openldap-technical

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9937 discussions

Configure Mirror Mode Replication
by Clint Petty 27 Aug '13

27 Aug '13

I am wanting to implement Mirror Mode Replication. I am using OpenLDAP 2.4.23 on CentOS 6.4, which uses cn=config format, that does not have a slapd.conf file. The instructions say to add the following to the slapd.conf file: database bdb suffix dc=Example,dc=com rootdn dc=Example,dc=com directory /var/ldap/db index objectclass,entryCSN,entryUUID eq overlay syncprov syncprov-checkpoint 100 10 syncprov-sessionlog 100 MirrorMode node 1: # Global section serverID 1 # database section # syncrepl directive syncrepl rid=001 provider=ldap://ldap-sid2.example.com bindmethod=simple binddn="cn=mirrormode,dc=example,dc=com" credentials=mirrormode searchbase="dc=example,dc=com" schemachecking=on type=refreshAndPersist retry="60 +" mirrormode on MirrorMode node 2: # Global section serverID 2 # database section # syncrepl directive syncrepl rid=001 provider=ldap://ldap-sid1.example.com bindmethod=simple binddn="cn=mirrormode,dc=example,dc=com" credentials=mirrormode searchbase="dc=example,dc=com" schemachecking=on type=refreshAndPersist retry="60 +" mirrormode on Since there is no slapd.conf file, how do I configure replication in a cn=config format? Do I need to run a slapadd or ldapadd command? Syntax? What files do I need to create, and where? Thanks in advance.

2 1

Slapd - Back-ldap Chain overlay: Proxied Authorization Denied
by Raul Hernandez 27 Aug '13

27 Aug '13

Hello! I've implemented a simple openldap master and consumer architecture. To achieved this, I had to implement back-ldap chain overlay (in order to have a read only "slave"), and syncprov overlay, to synchronize data from master to the slave. This implementation works fine. I have data from the master, replicated into the slave. When I try to modify an object from the consumer using the administrative account "cn=admin,dc=company,dc=com", references the modify command to the master. The master performs the operation and returns the consumer the operation result. When I try to perform any modify operation with another authorized account, I get the following error *LDAP said*:Proxied Authorization Denied*Error number*:0x7b ()*Description*: The account has permission to write the whole tree in both, the master and the slave. Here is my config on both servers: #------- # Master #------- dn: cn=module,cn=config changetype: add objectClass: olcModuleList cn: module olcModulePath: /usr/lib/ldap olcModuleLoad: syncprov dn: olcOverlay=syncprov,olcDatabase={1}hdb,cn=config changetype: add objectClass: olcOverlayConfig objectClass: olcSyncProvConfig olcOverlay: syncprov dn: olcDatabase={1}hdb,cn=config changetype: modify replace: olcAccess olcAccess: {0}to attrs=userPassword,shadowLastChange by self write by anonymous auth by dn="cn=admin,dc=company,dc=com" write by dn="cn=idm,ou=Seguridad,dc=company,dc=comdc=company,dc=com" write by anonymous read by * none olcAccess: {1}to attrs=shadowWarning,shadowMax,shadowMin by self write by dn="cn=admin,dc=company,dc=com" write by dn="cn=idm,ou=Seguridad,dc=company,dc=com" write by anonymous read by * none olcAccess: {2}to dn.base="" by * read olcAccess: {3}to * by self write by dn="cn=admin,dc=company,dc=com" write by dn="cn=idm,ou=Seguridad,dc=company,dc=com" write by * read #------- # Consumer #------- dn: cn=module,cn=config changetype: add objectClass: olcModuleList cn: module olcModulePath: /usr/lib/ldap olcModuleLoad: syncprov olcModuleLoad: back_ldap dn: olcOverlay=syncprov,olcDatabase={1}hdb,cn=config changetype: add objectClass: olcOverlayConfig objectClass: olcSyncProvConfig olcOverlay: syncprov dn: olcDatabase={1}hdb,cn=config changetype: modify add: olcSyncRepl olcSyncRepl: rid=001 provider=ldap://192.168.123.139binddn="cn=syncReplUser,ou=Seguridad,dc=bandes,dc=gob,dc=ve" bindmethod=simple credentials=0p3n1d4pPr0d% searchbase="dc=bandes,dc=gob,dc=ve" type=refreshAndPersist scope=sub retry="5 10 10 +" timeout=1 sizelimit=unlimited schemachecking=on - add: olcUpdateRef olcUpdateRef: ldap://192.168.123.139 dn: olcOverlay=chain,olcDatabase={-1}frontend,cn=config changetype: add objectClass: olcOverlayConfig objectClass: olcChainConfig olcOverlay: chain olcChainReturnError: TRUE olcChainMaxReferralDepth: 1 dn: olcDatabase=ldap,olcOverlay={0}chain,olcDatabase={-1}frontend,cn=config changetype: add objectClass: olcLDAPConfig objectClass: olcChainDatabase olcDatabase: ldap olcDbURI: ldap://192.168.123.139 olcDbRebindAsUser: TRUE olcDbChaseReferrals: TRUE olcDbProxyWhoAmI: TRUE olcDbNoRefs: FALSE olcDBIDAssertAuthzFrom: * olcDBACLBind: bindmethod="simple" binddn="cn=syncReplUser,ou=Seguridad,dc=bandes,dc=gob,dc=ve" credentials=0p3n1d4pPr0d% olcDbIDAssertBind: bindmethod="simple" binddn="cn=syncReplUser,ou=Seguridad,dc=bandes,dc=gob,dc=ve" credentials=0p3n1d4pPr0d% mode="self" flags="prescriptive,proxy-authz-non-critical" Hope someone can help me out! Thanks in advanced

