Horizontal Pod Autoscaling can help you scale your app based on CPU, memory or custom metrics in Kubernetes.
The Horizontal Pod Autoscaler automatically scales the number of pods in a replication controller, deployment or replica set based on observed CPU utilization (or, with custom metrics support, on some other application-provided metrics).
For more info on HPA, visit https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/