如何降低节点的DiskPressure条件阈值

Question

我想减少 DiskPressure 限制。阅读 Kubernetes documentation (also on this GitHub case) 后，我明白由于 nodefs.available<10% 我必须让我的音量 space 超过 10%。

我想将其更改为 5%，但我不知道如何更改。

我读了 and in the node condition by Kubernetes，他们提到这些标志 --eviction-hard 或 eviction-soft 可能是解决方案，但我应该在哪里更改它们？

我在工作节点上使用 Kubelet 配置文件：

root@worker:/# cat /var/lib/kubelet/config.yaml
apiVersion: kubelet.config.k8s.io/v1beta1
authentication:
  anonymous:
    enabled: true
  webhook:
    cacheTTL: 0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
  mode: AlwaysAllow
  #mode: Webhook
  webhook:
    cacheAuthorizedTTL: 0s
    cacheUnauthorizedTTL: 0s
readOnlyPort: 10255
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
cpuManagerReconcilePeriod: 0s
evictionPressureTransitionPeriod: 0s
fileCheckFrequency: 0s
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 0s
imageMinimumGCAge: 0s
kind: KubeletConfiguration
nodeStatusReportFrequency: 0s
nodeStatusUpdateFrequency: 0s
rotateCertificates: true
runtimeRequestTimeout: 0s
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 0s
syncFrequency: 0s
volumeStatsAggPeriod: 0s

我不明白我应该改变什么。大多数这些设置都是秒 (0s)。
如何降低门槛？

Answer 1

这曾经是 kubelet 命令行参数。
https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/

--eviction-hard mapStringString
A set of eviction thresholds (e.g. memory.available<1Gi) that if met would trigger a pod eviction.

DEPRECATED:
This parameter should be set via the config file specified by the Kubelet's --config flag.
See https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/ for more information.

现在它应该通过 kubelet 配置文件指定 - 你是对的:)
只需将所需的条目添加到您的配置中。

evictionHard:
  nodefs.available: 5%

配置架构。
https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/kubelet/config/v1beta1/types.go#L571

如何降低节点的DiskPressure条件阈值

How to reduce the DiskPressure condition threshold of a node

kubernetes

kubelet