[KEP-2400] [POC] [NOT FOR MERGE]: Swap-aware memory eviction with no additional APIs #129223
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This issue is currently awaiting triage. If a SIG or subproject determines this is a relevant issue, they will accept it by applying the The Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. |
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PR is not ready for review yet. /uncc @bobbypage @deads2k |
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This small refactor: - Adds swap log statistics. - Adds a post pressure validation function. - Adds a pre pods modification function. The later can be used in order to perform validation on the given pod right after a pressure condition is met, or to perform changes to pods before creation. Signed-off-by: Itamar Holder <[email protected]>
Signed-off-by: Itamar Holder <[email protected]>
Signed-off-by: Itamar Holder <[email protected]>
Turn swap on and off and sleep for a few seconds. This helps stabalize the tests which will start with a fresh unused swap space. Signed-off-by: Itamar Holder <[email protected]>
Signed-off-by: Itamar Holder <[email protected]>
Signed-off-by: Itamar Holder <[email protected]>
Accessible swap is the amount of swap that is accessible by Kubernetes pods, according to the LimitedSwap swap behavior. This PR treats accessible swap as an additional node memory capacity in the context of the eviction manager making memory signal observesations. Signed-off-by: Itamar Holder <[email protected]>
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This PR treats used swap memory as an additional memory usage in the context of the eviction manager ranking pods for eviction. In addition, a pod's accessible swap is considered as an additional memory request. Signed-off-by: Itamar Holder <[email protected]>
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What type of PR is this?
PR is still in a testing phase. Please do NOT review until it gets out of draft.
/kind feature
What this PR does / why we need it:
To be filled.
Which issue(s) this PR fixes:
Fixes #
Special notes for your reviewer:
Does this PR introduce a user-facing change?
Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.: