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-rw-r--r--libpod/image/image.go28
-rw-r--r--libpod/image/pull.go129
-rw-r--r--libpod/image/pull_test.go67
3 files changed, 104 insertions, 120 deletions
diff --git a/libpod/image/image.go b/libpod/image/image.go
index 301954703..cecd64eb7 100644
--- a/libpod/image/image.go
+++ b/libpod/image/image.go
@@ -24,6 +24,7 @@ import (
"github.com/containers/image/v5/manifest"
ociarchive "github.com/containers/image/v5/oci/archive"
"github.com/containers/image/v5/oci/layout"
+ "github.com/containers/image/v5/pkg/shortnames"
is "github.com/containers/image/v5/storage"
"github.com/containers/image/v5/tarball"
"github.com/containers/image/v5/transports"
@@ -164,7 +165,7 @@ func (ir *Runtime) New(ctx context.Context, name, signaturePolicyPath, authfile
}
imageName, err := ir.pullImageFromHeuristicSource(ctx, name, writer, authfile, signaturePolicyPath, signingoptions, dockeroptions, &retry.RetryOptions{MaxRetry: maxRetry}, label)
if err != nil {
- return nil, errors.Wrapf(err, "unable to pull %s", name)
+ return nil, err
}
newImage, err := ir.NewFromLocal(imageName[0])
@@ -318,10 +319,8 @@ func (ir *Runtime) LoadAllImagesFromDockerArchive(ctx context.Context, fileName
}
goal := pullGoal{
- pullAllPairs: true,
- usedSearchRegistries: false,
- refPairs: refPairs,
- searchedRegistries: nil,
+ pullAllPairs: true,
+ refPairs: refPairs,
}
defer goal.cleanUp()
@@ -456,22 +455,19 @@ func (ir *Runtime) getLocalImage(inputName string) (string, *storage.Image, erro
return "", nil, errors.Wrapf(ErrNoSuchImage, imageError)
}
- // "Short-name image", so let's try out certain prefixes:
- // 1) DefaultLocalRegistry (i.e., "localhost/)
- // 2) Unqualified-search registries from registries.conf
- unqualifiedSearchRegistries, err := registries.GetRegistries()
+ sys := &types.SystemContext{
+ SystemRegistriesConfPath: registries.SystemRegistriesConfPath(),
+ }
+
+ candidates, err := shortnames.ResolveLocally(sys, inputName)
if err != nil {
return "", nil, err
}
- for _, candidate := range append([]string{DefaultLocalRegistry}, unqualifiedSearchRegistries...) {
- ref, err := decomposedImage.referenceWithRegistry(candidate)
- if err != nil {
- return "", nil, err
- }
- img, err := ir.store.Image(reference.TagNameOnly(ref).String())
+ for _, candidate := range candidates {
+ img, err := ir.store.Image(candidate.String())
if err == nil {
- return ref.String(), img, nil
+ return candidate.String(), img, nil
}
}
diff --git a/libpod/image/pull.go b/libpod/image/pull.go
index 65acdf427..2a2d16252 100644
--- a/libpod/image/pull.go
+++ b/libpod/image/pull.go
@@ -4,6 +4,7 @@ import (
"context"
"fmt"
"io"
+ "os"
"path/filepath"
"strings"
@@ -15,13 +16,14 @@ import (
dockerarchive "github.com/containers/image/v5/docker/archive"
ociarchive "github.com/containers/image/v5/oci/archive"
oci "github.com/containers/image/v5/oci/layout"
+ "github.com/containers/image/v5/pkg/shortnames"
is "github.com/containers/image/v5/storage"
"github.com/containers/image/v5/transports"
"github.com/containers/image/v5/transports/alltransports"
"github.com/containers/image/v5/types"
"github.com/containers/podman/v2/libpod/events"
+ "github.com/containers/podman/v2/pkg/errorhandling"
"github.com/containers/podman/v2/pkg/registries"
- "github.com/hashicorp/go-multierror"
"github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
@@ -56,9 +58,10 @@ var (
// pullRefPair records a pair of prepared image references to pull.
type pullRefPair struct {
- image string
- srcRef types.ImageReference
- dstRef types.ImageReference
+ image string
+ srcRef types.ImageReference
+ dstRef types.ImageReference
+ resolvedShortname *shortnames.PullCandidate // if set, must be recorded after successful pull
}
// cleanUpFunc is a function prototype for clean-up functions.
