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Re: N-way multi master configuration issue

To: openldap-technical@openldap.org
Subject: Re: N-way multi master configuration issue
From: Dmitriy Kirhlarov <dimma@higis.ru>
Date: Wed, 31 Aug 2011 08:47:08 +0400
In-reply-to: <4A4577058A416A4B979BCD934AD213D00B72F3@GUREXMB02.ASIAN.AD.ARICENT.COM>
References: <4A4577058A416A4B979BCD934AD213D02A7DCF@GUREXMB02.ASIAN.AD.ARICENT.COM> <201108261526.22645.bgmilne@staff.telkomsa.net> <4A4577058A416A4B979BCD934AD213D02A7E32@GUREXMB02.ASIAN.AD.ARICENT.COM> <201108261545.15652.bgmilne@staff.telkomsa.net>, <4DD67EA1E076B6468D016960A738DF0C0BA0AC2358@GUREXMB02.ASIAN.AD.ARICENT.COM> <4A4577058A416A4B979BCD934AD213D00B72F3@GUREXMB02.ASIAN.AD.ARICENT.COM>
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On 08/30/2011 10:15 PM, Naga Chaitanya Palle wrote:

Hi,

I was able to get the syncronization working between 2 providers.
I had to remove data on both the servers and start from beginning.
It worked.

Now i am facing another issue.
In case of single provider-client configuration, fot tls, i used to generate certificate on server and copy the same certificate to client for encrypted communication between provider and client.

Now in case of N-way multimaster, i created server1 certificate and copied that certificate to server2 and vice versa. but there is no communication happening between the servers now.

Can you please let me know how to use tls with N-way multimaster for N=2 and N>2.

1. You can use one certificate with several names(http://therowes.net/~greg/2008/01/08/creating-a-certificate-with-multiple-hostnames/)2. or you can use one certificate per host (name inside certificateshould be the same, as dns-name for clients connections)

WBR

Thanks and Regards,
Naga Chaitanya
________________________________________
From: Naga Chaitanya Palle
Sent: Monday, August 29, 2011 1:37 PM
To: Buchan Milne
Cc: openldap-technical@openldap.org
Subject: RE: N-way multi master configuration issue

Hi Buchan,

After making the changes are per your suggestions, I am still not able to read data between the servers.

Also, I deleted DI data on server 2 and restarted to import data from server1 , but no use.
Can you please check the slapd.conf files and suggest.

Server 1 slapd.conf file
#
# See slapd.conf(5) for details on configuration options.
# This file should NOT be world readable.
#
include         /usr/share/openldap2.4/schema/sudo.schema
include         /usr/share/openldap2.4/schema/core.schema
include         /usr/share/openldap2.4/schema/cosine.schema
include         /usr/share/openldap2.4/schema/inetorgperson.schema
include         /usr/share/openldap2.4/schema/nis.schema
include         /usr/share/openldap2.4/schema/misc.schema
include         /usr/share/openldap2.4/schema/openldap.schema
include         /usr/share/openldap2.4/schema/ppolicy.schema
include         /usr/share/openldap2.4/schema/corba.schema

loglevel        296

# Allow LDAPv2 client connections.  This is NOT the default.
allow bind_v2

# Do not enable referrals until AFTER you have a working directory
# service AND an understanding of referrals.
#referral       ldap://root.openldap.org

pidfile         /var/run/ldap2.4/slapd.pid
argsfile        /var/run/ldap2.4/slapd.args

access to attrs=userPassword
       by self write
       by users read
       by anonymous auth

#access to attrs=shadowLastChange
  #     by self write
   #    by * auth

access to *
       by * read

access to *
      by dn.base="cn=Manager,dc=comverse-in,dc=com" read
      by * break

# Load dynamic backend modules:
# modulepath    /usr/lib/openldap

# dummy test certificate which you can generate by changing to
# /etc/pki/tls/certs, running "make slapd.pem", and fixing permissions on
# slapd.pem so that the ldap user or group can read it.  Your client software
# may balk at self-signed certificates, however.
# TLSCACertificateFile /etc/pki/tls/certs/ca-bundle.crt
# TLSCertificateFile /etc/pki/tls/certs/slapd.pem
# TLSCertificateKeyFile /etc/pki/tls/certs/slapd.pem

#TLSCipherSuite HIGH:MEDIUM:+SSLv2
#TLSCACertificateFile /etc/openldap2.4/cacerts/cacert.pem
#TLSCertificateFile /etc/openldap2.4/cacerts/slapd-cert.pem
#TLSCertificateKeyFile /etc/openldap2.4/cacerts/slapd-key.pem

# Sample security restrictions
#       Require integrity protection (prevent hijacking)
#       Require 112-bit (3DES or better) encryption for updates
#       Require 63-bit encryption for simple bind
# security ssf=1 update_ssf=112 simple_bind=64

# Sample access control policy:
#       Root DSE: allow anyone to read it
#       Subschema (sub)entry DSE: allow anyone to read it
#       Other DSEs:
#               Allow self write access
#               Allow authenticated users read access
#               Allow anonymous users to authenticate
#       Directives needed to implement policy:
# access to dn.base="" by * read
# access to dn.base="cn=Subschema" by * read
# access to *
#       by self write
#       by users read
#       by anonymous auth
#
# if no access controls are present, the default policy
# allows anyone and everyone to read anything but restricts
# updates to rootdn.  (e.g., "access to * by * read")
#
# rootdn can always read and write EVERYTHING!

