Ansible Playbook語法問題

Question

我遇到了用於設置我的AWS VPC的安全劇本的問題。

這裏是陽明的文件，它導致了問題

Outputs: 
    TemplateID: 
    Description: cloudonaut.io template id 
    Value: vpc/vpc-2azs 
    StackName: 
    Description: Stack name 
    Value: !Sub '${AWS::StackName}' 

最後一行是被提出的語法錯誤的片段。錯誤是

[WARNING]: Host file not found: /etc/ansible/hosts 

[WARNING]: provided hosts list is empty, only localhost is available 

ERROR! Syntax Error while loading YAML. 


The error appears to have been in '/vagrant/Devel/chalktalk-config/chalktalk-config/cloudformation/vpc2az.yaml': line 233, column 13, but may 
be elsewhere in the file depending on the exact syntax problem. 

The offending line appears to be: 

    Description: Stack name 
    Value: !Sub '${AWS::StackName}' 
      ^here 

Answer 1

您正在運行到YAML標記語法。有關更多信息，請參見What does a single exclamation mark do in YAML?。

快速的答案是用雙引號將Value變量包裝起來。

Value: "!Sub '${AWS::StackName}'"