[CentOS] Why slapd dying?

redone1224 redone1224 at adelphia.net
Fri Jan 19 03:03:41 UTC 2007


----- 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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