Python script that emits disks and mdadm raid devices in a form usable by Zabbix low-level discovery

zbx_devices.py

#!/usr/bin/python

import json
import subprocess


blockdev_fullpath_macro = "{#BLOCKDEV_FULLPATH}"
blockdev_type_macro = "{#BLOCKDEV_TYPE}"
blockdev_shortname_macro = "{#BLOCKDEV_SHORTNAME}"

output = subprocess.Popen("lsblk -r -io KNAME,TYPE", stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True )
result = []
dedupe = {}
device_types = ['disk','raid0','raid5']
for line in output.stdout:
	(dev_name, dev_type) = line.rstrip().split()
	if any( dt in dev_type for dt in device_types):
		dedupe[dev_name] = dev_type

for dev_name in dedupe:
	dev_type = dedupe[dev_name]
	dev_fullpath = '\/dev\/' + dev_name
	row = { blockdev_shortname_macro: dev_name, blockdev_type_macro: dev_type , blockdev_fullpath_macro: dev_fullpath }
	result.append(row)
data_arr = {"data": result }

print json.dumps(data_arr, indent=2)

See here for more information: https://www.zabbix.com/documentation/2.4/manual/discovery/low_level_discovery

# python blockdevices.py
{
  "data": [
    {
      "{#BLOCKDEV_FULLPATH}": "\\/dev\\/sdm",
      "{#BLOCKDEV_TYPE}": "disk",
      "{#BLOCKDEV_SHORTNAME}": "sdm"
    },
    {
      "{#BLOCKDEV_FULLPATH}": "\\/dev\\/md0",
      "{#BLOCKDEV_TYPE}": "raid0",
      "{#BLOCKDEV_SHORTNAME}": "md0"
    },
    {
      "{#BLOCKDEV_FULLPATH}": "\\/dev\\/sdo",
      "{#BLOCKDEV_TYPE}": "disk",
      "{#BLOCKDEV_SHORTNAME}": "sdo"
    }
  ]
}