, ad) })
	}

	for _, log := range n.LogHandlers {
		log := log
		if !path.IsAbs(log.FilePath) {
			return nil, fmt.Errorf("alert log path must be absolute: %s is not absolute", log.FilePath)
		}
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleLog(log, ad) })
	}

	for _, vo := range n.VictorOpsHandlers {
		vo := vo
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleVictorOps(vo, ad) })
	}
	if len(n.VictorOpsHandlers) == 0 && (et.tm.VictorOpsService != nil && et.tm.VictorOpsService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleVictorOps(&pipeline.VictorOpsHandler{}, ad) })
	}

	for _, pd := range n.PagerDutyHandlers {
		pd := pd
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handlePagerDuty(pd, ad) })
	}
	if len(n.PagerDutyHandlers) == 0 && (et.tm.PagerDutyService != nil && et.tm.PagerDutyService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handlePagerDuty(&pipeline.PagerDutyHandler{}, ad) })
	}

	for _, slack := range n.SlackHandlers {
		slack := slack
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleSlack(slack, ad) })
	}
	if len(n.SlackHandlers) == 0 && (et.tm.SlackService != nil && et.tm.SlackService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleSlack(&pipeline.SlackHandler{}, ad) })
	}
	// If slack has been configured globally only send state changes.
	if et.tm.SlackService != nil && et.tm.SlackService.Global() {
		n.IsStateChangesOnly = true
	}

	for _, hipchat := range n.HipChatHandlers {
		hipchat := hipchat
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleHipChat(hipchat, ad) })
	}
	if len(n.HipChatHandlers) == 0 && (et.tm.HipChatService != nil && et.tm.HipChatService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleHipChat(&pipeline.HipChatHandler{}, ad) })
	}
	// If HipChat has been configured globally only send state changes.
	if et.tm.HipChatService != nil && et.tm.HipChatService.Global() {
		n.IsStateChangesOnly = true
	}

	for _, og := range n.OpsGenieHandlers {
		og := og
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleOpsGenie(og, ad) })
	}
	if len(n.OpsGenieHandlers) == 0 && (et.tm.OpsGenieService != nil && et.tm.OpsGenieService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleOpsGenie(&pipeline.OpsGenieHandler{}, ad) })
	}

	// Parse level expressions
	an.levels = make([]*tick.StatefulExpr, CritAlert+1)
	if n.Info != nil {
		an.levels[InfoAlert] = tick.NewStatefulExpr(n.Info)
	}
	if n.Warn != nil {
		an.levels[WarnAlert] = tick.NewStatefulExpr(n.Warn)
	}
	if n.Crit != nil {
		an.levels[CritAlert] = tick.NewStatefulExpr(n.Crit)
	}
	// Setup states
	if n.History < 2 {
		n.History = 2
	}
	an.states = make(map[models.GroupID]*alertState)

	// Configure flapping
	if n.UseFlapping {
		if n.FlapLow > 1 || n.FlapHigh > 1 {
			return nil, errors.New("alert flap thresholds are percentages and should be between 0 and 1")
		}
	}

	return
}
コード例 #3
0
ファイル: alert.go プロジェクト: karlitxo/kapacitor
// Create a new  AlertNode which caches the most recent item and exposes it over the HTTP API.
func newAlertNode(et *ExecutingTask, n *pipeline.AlertNode, l *log.Logger) (an *AlertNode, err error) {
	an = &AlertNode{
		node: node{Node: n, et: et, logger: l},
		a:    n,
	}
	an.node.runF = an.runAlert

	// Parse templates
	an.idTmpl, err = text.New("id").Parse(n.Id)
	if err != nil {
		return nil, err
	}

	an.messageTmpl, err = text.New("message").Parse(n.Message)
	if err != nil {
		return nil, err
	}

	an.detailsTmpl, err = html.New("details").Funcs(html.FuncMap{
		"json": func(v interface{}) html.JS {
			a, _ := json.Marshal(v)
			return html.JS(a)
		},
	}).Parse(n.Details)
	if err != nil {
		return nil, err
	}

