Horizontal Pod Autoscaler

The Horizontal Pod Autoscaler (HPA) is a native Kubernetes controller that automatically increases or decreases the number of running Pods in a Deployment, ReplicaSet, StatefulSet, or other scalable resource so that observed resource consumption stays close to a user-defined target. It polls the Kubernetes Metrics Server (or a custom/external metrics API) at a regular interval, compares CPU, memory, or arbitrary custom metrics against the specified thresholds, and then adjusts the spec.replicas field of the target workload accordingly. This enables applications to meet fluctuating demand without manual intervention or unnecessary over-provisioning, while still preventing sudden traffic spikes from overwhelming the cluster. You can read the full upstream specification in the official Kubernetes documentation: https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/.

Terrafrom Mappings:

• kubernetes_horizontal_pod_autoscaler_v2.metadata[0].name

Supported Methods

• GET: Get a Horizontal Pod Autoscaler by name
• LIST: List all Horizontal Pod Autoscalers
• SEARCH: Search for a Horizontal Pod Autoscaler using the ListOptions JSON format e.g. {"labelSelector": "app=wordpress"}