Kubernetes Architecture : How It Actually Flows

Description

Kubernetes Architecture : How It Actually Flows This knowledge map shows the core control loop of Kubernetes in action: 1. kubectl → API Server All commands first reach the API Server, the single entry point to the cluster. 2. API Server 🔄 etcd The API Server stores and retrieves cluster state from etcd (the source of truth). 3. Controllers Watch & Reconcile The Controller Manager continuously watches the cluster state and works to make the current state match the desired state. 4. Scheduler Assigns Pods When a new Pod is created, the Scheduler selects the most suitable worker node and records that decision via the API Server. 5. kubelet Executes on Worker Nodes The kubelet on the assigned node watches the API Server, pulls the Pod specification, and instructs the container runtime to: * Pull images from the registry * Start/stop containers * Manage resources 6. kube-proxy Handles Service Networking kube-proxy configures network rules to enable internal service communication and load balancing. 🔄 Everything Runs on a Continuous Reconciliation Loop Kubernetes is not command-driven, it is state-driven. You declare the desired state, and the control plane continuously works to enforce it. Note: This is a high-level conceptual diagram created for learning purposes. Real-world Kubernetes clusters include additional components and more nuanced control-plane communication patterns not fully represented here. #kubernetes #k8s #kuberenetesarchitecture #kodekloud