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'''This module implements a Nagios configuration generator'''
import re, os, glob, socket, logging
import Bcfg2.Server.Plugin
LOGGER = logging.getLogger('Bcfg2.Plugins.NagiosGen')
class NagiosGen(Bcfg2.Server.Plugin.Plugin):
'''NagiosGen is a Bcfg2 plugin that dynamically generates
Nagios configuration file based on Bcfg2 data.'''
__name__ = 'NagiosGen'
__version__ = '0.6'
__author__ = 'bcfg-dev@mcs.anl.gov'
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
self.Entries = {'ConfigFile':
{'/etc/nagiosgen.status' : self.createhostconfig,
'/etc/nagios/nagiosgen.cfg': self.createserverconfig}}
self.client_attrib = {'encoding': 'ascii', 'owner':'root', \
'group':'root', 'perms':'0400'}
self.server_attrib = {'encoding': 'ascii', 'owner':'nagios', \
'group':'nagios', 'perms':'0440'}
def createhostconfig(self, entry, metadata):
'''Build host specific configuration file'''
host_address = socket.gethostbyname(metadata.hostname)
host_groups = filter(lambda x: os.path.isfile('%s/%s-group.cfg' % \
(self.data, x)), metadata.groups)
host_config = \
'define host{\n\
use default\n\
host_name %s\n\
alias %s\n\
address %s\n' % \
(metadata.hostname, metadata.hostname, host_address )
if host_groups:
host_config += ' hostgroups %s\n' % (",".join(host_groups))
host_config += ' }\n'
entry.text = host_config
[entry.attrib.__setitem__(key, value) for \
(key, value) in self.client_attrib.iteritems()]
try:
fileh = open( "%s/%s-host.cfg" % \
(self.data, metadata.hostname), 'w' )
fileh.write(host_config)
fileh.close()
except OSError, ioerr:
LOGGER.error("Failed to write %s/%s-host.cfg" % \
(self.data, metadata.hostname))
LOGGER.error(ioerr)
def createserverconfig(self, entry, metadata):
'''Build monolithic server configuration file'''
host_configs = glob.glob('%s/*-host.cfg' % self.data)
group_configs = glob.glob('%s/*-group.cfg' % self.data)
host_data = ""
group_data = ""
for host in host_configs:
hostfile = open( host, 'r' )
host_data += hostfile.read()
hostfile.close()
for group in group_configs:
group_name = re.sub("(-group.cfg|.*/(?=[^/]+))", "", group)
if host_data.find(group_name) != -1:
groupfile = open( group, 'r' )
group_data += groupfile.read()
groupfile.close()
entry.text = group_data + host_data
[entry.attrib.__setitem__(key, value) for \
(key, value) in self.server_attrib.iteritems()]
try:
fileh = open( "%s/nagiosgen.cfg" % (self.data), 'w' )
fileh.write(group_data + host_data)
fileh.close()
except OSError, ioerr:
LOGGER.error("Failed to write %s/nagiosgen.cfg" % (self.data))
LOGGER.error(ioerr)
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