{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "AWS CloudFormation template for ethereum node deployment",
    "Parameters": {
        "KeyName": {
            "Description": "Name of an existing EC2 KeyPair to enable SSH access to the instance",
            "Type": "AWS::EC2::KeyPair::KeyName",
            "ConstraintDescription": "Can contain only ASCII characters."
        },
        "InstanceCount": {
            "Description": "Number of instances to deploy",
            "Type": "Number",
            "ConstraintDescription": "Integers only"
        },
        "ETHStatsServer": {
            "Description": "Ethstats server",
            "Type": "String",
            "Default": "t2.micro",
            "AllowedValues": [
                "t1.micro",
                "t2.micro",
                "t2.small",
                "t2.medium",
                "m1.small",
                "m1.medium",
                "m1.large"
            ],
            "ConstraintDescription": "Must be a valid EC2 instance type"
        },
        "ETHStatsPassword": {
            "Description": "Password to connect to ethstats server",
            "Type": "String",
            "ConstraintDescription": "String only"
        },
        "InstanceType": {
            "Description": "WebServer EC2 instance type",
            "Type": "String",
            "Default": "t2.medium",
            "AllowedValues": [
                "t1.micro",
                "t2.micro",
                "t2.small",
                "t2.medium",
                "m1.small",
                "m1.medium",
                "m1.large",
                "m1.xlarge",
                "m2.xlarge",
                "m2.2xlarge",
                "m2.4xlarge",
                "m3.medium",
                "m3.large",
                "m3.xlarge",
                "m3.2xlarge",
                "c1.medium",
                "c1.xlarge",
                "c3.large",
                "c3.xlarge",
                "c3.2xlarge",
                "c3.4xlarge",
                "c3.8xlarge",
                "g2.2xlarge",
                "r3.large",
                "r3.xlarge",
                "r3.2xlarge",
                "r3.4xlarge",
                "r3.8xlarge",
                "i2.xlarge",
                "i2.2xlarge",
                "i2.4xlarge",
                "i2.8xlarge",
                "hi1.4xlarge",
                "hs1.8xlarge",
                "cr1.8xlarge",
                "cc2.8xlarge",
                "cg1.4xlarge",
                "i3.large",
                "i3.xlarge",
                "i3.2xlarge",
                "i3.4xlarge",
                "i3.8xlarge",
                "i3.16xlarge"
            ],
            "ConstraintDescription": "Must be a valid EC2 instance type"
        },
        "SSHLocation": {
            "Description": "The IP address range that can be used to SSH to the EC2 instances",
            "Type": "String",
            "MinLength": "9",
            "MaxLength": "18",
            "Default": "0.0.0.0/0",
            "AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
            "ConstraintDescription": "Must be a valid IP CIDR range of the form x.x.x.x/x"
        }
    },
    "Conditions": {
        "IsNVME": {
            "Fn::Or": [
                {
                    "Fn::Equals": [
                        "i3.large",
                        {
                            "Ref": "InstanceType"
                        }
                    ]
                },
                {
                    "Fn::Equals": [
                        "i3.xlarge",
                        {
                            "Ref": "InstanceType"
                        }
                    ]
                },
                {
                    "Fn::Equals": [
                        "i3.2xlarge",
                        {
                            "Ref": "InstanceType"
                        }
                    ]
                },
                {
                    "Fn::Equals": [
                        "i3.4xlarge",
                        {
                            "Ref": "InstanceType"
                        }
                    ]
                },
                {
                    "Fn::Equals": [
                        "i3.8xlarge",
                        {
                            "Ref": "InstanceType"
                        }
                    ]
                },
                {
                    "Fn::Equals": [
                        "i3.16xlarge",
                        {
                            "Ref": "InstanceType"
                        }
                    ]
                }
            ]
        }
    },
    "Mappings": {
        "AWSInstanceType2Arch": {
            "t1.micro": {
                "Arch": "64"
            },
            "t2.micro": {
                "Arch": "64"
            },
            "t2.small": {
                "Arch": "64"
            },
            "t2.medium": {
