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8780751330
Much of this is formatting to make pylint happy but it also fixes some real bugs.
538 lines
21 KiB
Python
538 lines
21 KiB
Python
# Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
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#
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# Copyright (C) 2007 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; version 2 only
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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import time, logging
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import ldap
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from ipaserver.install import dsinstance
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from ipaserver import ipaldap
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from ldap import modlist
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from ipalib import util
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from ipalib import errors
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DIRMAN_CN = "cn=directory manager"
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CACERT = "/usr/share/ipa/html/ca.crt"
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# the default container used by AD for user entries
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WIN_USER_CONTAINER = "cn=Users"
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# the default container used by IPA for user entries
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IPA_USER_CONTAINER = "cn=users,cn=accounts"
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PORT = 636
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TIMEOUT = 120
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IPA_REPLICA = 1
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WINSYNC = 2
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class ReplicationManager:
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"""Manage replication agreements between DS servers, and sync
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agreements with Windows servers"""
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def __init__(self, hostname, dirman_passwd):
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self.hostname = hostname
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self.dirman_passwd = dirman_passwd
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self.conn = ipaldap.IPAdmin(hostname, port=PORT, cacert=CACERT)
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self.conn.do_simple_bind(bindpw=dirman_passwd)
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self.repl_man_passwd = dirman_passwd
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# these are likely constant, but you could change them
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# at runtime if you really want
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self.repl_man_dn = "cn=replication manager,cn=config"
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self.repl_man_cn = "replication manager"
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self.suffix = ""
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def _get_replica_id(self, conn, master_conn):
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"""
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Returns the replica ID which is unique for each backend.
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conn is the connection we are trying to get the replica ID for.
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master_conn is the master we are going to replicate with.
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"""
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# First see if there is already one set
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dn = self.replica_dn()
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try:
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replica = conn.search_s(dn, ldap.SCOPE_BASE, "objectclass=*")[0]
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if replica.getValue('nsDS5ReplicaId'):
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return int(replica.getValue('nsDS5ReplicaId'))
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except ldap.NO_SUCH_OBJECT:
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pass
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# Ok, either the entry doesn't exist or the attribute isn't set
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# so get it from the other master
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retval = -1
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dn = "cn=replication, cn=etc, %s" % self.suffix
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try:
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replica = master_conn.search_s(dn, ldap.SCOPE_BASE, "objectclass=*")[0]
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if not replica.getValue('nsDS5ReplicaId'):
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logging.debug("Unable to retrieve nsDS5ReplicaId from remote server")
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raise RuntimeError("Unable to retrieve nsDS5ReplicaId from remote server")
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except ldap.NO_SUCH_OBJECT:
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logging.debug("Unable to retrieve nsDS5ReplicaId from remote server")
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raise
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# Now update the value on the master
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retval = int(replica.getValue('nsDS5ReplicaId'))
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mod = [(ldap.MOD_REPLACE, 'nsDS5ReplicaId', str(retval + 1))]
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try:
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master_conn.modify_s(dn, mod)
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except Exception, e:
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logging.debug("Problem updating nsDS5ReplicaID %s" % e)
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raise
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return retval
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def find_replication_dns(self, conn):
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filt = "(|(objectclass=nsDSWindowsReplicationAgreement)(objectclass=nsds5ReplicationAgreement))"
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try:
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ents = conn.search_s("cn=mapping tree,cn=config", ldap.SCOPE_SUBTREE, filt)
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except ldap.NO_SUCH_OBJECT:
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return []
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return [ent.dn for ent in ents]
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def add_replication_manager(self, conn, passwd=None):
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"""
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Create a pseudo user to use for replication. If no password
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is provided the directory manager password will be used.
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"""
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if passwd:
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self.repl_man_passwd = passwd
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ent = ipaldap.Entry(self.repl_man_dn)
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ent.setValues("objectclass", "top", "person")
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ent.setValues("cn", self.repl_man_cn)
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ent.setValues("userpassword", self.repl_man_passwd)
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ent.setValues("sn", "replication manager pseudo user")
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try:
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conn.add_s(ent)
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except ldap.ALREADY_EXISTS:
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# should we set the password here?
