AWS CloudFormation: How to output a machine's PublicIP?

Question

I wrote a CloudFormation template which creates a linux docker host.

I want to display the PublicIP of the machine under the "Outputs" section.

This is t

Answer 1

Assuming your have an EC2 instance resource in your template named Server:

"Server" : {
    "Type" : "AWS::EC2::Instance",
    "Properties" : {
    }
}

You output the public IP address referencing it's resource name:

"Outputs" : {
    "PublicIp" : {
      "Value" : { "Fn::GetAtt" : [ "Server", "PublicIp" ]},
      "Description" : "Server's PublicIp Address"
    }
}