author | Tero Marttila <terom@paivola.fi> |
Mon, 16 Dec 2013 17:11:56 +0200 | |
changeset 266 | 4eb3d73d852c |
parent 265 | bin/pvl.dns-hosts@5f2807999222 |
child 268 | 560ba0544254 |
permissions | -rwxr-xr-x |
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#!/usr/bin/env python |
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""" |
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Manipulate host definitions for dns/dhcp. |
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""" |
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import pvl.args, optparse |
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import pvl.dns.zone |
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import pvl.dhcp.config |
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import pvl.ldap.args |
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import ipaddr |
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import optparse |
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import collections |
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import re |
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import logging; log = logging.getLogger('pvl.hosts-import') |
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__version__ = '0.1' |
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def parse_options (argv) : |
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""" |
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Parse command-line arguments. |
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""" |
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parser = optparse.OptionParser( |
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prog = argv[0], |
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usage = '%prog: [options]', |
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version = __version__, |
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# module docstring |
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description = __doc__, |
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) |
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# logging |
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parser.add_option_group(pvl.args.parser(parser)) |
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parser.add_option_group(pvl.ldap.args.parser(parser)) |
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parser.add_option('-c', '--input-charset', metavar='CHARSET', default='utf-8', |
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help="Encoding used for input files") |
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parser.add_option('--output-charset', metavar='CHARSET', default='utf-8', |
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help="Encoding used for output files") |
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# input |
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parser.add_option('--import-zone-hosts', metavar='FILE', |
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help="Load hosts from DNS zone") |
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parser.add_option('--import-dhcp-hosts', metavar='FILE', |
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help="Load hosts from DHCP config") |
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parser.add_option('--dump-host-comments', action='store_true', |
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help="Dump out info on imported host comments") |
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# defaults |
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parser.add_option('--hosts-domain', metavar='DOMAIN', |
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help="Default domain for hosts") |
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parser.add_option('--zone-unused', metavar='HOST', |
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help="DNS name for unallocated hosts") |
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# output |
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parser.add_option('--output-hosts', metavar='FILE', |
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help="Output hosts file") |
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parser.add_option('--output-prefix', metavar='PREFIX', |
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help="Select hosts by ip prefix") |
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# defaults |
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parser.set_defaults( |
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) |
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# parse |
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options, args = parser.parse_args(argv[1:]) |
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# apply |
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pvl.args.apply(options, argv[0]) |
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return options, args |
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def import_zone_hosts (options, file) : |
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""" |
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Yield host info from zonefile records. |
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""" |
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for rr in pvl.dns.zone.ZoneRecord.load(file) : |
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if options.zone_unused and rr.name == options.zone_unused : |
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log.debug("%s: skip %s", rr.name, rr) |
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continue |
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elif rr.type == 'A' : |
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ip, = rr.data |
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yield rr.name, 'ip', ipaddr.IPAddress(ip) |
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if rr.comment : |
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yield rr.name, 'comment', rr.comment |
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elif rr.type == 'CNAME' : |
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host, = rr.data |
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yield host, 'alias', rr.name |
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else : |
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log.warn("%s: unknown rr: %s", rr.name, rr) |
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def import_dhcp_host (options, host, items) : |
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""" |
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Yield host infos from a dhcp host ... { ... } |
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""" |
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hostname = None |
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ethernet = [] |
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fixed_address = None |
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115 |
|
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116 |
for item in items : |
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117 |
item, args = item[0], item[1:] |
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118 |
|
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119 |
if item == 'hardware' : |
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120 |
_ethernet, ethernet = args |
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121 |
assert _ethernet == 'ethernet' |
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122 |
elif item == 'fixed-address' : |
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123 |
fixed_address, = args |
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124 |
elif item == 'option' : |
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option = args.pop(0) |
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126 |
|
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127 |
if option == 'host-name' : |
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128 |
hostname, = args |
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129 |
else : |
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130 |
log.warn("host %s: ignore unknown option: %s", host, option) |
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131 |
else : |
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132 |
log.warn("host %s: ignore unknown item: %s", host, item) |
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133 |
|
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134 |
# determine hostname |
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135 |
