containerd学习笔记

containerd的总体架构图，希望对大家有所帮助，containerd的总体架构图，希望对大家有所帮助

containerd架构基础

• containerd基础数据结构及初始化
  • containerd架构图
  • 数据结构
  • 公共模块plugin中register Registeration数组，plugin Register 函数将各个Plugin注册到该数组中，LoadPlugin将该数组中注册的 Plugin转换为map形式，便于应用
  • 每个plugin的InitFn都会返回Interface{}类型的plugin registratioon中的Init函数会将plugin赋值到Plugin的instance中
  • 初始化
    • 1.建立信号处理机制
    • 2. 加载并解析配置文件
    • 3. 初始化服务组件，注册无init函数的插件，依次调用各个Plugin的InitFn进行初始化
      • Content Plugin、Metadata Plugin、Snapshot Plugin和Proxy Plugin
    • 4. 初始化grpc server， 将各个Plugin的service(若存在)注册到grpc server中
• containerd命令组件
  • config 用于生成containerd默认配置文件
  • publish 向containerd发布事件
  • oci-hooks 提供oci运行时钩子的基础组件
  • app.Action 主流程
• containerd plugin ctr plugins ls
  • Content Plugin io.containerd.content.v1
    • content
  • Metadata Plugin io.containerd.metadata.v1
    • bolt
  • Snapshot Plugin io.containerd.snapshotter.v1
    • btrfs
    • aufs
    • native
    • overlayfs
    • zfs
  • differ plugin io.containerd.differ.v1
    • walking
  • service plugin io.containerd.service.v1
    • containers-service
    • content-service
    • diff-service
    • images-service
    • leases-service
    • namespaces-service
    • snapshots-service
    • task-service
  • Internal Plugin io.containerd.internal.v1
    • restart
    • opts
  • GRPC Plugin io.containerd.grpc.v1
    • containers
    • content
    • diff
    • healthcheck
    • images
    • namespaces
    • snapshots
    • tasks
    • version
    • cri
  • Runtime Plugin
    • io.containerd.runtime.v1
      • linux
    • io.containerd.runtime.v2
      • tasks
  • Proxy Plugin 用于自定义外部插件，比如说snapshot plugin等等
• config
• oci open container initiative
  • runtime spec
  • image spec
    • 文件系统
    • config 文件
    • manifest文件
    • index文件
• cni
  • AddNetworkList(net *NetworkConfigList, rt *RuntimeConf) (types.Result, error)
  • DelNetworkList(net *NetworkConfigList, rt *RuntimeConf) error
  • AddNetwork(net *NetworkConfig, rt *RuntimeConf) (types.Result, error)
  • DelNetwork(net *NetworkConfig, rt *RuntimeConf) error
• cri
  • Runtime Service
    • rpc Version(VersionRequest) returns (VersionResponse) {}
    • rpc RunPodSandbox(RunPodSandboxRequest) returns (RunPodSandboxResponse) {}
    • StopPodSandbox(StopPodSandboxRequest) returns (StopPodSandboxResponse) {}
    • rpc RemovePodSandbox(RemovePodSandboxRequest) returns(RemovePodSandboxResponse) {}
    • rpc PodSandboxStatus(PodSandboxStatusRequest) returns (PodSandboxStatusResponse) {}
    • rpc ListPodSandbox(ListPodSandboxRequest) returns (ListPodSandboxResponse) {}
    • rpc CreateContainer(CreateContainerRequest) returns (CreateContainerResponse) {}
    • rpc StartContainer(StartContainerRequest) returns (StartContainerResponse) {}
    • rpc StopContainer(StopContainerRequest) returns (StopContainerResponse) {}
    • rpc RemoveContainer(RemoveContainerRequest) returns (RemoveContainerResponse) {}
    • rpc ListContainers(ListContainersRequest) returns (ListContainersResponse) {}
    • rpc ContainerStatus(ContainerStatusRequest) returns (ContainerStatusResponse) {}
    • rpc UpdateContainerResources(UpdateContainerResourcesRequest) returns (UpdateContainerResourcesResponse) {}
    • rpc ExecSync(ExecSyncRequest) returns (ExecSyncResponse) {}
    • rpc Exec(ExecRequest) returns (ExecResponse) {}
    • rpc Attach(AttachRequest) returns (AttachResponse) {}
    • rpc PortForward(PortForwardRequest) returns (PortForwardResponse) {}
    • rpc ContainerStats(ContainerStatsRequest) returns (ContainerStatsResponse) {}
    • rpc ListContainerStats(ListContainerStatsRequest) returns (ListContainerStatsResponse) {}
    • rpc UpdateRuntimeConfig(UpdateRuntimeConfigRequest) returns (UpdateRuntimeConfigResponse) {}
    • rpc Status(StatusRequest) returns (StatusResponse) {}
  • Image Service
    • rpc ListImages(ListImagesRequest) returns (ListImagesResponse) {}
    • rpc ImageStatus(ImageStatusRequest) returns (ImageStatusResponse) {}
    • rpc PullImage(PullImageRequest) returns (PullImageResponse) {}
    • rpc RemoveImage(RemoveImageRequest) returns (RemoveImageResponse) {}
    • rpc ImageFsInfo(ImageFsInfoRequest) returns (ImageFsInfoResponse) {}
• type MetricsConfig struct { Address string `toml:"address"` GRPCHistogram bool `toml:"grpc_histogram"` }
• type Debug struct { Address string `toml:"address"` UID int `toml:"uid"` GID int `toml:"gid"` Level string `toml:"level"` }
• type GRPCConfig struct { Address string `toml:"address"` UID int `toml:"uid"` GID int `toml:"gid"` MaxRecvMsgSize int `toml:"max_recv_message_size"` MaxSendMsgSize int `toml:"max_send_message_size"` }
• type Config struct { 、 Root string `toml:"root"` State string `toml:"state"` GRPC GRPCConfig `toml:"grpc"` Debug Debug `toml:"debug"` Metrics MetricsConfig `toml:"metrics"` DisabledPlugins []string `toml:"disabled_plugins"` Plugins map[string]toml.Primitive `toml:"plugins"` OOMScore int `toml:"oom_score"` Cgroup CgroupConfig `toml:"cgroup"` ProxyPlugins map[string]ProxyPlugin `toml:"proxy_plugins"` md toml.MetaData }