diff --git a/test/e2e/pull_chunked_test.go b/test/e2e/pull_chunked_test.go new file mode 100644 index 0000000000..a99439f310 --- /dev/null +++ b/test/e2e/pull_chunked_test.go @@ -0,0 +1,393 @@ +//go:build linux || freebsd + +package integration + +import ( + "encoding/hex" + "encoding/json" + "fmt" + "os" + "path/filepath" + "regexp" + "slices" + "strings" + + . "github.com/containers/podman/v5/test/utils" + . "github.com/onsi/ginkgo/v2" + . "github.com/onsi/gomega" + . "github.com/onsi/gomega/gexec" + "github.com/opencontainers/go-digest" + imgspecv1 "github.com/opencontainers/image-spec/specs-go/v1" +) + +func pullChunkedTests() { // included in pull_test.go + if podmanTest.ImageCacheFS == "vfs" { + Skip("VFS does not support chunked pulls") // We could still test that we enforce DiffID correctness. + } + if os.Getenv("CI_DESIRED_COMPOSEFS") != "" { + // With convert_images, we use the partial pulls for all layers, and do not exercise the full pull code path. + Skip("The composefs configuration (with convert_images = true) interferes with this test's image ID expectations") + } + SkipIfRemote("(podman system reset) is required for this test") + if isRootless() { + err := podmanTest.RestoreArtifact(REGISTRY_IMAGE) + Expect(err).ToNot(HaveOccurred()) + } + lock := GetPortLock(pullChunkedRegistryPort) + defer lock.Unlock() + + pullChunkedRegistryPrefix := "docker://localhost:" + pullChunkedRegistryPort + "/" + + imageDir := filepath.Join(tempdir, "images") + err := os.MkdirAll(imageDir, 0o700) + Expect(err).NotTo(HaveOccurred()) + + // Prepare test images. + pullChunkedStartRegistry() + chunkedNormal := &pullChunkedTestImage{ + registryRef: pullChunkedRegistryPrefix + "chunked-normal", + dirPath: filepath.Join(imageDir, "chunked-normal"), + } + podmanTest.PodmanExitCleanly("pull", "-q", ALPINE) + podmanTest.PodmanExitCleanly("push", "-q", "--tls-verify=false", "--force-compression", "--compression-format=zstd:chunked", ALPINE, chunkedNormal.registryRef) + skopeo := SystemExec("skopeo", []string{"copy", "-q", "--preserve-digests", "--all", "--src-tls-verify=false", chunkedNormal.registryRef, "dir:" + chunkedNormal.dirPath}) + skopeo.WaitWithDefaultTimeout() + Expect(skopeo).Should(ExitCleanly()) + jq := SystemExec("jq", []string{"-r", ".config.digest", filepath.Join(chunkedNormal.dirPath, "manifest.json")}) + jq.WaitWithDefaultTimeout() + Expect(jq).Should(ExitCleanly()) + cd, err := digest.Parse(jq.OutputToString()) + Expect(err).NotTo(HaveOccurred()) + chunkedNormal.configDigest = cd + + schema1 := &pullChunkedTestImage{ + registryRef: pullChunkedRegistryPrefix + "schema1", + dirPath: filepath.Join(imageDir, "schema1"), + configDigest: "", + } + skopeo = SystemExec("skopeo", []string{"copy", "-q", "--format=v2s1", "--dest-compress=true", "--dest-compress-format=gzip", "dir:" + chunkedNormal.dirPath, "dir:" + schema1.dirPath}) + skopeo.WaitWithDefaultTimeout() + Expect(skopeo).Should(ExitCleanly()) + + createChunkedImage := func(name string, editDiffIDs func([]digest.Digest) []digest.Digest) *pullChunkedTestImage { + name = "chunked-" + name + res := pullChunkedTestImage{ + registryRef: pullChunkedRegistryPrefix + name, + dirPath: filepath.Join(imageDir, name), + } + cmd := SystemExec("cp", []string{"-a", chunkedNormal.dirPath, res.dirPath}) + cmd.WaitWithDefaultTimeout() + Expect(cmd).Should(ExitCleanly()) + + configBytes, err := os.ReadFile(filepath.Join(chunkedNormal.dirPath, chunkedNormal.configDigest.Encoded())) + Expect(err).NotTo(HaveOccurred()) + configBytes = editJSON(configBytes, func(config *imgspecv1.Image) { + config.RootFS.DiffIDs = editDiffIDs(config.RootFS.DiffIDs) + }) + res.configDigest = digest.FromBytes(configBytes) + err = os.WriteFile(filepath.Join(res.dirPath, res.configDigest.Encoded()), configBytes, 0o600) + Expect(err).NotTo(HaveOccurred()) + + manifestBytes, err := os.ReadFile(filepath.Join(chunkedNormal.dirPath, "manifest.json")) + Expect(err).NotTo(HaveOccurred()) + manifestBytes = editJSON(manifestBytes, func(manifest *imgspecv1.Manifest) { + manifest.Config.Digest = res.configDigest + manifest.Config.Size = int64(len(configBytes)) + }) + err = os.WriteFile(filepath.Join(res.dirPath, "manifest.json"), manifestBytes, 0o600) + Expect(err).NotTo(HaveOccurred()) + + return &res + } + createNonchunkedImage := func(name string, input *pullChunkedTestImage) *pullChunkedTestImage { + name = "nonchunked-" + name + res := pullChunkedTestImage{ + registryRef: pullChunkedRegistryPrefix + name, + dirPath: filepath.Join(imageDir, name), + configDigest: input.configDigest, + } + cmd := SystemExec("cp", []string{"-a", input.dirPath, res.dirPath}) + cmd.WaitWithDefaultTimeout() + Expect(cmd).Should(ExitCleanly()) + + manifestBytes, err := os.ReadFile(filepath.Join(input.dirPath, "manifest.json")) + Expect(err).NotTo(HaveOccurred()) + manifestBytes = editJSON(manifestBytes, func(manifest *imgspecv1.Manifest) { + manifest.Layers = slices.Clone(manifest.Layers) + for i := range manifest.Layers { + delete(manifest.Layers[i].Annotations, "io.github.containers.zstd-chunked.manifest-checksum") + } + }) + err = os.WriteFile(filepath.Join(res.dirPath, "manifest.json"), manifestBytes, 0o600) + Expect(err).NotTo(HaveOccurred()) + + return &res + } + chunkedMismatch := createChunkedImage("mismatch", func(diffIDs []digest.Digest) []digest.Digest { + modified := slices.Clone(diffIDs) + digestBytes, err := hex.DecodeString(diffIDs[0].Encoded()) + Expect(err).NotTo(HaveOccurred()) + digestBytes[len(digestBytes)-1] ^= 1 + modified[0] = digest.NewDigestFromEncoded(diffIDs[0].Algorithm(), hex.EncodeToString(digestBytes)) + return modified + }) + chunkedMissing := createChunkedImage("missing", func(diffIDs []digest.Digest) []digest.Digest { + return nil + }) + chunkedEmpty := createChunkedImage("empty", func(diffIDs []digest.Digest) []digest.Digest { + res := make([]digest.Digest, len(diffIDs)) + for i := range res { + res[i] = "" + } + return res + }) + nonchunkedNormal := createNonchunkedImage("normal", chunkedNormal) + nonchunkedMismatch := createNonchunkedImage("mismatch", chunkedMismatch) + nonchunkedMissing := createNonchunkedImage("missing", chunkedMissing) + nonchunkedEmpty := createNonchunkedImage("empty", chunkedEmpty) + pullChunkedStopRegistry() + + // The actual test + for _, c := range []struct { + img *pullChunkedTestImage + insecureStorage bool + fresh pullChunkedExpectation + reuse pullChunkedExpectation + onSuccess []string + onFailure []string + }{ + // == Pulls of chunked images + { + img: chunkedNormal, + fresh: pullChunkedExpectation{success: []string{"Created zstd:chunked differ for blob"}}, // Is a partial pull + reuse: pullChunkedExpectation{success: []string{"Skipping blob .*already present"}}, + }, + { + img: chunkedMismatch, + fresh: pullChunkedExpectation{failure: []string{ + "Created zstd:chunked differ for blob", // Is a partial pull + "partial pull of blob.*uncompressed digest of layer.*is.*config claims", + }}, + reuse: pullChunkedExpectation{failure: []string{"trying to reuse blob.*layer.*does not match config's DiffID"}}, + }, + { + img: chunkedMissing, + fresh: pullChunkedExpectation{success: []string{ + "Failed to retrieve partial blob: DiffID value for layer .