suffix = None |
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136 |
|
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if '-' in host : |
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138 |
hostname, suffix = host.rsplit('-', 1) |
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139 |
else : |
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140 |
hostname = host |
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141 |
|
264
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142 |
if fixed_address and not re.match(r'\d+\.\d+\.\d+.\d+', fixed_address) : |
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hostname, domain = fixed_address.split('.', 1) |
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144 |
|
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145 |
#if suffix : |
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146 |
# yield hostname, 'ethernet:{suffix}'.format(suffix=suffix), ethernet |
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if hostname and ethernet : |
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148 |
yield hostname, 'ethernet', ethernet |
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149 |
else : |
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log.warn("%s: no hostname/ethernet: %s/%s", host, hostname, ethernet) |
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151 |
|
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152 |
def import_dhcp_hosts (options, blocks) : |
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153 |
""" |
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154 |
Process hosts from a parsed block |
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155 |
""" |
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156 |
|
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157 |
for block, items, blocks in blocks : |
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158 |
log.info("%s", block) |
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159 |
|
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160 |
block, args = block[0], block[1:] |
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161 |
|
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162 |
if block == 'group' : |
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163 |
for info in import_dhcp_hosts(options, blocks) : |
259
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|
164 |
yield info |
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|
165 |
elif block == 'host' : |
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166 |
host, = args |
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|
167 |
|
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|
168 |
try : |
263
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169 |
for info in import_dhcp_host(options, host, items) : |
259
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|
170 |
yield info |
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|
171 |
except ValueError as error : |
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|
172 |
log.warn("%s: invalid host: %s", host, error) |
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|
173 |
else: |
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|
174 |
log.warn("ignore unknown block: %s", block) |
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|
175 |
|
263
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|
176 |
def import_dhcp_conf (options, file) : |
259
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177 |
items, blocks = pvl.dhcp.config.DHCPConfigParser().load(file) |
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|
178 |
|
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|
179 |
for item in items : |
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|
180 |
item, args = item[0], item[1:] |
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|
181 |
|
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|
182 |
if item == 'include' : |
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|
183 |
include, = args |
263
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|
184 |
for info in import_dhcp_conf(options, pvl.args.apply_file(include)) : |
259
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|
185 |
yield info |
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|
186 |
else : |
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|
187 |
log.warn("ignore unknown item: %s", item) |
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|
188 |
|
263
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diff
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|
189 |
for info in import_dhcp_hosts(options, blocks) : |
259
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|
190 |
yield info |
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|
191 |
|
260
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|
192 |
ZONE_COMMENTS = ( |
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|
193 |
re.compile(r'(?P<owner>[^/]+)\s*-\s+(?P<host>.+)'), |
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|
194 |
re.compile(r'(?P<group>.+?)\s*/\s*(?P<owner>.+)\s+[/-]\s+(?P<host>.+)'), |
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|
195 |
re.compile(r'(?P<group>.+?)\s*/\s*(?P<owner>.+)\s+[(]\s*(?P<host>.+)[)]'), |
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|
196 |
re.compile(r'(?P<group>.+?)\s*/\s*(?P<owner>.+)'), |
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|
197 |
re.compile(r'(?P<owner>.+)'), |
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|
198 |
) |
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|
199 |
|
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|
200 |
ZONE_OWNER_MAIL = re.compile(r'(?P<owner>.*?)\s*<(?P<mail>.+?)>') |
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|
201 |
|
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|
202 |
def process_zone_comment (options, hostname, comment) : |
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|
203 |
""" |
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|
204 |
Attempt to parse a host comment field... :D |
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|
205 |
|
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|
206 |
Yields (field, value) bits |
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|
207 |
""" |
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|
208 |
|
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|
209 |
for regex in ZONE_COMMENTS : |
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|
210 |
match = regex.match(comment) |
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|
211 |
|
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|
212 |
if match : |
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|
213 |
break |
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|
214 |
else : |
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|
215 |
log.warn("%s: unparsed comment: %s", hostname, comment) |
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|
216 |
return |
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|
217 |
|
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|
218 |
matches = match.groupdict() |
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|
219 |
owner = matches.pop('owner', None) |
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|
220 |
|
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|
221 |
if owner : |
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|
222 |
mail_match = ZONE_OWNER_MAIL.match(owner) |
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|
223 |
|
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|
224 |
if mail_match : |
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|
225 |
mail_matches = mail_match.groupdict() |
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owner = mail_matches['owner'] |
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yield 'mail', mail_matches['mail'].strip() |
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229 |
|
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yield 'owner', owner.strip() |
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231 |
|
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for field, value in matches.iteritems() : |
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if value : |
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yield field, value.strip() |
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235 |
|
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NONE_OWNERS = set(( |
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u'tech', |
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u'atk', |
