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Re: [CentOS] Why slapd dying?
by Jun Salen 19 Jan '07

19 Jan '07

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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Apache 2.2 under CentOS?
by Peter Serwe 19 Jan '07

19 Jan '07

We've been going through some growing pains fumbling through porting some custom C modules that used to live under apache 1.3 into the 2.0 spec, even though none of us really considers ourselves a 'C developer'. We've basically got them all working now under the 2.0 API, and the question was posed about whether or not we should consider attempting to upgrade everything to run under httpd-2.2. I noticed the httpd2 port is only 2.0.53 under CentOS, and I was wondering why that is? Is there a 2.2 port? Is there plans to do one? Was it tried and found that there are significant obstacles in the way of getting 2.2 to run under CentOS 4.4? Is there a port of 2.2 planned for 5.0? Is it a question of resources, and should we undertake it, do you guys want the resulting i686 RPM's? Comment Karanbir? Peter -- Peter Serwe <peter at infostreet dot com> http://www.infostreet.com "The only true sports are bullfighting, mountain climbing and auto racing." -Earnest Hemingway "Because everything else requires only one ball." -Unknown "Do you wanna go fast or suck?" -Mike Kojima "There are two things no man will admit he cannot do well: drive and make love." -Sir Stirling Moss

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centos driver disk?
by Steve Huff 19 Jan '07

19 Jan '07

the recent discussion of support for Promise SATA drives reminded me that a while back i remember reading about a project to assemble a driver disk to provide wider hardware support than just stock CentOS. how's that coming along? i don't see anything in the wiki about it... as i have a vested interest in this project (since i'm still relying on old MegaRAID controllers), i'd be willing to help out with it. what's the current status, and what needs doing? thanks, -steve -- If this were played upon a stage now, I could condemn it as an improbable fiction. - Fabian, Twelfth Night, III,v

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RE: [CentOS] Cluster with two i386 pcs!
by Dan Dansereau 18 Jan '07

18 Jan '07

Israel Hello - just my school of hard nocks experience, and running several clusters - from the small 2 dual cpu boxes, to my largest of 64 dual cpu boxes. Try using the following - it uses CENTOS as the base. http://www.rocksclusters.org/wordpress/ It is free, works perfectly on anything that CENTOS can run on, fairly well documentated, and a good support system / network of users. Dan Dansereau -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of israel.garcia(a)cimex.com.cu Sent: Thursday, January 18, 2007 2:07 PM To: centos(a)centos.org Subject: [CentOS] Cluster with two i386 pcs! I want to make a cluster with two simple (INTEL SATA) pcs using CentOS, my question is? Is there something easiest than Linux RedHat Cluster Manager to make a cluster using CentOS with just two pcs? Regards, Israel _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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internet wireless network requirements
by Richard E Miles 18 Jan '07

18 Jan '07

I currently am using CentOS 4.4 desktop computer. What would I need to recieve an internet signal from a wireless router that is connected to an Apple computer that is located upstairs? I am in the basement less than 150 feet from the Apple computer. I do not have wireless card in the CentOS desktop computer and am looking for a card to install to accomplish this. -- Richard Miles Federal Way WA. USA registered linux user 46097

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Re: [CentOS] Apache 2.2 under CentOS?
by Bogdan Nicolescu 18 Jan '07

18 Jan '07

I bookmarked this article yesterday. Haven't tried out yet. Upgrading to httpd 2.2.4 on RHEL and CentOS 4http://www.jasonlitka.com/2007/01/17/upgrading-to-httpd-224-on-rhel-centos… ----- Original Message ---- From: Peter Serwe <peter(a)infostreet.com> To: CentOS mailing list <centos(a)centos.org> Sent: Wednesday, January 17, 2007 10:00:28 PM Subject: [CentOS] Apache 2.2 under CentOS? We've been going through some growing pains fumbling through porting some custom C modules that used to live under apache 1.3 into the 2.0 spec, even though none of us really considers ourselves a 'C developer'. We've basically got them all working now under the 2.0 API, and the question was posed about whether or not we should consider attempting to upgrade everything to run under httpd-2.2. I noticed the httpd2 port is only 2.0.53 under CentOS, and I was wondering why that is? Is there a 2.2 port? Is there plans to do one? Was it tried and found that there are significant obstacles in the way of getting 2.2 to run under CentOS 4.4? Is there a port of 2.2 planned for 5.0? Is it a question of resources, and should we undertake it, do you guys want the resulting i686 RPM's? Comment Karanbir? Peter -- Peter Serwe <peter at infostreet dot com> http://www.infostreet.com "The only true sports are bullfighting, mountain climbing and auto racing." -Earnest Hemingway "Because everything else requires only one ball." -Unknown "Do you wanna go fast or suck?" -Mike Kojima "There are two things no man will admit he cannot do well: drive and make love." -Sir Stirling Moss _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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machine with many filesystem errors
by Jerry Geis 18 Jan '07