@@ -66,11 +69,11 @@ type cleanUpFunc func() error
// pullGoal represents the prepared image references and decided behavior to be executed by imagePull
type pullGoal struct {
- refPairs []pullRefPair
- pullAllPairs bool // Pull all refPairs instead of stopping on first success.
- usedSearchRegistries bool // refPairs construction has depended on registries.GetRegistries()
- searchedRegistries []string // The list of search registries used; set only if usedSearchRegistries
- cleanUpFuncs []cleanUpFunc // Mainly used to close long-lived objects (e.g., an archive.Reader)
+ refPairs []pullRefPair
+ pullAllPairs bool // Pull all refPairs instead of stopping on first success.
+ cleanUpFuncs []cleanUpFunc // Mainly used to close long-lived objects (e.g., an archive.Reader)
+ shortName string // Set when pulling a short name
+ resolved *shortnames.Resolved // Set when pulling a short name
}
// cleanUp invokes all cleanUpFuncs. Certain resources may not be available
@@ -86,10 +89,8 @@ func (p *pullGoal) cleanUp() {
// singlePullRefPairGoal returns a no-frills pull goal for the specified reference pair.
func singlePullRefPairGoal(rp pullRefPair) *pullGoal {
return &pullGoal{
- refPairs: []pullRefPair{rp},
- pullAllPairs: false, // Does not really make a difference.
- usedSearchRegistries: false,
- searchedRegistries: nil,
+ refPairs: []pullRefPair{rp},
+ pullAllPairs: false, // Does not really make a difference.
}
}
@@ -193,11 +194,9 @@ func (ir *Runtime) pullGoalFromImageReference(ctx context.Context, srcRef types.
}
return &pullGoal{
- pullAllPairs: true,
- usedSearchRegistries: false,
- refPairs: pairs,
- searchedRegistries: nil,
- cleanUpFuncs: []cleanUpFunc{reader.Close},
+ pullAllPairs: true,
+ refPairs: pairs,
+ cleanUpFuncs: []cleanUpFunc{reader.Close},
}, nil
case OCIArchive:
@@ -267,7 +266,7 @@ func (ir *Runtime) pullImageFromHeuristicSource(ctx context.Context, inputName s
if srcTransport != nil && srcTransport.Name() != DockerTransport {
return nil, err
}
- goal, err = ir.pullGoalFromPossiblyUnqualifiedName(inputName)
+ goal, err = ir.pullGoalFromPossiblyUnqualifiedName(sc, writer, inputName)
if err != nil {
return nil, errors.Wrap(err, "error getting default registries to try")
}
@@ -325,7 +324,7 @@ func (ir *Runtime) doPullImage(ctx context.Context, sc *types.SystemContext, goa
var (
images []string
- pullErrors *multierror.Error
+ pullErrors []error
)
for _, imageInfo := range goal.refPairs {
@@ -348,12 +347,17 @@ func (ir *Runtime) doPullImage(ctx context.Context, sc *types.SystemContext, goa
_, err = cp.Image(ctx, policyContext, imageInfo.dstRef, imageInfo.srcRef, copyOptions)
return err
}, retryOptions); err != nil {
- pullErrors = multierror.Append(pullErrors, err)
+ pullErrors = append(pullErrors, err)
logrus.Debugf("Error pulling image ref %s: %v", imageInfo.srcRef.StringWithinTransport(), err)
if writer != nil {
_, _ = io.WriteString(writer, cleanErrorMessage(err))
}
} else {
+ if imageInfo.resolvedShortname != nil {
+ if err := imageInfo.resolvedShortname.Record(); err != nil {
+ logrus.Errorf("Error recording short-name alias %q: %v", imageInfo.resolvedShortname.Value.String(), err)
+ }
+ }
if !goal.pullAllPairs {
ir.newImageEvent(events.Pull, "")
return []string{imageInfo.image}, nil
@@ -361,68 +365,75 @@ func (ir *Runtime) doPullImage(ctx context.Context, sc *types.SystemContext, goa
images = append(images, imageInfo.image)
}
}
- // If no image was found, we should handle. Lets be nicer to the user and see if we can figure out why.
