Fix pruning anon volume created from image config

Volumes created from the image config were not being pruned because the
volume service did not think they were anonymous since the code to
create passes along a generated name instead of letting the volume
service generate it.

This changes the code path to have the volume service generate the name
instead of doing it ahead of time.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

daemon/create_unix.go

@@ -13,7 +13,6 @@ import (
 	mounttypes "github.com/docker/docker/api/types/mount"
 	"github.com/docker/docker/container"
 	"github.com/docker/docker/oci"
-	"github.com/docker/docker/pkg/stringid"
 	volumeopts "github.com/docker/docker/volume/service/opts"
 	"github.com/opencontainers/selinux/go-selinux/label"
 	"github.com/sirupsen/logrus"
@@ -42,7 +41,6 @@ func (daemon *Daemon) createContainerOSSpecificSettings(container *container.Con
 	}
 
 	for spec := range config.Volumes {
-		name := stringid.GenerateRandomID()
 		destination := filepath.Clean(spec)
 
 		// Skip volumes for which we already have something mounted on that
@@ -62,7 +60,7 @@ func (daemon *Daemon) createContainerOSSpecificSettings(container *container.Con
 			return fmt.Errorf("cannot mount volume over existing file, file exists %s", path)
 		}
 
-		v, err := daemon.volumes.Create(context.TODO(), name, hostConfig.VolumeDriver, volumeopts.WithCreateReference(container.ID))
+		v, err := daemon.volumes.Create(context.TODO(), "", hostConfig.VolumeDriver, volumeopts.WithCreateReference(container.ID))
 		if err != nil {
 			return err
 		}

daemon/create_windows.go

@@ -6,7 +6,6 @@ import (
 
 	containertypes "github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/container"
-	"github.com/docker/docker/pkg/stringid"
 	volumemounts "github.com/docker/docker/volume/mounts"
 	volumeopts "github.com/docker/docker/volume/service/opts"
 )
@@ -25,11 +24,6 @@ func (daemon *Daemon) createContainerOSSpecificSettings(container *container.Con
 			return fmt.Errorf("Unrecognised volume spec: %v", err)
 		}
 
-		// If the mountpoint doesn't have a name, generate one.
-		if len(mp.Name) == 0 {
-			mp.Name = stringid.GenerateRandomID()
-		}
-
 		// Skip volumes for which we already have something mounted on that
 		// destination because of a --volume-from.
 		if container.IsDestinationMounted(mp.Destination) {
@@ -40,7 +34,7 @@ func (daemon *Daemon) createContainerOSSpecificSettings(container *container.Con
 
 		// Create the volume in the volume driver. If it doesn't exist,
 		// a new one will be created.
-		v, err := daemon.volumes.Create(context.TODO(), mp.Name, volumeDriver, volumeopts.WithCreateReference(container.ID))
+		v, err := daemon.volumes.Create(context.TODO(), "", volumeDriver, volumeopts.WithCreateReference(container.ID))
 		if err != nil {
 			return err
 		}

integration/internal/build/build.go

@@ -0,0 +1,52 @@
+package build
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"testing"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/client"
+	"github.com/docker/docker/pkg/jsonmessage"
+	"github.com/docker/docker/testutil/fakecontext"
+	"gotest.tools/v3/assert"
+)
+
+// Do builds an image from the given context and returns the image ID.
+func Do(ctx context.Context, t *testing.T, client client.APIClient, buildCtx *fakecontext.Fake) string {
+	resp, err := client.ImageBuild(ctx, buildCtx.AsTarReader(t), types.ImageBuildOptions{})
+	if resp.Body != nil {
+		defer resp.Body.Close()
+	}
+	assert.NilError(t, err)
+	img := GetImageIDFromBody(t, resp.Body)
+	t.Cleanup(func() {
+		client.ImageRemove(ctx, img, types.ImageRemoveOptions{Force: true})
+	})
+	return img
+}
+
+// GetImageIDFRommBody reads the image ID from the build response body.
+func GetImageIDFromBody(t *testing.T, body io.Reader) string {
+	var (
+		jm  jsonmessage.JSONMessage
+		br  types.BuildResult
+		dec = json.NewDecoder(body)
+	)
+	for {
+		err := dec.Decode(&jm)
+		if err == io.EOF {
+			break
+		}
+		assert.NilError(t, err)
+		if jm.Aux == nil {
+			continue
+		}
+		assert.NilError(t, json.Unmarshal(*jm.Aux, &br))
+		assert.Assert(t, br.ID != "", "could not read image ID from build output")
+		break
+	}
+	io.Copy(io.Discard, body)
+	return br.ID
+}

integration/internal/container/container.go

@@ -48,6 +48,7 @@ func create(ctx context.Context, t *testing.T, client client.APIClient, ops ...f
 
 // Create creates a container with the specified options, asserting that there was no error
 func Create(ctx context.Context, t *testing.T, client client.APIClient, ops ...func(*TestContainerConfig)) string {
+	t.Helper()
 	c, err := create(ctx, t, client, ops...)
 	assert.NilError(t, err)
 

integration/volume/volume_test.go

@@ -14,8 +14,10 @@ import (
 	"github.com/docker/docker/api/types/volume"
 	clientpkg "github.com/docker/docker/client"
 	"github.com/docker/docker/errdefs"
+	"github.com/docker/docker/integration/internal/build"
 	"github.com/docker/docker/integration/internal/container"
 	"github.com/docker/docker/testutil/daemon"
+	"github.com/docker/docker/testutil/fakecontext"
 	"github.com/docker/docker/testutil/request"
 	"github.com/google/go-cmp/cmp/cmpopts"
 	"gotest.tools/v3/assert"
@@ -304,3 +306,37 @@ func TestVolumePruneAnonymous(t *testing.T) {
 	assert.Check(t, cmp.Contains(pruneReport.VolumesDeleted, v.Name))
 	assert.Check(t, cmp.Contains(pruneReport.VolumesDeleted, vNamed.Name))
 }
+
+func TestVolumePruneAnonFromImage(t *testing.T) {
+	defer setupTest(t)()
+	client := testEnv.APIClient()
+
+	volDest := "/foo"
+	if testEnv.OSType == "windows" {
+		volDest = `c:\\foo`
+	}
+
+	dockerfile := `FROM busybox
+VOLUME ` + volDest
+
+	ctx := context.Background()
+	img := build.Do(ctx, t, client, fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile)))
+
+	id := container.Create(ctx, t, client, container.WithImage(img))
+	defer client.ContainerRemove(ctx, id, types.ContainerRemoveOptions{})
+
+	inspect, err := client.ContainerInspect(ctx, id)
+	assert.NilError(t, err)
+
+	assert.Assert(t, cmp.Len(inspect.Mounts, 1))
+
+	volumeName := inspect.Mounts[0].Name
+	assert.Assert(t, volumeName != "")
+
+	err = client.ContainerRemove(ctx, id, types.ContainerRemoveOptions{})
+	assert.NilError(t, err)
+
+	pruneReport, err := client.VolumesPrune(ctx, filters.Args{})
+	assert.NilError(t, err)
+	assert.Assert(t, cmp.Contains(pruneReport.VolumesDeleted, volumeName))
+}