freeipa/ipaserver/install/replication.py
Martin Babinsky 3dc9ab1621 replication: augment setup_promote_replication method
the method that sets up initial GSSAPI replication in DL1 was augmented so
that the specified bind DN/bind password allows simple bind to remote master
using STARTTLS. The CA certificate for the connection is also configurable.

This facilitates the use of this method in DL0 where GSSAPI bind can not be
used during DS bootstrap while DM credentials are available.

https://fedorahosted.org/freeipa/ticket/6406

Reviewed-By: Martin Basti <mbasti@redhat.com>
2016-11-17 00:39:17 +01:00

1801 lines
67 KiB
Python

# Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
#
# Copyright (C) 2007 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import print_function
import six
import time
import datetime
import sys
import os
from random import randint
import ldap
from ipalib import api, errors
from ipalib.cli import textui
from ipalib.constants import CACERT
from ipapython.ipa_log_manager import root_logger
from ipapython import ipautil, ipaldap
from ipapython.admintool import ScriptError
from ipapython.dn import DN
from ipaplatform.paths import paths
from ipaserver.install import installutils
if six.PY3:
unicode = str
# the default container used by AD for user entries
WIN_USER_CONTAINER = DN(('cn', 'Users'))
# the default container used by IPA for user entries
IPA_USER_CONTAINER = DN(('cn', 'users'), ('cn', 'accounts'))
PORT = 636
DEFAULT_PORT = 389
TIMEOUT = 120
REPL_MAN_DN = DN(('cn', 'replication manager'), ('cn', 'config'))
DNA_DN = DN(('cn', 'Posix IDs'), ('cn', 'Distributed Numeric Assignment Plugin'), ('cn', 'plugins'), ('cn', 'config'))
REPL_MANAGERS_CN = DN(('cn', 'replication managers'))
IPA_REPLICA = 1
WINSYNC = 2
# List of attributes that need to be excluded from replication initialization.
TOTAL_EXCLUDES = ('entryusn',
'krblastsuccessfulauth',
'krblastfailedauth',
'krbloginfailedcount')
# List of attributes that need to be excluded from normal replication.
EXCLUDES = ('memberof', 'idnssoaserial') + TOTAL_EXCLUDES
# List of attributes that are not updated on empty replication
STRIP_ATTRS = ('modifiersName',
'modifyTimestamp',
'internalModifiersName',
'internalModifyTimestamp')
def replica_conn_check(master_host, host_name, realm, check_ca,
dogtag_master_ds_port, admin_password=None,
principal="admin", ca_cert_file=None):
"""
Check the ports used by the replica both locally and remotely to be sure
that replication will work.
Does not return a value, will raise ScriptError on failure.
"""
print("Run connection check to master")
args = [paths.IPA_REPLICA_CONNCHECK, "--master", master_host,
"--auto-master-check", "--realm", realm,
"--hostname", host_name]
nolog=tuple()
if principal is not None:
args.extend(["--principal", principal])
if admin_password:
args.extend(["--password", admin_password])
nolog=(admin_password,)
if check_ca and dogtag_master_ds_port == 7389:
args.append('--check-ca')
if ca_cert_file:
args.extend(["--ca-cert-file", ca_cert_file])
result = ipautil.run(
args, raiseonerr=False, capture_output=False, nolog=nolog)
if result.returncode != 0:
raise ScriptError(
"Connection check failed!"
"\nPlease fix your network settings according to error messages above."
"\nIf the check results are not valid it can be skipped with --skip-conncheck parameter.")
else:
print("Connection check OK")
def enable_replication_version_checking(realm, dirman_passwd):
"""
Check the replication version checking plugin. If it is not
enabled then enable it and restart 389-ds. If it is enabled
the do nothing.
"""
ldap_uri = ipaldap.get_ldap_uri(protocol='ldapi', realm=realm)
conn = ipaldap.LDAPClient(ldap_uri)
if dirman_passwd:
conn.simple_bind(bind_dn=ipaldap.DIRMAN_DN,
bind_password=dirman_passwd)
else:
conn.gssapi_bind()
entry = conn.get_entry(DN(('cn', 'IPA Version Replication'),
('cn', 'plugins'),
('cn', 'config')))
if entry.single_value.get('nsslapd-pluginenabled') == 'off':
conn.modify_s(entry.dn, [(ldap.MOD_REPLACE, 'nsslapd-pluginenabled', 'on')])
conn.unbind()
serverid = "-".join(realm.split("."))
installutils.restart_dirsrv(serverid)
else:
conn.unbind()
def wait_for_task(conn, dn):
"""Check task status
Task is complete when the nsTaskExitCode attr is set.
:return: the task's return code
"""
assert isinstance(dn, DN)
attrlist = [
'nsTaskLog', 'nsTaskStatus', 'nsTaskExitCode', 'nsTaskCurrentItem',
'nsTaskTotalItems']
while True:
entry = conn.get_entry(dn, attrlist)
if entry.single_value.get('nsTaskExitCode'):
exit_code = int(entry.single_value['nsTaskExitCode'])
break
time.sleep(1)
return exit_code
def wait_for_entry(connection, entry, timeout=7200, attr='', quiet=True):
"""Wait for entry and/or attr to show up"""
filter = "(objectclass=*)"
attrlist = []
if attr:
filter = "(%s=*)" % attr
attrlist.append(attr)
timeout += int(time.time())
dn = entry.dn
if not quiet:
sys.stdout.write("Waiting for %s %s:%s " % (connection, dn, attr))
sys.stdout.flush()
entry = None
while not entry and int(time.time()) < timeout:
try:
[entry] = connection.get_entries(
dn, ldap.SCOPE_BASE, filter, attrlist)
except errors.NotFound:
pass # no entry yet
except Exception as e: # badness
print("\nError reading entry", dn, e)
break
if not entry:
if not quiet:
sys.stdout.write(".")
sys.stdout.flush()
time.sleep(1)
if not entry and int(time.time()) > timeout:
print("\nwait_for_entry timeout for %s for %s" % (connection, dn))
elif entry and not quiet:
print("\nThe waited for entry is:", entry)
elif not entry:
print("\nError: could not read entry %s from %s" % (dn, connection))
class ReplicationManager(object):
"""Manage replication agreements between DS servers, and sync
agreements with Windows servers"""
def __init__(self, realm, hostname, dirman_passwd, port=PORT, starttls=False, conn=None):
self.hostname = hostname
self.port = port
self.dirman_passwd = dirman_passwd
self.realm = realm
self.starttls = starttls
self.suffix = ipautil.realm_to_suffix(realm)
self.need_memberof_fixup = False
self.db_suffix = self.suffix
self.agreement_name_format = "meTo%s"
# The caller is allowed to pass in an existing LDAPClient connection.
# Open a new one if not provided
if conn is None:
# If we are passed a password we'll use it as the DM password
# otherwise we'll do a GSSAPI bind.
protocol = 'ldap' if starttls else None
ldap_uri = ipaldap.get_ldap_uri(
hostname, port, protocol=protocol, cacert=CACERT)
self.conn = ipaldap.LDAPClient(ldap_uri, cacert=CACERT,
start_tls=starttls)
if dirman_passwd:
self.conn.simple_bind(bind_dn=ipaldap.DIRMAN_DN,
bind_password=dirman_passwd)
else:
self.conn.gssapi_bind()
else:
self.conn = conn
self.repl_man_passwd = dirman_passwd
# these are likely constant, but you could change them
# at runtime if you really want
self.repl_man_dn = REPL_MAN_DN
self.repl_man_cn = "replication manager"
self.repl_man_group_dn = DN(
REPL_MANAGERS_CN, api.env.container_sysaccounts, api.env.basedn)
def _get_replica_id(self, conn, master_conn):
"""
Returns the replica ID which is unique for each backend.
conn is the connection we are trying to get the replica ID for.
master_conn is the master we are going to replicate with.
