{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description" : "this is my sample template.",
  "Resources" : {
    "SampleSG" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "DeletionPolicy" : "Delete",
      "Properties" : {
        "GroupDescription" : "this is a sample.",
        "SecurityGroupIngress" : [
          { "IpProtocol" : "tcp", "FromPort" : "22", "ToPort" : "22", "CidrIp" : "XXX.XXX.XXX.XXX" },
          { "IpProtocol" : "tcp", "FromPort" : "5432", "ToPort" : "5432", "CidrIp" : "XXX.XXX.XXX.XXX" }
         ]
      }
    }, 
    "SampleInstance" : {
      "Type" : "AWS::EC2::Instance",
      "DeletionPolicy" : "Delete",
      "Properties" : {
        "Tags" : [
          { "Key" : "Name", "Value" : "SampleInstance" }
        ],
        "ImageId" : "ami-00000000",
        "InstanceType" : "t2.micro",
        "AvailabilityZone" : "ap-notrheast-1",
        "SecurityGroups" : [ { "Ref" : "SampleSG" } ],
        "UserData" : { "Fn::Base64" : { "Fn::Join" : [ "", [
          "#!/bin/bash -v\n",
          "yum update -y aws-cfn-bootstrap\n",
          
          "# wait for the EBS volume to show up\n",
          "while [ ! -e /dev/sdh ]; do echo Waiting for EBS volume to attach; sleep 5; done\n",
          "while [ ! -e /dev/sdi ]; do echo Waiting for EBS volume to attach; sleep 5; done\n",
          "while [ ! -e /dev/sdj ]; do echo Waiting for EBS volume to attach; sleep 5; done\n",

          "# mount EBS volume\n",
          "mount /dev/sdh /var/lib/pgsql9/data1\n",
          "mount /dev/sdi /var/lib/pgsql9/data2\n",
          "mount /dev/sdj /var/lib/pgsql9/data3\n",
          
          "# start postgresql server\n",
          "service postgresql start\n"
        ]]}}
      }
    },
    "File" : {
      "Type" : "AWS::EC2::Volume",
      "DeletionPolicy" : "Delete",
      "Properties" : {
        "AvailabilityZone" : "ap-notrheast-1",
        "Encrypted" : "false",
        "VolumeType" : "standard",
        "Size" : "10"
      }
    },
    "MountPointFile" : {
      "Type" : "AWS::EC2::VolumeAttachment",
      "Properties" : {
        "InstanceId" : { "Ref" : "SampleInstance" },
        "VolumeId" : { "Ref" : "File" },
        "Device" : "/dev/sdf"
      }
    },
    "DatabaseVolumeDB01" : {
      "Type" : "AWS::EC2::Volume",
      "DeletionPolicy" : "Delete",
      "Properties" : {
        "AvailabilityZone" : "ap-notrheast-1",
        "SnapshotId" : "snap-00000001",
        "Encrypted" : "false",
        "VolumeType" : "standard",
        "Size" : "10"
      }
    },
    "MountPointDB01" : {
      "Type" : "AWS::EC2::VolumeAttachment",
      "Properties" : {
        "InstanceId" : { "Ref" : "SampleInstance" },
        "VolumeId" : { "Ref" : "DatabaseVolumeDB01" },
        "Device" : "/dev/sdh"
      }
    },
    "DatabaseVolumeDB02" : {
      "Type" : "AWS::EC2::Volume",
      "DeletionPolicy" : "Delete",
      "Properties" : {
        "AvailabilityZone" : "ap-notrheast-1",
        "SnapshotId" : "snap-00000002",
        "Encrypted" : "false",
        "VolumeType" : "standard",
        "Size" : "10"
      }
    },
    "MountPointDB02" : {
      "Type" : "AWS::EC2::VolumeAttachment",
      "Properties" : {
        "InstanceId" : { "Ref" : "SampleInstance" },
        "VolumeId" : { "Ref" : "DatabaseVolumeDB02" },
        "Device" : "/dev/sdi"
      }
    },
    "DatabaseVolumeDB03" : {
      "Type" : "AWS::EC2::Volume",
      "DeletionPolicy" : "Delete",
      "Properties" : {
        "AvailabilityZone" : "ap-notrheast-1",
        "SnapshotId" : "snap-00000003",
        "Encrypted" : "false",
        "VolumeType" : "standard",
        "Size" : "10"
      }
    },
    "MountPointDB03" : {
      "Type" : "AWS::EC2::VolumeAttachment",
      "Properties" : {
        "InstanceId" : { "Ref" : "SampleInstance" },
        "VolumeId" : { "Ref" : "DatabaseVolumeDB03" },
        "Device" : "/dev/sdj"
      }
    }
  }
}