So on one server, I run 2 nodes and I'm using node exporter to display RAM metrics on Grafana. The issue is that Grafana displays the total RAM usage from the server but I would like to display RAM usage for each node separately.
node_memory_MemTotal_bytes{instance=~"$node"} - node_memory_MemAvailable_bytes{instance=~"$node"}
How can I show only RAM from 1 node, for example only for one service (systemd) running, or split it by linux user?