package inspect import ( "bytes" "context" "encoding/json" // due to a bug in json-iterator it cannot be used here "fmt" "os" "regexp" "strings" "text/tabwriter" "text/template" "github.com/containers/common/pkg/completion" "github.com/containers/common/pkg/report" "github.com/containers/podman/v2/cmd/podman/common" "github.com/containers/podman/v2/cmd/podman/registry" "github.com/containers/podman/v2/cmd/podman/validate" "github.com/containers/podman/v2/libpod/define" "github.com/containers/podman/v2/pkg/domain/entities" "github.com/pkg/errors" "github.com/sirupsen/logrus" "github.com/spf13/cobra" ) const ( // AllType can be of type ImageType or ContainerType. AllType = "all" // ContainerType is the container type. ContainerType = "container" // ImageType is the image type. ImageType = "image" // NetworkType is the network type NetworkType = "network" // PodType is the pod type. PodType = "pod" // VolumeType is the volume type VolumeType = "volume" ) // AddInspectFlagSet takes a command and adds the inspect flags and returns an // InspectOptions object. func AddInspectFlagSet(cmd *cobra.Command) *entities.InspectOptions { opts := entities.InspectOptions{} flags := cmd.Flags() flags.BoolVarP(&opts.Size, "size", "s", false, "Display total file size") formatFlagName := "format" flags.StringVarP(&opts.Format, formatFlagName, "f", "json", "Format the output to a Go template or json") _ = cmd.RegisterFlagCompletionFunc(formatFlagName, completion.AutocompleteNone) typeFlagName := "type" flags.StringVarP(&opts.Type, typeFlagName, "t", AllType, fmt.Sprintf("Specify inspect-oject type (%q, %q or %q)", ImageType, ContainerType, AllType)) _ = cmd.RegisterFlagCompletionFunc(typeFlagName, common.AutocompleteInspectType) validate.AddLatestFlag(cmd, &opts.Latest) return &opts } // Inspect inspects the specified container/image names or IDs. func Inspect(namesOrIDs []string, options entities.InspectOptions) error { inspector, err := newInspector(options) if err != nil { return err } return inspector.inspect(namesOrIDs) } // inspector allows for inspecting images and containers. type inspector struct { containerEngine entities.ContainerEngine imageEngine entities.ImageEngine options entities.InspectOptions podOptions entities.PodInspectOptions } // newInspector creates a new inspector based on the specified options. func newInspector(options entities.InspectOptions) (*inspector, error) { switch options.Type { case ImageType, ContainerType, AllType, PodType, NetworkType, VolumeType: // Valid types. default: return nil, errors.Errorf("invalid type %q: must be %q, %q, %q, %q, %q, or %q", options.Type, ImageType, ContainerType, PodType, NetworkType, VolumeType, AllType) } if options.Type == ImageType { if options.Latest { return nil, errors.Errorf("latest is not supported for type %q", ImageType) } if options.Size { return nil, errors.Errorf("size is not supported for type %q", ImageType) } } if options.Type == PodType && options.Size { return nil, errors.Errorf("size is not supported for type %q", PodType) } podOpts := entities.PodInspectOptions{ Latest: options.Latest, Format: options.Format, } return &inspector{ containerEngine: registry.ContainerEngine(), imageEngine: registry.ImageEngine(), options: options, podOptions: podOpts, }, nil } // inspect inspects the specified container/image names or IDs. func (i *inspector) inspect(namesOrIDs []string) error { // data - dumping place for inspection results. var data []interface{} // nolint var errs []error ctx := context.Background() if len(namesOrIDs) == 0 { if !i.options.Latest && !i.options.All { return errors.New("no names or ids specified") } } tmpType := i.options.Type if i.options.Latest { if len(namesOrIDs) > 0 { return errors.New("--latest and arguments cannot be used together") } if i.options.Type == AllType { tmpType = ContainerType // -l works with --type=all, defaults to containertype } } // Inspect - note that AllType requires us to expensively query one-by-one. switch tmpType { case AllType: allData, allErrs, err := i.inspectAll(ctx, namesOrIDs) if err != nil { return err } data = allData errs = allErrs case ImageType: imgData, allErrs, err := i.imageEngine.Inspect(ctx, namesOrIDs, i.options) if err != nil { return err } errs = allErrs for i := range imgData { data = append(data, imgData[i]) } case ContainerType: