Changed Credential Helper to a predefined type ECRCredentialHelper and associated changes for the same

cluster/validation.go

@@ -54,11 +54,6 @@ func (c *Cluster) ValidateCluster(ctx context.Context) error {
 		return err
 	}
 
-	// validate registry credential plugin
-	if err := validateRegistryAuthPlugin(c); err != nil {
-		return err
-	}
-
 	// validate services options
 	return validateServicesOptions(c)
 }
@@ -654,19 +649,3 @@ func validateCRIDockerdOption(c *Cluster) error {
 	}
 	return nil
 }
-
-func validateRegistryAuthPlugin(c *Cluster) error {
-	for _, pr := range c.PrivateRegistriesMap {
-		if len(pr.CredentialPlugin) != 0 {
-			if credPluginType, ok := pr.CredentialPlugin["type"]; ok {
-				switch credPluginType {
-				case "ecr":
-					logrus.Debugf("Plugin type %s is valid", credPluginType)
-				default:
-					return fmt.Errorf("invalid registry plugin helper provided for %s", pr.URL)
-				}
-			}
-		}
-	}
-	return nil
-}

docker/docker.go

@@ -672,18 +672,10 @@ func tryRegistryAuth(pr v3.PrivateRegistry) types.RequestPrivilegeFunc {
 func getRegistryAuth(pr v3.PrivateRegistry) (string, error) {
 	var authConfig types.AuthConfig
 	var err error
-	if len(pr.User) == 0 && len(pr.Password) == 0 && len(pr.CredentialPlugin) != 0 {
-		if regType, ok := pr.CredentialPlugin["type"]; ok {
-			switch regType {
-			case "ecr":
-				// generate ecr authConfig
-				authConfig, err = util.ECRCredentialPlugin(pr.CredentialPlugin, pr.URL)
-				if err != nil {
-					return "", err
-				}
-			default:
-				return "", fmt.Errorf("Unsupported Credential Plugin")
-			}
+	if len(pr.User) == 0 && len(pr.Password) == 0 && pr.ECRCredentialPlugin != nil {
+		authConfig, err = util.ECRCredentialPlugin(pr.ECRCredentialPlugin, pr.URL)
+		if err != nil {
+			return "", err
 		}
 	} else {
 		authConfig = types.AuthConfig{
@@ -761,12 +753,8 @@ func GetKubeletDockerConfig(prsMap map[string]v3.PrivateRegistry) (string, error
 	auths := map[string]authConfig{}
 	credHelper := make(map[string]string)
 	for url, pr := range prsMap {
-		if len(pr.CredentialPlugin) != 0 {
-			if credPluginType, ok := pr.CredentialPlugin["type"]; ok {
-				if credPluginType == "ecr" {
-					credHelper[pr.URL] = "ecr-login"
-				}
-			}
+		if pr.ECRCredentialPlugin != nil {
+			credHelper[pr.URL] = "ecr-login"
 		} else {
 			auth := base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", pr.User, pr.Password)))
 			auths[url] = authConfig{Auth: auth}

types/rke_types.go

@@ -110,8 +110,8 @@ type PrivateRegistry struct {
 	Password string `yaml:"password" json:"password,omitempty" norman:"type=password"`
 	// Default registry
 	IsDefault bool `yaml:"is_default" json:"isDefault,omitempty"`
-	// CredentialPlugin
-	CredentialPlugin map[string]string `yaml:"credentialPlugin" json:"credentialPlugin,omitempty"`
+	// ECRCredentialPlugin
+	ECRCredentialPlugin *ECRCredentialPlugin `yaml:"ecr_credential_plugin" json:"ecrCredentialPlugin,omitempty"`
 }
 
