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For most of Kubernetes history, the edge of the cluster was always a hard boundary that was difficult to traverse. Single clusters can scale up with huge node pools and extensive geographic coverage; but many users prefer to use multiple Kubernetes clusters. This gives them more control, with isolated workloads, manageable latency, and clear data jurisdictions, reducing the effort to provide reliable platforms. However that isolation requires a lot of work to access services from one cluster in another. By using the Multicluster Services API, an OSS standard sponsored by SIG-Multicluster, users with an application spread across multiple clusters can make services available between them using simple Kubernetes object primitives available as CRDs, without needing to install a full service mesh. In this talk, we will explain the concepts and architecture behind the MCS API and walk through demos on Submariner.io and GKE, the two current implementations of the MCS API.
Stephen is one of the maintainers of the Submariner project. He is a long-time open source contributor, and has been at Red Hat since 2015, working on OpenDaylight and Submariner.
Laura Lorenz is a software engineer at Google working on the multicluster experience on GKE. She is an active member of Kubernetes’ special interest group SIG-Multicluster, and a subproject owner for the MCS API.