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pass
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def delete_replication_manager(self, conn, dn="cn=replication manager,cn=config"):
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try:
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conn.delete_s(dn)
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except ldap.NO_SUCH_OBJECT:
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pass
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def get_replica_type(self, master=True):
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if master:
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return "3"
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else:
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return "2"
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def replica_dn(self):
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return 'cn=replica, cn="%s", cn=mapping tree, cn=config' % self.suffix
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def local_replica_config(self, conn, replica_id):
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dn = self.replica_dn()
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try:
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conn.getEntry(dn, ldap.SCOPE_BASE)
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# replication is already configured
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return
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except errors.NotFound:
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pass
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replica_type = self.get_replica_type()
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entry = ipaldap.Entry(dn)
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entry.setValues('objectclass', "top", "nsds5replica", "extensibleobject")
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entry.setValues('cn', "replica")
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entry.setValues('nsds5replicaroot', self.suffix)
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entry.setValues('nsds5replicaid', str(replica_id))
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entry.setValues('nsds5replicatype', replica_type)
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entry.setValues('nsds5flags', "1")
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entry.setValues('nsds5replicabinddn', [self.repl_man_dn])
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entry.setValues('nsds5replicalegacyconsumer', "off")
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conn.add_s(entry)
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def setup_changelog(self, conn):
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dn = "cn=changelog5, cn=config"
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dirpath = conn.dbdir + "/cldb"
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entry = ipaldap.Entry(dn)
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entry.setValues('objectclass', "top", "extensibleobject")
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entry.setValues('cn', "changelog5")
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entry.setValues('nsslapd-changelogdir', dirpath)
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try:
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conn.add_s(entry)
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except ldap.ALREADY_EXISTS:
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return
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def setup_chaining_backend(self, conn):
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chaindn = "cn=chaining database, cn=plugins, cn=config"
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benamebase = "chaindb"
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urls = [self.to_ldap_url(conn)]
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cn = ""
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benum = 1
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done = False
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while not done:
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try:
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cn = benamebase + str(benum) # e.g. localdb1
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dn = "cn=" + cn + ", " + chaindn
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entry = ipaldap.Entry(dn)
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entry.setValues('objectclass', 'top', 'extensibleObject', 'nsBackendInstance')
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entry.setValues('cn', cn)
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entry.setValues('nsslapd-suffix', self.suffix)
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entry.setValues('nsfarmserverurl', urls)
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entry.setValues('nsmultiplexorbinddn', self.repl_man_dn)
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entry.setValues('nsmultiplexorcredentials', self.repl_man_passwd)
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self.conn.add_s(entry)
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done = True
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except ldap.ALREADY_EXISTS:
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benum += 1
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except ldap.LDAPError, e:
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print "Could not add backend entry " + dn, e
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raise
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return cn
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def to_ldap_url(self, conn):
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return "ldap://%s:%d/" % (conn.host, conn.port)
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def setup_chaining_farm(self, conn):
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try:
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conn.modify_s(self.suffix, [(ldap.MOD_ADD, 'aci',
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[ "(targetattr = \"*\")(version 3.0; acl \"Proxied authorization for database links\"; allow (proxy) userdn = \"ldap:///%s\";)" % self.repl_man_dn ])])
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except ldap.TYPE_OR_VALUE_EXISTS:
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logging.debug("proxy aci already exists in suffix %s on %s" % (self.suffix, conn.host))
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def get_mapping_tree_entry(self):
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try:
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entry = self.conn.getEntry("cn=mapping tree,cn=config", ldap.SCOPE_ONELEVEL,
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"(cn=\"%s\")" % (self.suffix))
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except errors.NotFound, e:
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logging.debug("failed to find mappting tree entry for %s" % self.suffix)
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raise e
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return entry
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def enable_chain_on_update(self, bename):
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mtent = self.get_mapping_tree_entry()
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dn = mtent.dn
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plgent = self.conn.getEntry("cn=Multimaster Replication Plugin,cn=plugins,cn=config",
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ldap.SCOPE_BASE, "(objectclass=*)", ['nsslapd-pluginPath'])
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path = plgent.getValue('nsslapd-pluginPath')
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mod = [(ldap.MOD_REPLACE, 'nsslapd-state', 'backend'),
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(ldap.MOD_ADD, 'nsslapd-backend', bename),
