Kubernetes Horizontal Pod Autoscaling documentation

Fields

id

sources/serve-k8s-hpa-docs

URL

https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/

Publisher

Kubernetes

Kind

whitepaper

Accessed

2026-10-04

notes

HPA controller runs periodically (default 15s interval). Scales based on CPU/memory utilization or custom metrics. Uses ratio: desiredReplicas = ceil(currentReplicas * currentMetricValue / desiredMetricValue). For CPU, fetches from resource metrics API. Supports custom metrics via custom.metrics.k8s.io and external.metrics.k8s.io.

Notes

HPA controller runs periodically (default 15s interval). Scales based on CPU/memory utilization or custom metrics. Uses ratio: desiredReplicas = ceil(currentReplicas * currentMetricValue / desiredMetricValue). For CPU, fetches from resource metrics API. Supports custom metrics via custom.metrics.k8s.io and external.metrics.k8s.io.

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