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Helm 3: fix "latest" tag bug (#5279)

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* add extra ref parsing, validation

Signed-off-by: Josh Dolitsky <jdolitsky@gmail.com>

* add fix for missing locator

Signed-off-by: Josh Dolitsky <jdolitsky@gmail.com>

* add repo and tag fields for clarity

Signed-off-by: Josh Dolitsky <jdolitsky@gmail.com>

* small refector

Signed-off-by: Josh Dolitsky <jdolitsky@gmail.com>
This commit is contained in:
Josh Dolitsky 2019-02-08 14:17:42 -06:00 committed by GitHub
parent 122ae70dc5
commit 16b59bfe5b
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
4 changed files with 160 additions and 31 deletions
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14
pkg/registry/cache.go
View file

@ -137,7 +137,7 @@ func (cache *filesystemCache) ChartToLayers(ch *chart.Chart) ([]ocispec.Descript
}
func (cache *filesystemCache) LoadReference(ref *Reference) ([]ocispec.Descriptor, error) {
tagDir := filepath.Join(cache.rootDir, "refs", escape(ref.Locator), "tags", tagOrDefault(ref.Object))
tagDir := filepath.Join(cache.rootDir, "refs", escape(ref.Repo), "tags", tagOrDefault(ref.Tag))
// add meta layer
metaJSONRaw, err := getSymlinkDestContent(filepath.Join(tagDir, "meta"))
@ -165,8 +165,8 @@ func (cache *filesystemCache) LoadReference(ref *Reference) ([]ocispec.Descripto
}
func (cache *filesystemCache) StoreReference(ref *Reference, layers []ocispec.Descriptor) (bool, error) {
tag := tagOrDefault(ref.Object)
tagDir := mkdir(filepath.Join(cache.rootDir, "refs", escape(ref.Locator), "tags", tag))
tag := tagOrDefault(ref.Tag)
tagDir := mkdir(filepath.Join(cache.rootDir, "refs", escape(ref.Repo), "tags", tag))
// Retrieve just the meta and content layers
metaLayer, contentLayer, err := extractLayers(layers)
@ -239,7 +239,7 @@ func (cache *filesystemCache) StoreReference(ref *Reference, layers []ocispec.De
}
func (cache *filesystemCache) DeleteReference(ref *Reference) error {
tagDir := filepath.Join(cache.rootDir, "refs", escape(ref.Locator), "tags", tagOrDefault(ref.Object))
tagDir := filepath.Join(cache.rootDir, "refs", escape(ref.Repo), "tags", tagOrDefault(ref.Tag))
if _, err := os.Stat(tagDir); os.IsNotExist(err) {
return errors.New("ref not found")
}
@ -427,10 +427,10 @@ func getRefsSorted(refsRootDir string) ([][]interface{}, error) {
tagDir := filepath.Dir(path)
// Determine the ref
locator := unescape(strings.TrimLeft(
repo := unescape(strings.TrimLeft(
strings.TrimPrefix(filepath.Dir(filepath.Dir(tagDir)), refsRootDir), "/\\"))
object := filepath.Base(tagDir)
ref := fmt.Sprintf("%s:%s", locator, object)
tag := filepath.Base(tagDir)
ref := fmt.Sprintf("%s:%s", repo, tag)
// Init hashmap entry if does not exist
if _, ok := refsMap[ref]; !ok {

