Kubernetes将弃用Docker，不必恐慌

小鱼儿 2022-12-26 14:28 140阅读 0赞

一切都如此悄悄地开始。作为广受欢迎的容器集群管理工具，在即将发行的Kubernetes 1.20版本说明文件中，Kubernetes（k8s）宣布："kubelet放弃对Docker的支持，并会在将来的版本中移除。"

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是的，实现了对Docker兼容支持其kubelet容器运行时Container Runtime Interface（CRI）标准的dockershim中间件将很快成为历史。所以呢？这没什么大不了的。

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谷歌云开发人员助理及著名的Kubernetes导师凯尔西·海托华（Kelsey Hightower）在推特上说："Docker不等于容器。Docker可以构建容器映像，Docker可以从容器仓库中push和pull，Docker是容器运行时其中一员，Docker可以创建容器进程，但Linux仍然是老大。"

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正如著名的"不必恐慌：Kubernetes和Docker"博客文章中所解释的那样，Kubernetes只是在v1.20版本后不推荐将Docker作为容器运行时使用。人们仍然可以使用Docker构建容器，继续在仓库中进行push和pull操作等。实际上是因为Docker并不符合Kubernetes的容器运行时接口标准(CRI)而不被推荐使用，Docker生成的镜像依然可以一如既往地在集群中工作。

简而言之，这就是我们想说的，这没什么大不了的，不必恐慌。

就像Dockershim Deprecation FAQ所说："在1.20中唯一改变的是，如果使用Docker作为容器运行时，则在kubelet启动时会打印一条警告信息。"

Dockershim中间件会一直保留到2021年末，直到发布Kubernetes 1.23版本为止。Kubernetes团队将与所有人紧密合作，直到所有人都准备好了相关变更，才会将dockershim放飞牧场。

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