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(ldap.MOD_ADD, 'nsslapd-distribution-plugin', path),
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(ldap.MOD_ADD, 'nsslapd-distribution-funct', 'repl_chain_on_update')]
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try:
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self.conn.modify_s(dn, mod)
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except ldap.TYPE_OR_VALUE_EXISTS:
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logging.debug("chainOnUpdate already enabled for %s" % self.suffix)
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def setup_chain_on_update(self, other_conn):
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chainbe = self.setup_chaining_backend(other_conn)
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self.enable_chain_on_update(chainbe)
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def add_passsync_user(self, conn, password):
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pass_dn = "uid=passsync,cn=sysaccounts,cn=etc,%s" % self.suffix
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print "The user for the Windows PassSync service is %s" % pass_dn
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try:
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conn.getEntry(pass_dn, ldap.SCOPE_BASE)
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print "Windows PassSync entry exists, not resetting password"
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return
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except errors.NotFound:
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pass
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# The user doesn't exist, add it
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entry = ipaldap.Entry(pass_dn)
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entry.setValues("objectclass", ["account", "simplesecurityobject"])
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entry.setValues("uid", "passsync")
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entry.setValues("userPassword", password)
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conn.add_s(entry)
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# Add it to the list of users allowed to bypass password policy
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extop_dn = "cn=ipa_pwd_extop,cn=plugins,cn=config"
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entry = conn.getEntry(extop_dn, ldap.SCOPE_BASE)
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pass_mgrs = entry.getValues('passSyncManagersDNs')
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if not pass_mgrs:
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pass_mgrs = []
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if not isinstance(pass_mgrs, list):
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pass_mgrs = [pass_mgrs]
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pass_mgrs.append(pass_dn)
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mod = [(ldap.MOD_REPLACE, 'passSyncManagersDNs', pass_mgrs)]
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conn.modify_s(extop_dn, mod)
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# And finally grant it permission to write passwords
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mod = [(ldap.MOD_ADD, 'aci',
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['(targetattr = "userPassword || krbPrincipalKey || sambaLMPassword || sambaNTPassword || passwordHistory")(version 3.0; acl "Windows PassSync service can write passwords"; allow (write) userdn="ldap:///%s";)' % pass_dn])]
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try:
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conn.modify_s(self.suffix, mod)
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except ldap.TYPE_OR_VALUE_EXISTS:
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logging.debug("passsync aci already exists in suffix %s on %s" % (self.suffix, conn.host))
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def setup_winsync_agmt(self, entry, **kargs):
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entry.setValues("objectclass", "nsDSWindowsReplicationAgreement")
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entry.setValues("nsds7WindowsReplicaSubtree",
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kargs.get("win_subtree",
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WIN_USER_CONTAINER + "," + self.suffix))
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entry.setValues("nsds7DirectoryReplicaSubtree",
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kargs.get("ds_subtree",
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IPA_USER_CONTAINER + "," + self.suffix))
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# for now, just sync users and ignore groups
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entry.setValues("nsds7NewWinUserSyncEnabled", kargs.get('newwinusers', 'true'))
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entry.setValues("nsds7NewWinGroupSyncEnabled", kargs.get('newwingroups', 'false'))
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windomain = ''
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if kargs.has_key('windomain'):
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windomain = kargs['windomain']
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else:
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windomain = '.'.join(ldap.explode_dn(self.suffix, 1))
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entry.setValues("nsds7WindowsDomain", windomain)
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def agreement_dn(self, hostname, port=PORT):
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cn = "meTo%s%d" % (hostname, port)
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dn = "cn=%s, %s" % (cn, self.replica_dn())
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return (cn, dn)
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def setup_agreement(self, a, b, **kargs):
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cn, dn = self.agreement_dn(b.host)
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try:
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a.getEntry(dn, ldap.SCOPE_BASE)
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return
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except errors.NotFound:
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pass
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iswinsync = kargs.get("winsync", False)
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repl_man_dn = kargs.get("binddn", self.repl_man_dn)
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repl_man_passwd = kargs.get("bindpw", self.repl_man_passwd)
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port = kargs.get("port", PORT)
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entry = ipaldap.Entry(dn)
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entry.setValues('objectclass', "nsds5replicationagreement")
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entry.setValues('cn', cn)
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entry.setValues('nsds5replicahost', b.host)
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entry.setValues('nsds5replicaport', str(port))
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entry.setValues('nsds5replicatimeout', str(TIMEOUT))
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entry.setValues('nsds5replicabinddn', repl_man_dn)
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entry.setValues('nsds5replicacredentials', repl_man_passwd)
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entry.setValues('nsds5replicabindmethod', 'simple')
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entry.setValues('nsds5replicaroot', self.suffix)
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entry.setValues('nsds5replicaupdateschedule', '0000-2359 0123456')
