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Merge pull request #39 from opinkerfi/plugin_check_yum_update

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Updated check_yum to 0.8.9
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Garðar Þorsteinsson 2019-10-23 15:45:05 +00:00 committed by GitHub
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1 changed files with 273 additions and 274 deletions
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@ -1,24 +1,29 @@
#!/usr/bin/python
# coding=utf-8
#!/usr/bin/env python
#
# Author: Hari Sekhon
# Date: 2008-04-29 17:21:08 +0100 (Tue, 29 Apr 2008)
#
# https://github.com/harisekhon/nagios-plugins
#
# License: see accompanying LICENSE file
#
"""Nagios plugin to check the YUM package management system for package updates.
Can optionally alert on any available updates as well as just
security related updates"""
"""
Nagios plugin to test for Yum updates on RedHat / CentOS Linux.
__title__ = "check_yum"
__version__ = "0.8.0"
Can optionally alert on any available updates as well as just security related updates
# Standard Nagios return codes
OK = 0
WARNING = 1
CRITICAL = 2
UNKNOWN = 3
See also: check_yum.pl (also part of the Advanced Nagios Plugins Collection)
Tested on CentOS 5 / 6 / 7
"""
import os
import re
import sys
import signal
OLD_PYTHON = False
# pylint: disable=wrong-import-position
try:
from subprocess import Popen, PIPE, STDOUT
except ImportError:
@ -26,28 +31,41 @@ except ImportError:
import commands
from optparse import OptionParser
__author__ = "Hari Sekhon"
__title__ = "Nagios Plugin for Yum updates on RedHat/CentOS systems"
__version__ = "0.8.9"
# Standard Nagios return codes
OK = 0
WARNING = 1
CRITICAL = 2
UNKNOWN = 3
DEFAULT_TIMEOUT = 30
support_msg = "Please make sure you have upgraded to the latest version from " + \
"https://github.com/harisekhon/nagios-plugins. If the problem persists, " + \
"please raise a ticket at https://github.com/harisekhon/nagios-plugins/issues "+ \
"with the full -vvv output"
def end(status, message, perfdata=''):
def end(status, message):
"""Exits the plugin with first arg as the return code and the second
arg as the message to output"""
check = "YUM "
if status == OK:
print "%sOK: %s | %s" % (check, message, perfdata)
print "%sOK: %s" % (check, message)
sys.exit(OK)
elif status == WARNING:
print "%sWARNING: %s | %s" % (check, message, perfdata)
print "%sWARNING: %s" % (check, message)
sys.exit(WARNING)
elif status == CRITICAL:
print "%sCRITICAL: %s | %s" % (check, message, perfdata)
print "%sCRITICAL: %s" % (check, message)
sys.exit(CRITICAL)
else:
print "UNKNOWN: %s" % message
sys.exit(UNKNOWN)
YUM = "/usr/bin/yum"
def check_yum_usable():
@ -62,26 +80,28 @@ def check_yum_usable():
end(UNKNOWN, "%s is not executable" % YUM)
class YumTester:
class YumTester(object):
"""Class to hold all portage test functions and state"""
def __init__(self):
"""Initialize all object variables"""
self.all_updates = False
self.no_cache_update = False
self.no_warn_on_lock = False
self.enable_repo = ""
self.disable_repo = ""
self.timeout = DEFAULT_TIMEOUT
self.verbosity = 0
self.all_updates = False
self.no_cache_update = False
self.no_warn_on_lock = False
self.enable_repo = ""
self.disable_repo = ""
self.disable_plugin = ""
self.yum_config = ""
self.timeout = DEFAULT_TIMEOUT
self.verbosity = 0
self.warn_on_any_update = False
def validate_all_variables(self):
"""Validates all object variables to make sure the
environment is sane"""
if self.timeout == None:
if self.timeout is None:
self.timeout = DEFAULT_TIMEOUT
try:
self.timeout = int(self.timeout)
@ -92,7 +112,7 @@ class YumTester:
if self.timeout < 1 or self.timeout > 3600:
end(UNKNOWN, "Timeout must be a number between 1 and 3600 seconds")
if self.verbosity == None:
if self.verbosity is None:
self.verbosity = 0
try:
self.verbosity = int(self.verbosity)
@ -107,7 +127,7 @@ class YumTester:
"""runs a system command and returns
an array of lines of the output"""
if cmd == "" or cmd == None:
if not cmd:
end(UNKNOWN, "Internal python error - " \
+ "no cmd supplied for run function")
@ -121,20 +141,29 @@ class YumTester:
for repo in self.disable_repo.split(","):
cmd += " --disablerepo=%s" % repo
if self.disable_plugin:
