KEP-4569keps/sig-node/4569-cgroup-v1-maintenance-mode

Move cgroup v1 in maintenance mode

implementedstablesig-nodelatest v1.31

KEP on GitHub kep.yaml Ask about this KEP

Move cgroup v1 support in Kubernetes into maintenance mode, aligning with the industry's move towards cgroup v2 as the default for Linux kernel resource management and isolation.

Facts

Authors: @harche
Approvers: @dchen1107 @derekwaynecarr
Reviewers: @mrunalp @sergeykanzhelev @yujuhong
PRR approvers: @deads2kstable
Tracking issue: #4569(opens GitHub in a new tab) closedcompletedclosed 2025-01-20 14:18 UTCsig/nodestage/stable
Milestones: alpha v1.31beta v1.31stable v1.31
Participating SIGs: none
Feature gates: none
Created / last updated: 2024-04-04 / none

Who decided each state, with the evidence.
Decided	Decision	Deciders	Evidence
2024-04-05 16:30 UTC	prr_approval deads2k gave the production readiness approval for KEP-4569 at stable on 2024-04-05.	@deads2k prr_approver	Document 4569.yaml(opens GitHub in a new tab)
2024-06-03 17:40 UTC	stage_graduation KEP-4569 set milestone.alpha to v1.31 in PR #4572, approved by mrunalp, sergeykanzhelev, deads2k; merged by automation (k8s-ci-robot) on 2024-06-03.	@mrunalp approver @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @deads2k approve_command @rphillips lgtm @harche author @yujuhong lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@94c911bc21326668add77dc7a440bf91475d4124(opens GitHub in a new tab) StatusChange milestone.alpha ∅ → v1.31 (2024-04-05)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4572 Move cgroup v1 support into maintenance mode(opens GitHub in a new tab) Review kubernetes/enhancements/pulls/reviews/2091594344(opens GitHub in a new tab) Review kubernetes/enhancements/pulls/reviews/2089384817(opens GitHub in a new tab) Comment kubernetes/enhancements/issues/comments/2145756461(opens GitHub in a new tab) Comment kubernetes/enhancements/issues/comments/2145736008
2024-06-03 17:40 UTC	stage_graduation KEP-4569 set milestone.beta to v1.31 in PR #4572, approved by mrunalp, sergeykanzhelev, deads2k; merged by automation (k8s-ci-robot) on 2024-06-03.	@mrunalp approver @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @deads2k approve_command @rphillips lgtm @harche author @yujuhong lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@94c911bc21326668add77dc7a440bf91475d4124(opens GitHub in a new tab) StatusChange milestone.beta ∅ → v1.31 (2024-04-05)
2024-06-03 17:40 UTC	stage_graduation KEP-4569 set milestone.stable to v1.31 in PR #4572, approved by mrunalp, sergeykanzhelev, deads2k; merged by automation (k8s-ci-robot) on 2024-06-03.	@mrunalp approver @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @deads2k approve_command @rphillips lgtm @harche author @yujuhong lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@94c911bc21326668add77dc7a440bf91475d4124(opens GitHub in a new tab) StatusChange milestone.stable ∅ → v1.31 (2024-04-05)
2024-06-03 17:40 UTC	stage_graduation KEP-4569 graduated to stable in PR #4572, approved by mrunalp, sergeykanzhelev, deads2k; merged by automation (k8s-ci-robot) on 2024-06-03.	@mrunalp approver @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @deads2k approve_command @rphillips lgtm @harche author @yujuhong lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@94c911bc21326668add77dc7a440bf91475d4124(opens GitHub in a new tab) StatusChange stage ∅ → stable (2024-04-05)
2024-06-03 17:40 UTC	status_transition KEP-4569 status set to implementable in PR #4572, approved by mrunalp, sergeykanzhelev, deads2k; merged by automation (k8s-ci-robot) on 2024-06-03.	@mrunalp approver @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @deads2k approve_command @rphillips lgtm @harche author @yujuhong lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@94c911bc21326668add77dc7a440bf91475d4124(opens GitHub in a new tab) StatusChange status ∅ → implementable (2024-04-05)
2024-09-19 15:31 UTC	status_transition KEP-4569 status changed from implementable to implemented in PR #4823, approved by mrunalp; merged by automation (k8s-ci-robot) on 2024-09-19.	@kannon92 author @mrunalp approver @mrunalp lgtm @bart0sh lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@ebcc400f9234ae360b9d8a9aeb802f9beb93d955(opens GitHub in a new tab) StatusChange status implementable → implemented (2024-09-04)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#4823 KEP-4569: mark as implemented(opens GitHub in a new tab) Review kubernetes/enhancements/pulls/reviews/2315884397

