Kubernetes 1.24: Stargazer

--- layout: blog title: "Kubernetes 1.24: Stargazer" date: 2022-05-03 slug: kubernetes-1-24-release-announcement --- # Kubernetes 1.24 **Authors**: [Kubernetes 1.24 Release Team](https://github.com/kubernetes/sig-release/blob/master/releases/release-1.24/release-team.md) We are excited to announce the release of Kubernetes 1.24, the first release of 2022! This release consists of 46 enhancements: 15 enhancements have graduated to stable, 15 enhancements are moving to beta, and 13 enhancements are entering alpha. Also, 2 features have been deprecated, and the [dockershim has been removed](https://kubernetes.io/blog/2022/02/17/dockershim-faq/). ## Major Themes ### Dockershim Removed from kubelet Following a deprecation period that started with the v1.20 release, [Kubernetes no longer includes the _dockershim_ adapter](https://github.com/kubernetes/enhancements/issues/2221). If you have been relying on Docker Engine as your container runtime, you will need to either switch to using a different [supported container runtime](https://kubernetes.io/docs/setup/production-environment/container-runtimes/) (such as containerd or CRI-O), or use continue to use Docker Engine but via an adapter such as cri-dockerd. For information relating the this removal and how it's relevant to upgrades, read [Is Your Cluster Ready for v1.24?](/blog/2022/03/31/ready-for-dockershim-removal/). ### CNI Version-Related Breaking Change Before you upgrade to Kubernetes 1.24, if you use a [Container Network Interface (CNI)](https://github.com/containernetworking/cni) network plugin that complies with CNI versions earlier than v1.0.0 and you plan to use any of the following container runtimes, you must specify the CNI version as described in [Declaring the CNI version of your plugin](TBD). Otherwise, your network will break. This issue applies to the following container runtimes: * containerd v1.6.0 and later * CRI-O 1.24 and later * cri-dockerd [vTBD] and later ### Beta APIs Off by Default [New beta APIs will not be enabled in clusters by default](https://github.com/kubernetes/enhancements/issues/3136). Existing beta APIs and new versions of existing beta APIs, will continue to be enabled by default. ### OpenAPI v3 Kubernetes 1.24 offers beta support for publishing its APIs as [OpenAPI v3](https://github.com/kubernetes/enhancements/issues/2896). ### Signing Release Artifacts [Release artifacts are signed](https://github.com/kubernetes/enhancements/issues/3031). ### Storage Capacity and Volume Expansion Are Generally Available [Storage capacity tracking](https://github.com/kubernetes/enhancements/issues/1472) supports exposing currently available storage capacity via CSIStorageCapacity objects and enhances scheduling of pods that use CSI volumes with late binding. [Volume expansion](https://github.com/kubernetes/enhancements/issues/284) add support for resizing existing persistent volumes. ### NonPreemptingPriority This feature adds [a new option to PriorityClasses](https://github.com/kubernetes/enhancements/issues/902), which can enable or disable pod preemption. ### In-Tree CSI Providers [Migrate the internals of the in-tree plugins](https://github.com/kubernetes/enhancements/issues/625) to call out to CSI Plugins while maintaining the original API. [Azure Disk](https://github.com/kubernetes/enhancements/issues/1490) and [OpenStack Cinder](https://github.com/kubernetes/enhancements/issues/1489) have both been migrated. ### gRPC Probes Graduates to Beta With Kubernetes 1.24, the [gRPC probes functionality](https://github.com/kubernetes/enhancements/issues/2727) has entered beta and is available by default. You can now [configure startup, liveness, and readiness probes](/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#configure-probes) for your gRPC app natively within Kubernetes, without exposing an HTTP endpoint or using an extra executable. ### Kubelet Credential Provider Graduates to Beta Released as Alpha in Kubernetes 1.20, the [Kubelet Credential Provider](https://github.com/kubernetes/enhancements/issues/2133) has now graduated to Beta. This allows the kubelet to dynamically retrieve credentials for a container image registry using exec plugins, communicating through stdio using Kubernetes versioned APIs, rather than storing them statically on disk. ### Contextual Logging in Alpha Kubernetes v1.24 has introduced [contextual logging](https://github.com/kubernetes/enhancements/issues/3077) that enables the caller of a function to control all aspects of logging (output formatting, verbosity, additional values and names). ### Avoiding collisions in IP allocation to Services Kubernetes 1.24 introduces a new Feature Gate `ServiceIPStaticSubrange` that allows to use a [different IP allocation strategy for Services](https://github.com/kubernetes/enhancements/issues/3070), reducing the risk of collision. A Service `ClusterIP` can be assigned either: * dynamically, which means the cluster will automatically pick a free IP within the configured Service IP range. * statically, which means the user will set one IP within the configured Service IP range. Service `ClusterIP` are unique, hence, trying to create a Service with a `ClusterIP` that has already been allocated will return an error. ## Other Updates ### Graduated to Stable * [Container Storage Interface (CSI) Volume Expansion](https://github.com/kubernetes/enhancements/issues/284) * [PodOverhead](https://github.com/kubernetes/enhancements/issues/688): Account for resources tied to the pod sandbox, but not specific containers. * [Add non-preempting option to PriorityClasses](https://github.com/kubernetes/enhancements/issues/902) * [Storage Capacity Tracking](https://github.com/kubernetes/enhancements/issues/1472) * [OpenStack Cinder In-Tree to CSI Driver Migration](https://github.com/kubernetes/enhancements/issues/1489) * [Azure Disk In-Tree to CSI Driver Migration](https://github.com/kubernetes/enhancements/issues/1490) * [Efficient Watch Resumption](https://github.com/kubernetes/enhancements/issues/1904): Watch can be efficiently resumed after kube-apiserver reboot. * [Service Type=LoadBalancer Class](https://github.com/kubernetes/enhancements/issues/1959): Introduce a new Service annotation `service.kubernetes.io/load-balancer-class` that allows multiple implementations of Service Type=LoadBalancer in a cluster. * [Indexed Job Semantics in Job API](https://github.com/kubernetes/enhancements/issues/2214): Add a completion index to Pods of Jobs with fixed completion count. * [batch/v1: Add Suspend Field to Jobs API](https://github.com/kubernetes/enhancements/issues/2232): Add a suspend field to the Jobs API to allow orchestrators to create jobs with more control over when pods are created. * [Pod Affinity NamespaceSelector](https://github.com/kubernetes/enhancements/issues/2249): Adds namespaceSelector to pod affinity/anti-affinity spec. * [Leader Migration for Controller Managers](https://github.com/kubernetes/enhancements/issues/2436): kube-controller-manager and cloud-controller-manager can apply new controller-to-controller-manager assignment in HA control plane without downtime. * [CSR Duration](https://github.com/kubernetes/enhancements/issues/2784): Extend the Certificates API with a mechanism to allow clients to request a specific duration for the issued certificate. ### Release Notes Check out the full details of the Kubernetes 1.24 release in our [release notes](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.24.md). ### Availability Kubernetes 1.24 is available for download on [GitHub](https://github.com/kubernetes/kubernetes/releases/tag/v1.24.0). To get started with Kubernetes, check out these [interactive tutorials](https://kubernetes.io/docs/tutorials/) or run local Kubernetes clusters using Docker container “nodes” with [kind](https://kind.sigs.k8s.io/). You can also easily install 1.24 using [kubeadm](https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/). ### Release Team This release was made possible by a very dedicated group of individuals, who came together as a team to deliver technical content, documentation, code, and a host of other components that go into every Kubernetes release. A huge thank you to the release lead James Laverack for leading us through a successful release cycle, and to everyone else on the release team for supporting each other, and working so hard to deliver the 1.24 release for the community. ### Release Theme and Logo **Kubernetes 1.24:** ### User Highlights * Check out how leading retail e-commerce company [La Redoute used Kubernetes, alongside other CNCF projects, to transform and streamline its software delivery lifecycle](https://www.cncf.io/case-studies/la-redoute/) - from development to operations. * Trying to ensure no change to an API call would cause any breaks, [Salt Security built its microservices entirely on Kubernetes and it communicates via gRPC while Linkerd ensures messages are encrypted](https://www.cncf.io/case-studies/salt-security/). * In their effort to migrate from private to public cloud, [Allainz Direct engineers redesigned its CI/CD pipeline in just three months while managing to condense 200 workflows down to 10-15](https://www.cncf.io/case-studies/allianz/) . * Check out how [Bink, a UK based fintech company, updated its in-house Kubernetes distribtion with Linkerd to build a cloud-agnostic platform that