+ // If no image was found, we should handle. Lets be nicer to the user
+ // and see if we can figure out why.
if len(images) == 0 {
- if goal.usedSearchRegistries && len(goal.searchedRegistries) == 0 {
- return nil, errors.Errorf("image name provided is a short name and no search registries are defined in the registries config file.")
- }
- // If the image passed in was fully-qualified, we will have 1 refpair. Bc the image is fq'd, we don't need to yap about registries.
- if !goal.usedSearchRegistries {
- if pullErrors != nil && len(pullErrors.Errors) > 0 { // this should always be true
- return nil, pullErrors.Errors[0]
- }
- return nil, errors.Errorf("unable to pull image, or you do not have pull access")
+ if goal.resolved != nil {
+ return nil, goal.resolved.FormatPullErrors(pullErrors)
}
- return nil, errors.Cause(pullErrors)
- }
- if len(images) > 0 {
- ir.newImageEvent(events.Pull, images[0])
+ return nil, errorhandling.JoinErrors(pullErrors)
}
+
+ ir.newImageEvent(events.Pull, images[0])
return images, nil
}
+// getShortNameMode looks up the `CONTAINERS_SHORT_NAME_ALIASING` environment
+// variable. If it's "on", return `nil` to use the defaults from
+// containers/image and the registries.conf files on the system. If it's
+// "off", empty or unset, return types.ShortNameModeDisabled to turn off
+// short-name aliasing by default.
+//
+// TODO: remove this function once we want to default to short-name aliasing.
+func getShortNameMode() *types.ShortNameMode {
+ env := os.Getenv("CONTAINERS_SHORT_NAME_ALIASING")
+ if strings.ToLower(env) == "on" {
+ return nil // default to whatever registries.conf and c/image decide
+ }
+ mode := types.ShortNameModeDisabled
+ return &mode
+}
+
// pullGoalFromPossiblyUnqualifiedName looks at inputName and determines the possible
// image references to try pulling in combination with the registries.conf file as well
-func (ir *Runtime) pullGoalFromPossiblyUnqualifiedName(inputName string) (*pullGoal, error) {
- decomposedImage, err := decompose(inputName)
+func (ir *Runtime) pullGoalFromPossiblyUnqualifiedName(sys *types.SystemContext, writer io.Writer, inputName string) (*pullGoal, error) {
+ if sys == nil {
+ sys = &types.SystemContext{}
+ }
+ sys.ShortNameMode = getShortNameMode()
+
+ resolved, err := shortnames.Resolve(sys, inputName)
if err != nil {
return nil, err
}
- if decomposedImage.hasRegistry {
- srcRef, err := docker.ParseReference("//" + inputName)
- if err != nil {
- return nil, errors.Wrapf(err, "unable to parse '%s'", inputName)
+ if desc := resolved.Description(); len(desc) > 0 {
+ logrus.Debug(desc)
+ if writer != nil {
+ if _, err := writer.Write([]byte(desc + "\n")); err != nil {
+ return nil, err
+ }
}
- return ir.getSinglePullRefPairGoal(srcRef, inputName)
}
- searchRegistries, err := registries.GetRegistries()
- if err != nil {
- return nil, err
- }
- refPairs := make([]pullRefPair, 0, len(searchRegistries))
- for _, registry := range searchRegistries {
- ref, err := decomposedImage.referenceWithRegistry(registry)
+ refPairs := []pullRefPair{}
+ for i, candidate := range resolved.PullCandidates {
+ srcRef, err := docker.NewReference(candidate.Value)
if err != nil {
return nil, err
}
- imageName := ref.String()
- srcRef, err := docker.ParseReference("//" + imageName)
- if err != nil {
- return nil, errors.Wrapf(err, "unable to parse '%s'", imageName)
- }
- ps, err := ir.getPullRefPair(srcRef, imageName)
+ ps, err := ir.getPullRefPair(srcRef, candidate.Value.String())
