[Feature request] Expose more metrics in /v1/info

[andythsu]

Currently the only way to get stats of Trino cluster is through /ui/api/stats. However, this endpoint is protected by auth. It would be nice if we can expose the stats to public endpoint, such as /v1/info. Looking at current stats it exposes, it should be harmless to expose everything in /v1/info

  "runningQueries": 0,
  "blockedQueries": 0,
  "queuedQueries": 0,
  "activeCoordinators": 1,
  "activeWorkers": 2,
  "runningDrivers": 0,
  "totalAvailableProcessors": 24,
  "reservedMemory": 0.0,
  "totalInputRows": 671056,
  "totalInputBytes": 16269490,
  "totalCpuTimeSecs": 4

This will benefit Trino Gateway as QueryCountBasedRouter relies on these stats to work properly.

Happy to send a PR if this is a good idea :)

[nikita-sheremet-java-developer]

You can expose all of these metrics just set up JMX - with prometheus that will grab and store metrics from Trino and Grafana - for metrics visualization.

For now this looks like duplicating feature. I am not sure that Trino maintainers allow this.

[andythsu]

@nikita-sheremet-java-developer this sounds like a good approach. I will check it out. Thanks!