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u'toimisto', |
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240 |
)) |
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241 |
|
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def process_host_owner_ldap (options, host, info) : |
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""" |
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Yield guesses for user from LDAP. |
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""" |
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246 |
|
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if info.get('mail') : |
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for user in options.ldap.users.filter( |
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{ 'mailLocalAddress': info['mail'] }, |
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{ 'uid': info['mail'] }, |
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) : |
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yield user, None |
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253 |
|
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if info.get('group') and info.get('owner') : |
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groups = options.ldap.groups.filter(cn=info['group']) |
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256 |
|
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for group in groups : |
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for user in options.ldap.users.filter({ |
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'gidNumber': group['gidNumber'], |
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'cn': info['owner'], |
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}) : |
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yield user, group |
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263 |
|
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if info.get('owner') : |
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for user in options.ldap.users.filter({ |
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'cn': info['owner'], |
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267 |
}) : |
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yield user, None |
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269 |
|
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def process_host_owner (options, host, info) : |
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""" |
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Return (owner, comment) for host based on info, or None. |
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""" |
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274 |
|
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if info.get('owner').lower() in NONE_OWNERS : |
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return False |
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277 |
|
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278 |
# from ldap? |
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for ldap in process_host_owner_ldap(options, host, info) : |
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user, group = ldap |
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281 |
|
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282 |
if not group : |
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283 |
# get group from ldap |
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group = options.ldap.users.group(user) |
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|
285 |
|
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286 |
return user['uid'], u"{group} / {user}".format( |
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287 |
user = user.getunicode('cn'), |
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288 |
group = group.getunicode('cn'), |
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|
289 |
) |
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|
290 |
|
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291 |
def process_host_comments (options, host, info) : |
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292 |
""" |
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293 |
Process host fields from comment. |
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|
294 |
|
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295 |
Attempts to find owner from LDAP.. |
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|
296 |
""" |
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|
297 |
|
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|
298 |
log.debug("%s: %s", host, info) |
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|
299 |
|
263
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300 |
owner = process_host_owner(options, host, info) |
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|
301 |
|
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|
302 |
if owner is False : |
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|
303 |
# do not mark any owner |
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|
304 |
pass |
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|
305 |
|
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306 |
elif owner : |
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307 |
owner, comment = owner |
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|
308 |
|
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309 |
log.info("%s: %s (%s)", host, owner, comment) |
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|
310 |
|
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311 |
yield 'owner-comment', comment |
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312 |
yield 'owner', owner, |
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|
313 |
|
261
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|
314 |
else : |
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315 |
log.warn("%s: unknown owner: %s", host, info) |
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316 |
yield 'comment', "owner: {group} / {owner}".format( |
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317 |
group = info.get('group', ''), |
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318 |
owner = info.get('owner', ''), |
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|
319 |
) |
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|
320 |
|
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|
321 |
if info.get('host') : |
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yield 'comment', info['host'] |
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|
323 |
|
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324 |
def process_hosts_comments (options, import_hosts) : |
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325 |
""" |
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|
326 |
Parse out comments from host imports.. |
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327 |
""" |
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|
328 |
|
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329 |
for host, field, value in import_hosts : |
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330 |
if field != 'comment': |
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331 |
yield host, field, value |
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332 |
continue |
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|
333 |
|
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334 |
fields = dict(process_zone_comment(options, host, value)) |
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|
335 |
|
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336 |
if options.dump_host_comments : |
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|
337 |
print u"{host:20} {comment:80} = {group:15} / {owner:20} <{mail:20}> / {hostinfo}".format( |
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host = host, |
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comment = value, |
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group = fields.get('group', ''), |
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owner = fields.get('owner', ''), |
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mail = fields.get('mail', ''), |
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hostinfo = fields.get('host', ''), |
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344 |
).encode('utf-8') |
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345 |
|
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346 |
|
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for field, value in process_host_comments(options, host, fields) : |