if err != nil {
return nil, err
}
+ ps.resolvedShortname = &resolved.PullCandidates[i]
refPairs = append(refPairs, ps)
}
return &pullGoal{
- refPairs: refPairs,
- pullAllPairs: false,
- usedSearchRegistries: true,
- searchedRegistries: searchRegistries,
+ refPairs: refPairs,
+ pullAllPairs: false,
+ shortName: inputName,
+ resolved: resolved,
}, nil
}
diff --git a/libpod/image/pull_test.go b/libpod/image/pull_test.go
index 6cb80e8b5..2e1464ad3 100644
--- a/libpod/image/pull_test.go
+++ b/libpod/image/pull_test.go
@@ -278,15 +278,11 @@ func TestPullGoalFromImageReference(t *testing.T) {
assert.Equal(t, e.dstName, storageReferenceWithoutLocation(res.refPairs[i].dstRef), testDescription)
}
assert.Equal(t, c.expectedPullAllPairs, res.pullAllPairs, c.srcName)
- assert.False(t, res.usedSearchRegistries, c.srcName)
- assert.Nil(t, res.searchedRegistries, c.srcName)
}
}
}
-const registriesConfWithSearch = `[registries.search]
-registries = ['example.com', 'docker.io']
-`
+const registriesConfWithSearch = `unqualified-search-registries = ['example.com', 'docker.io']`
func TestPullGoalFromPossiblyUnqualifiedName(t *testing.T) {
const digestSuffix = "@sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
@@ -303,69 +299,58 @@ func TestPullGoalFromPossiblyUnqualifiedName(t *testing.T) {
ir, cleanup := newTestRuntime(t)
defer cleanup()
- // Environment is per-process, so this looks very unsafe; actually it seems fine because tests are not
- // run in parallel unless they opt in by calling t.Parallel(). So don’t do that.
- oldRCP, hasRCP := os.LookupEnv("REGISTRIES_CONFIG_PATH")
- defer func() {
- if hasRCP {
- os.Setenv("REGISTRIES_CONFIG_PATH", oldRCP)
- } else {
- os.Unsetenv("REGISTRIES_CONFIG_PATH")
- }
- }()
- os.Setenv("REGISTRIES_CONFIG_PATH", registriesConf.Name())
+ sc := GetSystemContext("", "", false)
+
+ aliasesConf, err := ioutil.TempFile("", "short-name-aliases.conf")
+ require.NoError(t, err)
+ defer aliasesConf.Close()
+ defer os.Remove(aliasesConf.Name())
+ sc.UserShortNameAliasConfPath = aliasesConf.Name()
+ sc.SystemRegistriesConfPath = registriesConf.Name()
for _, c := range []struct {
- input string
- expected []pullRefStrings
- expectedUsedSearchRegistries bool
+ input string
+ expected []pullRefStrings
}{
- {"#", nil, false}, // Clearly invalid.
+ {"#", nil}, // Clearly invalid.
{ // Fully-explicit docker.io, name-only.
"docker.io/library/busybox",
// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
- []pullRefStrings{{"docker.io/library/busybox", "docker://busybox:latest", "docker.io/library/busybox:latest"}},
- false,
+ []pullRefStrings{{"docker.io/library/busybox:latest", "docker://busybox:latest", "docker.io/library/busybox:latest"}},
},
{ // docker.io with implied /library/, name-only.
"docker.io/busybox",
// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
- []pullRefStrings{{"docker.io/busybox", "docker://busybox:latest", "docker.io/library/busybox:latest"}},
- false,
+ []pullRefStrings{{"docker.io/library/busybox:latest", "docker://busybox:latest", "docker.io/library/busybox:latest"}},
},
{ // Qualified example.com, name-only.
"example.com/ns/busybox",
- []pullRefStrings{{"example.com/ns/busybox", "docker://example.com/ns/busybox:latest", "example.com/ns/busybox:latest"}},
- false,
+ []pullRefStrings{{"example.com/ns/busybox:latest", "docker://example.com/ns/busybox:latest", "example.com/ns/busybox:latest"}},
},
{ // Qualified example.com, name:tag.