                "Arch": "64"
            },
            "m1.small": {
                "Arch": "64"
            },
            "m1.medium": {
                "Arch": "64"
            },
            "m1.large": {
                "Arch": "64"
            },
            "m1.xlarge": {
                "Arch": "64"
            },
            "m2.xlarge": {
                "Arch": "64"
            },
            "m2.2xlarge": {
                "Arch": "64"
            },
            "m2.4xlarge": {
                "Arch": "64"
            },
            "m3.medium": {
                "Arch": "64"
            },
            "m3.large": {
                "Arch": "64"
            },
            "m3.xlarge": {
                "Arch": "64"
            },
            "m3.2xlarge": {
                "Arch": "64"
            },
            "c1.medium": {
                "Arch": "64"
            },
            "c1.xlarge": {
                "Arch": "64"
            },
            "c3.large": {
                "Arch": "64"
            },
            "c3.xlarge": {
                "Arch": "64"
            },
            "c3.2xlarge": {
                "Arch": "64"
            },
            "c3.4xlarge": {
                "Arch": "64"
            },
            "c3.8xlarge": {
                "Arch": "64"
            },
            "g2.2xlarge": {
                "Arch": "64"
            },
            "r3.large": {
                "Arch": "64"
            },
            "r3.xlarge": {
                "Arch": "64"
            },
            "r3.2xlarge": {
                "Arch": "64"
            },
            "r3.4xlarge": {
                "Arch": "64"
            },
            "r3.8xlarge": {
                "Arch": "64"
            },
            "i2.xlarge": {
                "Arch": "64"
            },
            "i2.2xlarge": {
                "Arch": "64"
            },
            "i2.4xlarge": {
                "Arch": "64"
            },
            "i2.8xlarge": {
                "Arch": "64"
            },
            "hi1.4xlarge": {
                "Arch": "64"
            },
            "hs1.8xlarge": {
                "Arch": "64"
            },
            "cr1.8xlarge": {
                "Arch": "64"
            },
            "cc2.8xlarge": {
                "Arch": "64"
            },
            "i3.large": {
                "Arch": "64"
            },
            "i3.xlarge": {
                "Arch": "64"
            },
            "i3.2xlarge": {
                "Arch": "64"
            },
            "i3.4xlarge": {
                "Arch": "64"
            },
            "i3.8xlarge": {
                "Arch": "64"
            },
            "i3.16xlarge": {
                "Arch": "64"
            }
        },
        "AWSRegionArch2AMI": {
            "ap-northeast-1": {
                "64": "ami-785c491f"
            },
            "ap-northeast-2": {
                "64": "ami-94d20dfa"
            },
            "ap-south-1": {
                "64": "ami-49e59a26"
            },
            "ap-southeast-1": {
                "64": "ami-2378f540"
            },
            "ap-southeast-2": {
                "64": "ami-e94e5e8a"
            },
            "ca-central-1": {
                "64": "ami-7ed56a1a"
            },
            "eu-central-1": {
                "64": "ami-1c45e273"
            },
            "eu-west-1": {
                "64": "ami-6d48500b"
            },
            "eu-west-2": {
                "64": "ami-cc7066a8"
            },
            "sa-east-1": {
                "64": "ami-34afc458"
            },
            "us-east-1": {
                "64": "ami-d15a75c7"
            },
            "us-east-2": {
                "64": "ami-8b92b4ee"
            },
            "us-west-1": {
                "64": "ami-73f7da13"
            },
            "us-west-2": {
                "64": "ami-835b4efa"
            }
        }
    },
    "Resources": {
        "ETHRPCSecurity": {
            "Type": "AWS::EC2::SecurityGroup",
            "Properties": {
                "GroupDescription": "Enable Geth RPC Port",
                "SecurityGroupIngress": [
                    {
                        "IpProtocol": "tcp",
                        "FromPort": "8545",
                        "ToPort": "8545",
                        "CidrIp": "0.0.0.0/0"
                    },
                    {
                        "IpProtocol": "tcp",
                        "FromPort": "22",
                        "ToPort": "22",
                        "CidrIp": {
                            "Ref": "SSHLocation"
                        }
                    }
                ]
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "54b037ce-872c-458e-8876-ff95f9b58d1d"
                }
            }
        },
        "LoadBalancer": {
            "Type": "AWS::ElasticLoadBalancing::LoadBalancer",
            "Properties": {
                "AvailabilityZones": {