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yield host, field, value |
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349 |
|
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350 |
def apply_hosts_import (options) : |
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""" |
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Import host infos from given files. |
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353 |
""" |
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354 |
|
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355 |
if options.import_zone_hosts: |
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for info in import_zone_hosts(options, |
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pvl.args.apply_file(options.import_zone_hosts)) : |
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358 |
yield info |
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359 |
|
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if options.import_dhcp_hosts: |
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for info in import_dhcp_conf(options, |
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pvl.args.apply_file(options.import_dhcp_hosts)) : |
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363 |
yield info |
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364 |
|
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365 |
def import_hosts (options) : |
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366 |
""" |
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367 |
Import hosts from dns/dhcp. |
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368 |
""" |
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369 |
|
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import_hosts = apply_hosts_import(options) |
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import_hosts = process_hosts_comments(options, import_hosts) |
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372 |
|
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373 |
# gather |
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hosts = collections.defaultdict(lambda: collections.defaultdict(list)) |
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375 |
|
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376 |
for host, field, value in import_hosts : |
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377 |
hosts[host][field].append(value) |
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|
378 |
|
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|
379 |
return hosts.iteritems() |
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|
380 |
|
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381 |
def process_export_hosts (options, hosts) : |
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382 |
if options.output_prefix : |
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prefix = ipaddr.IPNetwork(options.output_prefix) |
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384 |
else : |
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385 |
prefix = None |
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|
386 |
|
263
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387 |
for host, fields in hosts : |
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388 |
ip = fields.get('ip') |
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|
389 |
|
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390 |
# sort by IP |
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|
391 |
if ip : |
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392 |
sort = ip = ip[0] |
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|
393 |
else : |
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394 |
# fake, to sort correctly |
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|
395 |
sort = ipaddr.IPAddress(0) |
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|
396 |
|
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|
397 |
# select |
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|
398 |
if prefix: |
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|
399 |
if not (ip and ip in prefix) : |
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400 |
continue |
263
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|
401 |
|
265
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402 |
yield sort, host, fields |
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|
403 |
|
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|
404 |
def export_hosts (options, hosts) : |
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405 |
""" |
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406 |
Export hosts to file. |
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407 |
""" |
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|
408 |
|
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|
409 |
file = pvl.args.apply_file(options.output_hosts, 'w', options.output_charset) |
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|
410 |
|
265
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411 |
# filter + sort |
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412 |
hosts = [(host, fields) for sort, host, fields in sorted(process_export_hosts(options, hosts))] |
263
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|
413 |
|
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|
414 |
for host, fields in hosts : |
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|
415 |
for comment in fields.get('comment', ()) : |
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|
416 |
print >>file, u"# {comment}".format(comment=comment) |
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|
417 |
|
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|
418 |
print >>file, u"[{host}]".format(host=host) |
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|
419 |
|
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|
420 |
for field, fmt in ( |
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|
421 |
('ip', None), |
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422 |
('ethernet', None), |
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423 |
('owner', u"\t{field:15} = {value} # {fields[owner-comment][0]}"), |
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|
424 |
) : |
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|
425 |
if not fmt : |
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426 |
fmt = u"\t{field:15} = {value}" |
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|
427 |
|
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|
428 |
for value in fields.get(field, ()) : |
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429 |
print >>file, fmt.format(field=field, value=value, fields=fields) |
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|
430 |
|
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|
431 |
print >>file |
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|
432 |
|
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changeset
|
433 |
def main (argv) : |
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434 |
options, args = parse_options(argv) |
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435 |
|
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436 |
options.ldap = pvl.ldap.args.apply(options) |
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|
437 |
|
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|
438 |
if args : |
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|
439 |
# direct from file |
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|
440 |
hosts = pvl.args.apply_files(args, 'r', options.input_charset) |
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|
441 |
else : |
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|
442 |
# import |
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|
443 |
hosts = import_hosts(options) |
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changeset
|
444 |
|
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changeset
|
445 |
# output |
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|
446 |
if options.output_hosts : |
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447 |
export_hosts(options, hosts) |
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parents:
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changeset
|
448 |
|
65b483fb862c
pvl.dns-hosts: import hosts from dns/dhcp
Tero Marttila <terom@paivola.fi>
parents:
diff
changeset
|
449 |
if __name__ == '__main__': |
65b483fb862c
pvl.dns-hosts: import hosts from dns/dhcp
Tero Marttila <terom@paivola.fi>
parents:
diff
changeset
|
450 |
pvl.args.main(main) |