"""
# First see if there is already one set
dn = self.replica_dn()
assert isinstance(dn, DN)
try:
replica = conn.get_entry(dn)
except errors.NotFound:
pass
else:
if replica.single_value.get('nsDS5ReplicaId'):
return int(replica.single_value['nsDS5ReplicaId'])
# Ok, either the entry doesn't exist or the attribute isn't set
# so get it from the other master
return self._get_and_update_id_from_master(master_conn)
def _get_and_update_id_from_master(self, master_conn, attempts=5):
"""
Fetch replica ID from remote master and update nsDS5ReplicaId attribute
on 'cn=replication,cn=etc,$SUFFIX' entry. Do it as MOD_DELETE+MOD_ADD
operations and retry when conflict occurs, e.g. due to simultaneous
update from another replica.
:param master_conn: LDAP connection to master
:param attempts: number of attempts to update nsDS5ReplicaId
:return: value of nsDS5ReplicaId before incrementation
"""
dn = DN(('cn','replication'),('cn','etc'), self.suffix)
for a in range(1, attempts + 1):
try:
root_logger.debug('Fetching nsDS5ReplicaId from master '
'[attempt %d/%d]', a, attempts)
replica = master_conn.get_entry(dn)
id_values = replica.get('nsDS5ReplicaId')
if not id_values:
root_logger.debug("Unable to retrieve nsDS5ReplicaId from remote server")
raise RuntimeError("Unable to retrieve nsDS5ReplicaId from remote server")
# nsDS5ReplicaId is single-valued now, but historically it could
# contain multiple values, of which we need the highest.
# see bug: https://fedorahosted.org/freeipa/ticket/3394
retval = max(int(v) for v in id_values)
# Now update the value on the master
mod_list = [(ldap.MOD_DELETE, 'nsDS5ReplicaId', str(retval)),
(ldap.MOD_ADD, 'nsDS5ReplicaId', str(retval + 1))]
master_conn.modify_s(dn, mod_list)
root_logger.debug('Successfully updated nsDS5ReplicaId.')
return retval
except errors.NotFound:
root_logger.debug("Unable to retrieve nsDS5ReplicaId from remote server")
raise
# these errors signal a conflict in updating replica ID.
# We then wait for a random time interval and try again
except (ldap.NO_SUCH_ATTRIBUTE, ldap.OBJECT_CLASS_VIOLATION) as e:
sleep_interval = randint(1, 5)
root_logger.debug("Update failed (%s). Conflicting operation?",
e)
time.sleep(sleep_interval)
# in case of other error we bail out
except ldap.LDAPError as e:
root_logger.debug("Problem updating nsDS5ReplicaID %s" % e)
raise
raise RuntimeError("Failed to update nsDS5ReplicaId in %d attempts"
% attempts)
def get_agreement_filter(self, agreement_types=None, host=None):
"""
Get an LDAP replication agreement filter with a possibility to filter
the agreements by their type and a host
"""
if agreement_types is None:
agreement_types = (IPA_REPLICA, WINSYNC)
elif not isinstance(agreement_types, (list, tuple)):
agreement_types = (agreement_types,)
agreement_types_filters = []
if IPA_REPLICA in agreement_types:
agreement_types_filters.append('(&(objectclass=nsds5ReplicationAgreement)(nsDS5ReplicaRoot=%s))'
% self.db_suffix)
if WINSYNC in agreement_types:
agreement_types_filters.append('(objectclass=nsDSWindowsReplicationAgreement)')
if len(agreement_types_filters) > 1:
agreement_filter = '(|%s)' % ''.join(agreement_types_filters)
else:
agreement_filter = ''.join(agreement_types_filters)
if host is not None:
agreement_filter = '(&%s(nsDS5ReplicaHost=%s))' % (agreement_filter, host)
return agreement_filter
def find_replication_agreements(self):
"""
The replication agreements are stored in
cn="$SUFFIX",cn=mapping tree,cn=config
FIXME: Rather than failing with a read error if a user tries
to read this it simply returns zero entries. We need to use
GER to determine if we are allowed to read this to return a proper
response. For now just return "No entries" even if the user may
not be allowed to see them.
"""
filt = self.get_agreement_filter()
try:
ents = self.conn.get_entries(
DN(('cn', 'mapping tree'), ('cn', 'config')),
ldap.SCOPE_SUBTREE, filt)
except errors.NotFound:
ents = []
return ents
def find_ipa_replication_agreements(self):
"""
The replication agreements are stored in
cn="$SUFFIX",cn=mapping tree,cn=config
Return the list of hosts we have replication agreements.
"""
filt = self.get_agreement_filter(IPA_REPLICA)
try:
ents = self.conn.get_entries(
DN(('cn', 'mapping tree'), ('cn', 'config')),
ldap.SCOPE_SUBTREE, filt)
except errors.NotFound:
ents = []
return ents
def get_replication_agreement(self, hostname):
"""
The replication agreements are stored in
cn="$SUFFIX",cn=mapping tree,cn=config
Get the replication agreement for a specific host.
Returns None if not found.
"""
filt = self.get_agreement_filter(host=hostname)
try:
entries = self.conn.get_entries(
DN(('cn', 'mapping tree'), ('cn', 'config')),
ldap.SCOPE_SUBTREE, filt)
except errors.NotFound:
return None
if len(entries) == 0:
return None
else:
return entries[0] # There can be only one
def add_replication_manager(self, conn, dn, pw):
"""
Create a pseudo user to use for replication.