Metadata, label and milestone changes, oldest first.Showing 1–10 of 28Rows

Status history
At	Kind	Field	Change	Actor	Evidence
2024-04-04 19:25 UTC	label	needs-sig added	none → needs-sig	@k8s-ci-robot	source(opens GitHub in a new tab)
2024-04-04 19:27 UTC	label	sig/node added	none → sig/node	@k8s-ci-robot	source

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

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	Keps	Sigs	People	Open issues
{ "label": "KEP", "key": "keps/sig-node/4569-cgroup-v1-maintenance-mode", "title": "Move cgroup v1 in maintenance mode", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/4569-cgroup-v1-maintenance-mode", "evidence_id": "7pimudvuatdv", "number": 4569, "owning_sig": "sig-node", "status": "implemented", "stage": "stable", "latest_milestone": "v1.31", "milestone_alpha": "v1.31", "milestone_beta": "v1.31", "milestone_stable": "v1.31", "creation_date": "2024-04-04", "metadata_invalid": false }	2	8	{ "1": { "keps": 1, "sigs": 1, "people": 3 }, "2": { "people": 2, "open_issues": 1 } }	not in graph (merged pull requests only)	none	none	none	none	none
none	none	none	none	none	1	[ { "label": "KEP", "key": "keps/sig-node/5573-remove-cgroup-v1", "title": "Remove cgroup v1 support", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/5573-remove-cgroup-v1", "evidence_id": "3jiiteaoyws3", "number": 5573, "owning_sig": "sig-node", "status": "implementable", "stage": "beta", "latest_milestone": "v1.35", "milestone_beta": "v1.35", "creation_date": "2025-09-26", "metadata_invalid": false } ]	[ { "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": "harche", "title": "harche", "url": "https://github.com/harche", "evidence_id": "vke6cmz5p6o4", "login": "harche", "is_bot": false }, { "label": "Person", "key": "dchen1107", "title": "dchen1107", "url": "https://github.com/dchen1107", "evidence_id": "frhgjvzxlrsh", "login": "dchen1107", "is_bot": false }, { "label": "Person", "key": "derekwaynecarr", "title": "derekwaynecarr", "url": "https://github.com/derekwaynecarr", "evidence_id": "wpnbg5qnq5fl", "login": "derekwaynecarr", "is_bot": false } ]	none
none	none	none	none	none	2	none	none	[ { "label": "Person", "key": "kannon92", "title": "kannon92", "url": "https://github.com/kannon92", "evidence_id": "uquxrucuu6oj", "login": "kannon92", "is_bot": false }, { "label": "Person", "key": "mrunalp", "title": "mrunalp", "url": "https://github.com/mrunalp", "evidence_id": "oysq4hgp6yuk", "login": "mrunalp", "is_bot": false } ]	[ { "label": "Issue", "key": "kubernetes/enhancements#5573", "title": "Remove cgroup v1 support", "url": "https://github.com/kubernetes/enhancements/issues/5573", "evidence_id": "aya7fgpanin6", "number": 5573, "state": "open", "created_at_iso": "2025-09-26T13:47:20Z", "labels_current": [ "sig/node", "stage/beta", "kind/kep" ], "is_tracking_issue": true } ]

