The Drydock background commands currently run SSH with LogLevel set to quiet. This was originally set so that we wouldn't get SSH information showing up in Harbormaster logs, but for background Drydock allocations, it actually makes sense to show this information so that administrators can diagnose configuration issues in Drydock.
In particular, increasing the log level will give administrators information about why an SSH connection failed (was it due to network issues or authentication issues, etc.)
I have a diff for this which I'll submit after D14507 is reviewed / landed.