"""
assert isinstance(dn, DN)
rdn_attr = dn[0].attr
rdn_val = dn[0].value
ent = conn.make_entry(
dn,
{
'objectclass': ["top", "person"],
rdn_attr: [rdn_val],
'userpassword': [pw],
'sn': ["replication manager pseudo user"],
}
)
try:
conn.add_entry(ent)
except errors.DuplicateEntry:
conn.modify_s(dn, [(ldap.MOD_REPLACE, "userpassword", pw)])
def delete_replication_manager(self, conn, dn=REPL_MAN_DN):
assert isinstance(dn, DN)
try:
conn.delete_entry(dn)
except errors.NotFound:
pass
def get_replica_type(self, master=True):
if master:
return "3"
else:
return "2"
def replica_dn(self):
return DN(('cn', 'replica'), ('cn', self.db_suffix),
('cn', 'mapping tree'), ('cn', 'config'))
def replica_config(self, conn, replica_id, replica_binddn):
assert isinstance(replica_binddn, DN)
dn = self.replica_dn()
assert isinstance(dn, DN)
try:
entry = conn.get_entry(dn)
managers = {DN(m) for m in entry.get('nsDS5ReplicaBindDN', [])}
binddn_groups = {
DN(p) for p in entry.get('nsds5replicabinddngroup', [])}
mod = []
if replica_binddn not in managers:
# Add the new replication manager
mod.append((ldap.MOD_ADD, 'nsDS5ReplicaBindDN',
replica_binddn))
if self.repl_man_group_dn not in binddn_groups:
mod.append((ldap.MOD_ADD, 'nsds5replicabinddngroup',
self.repl_man_group_dn))
if mod:
conn.modify_s(dn, mod)
# replication is already configured
return
except errors.NotFound:
pass
replica_type = self.get_replica_type()
entry = conn.make_entry(
dn,
objectclass=["top", "nsds5replica", "extensibleobject"],
cn=["replica"],
nsds5replicaroot=[str(self.db_suffix)],
nsds5replicaid=[str(replica_id)],
nsds5replicatype=[replica_type],
nsds5flags=["1"],
nsds5replicabinddn=[replica_binddn],
nsds5replicabinddngroup=[self.repl_man_group_dn],
nsds5replicabinddngroupcheckinterval=["60"],
nsds5replicalegacyconsumer=["off"],
)
conn.add_entry(entry)
def setup_changelog(self, conn):
ent = conn.get_entry(
DN(
('cn', 'config'), ('cn', 'ldbm database'),
('cn', 'plugins'), ('cn', 'config')),
['nsslapd-directory'])
dbdir = os.path.dirname(ent.single_value.get('nsslapd-directory'))
entry = conn.make_entry(
DN(('cn', 'changelog5'), ('cn', 'config')),
{
'objectclass': ["top", "extensibleobject"],
'cn': ["changelog5"],
'nsslapd-changelogdir': [os.path.join(dbdir, "cldb")],
'nsslapd-changelogmaxage': ['7d'],
}
)
try:
conn.add_entry(entry)
except errors.DuplicateEntry:
return
def setup_chaining_backend(self, conn):
chaindn = DN(('cn', 'chaining database'), ('cn', 'plugins'), ('cn', 'config'))
benamebase = "chaindb"
urls = [conn.ldap_uri]
cn = ""
benum = 1
done = False
while not done:
try:
cn = benamebase + str(benum) # e.g. localdb1
dn = DN(('cn', cn), chaindn)
entry = conn.make_entry(
dn,
{
'objectclass': [
'top', 'extensibleObject', 'nsBackendInstance'],
'cn': [cn],
'nsslapd-suffix': [str(self.db_suffix)],
'nsfarmserverurl': urls,
'nsmultiplexorbinddn': [self.repl_man_dn],
'nsmultiplexorcredentials': [self.repl_man_passwd],
}
)
self.conn.add_entry(entry)
done = True
except errors.DuplicateEntry:
benum += 1
except errors.ExecutionError as e:
print("Could not add backend entry " + dn, e)
raise
return cn
def setup_chaining_farm(self, conn):
try:
conn.modify_s(self.db_suffix, [(ldap.MOD_ADD, 'aci',
[ "(targetattr = \"*\")(version 3.0; acl \"Proxied authorization for database links\"; allow (proxy) userdn = \"ldap:///%s\";)" % self.repl_man_dn ])])
except ldap.TYPE_OR_VALUE_EXISTS:
root_logger.debug("proxy aci already exists in suffix %s on %s"
% (self.db_suffix, conn.ldap_uri))
def get_mapping_tree_entry(self):
try:
entries = self.conn.get_entries(
DN(('cn', 'mapping tree'), ('cn', 'config')),
ldap.SCOPE_ONELEVEL,
"(cn=\"%s\")" % (self.db_suffix))
# TODO: Check we got only one entry
return entries[0]
except errors.NotFound:
root_logger.debug(
"failed to find mapping tree entry for %s", self.db_suffix)
raise
def enable_chain_on_update(self, bename):
mtent = self.get_mapping_tree_entry()
dn = mtent.dn
plgent = self.conn.get_entry(
DN(('cn', 'Multimaster Replication Plugin'), ('cn', 'plugins'),
('cn', 'config')),
['nsslapd-pluginPath'])
path = plgent.single_value.get('nsslapd-pluginPath')
mod = [(ldap.MOD_REPLACE, 'nsslapd-state', 'backend'),
(ldap.MOD_ADD, 'nsslapd-backend', bename),
(ldap.MOD_ADD, 'nsslapd-distribution-plugin', path),
(ldap.MOD_ADD, 'nsslapd-distribution-funct', 'repl_chain_on_update')]
try:
self.conn.modify_s(dn, mod)
except ldap.TYPE_OR_VALUE_EXISTS:
root_logger.debug("chainOnUpdate already enabled for %s"
% self.db_suffix)
def setup_chain_on_update(self, other_conn):
chainbe = self.setup_chaining_backend(other_conn)
self.enable_chain_on_update(chainbe)
def add_passsync_user(self, conn, password):
pass_dn = DN(('uid', 'passsync'), ('cn', 'sysaccounts'), ('cn', 'etc'), self.suffix)
print("The user for the Windows PassSync service is %s" % pass_dn)
try:
conn.get_entry(pass_dn)
print("Windows PassSync system account exists, not resetting password")
except errors.NotFound:
# The user doesn't exist, add it
print("Adding Windows PassSync system account")
entry = conn.make_entry(
pass_dn,
objectclass=["account", "simplesecurityobject", "inetUser"],
uid=["passsync"],
userPassword=[password],
)
conn.add_entry(entry)
# Add the user to the list of users allowed to bypass password policy
extop_dn = DN(('cn', 'ipa_pwd_extop'), ('cn', 'plugins'), ('cn', 'config'))
entry = conn.get_entry(extop_dn)
pass_mgrs = entry.get('passSyncManagersDNs', [])
pass_mgrs.append(pass_dn)
mod = [(ldap.MOD_REPLACE, 'passSyncManagersDNs', pass_mgrs)]
try:
conn.modify_s(extop_dn, mod)
except ldap.TYPE_OR_VALUE_EXISTS:
root_logger.debug("Plugin '%s' already '%s' in passSyncManagersDNs",
extop_dn, pass_dn)
# And finally add it is a member of PassSync privilege to allow
# displaying user NT attributes and reset passwords
passsync_privilege_dn = DN(('cn','PassSync Service'),
api.env.container_privilege,
api.env.basedn)
members = entry.get('member', [])
members.append(pass_dn)
mod = [(ldap.MOD_REPLACE, 'member', members)]
try:
conn.modify_s(passsync_privilege_dn, mod)
except ldap.TYPE_OR_VALUE_EXISTS:
root_logger.debug("PassSync service '%s' already have '%s' as member",
passsync_privilege_dn, pass_dn)
def setup_winsync_agmt(self, entry, win_subtree=None):
if win_subtree is None:
win_subtree = DN(WIN_USER_CONTAINER, self.ad_suffix)
ds_subtree = DN(IPA_USER_CONTAINER, self.suffix)
windomain = ipautil.suffix_to_realm(self.suffix)
entry["objectclass"] = ["nsDSWindowsReplicationAgreement"]
entry["nsds7WindowsReplicaSubtree"] = [win_subtree]
entry["nsds7DirectoryReplicaSubtree"] = [ds_subtree]
# for now, just sync users and ignore groups
entry["nsds7NewWinUserSyncEnabled"] = ['true']
entry["nsds7NewWinGroupSyncEnabled"] = ['false']
entry["nsds7WindowsDomain"] = [windomain]
def agreement_dn(self, hostname, master=None):
"""
IPA agreement use the same dn on both sides, dogtag does not.
master is not used for IPA agreements but for dogtag it will
tell which side we want.
"""
cn = self.agreement_name_format % (hostname)
dn = DN(('cn', cn), self.replica_dn())
return (cn, dn)
def setup_agreement(self, a_conn, b_hostname, port=389,
repl_man_dn=None, repl_man_passwd=None,
iswinsync=False, win_subtree=None, isgssapi=False,
master=None):
"""
master is used to determine which side of the agreement we are
creating. This is only needed for dogtag replication agreements
which use a different name on each side. If master is None then
isn't a dogtag replication agreement.
