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34758 discussions

How to access the internet from load-balanced nodes?
by Igor Zhbanov 30 Jan '07

30 Jan '07

Hello! I have set-up four nodes system: two LVS load balancers (CentOS) and two working nodes (openSUSE). LVS nodes have global IPs, so they able to access the internet and working nodes have only private IPs, so they cannot access internet directly. I use NAT-base load balancing. Now I need to know how give working nodes ability to access the internet? I ask this because I don't know how to write properly iptables rules so LVS balancing packets will not conflict with working nodes internet connections. Should I assign some IP-alias for default gateway for that nodes or something else? Thanks.

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CentOS3 tzdata-2006m
by John R Pierce 30 Jan '07

30 Jan '07

I don't see the tzdata updates for 2006m in the centos 3 mirrors ?!? http://mirror.centos.org/centos-3/3/updates/i386/RPMS/ its here for centos4... http://mirror.centos.org/centos-4/4/updates/i386/RPMS/tzdata-2006m-3.el4.no… and here for 2.1, http://mirror.centos.org/centos-2/updates/noarch/tzdata-2006m-3.el2_1.noarc… so where is it for centos3 ?!? my RHN connected RHEL3 system has found tzdata-2006m-3.el3 via up2date should CentOS-3/3/updates have a noarch like 2.1 did ? I note in 4 they are mixed in with the specific architectures...

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unable to mount centos hard drive
by Lance Earl 30 Jan '07

30 Jan '07

I am considering changing my server from Ubuntu to Centos. I have been tinkering with a box that will eventually become a new server. I am having a problem. This box has two ide drives. Originally I had a Ubuntu desktop installed on hda and then added a Centos server installed on hdb. I wanted to try a different server configuration without overwriting the current install on hdb. With the server on hdb running, I mounted hda and copied some important files from the Ubuntu drive to the Centos drive. I installed a another instance of centos on hda and everything worked fine. With the hda install running, I have attempted to mount hdb so that I can retrieve my files. The problem I have is that when I mount the drive I am taken to the boot directory on hdb and cannot navigate to the directory that holds my files. How do I get access to the rest of the drive? Thanks Lance Earl

5 5

UCD-SNMP rpm
by Matthias Nilsson 30 Jan '07

30 Jan '07

Hi where can i find the UCD-SNMP rpm for nagios ???? in CentOS4.4 Matthias Nilsson U.D.COMM.

2 1

RE: [CentOS] Problems with building a complete kernel
by Mark Hull-Richter 30 Jan '07

30 Jan '07

Yes. Here is what happens: Booting (CentOS 2.6.9MHRsmp)' kernel direct mapping nodes[?] up to 10100000000 @ 8000-d000 root (hd0,0) Filesystem type is ext2fs, partition type 0x83 kernel /vmlinuz-2.6.9MHRsmp ro root=/dev/VolGroup00/LogVol00 rhgb quiet [Linux-bzImage, setup=0x1400, size=0x190795] initrd /initrd-2.6.9MHRsmp.img [Linux-initrd @ 0x3706300, 0x18caf6 bytes] . Decompressing Linux...done Booting the kernel audit (1170068438.664:0): initialized Red Hat nash version 4.2.1.8 starting Reading all physical volumes. This may take a while... No volume groups found Volume group "VolGroup00" not found ERROR: /bin/lvm exited abnormally! (pid 206) mount: error 6 mounting ext3 mount: error 2 mounting none switchresest: mount failed: 22 umount /initrd/dev failed: 2 Kernel panic - not syncing: Attempted to kill init Then the system halts. I'm using the same config file as the installed CentOS 2.6.9-42.0.3, and here are my /etc/fstab and grub.conf contents: [root@localhost linux]# cat /etc/fstab # This file is edited by fstab-sync - see 'man fstab-sync' for details /dev/VolGroup00/LogVol00 / ext3 defaults 1 1 LABEL=/boot /boot ext3 defaults 1 2 none /dev/pts devpts gid=5,mode=620 0 0 none /dev/shm tmpfs defaults 0 0 none /proc proc defaults 0 0 none /sys sysfs defaults 0 0 /dev/VolGroup00/LogVol01 swap swap defaults 0 0 /dev/hda /media/cdrecorder auto pamconsole,fscontext=system_u:object_r:removable_t,exec,noauto,managed 0 0 /dev/fd0 /media/floppy auto pamconsole,fscontext=system_u:object_r:removable_t,exec,noauto,managed 0 0 [root@localhost linux]# cat /etc/grub.conf # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00 # initrd /initrd-version.img #boot=/dev/sda default=2 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu password **************************************************** title CentOS (2.6.9MHRsmp) root (hd0,0) kernel /vmlinuz-2.6.9MHRsmp ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-2.6.9MHRsmp.img title CentOS (2.6.9MHRsmp2) root (hd0,0) kernel /vmlinuz-2.6.9MHRsmp2 ro root=/dev/sda1 rhgb quiet initrd /initrd-2.6.9MHRsmp2.img title CentOS (2.6.9-42.0.3.ELsmp) root (hd0,0) kernel /vmlinuz-2.6.9-42.0.3.ELsmp ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-2.6.9-42.0.3.ELsmp.img title CentOS (2.6.9-42.0.3.EL) root (hd0,0) kernel /vmlinuz-2.6.9-42.0.3.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-2.6.9-42.0.3.EL.img title CentOS-4 x86_64 (2.6.9-42.ELsmp) root (hd0,0) kernel /vmlinuz-2.6.9-42.ELsmp ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-2.6.9-42.ELsmp.img title CentOS-4 x86_64-up (2.6.9-42.EL) root (hd0,0) kernel /vmlinuz-2.6.9-42.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-2.6.9-42.EL.img Any hints, suggestions, comments, etc. would be most welcome. Thanks. mhr -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Marcin Mazurek Sent: Saturday, January 27, 2007 1:03 AM To: CentOS mailing list Subject: Re: [CentOS] Problems with building a complete kernel Mark Hull-Richter (mhull-richter(a)datallegro.com) napisał(a): > I haven't actually made any changes to the kernel yet - I need a working > build, hopefully one that matches my current installation, but a working > build to start. (Otherwise I won't know if the kernel I'm running and > one I've modified contain anything I don't know about....) > > I used the config that the installed version had as my base, and I don't > think I changed anything. I ran make menuconfig and set the version to > something different, then ran make oldconfig to see what changes were > needed (none), then built. In theory, if lvm support was in the > installed kernel, it should have built into my new one, right? > Do You have an initrd file for new kernel? If not You should create one with mkinird. hth -- Marcin Mazurek http://www.netsync.pl/ - :::: - nic-hdl: MM3380-RIPE GnuPG 6687 E661 98B0 AEE6 DA8B 7F48 AEE4 776F 5688 DC89 _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

