/usr/lib/python3/dist-packages/lib389/replica.py is in python3-lib389 1.3.7.10-1ubuntu1.
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# Copyright (C) 2015 Red Hat, Inc.
# All rights reserved.
#
# License: GPL (version 3 or any later version).
# See LICENSE for details.
# --- END COPYRIGHT BLOCK ---
import ldap
import os
import decimal
import time
from lib389._constants import *
from lib389.properties import *
from lib389.utils import normalizeDN, escapeDNValue, ensure_bytes
from lib389._replication import RUV
from lib389.repltools import ReplTools
from lib389 import DirSrv, Entry, NoSuchEntryError, InvalidArgumentError
from lib389._mapped_object import DSLdapObjects, DSLdapObject
class ReplicaLegacy(object):
proxied_methods = 'search_s getEntry'.split()
def __init__(self, conn):
"""@param conn - a DirSrv instance"""
self.conn = conn
self.log = conn.log
def __getattr__(self, name):
if name in ReplicaLegacy.proxied_methods:
return DirSrv.__getattr__(self.conn, name)
def _get_mt_entry(self, suffix):
"""Return the replica dn of the given suffix."""
mtent = self.conn.mappingtree.list(suffix=suffix)[0]
return ','.join(("cn=replica", mtent.dn))
@staticmethod
def _valid_role(role):
if role != ReplicaRole.MASTER and \
role != ReplicaRole.HUB and \
role != ReplicaRole.CONSUMER:
return False
else:
return True
@staticmethod
def _valid_rid(role, rid=None):
if role == ReplicaRole.MASTER:
if not decimal.Decimal(rid) or \
(rid <= 0) or \
(rid >= CONSUMER_REPLICAID):
return False
else:
if rid and (rid != CONSUMER_REPLICAID):
return False
return True
@staticmethod
def _set_or_default(attribute, properties, default):
'''
If 'attribute' or '+attribute' or '-attribute' exist in
'properties' it does nothing. Else it set (ldap.MOD_REPLACE)
'attribute' in 'properties'
to the 'default' value
'''
add_attribute = "+%s" % attribute
del_attribute = "-%s" % attribute
if attribute in properties or \
add_attribute in properties or \
del_attribute in properties:
return
properties[attribute] = default
def create_repl_manager(self, repl_manager_dn=None, repl_manager_pw=None):
'''
Create an entry that will be used to bind as replica manager.
@param repl_manager_dn - DN of the bind entry. If not provided use
the default one
@param repl_manager_pw - Password of the entry. If not provide use
the default one
@return None
@raise - KeyError if can not find valid values of Bind DN and Pwd
'''
# check the DN and PW
try:
repl_manager_dn = repl_manager_dn or \
defaultProperties[REPLICATION_BIND_DN]
repl_manager_pw = repl_manager_pw or \
defaultProperties[REPLICATION_BIND_PW]
if not repl_manager_dn or not repl_manager_pw:
raise KeyError
except KeyError:
if not repl_manager_pw:
self.log.warning("replica_createReplMgr: bind DN password " +
"not specified")
if not repl_manager_dn:
self.log.warning("replica_createReplMgr: bind DN not " +
"specified")
raise
# if the replication manager entry already exists, ust return
try:
entries = self.search_s(repl_manager_dn, ldap.SCOPE_BASE,
"objectclass=*")
if entries:
# it already exist, fine
return
except ldap.NO_SUCH_OBJECT:
pass
# ok it does not exist, create it
try:
attrs = {'nsIdleTimeout': '0',
'passwordExpirationTime': '20381010000000Z'}
self.conn.setupBindDN(repl_manager_dn, repl_manager_pw, attrs)
except ldap.ALREADY_EXISTS:
self.log.warn("User already exists (weird we just checked: %s " %
repl_manager_dn)
def list(self, suffix=None, replica_dn=None):
"""
Return a list of replica entries.
If 'replica_dn' is specified it returns the related entry.
If 'suffix' is specified it returns the replica that is configured
for that 'suffix'.
If both 'replica_dn' and 'suffix' are specified it returns the
'replica_dn' entry.
If none of them are specified, it returns all the replicas
@param suffix - suffix of a replica
@param replica_dn - DN of a replica
@return replica entries
@raise search exceptions: ldap.NO_SUCH_OBJECT, ..
"""
# set base/filtr according to the arguments
if replica_dn:
base = replica_dn
filtr = "(objectclass=%s)" % REPLICA_OBJECTCLASS_VALUE
elif suffix:
base = DN_MAPPING_TREE
filtr = ("(&(objectclass=%s)(%s=%s))" %
(REPLICA_OBJECTCLASS_VALUE,
REPLICA_PROPNAME_TO_ATTRNAME[REPLICA_SUFFIX], suffix))
else:
base = DN_MAPPING_TREE
filtr = "(objectclass=%s)" % REPLICA_OBJECTCLASS_VALUE
# now do the effective search
ents = self.conn.search_s(base, ldap.SCOPE_SUBTREE, filtr)
return ents
def setProperties(self, suffix=None, replica_dn=None, replica_entry=None,
properties=None):
'''
Set the properties of the replica. If an 'replica_entry' (Entry) is
provided, it updates the entry, else it updates the entry on the
server. If the 'replica_dn' is provided it retrieves the entry
using it, else it retrieve the replica using the 'suffix'.