"""
if repl_man_dn is not None:
assert isinstance(repl_man_dn, DN)
cn, dn = self.agreement_dn(b_hostname, master=master)
try:
a_conn.get_entry(dn)
return
except errors.NotFound:
pass
entry = a_conn.make_entry(
dn,
objectclass=["nsds5replicationagreement"],
cn=[cn],
nsds5replicahost=[b_hostname],
nsds5replicaport=[str(port)],
nsds5replicatimeout=[str(TIMEOUT)],
nsds5replicaroot=[str(self.db_suffix)],
description=["me to %s" % b_hostname],
)
if master is None:
entry['nsDS5ReplicatedAttributeList'] = [
'(objectclass=*) $ EXCLUDE %s' % " ".join(EXCLUDES)]
if isgssapi:
entry['nsds5replicatransportinfo'] = ['LDAP']
entry['nsds5replicabindmethod'] = ['SASL/GSSAPI']
else:
entry['nsds5replicabinddn'] = [repl_man_dn]
entry['nsds5replicacredentials'] = [repl_man_passwd]
entry['nsds5replicatransportinfo'] = ['TLS']
entry['nsds5replicabindmethod'] = ['simple']
if iswinsync:
self.setup_winsync_agmt(entry, win_subtree)
else:
entry['nsds5ReplicaStripAttrs'] = [" ".join(STRIP_ATTRS)]
a_conn.add_entry(entry)
try:
mod = [(ldap.MOD_ADD, 'nsDS5ReplicatedAttributeListTotal',
'(objectclass=*) $ EXCLUDE %s' % " ".join(TOTAL_EXCLUDES))]
a_conn.modify_s(dn, mod)
except ldap.LDAPError:
# Apparently there are problems set the total list
# Probably the master is an old 389-ds server, tell the caller
# that we will have to set the memberof fixup task
self.need_memberof_fixup = True
wait_for_entry(a_conn, entry)
def needs_memberof_fixup(self):
return self.need_memberof_fixup
def get_replica_principal_dns(self, a, b, retries):
"""
Get the DNs of the ldap principals we are going to convert
to using GSSAPI replication.
Arguments a and b are LDAP connections. retries is the number
of attempts that should be made to find the entries. It could
be that replication is slow.
If successful this returns a tuple (dn_a, dn_b).
If either of the DNs doesn't exist after the retries are
exhausted an exception is raised.
"""
filter_a = '(krbprincipalname=ldap/%s@%s)' % (a.host, self.realm)
filter_b = '(krbprincipalname=ldap/%s@%s)' % (b.host, self.realm)
a_entry = None
b_entry = None
error_message = ''
while (retries > 0 ):
root_logger.info('Getting ldap service principals for conversion: %s and %s' % (filter_a, filter_b))
try:
a_entry = b.get_entries(self.suffix, ldap.SCOPE_SUBTREE,
filter=filter_a)
except errors.NotFound:
pass
try:
b_entry = a.get_entries(self.suffix, ldap.SCOPE_SUBTREE,
filter=filter_b)
except errors.NotFound:
pass
if a_entry and b_entry:
root_logger.debug('Found both principals.')
break
# One or both is missing, force sync again
if not a_entry:
root_logger.debug('Unable to find entry for %s on %s'
% (filter_a, str(b)))
self.force_sync(a, b.host)
_cn, dn = self.agreement_dn(b.host)
_haserror, error_message = self.wait_for_repl_update(a, dn, 60)
if not b_entry:
root_logger.debug('Unable to find entry for %s on %s'
% (filter_b, str(a)))
self.force_sync(b, a.host)
_cn, dn = self.agreement_dn(a.host)
_haserror, error_message = self.wait_for_repl_update(b, dn, 60)
retries -= 1
if not a_entry or not b_entry:
error = 'One of the ldap service principals is missing. ' \
'Replication agreement cannot be converted.'
if error_message:
error += '\nReplication error message: %s' % error_message
raise RuntimeError(error)
return (a_entry[0].dn, b_entry[0].dn)
def setup_krb_princs_as_replica_binddns(self, a, b):
"""
Search the appropriate principal names so we can get
the correct DNs to store in the replication agreements.
Then modify the replica object to allow these DNs to act
as replication agents.
"""
rep_dn = self.replica_dn()
group_dn = DN(('cn', 'replication managers'), ('cn', 'sysaccounts'),
('cn', 'etc'), self.suffix)
assert isinstance(rep_dn, DN)
(a_dn, b_dn) = self.get_replica_principal_dns(a, b, retries=100)
assert isinstance(a_dn, DN)
assert isinstance(b_dn, DN)
# Add kerberos principal DNs as valid bindDNs for replication
try:
mod = [(ldap.MOD_ADD, "nsds5replicabinddn", b_dn)]
a.modify_s(rep_dn, mod)
except ldap.TYPE_OR_VALUE_EXISTS:
pass
try:
mod = [(ldap.MOD_ADD, "nsds5replicabinddn", a_dn)]
b.modify_s(rep_dn, mod)
except ldap.TYPE_OR_VALUE_EXISTS:
pass
# Add kerberos principal DNs as valid bindDNs to bindDN group
try:
mod = [(ldap.MOD_ADD, "member", b_dn)]
a.modify_s(group_dn, mod)
except (ldap.TYPE_OR_VALUE_EXISTS, ldap.NO_SUCH_OBJECT):
pass
try:
mod = [(ldap.MOD_ADD, "member", a_dn)]
b.modify_s(group_dn, mod)
except (ldap.TYPE_OR_VALUE_EXISTS, ldap.NO_SUCH_OBJECT):
pass
def gssapi_update_agreements(self, a, b):
self.setup_krb_princs_as_replica_binddns(a, b)
#change replication agreements to connect to other host using GSSAPI
mod = [(ldap.MOD_REPLACE, "nsds5replicatransportinfo", "LDAP"),
(ldap.MOD_REPLACE, "nsds5replicabindmethod", "SASL/GSSAPI"),
(ldap.MOD_DELETE, "nsds5replicabinddn", None),
(ldap.MOD_DELETE, "nsds5replicacredentials", None)]
_cn, a_ag_dn = self.agreement_dn(b.host)
a.modify_s(a_ag_dn, mod)
_cn, b_ag_dn = self.agreement_dn(a.host)
b.modify_s(b_ag_dn, mod)
# Finally remove the temporary replication manager user
try:
a.delete_entry(self.repl_man_dn)
except errors.NotFound:
pass
try:
b.delete_entry(self.repl_man_dn)
except errors.NotFound:
pass
def delete_agreement(self, hostname, dn=None):
"""
Delete a replication agreement.
@hostname: the hostname of the agreement to remove
@dn: optional dn of the agreement to remove
For IPA agreements we can easily calculate the DN of the agreement
to remove. Dogtag agreements are another matter, its agreement
names depend entirely on where it is created. In this case it is
better to pass the DN in directly.
"""
if dn is None:
_cn, dn = self.agreement_dn(hostname)
return self.conn.delete_entry(dn)
def delete_referral(self, hostname):
dn = DN(('cn', self.db_suffix),
('cn', 'mapping tree'), ('cn', 'config'))