                    "Fn::GetAZs": ""
                },
                "Listeners": [
                    {
                        "LoadBalancerPort": "80",
                        "InstancePort": "8545",
                        "Protocol": "HTTP"
                    }
                ],
                "HealthCheck": {
                    "Target": "TCP:8545",
                    "HealthyThreshold": "3",
                    "UnhealthyThreshold": "5",
                    "Interval": "30",
                    "Timeout": "5"
                }
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "4369026b-a90f-474b-8fcd-b636341ea415"
                }
            }
        },
        "EC2Group": {
            "Type": "AWS::AutoScaling::AutoScalingGroup",
            "Properties": {
                "AvailabilityZones": {
                    "Fn::GetAZs": ""
                },
                "MinSize": {
                    "Ref": "InstanceCount"
                },
                "MaxSize": {
                    "Ref": "InstanceCount"
                },
                "LoadBalancerNames": [
                    {
                        "Ref": "LoadBalancer"
                    }
                ],
                "LaunchConfigurationName": {
                    "Ref": "LaunchConfiguration"
                }
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "d509e6f2-dd24-460d-8532-e98791c13777"
                }
            }
        },
        "LaunchConfiguration": {
            "Type": "AWS::AutoScaling::LaunchConfiguration",
            "Properties": {
                "ImageId": {
                    "Fn::FindInMap": [
                        "AWSRegionArch2AMI",
                        {
                            "Ref": "AWS::Region"
                        },
                        {
                            "Fn::FindInMap": [
                                "AWSInstanceType2Arch",
                                {
                                    "Ref": "InstanceType"
                                },
                                "Arch"
                            ]
                        }
                    ]
                },
                "InstanceType": {
                    "Ref": "InstanceType"
                },
                "BlockDeviceMappings": [
                    {
                        "DeviceName": "/dev/sda1",
                        "Ebs": {
                            "VolumeSize": "80"
                        }
                    }
                ],
                "KeyName": {
                    "Ref": "KeyName"
                },
                "SecurityGroups": [
                    {
                        "Ref": "ETHRPCSecurity"
                    }
                ],
                "UserData": {
                    "Fn::Base64": {
                        "Fn::Join": [
                            "",
                            [
                                "#!/bin/bash -xe\n",
                                "apt -y update\n",
                                "DEBIAN_FRONTEND=noninteractive apt-get -y upgrade\n",
                                "apt install -y docker.io screen\n",
                                "mkdir /ethereum\n",
                                {
                                    "Fn::If": [
                                        "IsNVME",
                                        {
                                            "Fn::Join": [
                                                "",
                                                [
                                                    "mkfs.ext4 -F /dev/nvme0n1\n",
                                                    "mount /dev/nvme0n1 /ethereum\n",
                                                    "chmod a+w /ethereum/\n",
                                                    "echo UUID=`sudo blkid -s UUID -o value /dev/disk/by-id/nvme-Amazon*` /ethereum/ ext4 discard,defaults,nofail 0 2 | sudo tee -a /etc/fstab\n"
                                                ]
                                            ]
                                        },
                                        ""
                                    ]
                                },
                                "export INSTANCEID=$(curl -s http://169.254.169.254/latest/meta-data/instance-id)\n",
                                "docker pull myetherwallet/docker-geth-lb:geth-instance\n",
                                "/usr/bin/screen -m -d -S docker docker run -e WS_SECRET='",
                                {
                                    "Ref": "ETHStatsPassword"
                                },
                                "' -e WS_SERVER='",
                                {
                                    "Fn::GetAtt": [
                                        "EthstatsInstance",
                                        "PublicIp"
                                    ]
