discover_args

Summary

invalid argument to `nanook discover`: {0}

Help

see nanook discover --list for valid detector groups

Details

When this fires

nanook discover got an argument it doesn't recognize. The most common case is passing a detector group that isn't registered, e.g. --only foo when foo isn't a known detector. The message embeds the offending input.

What to check

List the valid detector groups, then pick from those:

nanook discover --list

Then narrow the run:

nanook discover --only systemd,docker

The flag takes registered detector names only, no free-form filters.