18 Jan '07

I have a machine with many file system errors. I booted into rescue mode - I tried to run "e2fsck -p /dev/hda1" but it says something about inconsistency and cannot run with -p. So then I just run "e2fsck /dev/hda1" and I have to answer MANY fixes with a "y". How can you just tell it to fix it and dont ask? I'd hate to say how many 'y' I have answered. The filesystem is ext3, I was surprised this even happened. Jerry

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centos version numbers
by Melinda Odom 18 Jan '07

18 Jan '07

Hi, I am running centos 4.2 version on my server. The /etc/redhat-release file lists centos 4.4 (final). In my Plesk server administration it also shows centos 4.2. I need to upgrade plesk and am suppose to have centos 4.3 to do this upgrade. In the past I have run "yum update" and the OS was always updated to the next version but this no longer works on my server. When I try yum update or yum upgrade there is nothing to update. I have checked some of the files from the centos mirror site for version 4 and it seems I have the same versions on my server. http://mirror.centos.org/centos/4/os/i386/ So would I have the most recent centos version? Sincerely, Melinda Odom Design Hosting, Inc. www.designhosting.biz 479-471-0891 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.16.14/636 - Release Date: 1/18/2007 4:00 AM

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Machine all of a suddens freezes. Any suggestions?
by Theo Band 18 Jan '07

18 Jan '07

This is a A8N32-SLI Deluxe motherboard with a AMD Athlon(tm) 64 X2 Dual Core 4400+ Processor. It freezes and cannot be accessed from the network. Keyboard/mouse/display, everything just stuck. It had an uptime of 17 days after I re-connected all cables and boards after a similar crash. My feeling is, this must be a hardware related problem. I inspected the logs under /var/log, but nothing. What would be the best approach to debug this problem? What can be the most likely cause? Or should I just accept it (it's a single user desktop machine). The machine has FC4 installed. Is there a chance that it becomes more stable with Centos (as said, I actually don't suspect the OS). For new machines I started installing Centos (and I'm happy with it, especially the fact that my EDA software vendors support it well). I monitor the machine with Zabbix, but no weird things there. Just before the freeze the machine had a processor load of 1 running a user simulation. Any suggestions would be welcome. Thanks, Theo

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Re: Fwd: [CentOS] Machine all of a suddens freezes. Any suggestions?
by Theo Band 18 Jan '07

18 Jan '07

Temperature could indeed be the case. The last time it happened was during heavy load. The fans are spinning, that I checked already. I will add temperature monitoring as well to the logs. Dirt could be, but this machine is not even a year old. I'll check the CPU cooler assembly. Thanks, Theo Dave K wrote: > This bounced when sent to the list, so I'm copying you directly. > > ---------- Forwarded message ---------- > From: Dave K <davek08054(a)gmail.com> > Date: Jan 18, 2007 1:37 PM > Subject: Re: [CentOS] Machine all of a suddens freezes. Any suggestions? > To: CentOS mailing list <centos(a)centos.org> > > > On 1/18/07, Theo Band <theo.band(a)xanadu-wireless.com> wrote: >> ... It freezes and cannot be accessed from the network.... >> ... >> My feeling is, this must be a hardware related problem. I inspected the >> logs under /var/log, but nothing. >> ... >> What would be the best approach to debug this problem? What can be the >> most likely cause? > > The first thing I would suspect is some sort of cooling problem. > Verify that all of your fans are actually spinning. If the BIOS has > the option to always run the fans at full speed, try it for a while > (if you can stand the noise). Use a flashlight and check that the > airspace between the fins of any heatsinks aren't clogged with dust. > If there is room (and power) for additional fans, try adding one. > > The last system I had with "random" freezes runs fine now after a > replacement CPU fan, an additional case fan, and suitable application > of half a can of air-duster. > > -- > Dave K > Unix Systems & Network Administrator > Mount Laurel NJ > >

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