How can I get the free memory available on minions using on salt?

Question

I am looking for a simple way to get information about memory usage, like free memory form the salt minions.

So far I know that the total memory can be listed using salt '*' grains.items but I don't even know how to list only just the total memory instead of the all grains data.

Second problem is that I don't know how to get the free memory returned.

Answer 1

To get the total memory, use grains.item, rather than grains.items:

salt '*' grains.item mem_total

Answer 2

salt targetminion status.meminfo

If you are parsing this, change the output formatting:

salt targetminion status.meminfo --out=json