/usr/lib/python2.7/dist-packages/ipaserver/plugins/topology.py is in python-ipaserver 4.7.0~pre1+git20180411-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 | #
# Copyright (C) 2015 FreeIPA Contributors see COPYING for license
#
import six
from ipalib import api, errors
from ipalib import Int, Str, StrEnum, Flag, DNParam
from ipalib.plugable import Registry
from .baseldap import (
LDAPObject, LDAPSearch, LDAPCreate, LDAPDelete, LDAPUpdate, LDAPQuery,
LDAPRetrieve)
from ipalib import _, ngettext
from ipalib import output
from ipalib.constants import DOMAIN_LEVEL_1
from ipaserver.topology import (
create_topology_graph, get_topology_connection_errors,
map_masters_to_suffixes)
from ipapython.dn import DN
if six.PY3:
unicode = str
__doc__ = _("""
Topology
Management of a replication topology at domain level 1.
""") + _("""
IPA server's data is stored in LDAP server in two suffixes:
* domain suffix, e.g., 'dc=example,dc=com', contains all domain related data
* ca suffix, 'o=ipaca', is present only on server with CA installed. It
contains data for Certificate Server component
""") + _("""
Data stored on IPA servers is replicated to other IPA servers. The way it is
replicated is defined by replication agreements. Replication agreements needs
to be set for both suffixes separately. On domain level 0 they are managed
using ipa-replica-manage and ipa-csreplica-manage tools. With domain level 1
they are managed centrally using `ipa topology*` commands.
""") + _("""
Agreements are represented by topology segments. By default topology segment
represents 2 replication agreements - one for each direction, e.g., A to B and
B to A. Creation of unidirectional segments is not allowed.
""") + _("""
To verify that no server is disconnected in the topology of the given suffix,
use:
ipa topologysuffix-verify $suffix
""") + _("""
Examples:
Find all IPA servers:
ipa server-find
""") + _("""
Find all suffixes:
ipa topologysuffix-find
""") + _("""
Add topology segment to 'domain' suffix:
ipa topologysegment-add domain --left IPA_SERVER_A --right IPA_SERVER_B
""") + _("""
Add topology segment to 'ca' suffix:
ipa topologysegment-add ca --left IPA_SERVER_A --right IPA_SERVER_B
""") + _("""
List all topology segments in 'domain' suffix:
ipa topologysegment-find domain
""") + _("""
List all topology segments in 'ca' suffix:
ipa topologysegment-find ca
""") + _("""
Delete topology segment in 'domain' suffix:
ipa topologysegment-del domain segment_name
""") + _("""
Delete topology segment in 'ca' suffix:
ipa topologysegment-del ca segment_name
""") + _("""
Verify topology of 'domain' suffix:
ipa topologysuffix-verify domain
""") + _("""
Verify topology of 'ca' suffix:
ipa topologysuffix-verify ca
""")
register = Registry()
def validate_domain_level(api):
current = int(api.Command.domainlevel_get()['result'])
if current < DOMAIN_LEVEL_1:
raise errors.InvalidDomainLevelError(
reason=_('Topology management requires minimum domain level {0} '
.format(DOMAIN_LEVEL_1))
)
@register()
class topologysegment(LDAPObject):
"""
Topology segment.
"""
parent_object = 'topologysuffix'
container_dn = api.env.container_topology
object_name = _('segment')
object_name_plural = _('segments')
object_class = ['iparepltoposegment']
default_attributes = [
'cn',
'ipaReplTopoSegmentdirection', 'ipaReplTopoSegmentrightNode',
'ipaReplTopoSegmentLeftNode', 'nsds5replicastripattrs',
'nsds5replicatedattributelist', 'nsds5replicatedattributelisttotal',
'nsds5replicatimeout', 'nsds5replicaenabled'
]
search_display_attributes = [
'cn', 'ipaReplTopoSegmentdirection', 'ipaReplTopoSegmentrightNode',
'ipaReplTopoSegmentLeftNode'
]
label = _('Topology Segments')
label_singular = _('Topology Segment')
takes_params = (
Str(
'cn',
maxlength=255,
cli_name='name',
primary_key=True,
label=_('Segment name'),
default_from=lambda iparepltoposegmentleftnode, iparepltoposegmentrightnode:
'%s-to-%s' % (iparepltoposegmentleftnode, iparepltoposegmentrightnode),
normalizer=lambda value: value.lower(),
doc=_('Arbitrary string identifying the segment'),
),
Str(
'iparepltoposegmentleftnode',
pattern='^[a-zA-Z0-9.][a-zA-Z0-9.-]*[a-zA-Z0-9.$-]?$',
pattern_errmsg='may only include letters, numbers, -, . and $',
maxlength=255,
cli_name='leftnode',
label=_('Left node'),
normalizer=lambda value: value.lower(),
doc=_('Left replication node - an IPA server'),
flags={'no_update'},
),
Str(
'iparepltoposegmentrightnode',
pattern='^[a-zA-Z0-9.][a-zA-Z0-9.-]*[a-zA-Z0-9.$-]?$',
pattern_errmsg='may only include letters, numbers, -, . and $',
maxlength=255,
cli_name='rightnode',
label=_('Right node'),
normalizer=lambda value: value.lower(),
doc=_('Right replication node - an IPA server'),
flags={'no_update'},
),
StrEnum(
'iparepltoposegmentdirection',
cli_name='direction',
label=_('Connectivity'),
values=(u'both', u'left-right', u'right-left'),
default=u'both',
autofill=True,
doc=_('Direction of replication between left and right replication '
'node'),
flags={'no_option', 'no_update'},
),
Str(
'nsds5replicastripattrs?',
cli_name='stripattrs',
label=_('Attributes to strip'),
normalizer=lambda value: value.lower(),
doc=_('A space separated list of attributes which are removed from '
'replication updates.')
