php-fpm metrics source

[jszwedko]

Requested by user in discord: https://discord.com/channels/742820443487993987/759154784309215252/830879932510371861

php-fpm seems to be able to expose a status page similar to Apache's mod_status: https://www.tecmint.com/enable-monitor-php-fpm-status-in-nginx/ . We could add a source component similar to our apache_metrics and nginix_metrics sources to pull this information.

[yakimov]

+++
This is a very useful metric for sites that uses PHP.
DevOps will be able to control important parameters and will tune them if it's needed.
I would say it's more important data than data from Nginx or Apache metrics.

[neilmcguigan]

for now, you can do the following (creates logs...use log_to_metric to transform to metrics):

phpfpm_status:
  type: http_client
  endpoint: "http://127.0.0.1/status?json&full"
  decoding:
    codec: json

[nsteinmetz]

The issue I have right now is that the output of http://127.0.0.1/status?json is:

{
  "pool": "somecorp.com",
  "process manager": "static",
  "start time": 1726513970,
  "start since": 5312,
  "accepted conn": 22292,
  "listen queue": 0,
  "max listen queue": 0,
  "listen queue len": 0,
  "idle processes": 96,
  "active processes": 4,
  "total processes": 100,
  "max active processes": 13,
  "max children reached": 0,
  "slow requests": 0
}

But seems vector fails to decode and returns an empty output.

Any idea on this ?