podman volume export/import: give better error

When the volume does not exist we should output an error stating so and
not some generic one.

Fixes #14411

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

cmd/podman/volumes/export.go

@@ -8,6 +8,7 @@ import (
 	"github.com/containers/podman/v4/cmd/podman/common"
 	"github.com/containers/podman/v4/cmd/podman/registry"
 	"github.com/containers/podman/v4/pkg/domain/entities"
+	"github.com/containers/podman/v4/pkg/errorhandling"
 	"github.com/containers/podman/v4/utils"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -58,10 +59,13 @@ func export(cmd *cobra.Command, args []string) error {
 		return errors.New("expects output path, use --output=[path]")
 	}
 	inspectOpts.Type = common.VolumeType
-	volumeData, _, err := containerEngine.VolumeInspect(ctx, args, inspectOpts)
+	volumeData, errs, err := containerEngine.VolumeInspect(ctx, args, inspectOpts)
 	if err != nil {
 		return err
 	}
+	if len(errs) > 0 {
+		return errorhandling.JoinErrors(errs)
+	}
 	if len(volumeData) < 1 {
 		return errors.New("no volume data found")
 	}

cmd/podman/volumes/import.go

@@ -8,6 +8,7 @@ import (
 	"github.com/containers/podman/v4/cmd/podman/parse"
 	"github.com/containers/podman/v4/cmd/podman/registry"
 	"github.com/containers/podman/v4/pkg/domain/entities"
+	"github.com/containers/podman/v4/pkg/errorhandling"
 	"github.com/containers/podman/v4/utils"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
@@ -60,10 +61,14 @@ func importVol(cmd *cobra.Command, args []string) error {
 	}
 
 	inspectOpts.Type = common.VolumeType
-	volumeData, _, err := containerEngine.VolumeInspect(ctx, volumes, inspectOpts)
+	inspectOpts.Type = common.VolumeType
+	volumeData, errs, err := containerEngine.VolumeInspect(ctx, volumes, inspectOpts)
 	if err != nil {
 		return err
 	}
+	if len(errs) > 0 {
+		return errorhandling.JoinErrors(errs)
+	}
 	if len(volumeData) < 1 {
 		return errors.New("no volume data found")
 	}

docs/source/markdown/podman-volume-import.1.md

@@ -1,7 +1,7 @@
 % podman-volume-import(1)
 
 ## NAME
-podman\-volume\-import - Import tarball contents into a podman volume
+podman\-volume\-import - Import tarball contents into an existing podman volume
 
 ## SYNOPSIS
 **podman volume import** *volume* [*source*]
@@ -11,9 +11,9 @@ podman\-volume\-import - Import tarball contents into a podman volume
 **podman volume import** imports the contents of a tarball into the podman volume's mount point.
 **podman volume import** can consume piped input when using `-` as source path.
 
-Note: Following command is not supported by podman-remote.
+The given volume must already exist and will not be created by podman volume import.
 
-**podman volume import VOLUME [SOURCE]**
+Note: Following command is not supported by podman-remote.
 
 #### **--help**
 

docs/source/markdown/podman-volume.1.md

@@ -16,7 +16,7 @@ podman volume is a set of subcommands that manage volumes.
 | create  | [podman-volume-create(1)](podman-volume-create.1.md)   | Create a new volume.                                                           |
 | exists  | [podman-volume-exists(1)](podman-volume-exists.1.md)   | Check if the given volume exists.                                              |
 | export  | [podman-volume-export(1)](podman-volume-export.1.md)   | Exports volume to external tar.                                                |
-| import  | [podman-volume-import(1)](podman-volume-import.1.md)   | Import tarball contents into a podman volume.                                  |
+| import  | [podman-volume-import(1)](podman-volume-import.1.md)   | Import tarball contents into an existing podman volume.                        |
 | inspect | [podman-volume-inspect(1)](podman-volume-inspect.1.md) | Get detailed information on one or more volumes.                               |
 | ls      | [podman-volume-ls(1)](podman-volume-ls.1.md)           | List all the available volumes.                                                |
 | mount   | [podman-volume-mount(1)](podman-volume-mount.1.md)     | Mount a volume filesystem.                                                     |

test/e2e/volume_create_test.go

@@ -110,15 +110,24 @@ var _ = Describe("Podman volume create", func() {
 		Expect(session.OutputToString()).To(ContainSubstring("hello"))
 	})
 
-	It("podman import volume should fail", func() {
+	It("podman import/export volume should fail", func() {
 		// try import on volume or source which does not exists
-		if podmanTest.RemoteTest {
+		SkipIfRemote("Volume export check does not work with a remote client")
-			Skip("Volume export check does not work with a remote client")
-		}
 
 		session := podmanTest.Podman([]string{"volume", "import", "notfound", "notfound.tar"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).To(ExitWithError())
+		Expect(session.ErrorToString()).To(ContainSubstring("open notfound.tar: no such file or directory"))
+
+		session = podmanTest.Podman([]string{"volume", "import", "notfound", "-"})
+		session.WaitWithDefaultTimeout()
+		Expect(session).To(ExitWithError())
+		Expect(session.ErrorToString()).To(ContainSubstring("no such volume notfound"))
+
+		session = podmanTest.Podman([]string{"volume", "export", "notfound"})
+		session.WaitWithDefaultTimeout()
+		Expect(session).To(ExitWithError())
+		Expect(session.ErrorToString()).To(ContainSubstring("no such volume notfound"))
 	})
 
 	It("podman create volume with bad volume option", func() {