「连载」边缘计算(十八)02-21:边缘部分源码(源码分析篇)

(接上篇)

|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| k8s.io/Kubernetes/pkg/Kubelet/dockershim/docker_service.go |
| // NewdockerService creates a new `dockerService` struct. // NOTE: Anything passed to dockerService should be eventually handled in another way when we switch to running the shim as a different process. func NewdockerService(config *ClientConfig, podSandboxImage string, streamingConfig *streaming.Config, pluginSettings *NetworkPluginSettings, cgroupsName string, kubeCgroupDriver string, dockershimRootDir string, startLocalStreamingServer bool) (dockerService, error) { ... ds := &dockerService{ client: c, os: kubecontainer.RealOS{}, podSandboxImage: podSandboxImage, streamingRuntime: &streamingRuntime{ client: client, execHandler: &NativeExecHandler{}, }, containerManager: cm.NewContainerManager(cgroupsName, client), checkpointManager: checkpointManager, startLocalStreamingServer: startLocalStreamingServer, networkReady: make(map[string]bool), containerCleanupInfos: make(map[string]*containerCleanupInfo), } ... } |

从 NewdockerService()函数可以看出,dockershim的真身是dockerService struct。dockerService struct定义具体如下所示。

|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| k8s.io/Kubernetes/pkg/Kubelet/dockershim/docker_service.go |
| type dockerService struct { client libdocker.Interface os kubecontainer.OSInterface podSandboxImage string streamingRuntime *streamingRuntime streamingServer streaming.Server network *network.PluginManager // Map of podSandboxID :: network-is-ready networkReady map[string]bool networkReadyLock sync.Mutex containerManager cm.ContainerManager // cgroup driver used by docker runtime. cgroupDriver string checkpointManager checkpointmanager.CheckpointManager // caches the version of the runtime. // To be compatible with multiple docker versions, we need to perform // version checking for some operations. Use this cache to avoid querying // the docker daemon every time we need to do such checks. versionCache *cache.ObjectCache // startLocalStreamingServer indicates whether dockershim should start a // streaming server on localhost. startLocalStreamingServer bool // containerCleanupInfos maps container IDs to the `containerCleanupInfo` structs // needed to clean up after containers have been started or removed. // (see `applyPlatformSpecificdockerConfig` and `performPlatformSpecificContainerCleanup` // methods for more info). containerCleanupInfos map[string]*containerCleanupInfo } |

从dockerService的定义可以看出,大部分属性都是与container、pod、image相关的。我们从这些属性可以推测dockerService是与container runtime交互的一个组件。为了进一步验证猜想,可以在同一个文件中(k8s.io/Kubernetes/pkg/Kubelet/dockershim/docker_service.go)查看dockerService实现的方法。

以上只是剖析了edged的初始化过程。下面剖析edged的启动过程,具体如下所示。

|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| KubeEdge/edge/pkg/edged/edged.go |
| func (e *edged) Start(c *context.Context) { e.context = c e.metaClient = client.New(c) // use self defined client to replace fake kube client e.kubeClient = fakekube.NewSimpleClientset(e.metaClient) e.statusManager = status.NewManager(e.kubeClient, e.podManager, utilpod.NewpodDeleteSafety(), e.metaClient) if err := e.initializeModules(); err != nil { klog.Errorf("initialize module error: %v", err) os.Exit(1) } e.volumeManager = volumemanager.NewVolumeManager( ... ) go e.volumeManager.Run(edgedutil.NewSourcesReady(), utilwait.NeverStop) go utilwait.Until(e.syncNodeStatus, e.nodeStatusUpdateFrequency, utilwait.NeverStop) e.probeManager = prober.NewManager(e.statusManager, e.livenessManager, containers.NewContainerRunner(), kubecontainer.NewRefManager(), record.NewEventRecorder()) e.pleg = edgepleg.NewGenericLifecycleRemote(e.containerRuntime, e.probeManager, plegChannelCapacity, plegRelistPeriod, e.podManager, e.statusManager, e.podCache, clock.RealClock{}, e.interfaceName) e.statusManager.Start() e.pleg.Start() e.podAddWorkerRun(concurrentConsumers) e.podRemoveWorkerRun(concurrentConsumers) housekeepingTicker := time.NewTicker(housekeepingPeriod) syncWorkQueueCh := time.NewTicker(syncWorkQueuePeriod) e.probeManager.Start() go e.syncLoopIteration(e.pleg.Watch(), housekeepingTicker.C, syncWorkQueueCh.C) go e.server.ListenAndServe() e.imageGCManager.Start() e.StartGarbageCollection() e.pluginManager = pluginmanager.NewPluginManager( ... ) // Adding Registration Callback function for CSI Driver e.pluginManager.AddHandler(pluginwatcherapi.CSIPlugin, plugincache.PluginHandler(csiplugin.PluginHandler)) // Start the plugin manager go e.pluginManager.Run(edgedutil.NewSourcesReady(), utilwait.NeverStop) e.syncpod() } |

未完待续......

相关推荐
云空3 分钟前
《探索电脑麦克风声音采集多窗口实时可视化技术》
人工智能·python·算法
麦兜*7 分钟前
【Spring Boot】Spring Boot 4.0 的颠覆性AI特性全景解析,结合智能编码实战案例、底层架构革新及Prompt工程手册
java·人工智能·spring boot·后端·spring·架构
张较瘦_10 分钟前
[论文阅读] 人工智能 | 5C提示词框架的研究
论文阅读·人工智能
超龄超能程序猿24 分钟前
使用 Python 对本地图片进行图像分类
开发语言·人工智能·python·机器学习·分类·数据挖掘·scipy
大千AI助手27 分钟前
RLHF:人类反馈强化学习 | 对齐AI与人类价值观的核心引擎
人工智能·深度学习·算法·机器学习·强化学习·rlhf·人类反馈强化学习
我爱一条柴ya38 分钟前
【AI大模型】RAG系统组件:向量数据库(ChromaDB)
数据库·人工智能·pytorch·python·ai·ai编程
MARS_AI_43 分钟前
云蝠智能VoiceAgent重构企业电话客服体系
人工智能·自然语言处理·人机交互·交互·信息与通信
在猴站学算法4 小时前
机器学习(西瓜书) 第二章 模型评估与选择
人工智能·机器学习
科技宅说5 小时前
36氪专访丨乐橙CEO谢运:AI科技下的业务创新与长期主义下的品牌坚守
人工智能·科技
学术小八6 小时前
2025年人工智能、虚拟现实与交互设计国际学术会议
人工智能·交互·vr