ChangeDetectNode (Kapacitor TICKscript 节点)

stream
	|from().measurement('packets')
	|changeDetect('field_a','field_b')

changeDetect.quiet()

changeDetect|alert()

changeDetect|barrier()

changeDetect|bottom(num int64, field string, fieldsAndTags ...string)

changeDetect|changeDetect(field string)

changeDetect|combine(expressions ...ast.LambdaNode)

changeDetect|count(field string)

changeDetect|cumulativeSum(field string)

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    data
        |deadman(100.0, 10s)
    //Do normal processing of data
    data...

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    data
        |stats(10s)
            .align()
        |derivative('emitted')
            .unit(10s)
            .nonNegative()
        |alert()
            .id('node \'stream0\' in task \'{{ .TaskName }}\'')
            .message('{{ .ID }} is {{ if eq .Level "OK" }}alive{{ else }}dead{{ end }}: {{ index .Fields "emitted" | printf "%0.3f" }} points/10s.')
            .crit(lambda: "emitted" <= 100.0)
    //Do normal processing of data
    data...

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    data
        |deadman(100.0, 10s)
            .slack()
            .channel('#dead_tasks')
    //Do normal processing of data
    data...

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    // Only trigger the alert if the time of day is between 8am-5pm.
    data
        |deadman(100.0, 10s, lambda: hour("time") >= 8 AND hour("time") <= 17)
    //Do normal processing of data
    data...

changeDetect|deadman(threshold float64, interval time.Duration, expr ...ast.LambdaNode)

changeDetect|default()

changeDetect|delete()

changeDetect|derivative(field string)

changeDetect|difference(field string)

changeDetect|distinct(field string)

changeDetect|ec2Autoscale()

changeDetect|elapsed(field string, unit time.Duration)

changeDetect|eval(expressions ...ast.LambdaNode)

changeDetect|first(field string)

changeDetect|flatten()

    |groupBy(*)

changeDetect|groupBy(tag ...interface{})

changeDetect|holtWinters(field string, h int64, m int64, interval time.Duration)

changeDetect|holtWintersWithFit(field string, h int64, m int64, interval time.Duration)

changeDetect|httpOut(endpoint string)

changeDetect|httpPost(url ...string)

changeDetect|influxDBOut()

changeDetect|join(others ...Node)

changeDetect|k8sAutoscale()

changeDetect|kapacitorLoopback()

changeDetect|last(field string)

changeDetect|log()

changeDetect|max(field string)

changeDetect|mean(field string)

changeDetect|median(field string)

changeDetect|min(field string)

changeDetect|mode(field string)

changeDetect|movingAverage(field string, window int64)

changeDetect|percentile(field string, percentile float64)

changeDetect|sample(rate interface{})

changeDetect|shift(shift time.Duration)

changeDetect|sideload()

changeDetect|spread(field string)

changeDetect|stateCount(expression ast.LambdaNode)

changeDetect|stateDuration(expression ast.LambdaNode)

changeDetect|stats(interval time.Duration)

changeDetect|stddev(field string)

changeDetect|sum(field string)

changeDetect|swarmAutoscale()

changeDetect|top(num int64, field string, fieldsAndTags ...string)

changeDetect|trickle()

changeDetect|union(node ...Node)

changeDetect|where(expression ast.LambdaNode)

changeDetect|window()