Dynamic smonctl

[Kek5chen]

Implements #5

Squeezed this one in today. Tested in Lab. Should be fine but have a look.

[Kek5chen]

README changes are missing.

[loulecrivain]

hi, no problem with the code as far as I can see (I'm not very good with Go!). however I'd like us to be more feature-complete regarding smonctl output parsing (please see comments).

IMO it doesn't seem a lot more code to add PSU state support. I know in the past with hwmon.yml it was a raw type configured by hand, but we also need to parse this automatically.

thanks for your work!

[loulecrivain]

README changes are missing.

Oh yes, and also, while we're at it, please do this too 🌞

[loulecrivain]

This is not working on latest Cumulus Linux. Smonctl uses different output formats between versions (probably because of changes in other tool/daemons used by CL), and thus there's no driver_hwmon nor a driver_path in its output on the latest version. See for yourself:

• on LSCL0001

    {
        "name": "PSU1", 
        "start_time": 1725878482, 
        "psu1_pwr_status": 1, 
        "state": "OK", 
        "prev_state": "OK", 
        "prev_msg": null, 
        "msg": null, 
        "psu1_power": 34, 
        "log_time": 1725878482, 
        "type": "power", 
        "psu1_status": 1, 
        "description": "PSU1"
    }

• on LSCE0001:

      {
        "driver_hwmon": [
            "psu_pwr1"
        ], 
        "name": "PSU1", 
        "start_time": 1743596939, 
        "psu_pwr1_all_ok": "1", 
        "state": "OK", 
        "prev_state": "OK", 
        "psu_pwr1_present": "1", 
        "msg": null, 
        "prev_msg": null, 
        "log_time": 1743596939, 
        "driver_path": "/sys/bus/i2c/devices/0-0030", 
        "type": "power", 
        "description": "PSU1"
    }

IMO it'd be better to change the architecture here, and to rely on values which are directly on smonctl's output instead of parsing them ourselves from /sys 🤔 They have used the same keys for values over different versions.

[loulecrivain]

other than that, I have no other comments regarding specific parts of the code.

[Kek5chen]

rebased on master

[Kek5chen]

I'm going to make a new PR so these changes land on master. It's a bit less cluttered

[Kek5chen]

manually merged