Health check - does it even work?

Rancher 2.x
11

@vincent Do you have any insight on how to change the following values for the cluster?

  • kubelet: node-status-update-frequency
  • controller-manager: node-monitor-period
  • controller-manager: node-monitor-grace-period
  • controller-manager: pod-eviction-timeout

I tried creating a new cluster and editing the YAML file before starting it. I added:

services:
  kublet:
    extra_args:
      node-status-update-frequency: "5s"
  kube-controller:
    extra_args:
      node-monitor-period: "2s"
      node-monitor-grace-period: "16s"
      pod-eviction-timeout: "30s"

After the cluster creation, these changes disappeared from the cluster config in YAML except for node-status-update-frequency. So this did not result in marking the node as unhealthy faster when I killed it. And the pods were re-created only 5 minutes after it was detected as unhealthy.

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