112 lines
2.7 KiB
Python
112 lines
2.7 KiB
Python
#!/usr/bin/env python
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"""
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Monitor a mount on the filesystem and all of it sub mounts
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"""
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from optparse import OptionParser
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import subprocess
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import os.path
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def parse_args():
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parser = OptionParser()
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parser.add_option('-p', '--path', dest='path', type='string', help='absolute path to check', metavar="FILE")
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parser.add_option('-w', '--warning', dest='warning', type='int', help='free disk space critical threshold (in %)')
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parser.add_option('-c', '--critical', dest='critical', type='int', help='free disk space warning threshold (in %)')
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(opts, args) = parser.parse_args()
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if opts.path is None:
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print 'UNKNOWN: -p'
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parser.print_help()
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exit(3)
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if opts.warning is None or opts.critical is None:
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print 'UNKNOWN: missing -w and/or -c'
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parser.print_help()
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exit(3)
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if opts.warning < opts.critical:
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print 'UNKNOWN: -c can not be greater than -w'
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parser.print_help()
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exit(3)
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if opts.path.endswith('/') and opts.path != '/':
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opts.path = opts.path[:-1]
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if not os.path.exists(opts.path):
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print 'UNKNOWN: -p "{0}" must be a valid path'.format(opts.path)
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parser.print_help()
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exit(3)
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return opts
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def get_mount_point(loc):
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'''
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Get the mount point of the path
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'''
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mount = os.path.realpath(os.path.abspath(loc))
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while not os.path.ismount(mount):
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mount = os.path.dirname(mount)
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return mount
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def get_df(mount):
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'''
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return a dict of {mount : free space in %}
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- sub mounts of `mount`
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- if mount is not a mount point return it's parent mount point as well
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'''
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res = {}
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real_path = get_mount_point(mount)
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proc = subprocess.Popen(
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'df -P',
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shell=True,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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stdin=None
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)
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df = proc.communicate()[0].splitlines()
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df.pop(0)
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for line in df:
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data = line.split()
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path = data[-1]
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if mount in path or path == real_path:
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res.update({
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path: 100-int(data[-2].replace('%', ''))
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})
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return res
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xcode = 0
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opts = parse_args()
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df = get_df(opts.path)
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errors = []
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for mount, disk_free in df.items():
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if opts.warning >= disk_free > opts.critical:
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if xcode < 1:
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xcode = 1
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errors.append(mount)
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elif disk_free < opts.critical:
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if xcode < 2:
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xcode = 2
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errors.append(mount)
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if xcode == 0:
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msg = 'OK: All mounts are ok'
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else:
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if xcode == 1:
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err = 'WARN'
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else:
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err = 'CRIT'
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msg = '{0}: the mount {1} does not have enough disk space'.format(
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err, ','.join(errors)
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)
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print msg
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exit(xcode)
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