Ansible & Terraform

Infrastructure as Code (IaC) is often perceived as a topic for large tech corporations – with massive cloud environments and dedicated DevOps teams. Yet mid-sized companies in particular benefit significantly from automated infrastructure management, often with a manageable entry effort.

The Core Problem: Manually Maintained Infrastructure

In many IT environments, infrastructure is still configured manually: a server set up by hand here, a firewall rule adjusted by clicking through a UI there. The result is a landscape that becomes undocumented and hard to trace over time. When an employee who had the configuration in their head leaves the company, knowledge gaps arise that can become costly.

Infrastructure as Code solves this problem by describing infrastructure and configuration as code – versioned, traceable, and repeatable.

Terraform: Describing Infrastructure Declaratively

Terraform is particularly well suited for provisioning the infrastructure itself: virtual machines, networks, storage, or cloud resources on Azure, AWS, or GCP. Instead of executing commands step by step, the desired target state is described – Terraform takes care of establishing that state and automatically adjusting it when changes occur.

The advantage for mid-sized companies: an environment that’s been set up once can be reproduced, for example for test systems or in a disaster recovery scenario – without days of manual reconstruction.

Ansible: Configuration and Automation in Detail

While Terraform primarily provisions the infrastructure, Ansible handles the configuration within that environment – such as installing software, applying patches, or distributing configuration files. Since Ansible works without agents on the target systems and uses YAML-based, easy-to-read playbooks, the barrier to entry is comparatively low.

Repetitive tasks in particular, such as patch management across a large number of servers, can be significantly accelerated with Ansible – and, above all, repeated consistently and error-free.

Getting Started Doesn’t Have to Be Radical

A common misconception: Infrastructure as Code requires a complete overhaul of IT. In practice, a gradual approach is recommended – for example, starting with the automation of a single, recurring process such as server patching or setting up test environments. The learning effect and the time saved usually provide the motivation to gradually expand into other areas.

Embedded in a CI/CD pipeline with Jenkins or comparable tools, the degree of automation can then be increased further – all the way to fully automated deployments.

Conclusion

Infrastructure as Code is not a privilege reserved for large corporations, but a practical path for companies of any size to reduce sources of error and free up valuable IT resources. Terraform and Ansible complement each other ideally: one for provisioning the infrastructure, the other for configuring it – together forming the basis for IT that is documented, repeatable, and future-proof.