[Metricbeat] Diskio metricset: error message "disk io counters: Incorrect function." when ramdisk setup

[narph]

• Version: 7.2
• Operating System: Windows
• Steps to Reproduce:
  • Setup a ramdisk
  • Run metricbeat with diskio metricset enabled

Result:

"service": {
    "type": "system"
  },
  "error": {
    "message": "disk io counters: Incorrect function."
  },
  "event": {
    "module": "system",
    "duration": 78900,
    "dataset": "system.diskio"
  },
  "metricset": {
    "name": "diskio"
  },

Diskio will check for disk type and accept any Local Fixed Disk Type even if it is ram disk. This will return an exception as it is not able to read any disk performance counters.

Workaround, specify the list of disk names you want to gather metrics on using the configuration setting:
diskio.include_devices: ["sda", "sda1"]