# --disableplugin can take a comma separated list directly
#for plugin in self.disable_plugin.split(","):
#cmd += " --disableplugin=%s" % plugin
cmd += " --disableplugin=%s" % self.disable_plugin
if self.yum_config:
for repo in self.yum_config.split(","):
cmd += " --config=%s" % repo
self.vprint(3, "running command: %s" % cmd)
if OLD_PYTHON:
self.vprint(3, "subprocess not available, probably old python " \
+ "version, using shell instead")
os.environ['LANG'] = "en_US"
returncode, stdout = commands.getstatusoutput(cmd)
if returncode >= 256:
returncode = returncode / 256
else:
try:
process = Popen( cmd.split(),
stdin=PIPE,
stdout=PIPE,
stderr=STDOUT )
env = {'LANG': 'en_US'}
process = Popen(cmd.split(), stdin=PIPE, stdout=PIPE, stderr=STDOUT, env=env)
except OSError, error:
error = str(error)
if error == "No such file or directory":
@ -143,10 +172,12 @@ class YumTester:
% (cmd.split()[0], error))
output = process.communicate()
# for using debug outputs, either do not comment above line or explicitly set exit code below
#output = [open(os.path.dirname(__file__) + '/test_input.txt').read(), '']
returncode = process.returncode
stdout = output[0]
if stdout == None or stdout == "":
if not stdout:
end(UNKNOWN, "No output from utility '%s'" % cmd.split()[0])
self.vprint(3, "Returncode: '%s'\nOutput: '%s'" \
@ -159,18 +190,20 @@ class YumTester:
def check_returncode(self, returncode, output):
"""Takes the returncode and output (as an array of lines)
of the YUM program execution and tests for failures, exits
of the yum program execution and tests for failures, exits
with an appropriate message if any are found"""
if returncode == 0:
pass
for line in output:
if "You must run this command as root" in line:
end(UNKNOWN, "You must run this plugin as root")
elif returncode == 100:
# Updates Available
pass
elif returncode == 200:
if "lock" in output[-2] or "another copy is running" in output[-2]:
msg = "Cannot check for updates, " \
+ "another instance of YUM is running"
+ "another instance of yum is running"
if self.no_warn_on_lock:
end(OK, msg)
else:
@ -179,10 +212,15 @@ class YumTester:
output = self.strip_output(output)
end(UNKNOWN, "%s" % output)
else:
if not 'Loading "security" plugin' in output \
if 'No more mirrors to try' in output:
end(UNKNOWN, 'connectivity issue to repos: \'No more mirrors to try\'. ' + \
'You could also try running --cache-only and ' + \
'scheduling a separate \'yum makecache\' via cron or similar')
elif (not ('Loading "security" plugin' in output or 'Loaded plugins:.*security' in output)) \
or "Command line error: no such option: --security" in output:
end(UNKNOWN, "Security plugin for YUM is required. Try to " \
+ "'yum install yum-security' and then re-run " \
end(UNKNOWN, "Security plugin for yum is required. Try to " \
+ "'yum install yum-security' (RHEL5) or " \
+ "'yum install yum-plugin-security' (RHEL6) and then re-run " \
+ "this plugin. Alternatively, to just alert on " \
+ "any update which does not require the security " \
+ "plugin, try --all-updates")
@ -252,25 +290,27 @@ class YumTester:
output = self.run(cmd)
output2 = "\n".join(output).split("\n\n")
if self.verbosity >= 4 :
output2 = [_ for _ in "\n".join(output).split("\n\n") if _]
if self.verbosity >= 4:
for section in output2:
print "\nSection:\n%s\n" % section
if len(output2) > 2 or \
not ( "Setting up repositories" in output2[0] or \
"Loaded plugins: " in output2[0] or \
re.search('Loading\s+".+"\s+plugin', output2[0]) ):
not ("Setting up repositories" in output2[0] or \
"Loaded plugins: " in output2[0] or \
re.search(r'Loading\s+".+"\s+plugin', output2[0])):
end(WARNING, "Yum output signature does not match current known " \
+ "format. Please make sure you have upgraded to the " \
+ "latest version of this plugin. If the problem " \
+ "persists, please contact the author for a fix")
+ "format. " + support_msg)
number_packages = 0
if len(output2) == 1:
# There are no updates but we have passed
# the loading and setting up of repositories
number_packages = 0
pass
else:
number_packages = len([x for x in output2[1].split("\n") \
if len(x.split()) > 1 ])
for line in output2[1].split("\n"):
if len(line.split()) > 1 and \
line[0:1] != " " and \
"Obsoleting Packages" not in line:
number_packages += 1
try:
