DiskPressure 使节点崩溃 [英] DiskPressure crashing the node

问题描述

DiskPressure 的真正含义是什么以及如何在容器创建过程中在 Kubernetes 中避免它?

What does DiskPressure really means and how it can be avoided in kubernetes during container creation?

似乎当我在一个节点上创建一个新容器时，很有可能由于压力而导致整个节点崩溃......

Seemingly when I creating a new container on a node there is a high chance that it is crashing the whole node because of the pressure...

推荐答案

来自 文档 您会发现 DiskPressure 在以下情况下会引发:

From the documentation you'll find that DiskPressure raises when:

节点的根文件系统或映像文件系统上的可用磁盘空间和 inode 已满足驱逐阈值

Available disk space and inodes on either the node’s root filesytem or image filesystem has satisfied an eviction threshold

在出现这些问题时了解节点的状况有些重要(还剩多少空间/inode，...)，了解相关的容器映像也很重要.这可以通过一些基本的系统监控来完成(请参阅资源使用监控).

Learning about the conditions of your nodes whenever these issues occur is somewhat important (how much space/inodes are left, ...) and also learning about the related container images is important. This can be done with some basic system monitoring (see the Resource Usage Monitoring).

了解条件后，您应该考虑调整--low-diskspace-threshold-mb、--image-gc-high-threshold 和--image-gc-low-threshold 你的参数 kubelet，以便始终有足够的空间用于正常操作，或者考虑为您的节点提供更多空间，具体取决于需求.

Once you know about the conditions, you should consider to adjust the --low-diskspace-threshold-mb, --image-gc-high-threshold and --image-gc-low-threshold parameters of you kubelet, so that there's always enough space for normal operation, or consider to provision more space for you nodes, depending on the requirements.

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