在云形成模板中将现有VPC添加到Ec2实例

Question

我已经创建了一个现有VPC。如何使用该VPC并通过云形成创建Ec2实例？我试图添加安全组，但失败了。

在我带有安全组的ec2实例的云形成模板下面。我试图添加一个现有的VPC。例如，我可以指向Example（MYVPC），以便在创建时将使用MYVPC创建一个ec2实例

云的形成：

     Resources:
       AppNode:
        Type: AWS::EC2::Instance
      Properties:
       InstanceType: t2.micro
   ImageId: ami-a58d0dc5
   KeyName: aws-key1
   SecurityGroups:
    - !Ref AppNodeSG
  UserData: !Base64 |
    #!/bin/bash
    apt-get update -qq
    apt-get install -y apt-transport-https ca-certificates
    apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 -- 
    recv-keys 58118E89F3A912897C070ADBF76221572C52609D
    echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" | 
    tee /etc/apt/sources.list.d/docker.list
    apt-get update -qq
    apt-get purge lxc-docker || true
    apt-get -y install linux-image-extra-$(uname -r) linux-image-extra- 
    virtual
    apt-get -y install docker-engine
    usermod -aG docker ubuntu
    mkdir -p /etc/systemd/system/docker.service.d
    printf "[Service]\nExecStart=\nExecStart=/usr/bin/dockerd -H fd:// 
    -H tcp://0.0.0.0:2375\n" >>  
    /etc/systemd/system/docker.service.d/docker.conf
    systemctl daemon-reload
    systemctl restart docker
   AppNodeSG:
      Type: AWS::EC2::SecurityGroup
      Properties:
      GroupDescription: for the app nodes that allow ssh, http and 
    docker ports
    SecurityGroupIngress:
    - IpProtocol: tcp
      FromPort: '80'
       ToPort: '80'
      CidrIp: 0.0.0.0/0
  - IpProtocol: tcp
    FromPort: '22'
    ToPort: '22'
    CidrIp: 0.0.0.0/0
  - IpProtocol: tcp
    FromPort: '2375'
    ToPort: '2375'
    CidrIp: 0.0.0.0/0