* is unknown or explicitly empty", // Partial pull rejected + "Detected compression format zstd", // Non-partial pull happens + }}, + reuse: pullChunkedExpectation{success: []string{ + "Not using TOC .* to look for layer reuse: DiffID value for layer .* is unknown or explicitly empty", // Partial pull reuse rejected + "Skipping blob .*already present", // Non-partial reuse happens + }}, + }, + { + img: chunkedEmpty, + fresh: pullChunkedExpectation{success: []string{ + "Failed to retrieve partial blob: DiffID value for layer .* is unknown or explicitly empty", // Partial pull rejected + "Detected compression format zstd", // Non-partial pull happens + }}, + reuse: pullChunkedExpectation{success: []string{ + "Not using TOC .* to look for layer reuse: DiffID value for layer .* is unknown or explicitly empty", // Partial pull reuse rejected + "Skipping blob .*already present", // Non-partial reuse happens + }}, + }, + // == Pulls of images without zstd-chunked metadata (although the layer files are actually zstd:chunked, so blob digest match chunkedNormal and trigger reuse) + { + img: nonchunkedNormal, + fresh: pullChunkedExpectation{success: []string{ + "Failed to retrieve partial blob: no TOC found and convert_images is not configured", // Partial pull not possible + "Detected compression format zstd", // Non-partial pull happens + }}, + reuse: pullChunkedExpectation{success: []string{"Skipping blob .*already present"}}, + }, + { + img: nonchunkedMismatch, + fresh: pullChunkedExpectation{failure: []string{ + "Failed to retrieve partial blob: no TOC found and convert_images is not configured", // Partial pull not possible + "Detected compression format zstd", // Non-partial pull happens + "writing blob: layer .* does not match config's DiffID", + }}, + reuse: pullChunkedExpectation{failure: []string{"trying to reuse blob.*layer.*does not match config's DiffID"}}, + }, + { + img: nonchunkedMissing, + fresh: pullChunkedExpectation{success: []string{ + "Failed to retrieve partial blob: no TOC found and convert_images is not configured", // Partial pull not possible + "Detected compression format zstd", // Non-partial pull happens + }}, + reuse: pullChunkedExpectation{success: []string{"Skipping blob .*already present"}}, // Non-partial reuse happens + }, + { + img: nonchunkedEmpty, + fresh: pullChunkedExpectation{success: []string{ + "Failed to retrieve partial blob: no TOC found and convert_images is not configured", // Partial pull not possible + "Detected compression format zstd", // Non-partial pull happens + }}, + reuse: pullChunkedExpectation{success: []string{"Skipping blob .*already present"}}, // Non-partial reuse happens + }, + // == Pulls of chunked images with insecure_allow_unpredictable_image_contents + // NOTE: This tests current behavior, but we don't promise users that insecure_allow_unpredictable_image_contents is any faster + // nor that it sets any particular image IDs. + { + img: chunkedNormal, + insecureStorage: true, + fresh: pullChunkedExpectation{success: []string{ + "Created zstd:chunked differ for blob", // Is a partial pull + "Ordinary storage image ID .*; a layer was looked up by TOC, so using image ID .*", + }}, + reuse: pullChunkedExpectation{success: []string{ + "Skipping blob .*already present", + "Ordinary storage image ID .*; a layer was looked up by TOC, so using image ID .