	// Construct alert handlers
	an.handlers = make([]AlertHandler, 0)

	for _, post := range n.PostHandlers {
		post := post
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handlePost(post, ad) })
	}

	for _, email := range n.EmailHandlers {
		email := email
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleEmail(email, ad) })
	}
	if len(n.EmailHandlers) == 0 && (et.tm.SMTPService != nil && et.tm.SMTPService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleEmail(&pipeline.EmailHandler{}, ad) })
	}
	// If email has been configured globally only send state changes.
	if et.tm.SMTPService != nil && et.tm.SMTPService.Global() {
		n.IsStateChangesOnly = true
	}

	for _, exec := range n.ExecHandlers {
		exec := exec
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleExec(exec, ad) })
	}

	for _, log := range n.LogHandlers {
		log := log
		if !path.IsAbs(log.FilePath) {
			return nil, fmt.Errorf("alert log path must be absolute: %s is not absolute", log.FilePath)
		}
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleLog(log, ad) })
	}

	for _, vo := range n.VictorOpsHandlers {
		vo := vo
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleVictorOps(vo, ad) })
	}
	if len(n.VictorOpsHandlers) == 0 && (et.tm.VictorOpsService != nil && et.tm.VictorOpsService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleVictorOps(&pipeline.VictorOpsHandler{}, ad) })
	}

	for _, pd := range n.PagerDutyHandlers {
		pd := pd
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handlePagerDuty(pd, ad) })
	}
	if len(n.PagerDutyHandlers) == 0 && (et.tm.PagerDutyService != nil && et.tm.PagerDutyService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handlePagerDuty(&pipeline.PagerDutyHandler{}, ad) })
	}

	for _, sensu := range n.SensuHandlers {
		sensu := sensu
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleSensu(sensu, ad) })
	}

	for _, slack := range n.SlackHandlers {
		slack := slack
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleSlack(slack, ad) })
	}
	if len(n.SlackHandlers) == 0 && (et.tm.SlackService != nil && et.tm.SlackService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleSlack(&pipeline.SlackHandler{}, ad) })
	}
	// If slack has been configured globally only send state changes.
	if et.tm.SlackService != nil && et.tm.SlackService.Global() {
		n.IsStateChangesOnly = true
	}

	for _, hipchat := range n.HipChatHandlers {
		hipchat := hipchat
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleHipChat(hipchat, ad) })
	}
	if len(n.HipChatHandlers) == 0 && (et.tm.HipChatService != nil && et.tm.HipChatService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleHipChat(&pipeline.HipChatHandler{}, ad) })
	}
	// If HipChat has been configured globally only send state changes.
	if et.tm.HipChatService != nil && et.tm.HipChatService.Global() {
		n.IsStateChangesOnly = true
	}

	for _, alerta := range n.AlertaHandlers {
		// Validate alerta templates
		rtmpl, err := text.New("resource").Parse(alerta.Resource)
		if err != nil {
			return nil, err
		}
		gtmpl, err := text.New("group").Parse(alerta.Group)
		if err != nil {
			return nil, err
		}
		vtmpl, err := text.New("value").Parse(alerta.Value)
		if err != nil {
			return nil, err
		}
		ai := alertaHandler{
			AlertaHandler: alerta,
			resourceTmpl:  rtmpl,
			groupTmpl:     gtmpl,
			valueTmpl:     vtmpl,
		}
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleAlerta(ai, ad) })
	}

	for _, og := range n.OpsGenieHandlers {
		og := og
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleOpsGenie(og, ad) })
	}
	if len(n.OpsGenieHandlers) == 0 && (et.tm.OpsGenieService != nil && et.tm.OpsGenieService.Global()) {
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleOpsGenie(&pipeline.OpsGenieHandler{}, ad) })
	}

	for _, talk := range n.TalkHandlers {
		talk := talk
		an.handlers = append(an.handlers, func(ad *AlertData) { an.handleTalk(talk, ad) })
	}

	// Parse level expressions
	an.levels = make([]*tick.StatefulExpr, CritAlert+1)
	if n.Info != nil {
		an.levels[InfoAlert] = tick.NewStatefulExpr(n.Info)
	}
	if n.Warn != nil {
		an.levels[WarnAlert] = tick.NewStatefulExpr(n.Warn)
	}
	if n.Crit != nil {
		an.levels[CritAlert] = tick.NewStatefulExpr(n.Crit)
	}
	// Setup states
	if n.History < 2 {
		n.History = 2
	}
	an.states = make(map[models.GroupID]*alertState)

	// Configure flapping
	if n.UseFlapping {
		if n.FlapLow > 1 || n.FlapHigh > 1 {
			return nil, errors.New("alert flap thresholds are percentages and should be between 0 and 1")
		}
	}

	return
}