9router

Fleet-wide custom Docker images make digest-based upgrade playbooks obsolete; verification shifts to app endpoints, upgrade path becomes clone→build→transfer.

TL;DR: Locally built Docker images broke my Ansible upgrade playbook, since digest comparison needs a remote registry image that custom builds never have. Automation has permanently forked for these hosts. Upgrades are now manual: build locally, transfer via scp, docker load, then swap containers with about 15 seconds downtime while data mounts stay untouched.