1 0

Replication setup
by Vishesh kumar 27 Aug '13

27 Aug '13

Hi Members, I am good in openldap basics but new in Replication. I am trying to setup replication on CentOS 6 systems. OpenLDAP version is 2.4.23-32.el6_4.1.x86_64. I loaded syncprov module using following ldif file on both the provider and consumer +++++++++ dn: cn=module,cn=config ObjectClass: olcModuleList cn: Module olcModulepath: /usr/lib64/openldap/ olcModuleLoad: syncprov.la +++++++++ I also configured replica database on consumer as following +++++++++ olcsyncrepl: rid=101 provider=ldap://192.168.10.1:389 type=refreshOnly interval= 00:05:00:00 searchbase="dc=l,dc=local" scope=sub bindmethod=simple binddn="cn=Man ager,dc=l,dc=local" credentials=xxxx +++++++++++++++++++++++++++++ Above configuration is not replicating database. Am I missing something? -- Vishesh Kumar

2 1

sambaSamAccount Problem
by felas 27 Aug '13

27 Aug '13

Hi, i have a ldif file with a objectClass: sambaSamAccount objectClass: posixAccount so i add follow this guide: https://help.ubuntu.com/12.04/serverguide/samba-ldap.html the samba.schema and samba.ldif. I restart slapd, but still not found, because if i try to change this: objectClass: inetOrgPerson objectClass: posixAccount it's work.. but with sambaSamAccount not..

1 0

Openldap configuration import LDIF
by felas 27 Aug '13

27 Aug '13

hi, i have install OpenLdap in a UbuntuServer, in virtual with VirtualBox. Now i want to import in Eclipse via Ldap Browser one file LDIF. I have a FQDN like this, ldap.***.***.com, and i add this in /etc/hosts this FQDN with a ip address 192.168.1.156, the ip is my Server. Now the problem, when i try to import Ldif, i have the problem with auth, i know i must change something in a slapd config but what?

5 21

Re: How to check whether OpenLDAP server is provider or consumer ?
by pramod kulkarni 27 Aug '13

27 Aug '13

Hi, Thanks for the reply. I have a rootdn,How to query the updateref setting ? waiting for your inputs Regards, Pramod On Sat, Aug 24, 2013 at 12:51 AM, Quanah Gibson-Mount <quanah(a)zimbra.com>wrote: > --On Friday, August 23, 2013 3:53 PM +0530 pramod kulkarni < > pammu.kulkarni(a)gmail.com> wrote: > > >> I am trying to notify a system to check if the openLDAP server is >> provider or consumer.I can do this by getting a referral error on the >> consumer side whenever I try to write something on the server , but is >> their any other way to check if OpenLDAP is provider or consumer without >> writing to it ? . >> > > You could query for the updateref setting if you are using cn=config out > of the config DB, but that'd require the rootdn? Or, you could just set up > slapo-chain on your replica, and then it doesn't matter. > > --Quanah > > -- > > Quanah Gibson-Mount > Lead Engineer > Zimbra, Inc > -------------------- > Zimbra :: the leader in open source messaging and collaboration >

3 5

[LMDB] Support for secondary index
by Alain 26 Aug '13

26 Aug '13

I am trying to port an application that currently uses BDB and I'm stuck with how to implement secondary indexes with LMDB. Can you point me in the right direction here. Thanks Alain

2 1

Re: OpenLDAP 2.4.36 available
by Clément OUDOT 23 Aug '13

23 Aug '13

Hi, LTB project RPMs for OpenLDAP 2.4.36 are available: http://tools.ltb-project.org/news/40 I also created a yum repository to ease the installation: http://ltb-project.org/wiki/documentation/openldap-rpm#yum_repository Clément.

