Dilshan Wijesooriya, Senior Cloud Engineer at Coolblue, explains how upgrading from Amazon Linux 2 to AL2023 broke their cluster autoscaler due to stricter IMDS (Instance Metadata Service) access controls.

The autoscaler had been silently relying on the EC2 instance role instead of having its own pod-level IAM role—a hidden dependency that only surfaced when the AMI changed and blocked access to instance credentials.

Watch the full episode: https://ku.bz/T_YPfTfDb