KEP-4033keps/sig-node/4033-group-driver-detection-over-cri

Discover cgroup driver from CRI

implementedstablesig-nodelatest v1.371 open finding

KEP on GitHub kep.yaml Ask about this KEP

This enhancement adds the ability for the container runtime to instruct kubelet which cgroup driver to use. This removes the need for specifying cgroup driver in the kubelet configuration and eliminates the possibility of misaligned cgroup driver configuration between the kubelet and the runtime.

Facts

Authors: @haircommander @marquiz
Approvers: @mrunalp
Reviewers: @mrunalp
PRR approvers: @johnbelamaricalpha@johnbelamaricbeta@deads2kstable
Tracking issue: #4033(opens GitHub in a new tab) closedcompletedclosed 2025-10-03 22:38 UTCmilestone v1.34sig/nodestage/stable
Milestones: alpha v1.28beta v1.31stable v1.34
Participating SIGs: none
Feature gates: KubeletCgroupDriverFromCRI
Created / last updated: 2023-05-25 / none

Who decided each state, with the evidence.
Decided	Decision	Deciders	Evidence
2023-05-25 10:28 UTC	prr_approval johnbelamaric gave the production readiness approval for KEP-4033 at alpha on 2023-05-25.	@johnbelamaric prr_approver	Document 4033.yaml(opens GitHub in a new tab) Commit kubernetes/enhancements@20b49979e91f951151ce173b936157a1f32f0dcf(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4034 KEP-4033: Discover cgroup driver from CRI(opens GitHub in a new tab)
2023-06-15 12:30 UTC	prr_approval johnbelamaric gave the production readiness approval for KEP-4033 at beta on 2023-06-15.	@johnbelamaric prr_approver	Document 4033.yaml(opens GitHub in a new tab) Commit kubernetes/enhancements@b960476b878dbed842fe76bc4779ef0a8ce51cb9(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4034 KEP-4033: Discover cgroup driver from CRI(opens GitHub in a new tab)
2023-06-16 00:18 UTC	stage_graduation KEP-4033 set milestone.alpha to v1.28 in PR #4034, approved by johnbelamaric, mrunalp; merged by automation (k8s-ci-robot) on 2023-06-16.	@mrunalp approve_command @johnbelamaric approver @johnbelamaric approve_command @johnbelamaric lgtm @marquiz author @k8s-ci-robot merger	Commit kubernetes/enhancements@20b49979e91f951151ce173b936157a1f32f0dcf(opens GitHub in a new tab) StatusChange milestone.alpha ∅ → v1.28 (2023-05-25)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4034 KEP-4033: Discover cgroup driver from CRI
2023-06-16 00:18 UTC	stage_graduation KEP-4033 set milestone.alpha to v1.28 in PR #4034, approved by johnbelamaric, mrunalp; merged by automation (k8s-ci-robot) on 2023-06-16.	@mrunalp approve_command @johnbelamaric approver @johnbelamaric approve_command @johnbelamaric lgtm @marquiz author @k8s-ci-robot merger	Commit kubernetes/enhancements@caadc0f338a43eb603abb03462b64cbbc5adf320(opens GitHub in a new tab) StatusChange milestone.alpha ∅ → v1.28 (2023-06-15)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4034 KEP-4033: Discover cgroup driver from CRI
2023-06-16 00:18 UTC	stage_graduation KEP-4033 set milestone.beta to v1.28 in PR #4034, approved by johnbelamaric, mrunalp; merged by automation (k8s-ci-robot) on 2023-06-16.	@mrunalp approve_command @johnbelamaric approver @johnbelamaric approve_command @johnbelamaric lgtm @marquiz author @k8s-ci-robot merger	Commit kubernetes/enhancements@b960476b878dbed842fe76bc4779ef0a8ce51cb9(opens GitHub in a new tab) StatusChange milestone.beta ∅ → v1.28 (2023-06-15)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4034 KEP-4033: Discover cgroup driver from CRI
