I’m using the node.js module to collect metrics. It is working well out of the box. But What I’d like to do is compare metrics between different servers running in my swarm. Is there some way that I can categorise the metrics by server (e.g. IP address)? Perhaps by adding a tag or category of some sort in the node.js code, so that I can then limit display of metrics to only one of those categories/tags (but still display metric across all categories/tags too)?