ctrData, allErrs, err := i.containerEngine.ContainerInspect(ctx, namesOrIDs, i.options) if err != nil { return err } errs = allErrs for i := range ctrData { data = append(data, ctrData[i]) } case PodType: for _, pod := range namesOrIDs { i.podOptions.NameOrID = pod podData, err := i.containerEngine.PodInspect(ctx, i.podOptions) if err != nil { cause := errors.Cause(err) if !strings.Contains(cause.Error(), define.ErrNoSuchPod.Error()) { errs = []error{err} } else { return err } } else { errs = nil data = append(data, podData) } } if i.podOptions.Latest { // latest means there are no names in the namesOrID array podData, err := i.containerEngine.PodInspect(ctx, i.podOptions) if err != nil { cause := errors.Cause(err) if !strings.Contains(cause.Error(), define.ErrNoSuchPod.Error()) { errs = []error{err} } else { return err } } else { errs = nil data = append(data, podData) } } case NetworkType: networkData, allErrs, err := registry.ContainerEngine().NetworkInspect(ctx, namesOrIDs, i.options) if err != nil { return err } errs = allErrs for i := range networkData { data = append(data, networkData[i]) } case VolumeType: volumeData, allErrs, err := i.containerEngine.VolumeInspect(ctx, namesOrIDs, i.options) if err != nil { return err } errs = allErrs for i := range volumeData { data = append(data, volumeData[i]) } default: return errors.Errorf("invalid type %q: must be %q, %q, %q, %q, %q, or %q", i.options.Type, ImageType, ContainerType, PodType, NetworkType, VolumeType, AllType) } // Always print an empty array if data == nil { data = []interface{}{} } var err error switch { case report.IsJSON(i.options.Format) || i.options.Format == "": err = printJSON(data) default: row := inspectNormalize(i.options.Format) row = "{{range . }}" + report.NormalizeFormat(row) + "{{end}}" err = printTmpl(tmpType, row, data) } if err != nil { logrus.Errorf("Error printing inspect output: %v", err) } if len(errs) > 0 { if len(errs) > 1 { for _, err := range errs[1:] { fmt.Fprintf(os.Stderr, "error inspecting object: %v\n", err) } } return errors.Errorf("error inspecting object: %v", errs[0]) } return nil } func printJSON(data []interface{}) error { buf, err := json.MarshalIndent(data, "", " ") if err != nil { return err } _, err = fmt.Println(string(buf)) return err } func printTmpl(typ, row string, data []interface{}) error { t, err := template.New(typ + " inspect").Funcs(map[string]interface{}{ "json": func(v interface{}) string { b := &bytes.Buffer{} e := registry.JSONLibrary().NewEncoder(b) e.SetEscapeHTML(false) _ = e.Encode(v) return strings.TrimSpace(b.String()) }, }).Parse(row) if err != nil { return err } w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0) return t.Execute(w, data) } func (i *inspector) inspectAll(ctx context.Context, namesOrIDs []string) ([]interface{}, []error, error) { var data []interface{} // nolint allErrs := []error{} for _, name := range namesOrIDs { ctrData, errs, err := i.containerEngine.ContainerInspect(ctx, []string{name}, i.options) if err != nil { return nil, nil, err } if len(errs) == 0 { data = append(data, ctrData[0]) continue } imgData, errs, err := i.imageEngine.Inspect(ctx, []string{name}, i.options) if err != nil { return nil, nil, err } if len(errs) == 0 { data = append(data, imgData[0]) continue } volumeData, errs, err := i.containerEngine.VolumeInspect(ctx, []string{name}, i.options) if err != nil { return nil, nil, err } if len(errs) == 0 { data = append(data, volumeData[0]) continue } networkData, errs, err := registry.ContainerEngine().NetworkInspect(ctx, namesOrIDs, i.options) if err != nil { return nil, nil, err } if len(errs) == 0 { data = append(data, networkData[0]) continue } i.podOptions.NameOrID = name podData, err := i.containerEngine.PodInspect(ctx, i.podOptions) if err != nil { cause := errors.Cause(err) if !strings.Contains(cause.Error(), define.ErrNoSuchPod.Error()) { return nil, nil, err } } else { data = append(data, podData) continue } if len(errs) > 0 { allErrs = append(allErrs, errors.Errorf("no such object: %q", name)) continue } } return data, allErrs, nil } func inspectNormalize(row string) string { m := regexp.MustCompile(`{{\s*\.Id\s*}}`) row = m.ReplaceAllString(row, "{{.ID}}") r := strings.NewReplacer( ".Src", ".Source", ".Dst", ".Destination", ".ImageID", ".Image", ) return r.Replace(row) }