6 7

Issues arising from creating powerdns backend based on LMDB
by Mark Zealey 23 Aug '13

23 Aug '13

Hi Howard, I've now got lmdb working with powerdns in place of kyoto - nice and easy to do thanks! Maximum DNS query load is a little better - about 10-30% depending on use-case, but for us the main gain is that you can have a writer going on at the same time - I was struggling a bit with how to push updates from a different process using kyoto. There's a few issues and things I'd like to comment on though: 1) Can you update documentation to explain what happens when I do a mdb_cursor_del() ? I am assuming it advances the cursor to the next record (this seems to be the behaviour). However there is some sort of bug with this assumption. Basically I have a loop which jumps (MDB_SET_RANGE) to a key and then wants to do a delete until key is like something else. So I do while(..) { mdb_cursor_del(), mdb_cursor_get(..., MDB_GET_CURRENT)}. This works fine mostly, but roughly 1% of the time I get EINVAL returned when I try to MDB_GET_CURRENT after a delete. This always seems to happen on the same records - not sure about the memory structure but could it be something to do with hitting a page boundary somehow invalidating the cursor? At the moment I just catch that and then do an MDB_NEXT to skip over them but this will be an issue for us on live. This is from perl so it /may/ be that, or the version of lmdb that is shipped with it however the perl layer is a very thin wrapper and looking at the code I can only think it comes from lmdb. 2) Currently, because kyoto cabinet didn't have support for multiple identical keys we don't use the DUP options. This leads to quite long keys (1200-1300 bytes in some cases). In the future, it would be nice to have a run-time keylength specifier or something along those lines. 3) Perhaps a mdb_cursor_get_key() function (like kyoto) which doesn't return the data (just the key). As in (2) we store all the data in the key - not sure how much of a performance difference this would make though 4) Creating database with non-sequential keys is very bad (on 4gb databases, 2* slower than kyoto - about 1h30 and uses more memory). I spent quite a bit of time looking at this in perl and then C. Basically I create a database, open 1 txn and then insert a bunch of unordered keys. Up to about 500mb it's fine and nice and quick - from perl about 75k inserts/sec (slow mostly because it's reading from mysql). However after than first 500mb it starts flushing to disk. In a sequential insert case the flush is very quick - 100-200mb/sec or so. However on non-sequential insert I've seen it drop to like 4 or 5mb/sec as it's writing data all over the disk rather than big sequential writes. iostat shows the same ~200tps of write, 100% usage but only 4-10mb/sec of bytes being written. However, even when it's not flushing (or when storing data on SSD or memdisk), after the first 500mb performance massively drops off to perhaps 10-15k inserts/sec. At the same time, looking at `top`, once the residential memory hits about 500mb, the 'shared memory' starts being used and residential just keeps on increasing. I'm not sure if this is some kind of kernel accounting thing to do with mmap usage but it doesn't happen for sequential key inserts (for those, shared mem stays around 0, residential stays 500mb). I'm using centos 6 with various different kernels from default to 3.7.5 and the behaviour is the same. I don't really know how to go about looking for the root cause of this but I'm pretty sure that whilst the IO is crippling it in places there is something else going on of which the shared memory increase is a sign. I've tried using the WRITEMAP option too which doesn't seem to affect anything significantly in terms of performance or memory usage. 5) pkgconfig/rpms would be really nice to have. Or do you expect it to just be bundled with a project as eg the perl module does? Thanks, Mark

3 18

How to check whether OpenLDAP server is provider or consumer ?
by pramod kulkarni 23 Aug '13

23 Aug '13

I am trying to notify a system to check if the openLDAP server is provider or consumer.I can do this by getting a referral error on the consumer side whenever I try to write something on the server , but is their any other way to check if OpenLDAP is provider or consumer without writing to it ? .

2 1

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openldap-technical