Rows returned by the tool
Kep	Depth	Reached	By hop	Open pull requests	Hop	Keps	Sigs	People	Open issues
{ "label": "KEP", "key": "keps/sig-node/4569-cgroup-v1-maintenance-mode", "title": "Move cgroup v1 in maintenance mode", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/4569-cgroup-v1-maintenance-mode", "evidence_id": "7pimudvuatdv", "number": 4569, "owning_sig": "sig-node", "status": "implemented", "stage": "stable", "latest_milestone": "v1.31", "milestone_alpha": "v1.31", "milestone_beta": "v1.31", "milestone_stable": "v1.31", "creation_date": "2024-04-04", "metadata_invalid": false }	2	8	{ "1": { "keps": 1, "sigs": 1, "people": 3 }, "2": { "people": 2, "open_issues": 1 } }	not in graph (merged pull requests only)	none	none	none	none	none
none	none	none	none	none	1	[ { "label": "KEP", "key": "keps/sig-node/5573-remove-cgroup-v1", "title": "Remove cgroup v1 support", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/5573-remove-cgroup-v1", "evidence_id": "3jiiteaoyws3", "number": 5573, "owning_sig": "sig-node", "status": "implementable", "stage": "beta", "latest_milestone": "v1.35", "milestone_beta": "v1.35", "creation_date": "2025-09-26", "metadata_invalid": false } ]	[ { "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": "harche", "title": "harche", "url": "https://github.com/harche", "evidence_id": "vke6cmz5p6o4", "login": "harche", "is_bot": false }, { "label": "Person", "key": "dchen1107", "title": "dchen1107", "url": "https://github.com/dchen1107", "evidence_id": "frhgjvzxlrsh", "login": "dchen1107", "is_bot": false }, { "label": "Person", "key": "derekwaynecarr", "title": "derekwaynecarr", "url": "https://github.com/derekwaynecarr", "evidence_id": "wpnbg5qnq5fl", "login": "derekwaynecarr", "is_bot": false } ]	none
none	none	none	none	none	2	none	none	[ { "label": "Person", "key": "kannon92", "title": "kannon92", "url": "https://github.com/kannon92", "evidence_id": "uquxrucuu6oj", "login": "kannon92", "is_bot": false }, { "label": "Person", "key": "mrunalp", "title": "mrunalp", "url": "https://github.com/mrunalp", "evidence_id": "oysq4hgp6yuk", "login": "mrunalp", "is_bot": false } ]	[ { "label": "Issue", "key": "kubernetes/enhancements#5573", "title": "Remove cgroup v1 support", "url": "https://github.com/kubernetes/enhancements/issues/5573", "evidence_id": "aya7fgpanin6", "number": 5573, "state": "open", "created_at_iso": "2025-09-26T13:47:20Z", "labels_current": [ "sig/node", "stage/beta", "kind/kep" ], "is_tracking_issue": true } ]

Kep

Depth

Reached

By hop

Open pull requests

Hop

Keps

Sigs

People

Open issues

{
  "label": "KEP",
  "key": "keps/sig-node/4569-cgroup-v1-maintenance-mode",
  "title": "Move cgroup v1 in maintenance mode",
  "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/4569-cgroup-v1-maintenance-mode",
  "evidence_id": "7pimudvuatdv",
  "number": 4569,
  "owning_sig": "sig-node",
  "status": "implemented",
  "stage": "stable",
  "latest_milestone": "v1.31",
  "milestone_alpha": "v1.31",
  "milestone_beta": "v1.31",
  "milestone_stable": "v1.31",
  "creation_date": "2024-04-04",
  "metadata_invalid": false
}

{
  "1": {
    "keps": 1,
    "sigs": 1,
    "people": 3
  },
  "2": {
    "people": 2,
    "open_issues": 1
  }
}

not in graph (merged pull requests only)

[
  {
    "label": "KEP",
    "key": "keps/sig-node/5573-remove-cgroup-v1",
    "title": "Remove cgroup v1 support",
    "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/5573-remove-cgroup-v1",
    "evidence_id": "3jiiteaoyws3",
    "number": 5573,
    "owning_sig": "sig-node",
    "status": "implementable",
    "stage": "beta",
    "latest_milestone": "v1.35",
    "milestone_beta": "v1.35",
    "creation_date": "2025-09-26",
    "metadata_invalid": false
  }
]

[
  {
    "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": "harche",
    "title": "harche",
    "url": "https://github.com/harche",
    "evidence_id": "vke6cmz5p6o4",
    "login": "harche",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "dchen1107",
    "title": "dchen1107",
    "url": "https://github.com/dchen1107",
    "evidence_id": "frhgjvzxlrsh",
    "login": "dchen1107",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "derekwaynecarr",
    "title": "derekwaynecarr",
    "url": "https://github.com/derekwaynecarr",
    "evidence_id": "wpnbg5qnq5fl",
    "login": "derekwaynecarr",
    "is_bot": false
  }
]

[
  {
    "label": "Person",
    "key": "kannon92",
    "title": "kannon92",
    "url": "https://github.com/kannon92",
    "evidence_id": "uquxrucuu6oj",
    "login": "kannon92",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "mrunalp",
    "title": "mrunalp",
    "url": "https://github.com/mrunalp",
    "evidence_id": "oysq4hgp6yuk",
    "login": "mrunalp",
    "is_bot": false
  }
]

[
  {
    "label": "Issue",
    "key": "kubernetes/enhancements#5573",
    "title": "Remove cgroup v1 support",
    "url": "https://github.com/kubernetes/enhancements/issues/5573",
    "evidence_id": "aya7fgpanin6",
    "number": 5573,
    "state": "open",
    "created_at_iso": "2025-09-26T13:47:20Z",
    "labels_current": [
      "sig/node",
      "stage/beta",
      "kind/kep"
    ],
    "is_tracking_issue": true
  }
]

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

Move cgroup v1 in maintenance mode

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How they connect

Impact of change

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