KEP-5573keps/sig-node/5573-remove-cgroup-v1

Remove cgroup v1 support

implementablebetasig-nodelatest v1.35

KEP on GitHub kep.yaml Ask about this KEP

Remove cgroup v1 support from Kubernetes codebase, building upon the maintenance mode introduced in KEP-4569. This KEP will have a phased approach where beta will prevent kubelet from starting on a cgroup v1 node. We will commit to removing cgroup v1 code but there is not yet a timeline for removal. The removal will be done no earlier than 1.38 to maintain… Full summary

Facts

Authors: @kannon92
Approvers: @dchen1107 @mrunalp
Reviewers: @sergeykanzhelev @bentheelder @yujuhong
PRR approvers: @deads2kbeta
Tracking issue: #5573(opens GitHub in a new tab) opensig/nodestage/betakind/kep
Milestones: beta v1.35
Participating SIGs: none
Feature gates: none
Created / last updated: 2025-09-26 / none

Who decided each state, with the evidence.
Decided	Decision	Deciders	Evidence
2025-09-26 14:06 UTC	prr_approval deads2k gave the production readiness approval for KEP-5573 at beta on 2025-09-26.	@deads2k prr_approver	Document 5573.yaml(opens GitHub in a new tab)
2025-10-09 20:05 UTC	stage_graduation KEP-5573 set milestone.beta to v1.35 in PR #5574, approved by sergeykanzhelev, dchen1107, deads2k; merged by automation (k8s-ci-robot) on 2025-10-09.	@kannon92 author @dchen1107 approve_command @dchen1107 lgtm @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @pacoxu lgtm @deads2k approve_command @k8s-ci-robot merger	Commit kubernetes/enhancements@23c6068ad5e91d341c2c4d714e2f408c02c6b9fd(opens GitHub in a new tab) StatusChange milestone.beta ∅ → v1.35 (2025-09-26)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#5574 [KEP-5573]: Remove cgroup v1 support(opens GitHub in a new tab) Review kubernetes/enhancements/pulls/reviews/3317563538(opens GitHub in a new tab) Review kubernetes/enhancements/pulls/reviews/3307392431(opens GitHub in a new tab) Comment kubernetes/enhancements/issues/comments/3387310255(opens GitHub in a new tab) Comment kubernetes/enhancements/issues/comments/3387136124
2025-10-09 20:05 UTC	stage_graduation KEP-5573 graduated to beta in PR #5574, approved by sergeykanzhelev, dchen1107, deads2k; merged by automation (k8s-ci-robot) on 2025-10-09.	@kannon92 author @dchen1107 approve_command @dchen1107 lgtm @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @pacoxu lgtm @deads2k approve_command @k8s-ci-robot merger	Commit kubernetes/enhancements@23c6068ad5e91d341c2c4d714e2f408c02c6b9fd(opens GitHub in a new tab) StatusChange stage ∅ → beta (2025-09-26)
2025-10-09 20:05 UTC	status_transition KEP-5573 status set to implementable in PR #5574, approved by sergeykanzhelev, dchen1107, deads2k; merged by automation (k8s-ci-robot) on 2025-10-09.	@kannon92 author @dchen1107 approve_command @dchen1107 lgtm @sergeykanzhelev approver @sergeykanzhelev approve_command @sergeykanzhelev lgtm @pacoxu lgtm @deads2k approve_command @k8s-ci-robot merger	Commit kubernetes/enhancements@23c6068ad5e91d341c2c4d714e2f408c02c6b9fd(opens GitHub in a new tab) StatusChange status ∅ → implementable (2025-09-26)

Metadata, label and milestone changes, oldest first.Showing 1–10 of 20Rows

Status history
At	Kind	Field	Change	Actor	Evidence
2025-09-26 13:47 UTC	label	needs-sig added	none → needs-sig	@k8s-ci-robot	source(opens GitHub in a new tab)
2025-09-26 13:49 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
@kannon92 GitHub(opens GitHub in a new tab)	—AUTHORED→
@sergeykanzhelev GitHub(opens GitHub in a new tab)	—REVIEWS→
@bentheelder GitHub(opens GitHub in a new tab)	—REVIEWS→
@yujuhong

2 nodes · 1 relations

KEP 2

Relations and who declared them
Relation	KEP	Status	Declared by
see also	KEP-4569 Move cgroup v1 in maintenance mode	implemented	none

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/5573-remove-cgroup-v1", "title": "Remove cgroup v1 support", "url": "https://github.com/kubernetes/enhancements/tree/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/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 }	2	8	{ "1": { "keps": 1, "sigs": 1, "people": 3, "open_issues": 1 }, "2": { "people": 2 } }	not in graph (merged pull requests only)	none	none	none	none	none
none	none	none	none	none	1	[ { "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/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/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 } ]	[ { "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": "kannon92", "title": "kannon92", "url": "https://github.com/kannon92", "evidence_id": "uquxrucuu6oj", "login": "kannon92", "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": "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 } ]
none	none	none	none	none	2	none	none	[ { "label": "Person", "key": "harche", "title": "harche", "url": "https://github.com/harche", "evidence_id": "vke6cmz5p6o4", "login": "harche", "is_bot": false }, { "label": "Person", "key": "derekwaynecarr", "title": "derekwaynecarr", "url": "https://github.com/derekwaynecarr", "evidence_id": "wpnbg5qnq5fl", "login": "derekwaynecarr", "is_bot": false } ]	none

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/5573-remove-cgroup-v1", "title": "Remove cgroup v1 support", "url": "https://github.com/kubernetes/enhancements/tree/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/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 }	2	8	{ "1": { "keps": 1, "sigs": 1, "people": 3, "open_issues": 1 }, "2": { "people": 2 } }	not in graph (merged pull requests only)	none	none	none	none	none
none	none	none	none	none	1	[ { "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/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/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 } ]	[ { "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": "kannon92", "title": "kannon92", "url": "https://github.com/kannon92", "evidence_id": "uquxrucuu6oj", "login": "kannon92", "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": "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 } ]
none	none	none	none	none	2	none	none	[ { "label": "Person", "key": "harche", "title": "harche", "url": "https://github.com/harche", "evidence_id": "vke6cmz5p6o4", "login": "harche", "is_bot": false }, { "label": "Person", "key": "derekwaynecarr", "title": "derekwaynecarr", "url": "https://github.com/derekwaynecarr", "evidence_id": "wpnbg5qnq5fl", "login": "derekwaynecarr", "is_bot": false } ]	none

Kep

Depth

Reached

By hop

Open pull requests

Hop

Keps

Sigs

People

Open issues

{
  "label": "KEP",
  "key": "keps/sig-node/5573-remove-cgroup-v1",
  "title": "Remove cgroup v1 support",
  "url": "https://github.com/kubernetes/enhancements/tree/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/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
}

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

not in graph (merged pull requests only)

[
  {
    "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/6ebe0a94771723b3f27cb4a757f0cc22f29e38a2/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
  }
]

[
  {
    "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": "kannon92",
    "title": "kannon92",
    "url": "https://github.com/kannon92",
    "evidence_id": "uquxrucuu6oj",
    "login": "kannon92",
    "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": "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
  }
]

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

Remove cgroup v1 support

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