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check_docker_swarm_node_active.py
executable file
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check_docker_swarm_node_active.py
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#!/usr/bin/env python3
# coding=utf-8
# vim:ts=4:sts=4:sw=4:et
#
# Author: Hari Sekhon
# Date: 2018-03-05 19:10:02 +0000 (Mon, 05 Mar 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 node state of a Docker Swarm node via the Docker API
Supports TLS with similar options to official 'docker' command
Tested on Docker 18.02
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import logging
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.utils import log, jsonpp, CriticalError
from harisekhon import DockerNagiosPlugin
except ImportError:
print(traceback.format_exc(), end='')
sys.exit(4)
__author__ = 'Hari Sekhon'
__version__ = '0.1'
# pylint: disable=too-few-public-methods
class CheckDockerSwarmNodeActive(DockerNagiosPlugin):
def __init__(self):
# Python 2.x
super(CheckDockerSwarmNodeActive, self).__init__()
# Python 3.x
# super().__init__()
self.msg = 'Docker msg not defined yet'
def check(self, client):
log.info('running Docker info')
info = client.info()
if log.isEnabledFor(logging.DEBUG):
log.debug(jsonpp(info))
swarm = info['Swarm']
if 'Cluster' not in swarm:
raise CriticalError('Docker is not a member of a Swarm')
state = swarm['LocalNodeState']
self.msg = 'Docker Swarm node state = {}'.format(state)
if state != 'active':
self.critical()
if __name__ == '__main__':
CheckDockerSwarmNodeActive().main()