An open-source container orchestration technology called Kubernetes (sometimes referred to as "k8s" or "Kube") automates a lot of the labor-intensive steps required in setting up, running, and scaling containerized applications. This blog will go into great detail about Kubernetes, its several iterations, the latest Kubernetes, and more. Declarative configuration and automation are made easier by the portability and extensibility of Kubernetes, an open-source platform for managing containerized workloads and services. It has a huge, expanding ecosystem. Also, services, assistance, and tools for Kubernetes are widely accessible.
Greek helmsman or pilot is the meaning of the word Kubernetes. The eight letters between the "K" and the "s" are what lead to the abbreviation "K8s." Initially created by Google engineers, Kubernetes was open-sourced in 2014. It combines the greatest ideas and techniques from the community with more than 15 years of Google's experience managing large-scale production workloads. Following Semantic Versioning terminology,
Kubernetes versions are written as x.y.z, where x denotes the major version, y is the minor version, and z is the patch version. Apply for Docker and Kubernetes Certification if you wish to make your career in Kubernetes.
What is the Kubernetes Version?
The three parts that make up the Kubernetes release versions. The major version (v1) is presented first, followed by the minor version (19), and finally, the patch version (3).
Patches are published more frequently with important bug fixes, whereas minor versions are released every few months with new features and functionalities. General compatibility with the preceding version is shown by each number in the version:
- Major versions must be changed when backward compatibility may be compromised by incompatible API upgrades.
- Minor versions are updated accordingly When backward-compatible functionality upgrades are implemented.
- Patch versions are updated when backward-compatible bug fixes are made.
Try to keep your minor version updated by running the most recent patch release. Your production cluster, for instance, is located at 1.17.7. The most recent patch for the 1.17 series may be found at 1.17.8. To guarantee that your cluster is properly patched and supported, you should upgrade to 1.17.8 as soon as feasible.
Different Versions of Kubernetes
Different versions of Kubernetes bring in specific enhancements to the product. The table below shows the Kubernetes version history.
|Version||Release date||End of Life date|
|1.0||10 July 2015|
|1.1||9 November 2015|
|1.2||16 March 2016||23 October 2016|
|1.3||1 July 2016||1 November 2016|
|1.4||26 September 2016||21 April 2017|
|1.5||12 December 2016||1 October 2017|
|1.6||28 March 2017||23 November 2017|
|1.7||30 June 2017||4 April 2018|
|1.8||28 August 2017||12 July 2018|
|1.9||15 December 2017||29 September 2018|
|1.10||28 March 2018||13 February 2019|
|1.11||3 July 2018||1 May 2019|
|1.12||27 September 2018||8 July 2019|
|1.13||3 December 2018||15 October 2019|
|1.14||25 March 2019||11 December 2019|
|1.15||20 June 2019||6 May 2020|
|1.16||22 October 2019||2 September 2020|
|1.17||9 December 2019||13 January 2021|
|1.18||25 March 2020||18 June 2021|
|1.19||26 August 2020||28 October 2021|
|1.20||8 December 2020||28 February 2022|
|1.21||8 April 2021||28 June 2022|
|1.22||4 August 2021||28 October 2022|
|1.23||7 December 2021||28 February 2023|
|1.24||3 May 2022||29 September 2023|
|1.25||23 August 2022||27 October 2023|
Table - Kubernetes version list
What is the Latest Version of Kubernetes?
The latest version of Kubernetes or the most recent three minor releases (1.25, 1.24, 1.23 includes improvements, bug fixes, and new features that make the platform more dependable, scalable, and user-friendly. There are a significant number of API deletions and a total of 56 improvements of varying maturity levels. Kubernetes current version always has some enhancement, so check the official website for updates.
Check out the schedule for the upcoming 1.26 Kubernetes release or check for the current Kubernetes version.
How Do Kubernetes Versions Work?
Kubernetes employs the common Semantic Versioning scheme: major, minor, and patch. For instance: 1.17.7 1.17.8 The version number indicates how generally compatible each number is with the preceding version. The earliest minor version and patch releases supported are deprecated and removed when a new minor version is released.
Kubernetes Release Scheme and How Do They Handle It in Different Cloud Platforms?
The Semantic Versioning Specification, used by the Kubernetes release system, states that, given a version number of Major. Minor. Patch, you should increase the:
- The Major version, when you make backward-incompatible API
- Change the Minor version when you add functionality
- The Patch version when you address bugs.
A software update is backward-compatible if its modifications don't disrupt external components that rely on interfaces established in earlier iterations.