),
Str(
'nsds5replicatedattributelist?',
cli_name='replattrs',
label='Attributes to replicate',
doc=_('Attributes that are not replicated to a consumer server '
'during a fractional update. E.g., `(objectclass=*) '
'$ EXCLUDE accountlockout memberof'),
),
Str(
'nsds5replicatedattributelisttotal?',
cli_name='replattrstotal',
label=_('Attributes for total update'),
doc=_('Attributes that are not replicated to a consumer server '
'during a total update. E.g. (objectclass=*) $ EXCLUDE '
'accountlockout'),
),
Int(
'nsds5replicatimeout?',
cli_name='timeout',
label=_('Session timeout'),
minvalue=0,
doc=_('Number of seconds outbound LDAP operations waits for a '
'response from the remote replica before timing out and '
'failing'),
),
StrEnum(
'nsds5replicaenabled?',
cli_name='enabled',
label=_('Replication agreement enabled'),
doc=_('Whether a replication agreement is active, meaning whether '
'replication is occurring per that agreement'),
values=(u'on', u'off'),
flags={'no_option'},
),
)
def validate_nodes(self, ldap, dn, entry_attrs, suffix):
leftnode = entry_attrs.get('iparepltoposegmentleftnode')
rightnode = entry_attrs.get('iparepltoposegmentrightnode')
if not leftnode and not rightnode:
return # nothing to check
# check if nodes are IPA servers
masters = self.api.Command.server_find(
'', sizelimit=0, no_members=False)['result']
m_hostnames = [master['cn'][0].lower() for master in masters]
if leftnode and leftnode not in m_hostnames:
raise errors.ValidationError(
name='leftnode',
error=_('left node is not a topology node: %(leftnode)s') %
dict(leftnode=leftnode)
)
if rightnode and rightnode not in m_hostnames:
raise errors.ValidationError(
name='rightnode',
error=_('right node is not a topology node: %(rightnode)s') %
dict(rightnode=rightnode)
)
# prevent creation of reflexive relation
key = 'leftnode'
if not leftnode or not rightnode: # get missing end
_entry_attrs = ldap.get_entry(dn, ['*'])
if not leftnode:
key = 'rightnode'
leftnode = _entry_attrs['iparepltoposegmentleftnode'][0]
else:
rightnode = _entry_attrs['iparepltoposegmentrightnode'][0]
if leftnode == rightnode:
raise errors.ValidationError(
name=key,
error=_('left node and right node must not be the same')
)
# don't allow segment between nodes where both don't have the suffix
masters_to_suffix = map_masters_to_suffixes(masters)
suffix_masters = masters_to_suffix.get(suffix, [])
suffix_m_hostnames = [m['cn'][0].lower() for m in suffix_masters]
if leftnode not in suffix_m_hostnames:
raise errors.ValidationError(
name='leftnode',
error=_("left node ({host}) does not support "
"suffix '{suff}'"
.format(host=leftnode, suff=suffix))
)
if rightnode not in suffix_m_hostnames:
raise errors.ValidationError(
name='rightnode',
error=_("right node ({host}) does not support "
"suffix '{suff}'"
.format(host=rightnode, suff=suffix))
)
@register()
class topologysegment_find(LDAPSearch):
__doc__ = _('Search for topology segments.')
msg_summary = ngettext(
'%(count)d segment matched',
'%(count)d segments matched', 0
)
@register()
class topologysegment_add(LDAPCreate):
__doc__ = _('Add a new segment.')
msg_summary = _('Added segment "%(value)s"')
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
validate_domain_level(self.api)
self.obj.validate_nodes(ldap, dn, entry_attrs, keys[0])
return dn
@register()
class topologysegment_del(LDAPDelete):
__doc__ = _('Delete a segment.')
msg_summary = _('Deleted segment "%(value)s"')
def pre_callback(self, ldap, dn, *keys, **options):
assert isinstance(dn, DN)
validate_domain_level(self.api)
return dn
@register()
class topologysegment_mod(LDAPUpdate):
__doc__ = _('Modify a segment.')
msg_summary = _('Modified segment "%(value)s"')
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
validate_domain_level(self.api)
self.obj.validate_nodes(ldap, dn, entry_attrs, keys[0])
return dn
@register()
class topologysegment_reinitialize(LDAPQuery):
__doc__ = _('Request a full re-initialization of the node '
'retrieving data from the other node.')
