func (sys *IAMSys) GetRolePolicy(arnStr string) (arn.ARN, string, error) {
	roleArn, err := arn.Parse(arnStr)
	if err != nil {
		return arn.ARN{}, "", fmt.Errorf("RoleARN parse err: %v", err)
	}
	rolePolicy, ok := sys.rolesMap[roleArn]
	if !ok {
		return arn.ARN{}, "", fmt.Errorf("RoleARN %s is not defined.", arnStr)
	}
	return roleArn, rolePolicy, nil
}

		}
		s3WebIdentityIAM := credentials.IAM{
			Client: &http.Client{
				Transport: NewHTTPTransport(),
			},
			EKSIdentity: struct {
				TokenFile       string
				RoleARN         string
				RoleSessionName string
			}{
				conf.AWSRoleWebIdentityTokenFile,
				conf.AWSRoleARN,
				sessionName,
			},
		}
		creds = credentials.New(&s3WebIdentityIAM)