#######################################################################
# ldbm and/or bdb database definitions
#######################################################################
serverId         001

database         bdb
suffix   "dc=comverse-in,dc=com"
rootdn   "cn=Manager,dc=comverse-in,dc=com"
rootpw          {SSHA}9tKeVZfgKFCfgIFQxXt5esH0HhQk1dIS

# Cleartext passwords, especially for the rootdn, should
# be avoided.  See slappasswd(8) and slapd.conf(5) for details.
# Use of strong authentication encouraged.
# rootpw                secret
# rootpw                {crypt}ijFYNcSNctBYg

# The database directory MUST exist prior to running slapd AND
# should only be accessible by the slapd and slap tools.
# Mode 700 recommended.

directory       /var/lib/ldap2.4

# Indices to maintain for this database
#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       sudoUser        eq

index       sudoUser        eq
index       member          eq
index ou,cn,mail,surname,givenname      eq,pres,sub
index uidNumber,gidNumber,loginShell    eq,pres
index uid,memberUid                     eq,pres,sub
#index objectclass,entryCSN,entryUUID eq

# Load dynamic backend modules:
# modulepath    /usr/lib/openldap

modulepath      /usr/lib/openldap2.4

# modules available in openldap-servers-overlays RPM package:
# moduleload accesslog.la
# moduleload auditlog.la
# moduleload denyop.la
# moduleload dyngroup.la
# moduleload dynlist.la
# moduleload lastmod.la
# moduleload pcache.la
moduleload ppolicy.la
# moduleload refint.la
# moduleload retcode.la
# moduleload rwm.la
# moduleload smbk5pwd.la
moduleload syncprov.la
# moduleload translucent.la
# moduleload unique.la
# moduleload valsort.la

# modules available in openldap-servers-sql RPM package:
# moduleload back_sql.la
syncrepl rid=123
                 provider=ldap://devonly144.comverse-in.com
                 type=refreshAndPersist
                 interval=00:00:01:00
                 searchbase="dc=comverse-in,dc=com"
                 filter="(objectClass=*)"
                 scope=sub
                 attrs="*"
                 schemachecking=off
                 bindmethod=simple
                 binddn="cn=Manager,dc=comverse-in,dc=com"
                 credentials=sonora

index objectClass,entryCSN,entryUUID                       eq
mirrormode true

overlay syncprov
syncprov-checkpoint 100 10

overlay ppolicy
ppolicy_default "cn=DefaultPassword,ou=pwpolicies,dc=comverse-in,dc=com"
ppolicy_hash_cleartext
ppolicy_use_lockout

#SUDOERS_BASE=ou=SUDOers,dc=comverse-in,dc=com

# Replicas of this database
#replogfile /var/lib/ldap/openldap-master-replog
#replica host=ldap-1.example.com:389 starttls=critical
#     bindmethod=sasl saslmech=GSSAPI
#     authcId=host/ldap-master.example.com@EXAMPLE.COM

#replogfile /var/lib/ldap/openldap-master-replog
#replica uri=ldaps://rht144.comverse-in.com:389 starttls=critical

Server2 slapd.conf file
#
# See slapd.conf(5) for details on configuration options.
# This file should NOT be world readable.
#
include         /usr/share/openldap2.4/schema/sudo.schema
include         /usr/share/openldap2.4/schema/core.schema
include         /usr/share/openldap2.4/schema/cosine.schema
include         /usr/share/openldap2.4/schema/inetorgperson.schema
include         /usr/share/openldap2.4/schema/nis.schema
include         /usr/share/openldap2.4/schema/misc.schema
include         /usr/share/openldap2.4/schema/openldap.schema
include         /usr/share/openldap2.4/schema/ppolicy.schema
include         /usr/share/openldap2.4/schema/corba.schema

loglevel        296

# Allow LDAPv2 client connections.  This is NOT the default.
allow bind_v2

# Do not enable referrals until AFTER you have a working directory
# service AND an understanding of referrals.
#referral       ldap://root.openldap.org

pidfile         /var/run/ldap2.4/slapd.pid
argsfile        /var/run/ldap2.4/slapd.args

access to attrs=userPassword
       by self write
       by users read
       by anonymous auth

