AWS consultant Matt Lea shares essential best practices for managing cloud infrastructure, emphasizing that incident response is a result of decisions made long before an outage occurs.

Key Points

• Use Infrastructure as Code (IaC) tools like Terraform or OpenTofu instead of manual console provisioning to ensure consistency and reproducibility.
• Replace long-lived access keys with IAM roles to minimize the risk of credential leaks and unauthorized system access.
• Implement granular IAM permissions and avoid wildcard characters to prevent minor security incidents from becoming catastrophic failures.
• Isolate sensitive backend resources in private subnets and use security groups to restrict lateral movement within your network.
• Treat servers as disposable "cattle" rather than "puppies" by using containerization and automated build pipelines for deployments.
• Practice incident response through simulated outages, such as those offered by Cloud War Games, to build team resilience before real emergencies happen.

Why it Matters

Proactive infrastructure management prevents the common "convenience-first" mistakes that lead to costly downtime and security breaches. By aligning development workflows with secure, automated standards, teams can reduce the stress of 3 a.m. outages and ensure their systems remain reliable under pressure.