k8s.io/kubernetes@v1.29.3/pkg/kubelet/server/stats/summary_sys_containers.go (about) 1 //go:build !windows 2 // +build !windows 3 4 /* 5 Copyright 2018 The Kubernetes Authors. 6 7 Licensed under the Apache License, Version 2.0 (the "License"); 8 you may not use this file except in compliance with the License. 9 You may obtain a copy of the License at 10 11 http://www.apache.org/licenses/LICENSE-2.0 12 13 Unless required by applicable law or agreed to in writing, software 14 distributed under the License is distributed on an "AS IS" BASIS, 15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 See the License for the specific language governing permissions and 17 limitations under the License. 18 */ 19 20 package stats 21 22 import ( 23 "k8s.io/klog/v2" 24 25 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 26 statsapi "k8s.io/kubelet/pkg/apis/stats/v1alpha1" 27 "k8s.io/kubernetes/pkg/kubelet/cm" 28 ) 29 30 func (sp *summaryProviderImpl) GetSystemContainersStats(nodeConfig cm.NodeConfig, podStats []statsapi.PodStats, updateStats bool) (stats []statsapi.ContainerStats) { 31 systemContainers := map[string]struct { 32 name string 33 forceStatsUpdate bool 34 startTime metav1.Time 35 }{ 36 statsapi.SystemContainerKubelet: {name: nodeConfig.KubeletCgroupsName, forceStatsUpdate: false, startTime: sp.kubeletCreationTime}, 37 statsapi.SystemContainerRuntime: {name: nodeConfig.RuntimeCgroupsName, forceStatsUpdate: false}, 38 statsapi.SystemContainerMisc: {name: nodeConfig.SystemCgroupsName, forceStatsUpdate: false}, 39 statsapi.SystemContainerPods: {name: sp.provider.GetPodCgroupRoot(), forceStatsUpdate: updateStats}, 40 } 41 for sys, cont := range systemContainers { 42 // skip if cgroup name is undefined (not all system containers are required) 43 if cont.name == "" { 44 continue 45 } 46 s, _, err := sp.provider.GetCgroupStats(cont.name, cont.forceStatsUpdate) 47 if err != nil { 48 klog.ErrorS(err, "Failed to get system container stats", "containerName", cont.name) 49 continue 50 } 51 // System containers don't have a filesystem associated with them. 52 s.Logs, s.Rootfs = nil, nil 53 s.Name = sys 54 55 // if we know the start time of a system container, use that instead of the start time provided by cAdvisor 56 if !cont.startTime.IsZero() { 57 s.StartTime = cont.startTime 58 } 59 stats = append(stats, *s) 60 } 61 62 return stats 63 } 64 65 func (sp *summaryProviderImpl) GetSystemContainersCPUAndMemoryStats(nodeConfig cm.NodeConfig, podStats []statsapi.PodStats, updateStats bool) (stats []statsapi.ContainerStats) { 66 systemContainers := map[string]struct { 67 name string 68 forceStatsUpdate bool 69 startTime metav1.Time 70 }{ 71 statsapi.SystemContainerKubelet: {name: nodeConfig.KubeletCgroupsName, forceStatsUpdate: false, startTime: sp.kubeletCreationTime}, 72 statsapi.SystemContainerRuntime: {name: nodeConfig.RuntimeCgroupsName, forceStatsUpdate: false}, 73 statsapi.SystemContainerMisc: {name: nodeConfig.SystemCgroupsName, forceStatsUpdate: false}, 74 statsapi.SystemContainerPods: {name: sp.provider.GetPodCgroupRoot(), forceStatsUpdate: updateStats}, 75 } 76 for sys, cont := range systemContainers { 77 // skip if cgroup name is undefined (not all system containers are required) 78 if cont.name == "" { 79 continue 80 } 81 s, err := sp.provider.GetCgroupCPUAndMemoryStats(cont.name, cont.forceStatsUpdate) 82 if err != nil { 83 klog.ErrorS(err, "Failed to get system container stats", "containerName", cont.name) 84 continue 85 } 86 s.Name = sys 87 88 // if we know the start time of a system container, use that instead of the start time provided by cAdvisor 89 if !cont.startTime.IsZero() { 90 s.StartTime = cont.startTime 91 } 92 stats = append(stats, *s) 93 } 94 95 return stats 96 }