2023-06-16 00:18 UTC	stage_graduation KEP-4033 graduated to alpha in PR #4034, approved by johnbelamaric, mrunalp; merged by automation (k8s-ci-robot) on 2023-06-16.	@mrunalp approve_command @johnbelamaric approver @johnbelamaric approve_command @johnbelamaric lgtm @marquiz author @k8s-ci-robot merger	Commit kubernetes/enhancements@20b49979e91f951151ce173b936157a1f32f0dcf(opens GitHub in a new tab) StatusChange stage ∅ → alpha (2023-05-25)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4034 KEP-4033: Discover cgroup driver from CRI
2023-06-16 00:18 UTC	stage_graduation KEP-4033 graduated to beta from alpha in PR #4034, approved by johnbelamaric, mrunalp; merged by automation (k8s-ci-robot) on 2023-06-16.	@mrunalp approve_command @johnbelamaric approver @johnbelamaric approve_command @johnbelamaric lgtm @marquiz author @k8s-ci-robot merger	Commit kubernetes/enhancements@b960476b878dbed842fe76bc4779ef0a8ce51cb9(opens GitHub in a new tab) StatusChange stage alpha → beta (2023-06-15)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4034 KEP-4033: Discover cgroup driver from CRI
2023-06-16 00:18 UTC	status_transition KEP-4033 status set to implementable in PR #4034, approved by johnbelamaric, mrunalp; merged by automation (k8s-ci-robot) on 2023-06-16.	@mrunalp approve_command @johnbelamaric approver @johnbelamaric approve_command @johnbelamaric lgtm @marquiz author @k8s-ci-robot merger	Commit kubernetes/enhancements@20b49979e91f951151ce173b936157a1f32f0dcf(opens GitHub in a new tab) StatusChange status ∅ → implementable (2023-05-25)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4034 KEP-4033: Discover cgroup driver from CRI
2024-06-11 18:50 UTC	milestone_retarget KEP-4033 latest-milestone moved from v1.28 to v1.31 in PR #4682, approved by mrunalp; merged by automation (k8s-ci-robot) on 2024-06-11.	@mrunalp approver @mrunalp lgtm @haircommander author @johnbelamaric lgtm @ffromani lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@8b740c6bcaec4cb061f26f99c683aa58635336e3(opens GitHub in a new tab) StatusChange latest_milestone v1.28 → v1.31 (2024-05-31)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4682 KEP-4033: bump to beta(opens GitHub in a new tab)
2024-06-11 18:50 UTC	stage_graduation KEP-4033 set milestone.beta to v1.31 in PR #4682, approved by mrunalp; merged by automation (k8s-ci-robot) on 2024-06-11.	@mrunalp approver @mrunalp lgtm @haircommander author @johnbelamaric lgtm @ffromani lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@8b740c6bcaec4cb061f26f99c683aa58635336e3(opens GitHub in a new tab) StatusChange milestone.beta ∅ → v1.31 (2024-05-31)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4682 KEP-4033: bump to beta(opens GitHub in a new tab)
2024-09-23 21:04 UTC	stage_graduation KEP-4033 graduated to beta from alpha in PR #4769, approved by mrunalp; merged by automation (k8s-ci-robot) on 2024-09-23.	@mrunalp approver @haircommander author @dipesh-rawat lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@c4808ba407853dc272dca2e345bd883f5d109520(opens GitHub in a new tab) StatusChange stage alpha → beta (2024-07-18)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4769 KEP-4033: update metadata to reflect beta status(opens GitHub in a new tab) Review kubernetes/enhancements/pulls/reviews/2323297507
2025-06-04 09:34 UTC	prr_approval deads2k, johnbelamaric gave the production readiness approval for KEP-4033 at stable on 2025-06-04.	@johnbelamaric prr_approver @deads2k prr_approver	Document 4033.yaml(opens GitHub in a new tab) Commit kubernetes/enhancements@91267f2553e98afcb3ee1cdc65bf4a2f268cd4e5(opens GitHub in a new tab) PullRequest kubernetes/enhancements#5370 KEP-4033: graduate to GA(opens GitHub in a new tab)