*", + }}, + }, + { + // WARNING: It happens to be the case that with insecure_allow_unpredictable_image_contents , images with non-matching DiffIDs + // can be pulled in these situations. + // WE ARE MAKING NO PROMISES THAT THEY WILL WORK. The images are invalid and need to be fixed. + // Today, in other situations (e.g. after pulling nonchunkedNormal), c/image will know the uncompressed digest despite insecure_allow_unpredictable_image_contents, + // and reject the image as not matching the config. + // As implementations change, the conditions when images with invalid DiffIDs will / will not work may also change, without + // notice. + img: chunkedMismatch, + insecureStorage: true, + fresh: pullChunkedExpectation{success: []string{ + "Created zstd:chunked differ for blob", // Is a partial pull + "Ordinary storage image ID .*; a layer was looked up by TOC, so using image ID .*", + }}, + reuse: pullChunkedExpectation{success: []string{ + "Skipping blob .*already present", + "Ordinary storage image ID .*; a layer was looked up by TOC, so using image ID .*", + }}, + }, + { + img: chunkedMissing, + insecureStorage: true, + fresh: pullChunkedExpectation{success: []string{ + "Failed to retrieve partial blob: DiffID value for layer .* is unknown or explicitly empty", // Partial pull rejected (the storage option does not actually make a difference) + "Detected compression format zstd", // Non-partial pull happens + }}, + reuse: pullChunkedExpectation{success: []string{ + "Not using TOC .* to look for layer reuse: DiffID value for layer .* is unknown or explicitly empty", // Partial pull reuse rejected (the storage option does not actually make a difference) + "Skipping blob .*already present", // Non-partial reuse happens + }}, + }, + { + img: chunkedEmpty, + insecureStorage: true, + fresh: pullChunkedExpectation{success: []string{ + "Failed to retrieve partial blob: DiffID value for layer .* is unknown or explicitly empty", // Partial pull rejected (the storage option does not actually make a difference) + "Detected compression format zstd", // Non-partial pull happens + }}, + reuse: pullChunkedExpectation{success: []string{ + "Not using TOC .* to look for layer reuse: DiffID value for layer .* is unknown or explicitly empty", // Partial pull reuse rejected (the storage option does not actually make a difference) + "Skipping blob .*already present", // Non-partial reuse happens + }}, + }, + // Schema1 + { + img: schema1, + fresh: pullChunkedExpectation{success: []string{ + "Failed to retrieve partial blob: no TOC found and convert_images is not configured", // Partial pull not possible + "Detected compression format gzip", // Non-partial pull happens + }}, + reuse: pullChunkedExpectation{success: []string{"Skipping blob .*already present"}}, + }, + // == No tests of estargz images (Podman can’t create them) + } { + if c.insecureStorage { + GinkgoWriter.Printf("===\n===Testing %s with insecure config\n===\n", c.img.registryRef) + } else { + GinkgoWriter.Printf("===\n===Testing %s\n===\n", c.img.registryRef) + } + + // Do each test with a clean slate: no layer metadata known, no blob info cache. + // Annoyingly, we have to re-start and re-populate the registry as well. + podmanTest.PodmanExitCleanly("system", "reset", "-f") + + pullChunkedStartRegistry() + c.img.push() + chunkedNormal.push() + + // Test fresh pull + c.fresh.testPull(c.img, c.insecureStorage) + + podmanTest.PodmanExitCleanly("--pull-option=enable_partial_images=true", fmt.Sprintf("--pull-option=insecure_allow_unpredictable_image_contents=%v", c.insecureStorage), + "pull", "-q", "--tls-verify=false", chunkedNormal.registryRef) + + // Test pull after chunked layers are already known, to trigger the