Session

Taming the Starship Kraken: Zero-Downtime Vertical Scaling with Kubernetes 1.33

Juggling CPU and memory allocations for stateful services used to feel like taming a zero-gravity kraken aboard a starship - one tentacle-slip and the whole mission derails. Kubernetes 1.33’s In-Place Pod Vertical Scaling transforms that chaos into a choreographed ballet: you patch your Pod’s resources and the kubelet morphs cgroups on the fly - no eviction, no restart. With the resize subresource and mutable resource fields, platform teams amp up CPU and RAM for heavy inference bursts or dial them back to reclaim idle capacity.

In our tests, we banished 100% of pod restarts for vertical changes, slashed over-provisioned memory by 30%, and achieved sub-500 ms resize operations under warp-speed load. One API call, zero disruptions - warm caches stay toasty like a dragon’s hoard, persistent connections hum like hyperspace drives, and SLOs glow green in the control panel. It’s resource orchestration without risk: a sleek starship crew, not a space circus.

Prashant Ramhit

Mirantis Inc. Platform Engineer | Snr DevOps Advocate | OpenSource Dev

Dubai, United Arab Emirates

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