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Configure Autoscaling

Note

This feature is available from Harness Helm Chart version 0.23.0.

By default, autoscaling is enabled for all services in Harness Helm Chart now.

You can set up autoscaling for harness workloads using HorizontalPodAutoscaler. Harness helm chart supports configuring HPA for either all services at once or for selective services.

Configure autoscaling for all services​

You can configure autoscaling for all services using the global override of helm chart.

global:
  autoscaling:
    enabled: true      # Enables autoscaling for all services
    minReplicas: 1     # Set minimum replicas for all services
    maxReplicas: 5     # Set maximum replicas for all services
    targetCPU: 80      # Set target CPU for all services
    targetMemory: 80   # Set target Memory for all services

Configure autoscaling for selective services​

If you want to change the autoscaling spec such as minReplicas for selective services, you can configure it like below.

global:
  autoscaling:
    enabled: true      # Disables autoscaling for all services
    minReplicas: 1     # Set minimum replicas for all services
    maxReplicas: 5     # Set maximum replicas for all services
    targetCPU: 80      # Set target CPU for all services
    targetMemory: 80   # Set target Memory for all services

platform:
  ng-manager:
    autoscaling:
      minReplicas: 3   # Takes precedence over global minReplicas

The same applies for other spec fields maxReplicas, targetCPU and targetMemory.

Configure autoscaling behaviour of selective services​

You can set autoscaling behaviour of services through their individual overrides. For eg., to set the scaleDown policy of ng-manager, you can configure it like below.

platform:
  ng-manager:
    autoscaling:
      behavior:
        scaleDown:
          policies:
          - type: Pods
            value: 4
            periodSeconds: 60
          - type: Percent
            value: 10
            periodSeconds: 60

To learn more about the HPA behavior, you can refer to its Official Documentation