# TODO: should we detect proto/port somehow ?
mod = [(ldap.MOD_DELETE, 'nsslapd-referral',
'ldap://%s/%s' % (ipautil.format_netloc(hostname, 389),
self.db_suffix))]
try:
self.conn.modify_s(dn, mod)
except Exception as e:
root_logger.debug("Failed to remove referral value: %s" % str(e))
def check_repl_init(self, conn, agmtdn, start):
done = False
hasError = 0
attrlist = ['cn', 'nsds5BeginReplicaRefresh',
'nsds5replicaUpdateInProgress',
'nsds5ReplicaLastInitStatus',
'nsds5ReplicaLastInitStart',
'nsds5ReplicaLastInitEnd']
entry = conn.get_entry(agmtdn, attrlist)
if not entry:
print("Error reading status from agreement", agmtdn)
hasError = 1
else:
refresh = entry.single_value.get('nsds5BeginReplicaRefresh')
inprogress = entry.single_value.get('nsds5replicaUpdateInProgress')
status = entry.single_value.get('nsds5ReplicaLastInitStatus')
if not refresh: # done - check status
if not status:
print("No status yet")
elif status.find("replica busy") > -1:
print("[%s] reports: Replica Busy! Status: [%s]"
% (conn.ldap_uri, status))
done = True
hasError = 2
elif status.find("Total update succeeded") > -1:
print("\nUpdate succeeded")
done = True
elif inprogress.lower() == 'true':
print("\nUpdate in progress yet not in progress")
else:
print("\n[%s] reports: Update failed! Status: [%s]"
% (conn.ldap_uri, status))
hasError = 1
done = True
else:
now = datetime.datetime.now()
d = now - start
sys.stdout.write('\r')
sys.stdout.write("Update in progress, %d seconds elapsed" % int(d.total_seconds()))
sys.stdout.flush()
return done, hasError
def check_repl_update(self, conn, agmtdn):
done = False
hasError = 0
error_message = ''
attrlist = ['cn', 'nsds5replicaUpdateInProgress',
'nsds5ReplicaLastUpdateStatus', 'nsds5ReplicaLastUpdateStart',
'nsds5ReplicaLastUpdateEnd']
entry = conn.get_entry(agmtdn, attrlist)
if not entry:
print("Error reading status from agreement", agmtdn)
hasError = 1
else:
inprogress = entry.single_value.get('nsds5replicaUpdateInProgress')
status = entry.single_value.get('nsds5ReplicaLastUpdateStatus')
try:
start = int(entry.single_value['nsds5ReplicaLastUpdateStart'])
except (ValueError, TypeError, KeyError):
start = 0
try:
end = int(entry.single_value['nsds5ReplicaLastUpdateEnd'])
except (ValueError, TypeError, KeyError):
end = 0
# incremental update is done if inprogress is false and end >= start
done = inprogress and inprogress.lower() == 'false' and start <= end
root_logger.info("Replication Update in progress: %s: status: %s: start: %d: end: %d" %
(inprogress, status, start, end))
if status: # always check for errors
# status will usually be a number followed by a string
# number != 0 means error
rc, msg = status.split(' ', 1)
if rc != '0':
hasError = 1
error_message = msg
done = True
return done, hasError, error_message
def wait_for_repl_init(self, conn, agmtdn):
done = False
haserror = 0
start = datetime.datetime.now()
while not done and not haserror:
time.sleep(1) # give it a few seconds to get going
done, haserror = self.check_repl_init(conn, agmtdn, start)
print("")
return haserror
def wait_for_repl_update(self, conn, agmtdn, maxtries=600):
done = False
haserror = 0
error_message = ''
while not done and not haserror and maxtries > 0:
time.sleep(1) # give it a few seconds to get going
done, haserror, error_message = self.check_repl_update(conn, agmtdn)
maxtries -= 1
if maxtries == 0: # too many tries
print("Error: timeout: could not determine agreement status: please check your directory server logs for possible errors")
haserror = 1
return haserror, error_message
def start_replication(self, conn, hostname=None, master=None):
print("Starting replication, please wait until this has completed.")
if hostname is None:
hostname = self.hostname
_cn, dn = self.agreement_dn(hostname, master)
mod = [(ldap.MOD_ADD, 'nsds5BeginReplicaRefresh', 'start')]
conn.modify_s(dn, mod)
return self.wait_for_repl_init(conn, dn)
def basic_replication_setup(self, conn, replica_id, repldn, replpw):
assert isinstance(repldn, DN)
if replpw is not None:
self.add_replication_manager(conn, repldn, replpw)
self.replica_config(conn, replica_id, repldn)
self.setup_changelog(conn)
def setup_replication(self, r_hostname, r_port=389, r_sslport=636,
r_binddn=None, r_bindpw=None,
is_cs_replica=False, local_port=None):
assert isinstance(r_binddn, DN)
if local_port is None:
local_port = r_port
# note - there appears to be a bug in python-ldap - it does not
# allow connections using two different CA certs
ldap_uri = ipaldap.get_ldap_uri(r_hostname, r_port, cacert=CACERT,
protocol='ldap')
r_conn = ipaldap.LDAPClient(ldap_uri, cacert=CACERT, start_tls=True)
if r_bindpw:
r_conn.simple_bind(r_binddn, r_bindpw)
else:
r_conn.gssapi_bind()
#Setup the first half
l_id = self._get_replica_id(self.conn, r_conn)
self.basic_replication_setup(self.conn, l_id,
self.repl_man_dn, self.repl_man_passwd)
# Now setup the other half
r_id = self._get_replica_id(r_conn, r_conn)
self.basic_replication_setup(r_conn, r_id,
self.repl_man_dn, self.repl_man_passwd)
if is_cs_replica:
self.setup_agreement(r_conn, self.hostname, port=local_port,
repl_man_dn=self.repl_man_dn,
repl_man_passwd=self.repl_man_passwd,
master=False)
self.setup_agreement(self.conn, r_hostname, port=r_port,
repl_man_dn=self.repl_man_dn,
repl_man_passwd=self.repl_man_passwd,
master=True)
else:
self.setup_agreement(r_conn, self.hostname, port=local_port,
repl_man_dn=self.repl_man_dn,
repl_man_passwd=self.repl_man_passwd)
self.setup_agreement(self.conn, r_hostname, port=r_port,
repl_man_dn=self.repl_man_dn,
repl_man_passwd=self.repl_man_passwd)
#Finally start replication
ret = self.start_replication(r_conn, master=False)
if ret != 0:
raise RuntimeError("Failed to start replication")
def setup_winsync_replication(self,
ad_dc_name, ad_binddn, ad_pwd,
passsync_pw, ad_subtree,
cacert=CACERT):
self.ad_suffix = ""
try:
# Validate AD connection
ad_conn = ldap.initialize('ldap://%s' % ipautil.format_netloc(ad_dc_name))
# the next one is to workaround bugs arounf opendalp libs+NSS db
# we need to first specify the OPT_X_TLS_CACERTFILE and _after_
# that initialize the context to prevent TLS connection errors:
# https://bugzilla.redhat.com/show_bug.cgi?id=800787
ad_conn.set_option(ldap.OPT_X_TLS_CACERTFILE, cacert)
ad_conn.set_option(ldap.OPT_X_TLS_NEWCTX, 0)
ad_conn.start_tls_s()
ad_conn.simple_bind_s(str(ad_binddn), ad_pwd)
res = ad_conn.search_s("", ldap.SCOPE_BASE, '(objectClass=*)',
['defaultNamingContext'])
for dn,entry in res:
if dn == "":
self.ad_suffix = entry['defaultNamingContext'][0]
root_logger.info("AD Suffix is: %s" % self.ad_suffix)
if self.ad_suffix == "":
raise RuntimeError("Failed to lookup AD's Ldap suffix")
ad_conn.unbind_s()
del ad_conn
except Exception as e:
root_logger.info("Failed to connect to AD server %s" % ad_dc_name)
root_logger.info("The error was: %s" % e)
raise RuntimeError("Failed to setup winsync replication")
# Setup the only half.
# there is no other side to get a replica ID from
# So we generate one locally
replica_id = self._get_replica_id(self.conn, self.conn)
self.basic_replication_setup(self.conn, replica_id,
self.repl_man_dn, self.repl_man_passwd)
#now add a passync user allowed to access the AD server
self.add_passsync_user(self.conn, passsync_pw)
self.setup_agreement(self.conn, ad_dc_name,
repl_man_dn=ad_binddn, repl_man_passwd=ad_pwd,
iswinsync=True, win_subtree=ad_subtree)
root_logger.info("Added new sync agreement, waiting for it to become ready . . .")
_cn, dn = self.agreement_dn(ad_dc_name)
self.wait_for_repl_update(self.conn, dn, 300)
root_logger.info("Agreement is ready, starting replication . . .")
