package system import ( "fmt" "strings" "golang.org/x/net/context" "github.com/docker/docker/cli" "github.com/docker/docker/cli/command" "github.com/docker/docker/cli/command/inspect" apiclient "github.com/docker/docker/client" "github.com/spf13/cobra" ) type inspectOptions struct { format string inspectType string size bool ids []string } // NewInspectCommand creates a new cobra.Command for `docker inspect` func NewInspectCommand(dockerCli *command.DockerCli) *cobra.Command { var opts inspectOptions cmd := &cobra.Command{ Use: "inspect [OPTIONS] NAME|ID [NAME|ID...]", Short: "Return low-level information on Docker objects", Args: cli.RequiresMinArgs(1), RunE: func(cmd *cobra.Command, args []string) error { opts.ids = args return runInspect(dockerCli, opts) }, } flags := cmd.Flags() flags.StringVarP(&opts.format, "format", "f", "", "Format the output using the given Go template") flags.StringVar(&opts.inspectType, "type", "", "Return JSON for specified type") flags.BoolVarP(&opts.size, "size", "s", false, "Display total file sizes if the type is container") return cmd } func runInspect(dockerCli *command.DockerCli, opts inspectOptions) error { var elementSearcher inspect.GetRefFunc switch opts.inspectType { case "", "container", "image", "node", "network", "service", "volume", "task", "plugin": elementSearcher = inspectAll(context.Background(), dockerCli, opts.size, opts.inspectType) default: return fmt.Errorf("%q is not a valid value for --type", opts.inspectType) } return inspect.Inspect(dockerCli.Out(), opts.ids, opts.format, elementSearcher) } func inspectContainers(ctx context.Context, dockerCli *command.DockerCli, getSize bool) inspect.GetRefFunc { return func(ref string) (interface{}, []byte, error) { return dockerCli.Client().ContainerInspectWithRaw(ctx, ref, getSize) } } func inspectImages(ctx context.Context, dockerCli *command.DockerCli) inspect.GetRefFunc { return func(ref string) (interface{}, []byte, error) { return dockerCli.Client().ImageInspectWithRaw(ctx, ref) } } func inspectNetwork(ctx context.Context, dockerCli *command.DockerCli) inspect.GetRefFunc { return func(ref string) (interface{}, []byte, error) { return dockerCli.Client().NetworkInspectWithRaw(ctx, ref) } } func inspectNode(ctx context.Context, dockerCli *command.DockerCli) inspect.GetRefFunc { return func(ref string) (interface{}, []byte, error) { return dockerCli.Client().NodeInspectWithRaw(ctx, ref) } } func inspectService(ctx context.Context, dockerCli *command.DockerCli) inspect.GetRefFunc { return func(ref string) (interface{}, []byte, error) { return dockerCli.Client().ServiceInspectWithRaw(ctx, ref) } } func inspectTasks(ctx context.Context, dockerCli *command.DockerCli) inspect.GetRefFunc { return func(ref string) (interface{}, []byte, error) { return dockerCli.Client().TaskInspectWithRaw(ctx, ref) } } func inspectVolume(ctx context.Context, dockerCli *command.DockerCli) inspect.GetRefFunc { return func(ref string) (interface{}, []byte, error) { return dockerCli.Client().VolumeInspectWithRaw(ctx, ref) } } func inspectPlugin(ctx context.Context, dockerCli *command.DockerCli) inspect.GetRefFunc { return func(ref string) (interface{}, []byte, error) { return dockerCli.Client().PluginInspectWithRaw(ctx, ref) } } func inspectAll(ctx context.Context, dockerCli *command.DockerCli, getSize bool, typeConstraint string) inspect.GetRefFunc { var inspectAutodetect = []struct { objectType string isSizeSupported bool isSwarmObject bool objectInspector func(string) (interface{}, []byte, error) }{ { objectType: "container", isSizeSupported: true, objectInspector: inspectContainers(ctx, dockerCli, getSize), }, { objectType: "image", objectInspector: inspectImages(ctx, dockerCli), }, { objectType: "network", objectInspector: inspectNetwork(ctx, dockerCli), }, { objectType: "volume", objectInspector: inspectVolume(ctx, dockerCli), }, { objectType: "service", isSwarmObject: true, objectInspector: inspectService(ctx, dockerCli), }, { objectType: "task", isSwarmObject: true, objectInspector: inspectTasks(ctx, dockerCli), }, { objectType: "node", isSwarmObject: true, objectInspector: inspectNode(ctx, dockerCli), }, { objectType: "plugin", objectInspector: inspectPlugin(ctx, dockerCli), }, } // isSwarmManager does an Info API call to verify that the daemon is // a swarm manager. isSwarmManager := func() bool { info, err := dockerCli.Client().Info(ctx) if err != nil { fmt.Fprintln(dockerCli.Err(), err) return false } return info.Swarm.ControlAvailable } isErrNotSupported := func(err error) bool { return strings.Contains(err.Error(), "not supported") } return func(ref string) (interface{}, []byte, error) { const ( swarmSupportUnknown = iota swarmSupported swarmUnsupported ) isSwarmSupported := swarmSupportUnknown for _, inspectData := range inspectAutodetect { if typeConstraint != "" && inspectData.objectType != typeConstraint { continue } if typeConstraint == "" && inspectData.isSwarmObject { if isSwarmSupported == swarmSupportUnknown { if isSwarmManager() { isSwarmSupported = swarmSupported } else { isSwarmSupported = swarmUnsupported } } if isSwarmSupported == swarmUnsupported { continue } } v, raw, err := inspectData.objectInspector(ref) if err != nil { if typeConstraint == "" && (apiclient.IsErrNotFound(err) || isErrNotSupported(err)) { continue } return v, raw, err } if getSize && !inspectData.isSizeSupported { fmt.Fprintf(dockerCli.Err(), "WARNING: --size ignored for %s\n", inspectData.objectType) } return v, raw, err } return nil, nil, fmt.Errorf("Error: No such object: %s", ref) } }