number_packages = int(number_packages)
@ -278,54 +318,44 @@ class YumTester:
raise ValueError
except ValueError:
end(UNKNOWN, "Error parsing package information, invalid package " \
+ "number, YUM output may have changed. Please make " \
+ "sure you have upgraded to the latest version of " \
+ "this plugin. If the problem persists, then please " \
+ "contact the author for a fix")
+ "number, yum output may have changed. " + support_msg)
# Extra layer of checks. This is a security plugin so it's preferable
# to fail on error rather than pass silently leaving you with an
# insecure system
count = 0
re_kernel_security_update = re.compile('^Security: kernel-.+ is an installed security update')
re_kernel_update = re.compile('^Security: kernel-.+ is the currently running version')
re_package_format = \
re.compile("^.+\.(i[3456]86|x86_64|noarch)\s+.+\s+.+$")
# This is to work around a YUM truncation issue effectively changing
re.compile(r'^.+\.(i[3456]86|x86_64|noarch)\s+.+\s+.+$')
# This is to work around a yum truncation issue effectively changing
# the package output format. Currently only very long kmod lines
# are seen to have caused this so we stick to what we know for safety
# and raise an unknown error on anything else for maximum security
#re_package_format_truncated = \
# re.compile("^[\w-]+-kmod-\d[\d\.-]+.*\s+.+\s+.+$")
obsoleting_packages = False
for line in output:
if ' excluded ' in line:
continue
elif obsoleting_packages and line[0:1] == " ":
continue
elif "Obsoleting Packages" in line:
obsoleting_packages = True
continue
elif re_kernel_security_update.match(line):
end(WARNING, 'Kernel security update is installed but requires a reboot')
elif re_kernel_update.match(line):
continue
if re_package_format.match(line):
count += 1
if count != number_packages:
end(UNKNOWN, "Error parsing package information, inconsistent " \
+ "package count, yum output may have changed. Please " \
+ "make sure you have upgraded to the latest version " \
+ "of this plugin. If the problem persists, then " \
+ "please contact the author for a fix")
+ "package count (%d count vs %s num packages)" % (count, number_packages) \
+ ", yum output may have changed. " + support_msg)
return number_packages, "'updates'=%s" % (number_packages)
return number_packages
def get_security_updateinfo(self):
"""Fetches errata numbers and package names"""
cmd = "%s list-security" % YUM
output = self.run(cmd)
errata = []
for line in output:
try:
if line.split()[1] != "security" and line.split()[1][-4:] != "Sec.":
continue
except:
continue
(advisoryid, etype, package) = line.split()
errata.append( { "name": package, "advisory": advisoryid } )
return errata
def get_security_updates(self):
"""Gets all updates, but differentiates between
@ -336,56 +366,52 @@ class YumTester:
output = self.run(cmd)
re_security_summary_rhel5 = re.compile("Needed \d+ of \d+ packages, for security")
re_security_summary_rhel6 = re.compile("\d+ package\(s\) needed for security, out of \d+ available")
re_no_security_updates_available_rhel5 = re.compile("No packages needed, for security, \d+ available")
re_no_security_updates_available_rhel6 = re.compile("No packages needed for security; \d+ packages available")
re_security_summary = \
re.compile(r'Needed (\d+) of (\d+) packages, for security')
re_summary_rhel6 = re.compile(r'(\d+) package\(s\) needed for security, out of (\d+) available')
re_no_sec_updates = \
re.compile(r'No packages needed,? for security[;,] (\d+) (?:packages )?available')
re_kernel_update = re.compile(r'^Security: kernel-.+ is an installed security update')
summary_line_found = False
for line in output:
if re_no_security_updates_available_rhel5.match(line):
_ = re_summary_rhel6.match(line)
if _:
summary_line_found = True
number_security_updates = _.group(1)
number_total_updates = _.group(2)
break
_ = re_no_sec_updates.match(line)
if _:
summary_line_found = True
number_security_updates = 0
number_total_updates = line.split()[5]
number_total_updates = _.group(1)
break
if re_no_security_updates_available_rhel6.match(line):
_ = re_security_summary.match(line)
if _:
summary_line_found = True
number_security_updates = 0
number_total_updates = line.split()[5]
break
if re_security_summary_rhel5.match(line):
summary_line_found = True