# Add winsync replica to the public DIT
dn = DN(('cn',ad_dc_name),('cn','replicas'),('cn','ipa'),('cn','etc'), self.suffix)
entry = self.conn.make_entry(
dn,
objectclass=["nsContainer", "ipaConfigObject"],
cn=[ad_dc_name],
ipaConfigString=["winsync:%s" % self.hostname],
)
try:
self.conn.add_entry(entry)
except Exception as e:
root_logger.info("Failed to create public entry for winsync replica")
#Finally start replication
ret = self.start_replication(self.conn, ad_dc_name)
if ret != 0:
raise RuntimeError("Failed to start replication")
def convert_to_gssapi_replication(self, r_hostname, r_binddn, r_bindpw):
ldap_uri = ipaldap.get_ldap_uri(r_hostname, PORT, cacert=CACERT)
r_conn = ipaldap.LDAPClient(ldap_uri, cacert=CACERT)
if r_bindpw:
r_conn.simple_bind(r_binddn, r_bindpw)
else:
r_conn.gssapi_bind()
# First off make sure servers are in sync so that both KDCs
# have all principals and their passwords and can release
# the right tickets. We do this by force pushing all our changes
self.force_sync(self.conn, r_hostname)
_cn, dn = self.agreement_dn(r_hostname)
self.wait_for_repl_update(self.conn, dn, 300)
# now in the opposite direction
self.force_sync(r_conn, self.hostname)
_cn, dn = self.agreement_dn(self.hostname)
self.wait_for_repl_update(r_conn, dn, 300)
# now that directories are in sync,
# change the agreements to use GSSAPI
self.gssapi_update_agreements(self.conn, r_conn)
def setup_gssapi_replication(self, r_hostname, r_binddn=None, r_bindpw=None):
"""
Directly sets up GSSAPI replication.
Only usable to connect 2 existing replicas (needs existing kerberos
principals)
"""
# note - there appears to be a bug in python-ldap - it does not
# allow connections using two different CA certs
ldap_uri = ipaldap.get_ldap_uri(r_hostname, PORT, cacert=CACERT)
r_conn = ipaldap.LDAPClient(ldap_uri, cacert=CACERT)
if r_bindpw:
r_conn.simple_bind(r_binddn, r_bindpw)
else:
r_conn.gssapi_bind()
# Allow krb principals to act as replicas
self.setup_krb_princs_as_replica_binddns(self.conn, r_conn)
# Create mutual replication agreementsausiung SASL/GSSAPI
self.setup_agreement(self.conn, r_hostname, isgssapi=True)
self.setup_agreement(r_conn, self.hostname, isgssapi=True)
def initialize_replication(self, dn, conn):
mod = [(ldap.MOD_ADD, 'nsds5BeginReplicaRefresh', 'start'),
(ldap.MOD_REPLACE, 'nsds5ReplicaEnabled', 'on')]
try:
conn.modify_s(dn, mod)
except ldap.ALREADY_EXISTS:
return
def force_sync(self, conn, hostname):
newschedule = '2358-2359 0'
filter = self.get_agreement_filter(host=hostname)
try:
entries = conn.get_entries(
DN(('cn', 'config')), ldap.SCOPE_SUBTREE, filter)
except errors.NotFound:
root_logger.error("Unable to find replication agreement for %s" %
(hostname))
raise RuntimeError("Unable to proceed")
if len(entries) > 1:
root_logger.error("Found multiple agreements for %s" % hostname)
root_logger.error("Using the first one only (%s)" % entries[0].dn)
dn = entries[0].dn
schedule = entries[0].single_value.get('nsds5replicaupdateschedule')
# On the remote chance of a match. We force a synch to happen right
# now by setting the schedule to something and quickly removing it.
if schedule is not None:
if newschedule == schedule:
newschedule = '2358-2359 1'
root_logger.info("Setting agreement %s schedule to %s to force synch" %
(dn, newschedule))
mod = [(ldap.MOD_REPLACE, 'nsDS5ReplicaUpdateSchedule', [ newschedule ])]
conn.modify_s(dn, mod)
time.sleep(1)
root_logger.info("Deleting schedule %s from agreement %s" %
(newschedule, dn))
mod = [(ldap.MOD_DELETE, 'nsDS5ReplicaUpdateSchedule', None)]
conn.modify_s(dn, mod)
def get_agreement_type(self, hostname):
entry = self.get_replication_agreement(hostname)
if not entry:
raise errors.NotFound(
reason="Replication agreement for %s not found" % hostname)
objectclass = entry.get("objectclass")
for o in objectclass:
if o.lower() == "nsdswindowsreplicationagreement":
return WINSYNC
return IPA_REPLICA
def replica_cleanup(self, replica, realm, force=False):
"""
This function removes information about the replica in parts
of the shared tree that expose it, so clients stop trying to
use this replica.
"""
err = None
if replica == self.hostname:
raise RuntimeError("Can't cleanup self")
# delete master kerberos key and all its svc principals
try:
entries = self.conn.get_entries(
self.suffix, ldap.SCOPE_SUBTREE,
filter='(krbprincipalname=*/%s@%s)' % (replica, realm))
if entries:
entries.sort(key=lambda x: len(x.dn), reverse=True)
for entry in entries:
self.conn.delete_entry(entry)
except errors.NotFound:
pass
except Exception as e:
if not force:
raise e
else:
err = e
# remove replica memberPrincipal from s4u2proxy configuration
dn1 = DN(('cn', 'ipa-http-delegation'), api.env.container_s4u2proxy, self.suffix)
member_principal1 = "HTTP/%(fqdn)s@%(realm)s" % dict(fqdn=replica, realm=realm)
dn2 = DN(('cn', 'ipa-ldap-delegation-targets'), api.env.container_s4u2proxy, self.suffix)
member_principal2 = "ldap/%(fqdn)s@%(realm)s" % dict(fqdn=replica, realm=realm)
dn3 = DN(('cn', 'ipa-cifs-delegation-targets'), api.env.container_s4u2proxy, self.suffix)
member_principal3 = "cifs/%(fqdn)s@%(realm)s" % dict(fqdn=replica, realm=realm)
for (dn, member_principal) in ((dn1, member_principal1),
(dn2, member_principal2),
(dn3, member_principal3)):
try:
mod = [(ldap.MOD_DELETE, 'memberPrincipal', member_principal)]
self.conn.modify_s(dn, mod)
except (ldap.NO_SUCH_OBJECT, ldap.NO_SUCH_ATTRIBUTE):
root_logger.debug("Replica (%s) memberPrincipal (%s) not found in %s" % \
(replica, member_principal, dn))
except Exception as e:
if not force:
raise e
elif not err:
err = e
# delete master entry with all active services
try:
dn = DN(('cn', replica), ('cn', 'masters'), ('cn', 'ipa'),
('cn', 'etc'), self.suffix)
entries = self.conn.get_entries(dn, ldap.SCOPE_SUBTREE)
if entries:
entries.sort(key=lambda x: len(x.dn), reverse=True)
for entry in entries:
self.conn.delete_entry(entry)
except errors.NotFound:
pass
except Exception as e:
if not force:
raise e
elif not err:
err = e
try:
basedn = DN(('cn', 'etc'), self.suffix)
filter = '(dnaHostname=%s)' % replica
entries = self.conn.get_entries(
basedn, ldap.SCOPE_SUBTREE, filter=filter)
if len(entries) != 0:
for entry in entries:
self.conn.delete_entry(entry)
except errors.NotFound:
pass
except Exception as e:
if not force:
raise e
elif not err:
err = e
# delete DNS server configuration, if any
try:
api.Command.dnsserver_del(unicode(replica))
except errors.NotFound:
pass
except Exception as e:
if not force:
raise e
elif not err:
err = e
try:
dn = DN(('cn', 'default'), ('ou', 'profile'), self.suffix)
ret = self.conn.get_entry(dn)
srvlist = ret.single_value.get('defaultServerList', '')
srvlist = srvlist[0].split()
if replica in srvlist:
srvlist.remove(replica)
attr = ' '.join(srvlist)
mod = [(ldap.MOD_REPLACE, 'defaultServerList', attr)]
self.conn.modify_s(dn, mod)
except errors.NotFound:
pass
except ldap.NO_SUCH_ATTRIBUTE:
pass
except ldap.TYPE_OR_VALUE_EXISTS:
pass
except Exception as e:
if force and err:
raise err #pylint: disable=E0702
else:
raise e
if err:
raise err #pylint: disable=E0702
def set_readonly(self, readonly, critical=False):
"""
Set the database readonly status.