3 2

tasks bouncing between CPUs
by Florin Andrei 29 Jan '07

29 Jan '07

I've a dual core system (see /proc/cpuinfo at the end) running CentOS 4.4 (fully up-to-date) and I'm running a PHP script that's parsing files and dumping the results into a database. Software versions: # rpm -q php php-4.3.9-3.22 # rpm -q MySQL-server-standard MySQL-server-standard-5.0.27-0.rhel4 # uname -srvmpio Linux 2.6.9-42.0.3.ELsmp #1 SMP Fri Oct 6 06:21:39 CDT 2006 i686 athlon i386 GNU/Linux The thing is, the script process and the MySQL process seem to arbitrarily jump from one CPU to another. That would be fine, I guess, but sometimes both processes are on the same CPU core. Is there a way to keep these processes separate (each one on a different core), or make them "sticky" w.r.t. the CPU cores? # cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 35 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4800+ stepping : 2 cpu MHz : 2412.035 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext lm 3dnowext 3dnow pni bogomips : 4825.57 processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 35 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4800+ stepping : 2 cpu MHz : 2412.035 cache size : 1024 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext lm 3dnowext 3dnow pni bogomips : 4821.52 -- Florin Andrei http://florin.myip.org/

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Beta of 5
by Martin Marques 29 Jan '07

29 Jan '07

Will there be any betas of centos 5? Or should we test the RHEL5 betas? -- 21:50:04 up 2 days, 9:07, 0 users, load average: 0.92, 0.37, 0.18 --------------------------------------------------------- Lic. Martín Marqués | SELECT 'mmarques' || Centro de Telemática | '@' || 'unl.edu.ar'; Universidad Nacional | DBA, Programador, del Litoral | Administrador ---------------------------------------------------------

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UFS (Unix File System) support
by Jordi Espasa Clofent 29 Jan '07

29 Jan '07

Hi, I need to mount a UFS (Unix File System) partition from an external device (ie, live cd). I've seen the kernel-2.6.x-x.x.x.xxx.plus.c4 has UFS support and I've several questions about: ¿How I know what FS are supported by my kernel? ¿Is CentOS LiveCD edition builded with UFS support? ¿Is there another way to get UFS support without the complete installation of a new kernel? Thanks.

4 5

Centos kickstart
by edwin.elifuraha 29 Jan '07

29 Jan '07

Hi Pierre, Thanks for your reply it really help as i did not have that file(discinfo) in my cd,i have included it and now i can boot but stop at disc partitioning setup asking me to choose some options which i have already done them in kickstart file. Can you advice the way forward Regards Edwin

1 0

Where can I get samba-vscan from?
by Rakhesh Sasidharan 29 Jan '07

29 Jan '07

Hi there! Am using CentOS 4.4. Have installed Samba and ClamAV. My understanding is that there's a vfs module (samba-vscan) which I have to install for Samba to virus scan its shares. Where can I get it from? I tried stuff like "yum install samba-vscan" etc but it doesn't seem to be there in the repos. I have RPMForge and the usual CentOS repos enabled. Is this something I have to install from the sources or can I get a binary package from someplace? Thanks, Rakhesh

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