KubeHpaMaxedOut #

Meaning #

Horizontal Pod Autoscaler has been running at max replicas for longer than 15 minutes.

Impact #

Horizontal Pod Autoscaler won’t be able to add new pods and thus scale application. Notice for some services maximizing HPA is in fact desired.

Diagnosis #

Check why HPA was unable to scale:

• max replicas too low
• too low value for requests such as CPU?

Mitigation #

If using basic metrics like CPU/Memory then ensure to set proper values for requests. For memory based scaling ensure there are no memory leaks. If using custom metrics then fine-tune how app scales accordingly to it.

Use performance tests to see how the app scales.