prometheus support in nats-operator

[RyanGordon]

When nats-io/prometheus-nats-exporter#48 is completed, it would be great if the option to add prometheus exporter was added to nats-operator.

[wallyqs]

Yep agree, will take a look at adding support

[ColinSullivan1]

A note for when we implement this... the Prometheus recommended architecture is to have a prometheus NATS exporter paired with each NATS server.

[wallyqs]

That's right, so I think that the exporter container PodSpec would be running as part of the same PodSpec of the deployed NATS servers. (1 Pod = exporter + nats server)

[entone]

Any update on this?

I've added prometheus-nats-exporter, and pointed it at the headless mgmt service created by the operator. It appears to find all the pods in the cluster, but does not enumerate the pods, also some variables don't seem to be aggregated correctly.