How To Handle Node Shutdown In Kubernetes - Xing Yang & Ashutosh Kumar, VMware

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How To Handle Node Shutdown In Kubernetes - Xing Yang & Ashutosh Kumar, VMware

Speakers: Ashutosh Kumar, Xing Yang
Shutting down of a node is an inevitable event and it can be graceful or non graceful in a Kubernetes cluster. A node shutdown can be graceful only if it can be detected by the Kubelet ahead of the actual shutdown. A node shutdown may not be detected by the Kubelet due to a variety of reasons causing the shutdown to be non graceful. In the talk, Xing and Ashutosh will explain the graceful shutdown concepts and its impact on the running workloads including the systemd inhibitor locks mechanism and configuration settings. In Kubernetes v1.24, alpha support for handling non graceful shutdown is introduced which enables replacement pods for StatefulSets to be created successfully on a different running node which otherwise would be stuck. The talk will explain how to use the non graceful shutdown feature using taints and the future roadmap around making the feature more automated.