OpenTelemetry graduates, Microcks incubates

Two days ago, the CNCF TOC voted to graduate the OpenTelemetry project. Today, OpenTelemetry is used "at hundreds (potentially thousands) of organizations worldwide", with dozens of them listed here. It's also supported by major observability vendors, including Dash0, Datadog, Dynatrace, Grafana, Honeycomb, New Relic, Splunk, and many more.

A week ago, another CNCF project, Microcks, was officially moved to the Incubating status. Microcks is a tool for API mocking and testing. It was created by an individual in 2015 and accepted to the CNCF Sandbox in 2023. Its public adopters include Amadeus, Amway, BNP PARIBAS, Michelin, and Nordic Semiconductor.

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HAMi became a CNCF Incubating project

HAMi was originally known as k8s-vGPU-scheduler and today stands for Heterogeneous AI computing virtualisation Middleware. It enables slicing a physical GPU into units by memory/core/device count, enforcing hard runtime isolation, and scheduling Pods using binpack, spread, and topology-aware policies. You can learn more about this project from this overview.

HAMi joined the CNCF Sandbox in August, 2024. Two weeks ago, the CNCF TOC voted to promote it to the incubating level. This change was formally announced yesterday.

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Buildpacks graduates, k8gb incubates

Following the CNCF TOC votes that happened over the last weekend, two CNCF projects were promoted to the next level:

1. Buildpacks, a set of specifications and tooling that transform application source code into container images that can run on any cloud, became a Graduated project. It was started by Pivotal and Heroku in January 2018, joined the CNCF Sandbox in October 2018, and became Incubated in November 2020. The companies that adopted Buildpacks include Bloomberg, Google, Microsoft, Red Hat, Salesforce, and VMware by Broadcom.

2. k8gb, a Kubernetes global balancer, became an Incubating project. It originated in Absa Group in 2019 and joined the CNCF Sandbox in March 2021. Current k8gb adopters include Eficode, Millennium bcp, and PagBank.

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Confidential Containers became a CNCF Incubating project

Another level up has just happened in the CNCF, with its TOC accepting moving Confidential Containers to the Incubating level. This project enables confidential computing by leveraging hardware-based TEEs (Trusted Execution Environments) to protect containers and data by encrypting data during computation.

Confidential Containers started in 2021 by Red Hat, Intel, IBM, and other companies. It was accepted into the CNCF Sandbox in March 2022. Today, this technology is used in IBM LinuxONE, Red Hat OpenShift, Kubermatic KubeOne, Alibaba Cloud, and several other solutions.

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Kubeflow became a CNCF Graduated project

The summer series of CNCF level-ups keeps going, and Kubeflow has just joined the list of the organisation’s most mature (i.e. Graduated) projects. The CNCF Technical Oversight Committee (TOC) voted for this graduation last Friday.

Kubeflow is a machine learning toolkit for Kubernetes that serves as a foundation for K8s-based AI platforms. Its subprojects include Pipelines for end-to-end ML workflows, Trainer for distributed AI model training and LLM fine-tuning, Katib for AutoML, and a Kubernetes operator for Apache Spark.

Kubeflow originated in Google, with its first public announcement in 2017. It was accepted into the CNCF as an Incubating project in July 2023. Today, its adopters include Alibaba Cloud, AWS, Cisco, Huawei, IBM, NVIDIA, Red Hat, and Tencent.

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k8gb v1.0.0

k8gb, a Kubernetes Global Balancer, originated at Absa Group. More than six years have passed since the first whiteboard session in Johannesburg, conducted by Yury Tsarev and Bradley Andersen, both employed by this company at the time. In 2021, k8gb was accepted into the CNCF Sandbox, and earlier this year, as we mentioned recently, it became a CNCF Incubating project.

Yesterday, right during its 100th community meeting, the k8gb maintainers pushed the v1.0.0 release. This update highlights a significant milestone in the project's maturity.

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Karmada became a CNCF Graduated project

Karmada extends the standard Kubernetes API, allowing orchestration of applications across multiple clusters, clouds, and regions without modifying the apps themselves. Earlier this month, the CNCF Technical Oversight Committee (TOC) voted to graduate Karmada, and the decision was formally announced on the CNCF blog now.

Karmada originated in Huawei and was publicly announced at the Huawei Developer Conference 2021. It was accepted into the CNCF Sandbox in September 2021 and promoted to the Incubating level in December 2023. Today, Karmada adopters include Alibaba Cloud, Bloomberg, Huawei, Trip.com, Vivo, and Wellhub.

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KubeVM from VMware Tanzu joins CNCF Sandbox

Tanzu, VMware's Kubernetes platform, has a VM Operator project that enables virtual machine management via a Kubernetes-style declarative API. It brought to life another project called KubeVM, which was developed in a separate branch of its repo and implemented “a vendor-neutral Kubernetes API for managing the full lifecycle of virtual machines on any hypervisor, implemented through pluggable providers.”

How is it different from KubeVirt? Here's how the KubeVM authors explain: “KubeVM leaves the VM as a native object of the underlying platform and uses Kubernetes as the API surface, delegating placement, migration, and storage to that platform. The two answer the same question for different starting conditions: Kubernetes as the only infrastructure layer, versus Kubernetes as a front door to an existing one. The relationship is intended to be integration: a KubeVirt provider is on KubeVM's roadmap, so the portable API can run on KubeVirt.”

A month ago, KubeVM applied to joining the CNCF Sandbox. A few days ago, the project was accepted by the CNCF TOC.

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gVisor was donated to CNCF and joins its Sandbox

gVisor is a well-known "container sandbox", an application kernel that runs in userspace and implements a Linux-like interface to isolate running applications and the host operating system. It was developed by Google and became Open Source in 2018. Today, gVisor is part of the numerous Google products, including GKE, Google Cloud Run, Gemini, YouTube, and Gmail.

In September, Google opened a formal request to consider gVisor for the CNCF Sandbox. By the end of the month, the CNCF Technical Oversight Committee voted to accept it. In October, a blog post announcing the donation of gVisor to the CNCF was published. It also revealed the gVisor author' intention to begin moving to the CNCF Incubated projects in the next few months.

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Cozystack became a CNCF Incubating project

The CNCF TOC has just voted to promote Cozystack to the Incubating level. Cozystack is a platform and framework for building clouds offering Kubernetes and various managed services, including virtual machines, databases, and more, all based on well-known Open Source solutions. The project originated in Ænix and was accepted into the CNCF Sandbox in March 2025.

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KubeVirt and NATS became CNCF Graduated projects

A few days ago, the CNCF Technical Oversight Committee (TOC) voted to graduate KubeVirt and NATS.

KubeVirt, a virtual machine management add-on for Kubernetes, was accepted to the CNCF in 2019 and incubated in 2022. Its adopters today include ARM, Civo, Cloudflare, Microsoft, Nebius, NVIDIA, Oracle, Red Hat, SUSE, and Swisscom.

NATS, a high-performance cloud- and edge-native messaging system, was accepted to CNCF in 2018 as an Incubating project. Last year, this project went through a drama involving its original owner (Synadia) trying to reclaim ownership from the CNCF, but it ended well, and the project was left with the CNCF. Today, NATS's notable adopters include Alibaba, Baidu, Ericsson, Hewlett Packard Enterprise, Mastercard, PayPal, Siemens, and Walmart.

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