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Scale applications based on InfluxDB queries

Availability: v2.1+ Maintainer: Community

Trigger Specification

This specification describes the influxdb trigger that scales based on the results of a InfluxDB query.

triggers:
  - type: influxdb
    metadata:
      serverURL: http://influxdb:8086
      organizationName: influx-org
      organizationNameFromEnv: INFLUXDB_ORG_NAME # Optional: You can use this instead of `organizationName` parameter. See details in "Parameter List" section
      thresholdValue: '4'
      query: |
        from(bucket: "bucket-of-interest")
        |> range(start: -12h)
        |> filter(fn: (r) => r._measurement == "stat")
      authToken: some-auth-token
      authTokenFromEnv: INFLUXDB_AUTH_TOKEN # Optional: You can use this instead of `authToken` parameter. See details in "Parameter List" section
      metricName: influx-metric # Optional: This value will default to a masked version of the url and organization name if not set by the user (metrics name value would be then `influxdb-https---xxx-influx_org`)

Parameter list:

  • authToken - Authentication token needed for the InfluxDB client to communicate with an associated server.
  • authTokenFromEnv - Defines the authorization token, similar to authToken, but reads it from an environment variable on the scale target.
  • organizationName - Organization name needed for the client to locate all information contained in that organization such as buckets, tasks, etc.
  • organizationNameFromEnv - Defines the organization name, similar to organizationName, but reads it from an environment variable on the scale target.
  • serverURL - Holds the url value of the InfluxDB server.
  • thresholdValue - Provided by the user. This value can vary from use case to use case depending on the data of interest, and is needed to trigger the scaling in/out depending on what value comes back from the query.
  • query - Flux query that will yield the value for the scaler to compare the thresholdValue against.
  • metricName - Name to assign to the metric. If not set KEDA will generate a name based on masked version of the server url and organization name. If using more than one trigger it is required that all metricName(s) be unique. (Optional)

Authentication Parameters

You can authenticate by using an authorization token.

Authorization Token Authentication:

  • authToken - Authorization token for InfluxDB server.

Example

Below is an example of how to deploy a scaled object with the InfluxDB scale trigger.

apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: influxdb-scaledobject
  namespace: my-project
spec:
  scaleTargetRef:
    name: nginx-worker
  triggers:
    - type: influxdb
      metadata:
        serverURL: http://influxdb:8086
        organizationNameFromEnv: INFLUXDB_ORG_NAME
        thresholdValue: '4'
        query: |
          from(bucket: "bucket-of-interest")
          |> range(start: -12h)
          |> filter(fn: (r) => r._measurement == "stat")
        authTokenFromEnv: INFLUXDB_AUTH_TOKEN


Currently available scalers for KEDA