Move K8s Stateful Pods Between Nodes

Move K8s Stateful Pods Between Nodes

Author: Bret Fisher October 9, 2025 Duration: 46:59

Bret is joined by Philip Andrews and Dan Muret of Cast AI to discuss pod live migration between nodes in a Kubernetes cluster.

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Cast AI dynamically moves your pod to a different node without downtime or data lost. It copies your running pod data, memory, IP address, and TCP connections from one node to another in real time.

In this episode, we nerd out over how Cast AI works under the hood, use cases for it, including hardware and OS maintenance on a node. I've got a feeling Cast AI has a winning feature on their hands.

★Show Links★
Cast AI website
Cast AI YouTube Channel

Check out the video podcast version here: https://youtu.be/yINNWxRywv4

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  • (00:00) - Introduction
  • (02:21) - Cast AI Elevator Pitch
  • (07:37) - Stateful Workloads
  • (10:43) - Bin Packing in Live Migration
  • (14:15) - Stateful vs Stateless
  • (16:23) - Networking and Storage Considerations
  • (23:43) - Future Developments and Use Cases
  • (26:23) - ML Workloads
  • (29:05) - Live Migration of Spot Instances
  • (31:41) - Live Migration Process Explained
  • (39:42) - Challenges and Engineering Behind Live Migration
  • (44:36) - Getting Started with Cast AI

Bret Fisher hosts DevOps and Docker Talk: Cloud Native Interviews and Tooling alongside Nirmal Mehta, pulling conversations directly from their live audience sessions. This isn't a theoretical lecture series; it's grounded in the practical, often messy realities of building and running modern systems. Each episode digs into the specific tools and philosophies shaping infrastructure today, from the foundational elements like Docker and container orchestration with Kubernetes or Swarm to the broader cultural shifts of DevOps, SRE, and platform engineering. You'll hear discussions that span the entire software lifecycle, touching on the integration of security with DevSecOps, the automation promises of GitOps, and what "Cloud Native" truly means for development teams. The dialogue stays focused on actionable insights and real-world use cases, offering a genuine sense of what works and what doesn't in the field. For anyone navigating the container and cloud ecosystem, this podcast serves as a regular, insightful check-in with practitioners and experts, hosted by someone deeply embedded in the community. The natural, interview-driven format makes complex topics accessible, ensuring listeners come away with more than just buzzwords-they get context and clarity.
Author: Language: English Episodes: 100

DevOps and Docker Talk: Cloud Native Interviews and Tooling
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