monitor.deadman() function
The monitor.deadman()
function detects when a group stops reporting data. It takes a stream of tables and reports if groups have been observed since time t
.
*Function type: Transformation*
import "influxdata/influxdb/monitor"
monitor.deadman(t: 2019-08-30T12:30:00Z)
monitor.deadman()
retains the most recent row from each input table and adds a dead
column. If a record appears after time t
, monitor.deadman()
sets dead
to false
. Otherwise, dead
is set to true
.
Parameters
t
The time threshold for the deadman check.
*Data type: Time*
Examples
Detect if a host hasn’t reported in the last five minutes
import "influxdata/influxdb/monitor"
import "experimental"
from(bucket: "example-bucket")
|> range(start: -10m)
|> group(columns: ["host"])
|> monitor.deadman(t: experimental.subDuration(d: 5m, from: now() ))