Kubernetes 1.15 Release Highlights: API Extensions, Admission Webhooks, CSI Improvements, and Cluster Lifecycle Enhancements
The Kubernetes 1.15 release introduces 25 enhancements—including stable, beta, and alpha features—focused on sustainability, API extensibility, admission webhook improvements, cluster lifecycle stability, CSI storage advances, and deprecations, providing a comprehensive overview of the new capabilities and updates.
Last week Kubernetes 1.15 was released, the second 2019 release, containing 25 enhancements (2 stable, 13 beta, 10 alpha) focused on sustainability and scalability.
Core API extensibility – Improvements to CustomResourceDefinitions (CRDs) include structural schema enforcement, webhook conversion, OpenAPI publishing, field pruning, and defaulting, with several features promoted to beta or alpha.
Admission webhook enhancements – Re‑invocation policy, improved mutation ordering, and object selector filtering are introduced to make webhooks more reliable and idempotent.
Cluster lifecycle stability – kubeadm gains high‑availability support, certificate rotation, upgraded config API version, and a new test suite; CSI storage advances with volume cloning and other alpha features.
Additional updates include Go module support in the core, migration of cloud provider code, enhanced kubectl get/describe, third‑party node monitoring plugins, a new alpha scheduler framework, ExecutionHook API, and deprecation of legacy APIs.
For full release notes, download links and tutorials see the provided references.
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