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Tech Internals Conf 2024, Cyprus 19 April 2024

https://internals.tech/2024/abstracts/9887

As a group of technology enthusiasts, we have combined our knowledge and experience to create a product aimed at simplifying and improving processes for a wide range of users. Our primary focus is on bare-metal servers, where we traditionally encounter the following problems:

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Hi there! I’m Andrei Kvapil, but you might know me as @kvaps in communities dedicated to Kubernetes and cloud-native tools. In this article, I want to share how we implemented our own extension api-server in the open-source PaaS platform, Cozystack.

Kubernetes truly amazes me with its powerful extensibility features. You’re probably already familiar with the controller concept and frameworks like kubebuilder and operator-sdk that help you implement it. In a nutshell, they allow you to extend your Kubernetes cluster by defining custom resources (CRDs) and writing additional controllers that handle your business logic for reconciling and managing these kinds of resources. This approach is well-documented, with a wealth of information available online on how to develop your own operators.

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We have updated the kubectl-node-shell plugin to v1.11.0.

  • Added options: no-mount, – no-net, – no-ipc,–no-uts to disable automatic entry into the specified Linux namespaces.
  • Added variable: KUBECTL_NODE_SHELL_IMAGE_PULL_SECRET_NAME to specify a pullSecret for pulling the image.
  • Added ability to attach volumes using the -m option; attached volumes can be found in the /opt-pvc directory.

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Kubernetes is widely known for being the container orchestration tool, and lately being the orchestrator of “everything”, such as external resources thanks to Crossplane, Databases with popular operators, and beyond. What if we had a Platform able to operate and pilot itself, with a fraction of human-based operations? In this talk, Andrei and Dario’s knowledge and developer experience will shed light on the tools being able to execute complex tasks such as installing Kubernetes on bare metal servers (Talos Linux), tools being able to satisfy all the complex conditions of orchestrating Virtual Machines (KubeVirt), till to operate Kubernetes clusters at large scale (Cluster API, Kamaji).

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Approaching the most interesting phase, this article delves into running Kubernetes within Kubernetes. Technologies such as Kamaji and Cluster API are highlighted, along with their integration with KubeVirt.

Previous discussions have covered preparing Kubernetes on bare metal and how to turn Kubernetes into virtual machines management system. This article concludes the series by explaining how, using all of the above, you can build a full-fledged managed Kubernetes and run virtual Kubernetes clusters with just a click.

First up, let’s dive into the Cluster API.

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Author's picture

Andrei Kvapil

CEO & Founder

Ænix

Czech republic, EU