containerimage: support SOURCE_DATE_EPOCH for CreatedAt

Fix issue 3167

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

client/client_test.go

@@ -188,6 +188,7 @@ func TestIntegration(t *testing.T) {
 		testSourceDateEpochReset,
 		testSourceDateEpochLocalExporter,
 		testSourceDateEpochTarExporter,
+		testSourceDateEpochImageExporter,
 		testAttestationBundle,
 		testSBOMScan,
 		testSBOMScanSingleRef,
@@ -2923,6 +2924,66 @@ func testSourceDateEpochTarExporter(t *testing.T, sb integration.Sandbox) {
 
 	checkAllReleasable(t, c, sb, true)
 }
+
+func testSourceDateEpochImageExporter(t *testing.T, sb integration.Sandbox) {
+	cdAddress := sb.ContainerdAddress()
+	if cdAddress == "" {
+		t.SkipNow()
+	}
+	// https://github.com/containerd/containerd/commit/133ddce7cf18a1db175150e7a69470dea1bb3132
+	integration.CheckContainerdVersion(t, cdAddress, ">= 1.7.0-beta.1")
+
+	integration.CheckFeatureCompat(t, sb, integration.FeatureSourceDateEpoch)
+	requiresLinux(t)
+	c, err := New(sb.Context(), sb.Address())
+	require.NoError(t, err)
+
+	busybox := llb.Image("busybox:latest")
+	st := llb.Scratch()
+
+	run := func(cmd string) {
+		st = busybox.Run(llb.Shlex(cmd), llb.Dir("/wd")).AddMount("/wd", st)
+	}
+
+	run(`sh -c "echo -n first > foo"`)
+	run(`sh -c "echo -n second > bar"`)
+
+	def, err := st.Marshal(sb.Context())
+	require.NoError(t, err)
+
+	name := strings.ToLower(path.Base(t.Name()))
+	tm := time.Date(2015, time.October, 21, 7, 28, 0, 0, time.UTC)
+
+	_, err = c.Solve(sb.Context(), def, SolveOpt{
+		FrontendAttrs: map[string]string{
+			"build-arg:SOURCE_DATE_EPOCH": fmt.Sprintf("%d", tm.Unix()),
+		},
+		Exports: []ExportEntry{
+			{
+				Type: ExporterImage,
+				Attrs: map[string]string{
+					"name": name,
+				},
+			},
+		},
+	}, nil)
+	require.NoError(t, err)
+
+	ctx := namespaces.WithNamespace(sb.Context(), "buildkit")
+	client, err := newContainerd(cdAddress)
+	require.NoError(t, err)
+	defer client.Close()
+
+	img, err := client.GetImage(ctx, name)
+	require.NoError(t, err)
+	require.Equal(t, tm, img.Metadata().CreatedAt)
+
+	err = client.ImageService().Delete(ctx, name, images.SynchronousDelete())
+	require.NoError(t, err)
+
+	checkAllReleasable(t, c, sb, true)
+}
+
 func testFrontendMetadataReturn(t *testing.T, sb integration.Sandbox) {
 	requiresLinux(t)
 	c, err := New(sb.Context(), sb.Address())

exporter/containerimage/export.go

@@ -7,12 +7,12 @@ import (
 	"fmt"
 	"strconv"
 	"strings"
-	"time"
 
