[CentOS] Why slapd dying?

[redone1224]

----- Original Message ----- 
From: "redone1224" <redone1224 at adelphia.net>
To: "CentOS mailing list" <centos at centos.org>
Sent: Thursday, January 18, 2007 10:03 PM
Subject: Re: [CentOS] Why slapd dying?


>
> ----- Original Message ----- 
> From: "Jun Salen" <nokijun at yahoo.com>
> To: <centos at centos.org>
> Sent: Thursday, January 18, 2007 9:47 PM
> Subject: Re: [CentOS] Why slapd dying?
>
>
>> Thanks Johnny. My Slapd are now running after start
>> thru service start command. One of the reason why the
>> daemon is dying before is that the dbd database was
>> corrupted probably by sudden power off due to lose
>> power socket connection. I follow your advise and now
>> enable logging thru it. Thanks again and more power to
>> you and to Matt.
>>
>> -------------------------
>>
>> On Wed, 2007-01-17 at 20:02 -0500, Matt Hyclak wrote:
>>> On Thu, Jan 18, 2007 at 12:46:34AM +0000, Jun Salen
>> enlightened us:
>>> > I am wondering why slapd in my CentOS 4.4s erver
>> was
>>> > unable to run.  I already configure ldap to start
>> at
>>> > boot and when I issue command /sbin/service ldap
>> start
>>> > it is sucessfully started but again when I check
>> the
>>> > status etheir thru service or by netstat, it was
>>> > stopped and not exist respectively. Is anybody
>>> > encountered this. If you need some more info
>>> > just let me know. Thanks.
>>> >
>>>
>>> I ran into this after restoring the ldap database
>> files from a backup
>>> (/var/lib/ldap). You can create /etc/sysconfig/ldap
>> and in it put
>> something
>>> like:
>>>
>>> SLAPD_OPTIONS="-d XXX"
>>>
>>> and restart ldap. Man the slapd manpage for all the
>> options. If it is
>> a
>>> corrupted database, you might look at the various
>> db_* commands, such
>> as
>>> db_recover. Googling for any error messages you get
>> will help, too.
>>
>> You can also turn on logging for slapd to figure out
>> want is going
>> on ...
>>
>> 1.  add this line to /etc/syslog.conf
>>
>> local4.*                         /var/log/ldap.log
>>
>> 2. add this line to /etc/openldap/slapd.conf
>>
>> loglevel 256
>>
>> (there are numerous levels ... see the below link and
>> search the page
>> for loglevel)
>>
>> http://www.openldap.org/doc/admin22/slapdconfig.html
>>
>> set the loglevel back to a valid value (I use 0) when
>> finished debuging
>> based on the above link.
>>
>> 3. add this to /etc/logrotate.d/syslog
>>
>> (somewhere in the log names line for syslog  {that is
>> the first line},
>> put this)
>>
>> /var/log/ldap.log
>>
>> (that will make ldap.log one of the logs it rotates)
>>
>> ----------------------
>> Some notes:
>>
>> 1.  The openldap people recommend a bdb type (and not
>> ldbm type)
>> database for the backend.
>>
>> Backing up the database with slapcat > filename   ...
>> and after
>> making
>> sure that "filename" is OK, removing all the files in
>> /var/lib/ldap/
>> and
>> using slapadd -l filename to restore can fix database
>> issues.
>>
>> you can also use slapcat > filename ... edit
>> slapd.conf to change from
>> ldbm to bdb database type ... create a DB_CONFIG file
>> in /var/lib/ldap/
>> and then do slapadd -l filename
>>
>> you need to chown all files to ldap.ldap in
>> /var/log/ldap/ prior to
>> restarting ldap.
>>
>> 2.  look at the man pages for slapd_db_recover and
>> slapindex and use
>> those if you database is not good.
>>
>> 3.  setup a test machine and play with slapcat and
>> slapadd to get the
>> hang of it first with the slapcat output file.
>>
>> 4. Here is my DB_CONFIG and changes specifically to
>> slapd.conf for bdb
>> (if you are not using it now):
>>
>> ----------------
>> ###DB_CONFIG###
>>
>> #
>> # Set the database in memory cache size.
>> #
>> set_cachesize 0 52428800 0
>>
>> # Automatically remove log files that are no longer
>> needed.
>> set_flags DB_LOG_AUTOREMOVE
>>
>> #
>> # Set database flags.
>> # (for database loading/reindexing)
>> #set_flags       DB_TXN_NOSYNC
>> #set_flags DB_TXN_NOT_DURABLE
>>
>> # Set log values.
>> #
>> set_lg_regionmax        1048576
>> set_lg_max              10485760
>> set_lg_bsize            2097152
>>
>> ------------------------
>> #slapd.conf adds#
>>
>> #database ldbm
>> database bdb
>> cachesize 100000
>> checkpoint 512 720
>>
>>
>>
>>
>>
>>
>> junji
>> linux registered user #253162
>>
>> Send instant messages to your online friends 
>> http://uk.messenger.yahoo.com
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>
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