has_output = output.standard_value
msg_summary = _('%(value)s')
takes_options = (
Flag(
'left?',
doc=_('Initialize left node'),
default=False,
),
Flag(
'right?',
doc=_('Initialize right node'),
default=False,
),
Flag(
'stop?',
doc=_('Stop already started refresh of chosen node(s)'),
default=False,
),
)
def execute(self, *keys, **options):
dn = self.obj.get_dn(*keys, **options)
validate_domain_level(self.api)
entry = self.obj.backend.get_entry(
dn, [
'nsds5beginreplicarefresh;left',
'nsds5beginreplicarefresh;right'
])
left = options.get('left')
right = options.get('right')
stop = options.get('stop')
if not left and not right:
raise errors.OptionError(
_('left or right node has to be specified')
)
if left and right:
raise errors.OptionError(
_('only one node can be specified')
)
action = u'start'
msg = _('Replication refresh for segment: "%(pkey)s" requested.')
if stop:
action = u'stop'
msg = _('Stopping of replication refresh for segment: "'
'%(pkey)s" requested.')
# left and right are swapped because internally it's a push not
# pull operation
if right:
entry['nsds5beginreplicarefresh;left'] = [action]
if left:
entry['nsds5beginreplicarefresh;right'] = [action]
self.obj.backend.update_entry(entry)
msg = msg % {'pkey': keys[-1]}
return dict(
result=True,
value=msg,
)
@register()
class topologysegment_show(LDAPRetrieve):
__doc__ = _('Display a segment.')
@register()
class topologysuffix(LDAPObject):
"""
Suffix managed by the topology plugin.
"""
container_dn = api.env.container_topology
object_name = _('suffix')
object_name_plural = _('suffixes')
object_class = ['iparepltopoconf']
default_attributes = ['cn', 'ipaReplTopoConfRoot']
search_display_attributes = ['cn', 'ipaReplTopoConfRoot']
label = _('Topology suffixes')
label_singular = _('Topology suffix')
takes_params = (
Str(
'cn',
cli_name='name',
primary_key=True,
label=_('Suffix name'),
),
DNParam(
'iparepltopoconfroot',
cli_name='suffix_dn',
label=_('Managed LDAP suffix DN'),
),
)
@register()
class topologysuffix_find(LDAPSearch):
__doc__ = _('Search for topology suffixes.')
msg_summary = ngettext(
'%(count)d topology suffix matched',
'%(count)d topology suffixes matched', 0
)
@register()
class topologysuffix_del(LDAPDelete):
__doc__ = _('Delete a topology suffix.')
NO_CLI = True
msg_summary = _('Deleted topology suffix "%(value)s"')
def pre_callback(self, ldap, dn, *keys, **options):
assert isinstance(dn, DN)
validate_domain_level(self.api)
return dn
@register()
class topologysuffix_add(LDAPCreate):
__doc__ = _('Add a new topology suffix to be managed.')
NO_CLI = True
msg_summary = _('Added topology suffix "%(value)s"')
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
validate_domain_level(self.api)
return dn
@register()
class topologysuffix_mod(LDAPUpdate):
__doc__ = _('Modify a topology suffix.')
NO_CLI = True
msg_summary = _('Modified topology suffix "%(value)s"')
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
validate_domain_level(self.api)
return dn
@register()
class topologysuffix_show(LDAPRetrieve):
__doc__ = _('Show managed suffix.')
@register()
class topologysuffix_verify(LDAPQuery):
__doc__ = _('''
Verify replication topology for suffix.
Checks done:
1. check if a topology is not disconnected. In other words if there are
replication paths between all servers.
2. check if servers don't have more than the recommended number of
replication agreements
''')
def execute(self, *keys, **options):
validate_domain_level(self.api)
masters = self.api.Command.server_find(
'', sizelimit=0, no_members=False)['result']
masters = map_masters_to_suffixes(masters).get(keys[0], [])
segments = self.api.Command.topologysegment_find(
keys[0], sizelimit=0)['result']
graph = create_topology_graph(masters, segments)
master_cns = [m['cn'][0] for m in masters]
master_cns.sort()
# check if each master can contact others
connect_errors = get_topology_connection_errors(graph)
# check if suggested maximum number of agreements per replica
max_agmts_errors = []
for m in master_cns:
# chosen direction doesn't matter much given that 'both' is the
# only allowed direction
suppliers = graph.get_tails(m)
if len(suppliers) > self.api.env.recommended_max_agmts:
max_agmts_errors.append((m, suppliers))
return dict(
result={
'in_order': not connect_errors and not max_agmts_errors,
'connect_errors': connect_errors,
'max_agmts_errors': max_agmts_errors,
'max_agmts': self.api.env.recommended_max_agmts
},
)
|