5 articles tagged with Autoscaling.
The HorizontalPodAutoscaler is up, traffic is spiking, and replicas won't move. Seven causes in the order we check them, each with the command that confirms it.
Sixty-seven enhancements shipped on August 26, but only a handful change how you run clusters. Scale-to-zero autoscaling, rootless kubelet, and a GA metrics API are the ones to read.
Node upgrades, autoscaler scale-downs, and spot reclaims all drain nodes. Without PDBs they can take all your replicas at once. The budgets, probes, and graceful-shutdown handling that keep voluntary disruptions invisible to users.
Bad resource requests waste money or trigger OOMs. The methodology we use to right-size requests based on actual usage, and the gotchas the autoscalers don't fix.
After two years of running Karpenter on production EKS clusters, the NodePool patterns that survived, the ones we replaced, and the tuning that matters.
