AWS CloudFormation
User Guide (API Version 2010-05-15)
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Resources Declaration

In the Resources section you declare the AWS resources you want as part of your stack. Resources are separated by a comma.

Each resource must have a logical name unique within the template. This is the name you use elsewhere in the template as a dereference argument. Because constraints on the names of resources vary by service, all resource logical names must be alphanumeric [a-zA-Z0-9] only.

You must specify the type for each resource. Type names are fixed according to those listed in Resource Property Types Reference.

If a resource does not require any properties to be declared, you can omit the Properties section of that resource. For information about declaring a Property section, see Properties Declaration.

The following example shows a typical Resource declaration. It defines two resources. The MyInstance resource includes the MyQueue resource as part of its UserData property:

  "Resources" : {
    "MyInstance" : {
        "Type" : "AWS::EC2::Instance",
        "Properties" : {
            "UserData" : {
                "Fn::Base64" : {
                    "Fn::Join" : [ "", [ "Queue=", { "Ref" : "MyQueue" } ] ]
                 } },
            "AvailabilityZone" : "us-east-1a",
            "ImageId" : "ami-20b65349"
        }
    },

    "MyQueue" : {
        "Type" : "AWS::SQS::Queue",
        "Properties" : {
        }
    }
}