Terraform Aws_route_table_association Multiple Subnets

When working with AWS infrastructure using Terraform, it’s common to have multiple subnets that need to be associated with a single route table. This can be achieved easily using the aws_route_table_association resource in Terraform.

To associate multiple subnets with a route table, you simply need to create a separate aws_route_table_association resource for each subnet. Each association resource will specify the subnet_id and route_table_id to connect the subnet with the route table.

Terraform Aws_route_table_association Multiple Subnets

Example Terraform Configuration

Here’s an example Terraform configuration code snippet to demonstrate how to associate multiple subnets with a route table:


resource "aws_route_table_association" "subnet_association_1" 
  subnet_id      = aws_subnet.subnet1.id
  route_table_id = aws_route_table.main.id


resource "aws_route_table_association" "subnet_association_2" 
  subnet_id      = aws_subnet.subnet2.id
  route_table_id = aws_route_table.main.id

In this example, we create two route table associations, one for subnet1 and another for subnet2, both associated with the main route table. This setup allows traffic from both subnets to be routed through the main route table.

Benefits of Using Terraform for Route Table Associations

By using Terraform to manage route table associations for multiple subnets, you can easily automate the process of setting up and maintaining your AWS infrastructure. Terraform’s declarative configuration language allows you to define your infrastructure as code, making it easy to version control, repeat, and scale your configurations.

Additionally, Terraform provides a clear and structured way to manage your AWS resources, making it easier to track changes, troubleshoot issues, and collaborate with team members. With Terraform, you can ensure consistency and reliability in your AWS infrastructure setup.

By following these best practices and utilizing Terraform for managing route table associations for multiple subnets, you can streamline your AWS infrastructure management process and ensure a more efficient and scalable setup.