4 ways to use Argo CD and Terraform together

Terraform and Argo CD are two popular tools used in modern DevOps practices, with Terraform being the leading choice for implementing Infrastructure as Code (IaC) and Argo CD excelling in GitOps deployments on Kubernetes. While many resources exist for using these tools independently, there is less guidance on how to effectively integrate them, especially in terms of passing information like variables and secrets between Terraform and Argo CD. To address this, the guide outlines four approaches, including using DNS, committing files to Git, injecting Kubernetes resources directly, and using the GitOps bridge project, each with its own advantages and drawbacks. Additionally, Crossplane is mentioned as an alternative that combines infrastructure management and GitOps-style application deployment, offering a more integrated solution but requiring significant migration efforts. The guide emphasizes the importance of understanding the trade-offs of each method and tailoring the approach based on the specific needs and constraints of the organization.