NATS Streaming Click here for latest

Scale applications based on NATS Streaming.

Availability: v1.0+ Maintainer: Community

Trigger Specification

This specification describes the stan trigger for NATS Streaming.

triggers:
- type: stan
  metadata:
    natsServerMonitoringEndpoint: "stan-nats-ss.stan.svc.cluster.local:8222"
    queueGroup: "grp1"
    durableName: "ImDurable"
    subject: "Test"
    lagThreshold: "10"

Parameter list:

  • natsServerMonitoringEndpoint - Location of the Nats Streaming monitoring endpoint.
  • queueGroup - Name of queue group of the subscribers
  • durableName - Name of durability used by subscribers
  • subject - Name of the channel
  • lagThreshold - Average target value to trigger scaling actions.

Authentication Parameters

Not supported yet.

Example

apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: stan-scaledobject
  namespace: gonuts
spec:
  pollingInterval: 10   # Optional. Default: 30 seconds
  cooldownPeriod: 30   # Optional. Default: 300 seconds
  minReplicaCount: 0   # Optional. Default: 0
  maxReplicaCount: 30  # Optional. Default: 100  
  scaleTargetRef:
    name: gonuts-sub
  triggers:
  - type: stan
    metadata:
      natsServerMonitoringEndpoint: "stan-nats-ss.stan.svc.cluster.local:8222"
      queueGroup: "grp1"
      durableName: "ImDurable"
      subject: "Test"
      lagThreshold: "10"


Currently available scalers for KEDA