Enhancement Description

• Use filesystem quotas to monitor local ephemeral storage utilization
• Kubernetes Enhancement Proposal: 1029-ephemeral-storage-quotas
• Primary contact (assignee): @RobertKrawitz @pacoxu
• Responsible SIGs: SIG-Node
• Reviewer(s) - @dashpole @derekwaynecarr
• Approver: #derekwaynecarr @dchen1107
• Enhancement target (which target equals to which milestone):
  • Alpha release target (x.y): 1.15
  • Beta release target (x.y): 1.31 (User Namespace Support User Namespaces in pods #127 is beta in v1.30)
    • promoted in v1.25.0 and then reverted in v1.25.1
  • Stable release target (x.y): v1.33 or later
• Alpha
  • KEP (k/enhancements) update PR(s): Updates from SIG-Node meeting 20181204 #646
  • Code (k/k) update PR(s): Ephemeral storage monitoring via filesystem quotas kubernetes#66928
  • Docs (k/website) update(s): Add support for quotas for ephemeral storage monitoring. website#14268
• Reverted Beta (first-try: promoted in v1.25.0 and then reverted in v1.25.1)
  • KEP (k/enhancements) update PR(s): promote ephemeral-storage-quotas to beta in 1.25 #2697
  • Code (k/k) update PR(s):
    • promote LocalStorageCapacityIsolationFSQuotaMonitoring to beta kubernetes#107329
    • add VolumeStatCalDuration metrics for fsquato monitoring benchmark kubernetes#107201
    • assignQuota checks if the underlying medium supports quotas and if so setting it kubernetes#107302
    • add warning log if volume calculation took too long than 1 second kubernetes#107490
  • Docs(k/website) updates: Revert: promote LocalStorageCapacityIsolationFSQuotaMonitoring to beta website#36401
  • Revert PR: Revert "promote LocalStorageCapacityIsolationFSQuotaMonitoring to beta" kubernetes#112076, Changelog-1.25: add 1.25.0 known issues section kubernetes#112106, LocalStorageCapacityIsolationFSQuotaMonitoring revert to alpha for regression #3485
• Beta (second-try) 1.31
  • KEP (k/enhancements) update PR(s): [v1.29] ephemeral-storage-quotas: repromote to beta #3821
    • sig-node/1029-ephemeral-storage-quotas/*: #4699
  • Code (k/k) update PR(s):
    • Add CI for quota monitoring test-infra#28614
    • 1.27 fsquota: only generate pod uuid is nil kubernetes#112624
    • 1.27 kubelet: Fix fs quota monitoring on volumes kubernetes#115314
    • [pending UserNamespace beta]promote LocalStorageCapacityIsolationFSQuotaMonitoring to beta kubernetes#112626
    • [pending UserNamespace beta]promote LocalStorageCapacityIsolationFSQuotaMonitoring to beta kubernetes#112626 (comment) kernel @haircommander pointed out that it's in a user namespace it can't change the projid and if not, project ID could be changed. So we want to wait for User Namespace beta before promoting this to beta.
    • 1.31 pkg/volume/*: Enable quotas in user namespace kubernetes#126014
  • Docs (k/website) update(s):
    • [WIP] Update LocalStorageCapacityIsolationFSQuotaMonitoring to beta website#43455
    • Promote ephemeral storage quota to beta(1.31) website#46967