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Re: OpenLDAP Mirror Mode configuration



The "type" should be "refreshAndPersist" instead of "refreshOnly" in your syncrepl configuration.  I'd also recommend upgrading to at least version 2.4.15 as some mirror mode issues were fixed.

On Tue, Jun 23, 2009 at 2:36 AM, Fernando Silva <fernandolrsilva@gmail.com> wrote:
Hi all,

I'm trying to setup a Mirror Mode configuration using 2 machines running OpenLDAP v2.4.11 on both. To make things easy both machines are on the same (private) network.

Here's a sample of both my slapd.conf:
Machine 1:
-----------
include         /etc/ldap/schema/core.schema
include         /etc/ldap/schema/cosine.schema
include         /etc/ldap/schema/nis.schema
include         /etc/ldap/schema/inetorgperson.schema
pidfile         /var/run/slapd/slapd.pid
argsfile        /var/run/slapd/slapd.args

##### Mirror Mode
serverID    001

loglevel        16384
modulepath      /usr/lib/ldap
moduleload      back_hdb
moduleload      syncprov.la
moduleload      syncprov.so
sizelimit 500
tool-threads 1
backend         hdb
database        hdb

suffix          "dc=MyDomain"
rootdn          "cn=admin,dc=MyDomain"
rootpw          {SSHA}secret
directory       "/var/lib/ldap"
dbconfig set_cachesize 0 2097152 0
dbconfig set_lk_max_objects 1500
dbconfig set_lk_max_locks 1500
dbconfig set_lk_max_lockers 1500
lastmod         on
checkpoint      512 30

access to *
      by dn="cn=admin,dc=MyDomain" write
      by * read

# Consumer
syncrepl rid=001
      provider=ldap://192.168.1.2
      bindmethod=simple
      binddn="cn=admin,dc=MyDomain"
      credentials=secret
      searchbase="dc=MyDomain"
      attrs="*,+"
      schemachecking=off
      type=refreshOnly
      interval=00:00:1:00 #forcing to be only one minute
      retry="10 10 60 10 +"

index objectClass                       eq,pres
index ou,cn,mail,surname,givenname      eq,pres,sub
index uidNumber,gidNumber,loginShell    eq,pres
index uid,memberUid                     eq,pres,sub
index nisMapName,nisMapEntry            eq,pres,sub
index objectclass,entryCSN,entryUUID    eq

# Provider
overlay syncprov
syncprov-checkpoint 50 1
syncprov-sessionlog 50

mirrormode on

Machine 2:
-----------
include         /etc/ldap/schema/core.schema
include         /etc/ldap/schema/cosine.schema
include         /etc/ldap/schema/nis.schema
include         /etc/ldap/schema/inetorgperson.schema
pidfile         /var/run/slapd/slapd.pid
argsfile        /var/run/slapd/slapd.args

##### Mirror Mode
serverID    002

loglevel        16384
modulepath      /usr/lib/ldap
moduleload      back_hdb
moduleload      syncprov.la
moduleload      syncprov.so
sizelimit 500
tool-threads 1
backend         hdb
database        hdb

suffix          "dc=MyDomain"
rootdn          "cn=admin,dc=MyDomain"
rootpw          {SSHA}secret
directory       "/var/lib/ldap"
dbconfig set_cachesize 0 2097152 0
dbconfig set_lk_max_objects 1500
dbconfig set_lk_max_locks 1500
dbconfig set_lk_max_lockers 1500
lastmod         on
checkpoint      512 30

access to *
      by dn="cn=admin,dc=MyDomain" write
      by * read

# Consumer
syncrepl rid=001
      provider=ldap://192.168.1.1
      bindmethod=simple
      binddn="cn=admin,dc=MyDomain"
      credentials=secret
      searchbase="dc=MyDomain"
      attrs="*,+"
      schemachecking=off
      type=refreshOnly
      interval=00:00:1:00 #forcing to be only one minute
      retry="10 10 60 10 +"

index objectClass                       eq,pres
index ou,cn,mail,surname,givenname      eq,pres,sub
index uidNumber,gidNumber,loginShell    eq,pres
index uid,memberUid                     eq,pres,sub
index nisMapName,nisMapEntry            eq,pres,sub
index objectclass,entryCSN,entryUUID    eq

# Provider
overlay syncprov
syncprov-checkpoint 50 1
syncprov-sessionlog 50

mirrormode on

I'm using Ubuntu 8.10 inside a VMWare image, but both images are running on independent machines and the network on both is Bridge Mode. All seems well according to OpenLDAP manual, but maybe I'm missing something. I start both servers using "slapd -d sync" in order to filter only the sync part.

I created a script to insert 200 employees in my directory, to force the servers to sync up. When I start both servers and insert the employees in machine 1, I get this too much lines with this sample:
slap_queue_csn: queing 0xb6851b4a 20090623082909.571025Z#000000#000#000000
slap_graduate_commit_csn: removing 0xb82165c8 20090623082909.571025Z#000000#000#000000

So the CSN is being created (I think), but there's no sync to machine 2, which makes me frustated. . .

I'd appreciate any comments you can have, especially if you already have this kind of setup running.

Best regards,
Fernando