2025-06-18 16:30 UTC	milestone_retarget KEP-4033 latest-milestone moved from v1.31 to v1.34 in PR #5370, approved by mrunalp, sergeykanzhelev, deads2k; merged by automation (k8s-ci-robot) on 2025-06-18.	@mrunalp approver @haircommander lgtm @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @deads2k approve_command @marquiz author @k8s-ci-robot merger	Commit kubernetes/enhancements@91267f2553e98afcb3ee1cdc65bf4a2f268cd4e5(opens GitHub in a new tab) StatusChange latest_milestone v1.31 → v1.34 (2025-06-04)
2025-06-18 16:30 UTC	stage_graduation KEP-4033 set milestone.stable to v1.34 in PR #5370, approved by mrunalp, sergeykanzhelev, deads2k; merged by automation (k8s-ci-robot) on 2025-06-18.	@mrunalp approver @haircommander lgtm @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @deads2k approve_command @marquiz author @k8s-ci-robot merger	Commit kubernetes/enhancements@91267f2553e98afcb3ee1cdc65bf4a2f268cd4e5(opens GitHub in a new tab) StatusChange milestone.stable ∅ → v1.34 (2025-06-04)(opens GitHub in a new tab)
2025-06-18 16:30 UTC	stage_graduation KEP-4033 graduated to stable from beta in PR #5370, approved by mrunalp, sergeykanzhelev, deads2k; merged by automation (k8s-ci-robot) on 2025-06-18.	@mrunalp approver @haircommander lgtm @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @deads2k approve_command @marquiz author @k8s-ci-robot merger	Commit kubernetes/enhancements@91267f2553e98afcb3ee1cdc65bf4a2f268cd4e5(opens GitHub in a new tab) StatusChange stage beta → stable (2025-06-04)(opens GitHub in a new tab)
2025-10-03 22:38 UTC	status_transition KEP-4033 status changed from implementable to implemented in PR #5601, approved by mrunalp, sergeykanzhelev; merged by automation (k8s-ci-robot) on 2025-10-03.	@mrunalp approver @haircommander author @sergeykanzhelev approver @sergeykanzhelev lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@602466c34871dcf12adc55af3889334a2c7766a1(opens GitHub in a new tab) StatusChange status implementable → implemented (2025-10-02)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#5601 KEP-4033: mark as implemented(opens GitHub in a new tab) Review
2026-02-10 16:28 UTC	milestone_retarget KEP-4033 latest-milestone moved from v1.34 to v1.36 in PR #5899, approved by mrunalp, sergeykanzhelev; merged by automation (k8s-ci-robot) on 2026-02-10.	@mrunalp approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @carlory author @k8s-ci-robot merger	Commit kubernetes/enhancements@676160a73e1c94479485f8b3e7577222c2cc7931(opens GitHub in a new tab) StatusChange latest_milestone v1.34 → v1.36 (2026-02-09)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#5899 KEP-4033: Update for v1.36 GA graduation(opens GitHub in a new tab) Review
2026-05-27 17:36 UTC	milestone_retarget KEP-4033 latest-milestone moved from v1.36 to v1.37 in PR #6087, approved by mrunalp; merged by automation (k8s-ci-robot) on 2026-05-27.	@mrunalp approver @mrunalp lgtm @carlory author @k8s-ci-robot merger	Commit kubernetes/enhancements@837b984fb21e6c755cdbbeac1812443bc08063b9(opens GitHub in a new tab) StatusChange latest_milestone v1.36 → v1.37 (2026-05-18)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#6087 KEP-4033: defer cgroup driver fallback removal to 1.38(opens GitHub in a new tab) Review kubernetes/enhancements/pulls/reviews/4374578306

