KubeCon + CloudNativeCon Japan 2025: Full Schedule

16-17 June
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Please note: This schedule is automatically displayed in Japan Standard Time (UTC+9:00). To see the schedule in your preferred timezone, please select from the drop-down menu to the right, above "Filter by Date." The schedule is subject to change and session seating is available on a first-come, first-served basis.

16:30 JST

Breaking Limits: Highly-Isolated and Low-Overhead Wasm Container - Soichiro Ueda, Kyoto University & Ai Nozaki, The University of Tokyo

Monday June 16, 2025 16:30 - 17:00 JST

Level 1 | Pegasus B2-C

Wasm is touted as the next generation of containers, offering a smaller, more secure, and more portable application format. However, challenges remain, particularly in achieving enough isolation for public clouds where multi-tenancy exists. This is because Wasm shares the host kernel between workloads like containers. To take full advantage of Wasm, there is still insufficient discussion on this problem.

To address the issue, we've developed a new Wasm runtime, Mewz. It runs a single Wasm module within a dedicated VM while also having a lightweight and specialized kernel (unikernel). This revolutionary execution model enables more secure and low-overhead Wasm containers. We've open-sourced the implementation, and Mewz is listed in the CNCF cloud native landscape! In this session, we'll explain the architecture of Mewz and why it's more isolated and low-overhead than ordinary Wasm runtimes. Building on this presentation, let’s discuss the future of cloud workloads powered by Wasm!

Speakers

Ai Nozaki

Master Student, The University of Tokyo

Ai Nozaki is a Master's student at The University of Tokyo. She is a member of Mewz project. Her interest lies in WebAssembly, systems softwares and GPUs.

Soichiro Ueda

Student, Kyoto University

Master's Student in Computer Science at Kyoto University. Working on the Mewz project. Love cloud-native technologies and system software.

Monday June 16, 2025 16:30 - 17:00 JST
Level 1 | Pegasus B2-C

Emerging + Advanced

Content Experience Level Intermediate
Presentation Language English

17:10 JST

2-Node Kubernetes: A Reliable and Compatible Solution - Xin Zhang & Guang Hu, Microsoft

Monday June 16, 2025 17:10 - 17:40 JST

Level 1 | Pegasus B2-C

High availability in Kubernetes typically requires a 3-node setup to support etcd's Raft algorithm. But what if you could achieve HA with only 2 nodes, slashing infrastructure costs by over 30% without sacrificing reliability? This is a game-changer, especially for deployments in retail and manufacturing scaling across hundreds or thousands of locations.
Join us to explore a groundbreaking 2-node HA Kubernetes solution, built by evolving the Raft algorithm for etcd. Unlike alternatives that compromise on compatibility, our approach delivers etcd-based HA, which can tolerate both node failures and network partitioning like a traditional 3-node cluster. You can seamlessly transit between 3-node and 2-node cluster utilizing standard tools like kubeadm or CAPI. This approach requires only a simple shared storage witness.
In this session, we will unpack the mechanics of this innovation, demonstrate 2-node cluster provisioning, and showcase its resilience under real-world failure scenarios.

Speakers

Guang Hu

Principal Product Manager, Microsoft

Guang Hu is a Principal Program Manager at Microsoft, where they lead strategic initiatives to enhance digital transformation and customer engagement. Guang has been instrumental in driving and contributing in bring Kubernetes for edge scenarios that leverage cloud-native solutions... Read More →

Xin Zhang

Principal Software Engineer, Microsoft

Joshua is a Principal Software Engineer at Microsoft, working on cutting-edge edge computing solutions. With over a decade of experience in Azure hybrid cloud services, he’s passionate about designing, implementing, and optimizing core algorithms to bring powerful capabilities to... Read More →

Monday June 16, 2025 17:10 - 17:40 JST
Level 1 | Pegasus B2-C

Emerging + Advanced

Content Experience Level Any
Presentation Language English