HPA and VPA thrashing
An internal API runs on Kubernetes with both a HorizontalPodAutoscaler (target 60% CPU, 4-30 pods) and a VerticalPodAutoscaler in `Auto` mode that resizes pod CPU/memory requests. Since both were enabled last week, the deployment thrashes: pods are evicted and recreated every few minutes, replica count swings, and p99 has a jagged saw-tooth. `kubectl get events` is full of VPA evictions and HPA scale events interleaved. Each control loop on its own looked fine in staging. How do you triage and stabilize this?
What a strong answer looks like
Stop the bleeding first (mitigate), then form hypotheses from real signals. Separate root cause from symptom, communicate status as you go, and close with what prevents a repeat.
0:00 of about 30 min
Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.
Run or narrate your approach, then ask the coach.