mirror of
https://github.com/containers/podman.git
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8e4a42aa42
Add support for short-name aliasing. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
389 lines
16 KiB
Go
389 lines
16 KiB
Go
package image
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import (
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"context"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"github.com/containers/image/v5/transports"
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"github.com/containers/image/v5/transports/alltransports"
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"github.com/containers/image/v5/types"
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"github.com/containers/storage"
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"github.com/containers/storage/pkg/idtools"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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// newTestRuntime returns a *Runtime implementation and a cleanup function which the caller is expected to call.
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func newTestRuntime(t *testing.T) (*Runtime, func()) {
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wd, err := ioutil.TempDir("", "testStorageRuntime")
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require.NoError(t, err)
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err = os.MkdirAll(wd, 0700)
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require.NoError(t, err)
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store, err := storage.GetStore(storage.StoreOptions{
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RunRoot: filepath.Join(wd, "run"),
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GraphRoot: filepath.Join(wd, "root"),
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GraphDriverName: "vfs",
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GraphDriverOptions: []string{},
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UIDMap: []idtools.IDMap{{
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ContainerID: 0,
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HostID: os.Getuid(),
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Size: 1,
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}},
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GIDMap: []idtools.IDMap{{
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ContainerID: 0,
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HostID: os.Getgid(),
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Size: 1,
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}},
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})
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require.NoError(t, err)
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ir := NewImageRuntimeFromStore(store)
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cleanup := func() { _ = os.RemoveAll(wd) }
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return ir, cleanup
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}
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// storageReferenceWithoutLocation returns ref.StringWithinTransport(),
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// stripping the [store-specification] prefix from containers/image/storage reference format.
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func storageReferenceWithoutLocation(ref types.ImageReference) string {
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res := ref.StringWithinTransport()
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if res[0] == '[' {
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closeIndex := strings.IndexRune(res, ']')
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if closeIndex > 0 {
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res = res[closeIndex+1:]
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}
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}
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return res
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}
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func TestGetPullRefPair(t *testing.T) {
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const imageID = "@0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
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const digestSuffix = "@sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
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ir, cleanup := newTestRuntime(t)
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defer cleanup()
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for _, c := range []struct{ srcName, destName, expectedImage, expectedDstName string }{
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// == Source does not have a Docker reference (as is the case for docker-archive:, oci-archive, dir:); destination formats:
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{ // registry/name, no tag:
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"dir:/dev/this-does-not-exist", "example.com/from-directory",
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"example.com/from-directory", "example.com/from-directory:latest",
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},
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{ // name, no registry, no tag:
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"dir:/dev/this-does-not-exist", "from-directory",
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"localhost/from-directory", "localhost/from-directory:latest",
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},
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{ // registry/name:tag :
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"dir:/dev/this-does-not-exist", "example.com/from-directory:notlatest",
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"example.com/from-directory:notlatest", "example.com/from-directory:notlatest",
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},
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{ // name:tag, no registry:
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"dir:/dev/this-does-not-exist", "from-directory:notlatest",
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"localhost/from-directory:notlatest", "localhost/from-directory:notlatest",
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},
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{ // name@digest, no registry:
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"dir:/dev/this-does-not-exist", "from-directory" + digestSuffix,
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"localhost/from-directory" + digestSuffix, "localhost/from-directory" + digestSuffix,
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},
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{ // registry/name@digest:
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"dir:/dev/this-does-not-exist", "example.com/from-directory" + digestSuffix,
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"example.com/from-directory" + digestSuffix, "example.com/from-directory" + digestSuffix,
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},
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{ // ns/name:tag, no registry:
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"dir:/dev/this-does-not-exist", "ns/from-directory:notlatest",
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"localhost/ns/from-directory:notlatest", "localhost/ns/from-directory:notlatest",
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},
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{ // containers-storage image ID
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"dir:/dev/this-does-not-exist", imageID,
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imageID, imageID,
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},
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// == Source does have a Docker reference.
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// In that case getPullListFromRef uses the full transport:name input as a destName,
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// which would be invalid in the returned dstName - but dstName is derived from the source, so it does not really matter _so_ much.
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// Note that unlike real-world use we use different :source and :destination to verify the data flow in more detail.