                                },
                                "' -e INSTANCE_NAME=\"mew-geth-instance-$INSTANCEID\" -it -p 8546:8546 -p 8545:8545 -p 30303:30303 -v /ethereum:/root/.ethereum --restart unless-stopped myetherwallet/docker-geth-lb:geth-instance \n"
                            ]
                        ]
                    }
                }
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "61d5b9ec-16cf-48f4-8d7d-861cc7e781e7"
                }
            }
        },
        "EthstatsInstance": {
            "Type": "AWS::EC2::Instance",
            "Properties": {
                "ImageId": {
                    "Fn::FindInMap": [
                        "AWSRegionArch2AMI",
                        {
                            "Ref": "AWS::Region"
                        },
                        {
                            "Fn::FindInMap": [
                                "AWSInstanceType2Arch",
                                {
                                    "Ref": "InstanceType"
                                },
                                "Arch"
                            ]
                        }
                    ]
                },
                "InstanceType": {
                    "Ref": "ETHStatsServer"
                },
                "BlockDeviceMappings": [
                    {
                        "DeviceName": "/dev/sda1",
                        "Ebs": {
                            "VolumeSize": "15"
                        }
                    }
                ],
                "KeyName": {
                    "Ref": "KeyName"
                },
                "Tags": [
                    {
                        "Key": "Name",
                        "Value": "ETHStatsServer"
                    }
                ],
                "SecurityGroups": [
                    {
                        "Ref": "ETHStatsSecurity"
                    }
                ],
                "UserData": {
                    "Fn::Base64": {
                        "Fn::Join": [
                            "",
                            [
                                "#!/bin/bash -xe\n",
                                "apt update -y\n",
                                "apt install -y docker.io screen\n",
                                "docker pull myetherwallet/docker-geth-lb:ethstats-instance\n",
                                "/usr/bin/screen -m -d -S docker docker run -it -e WS_SECRET='",
                                {
                                    "Ref": "ETHStatsPassword"
                                },
                                "' -p 3000:3000 myetherwallet/docker-geth-lb:ethstats-instance\n"
                            ]
                        ]
                    }
                }
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "65efe09a-0f3e-48c2-a30a-84d0c993d132"
                }
            }
        },
        "ETHStatsSecurity": {
            "Type": "AWS::EC2::SecurityGroup",
            "Properties": {
                "GroupDescription": "Enable Geth RPC Port",
                "SecurityGroupIngress": [
                    {
                        "IpProtocol": "tcp",
                        "FromPort": "3000",
                        "ToPort": "3000",
                        "CidrIp": "0.0.0.0/0"
                    },
                    {
                        "IpProtocol": "tcp",
                        "FromPort": "22",
                        "ToPort": "22",
                        "CidrIp": {
                            "Ref": "SSHLocation"
                        }
                    }
                ]
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "fe827154-fdc1-463d-9b70-44c556d2c5ee"
                }
            }
        }
    },
    "Outputs": {
        "URL": {
            "Description": "The URL of the node",
            "Value": {
                "Fn::Join": [
                    "",
                    [
                        "http://",
                        {
                            "Fn::GetAtt": [
                                "LoadBalancer",
                                "DNSName"
                            ]
                        }
                    ]
                ]
            }
        },
        "ETHStatsIP": {
            "Description": "IP address of the ethstats server",
            "Value": {
                "Fn::Join": [
                    "",
                    [
                        "http://",
                        {
                            "Fn::GetAtt": [
                                "EthstatsInstance",
                                "PublicIp"
                            ]
                        },
                        ":3000"
                    ]
                ]
            }
        }
    },
    "Metadata": {
        "AWS::CloudFormation::Designer": {
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}