@param suffix : suffix stored in that replica (online update)
@param replica_dn: DN of the replica (online update)
@param replica_entry: Entry of a replica (offline update)
@param properties: dictionary of properties
Supported properties are:
REPLICA_SUFFIX
REPLICA_ID
REPLICA_TYPE
REPLICA_BINDDN
REPLICA_PURGE_DELAY
REPLICA_PRECISE_PURGING
REPLICA_REFERRAL
REPLICA_FLAGS
@return None
@raise ValueError: if unknown properties
ValueError: if invalid replica_entry
ValueError: if replica_dn or suffix are not associated to
a replica
'''
# No properties provided
if len(properties) == 0:
return
# check that the given properties are valid
for prop in properties:
# skip the prefix to add/del value
if not inProperties(prop, REPLICA_PROPNAME_TO_ATTRNAME):
raise ValueError("unknown property: %s" % prop)
else:
self.log.debug("setProperties: %s:%s" %
(prop, properties[prop]))
# At least we need to have suffix/replica_dn/replica_entry
if not suffix and not replica_dn and not replica_entry:
raise InvalidArgumentError("suffix and replica_dn and replica_" +
"entry are missing")
# the caller provides a set of properties to set into a replica entry
if replica_entry:
if not isinstance(replica_entry, Entry):
raise ValueError("invalid instance of the replica_entry")
# that is fine, now set the values
for prop in properties:
val = rawProperty(prop)
# for Entry update it is a replace
replica_entry.update({REPLICA_PROPNAME_TO_ATTRNAME[val]:
properties[prop]})
return
# If it provides the suffix or the replicaDN, replica.list will
# return the appropriate entry
ents = self.conn.replica.list(suffix=suffix, replica_dn=replica_dn)
if len(ents) != 1:
if replica_dn:
raise ValueError("invalid replica DN: %s" % replica_dn)
else:
raise ValueError("invalid suffix: %s" % suffix)
# build the MODS
mods = []
for prop in properties:
# take the operation type from the property name
val = rawProperty(prop)
if str(prop).startswith('+'):
op = ldap.MOD_ADD
elif str(prop).startswith('-'):
op = ldap.MOD_DELETE
else:
op = ldap.MOD_REPLACE
mods.append((op, REPLICA_PROPNAME_TO_ATTRNAME[val],
properties[prop]))
# that is fine now to apply the MOD
self.conn.modify_s(ents[0].dn, mods)
def getProperties(self, suffix=None, replica_dn=None, replica_entry=None,
properties=None):
raise NotImplementedError
def get_role(self, suffix):
"""Return the replica role
@return: ReplicaRole.MASTER, ReplicaRole.HUB, ReplicaRole.CONSUMER
"""
filter_str = ('(&(objectclass=nsDS5Replica)(nsDS5ReplicaRoot=%s))'.format(suffix))
try:
replica_entry = self.conn.search_s(DN_CONFIG, ldap.SCOPE_SUBTREE,
filter_str)
if replica_entry:
repltype = replica_entry[0].getValue(REPL_TYPE)
replflags = replica_entry[0].getValue(REPL_FLAGS)
if repltype == REPLICA_RDWR_TYPE and replflags == REPLICA_FLAGS_WRITE:
replicarole = ReplicaRole.MASTER
elif repltype == REPLICA_RDONLY_TYPE and replflags == REPLICA_FLAGS_WRITE:
replicarole = ReplicaRole.HUB
elif repltype == REPLICA_RDONLY_TYPE and replflags == REPLICA_FLAGS_RDONLY:
replicarole = ReplicaRole.CONSUMER
else:
raise ValueError("Failed to determine a replica role")
return replicarole
except ldap.LDAPError as e:
raise ValueError('Failed to get replica entry: %s' % str(e))
def create(self, suffix=None, role=None, rid=None, args=None):
"""
Create a replica entry on an existing suffix.
@param suffix - dn of suffix
@param role - ReplicaRole.MASTER, ReplicaRole.HUB or
ReplicaRole.CONSUMER
@param rid - number that identify the supplier replica
(role=ReplicaRole.MASTER) in the topology. For
hub/consumer (role=ReplicaRole.HUB or
ReplicaRole.CONSUMER), rid value is not used.
This parameter is mandatory for supplier.
@param args - dictionary of initial replica's properties
Supported properties are:
REPLICA_SUFFIX
REPLICA_ID
REPLICA_TYPE
REPLICA_BINDDN [defaultProperties[REPLICATION_BIND_DN]]
REPLICA_PURGE_DELAY
REPLICA_PRECISE_PURGING
REPLICA_REFERRAL
REPLICA_FLAGS
@return replica DN
@raise InvalidArgumentError - if missing mandatory arguments
ValueError - argument with invalid value
LDAPError - failed to add replica entry
"""
# Check validity of role
if not role:
self.log.fatal("Replica.create: replica role is not specified (ReplicaRole.*)")
raise InvalidArgumentError("role missing")
if not ReplicaLegacy._valid_role(role):
self.log.fatal("enableReplication: replica role invalid (%s) " % role)
raise ValueError("invalid role: %s" % role)
# check the validity of 'rid'
if not ReplicaLegacy._valid_rid(role, rid=rid):
self.log.fatal("Replica.create: replica role is master but 'rid'" +
" is missing or invalid value")
raise InvalidArgumentError("rid missing or invalid value")
# check the validity of the suffix
if not suffix:
self.log.fatal("Replica.create: suffix is missing")
raise InvalidArgumentError("suffix missing")
else:
nsuffix = normalizeDN(suffix)
# role is fine, set the replica type
if role == ReplicaRole.MASTER:
rtype = REPLICA_RDWR_TYPE
else:
rtype = REPLICA_RDONLY_TYPE
# Set the properties provided as mandatory parameter
# The attribute name is not prefixed '+'/'-' => ldap.MOD_REPLACE
properties = {REPLICA_SUFFIX: nsuffix,
REPLICA_ID: str(rid),
REPLICA_TYPE: str(rtype)}
# If the properties in args are valid
# add them to the 'properties' dictionary
# The attribute name may be prefixed '+'/'-' => keep MOD type as
# provided in args
if args:
for prop in args:
if not inProperties(prop, REPLICA_PROPNAME_TO_ATTRNAME):
raise ValueError("unknown property: %s" % prop)
properties[prop] = args[prop]
# Now set default values of unset properties
ReplicaLegacy._set_or_default(REPLICA_BINDDN, properties,
[defaultProperties[REPLICATION_BIND_DN]])
# Set flags explicitly, so it will be more readable
if role == ReplicaRole.CONSUMER:
properties[REPLICA_FLAGS] = str(REPLICA_FLAGS_RDONLY)
else:
properties[REPLICA_FLAGS] = str(REPLICA_FLAGS_WRITE)
#
# Check if replica entry is already in the mapping-tree
#
mtents = self.conn.mappingtree.list(suffix=nsuffix)
mtent = mtents[0]
dn_replica = ','.join((RDN_REPLICA, mtent.dn))
try:
entry = self.conn.getEntry(dn_replica, ldap.SCOPE_BASE)
self.log.warn("Already setup replica for suffix %r" % nsuffix)
self.conn.suffixes.setdefault(nsuffix, {})
self.conn.replica.setProperties(replica_dn=dn_replica,
properties=properties)
return dn_replica
except ldap.NO_SUCH_OBJECT:
entry = None
#
# Now create the replica entry
#
entry = Entry(dn_replica)
entry.setValues("objectclass", "top", "nsDS5Replica",
"extensibleobject")
self.conn.replica.setProperties(replica_entry=entry,
properties=properties)
self.conn.add_s(entry)
self.conn.suffixes[nsuffix] = {'dn': dn_replica, 'type': rtype}
return dn_replica
def deleteAgreements(self, suffix=None):
'''
Delete all the agreements for the suffix
'''
# check the validity of the suffix
if not suffix:
self.log.fatal("disableReplication: suffix is missing")
raise InvalidArgumentError("suffix missing")
else:
nsuffix = normalizeDN(suffix)
# Build the replica config DN
mtents = self.conn.mappingtree.list(suffix=nsuffix)
mtent = mtents[0]
dn_replica = ','.join((RDN_REPLICA, mtent.dn))
# Delete the agreements
try:
agmts = self.conn.agreement.list(suffix=suffix)
for agmt in agmts:
try:
self.conn.delete_s(agmt.dn)
except ldap.LDAPError as e:
self.log.fatal('Failed to delete replica agreement (%s),' +
' error: %s' %
(agmt.dn, str(e)))
raise
except ldap.LDAPError as e:
self.log.fatal('Failed to search for replication agreements ' +
'under (%s), error: %s' % (dn_replica, str(e)))
raise
def disableReplication(self, suffix=None):
'''
Delete a replica related to the provided suffix.
If this replica role was ReplicaRole.HUB or ReplicaRole.MASTER, it
also deletes the changelog associated to that replica. If it
exists some replication agreement below that replica, they are
deleted.
@param suffix - dn of suffix
@return None
@raise InvalidArgumentError - if suffix is missing
ldap.LDAPError - for all other update failures
'''
# check the validity of the suffix
if not suffix:
self.log.fatal("disableReplication: suffix is missing")
raise InvalidArgumentError("suffix missing")
else:
nsuffix = normalizeDN(suffix)
# Build the replica config DN
mtents = self.conn.mappingtree.list(suffix=nsuffix)
mtent = mtents[0]
dn_replica = ','.join((RDN_REPLICA, mtent.dn))
# Delete the agreements
try:
self.deleteAgreements(nsuffix)
except ldap.LDAPError as e:
self.log.fatal('Failed to delete replica agreements!')
raise
# Delete the replica
try:
self.conn.delete_s(dn_replica)
except ldap.LDAPError as e:
self.log.fatal('Failed to delete replica configuration ' +
'(%s), error: %s' % (dn_replica, str(e)))
raise
def enableReplication(self, suffix=None, role=None,
replicaId=CONSUMER_REPLICAID,
properties=None):
if not suffix:
self.log.fatal("enableReplication: suffix not specified")
raise ValueError("suffix missing")
if not role:
self.log.fatal("enableReplication: replica role not specify " +
"(ReplicaRole.*)")
raise ValueError("role missing")
#
# Check the validity of the parameters
#
# First role and replicaID
if role != ReplicaRole.MASTER and \
role != ReplicaRole.HUB and \
role != ReplicaRole.CONSUMER:
self.log.fatal("enableReplication: replica role invalid (%s) " %
role)
raise ValueError("invalid role: %s" % role)
if role == ReplicaRole.MASTER:
# check the replicaId [1..CONSUMER_REPLICAID[
if not decimal.Decimal(replicaId) or \
(replicaId <= 0) or \
(replicaId >= CONSUMER_REPLICAID):
self.log.fatal("enableReplication: invalid replicaId (%s) "
"for a RW replica" % replicaId)
raise ValueError("invalid replicaId %d (expected [1.."