scales as needed whilst allowing them to keep a close eye on performance and stability](https://www.cncf.io/case-studies/bink/). * Using Kubernetes, the Dutch organization [Stichting Open Nederland](http://www.stichtingopennederland.nl/) created a testing portal in just one-and-a-half months to help safely reopen events in the Netherlands. The [Testing for Entry (Testen voor Toegang)](https://www.testenvoortoegang.org/) platform [leverged the performance and scalability of Kubernetes to help individuals book over 400,000 COVID-19 testing appointments per day. ](https://www.cncf.io/case-studies/true/) * Working alongside SparkFabrik and utilizing Backstage, [Santagostino created the developer platform Samaritan to centralize services and documentation, manage the entire lifecycle of services, and simplify the work of Santagostino developers](https://www.cncf.io/case-studies/santagostino/). ### Ecosystem Updates * KubeCon + CloudNativeCon Europe 2022 will take place in Valencia, Spain, from 16 – 20 May 2022! You can find more information about the conference and registration on the [event site](https://events.linuxfoundation.org/archive/2021/kubecon-cloudnativecon-europe/). * In the [2021 Cloud Native Survey](https://www.cncf.io/announcements/2022/02/10/cncf-sees-record-kubernetes-and-container-adoption-in-2021-cloud-native-survey/), the CNCF saw record Kubernetes and container adoption. Take a look at the [results of the survey](https://www.cncf.io/reports/cncf-annual-survey-2021/). * The [Linux Foundation](https://www.linuxfoundation.org/) and [The Cloud Native Computing Foundation](https://www.cncf.io/) (CNCF) announced the availability of a new [Cloud Native Developer Bootcamp](https://training.linuxfoundation.org/training/cloudnativedev-bootcamp/?utm_source=lftraining&utm_medium=pr&utm_campaign=clouddevbc0322) to provide participants with the knowledge and skills to design, build, and deploy cloud native applications. Check out [the announcement](https://www.cncf.io/announcements/2022/03/15/new-cloud-native-developer-bootcamp-provides-a-clear-path-to-cloud-native-careers/) to learn more. ### Project Velocity The [CNCF K8s DevStats](https://k8s.devstats.cncf.io/d/12/dashboards?orgId=1&refresh=15m) project aggregates a number of interesting data points related to the velocity of Kubernetes and various sub-projects. This includes everything from individual contributions to the number of companies that are contributing, and is an illustration of the depth and breadth of effort that goes into evolving this ecosystem. In the v1.24 release cycle, which [ran for 18 weeks](https://github.com/kubernetes/sig-release/tree/master/releases/release-1.24) (January 10 to May 17), we saw contributions from [1029 companies](https://k8s.devstats.cncf.io/d/9/companies-table?orgId=1&var-period_name=v1.23.0%20-%20now&var-metric=contributions) and [1179 individuals](https://k8s.devstats.cncf.io/d/66/developer-activity-counts-by-companies?orgId=1&var-period_name=v1.23.0%20-%20now&var-metric=contributions&var-repogroup_name=Kubernetes&var-country_name=All&var-companies=All&var-repo_name=kubernetes%2Fkubernetes). ## Upcoming Release Webinar Join members of the Kubernetes 1.24 release team on <date> to learn about the major features of this release, as well as deprecations and removals to help plan for upgrades. For more information and registration, visit the [event page](#) on the CNCF Online Programs site. ## Get Involved The simplest way to get involved with Kubernetes is by joining one of the many [Special Interest Groups](https://github.com/kubernetes/community/blob/master/sig-list.md) (SIGs) that align with your interests. Have something you’d like to broadcast to the Kubernetes community? Share your voice at our weekly [community meeting](https://github.com/kubernetes/community/tree/master/communication), and through the channels below: * Find out more about contributing to Kubernetes at the [Kubernetes Contributors](https://www.kubernetes.dev/) website * Follow us on Twitter [@Kubernetesio](https://twitter.com/kubernetesio) for the latest updates * Join the community discussion on [Discuss](https://discuss.kubernetes.io/) * Join the community on [Slack](http://slack.k8s.io/) * Post questions (or answer questions) on [Stack Overflow](http://stackoverflow.com/questions/tagged/kubernetes) * Share your Kubernetes [story](https://docs.google.com/a/linuxfoundation.org/forms/d/e/1FAIpQLScuI7Ye3VQHQTwBASrgkjQDSS5TP0g3AXfFhwSM9YpHgxRKFA/viewform) * Read more about what’s happening with Kubernetes on the [blog](https://kubernetes.io/blog/) * Learn more about the [Kubernetes Release Team](https://github.com/kubernetes/sig-release/tree/master/release-team)