MD RAID Statistics Input Plugin

This plugin gathers statistics about any Linux MD RAID arrays configured on the host by reading /proc/mdstat. For a full list of available fields see the /proc/mdstat section of the proc man page. For details on the fields check the mdstat wiki.

⭐ Telegraf v1.20.0 🏷️ system 💻 linux

Global configuration options <!-- @/docs/includes/plugin_config.md -->

Plugins support additional global and plugin configuration settings for tasks such as modifying metrics, tags, and fields, creating aliases, and configuring plugin ordering. See CONFIGURATION.md for more details.

Configuration

# Get kernel statistics from /proc/mdstat
# This plugin ONLY supports Linux
[[inputs.mdstat]]
  ## Sets file path
  ## If not specified, then default is /proc/mdstat
  # file_name = "/proc/mdstat"

Metrics

• mdstat metric
  • tags:
    • ActivityState (active or inactive)
    • Devices (comma separated list of devices that make up the array)
    • Name (name of the array)
  • fields:
    • BlocksSynced (if the array is rebuilding/checking, this is the count of blocks that have been scanned)
    • BlocksSyncedFinishTime (the expected finish time of the rebuild scan, listed in minutes remaining)
    • BlocksSyncedPct (the percentage of the rebuild scan left)
    • BlocksSyncedSpeed (the current speed the rebuild is running at, listed in K/sec)
    • BlocksTotal (the total count of blocks in the array)
    • DisksActive (the number of disks that are currently considered healthy in the array)
    • DisksFailed (the current count of failed disks in the array)
    • DisksSpare (the current count of "spare" disks in the array)
    • DisksTotal (total count of disks in the array)

Example Output

mdstat,ActivityState=active,Devices=sdm1\,sdn1,Name=md1 BlocksSynced=231299072i,BlocksSyncedFinishTime=0,BlocksSyncedPct=0,BlocksSyncedSpeed=0,BlocksTotal=231299072i,DisksActive=2i,DisksFailed=0i,DisksSpare=0i,DisksTotal=2i,DisksDown=0i 1617814276000000000
mdstat,ActivityState=active,Devices=sdm5\,sdn5,Name=md2 BlocksSynced=2996224i,BlocksSyncedFinishTime=0,BlocksSyncedPct=0,BlocksSyncedSpeed=0,BlocksTotal=2996224i,DisksActive=2i,DisksFailed=0i,DisksSpare=0i,DisksTotal=2i,DisksDown=0i 1617814276000000000