"example.com/ns/busybox:notlatest",
[]pullRefStrings{{"example.com/ns/busybox:notlatest", "docker://example.com/ns/busybox:notlatest", "example.com/ns/busybox:notlatest"}},
- false,
},
{ // Qualified example.com, name@digest.
"example.com/ns/busybox" + digestSuffix,
[]pullRefStrings{{"example.com/ns/busybox" + digestSuffix, "docker://example.com/ns/busybox" + digestSuffix,
"example.com/ns/busybox" + digestSuffix}},
- false,
},
// Qualified example.com, name:tag@digest. This code is happy to try, but .srcRef parsing currently rejects such input.
- {"example.com/ns/busybox:notlatest" + digestSuffix, nil, false},
+ {"example.com/ns/busybox:notlatest" + digestSuffix, nil},
{ // Unqualified, single-name, name-only
"busybox",
[]pullRefStrings{
- {"example.com/busybox", "docker://example.com/busybox:latest", "example.com/busybox:latest"},
+ {"example.com/busybox:latest", "docker://example.com/busybox:latest", "example.com/busybox:latest"},
// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
- {"docker.io/library/busybox", "docker://busybox:latest", "docker.io/library/busybox:latest"},
+ {"docker.io/library/busybox:latest", "docker://busybox:latest", "docker.io/library/busybox:latest"},
},
- true,
},
{ // Unqualified, namespaced, name-only
"ns/busybox",
[]pullRefStrings{
- {"example.com/ns/busybox", "docker://example.com/ns/busybox:latest", "example.com/ns/busybox:latest"},
+ {"example.com/ns/busybox:latest", "docker://example.com/ns/busybox:latest", "example.com/ns/busybox:latest"},
},
- true,
},
{ // Unqualified, name:tag
"busybox:notlatest",
@@ -374,7 +359,6 @@ func TestPullGoalFromPossiblyUnqualifiedName(t *testing.T) {
// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
{"docker.io/library/busybox:notlatest", "docker://busybox:notlatest", "docker.io/library/busybox:notlatest"},
},
- true,
},
{ // Unqualified, name@digest
"busybox" + digestSuffix,
@@ -383,29 +367,22 @@ func TestPullGoalFromPossiblyUnqualifiedName(t *testing.T) {
// (The docker:// representation is shortened by c/image/docker.Reference but it refers to "docker.io/library".)
{"docker.io/library/busybox" + digestSuffix, "docker://busybox" + digestSuffix, "docker.io/library/busybox" + digestSuffix},
},
- true,
},
// Unqualified, name:tag@digest. This code is happy to try, but .srcRef parsing currently rejects such input.
- {"busybox:notlatest" + digestSuffix, nil, false},
+ {"busybox:notlatest" + digestSuffix, nil},
} {
- res, err := ir.pullGoalFromPossiblyUnqualifiedName(c.input)
+ res, err := ir.pullGoalFromPossiblyUnqualifiedName(sc, nil, c.input)
if len(c.expected) == 0 {
assert.Error(t, err, c.input)
} else {
assert.NoError(t, err, c.input)
for i, e := range c.expected {
- testDescription := fmt.Sprintf("%s #%d", c.input, i)
+ testDescription := fmt.Sprintf("%s #%d (%v)", c.input, i, res.refPairs)
assert.Equal(t, e.image, res.refPairs[i].image, testDescription)
assert.Equal(t, e.srcRef, transports.ImageName(res.refPairs[i].srcRef), testDescription)
assert.Equal(t, e.dstName, storageReferenceWithoutLocation(res.refPairs[i].dstRef), testDescription)
}
assert.False(t, res.pullAllPairs, c.input)
- assert.Equal(t, c.expectedUsedSearchRegistries, res.usedSearchRegistries, c.input)
- if !c.expectedUsedSearchRegistries {
- assert.Nil(t, res.searchedRegistries, c.input)
- } else {
- assert.Equal(t, []string{"example.com", "docker.io"}, res.searchedRegistries, c.input)
- }
}
}
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-17 20:45:05 +0000