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registries.go
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/
registries.go
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/*
Copyright 2019 The KubeSphere Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package registries
import (
"context"
"encoding/base64"
"encoding/json"
"fmt"
"strings"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
"github.com/emicklei/go-restful/v3"
corev1 "k8s.io/api/core/v1"
"k8s.io/client-go/informers"
"k8s.io/klog/v2"
"kubesphere.io/kubesphere/pkg/api"
)
const (
loginSuccess = "Login Succeeded"
StatusFailed = "failed"
StatusSuccess = "succeeded"
)
type DockerConfigJson struct {
Auths DockerConfigMap `json:"auths"`
}
// DockerConfig represents the config file used by the docker CLI.
// This config that represents the credentials that should be used
// when pulling images from specific image repositories.
type DockerConfigMap map[string]DockerConfigEntry
type DockerConfigEntry struct {
Username string `json:"username"`
Password string `json:"password"`
Email string `json:"email"`
ServerAddress string `json:"serverAddress,omitempty"`
}
type RegistryGetter interface {
VerifyRegistryCredential(credential api.RegistryCredential) error
GetEntry(namespace, secretName, imageName string, insecure bool) (ImageDetails, error)
}
type registryGetter struct {
informers informers.SharedInformerFactory
}
func NewRegistryGetter(informers informers.SharedInformerFactory) RegistryGetter {
return ®istryGetter{informers: informers}
}
func (c *registryGetter) VerifyRegistryCredential(credential api.RegistryCredential) error {
auth := base64.StdEncoding.EncodeToString([]byte(credential.Username + ":" + credential.Password))
ctx := context.Background()
cli, err := client.NewClientWithOpts(client.WithAPIVersionNegotiation())
if err != nil {
klog.Error(err)
}
config := types.AuthConfig{
Username: credential.Username,
Password: credential.Password,
Auth: auth,
ServerAddress: credential.ServerHost,
}
resp, err := cli.RegistryLogin(ctx, config)
cli.Close()
if err != nil {
return err
}
if resp.Status == loginSuccess {
return nil
} else {
return fmt.Errorf(resp.Status)
}
}
func (c *registryGetter) GetEntry(namespace, secretName, imageName string, insecure bool) (ImageDetails, error) {
imageDetails, err := c.getEntryBySecret(namespace, secretName, imageName, insecure)
if imageDetails.Status == StatusFailed {
imageDetails.Message = err.Error()
}
return imageDetails, err
}
func (c *registryGetter) getEntryBySecret(namespace, secretName, imageName string, insecure bool) (ImageDetails, error) {
failedImageDetails := ImageDetails{
Status: StatusFailed,
Message: "",
}
var config *DockerConfigEntry
if namespace == "" || secretName == "" {
config = &DockerConfigEntry{}
} else {
secret, err := c.informers.Core().V1().Secrets().Lister().Secrets(namespace).Get(secretName)
if err != nil {
return failedImageDetails, err
}
config, err = getDockerEntryFromDockerSecret(secret)
if err != nil {
return failedImageDetails, err
}
}
// default use ssl
checkSSl := func(serverAddress string) bool {
if strings.HasPrefix(serverAddress, "http://") {
return false
} else {
return true
}
}
if strings.HasPrefix(imageName, "http") {
dockerurl, err := ParseDockerURL(imageName)
if err != nil {
return failedImageDetails, err
}
imageName = dockerurl.StringWithoutScheme()
}
// parse image
image, err := ParseImage(imageName)
if err != nil {
return failedImageDetails, err
}
useSSL := checkSSl(config.ServerAddress)
// Create the registry client.
r, err := CreateRegistryClient(config.Username, config.Password, image.Domain, useSSL, insecure)
if err != nil {
return failedImageDetails, err
}
digestUrl := r.GetDigestUrl(image)
// Get token.
token, err := r.Token(digestUrl)
if err != nil {
return failedImageDetails, err
}
// Get digest.
imageManifest, err := r.ImageManifest(image, token)
if err != nil {
if serviceError, ok := err.(restful.ServiceError); ok {
return failedImageDetails, serviceError
}
return failedImageDetails, err
}
image.Digest = imageManifest.ManifestConfig.Digest
// Get blob.
imageBlob, err := r.ImageBlob(image, token)
if err != nil {
return failedImageDetails, err
}
return ImageDetails{
Status: StatusSuccess,
ImageManifest: imageManifest,
ImageBlob: imageBlob,
ImageTag: image.Tag,
Registry: image.Domain,
}, nil
}
func getDockerEntryFromDockerSecret(instance *corev1.Secret) (dockerConfigEntry *DockerConfigEntry, err error) {
if instance.Type != corev1.SecretTypeDockerConfigJson {
return nil, fmt.Errorf("secret %s in ns %s type should be %s",
instance.Name, instance.Namespace, corev1.SecretTypeDockerConfigJson)
}
dockerConfigBytes, ok := instance.Data[corev1.DockerConfigJsonKey]
if !ok {
return nil, fmt.Errorf("could not get data %s", corev1.DockerConfigJsonKey)
}
dockerConfig := &DockerConfigJson{}
err = json.Unmarshal(dockerConfigBytes, dockerConfig)
if err != nil {
return nil, err
}
if len(dockerConfig.Auths) == 0 {
return nil, fmt.Errorf("docker config auth len should not be 0")
}
for registryAddress, dce := range dockerConfig.Auths {
dce.ServerAddress = registryAddress
return &dce, nil
}
return nil, nil
}