Amazon-Web-Services

CloudFormation 中的 Aws vpc 預設路由表

  • June 3, 2019

我是否遺漏了什麼,但無法通過 CloudFormation 將路由添加到 VPC 預置的預設路由表中?

不,你不能,反正沒有什麼可參考的(例如邏輯ID)。只需創建自己的主表;-)。

可能是它無法使用的原因之一:

保護您的 VPC 的一種方法是將主路由表保留為其原始預設狀態(僅具有本地路由),並將 您創建的每個新子網與您創建的自定義路由表之一顯式關聯。這確保您必須明確控制每個子網的出站流量的路由方式

您可以自己定義每個組件,以防您需要通過 CloudFormation 實現該設置。只需創建您自己的 VPC、Internet 網關、子網和路由表。然後,您需要為特定子網顯式聲明 RouteTableAssociation 並為該表創建公共路由。這是一個例子

AWSTemplateFormatVersion: '2010-09-09'
Description: Example
Resources:
 myInternetGateway:
   Type: AWS::EC2::InternetGateway
   Properties:
     Tags:
       - Key: "Name"
         Value: "a_gateway"

 myVPC:
   Type: AWS::EC2::VPC
   Properties:
     CidrBlock: 10.0.0.0/24
     EnableDnsSupport: true
     EnableDnsHostnames: true
     InstanceTenancy: default

 # Attach Internet gateway to created VPC
 AttachGateway:
   Type: AWS::EC2::VPCGatewayAttachment
   Properties:
     VpcId:
       Ref: myVPC
     InternetGatewayId:
       Ref: myInternetGateway

 # Create public routes table for VPC
 myPublicRouteTable:
   Type: AWS::EC2::RouteTable
   Properties:
     VpcId: !Ref myVPC
     Tags:
       - Key: "Name"
         Value: "public_routes"

 # Create a route for the table which will forward the traffic
 # from the gateway
 myDefaultPublicRoute:
   Type: AWS::EC2::Route
   DependsOn: AttachGateway
   Properties:
     RouteTableId: !Ref myPublicRouteTable
     DestinationCidrBlock: 0.0.0.0/0
     GatewayId: !Ref myInternetGateway

 # Subnet within VPC which will use route table (with default route)
 # from Internet gateway
 mySubnet:
   Type: AWS::EC2::Subnet
   Properties:
     AvailabilityZone: ""
     CidrBlock: 10.0.0.0/25
     MapPublicIpOnLaunch: true
     VpcId:
       Ref: myVPC

 # Associate route table (which contains default route) to newly created subnet
 myPublicRouteTableAssociation:
   Type: AWS::EC2::SubnetRouteTableAssociation
   Properties:
     RouteTableId: !Ref myPublicRouteTable
     SubnetId: !Ref mySubnet

這樣您就可以使用創建的路由表(在上面的範例中,它用於轉發來自 Internet 網關的流量)

引用自:https://serverfault.com/questions/588904