AWS::EC2::Instance:
  Properties:
    AvailabilityZone: "\"ap-southeast-2\""
    BlockDeviceMappings: |
      [
        {
          "DeviceName" => "/dev/sda1",
          "Ebs" => {
             "DeleteOnTermination" => false,
             "Encrypted"           => false,
             "Iops"                => "1000",
             "SnapshotId"          => "snap-xxxxx",
             "VolumeSize"          => "100",
             "VolumeType"          => "standard | io1 | gp2"
          }  
        },
        {
           "DeviceName" => "/dev/sde",
           "NoDevice"   => {}
        },
        {
          "DeviceName"  => "/dev/sdc",
          "VirtualName" => "ephemeral0"
        }
      ]
    DisableApiTermination: "\"false\""
    EbsOptimized: "\"false\""
    IamInstanceProfile: "\"instance profile id\""
    ImageId: "\"ami-xxxx\""
    InstanceInitiatedShutdownBehavior: "\"stop | terminate\""
    InstanceType: "\"t2.small\""
    KernelId: "\"your kernel Id\""
    KeyName: "\"your ssh key name\""
    Monitoring: "\"true\""
    NetworkInterfaces: |
      [
        {
           "AssociatePublicIpAddress" => false,
           "DeleteOnTermination"      => true,
           "Description"              => "service nic" ,
           "DeviceIndex"              => "1",
           "GroupSet"                 => [ "sg-xxxx", "sg-xxxx" ],
           "NetworkInterfaceId"       => "An existing network interface ID.",
           "PrivateIpAddress"         => "192.168.0.111",
           "PrivateIpAddresses" => [
              {
                 "PrivateIpAddress" => "192.168.0.112",
                 "Primary"          => true
              },     
              {
                 "PrivateIpAddress" => "192.168.1.112",
                 "Primary"          => false
              }     
            ],
           "SecondaryPrivateIpAddressCount" => "The number of secondary private IP addresses that Amazon EC2 auto assigns to the network interface. ",
           "SubnetId" => "sb-xxxxxx"
        }
      ]
    PlacementGroupName: "\"pg-xxxxx\""
    PrivateIpAddress: "\"192.168.0.111\""
    RamdiskId: "\"ram-xxx\""
    SecurityGroupIds: |
      [ "sg-xxx", "sg-xxx" ] # A list that contains the security group IDs for VPC security groups
    SecurityGroups: | 
      ["sg-xxx", "sg-xxx"] #  The list can contain both the name of existing Amazon EC2 security groups or references to AWS::EC2::SecurityGroup resources created in the template.
    SourceDestCheck: "\"true\""
    SubnetId: "\"sb-xxxx\""
    Tags: |
      [
        {
          "Key"   => "Name",
          "Value" => "Test EC2"
        }
      ]
    Tenancy: "\"default | dedicated\""
    UserData: |
      FnBase64(FnJoin("/n",
        [
          "/bin/bash", 
          "exec 1<&-", 
          "exec 2<&-", 
          "exec 1<>/var/log/user-data.txt", 
          "exec 2>&1"
        ]))
    Volumes: |
      [
        {
           "Device" => "/dev/sda",
           "VolumeId" => "vol-xxxx"
        }  
      ]
    AdditionalInfo: "\"reserved property for AWS\""