18
pkg/registry/client.go
View file

@ -60,7 +60,7 @@ func NewClient(options *ClientOptions) *Client {
// PushChart uploads a chart to a registry
func (c *Client) PushChart(ref *Reference) error {
c.setDefaultTag(ref)
fmt.Fprintf(c.out, "The push refers to repository [%s]\n", ref.Locator)
fmt.Fprintf(c.out, "The push refers to repository [%s]\n", ref.Repo)
layers, err := c.cache.LoadReference(ref)
if err != nil {
return err
@ -74,14 +74,14 @@ func (c *Client) PushChart(ref *Reference) error {
totalSize += layer.Size
}
fmt.Fprintf(c.out,
"%s: pushed to remote (%d layers, %s total)\n", ref.Object, len(layers), byteCountBinary(totalSize))
"%s: pushed to remote (%d layers, %s total)\n", ref.Tag, len(layers), byteCountBinary(totalSize))
return nil
}
// PullChart downloads a chart from a registry
func (c *Client) PullChart(ref *Reference) error {
c.setDefaultTag(ref)
fmt.Fprintf(c.out, "%s: Pulling from %s\n", ref.Object, ref.Locator)
fmt.Fprintf(c.out, "%s: Pulling from %s\n", ref.Tag, ref.Repo)
layers, err := oras.Pull(context.Background(), c.resolver, ref.String(), c.cache.store, KnownMediaTypes()...)
if err != nil {
return err
@ -91,9 +91,9 @@ func (c *Client) PullChart(ref *Reference) error {
return err
}
if !exists {
fmt.Fprintf(c.out, "Status: Downloaded newer chart for %s:%s\n", ref.Locator, ref.Object)
fmt.Fprintf(c.out, "Status: Downloaded newer chart for %s:%s\n", ref.Repo, ref.Tag)
} else {
fmt.Fprintf(c.out, "Status: Chart is up to date for %s:%s\n", ref.Locator, ref.Object)
fmt.Fprintf(c.out, "Status: Chart is up to date for %s:%s\n", ref.Repo, ref.Tag)
}
return nil
}
@ -109,7 +109,7 @@ func (c *Client) SaveChart(ch *chart.Chart, ref *Reference) error {
if err != nil {
return err
}
fmt.Fprintf(c.out, "%s: saved\n", ref.Object)
fmt.Fprintf(c.out, "%s: saved\n", ref.Tag)
return nil
}
@ -131,7 +131,7 @@ func (c *Client) RemoveChart(ref *Reference) error {
if err != nil {
return err
}
fmt.Fprintf(c.out, "%s: removed\n", ref.Object)
fmt.Fprintf(c.out, "%s: removed\n", ref.Tag)
return err
}
@ -152,8 +152,8 @@ func (c *Client) PrintChartTable() error {
}
func (c *Client) setDefaultTag(ref *Reference) {
if ref.Object == "" {
ref.Object = HelmChartDefaultTag
if ref.Tag == "" {
ref.Tag = HelmChartDefaultTag
fmt.Fprintf(c.out, "Using default tag: %s\n", HelmChartDefaultTag)
}
}

97
pkg/registry/reference.go
View file

@ -17,15 +17,25 @@ limitations under the License.
package registry // import "k8s.io/helm/pkg/registry"
import (
"errors"
"regexp"
"strings"
"github.com/containerd/containerd/reference"
)
var (
validPortRegEx = regexp.MustCompile("^([1-9]\\d{0,3}|0|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])$") // adapted from https://stackoverflow.com/a/12968117
emptyRepoError = errors.New("parsed repo was empty")
tooManyColonsError = errors.New("ref may only contain a single colon character (:) unless specifying a port number")
)
type (
// Reference defines the main components of a reference specification
Reference struct {
*reference.Spec
Tag string
Repo string
}
)
@ -35,11 +45,90 @@ func ParseReference(s string) (*Reference, error) {
if err != nil {
return nil, err
}
ref := Reference{&spec}
// convert to our custom type and make necessary mods
ref := Reference{Spec: &spec}
ref.setExtraFields()
// ensure the reference is valid
err = ref.validate()
if err != nil {
return nil, err
}
return &ref, nil
}
// Repo returns a reference's repo minus the hostname
func (ref *Reference) Repo() string {
return strings.TrimPrefix(strings.TrimPrefix(ref.Locator, ref.Hostname()), "/")
// setExtraFields adds the Repo and Tag fields to a Reference
func (ref *Reference) setExtraFields() {
ref.Tag = ref.Object
ref.Repo = ref.Locator
ref.fixNoTag()
ref.fixNoRepo()
}
// fixNoTag is a fix for ref strings such as "mychart:1.0.0", which result in missing tag
func (ref *Reference) fixNoTag() {
if ref.Tag == "" {
parts := strings.Split(ref.Repo, ":")
numParts := len(parts)
if 0 < numParts {
lastIndex := numParts - 1
lastPart := parts[lastIndex]
if !strings.Contains(lastPart, "/") {
ref.Repo = strings.Join(parts[:lastIndex], ":")
ref.Tag = lastPart
}
}
}
}
// fixNoRepo is a fix for ref strings such as "mychart", which have the repo swapped with tag
func (ref *Reference) fixNoRepo() {
if ref.Repo == "" {
ref.Repo = ref.Tag
ref.Tag = ""
}
}
// validate makes sure the ref meets our criteria
func (ref *Reference) validate() error {
err := ref.validateRepo()
if err != nil {
return err
}
return ref.validateNumColons()
}
// validateRepo checks that the Repo field is non-empty
func (ref *Reference) validateRepo() error {
if ref.Repo == "" {
return emptyRepoError
}
return nil
}
// validateNumColon ensures the ref only contains a single colon character (:)
// (or potentially two, there might be a port number specified i.e. :5000)
func (ref *Reference) validateNumColons() error {
if strings.Contains(ref.Tag, ":") {
return tooManyColonsError
}
parts := strings.Split(ref.Repo, ":")
lastIndex := len(parts) - 1
if 1 < lastIndex {
return tooManyColonsError
}
if 0 < lastIndex {
port := strings.Split(parts[lastIndex], "/")[0]
if !isValidPort(port) {
return tooManyColonsError
}
}
return nil
}
// isValidPort returns whether or not a string looks like a valid port
func isValidPort(s string) bool {
return validPortRegEx.MatchString(s)
}