@readonly: boolean for read-only status
@critical: boolean to raise an exception on failure, default False.
"""
dn = DN(('cn', 'userRoot'), ('cn', 'ldbm database'),
('cn', 'plugins'), ('cn', 'config'))
mod = [(ldap.MOD_REPLACE, 'nsslapd-readonly', 'on' if readonly else 'off')]
try:
self.conn.modify_s(dn, mod)
except ldap.INSUFFICIENT_ACCESS as e:
# We can't modify the read-only status on the remote server.
# This usually isn't a show-stopper.
if critical:
raise e
root_logger.debug("No permission to modify replica read-only status, continuing anyway")
def cleanallruv(self, replicaId):
"""
Create a CLEANALLRUV task and monitor it until it has
completed.
"""
root_logger.debug("Creating CLEANALLRUV task for replica id %d" % replicaId)
dn = DN(('cn', 'clean %d' % replicaId), ('cn', 'cleanallruv'),('cn', 'tasks'), ('cn', 'config'))
e = self.conn.make_entry(
dn,
{
'objectclass': ['top', 'extensibleObject'],
'cn': ['clean %d' % replicaId],
'replica-base-dn': [self.db_suffix],
'replica-id': [replicaId],
'replica-force-cleaning': ['yes'],
}
)
try:
self.conn.add_entry(e)
except errors.DuplicateEntry:
print("CLEANALLRUV task for replica id %d already exists." % replicaId)
else:
print("Background task created to clean replication data. This may take a while.")
print("This may be safely interrupted with Ctrl+C")
wait_for_task(self.conn, dn)
def abortcleanallruv(self, replicaId, force=False):
"""
Create a task to abort a CLEANALLRUV operation.
"""
root_logger.debug("Creating task to abort a CLEANALLRUV operation for replica id %d" % replicaId)
dn = DN(('cn', 'abort %d' % replicaId), ('cn', 'abort cleanallruv'),('cn', 'tasks'), ('cn', 'config'))
e = self.conn.make_entry(
dn,
{
'replica-base-dn': [api.env.basedn],
'replica-id': [replicaId],
'objectclass': ['top', 'extensibleObject'],
'cn': ['abort %d' % replicaId],
'replica-certify-all': ['no'] if force else ['yes'],
}
)
try:
self.conn.add_entry(e)
except errors.DuplicateEntry:
print("An abort CLEANALLRUV task for replica id %d already exists." % replicaId)
else:
print("Background task created. This may take a while.")
print("This may be safely interrupted with Ctrl+C")
wait_for_task(self.conn, dn)
def get_DNA_range(self, hostname):
"""
Return the DNA range on this server as a tuple, (next, max), or
(None, None) if no range has been assigned yet.
Raises an exception on errors reading an entry.
"""
entry = self.conn.get_entry(DNA_DN)
nextvalue = int(entry.single_value.get("dnaNextValue", 0))
maxvalue = int(entry.single_value.get("dnaMaxValue", 0))
sharedcfgdn = entry.single_value.get("dnaSharedCfgDN")
if sharedcfgdn is not None:
sharedcfgdn = DN(sharedcfgdn)
shared_entry = self.conn.get_entry(sharedcfgdn)
remaining = int(shared_entry.single_value.get("dnaRemainingValues", 0))
else:
remaining = 0
if nextvalue == 0 and maxvalue == 0:
return (None, None)
# Check the magic values for an unconfigured DNA entry
if maxvalue == 1100 and nextvalue == 1101 and remaining == 0:
return (None, None)
else:
return (nextvalue, maxvalue)
def get_DNA_next_range(self, hostname):
"""
Return the DNA "on-deck" range on this server as a tuple, (next, max),
or
(None, None) if no range has been assigned yet.
Raises an exception on errors reading an entry.
"""
entry = self.conn.get_entry(DNA_DN)
range = entry.single_value.get("dnaNextRange")
if range is None:
return (None, None)
try:
(next, max) = range.split('-')
except ValueError:
# Should not happen, malformed entry, return nothing.
return (None, None)
return (int(next), int(max))
def save_DNA_next_range(self, next_start, next_max):
"""
Save a DNA range into the on-deck value.
This adds a dnaNextRange value to the DNA configuration. This
attribute takes the form of start-next.
Returns True on success.
Returns False if the range is already defined.
Raises an exception on failure.
"""
entry = self.conn.get_entry(DNA_DN)
range = entry.single_value.get("dnaNextRange")
if range is not None and next_start != 0 and next_max != 0:
return False
if next_start == 0 and next_max == 0:
entry["dnaNextRange"] = None
else:
entry["dnaNextRange"] = "%s-%s" % (next_start, next_max)
self.conn.update_entry(entry)
return True
def save_DNA_range(self, next_start, next_max):
"""
Save a DNA range.
This is potentially very dangerous.
Returns True on success. Raises an exception on failure.
"""
entry = self.conn.get_entry(DNA_DN)
entry["dnaNextValue"] = next_start
entry["dnaMaxValue"] = next_max
self.conn.update_entry(entry)
return True
def disable_agreement(self, hostname):
"""
Disable the replication agreement to hostname.
"""
entry = self.get_replication_agreement(hostname)
entry['nsds5ReplicaEnabled'] = 'off'
try:
self.conn.update_entry(entry)
except errors.EmptyModlist:
pass
def enable_agreement(self, hostname):
"""
Enable the replication agreement to hostname.
Note: for replication to work it needs to be enabled both ways.
"""
entry = self.get_replication_agreement(hostname)
entry['nsds5ReplicaEnabled'] = 'on'
try:
self.conn.update_entry(entry)
except errors.EmptyModlist:
pass
def join_replication_managers(self, conn):
"""
Create a pseudo user to use for replication.
"""
dn = DN(('cn', 'replication managers'), ('cn', 'sysaccounts'),
('cn', 'etc'), self.suffix)
mydn = DN(('krbprincipalname', 'ldap/%s@%s' % (self.hostname,
self.realm)),
('cn', 'services'), ('cn', 'accounts'), self.suffix)
entry = conn.get_entry(dn)
if mydn not in entry['member']:
entry['member'].append(mydn)
try:
conn.update_entry(entry)
except errors.EmptyModlist:
pass
def add_temp_sasl_mapping(self, conn, r_hostname):
"""
Create a special user to let SASL Mapping find a valid user
on first replication.
