query

Limit results to a specific instance

I am guessing they never call it a node or a host because it could be anything. Even a boat. Maybe it is a container? Then it isn’t really a host I guess.

node_disk_written_bytes_total{instance="ix.int.wafflelab.online:9100"}

Exclude an item from the results

Use a negative regex match (!= instead of = or =~).

node_network_receive_bytes_total > 0 and node_network_receive_bytes_total{instance!="junction.int.wafflelab.online:9100"}

rate

rate() wants both a metric and a timeframe (I guess?).

rate(node_cpu_seconds_total{mode="system"}[5m])