Check_MK: Use API on Check_MK 2.x to trigger tabula rasa for hosts

Table of Contents

Sometimes if you must reinventory a huge amount of devices in Check_MK 2.x bulk inventory is not very responsive and could lead to hung up the system. With this little helper you can provide a text list of hostnames and he do an “tabula rasa” for each host one by one.

Host list hosts.txt
#

hostA
hostB
hostC

Python script to Check_MK 2.x API
#

#!/usr/bin/env python

import requests
import pprint
import sys
import urllib3
urllib3.disable_warnings()

USERNAME = "username"
PASSWORD = "password"
HOST_NAME = "server"
SITE_NAME = "site"
API_URL = f"https://{HOST_NAME}/{SITE_NAME}/check_mk/api/1.0"

########################################################################################################################

def doit(host):

    HEADERS = {
        "Authorization": f"Bearer {USERNAME} {PASSWORD}",
        "Accept": "application/json",
        "Content-Type": "application/json"
    }

    session = requests.session()
    session.headers['Authorization'] = f"Bearer {USERNAME} {PASSWORD}"
    session.headers['Accept'] = 'application/json'

    resp = session.post(
        f"{API_URL}/domain-types/service_discovery_run/actions/start/invoke", verify=False, headers=HEADERS,
        json={"host_name": host, "mode": "fix_all"}
    )

    if resp.status_code == 200:
        #pprint.pprint(resp.json())
        print(f"##### {host} DONE")
    else:
        raise RuntimeError(pprint.pformat(resp.json()))

if __name__ == '__main__':
	with open(sys.argv[1], "r") as f:
		for line in f.readlines():
			host = line.strip()
			try:
				doit(host)
			except:
				print("Error")