Route tables configuration in AWS - Mini Project: Build & Apply

Route tables configuration

📖 Scenario: You are setting up a simple network in AWS. You need to create a route table for a Virtual Private Cloud (VPC) and add routes to direct traffic properly.

🎯 Goal: Build an AWS route table configuration with a route to the internet gateway and associate it with a subnet.

📋 What You'll Learn

Create a route table resource named MyRouteTable in the VPC with ID vpc-123abc.

Add a route to 0.0.0.0/0 that points to the internet gateway with ID igw-456def.

Associate the route table with the subnet having ID subnet-789ghi.

💡 Why This Matters

🌍 Real World

Route tables control how network traffic flows inside a cloud network. Setting them up correctly is essential for internet access and secure communication.

💼 Career

Cloud engineers and architects regularly configure route tables to manage network traffic and ensure resources can communicate as intended.

1

Create the route table resource

Create a resource called MyRouteTable of type AWS::EC2::RouteTable with the property VpcId set to vpc-123abc.

AWS

# Your code here to create MyRouteTable resource

Need a hint?

Use the Resources section and specify Type and Properties correctly.

2

Add a route to the internet gateway

Add a resource called MyRoute of type AWS::EC2::Route with properties: RouteTableId set to !Ref MyRouteTable, DestinationCidrBlock set to 0.0.0.0/0, and GatewayId set to igw-456def.

AWS

Resources:
  MyRouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: vpc-123abc
# Your code here to add MyRoute resource

Need a hint?

Use !Ref MyRouteTable to link the route to the route table.

3

Associate the route table with a subnet

Add a resource called MySubnetRouteTableAssociation of type AWS::EC2::SubnetRouteTableAssociation with properties: SubnetId set to subnet-789ghi and RouteTableId set to !Ref MyRouteTable.

AWS

Resources:
  MyRouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: vpc-123abc
  MyRoute:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref MyRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: igw-456def
# Your code here to add MySubnetRouteTableAssociation resource

Need a hint?

Use the association resource to link the subnet and route table.

4

Complete the CloudFormation template

Add the top-level AWSTemplateFormatVersion set to 2010-09-09 and Description with the text Simple route table setup at the beginning of the template.

AWS

# Your code here to add AWSTemplateFormatVersion and Description
Resources:
  MyRouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: vpc-123abc
  MyRoute:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref MyRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: igw-456def
  MySubnetRouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: subnet-789ghi
      RouteTableId: !Ref MyRouteTable

Need a hint?

These top-level fields help AWS understand your template version and purpose.