layer reuse code + c.reuse.testPull(c.img, c.insecureStorage) + + pullChunkedStopRegistry() + } +} + +const pullChunkedRegistryPort = "5013" + +// pullChunkedStartRegistry creates a registry listening at pullChunkedRegistryPort within the current Podman environment. +func pullChunkedStartRegistry() { + podmanTest.PodmanExitCleanly("run", "-d", "--name", "registry", "--rm", "-p", pullChunkedRegistryPort+":5000", "-e", "REGISTRY_COMPATIBILITY_SCHEMA1_ENABLED=true", REGISTRY_IMAGE, "/entrypoint.sh", "/etc/docker/registry/config.yml") + if !WaitContainerReady(podmanTest, "registry", "listening on", 20, 1) { + Fail("Cannot start docker registry.") + } +} + +// pullChunkedStopRegistry stops a registry started by pullChunkedStartRegistry. +func pullChunkedStopRegistry() { + podmanTest.PodmanExitCleanly("stop", "registry") +} + +// pullChunkedTestImage centralizes data about a single test image in pullChunkedTests. +type pullChunkedTestImage struct { + registryRef, dirPath string + configDigest digest.Digest // "" for a schema1 image +} + +// push copies the image from dirPath to registryRef. +func (img *pullChunkedTestImage) push() { + skopeo := SystemExec("skopeo", []string{"copy", "-q", fmt.Sprintf("--preserve-digests=%v", img.configDigest != ""), "--all", "--dest-tls-verify=false", "dir:" + img.dirPath, img.registryRef}) + skopeo.WaitWithDefaultTimeout() + Expect(skopeo).Should(ExitCleanly()) +} + +// pullChunkedExpectations records the expected output of a single "podman pull" command. +type pullChunkedExpectation struct { + success []string // Expected debug log strings; should succeed if != nil + failure []string // Expected debug log strings; should fail if != nil +} + +// testPull performs one pull +func (expectation *pullChunkedExpectation) testPull(image *pullChunkedTestImage, insecureStorage bool) { + session := podmanTest.Podman([]string{"--log-level=debug", "--pull-option=enable_partial_images=true", fmt.Sprintf("--pull-option=insecure_allow_unpredictable_image_contents=%v", insecureStorage), + "pull", "--tls-verify=false", image.registryRef}) + session.WaitWithDefaultTimeout() + GinkgoWriter.Printf("Pull exit code: %v\n", session.ExitCode()) + log := session.ErrorToString() + if expectation.success != nil { + Expect(session).Should(Exit(0)) + for _, s := range expectation.success { + Expect(regexp.MatchString(".*"+s+".*", log)).To(BeTrue(), s) + } + + if image.configDigest != "" && !insecureStorage { + s2 := podmanTest.PodmanExitCleanly("image", "inspect", "--format={{.ID}}", strings.TrimPrefix(image.registryRef, "docker://")) + Expect(s2.OutputToString()).Should(Equal(image.configDigest.Encoded())) + } + } else { + Expect(session).Should(Exit(125)) + for _, s := range expectation.failure { + Expect(regexp.MatchString(".*"+s+".*", log)).To(BeTrue(), s) + } + } +} + +// editJSON modifies a JSON-formatted input using the provided edit function. +func editJSON[T any](input []byte, edit func(*T)) []byte { + var value T + err = json.Unmarshal(input, &value) + Expect(err).NotTo(HaveOccurred()) + edit(&value) + res, err := json.Marshal(value) + Expect(err).NotTo(HaveOccurred()) + return res +} diff --git a/test/e2e/pull_test.go b/test/e2e/pull_test.go index 34930c03ce..3fe3179e59 100644 --- a/test/e2e/pull_test.go +++ b/test/e2e/pull_test.go @@ -318,6 +318,8 @@ var _ = Describe("Podman pull", func() { Expect(session).Should(ExitCleanly()) }) + It("podman pull chunked images", pullChunkedTests) + It("podman pull from docker-archive", func() { SkipIfRemote("podman-remote does not support pulling from docker-archive")