 type RKESystemImages struct {
@@ -1011,3 +1011,9 @@ type NodeDrainInput struct {
 	// Time to wait (in seconds) before giving up for one try
 	Timeout int `yaml:"timeout" json:"timeout" norman:"min=1,max=10800,default=120"`
 }
+
+type ECRCredentialPlugin struct {
+	AwsAccessKeyID     string `yaml:"aws_access_key_id" json:"awsAccessKeyId,omitempty"`
+	AwsSecretAccessKey string `yaml:"aws_secret_access_key" json:"awsSecretAccessKey,omitempty"`
+	AwsSessionToken    string `yaml:"aws_session_token" json:"awsAccessToken,omitempty"`
+}

util/ecr.go

@@ -6,11 +6,14 @@ import (
 	"regexp"
 	"strings"
 
+	"github.com/sirupsen/logrus"
+
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/credentials"
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/ecr"
 	"github.com/docker/docker/api/types"
+	v3 "github.com/rancher/rke/types"
 )
 
 const proxyEndpointScheme = "https://"
@@ -18,7 +21,13 @@ const proxyEndpointScheme = "https://"
 var ecrPattern = regexp.MustCompile(`(^[a-zA-Z0-9][a-zA-Z0-9-_]*)\.dkr\.ecr(\-fips)?\.([a-zA-Z0-9][a-zA-Z0-9-_]*)\.amazonaws\.com(\.cn)?`)
 
 // ECRCredentialPlugin is a wrapper to generate ECR token using the AWS Credentials
-func ECRCredentialPlugin(plugin map[string]string, pr string) (authConfig types.AuthConfig, err error) {
+func ECRCredentialPlugin(plugin *v3.ECRCredentialPlugin, pr string) (authConfig types.AuthConfig, err error) {
+	if plugin == nil {
+		err = fmt.Errorf("ECRCredentialPlugin: ECRCredentialPlugin called with nil plugin data")
+		return authConfig, err
+	}
+
+	logrus.Tracef("ECRCredentialPlugin: ECRCredentialPlugin called with plugin [%v] and pr [%s]", plugin, pr)
 
 	if strings.HasPrefix(pr, proxyEndpointScheme) {
 		pr = strings.TrimPrefix(pr, proxyEndpointScheme)
@@ -34,17 +43,16 @@ func ECRCredentialPlugin(plugin map[string]string, pr string) (authConfig types.
 		Region: aws.String(matches[3]),
 	}
 
+	logrus.Debugf("ECRCredentialPlugin: Setting Region to [%s]", matches[3])
 	var sess *session.Session
-	awsAccessKeyID, accessKeyOK := plugin["aws_access_key_id"]
-	awsSecretAccessKey, secretKeyOK := plugin["aws_secret_access_key"]
 
 	// Use predefined keys and override env lookup if keys are present //
-	if accessKeyOK && secretKeyOK {
-		// if session token doesnt exist just pass empty string
-		awsSessionToken := plugin["aws_session_token"]
-		config.Credentials = credentials.NewStaticCredentials(awsAccessKeyID, awsSecretAccessKey, awsSessionToken)
+	if plugin.AwsAccessKeyID != "" && plugin.AwsSecretAccessKey != "" {
+		// if session token doesn't exist just pass empty string
+		config.Credentials = credentials.NewStaticCredentials(plugin.AwsAccessKeyID, plugin.AwsSecretAccessKey, plugin.AwsSessionToken)
 		sess, err = session.NewSession(config)
 	} else {
+		logrus.Debug("ECRCredentialPlugin: aws_access_key_id and aws_secret_access_key keys not in plugin, using IAM role or env variables")
 		sess, err = session.NewSessionWithOptions(session.Options{
 			Config:            *config,
 			SharedConfigState: session.SharedConfigEnable,
@@ -52,6 +60,7 @@ func ECRCredentialPlugin(plugin map[string]string, pr string) (authConfig types.
 	}
 
 	if err != nil {
+		logrus.Trace("ECRCredentialPlugin: Error found while constructing auth session, returning authConfig")
 		return authConfig, err
 	}