1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
'''This module implements a Nagios configuration generator'''
import os
import re
import sys
import glob
import socket
import logging
import Bcfg2.Server
import Bcfg2.Server.Plugin
LOGGER = logging.getLogger(__name__)
class NagiosGenConfig(Bcfg2.Server.Plugin.StructFile):
""" NagiosGen config file handler """
def __init__(self, filename, fam):
# create config.xml if missing
if not os.path.exists(filename):
LOGGER.warning("NagiosGen: %s missing. "
"Creating empty one for you." % filename)
open(filename, "w").write("<NagiosGen></NagiosGen>")
Bcfg2.Server.Plugin.StructFile.__init__(self, filename, fam=fam,
should_monitor=True)
class NagiosGen(Bcfg2.Server.Plugin.Plugin,
Bcfg2.Server.Plugin.Generator):
""" NagiosGen is a Bcfg2 plugin that dynamically generates Nagios
configuration file based on Bcfg2 data. """
__author__ = 'bcfg-dev@mcs.anl.gov'
line_fmt = '\t%-32s %s'
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
Bcfg2.Server.Plugin.Generator.__init__(self)
self.config = NagiosGenConfig(os.path.join(self.data, 'config.xml'),
core.fam)
self.Entries = {'Path':
{'/etc/nagiosgen.status': self.createhostconfig,
'/etc/nagios/nagiosgen.cfg': self.createserverconfig}}
self.client_attrib = {'encoding': 'ascii',
'owner': 'root',
'group': 'root',
'type': 'file',
'mode': '0400'}
self.server_attrib = {'encoding': 'ascii',
'owner': 'nagios',
'group': 'nagios',
'type': 'file',
'mode': '0440'}
def createhostconfig(self, entry, metadata):
"""Build host specific configuration file."""
try:
host_address = socket.gethostbyname(metadata.hostname)
except socket.gaierror:
self.logger.error("Failed to find IP address for %s" %
metadata.hostname)
raise Bcfg2.Server.Plugin.PluginExecutionError
host_groups = [grp for grp in metadata.groups
if os.path.isfile('%s/%s-group.cfg' % (self.data, grp))]
host_config = ['define host {',
self.line_fmt % ('host_name', metadata.hostname),
self.line_fmt % ('alias', metadata.hostname),
self.line_fmt % ('address', host_address)]
if host_groups:
host_config.append(self.line_fmt % ("hostgroups",
",".join(host_groups)))
# read the config
xtra = dict()
for el in self.config.Match(metadata):
if el.tag == 'Option':
xtra[el.get("name")] = el.text
if xtra:
host_config.extend([self.line_fmt % (opt, val)
for opt, val in list(xtra.items())])
if 'use' not in xtra:
host_config.append(self.line_fmt % ('use', 'default'))
host_config.append('}')
entry.text = "%s\n" % "\n".join(host_config)
for (key, value) in list(self.client_attrib.items()):
entry.attrib.__setitem__(key, value)
fname = os.path.join(self.data, metadata.hostname + "-host.cfg")
try:
open(fname, 'w').write(entry.text)
except OSError:
err = sys.exc_info()[1]
self.logger.error("Failed to write %s: %s" % (fname, err))
def createserverconfig(self, entry, _):
"""Build monolithic server configuration file."""
host_configs = glob.glob(os.path.join(self.data, '*-host.cfg'))
group_configs = glob.glob(os.path.join(self.data, '*-group.cfg'))
host_data = []
group_data = []
for host in host_configs:
host_data.append(open(host, 'r').read())
group_list = []
for line in "\n".join(host_data).splitlines():
# only include those groups which are actually used
if "hostgroup" in line:
group_list += line.split()[1].split(',')
group_list = list(set(group_list))
for group in group_configs:
group_name = re.sub("(-group.cfg|.*/(?=[^/]+))", "", group)
if group_name in group_list:
groupfile = open(group, 'r')
group_data.append(groupfile.read())
groupfile.close()
entry.text = "%s\n\n%s" % ("\n".join(group_data), "\n".join(host_data))
for (key, value) in list(self.server_attrib.items()):
entry.attrib.__setitem__(key, value)
fname = os.path.join(self.data, "nagiosgen.cfg")
try:
open(fname, 'w').write(entry.text)
except OSError:
err = sys.exc_info()[1]
self.logger.error("Failed to write %s: %s" % (fname, err))
|
