Kubernetes v1.21.3 releases, container cluster management system

Kubernetes is an open-source system for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications.

Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.

Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically scheduled, and micro-services-oriented, consider joining the CNCF. For details about who’s involved and how Kubernetes plays a role, read the CNCF announcement.

Changelog v1.21.3

Feature

• Kubernetes is now built with Golang 1.16.6 (#103670, @cpanato) [SIG Cloud Provider, Instrumentation, Release and Testing]
• Updates the following images to pick up CVE fixes:
  • debian to v1.8.0
  • debian-iptables to v1.6.5
  • setcap to v2.0.3 (#103235, @thejoycekung) [SIG API Machinery, Release and Testing]

Bug or Regression

• Fix scoring for NodeResourcesMostAllocated and NodeResourcesBalancedAllocation plugins when nodes have containers with no requests. This was leaving to under-utilization of small nodes. (#102925, @alculquicondor) [SIG Scheduling]
• ServiceOwnsFrontendIP shouldn’t report error when the public IP doesn’t match (#102516, @nilo19) [SIG Cloud Provider]
• Switch scheduler to generate the merge patch on pod status instead of the full pod (#103133, @marwanad) [SIG Scheduling]
• VSphere: Fix regression during attach disk if datastore is within a storage folder or datastore cluster. (#102969, @gnufied) [SIG Cloud Provider]

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