Can you provide an example of how you've written Infrastructure as Code (IAC) with a focus on maintaining robust security measures?

The given question is essentially asking you to explain how you have implemented Infrastructure as Code (IAC), but it particularly stresses your ability to maintain strict security throughout your code. In answering this question, you should focus on the following key points:

• Provide a brief introduction to what Infrastructure as Code is.
• Detail an actual instance where you implemented IAC with a strong emphasis on security.
• Explain the measures that were incorporated to ensure robust security and compliance.
• Mention the tools or software you used.

Remember, it's crucial to clearly express your strategies and tactics in implementing secure IAC, which should reflect your understanding of best practices.

In my previous role at XYZ Corporation, I implemented Infrastructure as Code using Terraform to create our cloud infrastructure in a way that was both repeatable and consistent. Security was a prime concern for us, so we incorporated several measures to ensure security.

The first measure was in the handling of sensitive data. We used AWS Secrets Manager to store our secrets such as database passwords, instead of embedding them in the Terraform scripts. Thus, only services with the correct permissions could access these secrets.

The second measure was integrating Identity and Access Management (IAM), defining the policies for each function to ensure they only had the minimum required access.

Also, we incorporated automatic checks using Open Policy Agent into our CI/CD pipeline, which inspected our Terraform scripts for any misconfigurations or vulnerabilities, thus providing an additional layer of security.

This way, the infrastructure setup was not just automated, but it was also secure and adhering to the principles of least privilege and isolation.

At ABC Tech, we used Ansible for Infrastructure as Code to automate the configuration of our servers. Ensuring robust security in these configurations was a priority.

To begin with, we integrated credential storage and management systems such as Hashicorp Vault to store sensitive information like API keys or SSL certificates securely. Thus, avoiding hardcoding these sensitive details into the configurations.

Secondly, all the inventory and variables files defining the infrastructure were kept on an encrypted disk space with access only available to certain privileged users, which provided a layer of resilience against data breaches.

Lastly, we included the execution of regular vulnerability scans on the configurations as part of our CI/CD pipeline, using tools like Nessus, to detect any potential security flaws.

These practices ensured our infrastructure was set up in a consistent, repeatable, and secure manner.