number_security_updates = line.split()[1]
number_total_updates = line.split()[3]
break
if re_security_summary_rhel6.match(line):
summary_line_found = True
number_security_updates = line.split()[0]
number_total_updates = line.split()[7]
number_security_updates = _.group(1)
number_total_updates = _.group(2)
break
_ = re_kernel_update.match(line)
if _:
end(CRITICAL, "Kernel security update is installed but requires a reboot")
if not summary_line_found:
end(WARNING, "Cannot find summary line in YUM output. Please " \
+ "make sure you have upgraded to the latest version " \
+ "of this plugin. If the problem persists, please " \
+ "contact the author for a fix")
end(WARNING, "Cannot find summary line in yum output. " + support_msg)
try:
number_security_updates = int(number_security_updates)
number_total_updates = int(number_total_updates)
except ValueError:
end(WARNING, "Error parsing package information, YUM output " \
+ "may have changed. Please make sure you have " \
+ "upgraded to the latest version of this plugin. " \
+ "If the problem persists, the please contact the " \
+ "author for a fix")
end(WARNING, "Error parsing package information, yum output " \
+ "may have changed. " + support_msg)
number_other_updates = number_total_updates - number_security_updates
if len(output) > number_total_updates + 25:
from_excluded_regex = re.compile(' from .+ excluded ')
if len([_ for _ in output if not from_excluded_regex.search(_)]) > number_total_updates + 25:
end(WARNING, "Yum output signature is larger than current known " \
+ "format, please make sure you have upgraded to the " \
+ "latest version of this plugin. If the problem " \
+ "persists, please contact the author for a fix")
+ "format. " + support_msg)
return number_security_updates, number_other_updates
@ -394,26 +420,25 @@ class YumTester:
"""Starts tests and controls logic flow"""
check_yum_usable()
self.vprint(3, "%s - Version %s\n" \
% (__title__, __version__))
self.vprint(3, "%s - Version %s\nAuthor: %s\n" \
% (__title__, __version__, __author__))
self.validate_all_variables()
self.set_timeout()
if self.all_updates:
return self.test_all_updates()
else:
return self.test_security_updates()
return self.test_security_updates()
def test_all_updates(self):
"""Tests for all updates, and returns a tuple
of the status code and output"""
status = UNKNOWN
message = "code error - please contact author for a fix"
status = UNKNOWN
message = "code error. " + support_msg
number_updates, perfdata = self.get_all_updates()
number_updates = self.get_all_updates()
if number_updates == 0:
status = OK
message = "0 Updates Available"
@ -424,20 +449,20 @@ class YumTester:
else:
message = "%s Updates Available" % number_updates
return status, message, perfdata
message += " | total_updates_available=%s" % number_updates
return status, message
def test_security_updates(self):
"""Tests for security updates and returns a tuple
of the status code and output"""
status = UNKNOWN
message = "code error - please contact author for a fix"
status = UNKNOWN
message = "code error. " + support_msg
number_security_updates, number_other_updates = \
self.get_security_updates()
perfdata = "'security_updates'=%s 'other_updates'=%s" % (number_security_updates, number_other_updates)
if number_security_updates == 0:
status = OK
message = "0 Security Updates Available"
@ -448,6 +473,7 @@ class YumTester:
elif number_security_updates > 1:
message = "%s Security Updates Available" \
% number_security_updates
if number_other_updates != 0:
if self.warn_on_any_update and status != CRITICAL:
status = WARNING
@ -456,13 +482,10 @@ class YumTester:
else:
message += ". %s Non-Security Updates Available" \
% number_other_updates
message += " | security_updates_available=%s non_security_updates_available=%s total_updates_available=%s" \
% (number_security_updates, number_other_updates, number_security_updates + number_other_updates)
if number_security_updates and self.long_output:
errata = self.get_security_updateinfo()
for e in errata:
message += "\n%s - %s" % (e['advisory'], e['name'])
return status, message, perfdata
return status, message
def vprint(self, threshold, message):
@ -479,88 +502,97 @@ def main():
tester = YumTester()
parser = OptionParser()
parser.add_option( "--all-updates",