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{ // registry/name:tag
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"docker://example.com/busybox:source", "docker://example.com/busybox:destination",
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"docker://example.com/busybox:destination", "example.com/busybox:source",
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},
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{ // Implied docker.io/library and :latest
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"docker://busybox", "docker://busybox:destination",
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"docker://busybox:destination", "docker.io/library/busybox:latest",
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},
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// == Invalid destination format.
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{"tarball:/dev/null", "tarball:/dev/null", "", ""},
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} {
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testDescription := fmt.Sprintf("%#v %#v", c.srcName, c.destName)
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srcRef, err := alltransports.ParseImageName(c.srcName)
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require.NoError(t, err, testDescription)
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res, err := ir.getPullRefPair(srcRef, c.destName)
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if c.expectedDstName == "" {
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assert.Error(t, err, testDescription)
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} else {
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require.NoError(t, err, testDescription)
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assert.Equal(t, c.expectedImage, res.image, testDescription)
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assert.Equal(t, srcRef, res.srcRef, testDescription)
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assert.Equal(t, c.expectedDstName, storageReferenceWithoutLocation(res.dstRef), testDescription)
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}
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}
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}
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func TestPullGoalFromImageReference(t *testing.T) {
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ir, cleanup := newTestRuntime(t)
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defer cleanup()
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type expected struct{ image, dstName string }
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for _, c := range []struct {
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srcName string
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expected []expected
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expectedPullAllPairs bool
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}{
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// == docker-archive:
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{"docker-archive:/dev/this-does-not-exist", nil, false}, // Input does not exist.
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{"docker-archive:/dev/null", nil, false}, // Input exists but does not contain a manifest.
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// FIXME: The implementation has extra code for len(manifest) == 0?! That will fail in getImageDigest anyway.
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{ // RepoTags is empty
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"docker-archive:testdata/docker-unnamed.tar.xz",
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[]expected{{"@ec9293436c2e66da44edb9efb8d41f6b13baf62283ebe846468bc992d76d7951", "@ec9293436c2e66da44edb9efb8d41f6b13baf62283ebe846468bc992d76d7951"}},
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true,
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},
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{ // RepoTags is a [docker.io/library/]name:latest, normalized to the short format.
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"docker-archive:testdata/docker-name-only.tar.xz",
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[]expected{{"localhost/pretty-empty:latest", "localhost/pretty-empty:latest"}},
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true,
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},
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{ // RepoTags is a registry/name:latest
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"docker-archive:testdata/docker-registry-name.tar.xz",
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[]expected{{"example.com/empty:latest", "example.com/empty:latest"}},
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true,
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},
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{ // RepoTags has multiple items for a single image
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"docker-archive:testdata/docker-two-names.tar.xz",
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[]expected{
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{"localhost/pretty-empty:latest", "localhost/pretty-empty:latest"},
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{"example.com/empty:latest", "example.com/empty:latest"},
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},
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true,
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},
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{ // Reference image by name in multi-image archive
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"docker-archive:testdata/docker-two-images.tar.xz:example.com/empty:latest",
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[]expected{
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{"example.com/empty:latest", "example.com/empty:latest"},
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},
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true,
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},
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{ // Reference image by name in multi-image archive
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"docker-archive:testdata/docker-two-images.tar.xz:example.com/empty/but:different",
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[]expected{
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{"example.com/empty/but:different", "example.com/empty/but:different"},
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},
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true,
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},
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{ // Reference image by index in multi-image archive
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"docker-archive:testdata/docker-two-images.tar.xz:@0",
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[]expected{
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{"example.com/empty:latest", "example.com/empty:latest"},
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},
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true,
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},
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{ // Reference image by index in multi-image archive
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"docker-archive:testdata/docker-two-images.tar.xz:@1",
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[]expected{
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{"example.com/empty/but:different", "example.com/empty/but:different"},
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},
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true,
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},
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{ // Reference entire multi-image archive must fail (more than one manifest)
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"docker-archive:testdata/docker-two-images.tar.xz",
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[]expected{},
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true,
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},
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// == oci-archive:
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{"oci-archive:/dev/this-does-not-exist", nil, false}, // Input does not exist.
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{"oci-archive:/dev/null", nil, false}, // Input exists but does not contain a manifest.
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// FIXME: The remaining tests are commented out for now, because oci-archive: does not work unprivileged.