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entry.setValues('nsds5replicatransportinfo', 'SSL')
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entry.setValues('nsDS5ReplicatedAttributeList', '(objectclass=*) $ EXCLUDE memberOf')
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entry.setValues('description', "me to %s%d" % (b.host, port))
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if iswinsync:
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self.setup_winsync_agmt(entry, **kargs)
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a.add_s(entry)
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entry = a.waitForEntry(entry)
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def delete_agreement(self, hostname):
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cn, dn = self.agreement_dn(hostname)
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return self.conn.deleteEntry(dn)
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def check_repl_init(self, conn, agmtdn):
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done = False
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hasError = 0
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attrlist = ['cn', 'nsds5BeginReplicaRefresh',
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'nsds5replicaUpdateInProgress',
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'nsds5ReplicaLastInitStatus',
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'nsds5ReplicaLastInitStart',
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'nsds5ReplicaLastInitEnd']
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entry = conn.getEntry(agmtdn, ldap.SCOPE_BASE, "(objectclass=*)", attrlist)
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if not entry:
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print "Error reading status from agreement", agmtdn
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hasError = 1
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else:
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refresh = entry.nsds5BeginReplicaRefresh
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inprogress = entry.nsds5replicaUpdateInProgress
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status = entry.nsds5ReplicaLastInitStatus
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if not refresh: # done - check status
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if not status:
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print "No status yet"
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elif status.find("replica busy") > -1:
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print "[%s] reports: Replica Busy! Status: [%s]" % (conn.host, status)
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done = True
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hasError = 2
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elif status.find("Total update succeeded") > -1:
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print "Update succeeded"
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done = True
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elif inprogress.lower() == 'true':
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print "Update in progress yet not in progress"
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else:
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print "[%s] reports: Update failed! Status: [%s]" % (conn.host, status)
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hasError = 1
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done = True
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else:
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print "Update in progress"
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return done, hasError
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def check_repl_update(self, conn, agmtdn):
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done = False
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hasError = 0
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attrlist = ['cn', 'nsds5replicaUpdateInProgress',
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'nsds5ReplicaLastUpdateStatus', 'nsds5ReplicaLastUpdateStart',
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'nsds5ReplicaLastUpdateEnd']
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entry = conn.getEntry(agmtdn, ldap.SCOPE_BASE, "(objectclass=*)", attrlist)
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if not entry:
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print "Error reading status from agreement", agmtdn
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hasError = 1
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else:
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inprogress = entry.nsds5replicaUpdateInProgress
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status = entry.nsds5ReplicaLastUpdateStatus
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start = entry.nsds5ReplicaLastUpdateStart
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end = entry.nsds5ReplicaLastUpdateEnd
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# incremental update is done if inprogress is false and end >= start
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done = inprogress and inprogress.lower() == 'false' and start and end and (start <= end)
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logging.info("Replication Update in progress: %s: status: %s: start: %s: end: %s" %
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(inprogress, status, start, end))
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if not done and status: # check for errors
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# status will usually be a number followed by a string
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# number != 0 means error
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rc, msg = status.split(' ', 1)
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if rc != '0':
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hasError = 1
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done = True
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return done, hasError
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def wait_for_repl_init(self, conn, agmtdn):
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done = False
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haserror = 0
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while not done and not haserror:
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time.sleep(1) # give it a few seconds to get going
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done, haserror = self.check_repl_init(conn, agmtdn)
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return haserror
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def wait_for_repl_update(self, conn, agmtdn, maxtries=600):
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done = False
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haserror = 0
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while not done and not haserror and maxtries > 0:
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time.sleep(1) # give it a few seconds to get going
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done, haserror = self.check_repl_update(conn, agmtdn)
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maxtries -= 1
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if maxtries == 0: # too many tries
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print "Error: timeout: could not determine agreement status: please check your directory server logs for possible errors"
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haserror = 1
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return haserror
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def start_replication(self, other_conn, conn=None):
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print "Starting replication, please wait until this has completed."
