NATS Streaming

Scale applications based on NATS Streaming.

Availability: v1.0+ Maintainer: Community

Notice

This page does not exist in the latest version (2.19). It may have been deprecated or replaced. Check the 2.19 documentation for alternatives.

Trigger Specification

This specification describes the stan trigger for NATS Streaming.

triggers:
- type: stan
  metadata:
    natsServerMonitoringEndpoint: "stan-nats-ss.stan.svc.cluster.local:8222" # Location of the Nats Streaming monitoring endpoint
    queueGroup: "grp1" # Queue group name of the subscribers
    durableName: "ImDurable" # Must identify the durability name used by the subscribers
    subject: "Test" # Name of channel
    lagThreshold: "10" # Configures the TargetAverageValue on the Horizontal Pod Autoscaler (HPA)).

Authentication Parameters

Not supported yet.

Example

apiVersion: keda.k8s.io/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:
    deploymentName: gonuts-sub
  triggers:
  - type: stan
    metadata:
      natsServerMonitoringEndpoint: "stan-nats-ss.stan.svc.cluster.local:8222"
      queueGroup: "grp1"
      durableName: "ImDurable"
      subject: "Test"
      lagThreshold: "10"