action="store_true",
dest="all_updates",
help="Does not distinguish between security and " \
+ "non-security updates, but returns critical for " \
+ "any available update. This may be used if the " \
+ "YUM security plugin is absent or you want to " \
+ "maintain every single package at the latest " \
+ "version. You may want to use " \
+ "--warn-on-any-update instead of this option")
parser.add_option("-A",
"--all-updates",
action="store_true",
dest="all_updates",
help="Does not distinguish between security and " \
+ "non-security updates, but returns critical for " \
+ "any available update. This may be used if the " \
+ "yum security plugin is absent or you want to " \
+ "maintain every single package at the latest " \
+ "version. You may want to use " \
+ "--warn-on-any-update instead of this option")
parser.add_option( "--warn-on-any-update",
action="store_true",
dest="warn_on_any_update",
help="Warns if there are any (non-security) package " \
+ "updates available. By default only warns when " \
+ "security related updates are available. If " \
+ "--all-updates is used, then this option is " \
+ "redundant as --all-updates will return a " \
+ "critical result on any available update, " \
+ "whereas using this switch still allows you to " \
+ "differentiate between the severity of updates ")
parser.add_option("-W",
"--warn-on-any-update",
action="store_true",
dest="warn_on_any_update",
help="Warns if there are any (non-security) package " \
+ "updates available. By default only warns when " \
+ "security related updates are available. If " \
+ "--all-updates is used, then this option is " \
+ "redundant as --all-updates will return a " \
+ "critical result on any available update, " \
+ "whereas using this switch still allows you to " \
+ "differentiate between the severity of updates ")
parser.add_option( "-C",
"--cache-only",
action="store_true",
dest="no_cache_update",
help="Run entirely from cache and do not update the " \
+ "cache when running YUM. Useful if you have " \
+ "'yum makecache' cronned so that the nagios " \
+ "check itself doesn't have to do it, possibly " \
+ "speeding up execution (by 1-2 seconds in tests)")
parser.add_option("-C",
"--cache-only",
action="store_true",
dest="no_cache_update",
help="Run entirely from cache and do not update the " \
+ "cache when running yum. Useful if you have " \
+ "'yum makecache' cronned so that the nagios " \
+ "check itself doesn't have to do it, possibly " \
+ "speeding up execution (by 1-2 seconds in tests)")
parser.add_option( "--no-warn-on-lock",
action="store_true",
dest="no_warn_on_lock",
help="Return OK instead of WARNING when YUM is locked " \
+ "and fails to check for updates due to another " \
+ "instance running. This is not recommended from " \
+ "the security standpoint, but may be wanted to " \
+ "reduce the number of alerts that may " \
+ "intermittently pop up when someone is running " \
+ "YUM interactively for package management")
parser.add_option("-c",
"--config",
dest="yum_config",
help="Run with custom repository config in order to use " \
+ "custom repositories in case of special setup for")
parser.add_option( "--enablerepo",
dest="repository_to_enable",
help="Explicitly enables a reposity when calling YUM. "
+ "Can take a comma separated list of repositories")
parser.add_option("-N",
"--no-warn-on-lock",
action="store_true",
dest="no_warn_on_lock",
help="Return OK instead of WARNING when yum is locked " \
+ "and fails to check for updates due to another " \
+ "instance running. This is not recommended from " \
+ "the security standpoint, but may be wanted to " \
+ "reduce the number of alerts that may " \
+ "intermittently pop up when someone is running " \
+ "yum for package management")
parser.add_option( "--disablerepo",
dest="repository_to_disable",
help="Explicitly disables a repository when calling YUM "
+ "Can take a comma separated list of repositories")
parser.add_option("-e",
"--enablerepo",
dest="repository_to_enable",
help="Explicitly enables a reposity when calling yum. " +
"Can take a comma separated list of repositories")
parser.add_option( "-l",
"--long-output",
action="store_true",
dest="long_output",
help="Shows more detailed output including the errata "
+ "ID.")
