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cgroup v1 support is deprecated, change warning to error #59

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Oct 15, 2025
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cgroup v1 support is deprecated, change warning to error #59

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2 changes: 1 addition & 1 deletion validators/cgroup_validator_linux.go
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Original file line number Diff line number Diff line change
Expand Up @@ -114,7 +114,7 @@ func (c *CgroupsValidator) Validate(spec SysSpec) (warns, errs []error) {
requiredCgroupSpec = spec.CgroupsV2
optionalCgroupSpec = spec.CgroupsV2Optional
} else {
warns = append(warns, errors.New("cgroups v1 support is in maintenance mode, please migrate to cgroups v2"))
errs = append(errs, errors.New("cgroups v1 support is deprecated and will be removed in a future release. Please migrate to cgroups v2. To explicitly enable cgroups v1 support, you must set the kubelet configuration option 'FailCgroupV1' to 'false'. For more information see https://git.k8s.io/enhancements/keps/sig-node/5573-cgroup-v1-unsupported"))
subsystems, err = c.getCgroupV1Subsystems()
if err != nil {
return nil, []error{fmt.Errorf("failed to get cgroups v1 subsystems: %w", err)}
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