support to init client using ramrole

Signed-off-by: haoshuwei <haoshuwei24@gmail.com>

velero-plugin-for-alibabacloud/common.go

 package main
 
 import (
+	"encoding/json"
 	"fmt"
+	"github.com/aliyun/aliyun-oss-go-sdk/oss"
 	"github.com/joho/godotenv"
 	"github.com/pkg/errors"
 	"io/ioutil"
 	"net/http"
 	"os"
+	"time"
 )
 
 const (
@@ -24,6 +27,16 @@ const (
 	networkTypeInternal      = "internal"
 )
 
+// RoleAuth define STS Token Response
+type RoleAuth struct {
+	AccessKeyID     string
+	AccessKeySecret string
+	Expiration      time.Time
+	SecurityToken   string
+	LastUpdated     time.Time
+	Code            string
+}
+
 // load environment vars from $ALIBABA_CLOUD_CREDENTIALS_FILE, if it exists
 func loadEnv() error {
 	envFile := os.Getenv("ALIBABA_CLOUD_CREDENTIALS_FILE")
@@ -107,3 +120,62 @@ func getEcsRegionID(config map[string]string) string {
 		return value
 	}
 }
+
+// getRamRole return ramrole name
+func getRamRole () (string, error) {
+	subpath := "ram/security-credentials/"
+	roleName, err := GetMetaData(subpath)
+	if err != nil {
+		return "", err
+	}
+	return roleName, nil
+}
+
+//getSTSAK return AccessKeyID, AccessKeySecret and SecurityToken
+func getSTSAK(ramrole string) (string, string, string, error) {
+	// AliyunCSVeleroRole
+	roleAuth := RoleAuth{}
+	ramRoleURL := fmt.Sprintf("ram/security-credentials/%s", ramrole)
+	roleInfo, err := GetMetaData(ramRoleURL)
+	if err != nil {
+		return "", "", "", err
+	}
+
+	err = json.Unmarshal([]byte(roleInfo), &roleAuth)
+	if err != nil {
+		return "", "", "", err
+	}
+	return roleAuth.AccessKeyID, roleAuth.AccessKeySecret, roleAuth.SecurityToken, nil
+}
+
+//GetMetaData get metadata from ecs meta-server
+func GetMetaData(resource string) (string, error) {
+	resp, err := http.Get(metadataURL + resource)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+	return string(body), nil
+}
+
+func updateOssClient(ramRole string, endpoint string, client bucketGetter) (bucketGetter, error) {
+	bucketGetter := &ossBucketGetter{}
+	if len(ramRole) == 0 {
+		return client, nil
+	}
+	accessKeyID, accessKeySecret, stsToken, err := getSTSAK(ramRole)
+	if err != nil {
+		return nil, err
+	}
+	ossClient, err := oss.New(endpoint, accessKeyID, accessKeySecret, oss.SecurityToken(stsToken))
+	if err != nil {
+		return nil, err
+	}
+
+	bucketGetter.client = ossClient
+	return bucketGetter, err
+}

velero-plugin-for-alibabacloud/object_store.go

@@ -68,6 +68,8 @@ type ObjectStore struct {
 	client          bucketGetter
 	encryptionKeyID string
 	privateKey      []byte
+	ramRole         string
+	endpoint        string
 }
 
 // newObjectStore init ObjectStore
@@ -76,6 +78,11 @@ func newObjectStore(logger logrus.FieldLogger) *ObjectStore {
 }
 
 func (o *ObjectStore) getBucket(bucket string) (ossBucket, error) {
+	var err error
+	o.client, err = updateOssClient(o.ramRole, o. endpoint, o.client)
+	if err != nil {
+		o.log.Errorf("failed to update OSS Client: %v", err)
+	}
 	bucketObj, err := o.client.Bucket(bucket)
 	if err != nil {
 		o.log.Errorf("failed to get OSS bucket: %v", err)
@@ -89,15 +96,49 @@ func (o *ObjectStore) Init(config map[string]string) error {
 		return err
 	}
 
-	if err := loadEnv(); err != nil {
-		return err
+	accessKeyID := ""
+	accessKeySecret := ""
+	stsToken := ""
+	encryptionKeyID := ""
+
+	var client *oss.Client
+	var err error
+
+	endpoint := getOssEndpoint(config)
+	veleroForAck := os.Getenv("VELERO_FOR_ACK")
+	isHybrid := os.Getenv("IS_HYBRID")
+	if veleroForAck == "true" {
+		if isHybrid == "true" {
+			accessKeyID = os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_ID")
+			accessKeySecret = os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")
+			if len(accessKeyID) == 0 {
+				return errors.Errorf("IS_HYBRID set to true, but ALIBABA_CLOUD_ACCESS_KEY_ID environment variable is not set")
+			}
+			if len(accessKeySecret) == 0 {
+				return errors.Errorf("IS_HYBRID set to true, but ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variable is not set")
+			}
+		} else {
+			ramRole, err := getRamRole()
+			if err != nil {
+				return errors.Errorf("Failed to get ram role with err: %v", err)
 			}
+			o.ramRole = ramRole
 
-	accessKeyID := os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_ID")
-	accessKeySecret := os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")
-	stsToken := os.Getenv("ALIBABA_CLOUD_ACCESS_STS_TOKEN")
-	encryptionKeyID := os.Getenv("ALIBABA_CLOUD_ENCRYPTION_KEY_ID")
+			accessKeyID, accessKeySecret, stsToken, err = getSTSAK(ramRole)
+			if err != nil {
+				return errors.Errorf("Failed to get sts token from ram role %s with err: %v", ramRole, err)
+			}
+			client, err = oss.New(endpoint, accessKeyID, accessKeySecret, oss.SecurityToken(stsToken))
+		}
 
+	} else {
+		if err := loadEnv(); err != nil {
+			return err
+		}
+		accessKeyID = os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_ID")
+		accessKeySecret = os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")
+		stsToken = os.Getenv("ALIBABA_CLOUD_ACCESS_STS_TOKEN")
+		encryptionKeyID = os.Getenv("ALIBABA_CLOUD_ENCRYPTION_KEY_ID")
 		if len(accessKeyID) == 0 {
 			return errors.Errorf("ALIBABA_CLOUD_ACCESS_KEY_ID environment variable is not set")
 		}
@@ -106,15 +147,12 @@ func (o *ObjectStore) Init(config map[string]string) error {
 			return errors.Errorf("ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variable is not set")
 		}
 
-	endpoint := getOssEndpoint(config)
-	var client *oss.Client
-	var err error
-
 		if len(stsToken) == 0 {
 			client, err = oss.New(endpoint, accessKeyID, accessKeySecret)
 		} else {
 			client, err = oss.New(endpoint, accessKeyID, accessKeySecret, oss.SecurityToken(stsToken))
 		}
+	}
 
 	if err != nil {
 		return errors.Errorf("failed to create OSS client: %v", err.Error())
@@ -124,6 +162,7 @@ func (o *ObjectStore) Init(config map[string]string) error {
 		client,
 	}
 
+	o.endpoint = endpoint
 	o.encryptionKeyID = encryptionKeyID
 
 	return nil
@@ -140,7 +179,6 @@ func (o *ObjectStore) PutObject(bucket, key string, body io.Reader) error {
 			oss.ServerSideEncryption("KMS"),
 			oss.ServerSideEncryptionKeyID(o.encryptionKeyID))
 	} else {
-
 		err = bucketObj.PutObject(key, body)
 	}