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Raid (mdadm)

Prometheus node_exporter mdadm module dashboard. Per Server and per md view

Raid (mdadm) screenshot 1
Raid (mdadm) screenshot 2
Raid (mdadm) screenshot 3

Improved version of an existing board. See blow for details.
ATTENTION: This board needs a yet-as-of-now-to-be-merged version of node_exporter (see below)!

Changes to the board: (Original: https://grafana.com/grafana/dashboards/12768-victoria-mdadm/)

  • improved layout to see history of raid status
  • changed raid status to show as percentage
  • added disk status history graph
  • added sync time remaining
  • added sync rate
  • replaced deprecated angular graph with new time series graph

Changes to node_explorer: (PR: https://github.com/prometheus/node_exporter/pull/3007)
Added missing mdadm stats:

  • node_md_disks # added {state="down"}
  • node_md_sync_time_remaining (seconds)
  • node_md_blocks_synced_speed UPDATE: renamed to node_md_sync_time_remaining_seconds
  • node_md_blocks_synced_pct UPDATE: renamed to node_md_blocks_synced_percent

Notes:

  • One drive was not being shown, as it was in state="down" (recovering), which was not reported in the output.
  • Using node_md_blocks_synced / node_md_blocks as progress percentage created wrong results on my system, as the total-blocks differed from the total-to-be-synced-blocks. This may be due to the raid-level being used (raid5).
md0 : active raid5 sdf1[4] sde1[1] sdc1[2] sdb1[0]
      14650718208 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/3] [UUU_]
      [===================>.]  recovery = 99.9% (4882207424/4883572736) finish=7.8min speed=2908K/sec
      bitmap: 2/37 pages [8KB], 65536KB chunk
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