telegraf/plugins/inputs/mdstat

mdstat Input Plugin

The mdstat 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 a better idea of what each field represents, see the mdstat man page.

Stat collection based on Prometheus' mdstat collection library.

Configuration

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

Metrics

• mdstat
  • 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)

Tags

• mdstat
  • ActivityState (active or inactive)
  • Devices (comma separated list of devices that make up the array)
  • Name (name of the array)

Example Output

$ telegraf --config ~/ws/telegraf.conf --input-filter mdstat --test
* Plugin: mdstat, Collection 1
> 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