check_prometheus_telegraf.py

#!/usr/bin/env python
#  coding=utf-8
#  vim:ts=4:sts=4:sw=4:et
#
#  Author: Hari Sekhon
#  Date: 2018-01-30 10:36:08 +0000 (Tue, 30 Jan 2018)
#
#  https://github.com/harisekhon/nagios-plugins
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn
#  and optionally send me feedback to help steer this or other code I publish
#
#  https://www.linkedin.com/in/harisekhon
#

"""

Nagios Plugin to check a Prometheus Telegraf scrape target is available

This should be targeted against Telegraf's prometheus output plugin

Tested on Telegraf 1.4, 1.5

"""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals

import os
import sys
import traceback
srcdir = os.path.abspath(os.path.dirname(__file__))
libdir = os.path.join(srcdir, 'pylib')
sys.path.append(libdir)
try:
    # pylint: disable=wrong-import-position
    from harisekhon import RestNagiosPlugin
except ImportError as _:
    print(traceback.format_exc(), end='')
    sys.exit(4)

__author__ = 'Hari Sekhon'
__version__ = '0.1'


# pylint: disable=too-few-public-methods
class CheckPrometheusTelegraf(RestNagiosPlugin):

    def __init__(self):
        # Python 2.x
        super(CheckPrometheusTelegraf, self).__init__()
        # Python 3.x
        # super().__init__()
        self.name = ['Prometheus Telefgraf', 'Telegraf']
        self.default_port = 9273
        self.path = '/metrics'
        self.auth = False
        self.json = False
        self.msg = self.name[0] + ' '

    def parse(self, req):
        if 'Telegraf collected metric' in req.content:
            self.ok()
            self.msg += 'endpoint online'
        else:
            self.critical()
            self.msg += 'endpoint not online'


if __name__ == '__main__':
    CheckPrometheusTelegraf().main()