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Use existing Docker credentials for pushing images (kyma-project#511)
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Suleyman Akbas
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Jul 21, 2020
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| package installation | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "context" | ||
| "encoding/base64" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "path" | ||
| "strings" | ||
| "time" | ||
|
|
||
| dockerConfig "github.com/docker/cli/cli/config" | ||
| configTypes "github.com/docker/cli/cli/config/types" | ||
| "github.com/docker/docker/api/types" | ||
| docker "github.com/docker/docker/client" | ||
| "github.com/docker/docker/pkg/archive" | ||
| "github.com/kyma-project/cli/internal/minikube" | ||
| ) | ||
|
|
||
| const ( | ||
| defaultRegistry = "index.docker.io" | ||
| ) | ||
|
|
||
| // DockerErrorMessage is used to parse error messages coming from Docker | ||
| type DockerErrorMessage struct { | ||
| Error string | ||
| } | ||
|
|
||
| func (i *Installation) buildKymaInstaller(imageName string) error { | ||
| var dc *docker.Client | ||
| var err error | ||
| if i.Options.IsLocal { | ||
| dc, err = minikube.DockerClient(i.Options.Verbose, i.Options.LocalCluster.Profile, i.Options.Timeout) | ||
| } else { | ||
| dc, err = docker.NewClientWithOpts(docker.FromEnv) | ||
| } | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| reader, err := archive.TarWithOptions(i.Options.LocalSrcPath, &archive.TarOptions{}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| ctx, cancel := context.WithTimeout(context.Background(), time.Duration(300)*time.Second) | ||
| defer cancel() | ||
|
|
||
| dc.NegotiateAPIVersion(ctx) | ||
|
|
||
| args := make(map[string]*string) | ||
| _, err = dc.ImageBuild( | ||
| ctx, | ||
| reader, | ||
| types.ImageBuildOptions{ | ||
| Tags: []string{strings.TrimSpace(string(imageName))}, | ||
| SuppressOutput: true, | ||
| Remove: true, | ||
| Dockerfile: path.Join("tools", "kyma-installer", "kyma.Dockerfile"), | ||
| BuildArgs: args, | ||
| }, | ||
| ) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (i *Installation) pushKymaInstaller() error { | ||
| ctx, cancel := context.WithTimeout(context.Background(), time.Duration(300)*time.Second) | ||
| defer cancel() | ||
|
|
||
| dc, err := docker.NewClientWithOpts(docker.FromEnv) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| dc.NegotiateAPIVersion(ctx) | ||
|
|
||
| domain, _ := splitDockerDomain(i.Options.CustomImage) | ||
| auth, err := resolve(domain) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| encodedJSON, err := json.Marshal(auth) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| authStr := base64.URLEncoding.EncodeToString(encodedJSON) | ||
|
|
||
| pusher, err := dc.ImagePush(ctx, i.Options.CustomImage, types.ImagePushOptions{RegistryAuth: authStr}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| defer pusher.Close() | ||
|
|
||
| var errorMessage DockerErrorMessage | ||
| buffIOReader := bufio.NewReader(pusher) | ||
|
|
||
| for { | ||
| streamBytes, err := buffIOReader.ReadBytes('\n') | ||
| if err == io.EOF { | ||
| break | ||
| } | ||
| err = json.Unmarshal(streamBytes, &errorMessage) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if errorMessage.Error != "" { | ||
| if strings.Contains(errorMessage.Error, "unauthorized") || strings.Contains(errorMessage.Error, "requested access to the resource is denied") { | ||
| return fmt.Errorf("failed to push Docker image: %s\nPlease run `docker login`", errorMessage.Error) | ||
| } | ||
| return fmt.Errorf("failed to push Docker image: %s", errorMessage.Error) | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func splitDockerDomain(name string) (domain, remainder string) { | ||
| i := strings.IndexRune(name, '/') | ||
| if i == -1 || (!strings.ContainsAny(name[:i], ".:") && name[:i] != "localhost") { | ||
| domain, remainder = defaultRegistry, name | ||
| } else { | ||
| domain, remainder = name[:i], name[i+1:] | ||
| } | ||
| return | ||
| } | ||
|
|
||
| // resolve finds the Docker credentials to push an image. | ||
| func resolve(registry string) (*configTypes.AuthConfig, error) { | ||
| cf, err := dockerConfig.Load(os.Getenv("DOCKER_CONFIG")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if registry == defaultRegistry { | ||
| registry = "https://" + defaultRegistry + "/v1/" | ||
| } | ||
|
|
||
| cfg, err := cf.GetAuthConfig(registry) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| empty := configTypes.AuthConfig{} | ||
| if cfg == empty { | ||
| return &empty, nil | ||
| } | ||
| return &configTypes.AuthConfig{ | ||
| Username: cfg.Username, | ||
| Password: cfg.Password, | ||
| Auth: cfg.Auth, | ||
| IdentityToken: cfg.IdentityToken, | ||
| RegistryToken: cfg.RegistryToken, | ||
| }, nil | ||
| } |
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