package volumes import ( "fmt" "os" "github.com/containers/podman/v3/cmd/podman/common" "github.com/containers/podman/v3/cmd/podman/inspect" "github.com/containers/podman/v3/cmd/podman/parse" "github.com/containers/podman/v3/cmd/podman/registry" "github.com/containers/podman/v3/pkg/domain/entities" "github.com/containers/podman/v3/utils" "github.com/pkg/errors" "github.com/spf13/cobra" ) var ( importDescription = `Imports contents into a podman volume from specified tarball (.tar, .tar.gz, .tgz, .bzip, .tar.xz, .txz).` importCommand = &cobra.Command{ Annotations: map[string]string{registry.EngineMode: registry.ABIMode}, Use: "import VOLUME [SOURCE]", Short: "Import a tarball contents into a podman volume", Long: importDescription, RunE: importVol, Args: cobra.ExactArgs(2), ValidArgsFunction: common.AutocompleteVolumes, Example: `podman volume import my_vol /home/user/import.tar cat ctr.tar | podman import volume my_vol -`, } ) func init() { registry.Commands = append(registry.Commands, registry.CliCommand{ Command: importCommand, Parent: volumeCmd, }) } func importVol(cmd *cobra.Command, args []string) error { var inspectOpts entities.InspectOptions var tarFile *os.File containerEngine := registry.ContainerEngine() ctx := registry.Context() // create a slice of volumes since inspect expects slice as arg volumes := []string{args[0]} tarPath := args[1] if tarPath != "-" { err := parse.ValidateFileName(tarPath) if err != nil { return err } // open tar file tarFile, err = os.Open(tarPath) if err != nil { return err } } else { tarFile = os.Stdin } inspectOpts.Type = inspect.VolumeType volumeData, _, err := containerEngine.VolumeInspect(ctx, volumes, inspectOpts) if err != nil { return err } if len(volumeData) < 1 { return errors.New("no volume data found") } mountPoint := volumeData[0].VolumeConfigResponse.Mountpoint driver := volumeData[0].VolumeConfigResponse.Driver volumeOptions := volumeData[0].VolumeConfigResponse.Options volumeMountStatus, err := containerEngine.VolumeMounted(ctx, args[0]) if err != nil { return err } if mountPoint == "" { return errors.New("volume is not mounted anywhere on host") } // Check if volume is using external plugin and export only if volume is mounted if driver != "" && driver != "local" { if !volumeMountStatus.Value { return fmt.Errorf("volume is using a driver %s and volume is not mounted on %s", driver, mountPoint) } } // Check if volume is using `local` driver and has mount options type other than tmpfs if driver == "local" { if mountOptionType, ok := volumeOptions["type"]; ok { if mountOptionType != "tmpfs" && !volumeMountStatus.Value { return fmt.Errorf("volume is using a driver %s and volume is not mounted on %s", driver, mountPoint) } } } // dont care if volume is mounted or not we are gonna import everything to mountPoint return utils.UntarToFileSystem(mountPoint, tarFile, nil) }