[satwell]

Parses zpool status -p to get data for these new gauge metrics:

• zfs_zpool_vdev_errors provides read, write, and checksum errors per vdev.
• zfs_zpool_data_errors provides a count of persistent data errors per pool.

Example output from zpool status -p on OpenZFS 2.3.9:

  pool: data
 state: ONLINE
status: One or more devices has experienced an error resulting in data
        corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
        entire pool from backup.
   see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-8A
  scan: scrub repaired 128K in 09:30:07 with 0 errors on Sun Oct  4 09:30:18 2026
config:

        NAME                                      STATE     READ WRITE CKSUM
        data                                      ONLINE       0     0     0
          mirror-0                                ONLINE       0     0     0
            df0dcbff-d596-4bfa-8a51-1306c3fed300  ONLINE       0     0     0
            fa09ff7a-6a6b-44f8-8e19-c1979b05415e  ONLINE       0     0     0

errors: 1 data errors, use '-v' for a list

  pool: ssd
 state: ONLINE
  scan: scrub repaired 0B in 00:00:23 with 0 errors on Sun Oct 11 00:00:27 2026
config:

        NAME                                    STATE     READ WRITE CKSUM
        ssd                                     ONLINE       0     0     0
          462990f2-1505-45fa-b505-3ca7bcae611b  ONLINE       0     0     0

errors: No known data errors