What are the main components of the Kubernetes system architecture?

The main components of Kubernetes architecture are divided into two groups: control plane components and worker node components.

Control Plane Components:

• API Server (kube-apiserver): the central point of interaction with the cluster, accepts REST requests and updates the cluster state.
• Scheduler (kube-scheduler): responsible for distributing pods across worker nodes based on resources and policies.
• Controller Manager (kube-controller-manager): runs controllers that monitor the cluster's state and ensure it matches the desired state.
• etcd: a distributed key-value store where all configuration and cluster state are stored.

Worker Node Components:

• kubelet: an agent that runs and manages containers on the node, interacts with the API Server.
• kube-proxy: provides network routing and load balancing for services.
• Container Runtime: software for running containers (e.g., Docker, containerd).

This architecture provides scalability, fault tolerance, and container management within the cluster.