mirror of https://github.com/k3s-io/k3s
270ed995f4
Automatic merge from submit-queue (batch tested with PRs 59683, 59964, 59841, 59936, 59686). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Reevaluate eviction thresholds after reclaim functions **What this PR does / why we need it**: When the node comes under `DiskPressure` due to inodes or disk space, the eviction manager runs garbage collection functions to clean up dead containers and unused images. Currently, we use the strategy of trying to measure the disk space and inodes freed by garbage collection. However, as #46789 and #56573 point out, there are gaps in the implementation that can cause extra evictions even when they are not required. Furthermore, for nodes which frequently cycle through images, it results in a large number of evictions, as running out of inodes always causes an eviction. This PR changes this strategy to call the garbage collection functions and ignore the results. Then, it triggers another collection of node-level metrics, and sees if the node is still under DiskPressure. This way, we can simply observe the decrease in disk or inode usage, rather than trying to measure how much is freed. **Which issue(s) this PR fixes**: Fixes #46789 Fixes #56573 Related PR #56575 **Special notes for your reviewer**: This will look cleaner after #57802 removes arguments from [makeSignalObservations](https://github.com/kubernetes/kubernetes/pull/57802/files#diff-9e5246d8c78d50ce4ba440f98663f3e9R719). **Release note**: ```release-note NONE ``` /sig node /kind bug /priority important-soon cc @kubernetes/sig-node-pr-reviews |
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