Explore Kubernetes architecture, frameworks, and interfaces. Gain insights into deployment, scaling, and management of containerized applications. Discover extensibilities and get hands-on customizing Kubernetes.

k8s-go.tar.gz

k8s-go-v2

go-env-v2

Kubernetes is a popular open-source container orchestration system that automates the deployment, scaling, and management of containerized applications. This course is designed to provide a comprehensive understanding of Kubernetes and its programming concepts. You’ll dive deep into advanced topics of Kubernetes.

This course will cover topics such as Kubernetes architecture, frameworks, plugins, and interfaces. You’ll also learn the powerful extensibilities of Kubernetes and make full use of these built-in capabilities to build your customized Kubernetes.

This course is ideal for developers, DevOps engineers, and system administrators who want to learn how to master Kubernetes. By the end of the course, you’ll have a solid understanding of Kubernetes, its programming concepts, and be able to deploy, scale, and manage containerized customizations on Kubernetes. You will also get hands-on experience extending Kubernetes to meet your requirements.

Programming with Kubernetes

# The `kube-controller-manager`

In this course, we won't make any customizations of the `kube-controller-manager`. So, this lesson will only give us a basic understanding of what the `kube-controller-manager` does. At the same time, we could benefit a lot from the design of the `kube-controller-manager`. This is where the operator pattern originates from.

## What does the `kube-controller-manager` do?

As we discussed previously, the control plane is responsible for driving the actual state of the system toward the desired state. However, the `kube-apiserver` focuses on storing resources and providing RESTful services for all clients. The `kube-scheduler` assigns unassigned pods with the best-matched nodes. In the control plane, we need a component that can do the convergences. This is done by the `kube-controller-manager`.

The `kube-controller-manager` performs cluster-level functions. Primarily, it manages a group of controllers that's responsible for reconciling the state of objects—such as `Deployment` and `Service`—and performing routine tasks. For instance, a replication controller ensures that the desired number of `Pod` objects are running healthily in the cluster by scaling up or down when the desired number isn't met.

Before Getting Started

Kubernetes Architecture

Customizing AuthX

Dynamic Admission Control

Customizing Schedulers

Extending APIs with CustomResourceDefinition (CRD)

Extending APIs with Aggregated APIServer

Container Network Interface

Container Runtime Interface

Extend kubectl

How to Write Good Kubernetes Operators

Assessment of Programming with Kubernetes

Wrap Up

The Manufactory of Kubernetes: The kube-controller-manager

The `kube-controller-manager`

What does the