62
pkg/registry/reference_test.go
View file

@ -25,25 +25,65 @@ import (
func TestReference(t *testing.T) {
is := assert.New(t)
// bad ref
// bad refs
s := ""
_, err := ParseReference(s)
is.Error(err)
is.Error(err, "empty ref")
s = "my:bad:ref"
_, err = ParseReference(s)
is.Error(err, "ref contains too many colons (2)")
s = "my:really:bad:ref"
_, err = ParseReference(s)
is.Error(err, "ref contains too many colons (3)")
// good refs
s = "localhost:5000/mychart:latest"
s = "mychart"
ref, err := ParseReference(s)
is.NoError(err)
is.Equal("localhost:5000", ref.Hostname())
is.Equal("mychart", ref.Repo())
is.Equal("localhost:5000/mychart", ref.Locator)
is.Equal("latest", ref.Object)
is.Equal("mychart", ref.Repo)
is.Equal("", ref.Tag)
s = "mychart:1.5.0"
ref, err = ParseReference(s)
is.NoError(err)
is.Equal("mychart", ref.Repo)
is.Equal("1.5.0", ref.Tag)
s = "myrepo/mychart"
ref, err = ParseReference(s)
is.NoError(err)
is.Equal("myrepo/mychart", ref.Repo)
is.Equal("", ref.Tag)
s = "myrepo/mychart:1.5.0"
ref, err = ParseReference(s)
is.NoError(err)
is.Equal("myrepo/mychart", ref.Repo)
is.Equal("1.5.0", ref.Tag)
s = "mychart:5001:1.5.0"
ref, err = ParseReference(s)
is.NoError(err)
is.Equal("mychart:5001", ref.Repo)
is.Equal("1.5.0", ref.Tag)
s = "myrepo:5001/mychart:1.5.0"
ref, err = ParseReference(s)
is.NoError(err)
is.Equal("myrepo:5001/mychart", ref.Repo)
is.Equal("1.5.0", ref.Tag)
s = "localhost:5000/mychart:latest"
ref, err = ParseReference(s)
is.NoError(err)
is.Equal("localhost:5000/mychart", ref.Repo)
is.Equal("latest", ref.Tag)
s = "my.host.com/my/nested/repo:1.2.3"
ref, err = ParseReference(s)
is.NoError(err)
is.Equal("my.host.com", ref.Hostname())
is.Equal("my/nested/repo", ref.Repo())
is.Equal("my.host.com/my/nested/repo", ref.Locator)
is.Equal("1.2.3", ref.Object)
is.Equal("my.host.com/my/nested/repo", ref.Repo)
is.Equal("1.2.3", ref.Tag)
}