"CONSUMER_REPLICAID]" % replicaId)
elif replicaId != CONSUMER_REPLICAID:
# check the replicaId is CONSUMER_REPLICAID
self.log.fatal("enableReplication: invalid replicaId (%s) for a "
"Read replica (expected %d)" %
(replicaId, CONSUMER_REPLICAID))
raise ValueError("invalid replicaId: %d for HUB/CONSUMER "
"replicaId is CONSUMER_REPLICAID" % replicaId)
# Now check we have a suffix
entries_backend = self.conn.backend.list(suffix=suffix)
if not entries_backend:
self.log.fatal("enableReplication: unable to retrieve the " +
"backend for %s" % suffix)
raise ValueError("no backend for suffix %s" % suffix)
ent = entries_backend[0]
if normalizeDN(suffix) != normalizeDN(ent.getValue('nsslapd-suffix')):
self.log.warning("enableReplication: suffix (%s) and backend "
"suffix (%s) differs" %
(suffix, entries_backend[0].nsslapd - suffix))
pass
# Now prepare the bindDN property
if properties is None:
properties = {REPLICA_BINDDN:
defaultProperties.get(REPLICATION_BIND_DN, None)}
elif REPLICA_BINDDN not in properties:
properties[REPLICA_BINDDN] = \
defaultProperties.get(REPLICATION_BIND_DN, None)
if not properties[REPLICA_BINDDN]:
# weird, internal error we do not retrieve the default
# replication bind DN this replica will not be updatable
# through replication until the binddn property will be set
self.log.warning("enableReplication: binddn not provided and" +
" default value unavailable")
pass
# First add the changelog if master/hub
if (role == ReplicaRole.MASTER) or (role == ReplicaRole.HUB):
self.conn.changelog.create()
# Second create the default replica manager entry if it does not exist
# it should not be called from here but for the moment I am unsure when
# to create it elsewhere
self.conn.replica.create_repl_manager()
# then enable replication
ret = self.conn.replica.create(suffix=suffix, role=role, rid=replicaId,
args=properties)
return ret
def check_init(self, agmtdn):
"""Check that a total update has completed
@returns tuple - first element is done/not done, 2nd is no error/has
error
@param agmtdn - the agreement dn
"""
done, hasError = False, 0
attrlist = ['cn',
'nsds5BeginReplicaRefresh',
'nsds5replicaUpdateInProgress',
'nsds5ReplicaLastInitStatus',
'nsds5ReplicaLastInitStart',
'nsds5ReplicaLastInitEnd']
try:
entry = self.conn.getEntry(
agmtdn, ldap.SCOPE_BASE, "(objectclass=*)", attrlist)
except NoSuchEntryError:
self.log.exception("Error reading status from agreement %r" %
agmtdn)
hasError = 1
else:
refresh = entry.nsds5BeginReplicaRefresh
inprogress = entry.nsds5replicaUpdateInProgress
status = entry.nsds5ReplicaLastInitStatus
if not refresh: # done - check status
if not status:
print("No status yet")
elif status.find(ensure_bytes("replica busy")) > -1:
print("Update failed - replica busy - status", status)
done = True
hasError = 2
elif status.find(ensure_bytes("Total update succeeded")) > -1:
print("Update succeeded: status ", status)
done = True
elif inprogress.lower() == ensure_bytes('true'):
print("Update in progress yet not in progress: status ",
status)
else:
print("Update failed: status", status)
hasError = 1
done = True
elif self.verbose:
print("Update in progress: status", status)
return done, hasError
def start_and_wait(self, agmtdn):
"""@param agmtdn - agreement dn"""
rc = self.start_async(agmtdn)
if not rc:
rc = self.wait_init(agmtdn)
if rc == 2: # replica busy - retry
rc = self.start_and_wait(agmtdn)
return rc
def wait_init(self, agmtdn):
"""Initialize replication and wait for completion.
@oaram agmtdn - agreement dn
"""
done = False
haserror = 0
while not done and not haserror:
time.sleep(1) # give it a few seconds to get going
done, haserror = self.check_init(agmtdn)
return haserror
def start_async(self, agmtdn):
"""Initialize replication without waiting.
@param agmtdn - agreement dn
"""
self.log.info("Starting async replication %s" % agmtdn)
mod = [(ldap.MOD_ADD, 'nsds5BeginReplicaRefresh', 'start')]
self.conn.modify_s(agmtdn, mod)
def keep_in_sync(self, agmtdn):
"""
@param agmtdn -
"""
self.log.info("Setting agreement for continuous replication")
raise NotImplementedError("Check nsds5replicaupdateschedule before " +
"writing!")
def ruv(self, suffix, tryrepl=False):
"""return a replica update vector for the given suffix.
@param suffix - eg. 'o=netscapeRoot'
@raises NoSuchEntryError if missing
"""
filt = "(&(nsUniqueID=%s)(objectclass=%s))" % (REPLICA_RUV_UUID,
REPLICA_OC_TOMBSTONE)
attrs = ['nsds50ruv', 'nsruvReplicaLastModified']
ents = self.conn.search_s(suffix, ldap.SCOPE_SUBTREE, filt, attrs)
ent = None
if ents and (len(ents) > 0):
ent = ents[0]
elif tryrepl:
self.log.warn("Could not get RUV from %r entry -" +
" trying cn=replica" % suffix)
ensuffix = escapeDNValue(normalizeDN(suffix))
dn = ','.join(("cn=replica", "cn=%s" % ensuffix, DN_MAPPING_TREE))
ents = self.conn.search_s(dn, ldap.SCOPE_BASE, "objectclass=*",
attrs)
if ents and (len(ents) > 0):
ent = ents[0]
self.log.debug("RUV entry is %r" % ent)
return RUV(ent)
raise NoSuchEntryError("RUV not found: suffix: %r" % suffix)
def promote(self, suffix, newrole, rid=None, binddn=None):
"""
Promote the replica
@raise ValueError
"""
if newrole != ReplicaRole.MASTER and newrole != ReplicaRole.HUB:
