One-year support window
Starting with 1.19, each minor release receives patch support for one year instead of nine months, based on survey data about how slowly users upgrade.
Kubernetes minor release · “Accentuate the Paw-sitive”
Kubernetes 1.19
A 20-week cycle, stretched by the events of 2020, that lengthened each minor version's support window to one year and brought Ingress to GA, structured logging, and new storage-awareness features.
End of life
End of life since 28 Oct 2021 (5.0 years ago). No more patches upstream.
Released26 Aug 2020
Maintenance mode—
End of life28 Oct 2021
Latest patch1.19.1628 Oct 2021
Patch releases16
Support span14.1 months
What 1.19 brought
Ingress API goes GA
After a long beta that made it a de facto standard, Ingress becomes a v1 API that the project commits to support.
Kubelet client certificate rotation
The kubelet's automatic renewal of its client certificate and key as expiry approaches graduates to stable.
Structured logging
klog gains structured methods such as InfoS and ErrorS that take a message plus key-value pairs, making control-plane logs easier to parse.
Storage capacity tracking
CSI drivers can report remaining capacity, which the scheduler uses when choosing a node so pods are not placed where storage would run out.
Generic ephemeral volumes
Any dynamically provisioning storage driver can supply a volume whose lifetime is tied to the Pod, with full StorageClass and PVC features.
Summarised in our own words from the official “Kubernetes 1.19: Accentuate the Paw-sitive” announcement (34 tracked enhancements), © The Kubernetes Authors, CC BY 4.0.
APIs that stopped being served in 1.19
No API versions were removed in 1.19.
API versions deprecated in 1.19
Still served in 1.19, but the API server answers with a deprecation warning and a removal is scheduled.
Stable (GA) API kinds new in 1.19
AdmissionReview admission.k8s.io/v1LocalSubjectAccessReview authorization.k8s.io/v1SelfSubjectAccessReview authorization.k8s.io/v1SelfSubjectRulesReview authorization.k8s.io/v1CertificateSigningRequest certificates.k8s.io/v1Event events.k8s.io/v1Ingress networking.k8s.io/v1IngressClass networking.k8s.io/v1
Upgrading
Version skew with a 1.19 API server
- kubelet, kube-proxy: 1.17 to 1.19
- kube-controller-manager, scheduler: 1.18 to 1.19
- kubectl: 1.18 to 1.20
From the official version skew policy as it stands today.
One minor at a time
The API server must not skip minor versions.