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Automatic merge from submit-queue. 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>. Clean up kubelet eviction events **What this PR does / why we need it**: This makes eviction events better. * Exceeding container disk limits no longer says "node was low on X", since the node isn't actually low on a resource. The container limit was just exceeded. Same for pods and volumes. * Eviction message now lists containers which were exceeding their requests. This is an event from a container evicted while under memory pressure: `reason: 'Evicted' The node was low on resource: memory. Container high-priority-memory-hog was using 166088Ki, which exceeds its request of 10Mi.` * Eviction messages now displays real resources, when they exist. Rather than `The node was low on resource: nodefs`, it will now show `The node was low on resource: ephemeral-storage`. This also cleans up eviction code in order to accomplish this. We previously had a resource for each signal: e.g. `SignalNodeFsAvailable` mapped to the resource`nodefs`, and `nodefs` maps to reclaim functions, and ranking functions. Now, signals map directly to reclaim and ranking functions, and signals map to real resources: e.g. `SignalNodeFsAvailable` maps to the resource `ephemeral-storage`, which is what we use in events. This also cleans up duplicated code by reusing the `evictPod` function. It also removes the unused signal `SignalAllocatableNodeFsAvailable`. **Release note**: ```release-note NONE ``` /sig node /priority important-longterm /assign @dchen1107 @jingxu97 |
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Kubernetes
Kubernetes is an open source system for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications.
Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.
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