#access to attrs=shadowLastChange
  #     by self write
   #    by * auth

access to *
       by * read

access to *
      by dn.base="cn=Manager,dc=comverse-in,dc=com" read
      by * break

# Load dynamic backend modules:
# modulepath    /usr/lib/openldap

# dummy test certificate which you can generate by changing to
# /etc/pki/tls/certs, running "make slapd.pem", and fixing permissions on
# slapd.pem so that the ldap user or group can read it.  Your client software
# may balk at self-signed certificates, however.
# TLSCACertificateFile /etc/pki/tls/certs/ca-bundle.crt
# TLSCertificateFile /etc/pki/tls/certs/slapd.pem
# TLSCertificateKeyFile /etc/pki/tls/certs/slapd.pem

#TLSCipherSuite HIGH:MEDIUM:+SSLv2
#TLSCACertificateFile /etc/openldap2.4/cacerts/cacert.pem
#TLSCertificateFile /etc/openldap2.4/cacerts/slapd-cert.pem
#TLSCertificateKeyFile /etc/openldap2.4/cacerts/slapd-key.pem

# Sample security restrictions
#       Require integrity protection (prevent hijacking)
#       Require 112-bit (3DES or better) encryption for updates
#       Require 63-bit encryption for simple bind
# security ssf=1 update_ssf=112 simple_bind=64

# Sample access control policy:
#       Root DSE: allow anyone to read it
#       Subschema (sub)entry DSE: allow anyone to read it
#       Other DSEs:
#               Allow self write access
#               Allow authenticated users read access
#               Allow anonymous users to authenticate
#       Directives needed to implement policy:
# access to dn.base="" by * read
# access to dn.base="cn=Subschema" by * read
# access to *
#       by self write
#       by users read
#       by anonymous auth
#
# if no access controls are present, the default policy
# allows anyone and everyone to read anything but restricts
# updates to rootdn.  (e.g., "access to * by * read")
#
# rootdn can always read and write EVERYTHING!

#######################################################################
# ldbm and/or bdb database definitions
#######################################################################
serverId         002

#database       bdb
database         bdb
#suffix         "dc=comverse-in,dc=com"
suffix   "dc=comverse-in,dc=com"
#rootdn         "cn=Manager,dc=comverse-in,dc=com"
rootdn   "cn=Manager,dc=comverse-in,dc=com"
rootpw          {SSHA}4qLml3DcOyfwiKlN/garIms4a8fmsNkx
#rootpw                 sonora

# Cleartext passwords, especially for the rootdn, should
# be avoided.  See slappasswd(8) and slapd.conf(5) for details.
# Use of strong authentication encouraged.
# rootpw                secret
# rootpw                {crypt}ijFYNcSNctBYg

# The database directory MUST exist prior to running slapd AND
# should only be accessible by the slapd and slap tools.
# Mode 700 recommended.

directory       /var/lib/ldap2.4

# Indices to maintain for this database
#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       sudoUser        eq

index       sudoUser        eq
index       member          eq
index ou,cn,mail,surname,givenname      eq,pres,sub
index uidNumber,gidNumber,loginShell    eq,pres
index uid,memberUid                     eq,pres,sub
#index objectclass,entryCSN,entryUUID eq

# Load dynamic backend modules:
# modulepath    /usr/lib/openldap

modulepath      /usr/lib/openldap2.4

# modules available in openldap-servers-overlays RPM package:
# moduleload accesslog.la
# moduleload auditlog.la
# moduleload denyop.la
# moduleload dyngroup.la
# moduleload dynlist.la
# moduleload lastmod.la
# moduleload pcache.la
moduleload ppolicy.la
# moduleload refint.la
# moduleload retcode.la
# moduleload rwm.la
# moduleload smbk5pwd.la
moduleload syncprov.la
# moduleload translucent.la
# moduleload unique.la
# moduleload valsort.la

# modules available in openldap-servers-sql RPM package:
# moduleload back_sql.la

overlay ppolicy
ppolicy_default "cn=DefaultPassword,ou=pwpolicies,dc=comverse-in,dc=com"
ppolicy_hash_cleartext
ppolicy_use_lockout

#SUDOERS_BASE=ou=SUDOers,dc=comverse-in,dc=com

# Replicas of this database
#replogfile /var/lib/ldap/openldap-master-replog
#replica host=ldap-1.example.com:389 starttls=critical
#     bindmethod=sasl saslmech=GSSAPI
#     authcId=host/ldap-master.example.com@EXAMPLE.COM

