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Design question about VG / LV in a clustered environement
by Nicolas Ross 07 Dec '11

07 Dec '11

Hi ! Since the last couple of months, we had a few problems with the maner we designed our clustered filesystem and we are planing to do a re-design of the filesystems and how they are used. Our cluster is composed of 8 nodes, connected via fibre channel, to a raid enclosure where we have 6 pair of 1-tb drives in mirror, so 6 1tb physical volumes. First of all, our services that are run from the cluster are running inside of directories. For exemple, a webserver for a given application is run from /CyberCat/WebServer/(...) That directory contains all executable (apache, php for exemple) and the related data, except for the databases. /CyberCat being a single GFS partition containing several other services. This filesystem and another one like this containing services for some other clients occupy a single VG composed of 2 PV (total 2tb). The remaining (4) other PV are used in one 1tb VG each, and those VG contains only one LV that is used for databases servers. For availibility reasons, we are planing of spliting the /CyberCat (and the other one like it) FS into several smaller filesystems, one for each service. The reason being that in the event that we need to make a filesystem check, or any other unplaned reason, on any filesystem it won't affect other services. So, now comes the question I have : 1. First of all, is this a bad idea ? 2. Is there any disadvantages of doing a single volume group composed of many physical volumes, enabling us to move the extents of a logical volume from one physical volume to another one, so that load is more balanced in the event we need it. Thanks for the input.

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[OT] posting bounties for rpms compatible with centos?
by Jason Pyeron 07 Dec '11

07 Dec '11

Is there an etiquitte to posting bounties to the centos community for OSS to be packaged in rpm form for centos? -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.

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Seeing rlimits on CentOS 4
by Stephen Harris 06 Dec '11

06 Dec '11

This is probably something any SA should know... but I don't! On CentOS 5 I can see what a process's current soft and hard limits are; /proc/<pid>/limits However this isn't in the C4 kernel. Is there any easy way of determining what the process rlimit values are? % uname -a ; cat /etc/redhat-release Linux c4 2.6.20.7 #3 Sun May 2 16:30:15 EDT 2010 i686 i686 i386 GNU/Linux CentOS release 4.8 (Final) (yes, I know this machine should be updated, but...) -- rgds Stephen

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/dev/sda
by m.roth＠5-cent.us 06 Dec '11

06 Dec '11

We're just using Linux software RAID for the first time - RAID1, and the other day, a drive failed. We have a clone machine to play with, so it's not that critical, but.... I partitioned a replacement drive. On the clone, I marked the RAID partitions on /dev/sda failed, and remove, and pulled the drive. After several iterations, I waited a minute or two, until all messages had stopped, and there was only /dev/sdb*, and then put the new one in... and it appears as /dev/sdc. I don't want to reboot the box, and after googling a bit, it looks as though I *might* be able to use udevadm to change that... but the manpage leaves something to be desired... like a man page. The one that appears interesting to me is udevadm --test --action=<string>... and the actual command that would run, but there is *ZERO* information as to what actions are available, other than the default of "add". Clues for the poor, folks? mark

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(no subject)
by Gagan Chohan 06 Dec '11

06 Dec '11

i have tried a lot but not able to get wireless .......................i am using dell 1470 14-r

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Upstream 6.2
by Lamar Owen 06 Dec '11

06 Dec '11

As much as I hate to be the bearer of news, I saw over 400 updates this morning on my upstream 6.1 box.... checking the upstream website, yeah, EL6.2 is out, at least for updates. I didn't see ISO's in my subscribed channel yet, though. I figured someone would notice soon enough. So before anyone goes into flame mode, think about the difficulties that have faced the CentOS developers in the past, and please refrain from asking the age-old question 'are we there yet?' (I have five children, between the ages of 17 and 4; that saying is just a smack old by now for me.....)

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Sources for extras??
by Beartooth 06 Dec '11

06 Dec '11

With invaluable help here, I've just gotten 6.0 onto a PC. I went through the listings in PackageKit, removing things I know I'll never use; ran yum update; installed Opera; went to the epel, rpmfusion, and one whose name slips my mind (It's a new name.); enabled them all; and tried to get a lot of my regular apps : [....] Setting up Install Process No package dillo available. No package epiphany available. No package galeon available. No package midori available. No package privoxy available. No package seamonkey available. Error: Nothing to do [root@localhost ~]# Does this mean I have to go chugging all over the web, digging out one (hopefully not quite obsolete) rpm after another? Is there no easier way?? -- Beartooth Staffwright, Not Quite Clueless Power User I have precious (very precious!) little idea where up is.

