Configuring AWS Named Profiles for Secure Multi-Account Access

Configuring AWS Named Profiles

Named profiles allow engineers to manage credentials for multiple AWS accounts, avoiding constant credential switching and improving automation. The AWS CLI and Terraform leverage these profiles to authenticate against specific AWS resources, making multi-account infrastructure management significantly easier.

Maintaining separate profiles is crucial for adhering to the principle of least privilege and minimizing the blast radius of potential security breaches, as opposed to relying on a single, overly permissive set of credentials. The cost of credential compromise can range from data breaches to significant financial losses.

Key Insights

• AWS recommends Single Sign-On (SSO) over long-lived access keys: 2024
• Terraform uses the profile argument in the aws provider block to specify which credentials to use.
• ~/.aws/credentials stores authentication details, while ~/.aws/config stores regional and output preferences.

Working Example

# Login to an SSO profile
aws sso login --profile management-admin

# Test the profile by retrieving caller identity
aws sts get-caller-identity --profile management-admin

Practical Applications

• Stripe: Uses named profiles to manage access to different AWS environments (development, staging, production).
• Pitfall: Storing long-lived access keys directly in ~/.aws/credentials increases the risk of credential exposure and security breaches.

References:

• https://dev.to/lucasdecamargo/configuring-aws-named-profiles-7cj