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fix-iostat-collector
cc-metric-collector/collectors/nfsiostatMetric.md
Thomas Gruber 03cd965099 Merge develop into main for documentation (#143) 
* Fix Release part

* Fix Release part

* Update Hugo integration (#142)
2025-04-17 11:37:47 +02:00

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nfsiostat collector

  "nfsiostat": {
    "exclude_metrics": [
      "oread", "pageread"
    ],
    "exclude_filesystems": [
      "/mnt"
    ],
    "use_server_as_stype": false,
    "send_abs_values": false,
    "send_derived_values": true
  }

The nfsiostat collector reads data from /proc/self/mountstats and outputs a handful node metrics for each NFS filesystem. If a metric or filesystem is not required, it can be excluded from forwarding it to the sink. Note: When excluding metrics, you must provide the base metric name (e.g. pageread) without the nfsio_ prefix. This exclusion applies to both absolute and derived values.

Metrics:

  • nfsio_nread: Bytes transferred by normal read() calls
  • nfsio_nwrite: Bytes transferred by normal write() calls
  • nfsio_oread: Bytes transferred by read() calls with O_DIRECT
  • nfsio_owrite: Bytes transferred by write() calls with O_DIRECT
  • nfsio_pageread: Pages transferred by read() calls
  • nfsio_pagewrite: Pages transferred by write() calls
  • nfsio_nfsread: Bytes transferred for reading from the server
  • nfsio_nfswrite: Pages transferred by writing to the server

For each of these, if derived values are enabled, an additional metric is sent with the _bw suffix, which represents the rate:

  • For normal byte metrics: unit=bytes/sec
  • For page metrics: unit=4K_pages/s

The nfsiostat collector adds the mountpoint to the tags as stype=filesystem,stype-id=<mountpoint>. If the server address should be used instead of the mountpoint, use the use_server_as_stype config setting.