1. How Does Google Handle K8s Versions?
GKE now supports a minimum of two Minor versions. A recent Kubernetes Minor or Patch release's stable release serves as the default version for newly established GKE clusters. Versions that are more recent than the default are typically made available on a weekly basis.
Google automatically updates cluster masters and nodes by default. This comprises the Docker daemon, the OS base image, the Kubelet, and the Kube-proxy.
Google makes sure that the versions on the master and nodes are in sync. The documentation for Google Cloud contains comprehensive information on automated upgrades, release notes, and schedules for certain versions.
2. How Does Microsoft Handle K8s Versions?
The current Minor version of Kubernetes and the three preceding Minor versions are supported by AKS. Additionally, each Minor version supports two reliable Patches.
The previous Minor version and Patch releases are retired when a new Minor version is released. Within 30 days after an upstream release, AKS strives to certify and make available new Kubernetes versions, subject to the release's stability.
3. How Does Canonical Handle K8s Versions?
Snap channels are used to manage Kubernetes versions in Canonical's Charmed Kubernetes distribution. Then, upgrades can be carried out by choosing the appropriate channel and launching the upgrade operation in Juju. Some of the Kubernetes cluster components utilized by the Charmed Kubernetes distribution, such as Docker, Etcd, Flannel, and easy, are not included in the upgrade.
4. How Does Digitalocean Handle K8s Versions?
By enabling automatic upgrades for each cluster, DigitalOcean Kubernetes offers Patch-level only updates that can be initiated manually or automatically during a specific maintenance window.
Upgrades to minor versions are not supported. It is advised that you move your workload to another cluster that has been updated. The master nodes are upgraded first, causing a brief outage of the Kubernetes API, and then the nodes are upgraded on a rolling basis, one worker pool at a time.
5. How Does AWS Handle K8s Versions?
Amazon EKS supports only particular versions of Kubernetes. As of the time of writing, these are the newly formed clusters: 1.13.8, 1.12.10, and 1.11.10. At any one time, Amazon EKS will run three production-ready versions of Kubernetes, with the fourth version under deprecation (currently 1.10).
The initial Amazon EKS platform version for a new Kubernetes minor version begins at eks.1 when it becomes accessible on Amazon EKS. It may take some time to implement automatic updates of current Amazon EKS platform versions. The newest version of the Amazon EKS platform for the specified Kubernetes version is always used to establish clusters. You can take the DevOps Course and learn Kubernetes basics and fundamentals to enhance your skills.
Why Do You Need Kubernetes?
You can concentrate on the application with Kubernetes. It becomes less crucial to adapt the software to specific systems, allowing you to create a user experience and business plan that will enable you to make gratifying profits. Thus we need Kubernetes because -
1. Encourages Company Expansion
Organizations that use Kubernetes have seen significant growth. The cycle of software development becomes more productive and efficient using Kubernetes versions. The following are just a few advantages associated with using Kubernetes:
- Short lifecycle of software development.
- Organizations can now switch to the cloud.
- The way that resources are used has improved.
2. Increased Scalability and Availability of the System
Scalability refers to a system or network's capacity to expand and cope with rising demands. The amount of time a system is available to carry out the duties it must do during a given timeframe is known as availability. A system can become scalable and available thanks to Kubernetes.
You might use a CPU-intensive application. Due to business requirements, the application also experiences significant traffic at specific times. When necessary, Kubernetes will force the resource to scale up. If the load drops, it will likewise scale back. Your application will be more stable, thus helping businesses with increased scalability and availability.
3. Transparent And Automated Procedures
It used to take a lot of time to install new programs on actual virtual machines. Kubernetes register all product-related events. Changes are simple to track, and repeated tasks can be automated. This speed-up labor reduces the likelihood of human error and, in the event of a problem, aids in identifying its origin.
With Kubernetes, automatic implementations and updates are versatile in their configuration. It is sufficient to outline the installation method. By adding nodes to the cluster (autoscaling), the system will increase computing capacity, alter the present state into the anticipated state, apply new solutions, and add or remove containers depending on the deployment settings.
4. Possibly Less Expensive Than Other Options
Some applications demand more powerful computational capabilities. The most cost-effective option for you will be Kubernetes. You won't have to spend money on resources you don't require. or assets that you do not utilize, thanks to Kubernetes. Due to its auto-scaling ability, as previously mentioned, this is achievable.
Kubernetes is a potent new open-source operations solution that helps businesses scale, increase resilience, and hasten deployment. With our KnowledgeHut's Docker and Kubernetes Certification course, you can utilize it, as well as the variety of open-source technologies that surround and support it, to the fullest extent.