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nagios-plugins/check_rhcs/check_rhcs
Tomas Edwardsson 55daf8f4c9 Rework hostname detection to use local
Removed socket.gethostname to discover own hostname instead using the
local flag which is output from /usr/sbin/clustat -fx node definitions.
The gethostname does not always match the cluster node name which would
make the check fail.
2014-03-07 11:25:24 +00:00

173 lines
5.9 KiB
Python

#!/bin/env python
#
# Gather the cluster state and the current node state
#
# Output example:
#<clustat version="4.1.1">
# <cluster name="LabCluster" id="22068" generation="172"/>
# <quorum quorate="1" groupmember="1"/>
# <nodes>
# <node name="clusternode1.lab.inetu.net" state="1" local="0" \
# estranged="0" rgmanager="1" rgmanager_master="0" qdisk="0" nodeid="0x00000001"/>
# <node name="clusternode2.lab.inetu.net" state="1" local="1" \
# estranged="0" rgmanager="1" rgmanager_master="0" qdisk="0" nodeid="0x00000002"/>
# <node name="/dev/disk/by-id/scsi-36002219000b9642b000027124a3b61f1-part1" state="1" \
# local="0" estranged="0" rgmanager="0" rgmanager_master="0" qdisk="1" nodeid="0x00000000"/>
# </nodes>
# <groups>
# <group name="service:MySQL" state="112" state_str="started" flags="0" flags_str="" \
# owner="clusternode2.lab.inetu.net" last_owner="clusternode1.lab.inetu.net" restarts="0" \
# last_transition="1245765274" last_transition_str="Tue Jun 23 09:54:34 2009"/>
# </groups>
#</clustat>
#
# Frank Clements <frank @ sixthtoe.net>
import xml.dom.minidom
import os
import sys, socket
import getopt
def usage():
"""
Display usage information
"""
print """
Usage: """ + sys.argv[0] + """ ([-s serviceName] | [-c])
-c, --cluster
Gathers the overall cluster status for the local node
-s, --service
Gets the stats of the named service
-Z, --suspended
Checks whether there are any suspended services
-h, --help
Display this
"""
def getQuorumState(dom):
"""
Get the quorum state. This is a single inline element which only
has attributes and no children elements.
"""
quorumList = dom.getElementsByTagName('quorum')
quorumElement = quorumList[0]
return quorumElement.attributes['quorate'].value
def getClusterName(dom):
"""
Get the name of the cluster from the clustat output.
This assumes only a single cluster is running for the moment.
"""
clusterList = dom.getElementsByTagName('cluster')
clusterElement = clusterList[0]
return clusterElement.attributes['name'].value
def getLocalNodeState(dom):
"""
Get the state of the local node
"""
nodesList = dom.getElementsByTagName('node')
nodeState = {}
for node in nodesList:
if node.attributes['local'].value == "1":
nodeState['name'] = node.attributes['name'].value
nodeState['state'] = node.attributes['state'].value
nodeState['rgmanager'] = node.attributes['rgmanager'].value
elif node.attributes['qdisk'].value == "1":
if node.attributes['state'].value != "1":
print "CRITICAL: Quorum disk " + node.attributes['name'].value + " is unavailable!"
sys.exit(2)
return nodeState
def getServiceState(dom, service):
"""
Get the state of the named service
"""
groupList = dom.getElementsByTagName('group')
serviceState = {}
for group in groupList:
if group.attributes['name'].value in (service,"service:"+service,"vm:"+service):
serviceState['owner'] = group.attributes['owner'].value
serviceState['state'] = group.attributes['state_str'].value
serviceState['flags'] = group.attributes['flags_str'].value
return serviceState
def main():
try:
opts, args = getopt.getopt(sys.argv[1:], 's:cZh', ['service=', 'cluster', 'supsended', 'help'])
except getopt.GetoptError:
usage()
sys.exit(2)
check_suspend = False
for o, a in opts:
if o in ('-c', '--cluster'):
typeCheck = 'cluster'
if o in ('-s', '--service'):
typeCheck = 'service'
serviceName = a
if o in ('-Z', '--suspended'):
check_suspend = True
if o in ('-h', '--help'):
usage()
sys.exit()
try:
clustatOutput = os.popen('/usr/sbin/clustat -fx')
dom = xml.dom.minidom.parse(clustatOutput)
except Exception, e:
print "Error: could not parse output of : '/usr/sbin/clustat -fx': ", e
sys.exit(3)
if typeCheck == 'cluster':
# First we query for the state of the cluster itself.
# Should it be found tha the cluste ris not quorate we alert and exit immediately
cluster = getClusterName(dom)
qState = getQuorumState(dom)
# There are some serious problems if the cluster is inquorate so we simply alert immediately!
if qState != "1":
print "CRITICAL: Cluster " + cluster + " is inquorate!"
sys.exit(2)
# Now we find the status of the local node from clustat.
# We only care about the local state since this way we can tie the alert to the host.
nodeStates = getLocalNodeState(dom)
if nodeStates['state'] != "1":
print "WARNING: Local node state is offline!"
sys.exit(1)
elif nodeStates['rgmanager'] != "1":
print "CRITICAL: RGManager service not running on " + nodeStates['name'] + "!"
sys.exit(1)
else:
print "OK: Cluster node " + nodeStates['name'] + " is online and cluster is quorate."
sys.exit(0)
elif typeCheck == 'service':
serviceState = getServiceState(dom, serviceName)
if serviceState['state'] != 'started':
print "CRITICAL: Service " + serviceName + " on " + serviceState['owner'] + " is in " + serviceState['state'] + " state"
sys.exit(2)
elif check_suspend is True and serviceState['flags'] == 'frozen':
print "WARNING: Service " + serviceName + " on " + serviceState['owner'] + " is in " + serviceState['flags'] + " state"
sys.exit(1)
else:
print "OK: Service " + serviceName + " on " + serviceState['owner'] + " is in " + serviceState['state'] + " state"
sys.exit(0)
if __name__ == "__main__":
main()