cloudformation_ec2_instance.json

{
  "AWSTemplateFormatVersion" : "2010-09-09",

  "Description" : "make an instance, based on region, subnet, and security group. Uses AMI Mapping for Instance Store backed Amazon Linux 64bit in the region specified",

  "Parameters" : {

    "InstanceType" : {
      "Description" : "Type of Instance to use, defaults to m1.medium",
      "Type" : "String",
      "Default" : "m1.medium"
    },

    "KeyName" : {
      "Description" : "Name of and existing EC2 KeyPair to enable SSH access to the instance",
      "Type" : "String"
    },

    "VpcId" : {
      "Type" : "String",
      "Description" : "VpcId of your existing Virtual Private Cloud (VPC)"
    },

    "SubnetId" : {
      "Type" : "String",
      "Description" : "SubnetId of an existing subnet in your Virtual Private Cloud (VPC)"
    },

    "SecurityGroupId" : {
      "Type" : "String",
      "Description" : "SecurityGroup to use"
    },

    "ServerName" : {
      "Type" : "String",
      "Description" : "FQDN of the server"
    },

    "IpAddress" : {
      "Type" : "String",
      "Description" : "The IP of the server, should match DNS"
    }

  },

  "Mappings" : {
    "RegionMap" : {
      "us-east-1"      : { "AMI" : "ami-e8249881" },
      "us-west-1"      : { "AMI" : "ami-21f9de64" },
      "us-west-2"      : { "AMI" : "ami-2e31bf1e" },
      "eu-west-1"      : { "AMI" : "ami-b57474c1" },
      "sa-east-1"      : { "AMI" : "ami-1608d10b" },
      "ap-southeast-1" : { "AMI" : "ami-a8a7e7fa" },
      "ap-northeast-1" : { "AMI" : "ami-5a6cd35b" }
    }
  },

  "Resources" : {

    "EC2Instance" : {
      "Type" : "AWS::EC2::Instance",
      "Properties" : {
        "ImageId" : { 
          "Fn::FindInMap" : [ "RegionMap", { "Ref" : "AWS::Region" }, "AMI" ] },
        "SecurityGroupIds" : [{ "Ref" : "SecurityGroupId" }],
        "SubnetId" : { "Ref" : "SubnetId" },
        "PrivateIpAddress" : { "Ref" : "IpAddress"},
        "InstanceType" : { "Ref" : "InstanceType"},
        "Tags" : [ {"Key" : "Name", "Value" : { "Ref" : "ServerName"} } ],
        "UserData" : { "Fn::Base64" : 
        { "Fn::Join" : ["", 
        [
            "#!/bin/bash -v\n",
            "perl -i -pe 's/disable_root: 1/disable_root: 0/' /etc/cloud/cloud.cfg\n",
            "perl -i -pe 's/#PermitRootLogin .*/PermitRootLogin without-password/' /etc/ssh/sshd_config\n",
            "cp /home/ec2-user/.ssh/authorized_keys /root/.ssh/authorized_keys\n",
            "/etc/init.d/sshd reload\n",
            { "Fn::Join" : [ "", [ "sed -i 's/localhost.localdomain/", { "Ref" : "ServerName"}, "/g' /etc/sysconfig/network", "\n" ]]},
            { "Fn::Join" : [ "", [ "hostname ", { "Ref" : "ServerName"}, "\n" ]]},
            "yum install redhat-lsb-core -y\n",
            "yum update -y\n"
        ]
        ]
        }
      },
      "KeyName" : { "Ref" : "KeyName" }
      }
    }

  },

  "Outputs" : {
    "InstanceId" : {
      "Value" : { "Ref" : "EC2Instance" },
      "Description" : "Instance Id of newly created instance"
    },

    "InstanceIP": {
      "Value" : { "Fn::GetAtt" : [ "EC2Instance" , "PrivateIp" ] },
      "Description" : "Private IP for instance"
    },

    "Subnet" : {
      "Value" : { "Ref" : "SubnetId" },
      "Description" : "Subnet of instance"
    },

    "SecurityGroupId" : {
      "Value" : { "Ref" : "SecurityGroupId" },
      "Description" : "Security Group of instance"
    }
  }

}