#replogfile /var/lib/ldap/openldap-master-replog
#replica uri=ldaps://rht144.comverse-in.com:389 starttls=critical binddn="cn=Manager,dc=comverse-in,dc=com" bindmethod=simple credentials=sonora
#serverId       2
syncrepl rid=124
                 provider=ldap://uplite98.comverse-in.com
                 type=refreshAndPersist
                 interval=00:00:01:00
                 searchbase="dc=comverse-in,dc=com"
                 filter="(objectClass=*)"
                 scope=sub
                 attrs="*"
                 schemachecking=off
                 bindmethod=simple
                 binddn="cn=Manager,dc=comverse-in,dc=com"
                 credentials=sonora
#updateref       ldap://uplite98.comverse-in.com

index objectClass,entryCSN,entryUUID                       eq

mirrormode true

overlay syncprov
syncprov-checkpoint 100 10

Thanks and Regards,
Naga Chaitanya

-----Original Message-----
From: Buchan Milne [mailto:bgmilne@staff.telkomsa.net]
Sent: Friday, August 26, 2011 7:15 PM
To: Naga Chaitanya Palle
Cc: openldap-technical@openldap.org
Subject: Re: N-way multi master configuration issue

On Friday, 26 August 2011 15:28:13 Naga Chaitanya Palle wrote:

Hi buchan,

My server 1 is uplite98.comverse-in.com. In its slapd.conf, I have syncrepl
pointing to server 2 devonly144.comverse-in.com and vice versa for
server2.


Then your serverid (and, it should actually be serverId) is wrong:

serverid        124       ldap://devonly144.comverse-in.com
syncrepl rid=124

                 provider=ldap://devonly144.comverse-in.com:389


The URI form of serverId is useful if you have the same configuration on all
your masters, in which case the listening address of your server must match
one of the URIs. You may want to use this form for now:

serverId 1

If your serverId's weren't correct (check the contextCSNs), you should
probably re-import an export of one server on the other one.

I did not exactly understand what you indicated.
Can you please be more specific about what changes needs to be done in the
slapd.conf file?


In a multi-master setup, each server should be replicating off *all* servers,
including itself.

Thanks and Regards,
Naga Chaitanya

-----Original Message-----
From: Buchan Milne [mailto:bgmilne@staff.telkomsa.net]
Sent: Friday, August 26, 2011 6:56 PM
To: openldap-technical@openldap.org
Cc: Naga Chaitanya Palle
Subject: Re: N-way multi master configuration issue

On Friday, 26 August 2011 12:56:38 Naga Chaitanya Palle wrote:

Hi,

I am trying to set up N-way multimaster configuration using syncrepl on
openldap2.4 for RHEL 5.4

Currently I am using two masters for testing.

The slapd.conf on server1 is
moduleload syncprov.la
serverid        124       ldap://devonly144.comverse-in.com
syncrepl rid=124

                 provider=ldap://devonly144.comverse-in.com:389
                 type=refreshAndPersist
                 interval=00:00:01:00
                 searchbase="dc=comverse-in,dc=com"
                 filter="(objectClass=*)"
                 scope=sub
                 attrs="*"
                 schemachecking=off
                 bindmethod=simple
                 binddn="cn=Manager,dc=comverse-in,dc=com"
                 credentials=sonora

index objectClass,entryCSN,entryUUID                       eq
mirrormode true

overlay syncprov
syncprov-checkpoint 100 10


The slapd.conf on server2 is
moduleload syncprov.la
serverid        123       ldap://uplite98.comverse-in.com
syncrepl rid=123

                 provider=ldap://uplite98.comverse-in.com:389
                 type=refreshAndPersist
                 interval=00:00:01:00
                 searchbase="dc=comverse-in,dc=com"
                 filter="(objectClass=*)"
                 scope=sub
                 attrs="*"
                 schemachecking=off
                 bindmethod=simple
                 binddn="cn=Manager,dc=comverse-in,dc=com"
                 credentials=sonora

index objectClass,entryCSN,entryUUID                       eq
mirrormode true

overlay syncprov
syncprov-checkpoint 100 10

But there is no data synchronization happening between the severs.


Of course not, you have configured each server only to replicate from
itself.

When I added test3 user on server1, it is not reflecting on server 2.
Same way when I added test4 user on server2 it is not reflecting on
server1.

Please let me know what is missing in this configuration.


syncrepl statements pointing to the other master.

Regards,
Buchan




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References:
- N-way multi master configuration issue
  - From: Naga Chaitanya Palle <Naga.Chaitanya@aricent.com>
- Re: N-way multi master configuration issue
  - From: Buchan Milne <bgmilne@staff.telkomsa.net>
- RE: N-way multi master configuration issue
  - From: Naga Chaitanya Palle <Naga.Chaitanya@aricent.com>
- Re: N-way multi master configuration issue
  - From: Buchan Milne <bgmilne@staff.telkomsa.net>
- RE: N-way multi master configuration issue
  - From: Naga Chaitanya Palle <Naga.Chaitanya@aricent.com>

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