Kubernetes changelog

Kubernetes changelog is available in: https://github.com/kubernetes/kubernetes/tree/master/CHANGELOG

Kubernetes is released 4 times per year approximately every 3 months.

2024

v1.31, Aug

1.31 Changelog, announcement

• AppArmor support is now stable
• Improved ingress connectivity reliability for kube-proxy
• Persistent Volume last phase transition time

Beta:

• nftables backend for kube-proxy

Alpha:

• allow using an OCI image as a volume in a Pod

v1.30, Apr

• 1.30 Changelog
  • trafficDistribution added to kind: Service
  • SuccessPolicy in Jobs
  • managedBy in Jobs
  • RelaxedEnvironmentVariableValidation
  • CustomResourceFieldSelectors
  • Support for configuring multiple JWT authenticators in Structured Authentication Configuration
  • AppArmor profiles can now be configured through fields on the PodSecurityContext and container SecurityContext
  • Conflicting issuers between JWT authenticators and service account config are now detected and fail on API server startup.

2023

v1.29, Dec

• 1.29 (Dec 2023) Changelog, announcemnt
  • ReadWriteOncePod PersistentVolume access mode
  • Volume expansion using Secrets supported for CSI drivers
  • KMS v2 encryption at rest generally available
  • Beta
    • Node lifecycle separated from taint management
    • Clean up for legacy Secret-based ServiceAccount tokens
  • Alpha
    • Define Pod affinity or anti-affinity using matchLabelKeys
    • nftables backend for kube-proxy
    • APIs to manage IP address ranges for Services
    • Add support to containerd/kubelet/CRI to support image pull per runtime class
    • In-place updates for Pod resources, for Windows Pods
  • Stable
    • Remove transient node predicates from KCCM's service controller
    • Reserve nodeport ranges for dynamic and static allocation
    • Priority and Fairness for API Server Requests
    • KMS v2 Improvements
    • Support paged LIST queries from the Kubernetes API
    • ReadWriteOncePod PersistentVolume Access Mode
    • Kubernetes Component Health SLIs
    • CRD Validation Expression Language
    • Introduce nodeExpandSecret in CSI PV source
    • Track Ready Pods in Job status
    • Kubelet Resource Metrics Endpoint

v1.28, Aug

• 1.28 (Aug 2023) announcement, changelog
  • kubectl events
  • TerminationGracePeriodSeconds
  • Changes to supported skew between control plane and node versions
  • Recovery from non-graceful node shutdown
  • Improvements to CustomResourceDefinition validation rules
  • ValidatingAdmissionPolicies graduate to beta
  • Match conditions for admission webhooks
  • PodReplacementPolicy
  • Beta support for enabling swap space on Linux
  • Mixed version proxy (alpha)
  • Support for CDI injection into containers (alpha)
  • API awareness of sidecar containers (alpha)
  • Automatic, retroactive assignment of a default StorageClass
  • Pod replacement policy for Jobs (alpha)
  • Job retry backoff limit, per index (alpha)

v1.27, Apr

• 1.27 (Apr 2023) announcement changelog
  • --seccomp-default
  • suspend field
  • schedulingGates
  • NodeLogQuery
  • ReadWriteOncePod
  • matchLabelKeys
  • SELinuxMount added to CSIDriver
  • Add gRPC probe to Pod.Spec.Container.{Liveness,Readiness,Startup} Probe

2022

1.26

• 1.26 Dec 2022 https://kubernetes.io/blog/2022/12/09/kubernetes-v1-26-release/ - Apr 2023 EKS supported
  • registry.k8s.io vs k8s.gcr.io
  • Storage improvements
  • Improvements to Kubernetes metrics
  • Health Service Level Indicators
  • PodSchedulingReadiness

1.25

• 1.25 Aug 2022 Combiner Changelog, announcement (CKA v1.25)
  • Read https://cloud.google.com/blog/products/containers-kubernetes/kubectl-auth-changes-in-gke regarding gke-gcloud-auth-plugin
  • Added sum feature to kubectl top pod
  • kubectl rollout status multiple resources
  • kubectl diff changed to ignore managed fields by default
  • kubectl kustomize upgraded functionality
  • Improved kubectl run and kubectl debug error message
  • cgroups v2
  • Distroless
  • PodSecurityPolicy deprecated and replace by Pod Security Admission (PSA)

Note: Karpenter add support for this version on Jan 2023

1.24

• 1.24 May 2022 announcement Changelog (CKA v1.24)
  • dockershim removed from kubelet
  • Beta APIs off by default
  • Release artifacts are signed using cosign signatures
  • OpenAPI v3 beta support
  • Storage Capacity and Volume Expansion are Generally Available
  • NonPreemptingPriority
  • CSR Duration: Extend the CertificateSigningRequest API with a mechanism to allow clients to request a specific duration for the issued certificate.

