Kubernetes 1.15 arrives with structural schemas and kubeadm updates
The latest release of Kubernetes is out and it brings a long list of updates and improvements. The main themes for this release are continuous improvement and extensibility. Let’s take a closer look.
The second Kubernetes release for 2019 is here!
Kubernetes 1.15 has continuous improvement and extensibility as its main themes and it brings a nice list of improvements.
This release includes a total of 25 enhancements including two features moving to stable and 13 in beta.
Let’s have a look at the most interesting highlights.
All the highlights
Structural schema – From 1.15 on each schema gets checked against the restriction called “structural schema”. This restriction enforces non-polymorphic and complete typing of each field in a CustomResource. In the future, structural schemas will be required for all new features including:
- beta: CustomResourceDefinition Webhook Conversion
- beta: CustomResourceDefinition OpenAPI Publishing
- beta: CustomResourceDefinitions Pruning
- alpha: CustomResourceDefinition Defaulting
- beta: Admission Webhook Reinvocation & Improvements
kubeadm – Features and stability work continue to be pushed to the cluster lifecycle building block, including:
- High availability (HA) capability promoted to beta, allowing users to use the familiar
- Certificate management has become more robust with kubeadm now seamlessly rotating all your certificates (on upgrades) before they expire.
- The kubeadm configuration file API is moving from v1beta1 to v1beta2
SIG Storage – Introduces new alpha functionality in CSI that doesn’t exist in the Kubernetes Storage subsystem yet, like volume cloning which enables users to specify another PVC as a “DataSource” when provisioning a new volume.
Other notable updates include:
- Support for go modules in Kubernetes Core
- Continued preparation on cloud provider extraction and code organization. The cloud provider code has been moved to kubernetes/legacy-cloud-providers for easier removal later and external consumption.
- Kubectl ‘get and describe’ now works with extensions
- Nodes now support third party monitoring plugins.
- A new Scheduling Framework for schedule plugins is now Alpha
- ExecutionHook API designed to trigger hook commands in the containers for different use cases is now Alpha.
- Continued deprecation of extensions/v1beta1, apps/v1beta1, and apps/v1beta2 APIs; these extensions will be retired in 1.16
You can check out the official release notes for all the detailed information.