Graphite Click here for latest

Scale applications based on metrics in Graphite.

Availability: v2.5+ Maintainer: Community

Warning

You are currently viewing v"2.14" of the documentation and it is not the latest. For the most recent documentation, kindly click here.

Trigger Specification

This specification describes the graphite trigger that scales based on metrics in Graphite.

triggers:
- type: graphite
  metadata:
    # Required
    serverAddress: http://<graphite-host>:81
    query: stats.counters.http.hello-world.request.count.count # Note: query must return a vector/scalar single element response
    threshold: '10.5'
    activationThreshold: '5'
    queryTime: '-10Minutes' # Note: Query time in from argv Seconds/Minutes/Hours

Parameter list:

  • serverAddress - Address of Graphite
  • query - Query to run.
  • threshold - Target value to trigger scaling actions. (Default: 100, Optional, This value can be a float)
  • activationThreshold - Target value for activating the scaler. Learn more about activation here.(Default: 0, Optional, This value can be a float)
  • queryTime - Relative time range to execute query against. Please see the graphite API docs for more information.

Authentication Parameters

Graphite Scaler supports one type of authentication - basic authentication

Basic authentication:

  • authMode: It must contain basic in case of Basic Authentication. Specify this in trigger configuration.
  • username - This is a required field. Provide the username to be used for basic authentication.
  • password - Provide the password to be used for authentication. For convenience, this has been marked optional, because many applications implement basic auth with a username as apikey and password as empty.

Examples

apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: graphite-scaledobject
  namespace: default
spec:
  scaleTargetRef:
    name: my-deployment
  triggers:
  - type: graphite
    metadata:
      serverAddress: http://<graphite-host>:81
      threshold: '100'
      query: maxSeries(keepLastValue(reportd.*.gauge.detect.latest_max_time.value, 1))
      queryTime: '-1Minutes'

Here is an example of a Graphite Scaler with Basic Authentication, define the Secret and TriggerAuthentication as follows

apiVersion: v1
kind: Secret
metadata:
  name: keda-graphite-secret
  namespace: default
data:
  username: "dXNlcm5hbWUK" # Must be base64
  password: "cGFzc3dvcmQK"
---
apiVersion: keda.sh/v1alpha1
kind: TriggerAuthentication
metadata:
  name: keda-graphite-creds
  namespace: default
spec:
  secretTargetRef:
    - parameter: username
      name: keda-graphite-secret
      key: username
    - parameter: password
      name: keda-graphite-secret
      key: password
---
apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: graphite-scaledobject
  namespace: default
  labels:
    deploymentName: php-apache-graphite
spec:
  cooldownPeriod: 10
  maxReplicaCount: 5
  minReplicaCount: 0
  pollingInterval: 5
  scaleTargetRef:
    name: php-apache-graphite
  triggers:
  - type: graphite
    metadata:
      authMode: "basic"
      query: https_metric
      queryTime: -1Hours
      serverAddress: http://<graphite server>:81
      threshold: "100"
    authenticationRef:
        name: keda-graphite-creds