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

As mentioned in the docs, the outputs can optionally be exported for cross-stack references. In case that is your use-case:

JSON:

"Outputs" : {
  "PublicIp" : {
    "Value" : { "Fn::GetAtt" : ["Server", "PublicIp"]},
    "Description" : "Server Public IP"
    "Export" : {
      "Name" : {"Fn::Sub": "${AWS::StackName}-PublicIP"}
    }
  }
}

YAML:

Outputs:
  PublicIp:
    Description: Server Public IP
    Value: !GetAtt Server.PublicIp
    Export:
      Name: !Sub "${AWS::StackName}-PublicIp"

See also:

• AWS::EC2::Instance properties and return values in the docs.