"""
name = 'ldap/%s@%s' % (r_hostname, self.realm)
replica_binddn = DN(('cn', name), ('cn', 'config'))
entry = conn.make_entry(
replica_binddn,
objectclass=["top", "person"],
cn=[name],
sn=["replication manager pseudo user"]
)
conn.add_entry(entry)
entry = conn.get_entry(self.replica_dn())
entry['nsDS5ReplicaBindDN'].append(replica_binddn)
conn.update_entry(entry)
entry = conn.make_entry(
DN(('cn', 'Peer Master'), ('cn', 'mapping'), ('cn', 'sasl'),
('cn', 'config')),
objectclass=["top", "nsSaslMapping"],
cn=["Peer Master"],
nsSaslMapRegexString=['^[^:@]+$'],
nsSaslMapBaseDNTemplate=[DN(('cn', 'config'))],
nsSaslMapFilterTemplate=['(cn=&@%s)' % self.realm],
nsSaslMapPriority=['1'],
)
conn.add_entry(entry)
def remove_temp_replication_user(self, conn, r_hostname):
"""
Remove the special SASL Mapping user created in a previous step.
"""
name = 'ldap/%s@%s' % (r_hostname, self.realm)
replica_binddn = DN(('cn', name), ('cn', 'config'))
conn.delete_entry(replica_binddn)
entry = conn.get_entry(self.replica_dn())
while replica_binddn in entry['nsDS5ReplicaBindDN']:
entry['nsDS5ReplicaBindDN'].remove(replica_binddn)
conn.update_entry(entry)
def setup_promote_replication(self, r_hostname, r_binddn=None,
r_bindpw=None, cacert=CACERT):
# note - there appears to be a bug in python-ldap - it does not
# allow connections using two different CA certs
ldap_uri = ipaldap.get_ldap_uri(r_hostname)
r_conn = ipaldap.LDAPClient(ldap_uri, cacert=cacert)
if r_bindpw:
r_conn.simple_bind(r_binddn, r_bindpw)
else:
r_conn.gssapi_bind()
# Setup the first half
l_id = self._get_replica_id(self.conn, r_conn)
self.basic_replication_setup(self.conn, l_id, self.repl_man_dn, None)
self.add_temp_sasl_mapping(self.conn, r_hostname)
# Now setup the other half
r_id = self._get_replica_id(r_conn, r_conn)
self.basic_replication_setup(r_conn, r_id, self.repl_man_dn, None)
self.join_replication_managers(r_conn)
self.setup_agreement(r_conn, self.hostname, isgssapi=True)
self.setup_agreement(self.conn, r_hostname, isgssapi=True)
# Finally start replication
ret = self.start_replication(r_conn, master=False)
if ret != 0:
raise RuntimeError("Failed to start replication")
self.remove_temp_replication_user(self.conn, r_hostname)
class CSReplicationManager(ReplicationManager):
"""ReplicationManager specific to CA agreements
Note that in most cases we don't know if we're connecting to an old-style
separate PKI DS, or to a host with a merged DB.
Use the get_cs_replication_manager function to determine this and return
an appropriate CSReplicationManager.
"""
def __init__(self, realm, hostname, dirman_passwd, port):
super(CSReplicationManager, self).__init__(
realm, hostname, dirman_passwd, port, starttls=True)
self.db_suffix = DN(('o', 'ipaca'))
self.hostnames = [] # set before calling or agreement_dn() will fail
def agreement_dn(self, hostname, master=None):
"""
Construct a dogtag replication agreement name. This needs to be much
more agressive than the IPA replication agreements because the name
is different on each side.
hostname is the local hostname, not the remote one, for both sides
NOTE: The agreement number is hardcoded in dogtag as well
TODO: configurable instance name
"""
dn = None
cn = None
if self.conn.port == 7389:
instance_name = 'pki-ca'
else:
instance_name = 'pki-tomcat'
# if master is not None we know what dn to return:
if master is not None:
if master is True:
name = "master"
else:
name = "clone"
cn="%sAgreement1-%s-%s" % (name, hostname, instance_name)
dn = DN(('cn', cn), self.replica_dn())
return (cn, dn)
for host in self.hostnames:
for master in ["master", "clone"]:
try:
cn="%sAgreement1-%s-%s" % (master, host, instance_name)
dn = DN(('cn', cn), self.replica_dn())
self.conn.get_entry(dn)
return (cn, dn)
except errors.NotFound:
dn = None
cn = None
raise errors.NotFound(reason='No agreement found for %s' % hostname)
def delete_referral(self, hostname, port):
dn = DN(('cn', self.db_suffix),
('cn', 'mapping tree'), ('cn', 'config'))
entry = self.conn.get_entry(dn)
try:
# TODO: should we detect proto somehow ?
entry['nsslapd-referral'].remove(
'ldap://%s/%s' %
(ipautil.format_netloc(hostname, port), self.db_suffix))
self.conn.update_entry(entry)
except Exception as e:
root_logger.debug("Failed to remove referral value: %s" % e)
def has_ipaca(self):
try:
self.conn.get_entry(self.db_suffix)
except errors.NotFound:
return False
else:
return True
def get_cs_replication_manager(realm, host, dirman_passwd):
"""Get a CSReplicationManager for a remote host
Detects if the host has a merged database, connects to appropriate port.
"""
# Try merged database port first. If it has the ipaca tree, return
# corresponding replication manager
# If we can't connect to it at all, we're not dealing with an IPA master
# anyway; let the exception propagate up
# Fall back to the old PKI-only DS port. Check that it has the ipaca tree
# (IPA with merged DB theoretically leaves port 7389 free for anyone).
# If it doesn't, raise exception.
ports = [389, 7389]
for port in ports:
root_logger.debug('Looking for PKI DS on %s:%s' % (host, port))
replication_manager = CSReplicationManager(
realm, host, dirman_passwd, port)
if replication_manager.has_ipaca():
root_logger.debug('PKI DS found on %s:%s' % (host, port))
return replication_manager
else:
root_logger.debug('PKI tree not found on %s:%s' % (host, port))
raise errors.NotFound(reason='Cannot reach PKI DS at %s on ports %s' % (host, ports))
class CAReplicationManager(ReplicationManager):
"""ReplicationManager specific to CA agreements for domain level 1 and
above servers.
"""
def __init__(self, realm, hostname):
# Always connect to self over ldapi
ldap_uri = ipaldap.get_ldap_uri(protocol='ldapi', realm=realm)
conn = ipaldap.LDAPClient(ldap_uri)
conn.external_bind()
super(CAReplicationManager, self).__init__(
realm, hostname, None, port=DEFAULT_PORT, conn=conn)
self.db_suffix = DN(('o', 'ipaca'))
self.agreement_name_format = "caTo%s"
def setup_cs_replication(self, r_hostname):
"""
Assumes a promote replica with working GSSAPI for replication
and unified DS instance.
"""
ldap_uri = ipaldap.get_ldap_uri(r_hostname)
r_conn = ipaldap.LDAPClient(ldap_uri)
r_conn.gssapi_bind()
# Setup the first half
l_id = self._get_replica_id(self.conn, r_conn)
self.basic_replication_setup(self.conn, l_id, self.repl_man_dn, None)
# Now setup the other half
r_id = self._get_replica_id(r_conn, r_conn)
self.basic_replication_setup(r_conn, r_id, self.repl_man_dn, None)
self.setup_agreement(r_conn, self.hostname, isgssapi=True)
self.setup_agreement(self.conn, r_hostname, isgssapi=True)
# Finally start replication
ret = self.start_replication(r_conn, master=False)
if ret != 0:
raise RuntimeError("Failed to start replication")
def run_server_del_as_cli(api_instance, hostname, **options):
"""
run server_del API command and print the result to stdout/stderr using
textui backend.
:params api_instance: API instance
:params hostname: server FQDN
:params options: options for server_del command
"""
server_del_cmd = api_instance.Command.server_del
if 'version' not in options:
options['version'] = api_instance.env.api_version
result = server_del_cmd(hostname, **options)
textui_backend = textui(api_instance)
server_del_cmd.output_for_cli(textui_backend, result, hostname, **options)