K8s 理念--控制平面&& Pod、ReplicaSet 和部署

mac：

Keywords:

   kubelet:

Node-level components, such as the kubelet, communicate with the control plane using the Kubernetes API, which the control plane exposes. End users can also use the Kubernetes API directly to interact with the cluster

     control plane:

The Control Plane is responsible for managing the cluster. The Control Plane coordinates all activities in your cluster, such as scheduling applications, maintaining applications' desired state, scaling applications, and rolling out new updates.

   

   控制平面（Control Plane）是 Kubernetes 集群中用于维护和管理集群状态的组件，包括：

• kube-apiserver：Kubernetes API 的服务器，是控制平面的前端。
• etcd：轻量级、分布式的键值存储系统，用于保存集群的所有数据。
• kube-scheduler：负责决定新创建的 Pod 应该运行在哪个节点上。
• kube-controller-manager：运行了一组控制器，这些控制器会持续监控集群的状态，并确保集群的实际状态与期望状态一致。
• cloud-controller-manager：运行了一组控制器，这些控制器与云服务提供商的服务交互。

 node:

A node is a VM or a physical computer that serves as a worker machine in a Kubernetes cluster

 pod:

在 Kubernetes 中，Pod 是可以在 Node 上运行的最小和最简单的单元。每个 Pod 包含一个或多个容器，这些容器共享存储和网络资源。

minikube:

To get started with Kubernetes development, you can use Minikube. Minikube is a lightweight Kubernetes implementation that creates a VM on your local machine and deploys a simple cluster containing only one node.

The Minikube CLI provides basic bootstrapping operations for working with your cluster, including start, stop, status, and delete

Kubernetes 中，Pod、ReplicaSet 和 Deployment

为什么 Deployment 不直接管理 pod ，还衍生一个 ReplicaSet