raise ValueError('Can only prompt replica to "master" or "hub"')
if not binddn:
raise ValueError('"binddn" required for promotion')
if newrole == ReplicaRole.MASTER:
if not rid:
raise ValueError('"rid" required for promotion')
else:
# Must be a hub - set the rid
rid = CONSUMER_REPLICAID
# Get replica entry
filter_str = ('(&(objectclass=nsDS5Replica)(nsDS5ReplicaRoot=%s))' %
suffix)
try:
replica_entry = self.conn.search_s(DN_CONFIG, ldap.SCOPE_SUBTREE,
filter_str)
except ldap.LDAPError as e:
raise ValueError('Failed to get replica entry: %s' % str(e))
# Check the role type
replicarole = self.get_role(suffix)
if newrole.value < replicarole.value:
raise ValueError('Can not promote replica to lower role: {} -> {}'.format(replicarole.name, newrole.name))
#
# Create the changelog
#
try:
self.conn.changelog.create()
except ldap.LDAPError as e:
raise ValueError('Failed to create changelog: %s' % str(e))
#
# Check that a RID was provided, and its a valid number
#
if newrole == ReplicaRole.MASTER:
try:
rid = int(rid)
except:
# Not a number
raise ValueError('"rid" value (%s) is not a number' % str(rid))
if rid < 1 and rid > 65534:
raise ValueError('"rid" value (%d) is not in range ' +
' 1 - 65534' % rid)
#
# Set bind dn
#
try:
self.conn.modify_s(replica_entry[0].dn, [(ldap.MOD_REPLACE,
REPL_BINDDN, binddn)])
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
#
# Set the replica type and flags
#
if newrole == ReplicaRole.HUB:
try:
self.conn.modify_s(replica_entry[0].dn,
[(ldap.MOD_REPLACE, REPL_TYPE, '2'),
(ldap.MOD_REPLACE, REPL_FLAGS, '1')])
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
else: # master
try:
self.conn.modify_s(replica_entry[0].dn,
[(ldap.MOD_REPLACE, REPL_TYPE, '3'),
(ldap.MOD_REPLACE, REPL_FLAGS, '1'),
(ldap.MOD_REPLACE, REPL_ID, str(rid))])
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
def demote(self, suffix, newrole):
"""
Demote a replica to a hub or consumer
@raise ValueError
"""
if newrole != ReplicaRole.CONSUMER and newrole != ReplicaRole.HUB:
raise ValueError('Can only demote replica to "hub" or "consumer"')
# Get replica entry
filter_str = ('(&(objectclass=nsDS5Replica)(nsDS5ReplicaRoot=%s))' %
suffix)
try:
replica_entry = self.conn.search_s(DN_CONFIG, ldap.SCOPE_SUBTREE,
filter_str)
except ldap.LDAPError as e:
raise ValueError('Failed to get replica entry: %s' % str(e))
# Check the role type
replicarole = self.get_role(suffix)
if newrole.value > replicarole.value:
raise ValueError('Can not demote replica to higher role: {} -> {}'.format(replicarole.name, newrole.name))
#
# Demote it - set the replica type and flags
#
if newrole == ReplicaRole.HUB:
flag = '1'
else:
flag = '0'
try:
self.conn.modify_s(replica_entry[0].dn,
[(ldap.MOD_REPLACE, REPL_TYPE, '2'),
(ldap.MOD_REPLACE, REPL_FLAGS, flag),
(ldap.MOD_REPLACE, REPL_ID,
str(CONSUMER_REPLICAID))])
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
class Replica(DSLdapObject):
"""Replica DSLdapObject with:
- must attributes = ['cn', 'nsDS5ReplicaType', 'nsDS5ReplicaRoot',
'nsDS5ReplicaBindDN', 'nsDS5ReplicaId']
- RDN attribute is 'cn'
- There is one "replica" per backend
:param instance: A instance
:type instance: lib389.DirSrv
:param dn: Entry DN
:type dn: str
:param batch: Not implemented
:type batch: bool
"""
def __init__(self, instance, dn=None, batch=False):
super(Replica, self).__init__(instance, dn, batch)
self._rdn_attribute = 'cn'
self._must_attributes = ['cn', REPL_TYPE,
REPL_ROOT, REPL_BINDDN, REPL_ID]
self._create_objectclasses = ['top', 'extensibleObject',
REPLICA_OBJECTCLASS_VALUE]
self._protected = False
self._suffix = None
@staticmethod
def _valid_role(role):
"""Return True if role is valid
:param role: MASTER, HUB and CONSUMER
:type role: ReplicaRole
:returns: True if the role is a valid role object, otherwise return False
"""
if role != ReplicaRole.MASTER and \
role != ReplicaRole.HUB and \
role != ReplicaRole.CONSUMER:
return False
else:
return True
@staticmethod
def _valid_rid(role, rid=None):
"""Return True if rid is valid for the replica role
:param role: MASTER, HUB and CONSUMER
:type role: ReplicaRole
:param rid: Only needed if the role is a MASTER
:type rid: int
:returns: True is rid is valid, otherwise return False
"""
if rid is None:
return False
if role == ReplicaRole.MASTER:
if not decimal.Decimal(rid) or \
(rid <= 0) or \
(rid >= CONSUMER_REPLICAID):
return False
else:
if rid and (rid != CONSUMER_REPLICAID):
return False
return True
def delete(self):
"""Delete a replica related to the provided suffix.
If this replica role was ReplicaRole.HUB or ReplicaRole.MASTER, it
also deletes the changelog associated to that replica. If it
exists some replication agreement below that replica, they are
deleted.
:returns: None
:raises: - InvalidArgumentError - if suffix is missing
- ldap.LDAPError - for all other update failures
"""
# Get the suffix
suffix = self.get_attr_val(REPL_ROOT)
if not suffix:
self.log.fatal("disableReplication: suffix is not defined")
raise InvalidArgumentError("suffix missing")
# Delete the agreements
try:
self.deleteAgreements()
except ldap.LDAPError as e:
self.log.fatal('Failed to delete replica agreements!')
