amazon-web-services - AWS CloudFormation YAML !或函数

Question

错误:“模板验证错误:模板格式错误:条件只能是对参数和其他条件的 bool 运算”

工作 JSON 条件 block :

"Conditions" : {
    "CreateBetaResources" : {"Fn::Or" : [ {"Fn::Equals" : [{"Ref" : "Environment"}, "beta"]}, {"Fn::Equals" : [{"Ref" : "Environment"}, "eubeta"]} ]},
    "CreateStagingResources" : {"Fn::Equals" : [{"Ref" : "Environment"}, "staging"]},
    "CreateProdResources" : { "Fn::Or": [ {"Fn::Equals" : [{"Ref" : "Environment"}, "prod"]}, {"Fn::Equals" : [{"Ref" : "Environment"}, "euprod"]} ] }
  },

YAML block 不起作用:

Conditions:
  CreateBetaResources:
    !Or [!Equals [!Ref "Environment", beta], !Equals [!Ref "Environment", eubeta]]
  CreateStagingResources:
    - !Equals [!Ref "Environment", staging]
  CreateProdResources:
    !Or [!Equals [!Ref "Environment", prod], !Equals [!Ref "Environment", euprod]]

为什么会出现这个错误？我已经搜索了有关“Fn::Or”和条件的文档...语法似乎是正确的。我还尝试了很多很多其他格式，但这是最接近文档示例的一种。

Answer 1

使用 YAML 在条件 block 内实例化 !Or/!Equals 的正确方法如下:

Conditions:
 CreateBetaResources: !Or [!Equals [!Ref "Environment", beta], !Equals [!Ref "Environment", eubeta]]
 CreateStagingResources: !Equals [!Ref "Environment", staging]
 CreateProdResources: !Or [!Equals [!Ref "Environment", prod], !Equals [!Ref "Environment", euprod]]

在调用 !Equals 函数 (-) 之前不要包含列表标识符。