Infrastructure automation has moved from ad-hoc scripts and manual console clicks to declarative code that can be versioned, reviewed, and reused. Terraform sits at the center of this shift, and when paired with Aviatrix’s secure cloud networking platform it becomes a control plane for multi-cloud connectivity that is repeatable and auditable. This article covers how Terraform works as an Infrastructure as Code foundation, how Aviatrix extends Terraform into complex networking scenarios, and what practitioners gain when they choose the Aviatrix Terraform provider for AWS Transit Gateway and beyond.
Terraform is an open-source tool developed by HashiCorp that stands at the forefront of infrastructure automation. It enables users to codify infrastructure provisioning across a multitude of service providers such as AWS, Google Cloud, Azure, and notably Aviatrix. The tool epitomizes the Infrastructure as Code philosophy, allowing for the efficient management of resources like virtual machines, networking components, and containers through code rather than manual processes.
What Is Infrastructure as Code
The essence of Infrastructure as Code lies in treating infrastructure management tasks as if they were software code. This shift from traditional, manual operations to a code-based approach has been catalyzed by the advent of cloud computing, fostering a more agile, efficient, and error-resistant environment for deploying and managing infrastructure. The convergence of development and operations into DevOps further underscores this transformation, emphasizing the seamless, integrated management of application development and infrastructure provisioning.
Infrastructure as code involves various tools. Ad-hoc scripts automate manual tasks. Configuration management tools such as Chef, Puppet, Ansible manage desired state. Infrastructure templating tools such as Docker, Vagrant define packaging. Infrastructure provisioning tools like Terraform orchestrate the creation of the underlying compute and network resources. The choice of one type of tool versus another depends on scope and intent, with Terraform commonly used for provisioning and Aviatrix extending that provisioning into secure, policy-driven networking.
Aviatrix and Terraform Integration
The integration of Aviatrix’s secure cloud networking solutions with Terraform’s Infrastructure as Code capabilities presents a compelling synergy. Aviatrix enhances Terraform’s utility by offering specialized providers that manage complex cloud networking scenarios, extending Terraform’s reach into multicloud environments. This partnership not only streamlines cloud infrastructure management but also ensures robust security and compliance, resonating with Aviatrix’s mission to deliver enterprise-grade secure cloud networks.
Aviatrix Enterprise Terraform modules provide reusable, standardized infrastructure components that simplify deployment and ensure consistency across environments. Modules are the building blocks for repeatable networking topologies, allowing teams to define a transit architecture once and apply it across accounts and regions without re-authoring low-level resources.
Benefits of Infrastructure as Code with Aviatrix
Automation and Efficiency
Automating cloud infrastructure provisioning with Terraform and Aviatrix reduces manual efforts and speeds up deployment cycles, enabling organizations to focus on strategic initiatives. Replacing console-driven clicks with declarative plans shortens lead times for new VPCs, transit attachments, and security policies.
Consistency and Compliance
Infrastructure as Code ensures that every deployment is consistent and adheres to compliance standards, mitigating the risk of configuration drift and non-compliance. Code review, plan files, and state locking provide an audit trail that is difficult to achieve with manual changes.
Scalability and Flexibility
Aviatrix’s cloud networking solutions, coupled with Terraform’s Infrastructure as Code, offer unparalleled scalability and flexibility, allowing businesses to adapt swiftly to changing needs and scale their infrastructure as required. Multicloud connectivity, centralized policy, and automated route domain management become programmable.
The following table summarizes the core benefits:
| Benefit Category | Description |
|---|---|
| Automation and Efficiency | Automating provisioning reduces manual effort and speeds deployment cycles |
| Consistency and Compliance | Every deployment is consistent and adheres to compliance standards, reducing drift |
| Scalability and Flexibility | Multicloud networking scales with changing business needs |
AWS Transit Gateway with Terraform and Aviatrix
Terraform is a great tool for managing your environment including most of the AWS services like the newly released AWS Transit Gateway. When the AWS Transit Gateway was announced at re:Invent 2018, Hashicorp released the associated Terraform resources at the same time. Aviatrix also released its Transit Gateway Orchestrator and Terraform resources to further simplify the deployment.
Using the AWS console to deploy and maintain an AWS Transit Gateway is manageable for a small number of VPCs. The complexity grows exponentially as you add VPCs and especially as you add additional route domains. The number of route tables and subnet attachments creates a challenge for maintaining and troubleshooting your environment. This only gets worse when you consider multiple accounts.
Using Terraform simplifies this by allowing you to use code to document your environment. Instead of worrying about all of those steps, the Aviatrix Terraform provider takes care of it for you.