raise e
# Delete the replica
try:
super(Replica, self).delete()
except ldap.LDAPError as e:
self.log.fatal('Failed to delete replica configuration ' +
'(%s), error: %s' % (self._dn, str(e)))
raise e
def deleteAgreements(self):
"""Delete all the agreements for the suffix
:raises: LDAPError - If failing to delete or search for agreeme :type binddn: strnts
"""
# Delete the agreements
try:
suffix = self.get_attr_val(REPL_ROOT)
agmts = self._instance.agreement.list(suffix=suffix)
for agmt in agmts:
try:
self._instance.delete_s(agmt.dn)
except ldap.LDAPError as e:
self.log.fatal('Failed to delete replica agreement (%s),' +
' error: %s' % (agmt.dn, str(e)))
raise e
except ldap.LDAPError as e:
self.log.fatal('Failed to search for replication agreements ' +
'under (%s), error: %s' % (self._dn, str(e)))
raise e
def promote(self, newrole, binddn=None, rid=None):
"""Promote the replica to hub or master
:param newrole: The new replication role for the replica: MASTER and HUB
:type newrole: ReplicaRole
:param binddn: The replication bind dn - only applied to master
:type binddn: str
:param rid: The replication ID, applies only to promotions to "master"
:type rid: int
:returns: None
:raises: ValueError - If replica is not promoted
"""
if not binddn:
binddn = defaultProperties[REPLICATION_BIND_DN]
# Check the role type
replicarole = self.get_role()
if newrole.value <= replicarole.value:
raise ValueError('Can not promote replica to lower or the same role: {} -> {}'.format(replicarole.name, newrole.name))
if newrole == ReplicaRole.MASTER:
if not rid:
raise ValueError('"rid" required for promotion')
else:
# Must be a hub - set the rid
rid = CONSUMER_REPLICAID
# Create the changelog
try:
self._instance.changelog.create()
except ldap.LDAPError as e:
raise ValueError('Failed to create changelog: %s' % str(e))
# Check that a RID was provided, and its a valid number
if newrole == ReplicaRole.MASTER:
try:
rid = int(rid)
except:
# Not a number
raise ValueError('"rid" value (%s) is not a number' % str(rid))
if rid < 1 and rid > 65534:
raise ValueError('"rid" value (%d) is not in range ' +
' 1 - 65534' % rid)
# Set bind dn
try:
self.set(REPL_BINDDN, binddn)
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
# Promote it - set the replica type, flags and rid
if replicarole == ReplicaRole.CONSUMER and newrole == ReplicaRole.HUB:
try:
self.set(REPL_FLAGS, str(REPLICA_FLAGS_WRITE))
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
elif replicarole == ReplicaRole.CONSUMER and newrole == ReplicaRole.MASTER:
try:
self.apply_mods([(REPL_TYPE, str(REPLICA_RDWR_TYPE)),
(REPL_FLAGS, str(REPLICA_FLAGS_WRITE)),
(REPL_ID, str(rid))])
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
elif replicarole == ReplicaRole.HUB and newrole == ReplicaRole.MASTER:
try:
self.apply_mods([(REPL_TYPE, str(REPLICA_RDWR_TYPE)),
(REPL_ID, str(rid))])
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
def demote(self, newrole):
"""Demote a replica to a hub or consumer
:param newrole: The new replication role for the replica: CONSUMER and HUB
:type newrole: ReplicaRole
:returns: None
:raises: ValueError - If replica is not demoted
"""
# Check the role type
replicarole = self.get_role()
if newrole.value >= replicarole.value:
raise ValueError('Can not demote replica to higher or the same role: {} -> {}'.format(replicarole.name, newrole.name))
# Demote it - set the replica type, flags and rid
if replicarole == ReplicaRole.MASTER and newrole == ReplicaRole.HUB:
try:
self.apply_mods([(REPL_TYPE, str(REPLICA_RDONLY_TYPE)),
(REPL_ID, str(CONSUMER_REPLICAID))])
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
elif replicarole == ReplicaRole.MASTER and newrole == ReplicaRole.CONSUMER:
try:
self.apply_mods([(REPL_TYPE, str(REPLICA_RDONLY_TYPE)),
(REPL_FLAGS, str(REPLICA_FLAGS_RDONLY)),
(REPL_ID, str(CONSUMER_REPLICAID))])
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
elif replicarole == ReplicaRole.HUB and newrole == ReplicaRole.CONSUMER:
try:
self.set(REPL_FLAGS, str(REPLICA_FLAGS_RDONLY))
except ldap.LDAPError as e:
raise ValueError('Failed to update replica: ' + str(e))
def get_role(self):
"""Return the replica role
:returns: ReplicaRole.MASTER, ReplicaRole.HUB, ReplicaRole.CONSUMER
"""
repltype = self.get_attr_val_int(REPL_TYPE)
replflags = self.get_attr_val_int(REPL_FLAGS)
if repltype == REPLICA_RDWR_TYPE and replflags == REPLICA_FLAGS_WRITE:
replicarole = ReplicaRole.MASTER
elif repltype == REPLICA_RDONLY_TYPE and replflags == REPLICA_FLAGS_WRITE:
replicarole = ReplicaRole.HUB
elif repltype == REPLICA_RDONLY_TYPE and replflags == REPLICA_FLAGS_RDONLY:
replicarole = ReplicaRole.CONSUMER
else:
raise ValueError("Failed to determine a replica role")
return replicarole
def check_init(self, agmtdn):
"""Check that a total update has completed
:param agmtdn: The agreement DN
:type agmtdn: str
:returns: A tuple - first element is done/not done, 2nd is no error/has error
THIS SHOULD BE IN THE NEW AGREEMENT CLASS
"""
done, hasError = False, 0
attrlist = ['cn',
'nsds5BeginReplicaRefresh',
'nsds5replicaUpdateInProgress',
'nsds5ReplicaLastInitStatus',
'nsds5ReplicaLastInitStart',
'nsds5ReplicaLastInitEnd']
try:
entry = self._instance.getEntry(
agmtdn, ldap.SCOPE_BASE, "(objectclass=*)", attrlist)
except NoSuchEntryError:
self._log.exception("Error reading status from agreement {}".format(agmtdn))
hasError = 1
else:
refresh = entry.nsds5BeginReplicaRefresh
inprogress = entry.nsds5replicaUpdateInProgress
status = entry.nsds5ReplicaLastInitStatus
if not refresh: # done - check status
if not status:
print("No status yet")
elif status.find("replica busy") > -1:
print("Update failed - replica busy - status", status)
done = True
hasError = 2
elif status.find("Total update succeeded") > -1:
print("Update succeeded: status ", status)
done = True
elif inprogress.lower() == 'true':
print("Update in progress yet not in progress: status ",
status)
else:
print("Update failed: status", status)
hasError = 1
done = True
elif self.verbose:
print("Update in progress: status", status)
return done, hasError
def wait_init(self, agmtdn):
"""Initialize replication and wait for completion.