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// { // No name annotation
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// "oci-archive:testdata/oci-unnamed.tar.gz",
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// []expected{{"@5c8aca8137ac47e84c69ae93ce650ce967917cc001ba7aad5494073fac75b8b6", "@5c8aca8137ac47e84c69ae93ce650ce967917cc001ba7aad5494073fac75b8b6"}},
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// false,
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// },
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// { // Name is a name:latest (no normalization is defined).
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// "oci-archive:testdata/oci-name-only.tar.gz",
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// []expected{{"localhost/pretty-empty:latest", "localhost/pretty-empty:latest"}},
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// false,
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// },
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// { // Name is a registry/name:latest
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// "oci-archive:testdata/oci-registry-name.tar.gz",
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// []expected{{"example.com/empty:latest", "example.com/empty:latest"}},
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// false,
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// },
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// // Name exists, but is an invalid Docker reference; such names will fail when creating dstReference.
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// {"oci-archive:testdata/oci-non-docker-name.tar.gz", nil, false},
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// Maybe test support of two images in a single archive? It should be transparently handled by adding a reference to srcRef.
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// == dir:
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{ // Absolute path
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"dir:/dev/this-does-not-exist",
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[]expected{{"localhost/dev/this-does-not-exist", "localhost/dev/this-does-not-exist:latest"}},
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false,
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},
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{ // Relative path, single element.
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"dir:this-does-not-exist",
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[]expected{{"localhost/this-does-not-exist", "localhost/this-does-not-exist:latest"}},
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false,
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},
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{ // Relative path, multiple elements.
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"dir:testdata/this-does-not-exist",
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[]expected{{"localhost/testdata/this-does-not-exist", "localhost/testdata/this-does-not-exist:latest"}},
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false,
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},
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// == Others, notably:
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// === docker:// (has ImageReference.DockerReference)
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{ // Fully-specified input
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"docker://docker.io/library/busybox:latest",
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[]expected{{"docker://docker.io/library/busybox:latest", "docker.io/library/busybox:latest"}},
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false,
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},
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{ // Minimal form of the input
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"docker://busybox",
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[]expected{{"docker://busybox", "docker.io/library/busybox:latest"}},
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false,
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},
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// === tarball: (as an example of what happens when ImageReference.DockerReference is nil).
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// FIXME? This tries to parse "tarball:/dev/null" as a storageReference, and fails.
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// (This is NOT an API promise that the results will continue to be this way.)
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{"tarball:/dev/null", nil, false},
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} {
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srcRef, err := alltransports.ParseImageName(c.srcName)
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require.NoError(t, err, c.srcName)
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res, err := ir.pullGoalFromImageReference(context.Background(), srcRef, c.srcName, nil)
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if len(c.expected) == 0 {
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assert.Error(t, err, c.srcName)
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} else {
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require.NoError(t, err, c.srcName)
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require.Len(t, res.refPairs, len(c.expected), c.srcName)
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for i, e := range c.expected {
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testDescription := fmt.Sprintf("%s #%d", c.srcName, i)
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assert.Equal(t, e.image, res.refPairs[i].image, testDescription)
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assert.Equal(t, transports.ImageName(srcRef), transports.ImageName(res.refPairs[i].srcRef), testDescription)
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assert.Equal(t, e.dstName, storageReferenceWithoutLocation(res.refPairs[i].dstRef), testDescription)
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}
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assert.Equal(t, c.expectedPullAllPairs, res.pullAllPairs, c.srcName)
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}
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}
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}
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const registriesConfWithSearch = `unqualified-search-registries = ['example.com', 'docker.io']`
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func TestPullGoalFromPossiblyUnqualifiedName(t *testing.T) {
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const digestSuffix = "@sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
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type pullRefStrings struct{ image, srcRef, dstName string } // pullRefPair with string data only
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registriesConf, err := ioutil.TempFile("", "TestPullGoalFromPossiblyUnqualifiedName")
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require.NoError(t, err)
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defer registriesConf.Close()
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defer os.Remove(registriesConf.Name())
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err = ioutil.WriteFile(registriesConf.Name(), []byte(registriesConfWithSearch), 0600)
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require.NoError(t, err)
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ir, cleanup := newTestRuntime(t)
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defer cleanup()
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sc := GetSystemContext("", "", false)
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aliasesConf, err := ioutil.TempFile("", "short-name-aliases.conf")
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require.NoError(t, err)
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defer aliasesConf.Close()
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defer os.Remove(aliasesConf.Name())
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sc.UserShortNameAliasConfPath = aliasesConf.Name()
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sc.SystemRegistriesConfPath = registriesConf.Name()
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for _, c := range []struct {
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input string
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expected []pullRefStrings
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}{
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{"#", nil}, // Clearly invalid.