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if conn == None:
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conn = self.conn
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cn, dn = self.agreement_dn(conn.host)
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mod = [(ldap.MOD_ADD, 'nsds5BeginReplicaRefresh', 'start')]
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other_conn.modify_s(dn, mod)
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return self.wait_for_repl_init(other_conn, dn)
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def basic_replication_setup(self, conn, replica_id):
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|
self.add_replication_manager(conn)
|
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self.local_replica_config(conn, replica_id)
|
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self.setup_changelog(conn)
|
|
|
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def setup_replication(self, other_hostname, realm_name, **kargs):
|
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"""
|
|
NOTES:
|
|
- the directory manager password needs to be the same on
|
|
both directories. Or use the optional binddn and bindpw
|
|
"""
|
|
iswinsync = kargs.get("winsync", False)
|
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oth_port = kargs.get("port", PORT)
|
|
oth_cacert = kargs.get("cacert", CACERT)
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oth_binddn = kargs.get("binddn", DIRMAN_CN)
|
|
oth_bindpw = kargs.get("bindpw", self.dirman_passwd)
|
|
# note - there appears to be a bug in python-ldap - it does not
|
|
# allow connections using two different CA certs
|
|
other_conn = ipaldap.IPAdmin(other_hostname, port=oth_port, cacert=oth_cacert)
|
|
try:
|
|
other_conn.do_simple_bind(binddn=oth_binddn, bindpw=oth_bindpw)
|
|
except Exception, e:
|
|
if iswinsync:
|
|
logging.info("Could not validate connection to remote server %s:%d - continuing" %
|
|
(other_hostname, oth_port))
|
|
logging.info("The error was: %s" % e)
|
|
else:
|
|
raise e
|
|
|
|
self.suffix = ipaldap.IPAdmin.normalizeDN(util.realm_to_suffix(realm_name))
|
|
|
|
if not iswinsync:
|
|
local_id = self._get_replica_id(self.conn, other_conn)
|
|
else:
|
|
# there is no other side to get a replica ID from
|
|
local_id = self._get_replica_id(self.conn, self.conn)
|
|
self.basic_replication_setup(self.conn, local_id)
|
|
|
|
if not iswinsync:
|
|
other_id = self._get_replica_id(other_conn, other_conn)
|
|
self.basic_replication_setup(other_conn, other_id)
|
|
self.setup_agreement(other_conn, self.conn)
|
|
self.setup_agreement(self.conn, other_conn)
|
|
return self.start_replication(other_conn)
|
|
else:
|
|
self.add_passsync_user(self.conn, kargs.get("passsync"))
|
|
self.setup_agreement(self.conn, other_conn, **kargs)
|
|
logging.info("Added new sync agreement, waiting for it to become ready . . .")
|
|
cn, dn = self.agreement_dn(other_hostname)
|
|
self.wait_for_repl_update(self.conn, dn, 30)
|
|
logging.info("Agreement is ready, starting replication . . .")
|
|
return self.start_replication(self.conn, other_conn)
|
|
|
|
def initialize_replication(self, dn, conn):
|
|
mod = [(ldap.MOD_ADD, 'nsds5BeginReplicaRefresh', 'start')]
|
|
try:
|
|
conn.modify_s(dn, mod)
|
|
except ldap.ALREADY_EXISTS:
|
|
return
|
|
|
|
def force_synch(self, dn, schedule, conn):
|
|
newschedule = '2358-2359 0'
|
|
|
|
# On the remote chance of a match. We force a synch to happen right
|
|
# now by changing the schedule to something else and quickly changing
|
|
# it back.
|
|
if newschedule == schedule:
|
|
newschedule = '2358-2359 1'
|
|
logging.info("Changing agreement %s schedule to %s to force synch" %
|
|
(dn, newschedule))
|
|
mod = [(ldap.MOD_REPLACE, 'nsDS5ReplicaUpdateSchedule', [ newschedule ])]
|
|
conn.modify_s(dn, mod)
|
|
time.sleep(1)
|
|
logging.info("Changing agreement %s to restore original schedule %s" %
|
|
(dn, schedule))
|
|
mod = [(ldap.MOD_REPLACE, 'nsDS5ReplicaUpdateSchedule', [ schedule ])]
|
|
conn.modify_s(dn, mod)
|
|
|
|
def get_agreement_type(self, hostname):
|
|
cn, dn = self.agreement_dn(hostname)
|
|
|
|
entry = self.conn.getEntry(dn, ldap.SCOPE_BASE)
|
|
|
|
objectclass = entry.getValues("objectclass")
|
|
|
|
for o in objectclass:
|
|
if o.lower() == "nsdswindowsreplicationagreement":
|
|
return WINSYNC
|
|
|
|
return IPA_REPLICA
|