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raid_check.py
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raid_check.py
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#!/usr/bin/python
# CloudKick Plugin to check the status of any
# and all RAID devices on a server. Looks for
# degraded/broken arrays.
#
# Supported/Tested Devices:
# 3ware 7506
#
# Contribs welcome! If you have a RAID device you want supported,
# feel free to add support or email me and I'll be glad to add support.
# I wrote this plugin a bit "overkill" specifically to be able to
# add support for other cards/vendors easily.
#
# Copyright (C) 2011 James Bair <james.d.bair@gmail.com>
#
# 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; either version 2
# of the License, or (at your option) any later version.
#
# 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.
import commands
import re
import sys
def systemCommand(command):
"""
Wrapper for executing a system command. Reports error to CloudKick
as well as to standard error.
"""
commStatus, commOut = commands.getstatusoutput(command)
# If our command fails, abort entirely and notify CloudKick
if commStatus != 0:
sys.stderr.write('Error: Failure when executing the following ')
sys.stderr.write("command: '%s'\n" % (command,))
sys.stderr.write("Exit status: %d\n" % (commStatus,))
sys.stderr.write("Output: %s\n\n" % (commOut,))
sys.stderr.write('status err System command failure: ')
sys.stderr.write('%s\n' % (command,))
sys.exit(1)
# If we get a 0 exit code, all is well. Return the data.
else:
return commOut
def ourRaidVendors():
"""
Find if the server has RAID at all.
If it does, return our types (lsi or 3ware).
"""
adapters = []
results = []
# Put spaces around vendors to avoid accidental detection.
vendors = (' 3ware ',)
# Pull our info from lspci
lspciData = systemCommand('lspci')
for line in lspciData.split('\n'):
if 'RAID' in line:
adapters.append(line)
# If we find no RAID, we are done.
if adapters == []:
return None
# Find out which vendors we have
# RAID with
for adapter in adapters:
for vendor in vendors:
# Don't want double vendor entries
if vendor in results:
continue
# Add our vendor in, without the spaces
if vendor in adapter:
results.append(vendor.strip())
# In case we find no vendors
if results == []:
return None
# Check if we have the ability to audit 3ware controllers
# This should exit cleanly if all is well. Run outside of systemCommand()
# so we can return a specific error message.
if '3ware' in results:
commStatus, commOut = commands.getstatusoutput('tw_cli show')
if commStatus != 0:
sys.stderr.write('status err Missing required ')
sys.stderr.write('3ware RAID utility "tw_cli".\n')
sys.exit(1)
return results
def get3wareControllers():
"""
Find all 3ware controllers on the system.
"""
# All 3ware controllers should be c0, c1, c2 etc.
#Ctl Model (V)Ports Drives Units NotOpt RRate VRate BBU
#------------------------------------------------------------------------
#c2 7506-4LP 4 4 1 0 2 - -
raidData = systemCommand('tw_cli show')
results = re.findall('(c[0-9*]) ', raidData)
return results
def get3wareStatus(controller):
"""
Check the status of all RAID arrays on the given controller.
"""
# Looking for the OK portion of this line:
#Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy
#------------------------------------------------------------------------------
#u0 RAID-5 OK - - 64K 569.766 W -
raidData = systemCommand('tw_cli /%s show' % (controller,))
results = re.findall('u[0-9]\s*RAID-[0-9]*\s*(\w*)', raidData)
return results
def main():
"""
Main function for raid_check.py
"""
# Supported vendors - would love to extend this!
supportedVendors = ('3ware',)
# See if we have any RAID at all
vendors = ourRaidVendors()
# Make sure we have what we need
if vendors is None:
sys.stdout.write('status warn No RAID devices found on this system.\n')
sys.exit(0)
# If we have RAID, let's see if everything is okay
else:
# Validate it's supported
for vendor in vendors:
if vendor not in supportedVendors:
sys.stdout.write("status warn Unsupported RAID vendor ")
sys.stdout.write("'%s' found.\n" % (vendor,))
sys.exit(0)
# 3Ware support. Works with lists of controllers.
if vendor == '3ware':
controllers = get3wareControllers()
for controller in controllers:
# Find the statuses
statuses = get3wareStatus(controller)
for status in statuses:
if status == 'OK':
# We print an all good if no exceptions are caught
# on any arrays on any controllers.
continue
else:
sys.stdout.write('status warn ')
sys.stdout.write("Failed status ")
sys.stdout.write("%s found on " % (status,))
sys.stdout.write("controller %s\n" % (controller,))
sys.exit(0)
# If we are here, it's listed as supported in main(),
# but no logic is in place.
else:
sys.stderr.write("status err Supported vendor ")
sys.stderr.write("'%s' missing support.\n" % (vendor,))
sys.exit(1)
# If all of our controllers and RAID arrays pass without fail
# we are good to go!
contNum = len(controllers)
if contNum == 1:
contStr = 'controller'
else:
contStr = 'controllers'
sys.stdout.write('status ok ')
sys.stdout.write('Checked %d %s: ' % (contNum, contStr))
sys.stdout.write(', '.join(controllers))
sys.stdout.write('\n')
sys.exit(0)
if __name__ == '__main__':
main()