Metadata, label and milestone changes, oldest first.Showing 1–10 of 53Rows

Status history
At	Kind	Field	Change	Actor	Evidence
2023-05-25 10:28 UTC	metadata	authors set	none → ["marquiz","haircommander"]	none	20b4997(opens GitHub in a new tab)PR #4034(opens GitHub in a new tab)
2023-05-25 10:28 UTC	metadata	latest_milestone set

Relationships as stored, Person → KEP, from kep.yaml(opens GitHub in a new tab)
Person	Relationship
@haircommander GitHub(opens GitHub in a new tab)	—AUTHORED→
@marquiz GitHub(opens GitHub in a new tab)	—AUTHORED→
@mrunalp GitHub(opens GitHub in a new tab)	—REVIEWS→
@mrunalp

How they connect

Shortest paths in the graph between this KEP and its SIG or one of its people, up to four hops.

Impact of change

Rows returned by the tool
Kep	Depth	Reached	By hop	Open pull requests	Hop	Feature gates	Sigs	People
{ "label": "KEP", "key": "keps/sig-node/4033-group-driver-detection-over-cri", "title": "Discover cgroup driver from CRI", "url": "https://github.com/kubernetes/enhancements/tree/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/keps/sig-node/4033-group-driver-detection-over-cri", "evidence_id": "ai7ebxv5pmvx", "number": 4033, "owning_sig": "sig-node", "status": "implemented", "stage": "stable", "latest_milestone": "v1.37", "milestone_alpha": "v1.28", "milestone_beta": "v1.31", "milestone_stable": "v1.34", "creation_date": "2023-05-25", "metadata_invalid": false }	2	5	{ "1": { "feature_gates": 1, "sigs": 1, "people": 3 } }	not in graph (merged pull requests only)	none	none	none	none
none	none	none	none	none	1	[ { "label": "FeatureGate", "key": "KubeletCgroupDriverFromCRI", "title": "KubeletCgroupDriverFromCRI", "url": "https://github.com/kubernetes/enhancements/blob/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/keps/sig-node/4033-group-driver-detection-over-cri/kep.yaml", "evidence_id": "yqzgsh55fq2g", "name": "KubeletCgroupDriverFromCRI" } ]	[ { "label": "SIG", "key": "sig-node", "title": "Node", "url": "https://github.com/kubernetes/community/tree/440e496d3a172234d81728df1bfe43849b589adf/sig-node", "evidence_id": "nrsuxu2xcxa7", "display_name": "Node", "sig_label": "node", "in_scope": true } ]	[ { "label": "Person", "key": "haircommander", "title": "haircommander", "url": "https://github.com/haircommander", "evidence_id": "so5ew2mhqcu2", "login": "haircommander", "is_bot": false }, { "label": "Person", "key": "marquiz", "title": "marquiz", "url": "https://github.com/marquiz", "evidence_id": "ttkp6vfqqj6e", "login": "marquiz", "is_bot": false }, { "label": "Person", "key": "mrunalp", "title": "mrunalp", "url": "https://github.com/mrunalp", "evidence_id": "oysq4hgp6yuk", "login": "mrunalp", "is_bot": false } ]

Rows returned by the tool
Kep	Depth	Reached	By hop	Open pull requests	Hop	Feature gates	Sigs	People
{ "label": "KEP", "key": "keps/sig-node/4033-group-driver-detection-over-cri", "title": "Discover cgroup driver from CRI", "url": "https://github.com/kubernetes/enhancements/tree/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/keps/sig-node/4033-group-driver-detection-over-cri", "evidence_id": "ai7ebxv5pmvx", "number": 4033, "owning_sig": "sig-node", "status": "implemented", "stage": "stable", "latest_milestone": "v1.37", "milestone_alpha": "v1.28", "milestone_beta": "v1.31", "milestone_stable": "v1.34", "creation_date": "2023-05-25", "metadata_invalid": false }	2	5	{ "1": { "feature_gates": 1, "sigs": 1, "people": 3 } }	not in graph (merged pull requests only)	none	none	none	none
none	none	none	none	none	1	[ { "label": "FeatureGate", "key": "KubeletCgroupDriverFromCRI", "title": "KubeletCgroupDriverFromCRI", "url": "https://github.com/kubernetes/enhancements/blob/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/keps/sig-node/4033-group-driver-detection-over-cri/kep.yaml", "evidence_id": "yqzgsh55fq2g", "name": "KubeletCgroupDriverFromCRI" } ]	[ { "label": "SIG", "key": "sig-node", "title": "Node", "url": "https://github.com/kubernetes/community/tree/440e496d3a172234d81728df1bfe43849b589adf/sig-node", "evidence_id": "nrsuxu2xcxa7", "display_name": "Node", "sig_label": "node", "in_scope": true } ]	[ { "label": "Person", "key": "haircommander", "title": "haircommander", "url": "https://github.com/haircommander", "evidence_id": "so5ew2mhqcu2", "login": "haircommander", "is_bot": false }, { "label": "Person", "key": "marquiz", "title": "marquiz", "url": "https://github.com/marquiz", "evidence_id": "ttkp6vfqqj6e", "login": "marquiz", "is_bot": false }, { "label": "Person", "key": "mrunalp", "title": "mrunalp", "url": "https://github.com/mrunalp", "evidence_id": "oysq4hgp6yuk", "login": "mrunalp", "is_bot": false } ]

