🔖 Cluster Architecture Installation and Configuration

• 🏷️ Prepare underlying infrastructure for installing a Kubernetes cluster
• 🏷️ Create and manage Kubernetes clusters using kubeadm
• 🏷️ Manage the lifecycle of Kubernetes clusters
• 🏷️ Understand extension interfaces (CNI, CSI, CRI, etc…)
• 🏷️ Use Helm and Kustomize to install cluster components
• 🏷️ Manage role based access control (RBAC)
• 🏷️ Implement and configure a highly-available control plane
• 🏷️ Understand CRDs, install and configure operators

—

Cluster Components

• Control Plane Components:

  • kube-apiserver, which acts as the primary entry point for all cluster operations and validates requests;

  • etcd, a distributed key-value store that serves as the single source of truth for the cluster’s configuration and state data;

  • kube-scheduler, which determines the optimal node for scheduling new pods based on resource availability and constraints;

  • kube-controller-manager, which runs controllers that handle routine tasks like maintaining the desired state of the cluster, managing node health, and replicating pods;

  • cloud-controller-manager, an optional component that integrates Kubernetes with cloud provider APIs for managing cloud-specific resources.

• Worker Node Components:

  • kubelet, an agent that runs on each node and ensures that the containers defined in pods are running and healthy;

  • kube-proxy, a network proxy that runs on each node to manage network rules and enable communication between pods and external services.

See