2021

• 1.23 Dec 2021 announcement (EKS 1.23 deprecated since Oct 2023)
  • HorizontalPodAutoscaler v2 GA, HPA API to GA
  • EKS: CSI migration from in-tree storage to plugins: kubernetes.io/gce-pd or kubernetes.io/aws-ebs. If you have pods running on a version 1.22 or earlier cluster, then you must install the Amazon EBS driver before updating your cluster to version 1.23 to avoid service interruption.
  • [SECURITY] Defend Against Logging Secrets via Static Analysis
  • FlexVolume is deprecated

• 1.22 Aug 2021 announcement
  • kubectl apply --server-side
  • etcd upgraded to 3.5.0
  • kubernetes.io/ingress.class deprecated

• 1.21 April 2021 announcement, Changelog
  • CronJobs stable
  • EndpointSlice stable
  • sysctl support
  • PodDisruptionBudget (PDB)
  • Graceful node shutdown
  • Newly provisioned PVs by gce-pd will no longer have the beta FailureDomain label. gce-pd volume plugin will start to have GA topology label instead. (#98700, @Jiawei0227) [SIG Cloud Provider, Storage and Testing]

2020

1.20

• 1.20 Dec 2020 https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.20.md (announcement)
  • Volume Snapshot

1.19

• 1.19 Aug 2020 https://kubernetes.io/blog/2020/08/26/kubernetes-release-1.19-accentuate-the-paw-sitive/
  • https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.19.md
    • Increased support from 9 months to 1 year
    • Ingress API GA

1.18

• 1.18 (March 2020)
  • https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.18.md
  • Announcement: https://kubernetes.io/blog/2020/03/25/kubernetes-1-18-release-announcement/
    • New Ingress pathType resources: Exact, Prefix
    • Introduced kubectl diff and kubectl debug
    • PVC cloning
    • Graduate NodeLocal DNSCache to GA
    • New EndpointSlice API
    • New CertificateSigningRequest (CSR) API
    • Beta Kubernetes Topology Manager
    • ingressClassName introduced to deprecate kubernetes.io/ingress.class annotation

2019

• 1.17, Dec 09, 2019 announcement (Red Hat OpenShift 4.4)
  • https://kubernetes.io/docs/setup/release/notes/#v1-17-0
  • https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.17.md

• 1.16, Sep 18, 2019 announcement
  • https://kubernetes.io/docs/setup/release/notes/#v1-16-0
  • https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.16.md
    • EndpointSlice API (beta)

• 1.15, June 19, 2019 announcement
  • https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.15.md#kubernetes-v115-release-notes, ** https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.15.md

• 1.14 (25 March 2019)

2018

• 1.13 (03/Dec/2018) :
  • Container Storage Interface (CSI) GA
  • kubeadm GA
  • CoreDNS default DNS Server (was first introduced in version 1.09)

• 1.12 (27/Sep/2018): https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.12.md

• 1.11 (27/Jun/2018): https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.11.md, (Announcement)
  • Support for online resizing of Persistent Volumes has been introduced as an alpha feature

• 1.10 (26/March/2018): https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.10.md, (Announcement)

2017

• 1.9 (Dec 2017), announcement
  • https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.9.md
    • Workloads API GA, it groups the DaemonSet, Deployment, ReplicaSet, and StatefulSet APIs

• 1.8 Sep 2017 - announcement, Changelog
  • Role based access control (RBAC) to stable

• 1.7

• 1.6 (March 2017) https://www.mirantis.com/blog/whats-new-kubernetes-1-6-focus-stability/
  • Role-Based Access Control (RBAC)

2016

• 1.4 https://kubernetes.io/blog/2016/09/kubernetes-1-4-making-it-easy-to-run-on-kuberentes-anywhere/
  • Pod Disruption Budget introduced as alpha

Older releases

• Release 1.2: https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.2.md#v120
• Release 1.1:
  • Feature: any container in a pod can enable privileged mode

2015

• 1.0 July 2015

Related

• kubectl version or kubectl version --short=true
• kubeadm version
• kubeadm upgrade
• AWS EKS: https://docs.aws.amazon.com/eks/latest/userguide/kubernetes-versions.html
• EKS version
• Rancher version

See also

• The History of Kubernetes: https://blog.risingstack.com/the-history-of-kubernetes/
• Kubernetes changelog, CKA
• Software changelogs, git log, GA, EoL, EOS, release cycle, apt changelog, docker-compose changelog

https://kubernetes.io/blog/2024/08/13/kubernetes-v1-31-release/#improved-ingress-connectivity-reliability-for-kube-proxy

https://kubernetes.io/blog/2024/08/13/kubernetes-v1-31-release/#persistent-volume-last-phase-transition-time

https://kubernetes.io/blog/2022/08/23/kubernetes-v1-25-release/#pod-security-changes

https://kubernetes.io/blog/2022/05/05/volume-expansion-ga/

https://docs.aws.amazon.com/eks/latest/userguide/ebs-csi-migration-faq.html

https://github.com/kubernetes/enhancements/issues/34

https://kubernetes.io/docs/setup/release/notes/#v1-14-0

https://kubernetes.io/blog/2018/12/03/kubernetes-1-13-release-announcement/

https://www.storagereview.com/kubernetes_announces_version_112

https://coreos.com/blog/kubernetes-112-released

https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/

https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.10.md/#v1100

https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.2.md#v120