Building Serverless Architectures

Adding private subnets

Now we need to add two private subnets under this VPC:

"PrivateSubnet1": { 
  "Type": "AWS::EC2::Subnet", 
    "Properties": { 
    "VpcId": { 
      "Ref": "VPC" 
    }, 
    "CidrBlock": "10.0.1.0/24", 
    "AvailabilityZone": { 
      "Fn::Select": [ "0", 
        { 
          "Fn::GetAZs": { 
            "Ref": "AWS::Region" 
          } 
        } 
      ] 
    }, 
    "Tags": [ 
      { 
        "Key": "Name", 
        "Value": { 
          "Fn::Sub": "${AWS::StackName}: Private Subnet 1" 
         } 
      } 
    ] 
  } 
}, 
"PrivateSubnet2": { 
  "Type": "AWS::EC2::Subnet", 
  "Properties": { 
    "VpcId": { 
      "Ref": "VPC" 
    }, 
    "CidrBlock": "10.0.3.0/24", 
    "AvailabilityZone": { 
      "Fn::Select": [ 
        "1", 
        { 
          "Fn::GetAZs": { 
            "Ref": "AWS::Region" 
          } 
        } 
      ] 
    }, 
    "Tags": [ 
      { 
        "Key": "Name", 
        "Value": { 
          "Fn::Sub": "${AWS::StackName}: Private Subnet 2" 
        } 
      } 
    ] 
  } 
} 

Here we tell the VPC to create subnets. For the first ...