Cloud-Custodian resource:ec2 发送邮件区域和帐户名变量问题

Cloud-Custodian resource:ec2 send mail region and account-name variable problem

我准备了一个 Cloud-CustodianPolicy,它可以检测新创建的 EC2 并发送电子邮件。该结构有效,但我无法将帐户名和地区信息写入邮件主题或正文。虽然yaml在role部分可以理解为{account_id},但是在mail相关部分里面是无法理解的。有没有办法在策略中使用这些参数变量?

yaml 文件;

 ...
  role: arn:aws:iam::{account_id}:role/administrator", 
 ...

  actions:
      - type: notify
        template: default
        priority_header: '2'
        subject: "Huge Sized Type EC2 has been PoweredON accountID:{account_id} {account_name}-{region}"

发送邮件中的邮件主题;

subject: Huge Sized Type EC2 has been PoweredON accountID:{account_id} {account_name}-{region}

我通过添加双花括号解决了问题并使用了 account。下面的格式在我的 subject.

配置中有效
subject: Huge Sized Type EC2 has been PoweredON in {{account}} on {{region}}