create_instance_on_vpc.json

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "Create a Server in specified VPC subnet",
    "Parameters": {
        "InstanceType": {
            "Description": "EC2 instance type",
            "Type": "String",
            "Default": "t1.micro",
            "AllowedValues": [
                "m1.small",
                "t1.micro"
            ]
        },
        "KeyPair": {
            "Description": "Your KeyPair Name",
            "Type": "String",
            "Default": "your_name_here"
        },
        "SubnetId": {
            "Description": "This server's subnet in subnet-xxxxxx format",
            "Type": "String",
            "Default": "subnet-xxxxxx"
        },
        "SecurityGroupIds": {
            "Description": "This server's security group",
            "Type": "String",
            "Default": "sg-xxxxxxxx"
        },
        "ServerName": {
            "Description": "This server's tag name",
            "Type": "String",
            "Default": "test bastion"
        }
    },
    "Mappings": {
        "AWSInstanceType2Arch": {
            "m1.small": {
                "Arch": "64"
            },
            "t1.micro": {
                "Arch": "64"
            }
        },
        "AWSRegionArch2AMI": {
            "ap-northeast-1": {
                "64": "ami-4e6cd34f"
            }
        }
    },
    "Resources": {
        "IPAddress": {
            "Type": "AWS::EC2::EIP",
            "Properties": {
                "Domain": "vpc",
                "InstanceId": {
                    "Ref": "Instance"
                }
            }
        },
        "WaitHandle": {
            "Type": "AWS::CloudFormation::WaitConditionHandle"
        },
        "Instance": {
            "Type": "AWS::EC2::Instance",
            "Properties": {
                "InstanceType": {
                    "Ref": "InstanceType"
                },
                "ImageId": {
                    "Fn::FindInMap": [
                        "AWSRegionArch2AMI",
                        {
                            "Ref": "AWS::Region"
                        },
                        {
                            "Fn::FindInMap": [
                                "AWSInstanceType2Arch",
                                {
                                    "Ref": "InstanceType"
                                },
                                "Arch"
                            ]
                        }
                    ]
                },
                "KeyName": {
                    "Ref": "KeyPair"
                },
                "SubnetId": {
                    "Ref": "SubnetId"
                },
                "Tags": [
                    {
                        "Key": "Name",
                        "Value": {
                            "Ref": "ServerName"
                        }
                    }
                ],
                "SecurityGroupIds": [
                    {
                        "Ref": "SecurityGroupIds"
                    }
                ],
                "UserData": {
                    "Fn::Base64": {
                        "Fn::Join": [
                            "",
                            [
                                "#!/bin/bash -v\n",
                                "yum update -y aws-cfn-bootstrap\n",
                                "# Helper function\n",
                                "function error_exit\n",
                                "{\n",
                                "  /opt/aws/bin/cfn-signal -e 0 -r \"$1\" '",
                                {
                                    "Ref": "WaitHandle"
                                },
                                "'\n",
                                "  exit 1\n",
                                "}\n",
                                "# Install Stuff through yum\n",
                                "yum update -y\n",
                                "# All is well so signal success\n",
                                "/opt/aws/bin/cfn-signal -e 0 -r \"server setup complete\" '",
                                {
                                    "Ref": "WaitHandle"
                                },
                                "'\n"
                            ]
                        ]
                    }
                }
            }
        }
    }
}