04-docker-clent.md

以创建容器为例
入口：cli/cli/command/container/run.go:32

// NewRunCommand create a new `docker run` command
func NewRunCommand(dockerCli command.Cli) *cobra.Command {
	var opts runOptions
	var copts *containerOptions

	cmd := &cobra.Command{
		Use:   "run [OPTIONS] IMAGE [COMMAND] [ARG...]",
		Short: "Run a command in a new container",
		Args:  cli.RequiresMinArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			copts.Image = args[0]
			if len(args) > 1 {
				copts.Args = args[1:]
			}
			return runRun(dockerCli, cmd.Flags(), &opts, copts)
		},
	}

	flags := cmd.Flags()
	flags.SetInterspersed(false)

	// These are flags not stored in Config/HostConfig
	flags.BoolVarP(&opts.detach, "detach", "d", false, "Run container in background and print container ID")
	flags.BoolVar(&opts.sigProxy, "sig-proxy", true, "Proxy received signals to the process")
	flags.StringVar(&opts.name, "name", "", "Assign a name to the container")
	flags.StringVar(&opts.detachKeys, "detach-keys", "", "Override the key sequence for detaching a container")
	flags.StringVar(&opts.createOptions.pull, "pull", PullImageMissing,
		`Pull image before running ("`+PullImageAlways+`"|"`+PullImageMissing+`"|"`+PullImageNever+`")`)

	// Add an explicit help that doesn't have a `-h` to prevent the conflict
	// with hostname
	flags.Bool("help", false, "Print usage")

	command.AddPlatformFlag(flags, &opts.platform)
	command.AddTrustVerificationFlags(flags, &opts.untrusted, dockerCli.ContentTrustEnabled())
	copts = addFlags(flags)
	return cmd
}

跟下去最终通过client调用ContainerCreate
ContainerCreate走tcp请求到server的/containers/create