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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)
}
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