What's new in Kubernetes 1.20?

Kubernetes 1.20 introduces significant enhancements, with 43 new features, including 11 graduating to stable, 15 new additions, and 17 improvements to existing functionalities, reflecting a trend towards stabilization and deprecation of older features. Noteworthy updates include the stabilization of long-standing features like CronJobs and Kubelet CRI support, as well as the introduction of security-focused improvements such as Kubernetes system component log sanitization and the CSIServiceAccountToken enhancement, which strengthens authentication and token management. The release also emphasizes user-friendly changes like efficient kube-apiserver operations in high-availability clusters and graceful node shutdowns to improve resource management during upgrades. Additionally, Kubernetes 1.20 showcases advancements in storage through enhanced volume snapshot capabilities and the introduction of default value markers for custom resource definitions. Other important changes include network protocol flexibility, improved API server request prioritization, and features like the RuntimeClass, which supports multiple container runtimes. This release highlights the ongoing effort to boost security, stability, and user experience within Kubernetes.