:param agmtdn: The agreement DN
:type agmtdn: str
:returns: 0 if the initialization is complete
THIS SHOULD BE IN THE NEW AGREEMENT CLASS
"""
done = False
haserror = 0
while not done and not haserror:
time.sleep(1) # give it a few seconds to get going
done, haserror = self.check_init(agmtdn)
return haserror
def start_and_wait(self, agmtdn):
"""Initialize an agreement and wait for it to complete
@param agmtdn - agreement dn
@return - 0 if successful
THIS SHOULD BE IN THE NEW AGREEMENT CLASS
"""
rc = self.start_async(agmtdn)
if not rc:
rc = self.wait_init(agmtdn)
if rc == 2: # replica busy - retry
rc = self.start_and_wait(agmtdn)
return rc
def start_async(self, agmtdn):
"""Initialize replication without waiting.
:param agmtdn: The agreement DN
:type agmtdn: str
:returns: None
THIS SHOULD BE IN THE NEW AGREEMENT CLASS
"""
self._log.info("Starting async replication %s" % agmtdn)
mod = [(ldap.MOD_ADD, 'nsds5BeginReplicaRefresh', 'start')]
self._instance.modify_s(agmtdn, mod)
def get_ruv_entry(self):
"""Return the database RUV entry
:returns: The database RUV entry
:raises: ValeuError - If suffix is not setup for replication
LDAPError - If there is a problem trying to search for the RUV
"""
try:
entry = self._instance.search_s(self._suffix,
ldap.SCOPE_SUBTREE,
REPLICA_RUV_FILTER)
if entry:
return entry[0]
else:
raise ValueError('Suffix (%s) is not setup for replication' % self._suffix)
except ldap.LDAPError as e:
raise e
def test(self, *replica_dirsrvs):
"""Make a "dummy" update on the the replicated suffix, and check
all the provided replicas to see if they received the update.
:param *replica_dirsrvs: DirSrv instance, DirSrv instance, ...
:type *replica_dirsrvs: list of DirSrv
:returns: True - if all servers have recevioed the update by this
replica, otherwise return False
:raises: LDAPError - when failing to update/search database
"""
# Generate a unique test value
test_value = ('test replication from ' + self._instance.serverid +
' to ' + replica_dirsrvs[0].serverid + ': ' +
str(int(time.time())))
self._instance.modify_s(self._suffix,
[(ldap.MOD_REPLACE, 'description', test_value)])
for replica in replica_dirsrvs:
loop = 0
replicated = False
while loop <= 30:
# Wait 60 seconds before giving up
try:
entry = replica.getEntry(self._suffix,
ldap.SCOPE_BASE,
'(objectclass=*)')
if entry.hasValue('description', test_value):
replicated = True
break
except ldap.LDAPError as e:
raise e
loop += 1
time.sleep(2) # Check the replica every 2 seconds
if not replicated:
self._log.error('Replication is not in sync with replica ' +
'server (%s)' % replica.serverid)
return False
# All is good, remove the test mod from the suffix entry
self._instance.modify_s(self._suffix,
[(ldap.MOD_DELETE, 'description', test_value)])
return True
class Replicas(DSLdapObjects):
"""Replica DSLdapObjects for all replicas
:param instance: A instance
:type instance: lib389.DirSrv
:param batch: Not implemented
:type batch: bool
"""
def __init__(self, instance, batch=False):
super(Replicas, self).__init__(instance=instance, batch=False)
self._objectclasses = [REPLICA_OBJECTCLASS_VALUE]
self._filterattrs = [REPL_ROOT]
self._childobject = Replica
self._basedn = DN_MAPPING_TREE
def get(self, selector=[], dn=None):
"""Get a child entry (DSLdapObject, Replica, etc.) with dn or selector
using a base DN and objectClasses of our object (DSLdapObjects, Replicas, etc.)
After getting the replica, update the replica._suffix parameter.
:param dn: DN of wanted entry
:type dn: str
:param selector: An additional filter to objectClasses, i.e. 'backend_name'
:type dn: str
:returns: A child entry
"""
replica = super(Replicas, self).get(selector, dn)
if replica:
# Get and set the replica's suffix
replica._suffix = replica.get_attr_val(REPL_ROOT)
return replica
def enable(self, suffix, role, replicaID=None, args=None):
"""Enable replication for this suffix
:param suffix: The suffix to enable replication for
:type suffix: str
:param role: MASTER, HUB and CONSUMER
:type role: ReplicaRole
:param replicaID: number that identify the supplier replica
(role=ReplicaRole.MASTER) in the topology.
For hub/consumer (role=ReplicaRole.HUB or
ReplicaRole.CONSUMER), rid value is not used.
This parameter is mandatory for supplier.
