AWS:云形成:是否可以使用多个"DependsOn"？

Question

鉴于我有这个示例模板:

{
    "AWSTemplateFormatVersion" : "2010-09-09",
    "Mappings" : {
        "RegionMap" : {
            "us-west-1" : { "AMI" : "ami-655a0a20" },
            ...
        }
    },
    "Resources" : {
        "Ec2Instance" : {
            "Type" : "AWS::EC2::Instance",
            "Properties" : {
                ...
            },
            "DependsOn" : "myDB"
        },
        "myDB" : {
            "Type" : "AWS::RDS::DBInstance",
            "Properties" : {
               ...
            }
        },
        "myDB2" : {
            "Type" : "AWS::RDS::DBInstance",
            "Properties" : {
               ...
            }
        }
    }
}

是否可以以任何方式指定多个DependsOn？想要有一些想法会很棒:

"DependsOn" : ["myDB", "myDB2"]

什么是正常的方式？

Answer 1

是,

DependsOn属性可以采用单个字符串或字符串列表.

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-dependson.html

句法:

"DependsOn":[String,...]

Answer 2

这个答案首先出现在谷歌中，所以我将包括如何在 YAML 中执行多个依赖属性，我在这个答案中找到了。

AnotherProductionResource:
  Type: AWS::CloudFormation::Stack
   Condition: ISProduction
   DependsOn:
   - AResource
   - MyProductionResource
   Properties:
     [...]

Answer 3

是的，“DependsOn”可以接受多个字符串。我在下面列出了一个例子：

"DependsOn": [ "S3BucketAppElbLogs", "ElbLogAppBucketPolicy" ]