 	"github.com/containerd/containerd/content"
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/images"
 	"github.com/containerd/containerd/leases"
+	"github.com/containerd/containerd/pkg/epoch"
 	"github.com/containerd/containerd/platforms"
 	"github.com/containerd/containerd/remotes/docker"
 	"github.com/containerd/containerd/rootfs"
@@ -236,22 +236,34 @@ func (e *imageExporterInstance) Export(ctx context.Context, src *exporter.Source
 		for _, targetName := range targetNames {
 			if e.opt.Images != nil && e.store {
 				tagDone := progress.OneOff(ctx, "naming to "+targetName)
+
+				// imageClientCtx is used for propagating the epoch to e.opt.Images.Update() and e.opt.Images.Create().
+				//
+				// Ideally, we should be able to propagate the epoch via images.Image.CreatedAt.
+				// However, due to a bug of containerd, we are temporarily stuck with this workaround.
+				// https://github.com/containerd/containerd/issues/8322
+				imageClientCtx := ctx
+				if e.opts.Epoch != nil {
+					imageClientCtx = epoch.WithSourceDateEpoch(imageClientCtx, e.opts.Epoch)
+				}
 				img := images.Image{
-					Target:    *desc,
-					CreatedAt: time.Now(),
+					Target: *desc,
+					// CreatedAt in images.Images is ignored due to a bug of containerd.
+					// See the comment lines for imageClientCtx.
 				}
+
 				sfx := []string{""}
 				if nameCanonical {
 					sfx = append(sfx, "@"+desc.Digest.String())
 				}
 				for _, sfx := range sfx {
 					img.Name = targetName + sfx
-					if _, err := e.opt.Images.Update(ctx, img); err != nil {
+					if _, err := e.opt.Images.Update(imageClientCtx, img); err != nil {
 						if !errors.Is(err, errdefs.ErrNotFound) {
 							return nil, nil, tagDone(err)
 						}
 
-						if _, err := e.opt.Images.Create(ctx, img); err != nil {
+						if _, err := e.opt.Images.Create(imageClientCtx, img); err != nil {
 							return nil, nil, tagDone(err)
 						}
 					}

go.mod

@@ -5,6 +5,7 @@ go 1.20
 require (
 	github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.1.0
 	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v0.4.1
+	github.com/Masterminds/semver/v3 v3.1.0
 	github.com/Microsoft/go-winio v0.6.1
 	github.com/Microsoft/hcsshim v0.10.0-rc.8
 	github.com/agext/levenshtein v1.2.3

go.sum

@@ -124,6 +124,7 @@ github.com/GoogleCloudPlatform/cloudsql-proxy v0.0.0-20191009163259-e802c2cb94ae
 github.com/GoogleCloudPlatform/k8s-cloud-provider v0.0.0-20190822182118-27a4ced34534/go.mod h1:iroGtC8B3tQiqtds1l+mgk/BBOrxbqjH+eUfFQYRc14=
 github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Masterminds/semver/v3 v3.0.3/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
+github.com/Masterminds/semver/v3 v3.1.0 h1:Y2lUDsFKVRSYGojLJ1yLxSXdMmMYTYls0rCvoqmMUQk=
 github.com/Masterminds/semver/v3 v3.1.0/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
 github.com/Microsoft/go-winio v0.4.11/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
 github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=

util/testutil/integration/sandbox.go

@@ -13,6 +13,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/Masterminds/semver/v3"
+	containerdpkg "github.com/containerd/containerd"
 	"github.com/google/shlex"
 	"github.com/moby/buildkit/util/bklog"
 	"github.com/pkg/errors"
@@ -367,3 +369,31 @@ func CheckFeatureCompat(t *testing.T, sb Sandbox, reason ...string) {
 		t.Skipf("%s worker can not currently run this test due to missing features (%s)", sb.Name(), strings.Join(ereasons, ", "))
 	}
 }
+
+func CheckContainerdVersion(t *testing.T, cdAddress, constraint string) {
+	t.Helper()
+	constraintSemVer, err := semver.NewConstraint(constraint)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cdClient, err := containerdpkg.New(cdAddress, containerdpkg.WithTimeout(60*time.Second))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer cdClient.Close()
+	ctx := context.TODO()
+	cdVersion, err := cdClient.Version(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cdVersionSemVer, err := semver.NewVersion(cdVersion.Version)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !constraintSemVer.Check(cdVersionSemVer) {
+		t.Skipf("containerd version %q does not satisfy the constraint %q", cdVersion.Version, constraint)
+	}
+}