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容器操作.md

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创建容器

创建一个新容器但是不运行它

接着上面的r.initRoutes()

initRoutes() #里面有多个操作,以创建为例
-> r.postContainersCreate() [container_routes.go]
-> s.backend.ContainerStart ()  #ContainerStart为一个接口
-> containerCreate() [create.go]
-> daemon.create()
   1. daemon.GetImage()
   2. 校验配置
   3. daemon.newContainer()
   4. daemon.setSecurityOptions()
   5. daemon.setRWLayer()
   6. daemon.setHostConfig()
   7. daemon.createContainerPlatformSpecificSettings()
   8. daemon.updateContainerNetworkSettings()
   9. daemon.Register()

运行容器

容器的定义

type Container struct {
	CommonContainer

	// Fields below here are platform specific.
	AppArmorProfile string
	HostnamePath    string
	HostsPath       string
	ShmPath         string
	ResolvConfPath  string
	SeccompProfile  string
	NoNewPrivileges bool
}

type CommonContainer struct {
	StreamConfig *stream.Config
	// embed for Container to support states directly.
	*State          `json:"State"` // Needed for remote api version <= 1.11
	Root            string         `json:"-"` // Path to the "home" of the container, including metadata.
	BaseFS          string         `json:"-"` // Path to the graphdriver mountpoint
	RWLayer         layer.RWLayer  `json:"-"`
	ID              string
	Created         time.Time
	Managed         bool
	Path            string
	Args            []string
	Config          *containertypes.Config
	ImageID         image.ID `json:"Image"`
	NetworkSettings *network.Settings
	LogPath         string
	Name            string
	Driver          string
	// MountLabel contains the options for the 'mount' command
	MountLabel             string
	ProcessLabel           string
	RestartCount           int
	HasBeenStartedBefore   bool
	HasBeenManuallyStopped bool // used for unless-stopped restart policy
	MountPoints            map[string]*volume.MountPoint
	HostConfig             *containertypes.HostConfig `json:"-"` // do not serialize the host config in the json, otherwise we'll make the container unportable
	ExecCommands           *exec.Store                `json:"-"`
	// logDriver for closing
	LogDriver      logger.Logger  `json:"-"`
	LogCopier      *logger.Copier `json:"-"`
	restartManager restartmanager.RestartManager
	attachContext  *attachContext
}

containerStart()
-> 先判断容器状态是否为RemovalInProgress或者Dead,如果是则退出
-> conditionalMountOnStart 挂载镜像
   -> Mount()
-> initializeNetworking(container) 初始化容器网络
   -> 先判断是host模式还是容器,读取主机配置
   -> allocateNetwork()
      -> SandboxDestroy(container.ID)
      -> 如果container.NetworkSettings.Networks为空,则updateContainerNetworkSettings更新
      -> 循环container.NetworkSettings.Networks,调用connectToNetwork()
         -> updateNetworkConfig()
         -> getNetworkSandbox() 得到sb
         -> BuildCreateEndpointOptions() 构建ep配置
         -> CreateEndpoint() 创建ep
            -> 
         -> defer 退出时候删除endpoint
         -> 把endpointConfig赋值给container.NetworkSettings.Networks[n.Name()]
         -> updateEndpointNetworkSettings()
         -> 如果sandbox为空则新建一个
         -> ep.Join把endpoint加到sandbox中
            -> 设置锁
            -> ep.sbJoin
               -> 去store里面拿了ep和network
               -> 获取driver,然后Join到ep中
               -> 设置一个defer,把driver从ep中移出
               -> 获取了IP(ep.iface.addr.IP)
               -> 更新sb和把ep塞入controller的store
               -> sb.getGatewayEndpoint()为sb提供外部连接
               -> sb.populateNetworkResources()
                  -> ep.iface和ep.iface.srcName 不为空, 把部分参数赋值到sb里面
                  -> 更新sb的gateway
            -> 
         -> getPortMapInfo获取sb的端口表,赋值给container.NetworkSettings.Ports
         -> 
         
->

重启容器

postContainersRestart() [\api\server\router\container\container_routes.go]
-> ContainerRestart()
   -> GetContainer()
   -> containerRestart()
      -> Mount()
      -> containerStop()
      -> containerStart()

删除容器

接着上面的r.initRoutes()

r.deleteContainers()
-> 解析参数,创建删除参数ContainerRmConfig
-> ContainerRm() [\container\container.go]
   -> daemon.GetContainer(name)获取容器,如果出错直接退出
   -> SetRemovalInProgress()设置容器状态为removed,避免重复
   -> daemon.containers.Get(ID)
   -> 如果config.RemoveLink为真，则调用daemon.rmLink()并直接退出
   -> cleanupContainer()
      -> 如果容器正在运行,config.ForceRemove为假,则退出,为真则kill容器
      -> stopCollection() 关闭订阅,并从度量收集中删除
      -> containerStop()
      -> SetDead() 把容器标记为dead,防止别的启动
      -> ToDiskLocking() 保存容器状态到磁盘
      ->