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52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
//go:build linux
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/*
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Copyright 2024 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kubelet
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import (
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"errors"
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"fmt"
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"os"
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"path/filepath"
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v1 "k8s.io/api/core/v1"
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"k8s.io/kubernetes/pkg/kubelet/cm"
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"k8s.io/kubernetes/pkg/kubelet/cm/util"
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"k8s.io/kubernetes/pkg/kubelet/events"
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"k8s.io/kubernetes/pkg/kubelet/metrics"
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)
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func (kl *Kubelet) cgroupVersionCheck() error {
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cgroupVersion := kl.containerManager.GetNodeConfig().CgroupVersion
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metrics.CgroupVersion.Set(float64(cgroupVersion))
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switch cgroupVersion {
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case 1:
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kl.recorder.Eventf(kl.nodeRef, v1.EventTypeWarning, events.CgroupV1, cm.CgroupV1MaintenanceModeWarning)
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return errors.New(cm.CgroupV1MaintenanceModeWarning)
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case 2:
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cpustat := filepath.Join(util.CgroupRoot, "cpu.stat")
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if _, err := os.Stat(cpustat); os.IsNotExist(err) {
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// if `/sys/fs/cgroup/cpu.stat` does not exist, log a warning
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return errors.New(cm.CgroupV2KernelWarning)
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}
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default:
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return fmt.Errorf("unsupported cgroup version: %d", cgroupVersion)
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}
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return nil
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}
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