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{ // Fully-explicit docker.io, name-only.
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"docker.io/library/busybox",
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// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
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[]pullRefStrings{{"docker.io/library/busybox:latest", "docker://busybox:latest", "docker.io/library/busybox:latest"}},
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},
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{ // docker.io with implied /library/, name-only.
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"docker.io/busybox",
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// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
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[]pullRefStrings{{"docker.io/library/busybox:latest", "docker://busybox:latest", "docker.io/library/busybox:latest"}},
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},
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{ // Qualified example.com, name-only.
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"example.com/ns/busybox",
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[]pullRefStrings{{"example.com/ns/busybox:latest", "docker://example.com/ns/busybox:latest", "example.com/ns/busybox:latest"}},
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},
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{ // Qualified example.com, name:tag.
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"example.com/ns/busybox:notlatest",
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[]pullRefStrings{{"example.com/ns/busybox:notlatest", "docker://example.com/ns/busybox:notlatest", "example.com/ns/busybox:notlatest"}},
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},
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{ // Qualified example.com, name@digest.
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"example.com/ns/busybox" + digestSuffix,
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[]pullRefStrings{{"example.com/ns/busybox" + digestSuffix, "docker://example.com/ns/busybox" + digestSuffix,
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"example.com/ns/busybox" + digestSuffix}},
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},
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// Qualified example.com, name:tag@digest. This code is happy to try, but .srcRef parsing currently rejects such input.
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{"example.com/ns/busybox:notlatest" + digestSuffix, nil},
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{ // Unqualified, single-name, name-only
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"busybox",
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[]pullRefStrings{
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{"example.com/busybox:latest", "docker://example.com/busybox:latest", "example.com/busybox:latest"},
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// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
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{"docker.io/library/busybox:latest", "docker://busybox:latest", "docker.io/library/busybox:latest"},
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},
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},
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{ // Unqualified, namespaced, name-only
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"ns/busybox",
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[]pullRefStrings{
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{"example.com/ns/busybox:latest", "docker://example.com/ns/busybox:latest", "example.com/ns/busybox:latest"},
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},
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},
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{ // Unqualified, name:tag
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"busybox:notlatest",
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[]pullRefStrings{
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{"example.com/busybox:notlatest", "docker://example.com/busybox:notlatest", "example.com/busybox:notlatest"},
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// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
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{"docker.io/library/busybox:notlatest", "docker://busybox:notlatest", "docker.io/library/busybox:notlatest"},
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},
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},
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{ // Unqualified, name@digest
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"busybox" + digestSuffix,
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[]pullRefStrings{
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{"example.com/busybox" + digestSuffix, "docker://example.com/busybox" + digestSuffix, "example.com/busybox" + digestSuffix},
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// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
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{"docker.io/library/busybox" + digestSuffix, "docker://busybox" + digestSuffix, "docker.io/library/busybox" + digestSuffix},
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},
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},
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// Unqualified, name:tag@digest. This code is happy to try, but .srcRef parsing currently rejects such input.
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{"busybox:notlatest" + digestSuffix, nil},
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} {
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res, err := ir.pullGoalFromPossiblyUnqualifiedName(sc, nil, c.input)
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if len(c.expected) == 0 {
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assert.Error(t, err, c.input)
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} else {
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assert.NoError(t, err, c.input)
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for i, e := range c.expected {
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testDescription := fmt.Sprintf("%s #%d (%v)", c.input, i, res.refPairs)
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assert.Equal(t, e.image, res.refPairs[i].image, testDescription)
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assert.Equal(t, e.srcRef, transports.ImageName(res.refPairs[i].srcRef), testDescription)
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assert.Equal(t, e.dstName, storageReferenceWithoutLocation(res.refPairs[i].dstRef), testDescription)
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}
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assert.False(t, res.pullAllPairs, c.input)
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}
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}
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}
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