Kep

Depth

Reached

By hop

Open pull requests

Hop

Feature gates

Sigs

People

{
  "label": "KEP",
  "key": "keps/sig-node/4033-group-driver-detection-over-cri",
  "title": "Discover cgroup driver from CRI",
  "url": "https://github.com/kubernetes/enhancements/tree/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/keps/sig-node/4033-group-driver-detection-over-cri",
  "evidence_id": "ai7ebxv5pmvx",
  "number": 4033,
  "owning_sig": "sig-node",
  "status": "implemented",
  "stage": "stable",
  "latest_milestone": "v1.37",
  "milestone_alpha": "v1.28",
  "milestone_beta": "v1.31",
  "milestone_stable": "v1.34",
  "creation_date": "2023-05-25",
  "metadata_invalid": false
}

{
  "1": {
    "feature_gates": 1,
    "sigs": 1,
    "people": 3
  }
}

not in graph (merged pull requests only)

[
  {
    "label": "FeatureGate",
    "key": "KubeletCgroupDriverFromCRI",
    "title": "KubeletCgroupDriverFromCRI",
    "url": "https://github.com/kubernetes/enhancements/blob/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/keps/sig-node/4033-group-driver-detection-over-cri/kep.yaml",
    "evidence_id": "yqzgsh55fq2g",
    "name": "KubeletCgroupDriverFromCRI"
  }
]

[
  {
    "label": "SIG",
    "key": "sig-node",
    "title": "Node",
    "url": "https://github.com/kubernetes/community/tree/440e496d3a172234d81728df1bfe43849b589adf/sig-node",
    "evidence_id": "nrsuxu2xcxa7",
    "display_name": "Node",
    "sig_label": "node",
    "in_scope": true
  }
]

[
  {
    "label": "Person",
    "key": "haircommander",
    "title": "haircommander",
    "url": "https://github.com/haircommander",
    "evidence_id": "so5ew2mhqcu2",
    "login": "haircommander",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "marquiz",
    "title": "marquiz",
    "url": "https://github.com/marquiz",
    "evidence_id": "ttkp6vfqqj6e",
    "login": "marquiz",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "mrunalp",
    "title": "mrunalp",
    "url": "https://github.com/mrunalp",
    "evidence_id": "oysq4hgp6yuk",
    "login": "mrunalp",
    "is_bot": false
  }
]

MATCH (k:KEP {key: $key}) RETURN k LIMIT 1 ; MATCH (k:KEP {key: $key}) MATCH path = (k)-[:REPLACES|SUPERSEDED_BY|SEE_ALSO|GATED_BY*1..2]-(n) WHERE n <> k AND (n:KEP OR n:FeatureGate) AND all(x IN nodes(path)[1..-1] WHERE x <> k AND (x:KEP OR (x:FeatureGate AND NOT x.key IN $placeholders))) WITH n, path ORDER BY length(path), [x IN nodes(path) | x.key] WITH n, collect(path)[0] AS path RETURN n AS node, length(path) AS hop, path ORDER BY hop, n.key LIMIT 150 ; UNWIND $keys AS kk MATCH (k:KEP {key: kk}) RETURN k.key AS kep, [(k)-[r_0:OWNED_BY]->(s_0:SIG) WHERE coalesce(r_0.valid_to, $open) = $open | s_0] AS sigs, [(p_1:Person)-[r_1:AUTHORED]->(k) WHERE coalesce(r_1.valid_to, $open) = $open AND coalesce(p_1.is_bot, false) = false | p_1] AS authors, [(p_2:Person)-[r_2:APPROVES]->(k) WHERE coalesce(r_2.valid_to, $open) = $open AND coalesce(p_2.is_bot, false) = false | p_2] AS approvers, [(k)-[r_3:TRACKED_BY]->(i_3:Issue) WHERE coalesce(r_3.valid_to, $open) = $open AND i_3.state = 'open' | i_3] AS open_issues LIMIT 200

Discover cgroup driver from CRI

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Impact of change

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