kubernetes - "volumeDevices"与 "volumeMounts"与 k8s v1.13 有什么区别

Question

运行 kubectl explain pod.spec.containers 显示:

   volumeDevices    <[]Object>
     volumeDevices is the list of block devices to be used by the container.
     This is a beta feature.

   volumeMounts <[]Object>
     Pod volumes to mount into the container's filesystem. Cannot be updated.

这两个容器属性之间有关系吗？

注意 kubectl version 显示:

Client Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.0", GitCommit:"ddf47ac13c1a9483ea035a79cd7c10005ff21a6d", GitTreeState:"clean", BuildDate:"2018-12-03T21:04:45Z", GoVersion:"go1.11.2", Compiler:"gc", Platform:"linux/amd64"}

Server Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.0", GitCommit:"ddf47ac13c1a9483ea035a79cd7c10005ff21a6d", GitTreeState:"clean", BuildDate:"2018-12-03T20:56:12Z", GoVersion:"go1.11.2", Compiler:"gc", Platform:"linux/amd64"}

Answer 1

'volumeDevices' 是 1.13 中新测试版功能的一部分，它允许 pod 访问原始 block 卷而不是挂载的文件系统卷。这对于一些高级应用程序很有用，例如可能具有自己的文件系统格式的数据库。

可以找到官方文档here虽然它似乎还没有为 1.13 更新。