json - AWS : Cloud Formation: Is it possible to use multiple "DependsOn"?

Question

假设我有这个示例模板:

{
    "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？如果有这样的想法那就太好了:

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

正常的方法是什么？

Answer 1

是的，

The DependsOn attribute can take a single string or list of strings.

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

语法:

"DependsOn" : [ String, ... ]