Enable people to easily get the specific info they need out of rack about rack HOT 5 OPEN

Yeah, I think using a third-party tool is the way to go here. There already exist tools like the one you mentioned that do that stuff so well. In addition, rack already has the ability to pick out pieces of data to a degree. For your example, something like this:
rack servers instance list --fields id --name rum
You'd just have to cut off the header with tail or the like.

from rack.

For some fields, you can use regex for selection:

$ rack servers instance list --name='nature.*'
ID                  Name                Status  Public IPv4 Private IPv4    Image                   Flavor
3e97f1a7-5831-4ac3-83f2-2d72d2171282    nature-iad-012-user.tmpnb.org   ACTIVE  104.130.19.9    10.184.11.63    06bb130b-7607-46f9-85ae-124bae4d0f5b    onmetal-compute1
1a7ba589-a388-4ff6-9b5d-c05912d6f6ac    nature-iad-012.tmpnb.org    ACTIVE  162.242.224.119 10.223.242.196  598a4282-f14b-4e50-af4c-b3e52749d9f9    performance2-15
62b2438f-b786-4a7a-a47f-0af1a2f7f847    nature.tmpnb.org        ACTIVE  104.130.19.7    10.184.5.249    06bb130b-7607-46f9-85ae-124bae4d0f5b    onmetal-compute1

from rack.

Sounds good. I'm fine with leaving this open as a reminder to document one solution or close this and open another issue explicitly for doing the doc.

from rack.

I think right now this is mostly documenting common use cases like @everett-toews has explained above. No code changes for now.

from rack.

This should be addressed outside of the core docs, but rather as a how-to with more example use cases.

from rack.