kubernetes - Pod 相对于容器的优势

Question

看了很多kubernetes的文档都没有得到答案。在 kubernetes 架构中，基本组件是 pod。为什么它在容器之上创建一个抽象层来创建 pod 并对其进行管理，而不是直接管理容器。 kubernetes 通过管理 pod 而不是容器获得的主要优势是什么。

容器上的包装器的任务是什么？

Answer 1

我认为在官方文档中Understanding pod有一个很好的描述

Pods in a Kubernetes cluster can be used in two main ways:

Pods that run a single container. The “one-container-per-Pod” model is the most common Kubernetes use case; in this case, you can think of a Pod as a wrapper around a single container, and Kubernetes manages the Pods rather than the containers directly.

Pods that run multiple containers that need to work together. A Pod might encapsulate an application composed of multiple co-located containers that are tightly coupled and need to share resources. These co-located containers might form a single cohesive unit of service–one container serving files from a shared volume to the public, while a separate “sidecar” container refreshes or updates those files. The Pod wraps these containers and storage resources together as a single manageable entity.

如果您想到运行单个容器的 Pod，那么您可能会认为维护容器更合理，但在第二种情况下，运行需要协同工作的多个容器的 Pod 可能会面临更多的复杂性