:type replicaID: int
:param args: A dictionary of additional replica properties
:type args: dict
:returns: Replica DSLdapObject
:raises: - InvalidArgumentError - if missing mandatory arguments
- ValueError - argument with invalid value
- LDAPError - failed to add replica entry
"""
# Normalize the suffix
suffix = normalizeDN(suffix)
# Check validity of role
if not role:
self._log.fatal("Replica.create: replica role is not specified (ReplicaRole.*)")
raise InvalidArgumentError("role missing")
if not Replica._valid_role(role):
self._log.fatal("enableReplication: replica role invalid (%s) " % role)
raise ValueError("invalid role: %s" % role)
# role is fine, set the replica type
if role == ReplicaRole.MASTER:
rtype = REPLICA_RDWR_TYPE
# check the validity of 'rid'
if not Replica._valid_rid(role, rid=replicaID):
self._log.fatal("Replica.create: replica role is master but " +
"'rid' is missing or invalid value")
raise InvalidArgumentError("rid missing or invalid value")
else:
rtype = REPLICA_RDONLY_TYPE
# Set the properties provided as mandatory parameter
properties = {'cn': 'replica',
REPL_ROOT: suffix,
REPL_ID: str(replicaID),
REPL_TYPE: str(rtype)}
# If the properties in args are valid add them to 'properties'
if args:
for prop in args:
if not inProperties(prop, REPLICA_PROPNAME_TO_ATTRNAME):
raise ValueError("unknown property: %s" % prop)
properties[prop] = args[prop]
# Set flags explicitly, so it will be more readable
if role == ReplicaRole.CONSUMER:
properties[REPL_FLAGS] = str(REPLICA_FLAGS_RDONLY)
else:
properties[REPL_FLAGS] = str(REPLICA_FLAGS_WRITE)
# Check if replica entry is already in the mapping-tree
try:
replica = self.get(suffix)
# Should we return an error, or just return the existing relica?
self._log.warn("Already setup replica for suffix %s" % suffix)
return replica
except ldap.NO_SUCH_OBJECT:
pass
# Create changelog
if (role == ReplicaRole.MASTER) or (role == ReplicaRole.HUB):
self._instance.changelog.create()
# Create the default replica manager entry if it does not exist
if REPL_BINDDN not in properties:
properties[REPL_BINDDN] = defaultProperties[REPLICATION_BIND_DN]
if REPLICATION_BIND_PW not in properties:
repl_pw = defaultProperties[REPLICATION_BIND_PW]
else:
repl_pw = properties[REPLICATION_BIND_PW]
# Remove this property so we don't add it to the replica entry
del properties[REPLICATION_BIND_PW]
ReplTools.createReplManager(self._instance,
repl_manager_dn=properties[REPL_BINDDN],
repl_manager_pw=repl_pw)
# Now create the replica entry
mtents = self._instance.mappingtree.list(suffix=suffix)
self._basedn = mtents[0].dn
replica = self.create(RDN_REPLICA, properties)
replica._suffix = suffix
return replica
def disable(self, suffix):
"""Disable replication on the suffix specified
:param suffix: Replicated suffix to disable
:type suffix: str
:returns: None
:raises: ValueError is suffix is not being replicated
"""
try:
replica = self.get(suffix)
except ldap.NO_SUCH_OBJECT:
raise ValueError('Suffix (%s) is not setup for replication' % suffix)
role = replica.get_role()
if role in (ReplicaRole.MASTER, ReplicaRole.HUB):
self._instance.changelog.delete()
try:
replica.delete()
except ldap.LDAPError as e:
raise ValueError('Failed to disable replication for suffix ' +
'(%s) LDAP error (%s)' % (suffix, str(e)))
def promote(self, suffix, newrole, binddn=None, rid=None):
"""Promote the replica to hub or master
:param newrole: The new replication role for the replica: MASTER and HUB
:type newrole: ReplicaRole
:param binddn: The replication bind dn - only applied to master
:type binddn: str
:param rid: The replication ID, applies only to promotions to "master"
:type rid: int
:returns: None
:raises: ValueError - If replica is not promoted
"""
replica = self.get(suffix)
try:
replica = self.get(suffix)
except ldap.NO_SUCH_OBJECT:
raise ValueError('Suffix (%s) is not setup for replication' % suffix)
replica.promote(newrole, binddn, rid)
def demote(self, suffix, newrole):
"""Demote a replica to a hub or consumer
:param newrole: The new replication role for the replica: CONSUMER and HUB
:type newrole: ReplicaRole
:returns: None
:raises: ValueError - If replica is not demoted
"""
replica = self.get(suffix)
try:
replica = self.get(suffix)
except ldap.NO_SUCH_OBJECT:
raise ValueError('Suffix (%s) is not setup for replication' % suffix)
replica.demote(newrole)
def get_dn(self, suffix):
"""Return the DN of the replica from cn=config, this is also
known as the mapping tree entry
:param suffix: The replication suffix to get the mapping tree DN
:type suffix: str
:returns: The DN of the replication entry from cn=config
"""
try:
replica = self.get(suffix)
except ldap.NO_SUCH_OBJECT:
raise ValueError('Suffix (%s) is not setup for replication' % suffix)
return replica._dn
def get_ruv_entry(self, suffix):
"""Return the database RUV entry for the provided suffix
:returns: The database RUV entry
:raises: - ValeuError - If suffix is not setup for replication
- LDAPError - If there is a problem trying to search for the RUV
"""
try:
replica = self.get(suffix)
except ldap.NO_SUCH_OBJECT:
raise ValueError('Suffix (%s) is not setup for replication' % suffix)
return replica.get_ruv_entry()
def test(self, suffix, *replica_dirsrvs):
"""Make a "dummy" update on the the replicated suffix, and check
all the provided replicas to see if they received the update.
:param suffix: The replicated suffix we want to check
:type suffix: str
:param *replica_dirsrvs: DirSrv instance, DirSrv instance, ...
:type *replica_dirsrvs: list of DirSrv
:returns: True - if all servers have received the update by this
replica, otherwise return False
:raises: LDAPError - when failing to update/search database
"""
try:
replica = self.get(suffix)
except ldap.NO_SUCH_OBJECT:
raise ValueError('Suffix (%s) is not setup for replication' % suffix)
return replica.test(*replica_dirsrvs)
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