The eval node replaces all fields with the computed fields unless the
`keep` property is used. Simply add `.keep()` or `.keep('val', 'value')` to
the eval node to tell it to keep those specific fields.
On Friday, October 28, 2016 at 12:22:36 AM UTC-6,
vipul....@traveltriangle.com wrote:
>
> hi all
> I have written the following tick script
>
>
> stream
> |from()
> .database('tech')
> .retentionPolicy('autogen')
> .measurement('passenger_queue')
> |log()
> |eval(
> lambda: if("host" == '172.30.2.198','true','false')
> )
> .as('val')
> |alert()
> .id('kapacitor passenger_queues alert')
> .message('{{ .Level }} {{ .ID }} /{{ index .Tags "host" }} has a
> queue length :{{ index .Fields "value" }}')
> .info(lambda: "value" > 50)
> .warn(lambda: "value" > 70)
> .crit(lambda: "value" > 80)
> .stateChangesOnly()
> .email()
> |log()
>
>
>
>
> on enbaling the script I get the following results in kapacitor show I GET
> THE FOLLOWING RESULT :
>
>
>
> DOT:
> digraph pass_alert {
> graph [throughput="0.00 points/s"];
>
> stream0 [avg_exec_time_ns="0" ];
> stream0 -> from1 [processed="160"];
>
> from1 [avg_exec_time_ns="2.856µs" ];
> from1 -> log2 [processed="160"];
>
> log2 [avg_exec_time_ns="0" ];
> log2 -> eval3 [processed="160"];
>
> eval3 [avg_exec_time_ns="550.728µs" eval_errors="0" ];
> eval3 -> alert4 [processed="160"];
>
> alert4 [alerts_triggered="0" avg_exec_time_ns="101.577µs"
> crits_triggered="0" infos_triggered="0" oks_triggered="0"
> warns_triggered="0" ];
> alert4 -> log5 [processed="0"];
>
> log5 [avg_exec_time_ns="0" ];
> }
>
> THE PROBLEM IS THAT alerts_triggered are coming 0 while avg exec time is
> non zero
> as soon I as I remove the eval statement aleerts triggered start coming
>
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