parser.add_option("-d",
"--disablerepo",
dest="repository_to_disable",
help="Explicitly disables a repository when calling yum. " \
+ "Can take a comma separated list of repositories")
parser.add_option( "-t",
"--timeout",
dest="timeout",
help="Sets a timeout in seconds after which the " \
+"plugin will exit (defaults to %s seconds). " \
parser.add_option("--disableplugin",
dest="plugin_to_disable",
help="Explicitly disables a plugin when calling yum. " \
+ "Can take a comma separated list of plugins")
parser.add_option("-t",
"--timeout",
dest="timeout",
help="Sets a timeout in seconds after which the " \
+"plugin will exit (defaults to %s seconds). " \
% DEFAULT_TIMEOUT)
parser.add_option( "-v",
"--verbose",
action="count",
dest="verbosity",
help="Verbose mode. Can be used multiple times to " \
+ "increase output. Use -vvv for debugging output. " \
+ "By default only one result line is printed as " \
+ "per Nagios standards")
parser.add_option("-v",
"--verbose",
action="count",
dest="verbosity",
help="Verbose mode. Can be used multiple times to " \
+ "increase output. Use -vvv for debugging output. " \
+ "By default only one result line is printed as " \
+ "per Nagios standards")
parser.add_option( "-V",
"--version",
action="store_true",
dest="version",
help="Print version number and exit")
parser.add_option("-V",
"--version",
action="store_true",
dest="version",
help="Print version number and exit")
(options, args) = parser.parse_args()
@ -568,23 +600,24 @@ def main():
parser.print_help()
sys.exit(UNKNOWN)
tester.all_updates = options.all_updates
tester.no_cache_update = options.no_cache_update
tester.no_warn_on_lock = options.no_warn_on_lock
tester.enable_repo = options.repository_to_enable
tester.disable_repo = options.repository_to_disable
tester.timeout = options.timeout
tester.verbosity = options.verbosity
tester.warn_on_any_update = options.warn_on_any_update
tester.long_output = options.long_output
tester.all_updates = options.all_updates
tester.no_cache_update = options.no_cache_update
tester.no_warn_on_lock = options.no_warn_on_lock
tester.enable_repo = options.repository_to_enable
tester.disable_repo = options.repository_to_disable
tester.disable_plugin = options.plugin_to_disable
tester.yum_config = options.yum_config
tester.timeout = options.timeout
tester.verbosity = options.verbosity
tester.warn_on_any_update = options.warn_on_any_update
if options.version:
print "%s - Version %s\n" \
% (__title__, __version__)
print "%s - Version %s\nAuthor: %s\n" \
% (__title__, __version__, __author__)
sys.exit(OK)
result, output, perfdata = tester.test_yum_updates()
end(result, output, perfdata)
result, output = tester.test_yum_updates()
end(result, output)
if __name__ == "__main__":
@ -593,37 +626,3 @@ if __name__ == "__main__":
except KeyboardInterrupt:
print "Caught Control-C..."
sys.exit(CRITICAL)
#Copyright © ?–?, Hari Sekhon <harisekhon@gmail.com>.
#Copyright © 2012, Christoph Anton Mitterer <mail@christoph.anton.mitterer.name>.
#All rights reserved.
#
#
#This program is free software; you can redistribute it and/or
#modify it under the terms of the GNU General Public License
#as published by the Free Software Foundation; version 2
#of the License.
#
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#
#You should have received a copy of the GNU General Public License
#along with this program; if not, write to the Free Software
#Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.