CloudFormation / CreationPolicy / Minimal EC2 example

gistfile1.txt

{
  "Resources": {
    "SSHServerSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "VpcId" : "vpc-fdcfd098",
        "GroupDescription" : "Allow SSH access",
        "SecurityGroupIngress" : [
          {"IpProtocol" : "tcp", "FromPort" : "22", "ToPort" : "22", "CidrIp" : "<REDACTED>/32"}
        ]
      }
    },
    "MyEC2": {
      "Type" : "AWS::EC2::Instance",
      "Properties" : {
        "ImageId" : "ami-db704cb8",
        "KeyName" : "<REDACTED>",
        "InstanceType" : "t2.micro",
        "NetworkInterfaces" : [ {
          "AssociatePublicIpAddress" : "true",
          "DeviceIndex" : "0",
          "GroupSet" : [ {"Ref" : "SSHServerSecurityGroup"} ],
          "SubnetId" : "subnet-eccc6988"
        } ],
      },
      "CreationPolicy": {
        "ResourceSignal": {
          "Count": 1,
          "Timeout": "PT10M"
        }
      }
    },
    "MyTestSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "DependsOn" : "MyEC2",
      "Properties" : {
        "VpcId" : "vpc-fdcfd098",
        "GroupDescription" : "A test security group",
        "SecurityGroupIngress" : [
          {"IpProtocol" : "tcp", "FromPort" : "80", "ToPort" : "80", "CidrIp" : "0.0.0.0/0"}
        ]
      }
    }
  },
  "Outputs" : {
    "PublicIp" : {
      "Value" : { "Fn::GetAtt" : [ "MyEC2", "PublicIp" ] },
      "Description" : "The instance's public IP"
    }
  }
}