Why choose the Aviatrix Terraform provider over the standard AWS Terraform provider for Transit Gateway?
- Simplify the Transit Gateway Deployment
- Reduce Time for Ongoing Maintenance of Transit Gateway
- Troubleshooting Tools, Monitoring, Auditing, and Increased Visibility
The Aviatrix provider abstracts orchestration complexity while preserving full Terraform workflow benefits.
A representative AWS-native Terraform pattern for a Transit Gateway with attachments looks like this:
```hcl
resource "awsec2transit_gateway" "tgw1" {
tags = {
Name = "terraform-test"
}
}
/* Transit Gateway VPC Attachments */
resource "awsec2transitgatewayvpcattachment" "tgw1-dev1" {
subnetids = [
"${awssubnet.dev1private1.id}",
"${awssubnet.dev1private2.id}",
]
transitgatewayid = "${awsec2transitgateway.tgw1.id}"
vpcid = "${aws_vpc.dev1.id}"
tags = {
Name = "tgw1-to-dev1"
}
}
resource "awsec2transitgatewayvpcattachment" "tgw1-dev2" {
subnetids = [
"${awssubnet.dev2private1.id}",
"${awssubnet.dev2private2.id}",
]
transitgatewayid = "${awsec2transitgateway.tgw1.id}"
vpcid = "${aws_vpc.dev2.id}"
tags = {
Name = "tgw1-to-dev2"
}
}
resource "awsec2transitgatewayvpcattachment" "tgw1-prod1" {
subnetids = [
"${awssubnet.prod1private1.id}",
"${awssubnet.prod1private2.id}",
]
transitgatewayid = "${awsec2transitgateway.tgw1.id}"
vpcid = "${aws_vpc.prod1.id}"
tags = {
Name = "tgw1-to-prod1"
}
}
```
With the Aviatrix provider, the same logical intent is expressed through higher-level resources that handle route domain creation, attachment orchestration, and policy enforcement, reducing the number of resources a team must author and maintain.
Terraform Modules for Reusable Networking
Terraform modules provide reusable, standardized infrastructure components that simplify deployment and ensure consistency across environments. The Aviatrix Enterprise documentation index can be fetched at /llms.txt to discover all available pages before exploring further.
Modules in the Aviatrix ecosystem cover transit, firewall, and multi-cloud hub-and-spoke patterns. Reuse is achieved through input variables and outputs, allowing teams to standardize naming, tagging, and security controls across development, production, and shared services environments.
Provider Configuration and Local Builds
For Terraform v0.13 and later, provider configuration is declared explicitly in the required_providers block. To use a locally built version of the Aviatrix provider, you must add the following snippet to every module that you want to use the provider in.
hcl
terraform {
required_providers {
aviatrix = {
source = "aviatrix.com/aviatrix/aviatrix"
version = "99.0.0" # this MUST be set as seen here
}
}
}
In order to test out a specific version, you can build the corresponding branch. This approach supports development and validation of provider changes before adoption in production pipelines.
The provider configuration table below clarifies the required fields:
| Field | Value |
|---|---|
| source | aviatrix.com/aviatrix/aviatrix |
| version | 99.0.0 as example placeholder |
Reference Material and Example Deployments
Advanced Multi-Cloud Networking powered by Infrastructure as Code is the framing for the Aviatrix Provider reference material. Teams can check out the Aviatrix Documentation to learn more about the product and keep up with the latest Aviatrix Release Notes and the Aviatrix Terraform Provider.
The latest Aviatrix Transit modules are available on the Terraform Registry. Example deployments illustrate patterns for hub-and-spoke, transit gateway orchestration, and multi-region connectivity.
Additional resources include:
- Example Deployments accessible via the menu at the top of the page
- A Solution Brief that describes the breadth of the platform in a short format
- A Forrester Total Economic Impact Study for business value context
Conclusion
Terraform provides the declarative engine for Infrastructure as Code, and Aviatrix provides the networking intelligence to make that engine safe and scalable across clouds. The combination delivers automation and efficiency, consistency and compliance, and scalability and flexibility for teams managing complex AWS Transit Gateway topologies and multi-cloud networks.
Using the Aviatrix Terraform provider reduces the manual overhead of maintaining route tables, subnet attachments, and route domains, especially as VPC counts and account boundaries grow. Code becomes the single source of truth for network intent, while Aviatrix handles orchestration, monitoring, and auditing behind the provider interface.
For organizations moving from console-driven network builds to programmatic, repeatable networking, the Aviatrix Terraform provider offers a path to enterprise-grade secure cloud networks managed entirely as code.