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.

Introduced in: Telegraf v1.20.0 Tags: system OS support: linux

Global configuration options

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