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How to preserve iptables when running the GUI tool ?
by Timothy Madden 06 Dec '11

06 Dec '11

Hello I have set up NAT with iptables for an openvpn connection, so that the VPN server could give VPN clients access to the entire sub-net of the server. The probelm is if I start system-config-securitylevel to say disable the firewall, and then again to enable it, my iptable rules are gone ! I did run `service iptables save` before. Is there something I can do to prevent this ? Is there a gui interface to enable NAT over a VPN connection that cooperates with system-config-network ? Thank you, Timothy Madden

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CentOS-announce Digest, Vol 82, Issue 3
by centos-announce-request＠centos.org 06 Dec '11

06 Dec '11

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CEBA-2011:1786 CentOS 5 x86_64 acpid FASTTRACK Update (Johnny Hughes) 2. CEBA-2011:1786 CentOS 5 i386 acpid FASTTRACK Update (Johnny Hughes) 3. CEBA-2011:1784 CentOS 5 i386 smartmontools FASTTRACK Update (Johnny Hughes) 4. CEBA-2011:1784 CentOS 5 x86_64 smartmontools FASTTRACK Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 6 Dec 2011 14:20:19 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2011:1786 CentOS 5 x86_64 acpid FASTTRACK Update To: centos-announce(a)centos.org Message-ID: <20111206142019.GA11837(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2011:1786 Upstream details at : http://rhn.redhat.com/errata/RHBA-2011-1786.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: c90bfbb0f5b499cbfd34d67088025759 acpid-1.0.4-12.el5.x86_64.rpm Source: 608a472b5859af2877f9f22e72c571ae acpid-1.0.4-12.el5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Tue, 6 Dec 2011 14:20:19 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2011:1786 CentOS 5 i386 acpid FASTTRACK Update To: centos-announce(a)centos.org Message-ID: <20111206142019.GA11821(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2011:1786 Upstream details at : http://rhn.redhat.com/errata/RHBA-2011-1786.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: a6655ce732cb311b47e691fded408f57 acpid-1.0.4-12.el5.i386.rpm Source: 608a472b5859af2877f9f22e72c571ae acpid-1.0.4-12.el5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Tue, 6 Dec 2011 14:22:20 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2011:1784 CentOS 5 i386 smartmontools FASTTRACK Update To: centos-announce(a)centos.org Message-ID: <20111206142220.GA11941(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2011:1784 Upstream details at : http://rhn.redhat.com/errata/RHBA-2011-1784.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: b3bb8b45f31cd2da986d3f37ea45d093 smartmontools-5.38-3.el5.i386.rpm Source: 2b771048f38ee1b18a9961f17fbc6af5 smartmontools-5.38-3.el5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 4 Date: Tue, 6 Dec 2011 14:22:20 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2011:1784 CentOS 5 x86_64 smartmontools FASTTRACK Update To: centos-announce(a)centos.org Message-ID: <20111206142220.GA11954(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2011:1784 Upstream details at : http://rhn.redhat.com/errata/RHBA-2011-1784.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: 77770207e02fc689092a767facf1fcb8 smartmontools-5.38-3.el5.x86_64.rpm Source: 2b771048f38ee1b18a9961f17fbc6af5 smartmontools-5.38-3.el5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 82, Issue 3 **********************************************

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Booting C 6.0 from C 5.7
by Always Learning 06 Dec '11

06 Dec '11

I installed C 6.0 in an empty partition. It functioned. Despite using the usually successful methods of booting into another operating system from C 5.7, I can't get into C 6.0 Tried:- title C6-0 (2.6.32-71.el6.x86_64) rootnoverify (hd0,6) chainloader +1 and root (hd0,6) kernel /boot/vmlinuz-2.6.32-71.el6.x86_64 ro root=UUID=67c62872-0c69-451c-8412-3c218c0d2cb0 rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=uk initrd /boot/initramfs-2.6.32-71.el6.x86_64.img My default works:- title CentOS 5.7 #6 (2.6.18-274.7.1.el5) root (hd0,0) kernel /boot/vmlinuz-2.6.18-274.7.1.el5 ro root=LABEL=d6sys ramdisk_size=600000 initrd /boot/initrd-2.6.18-274.7.1.el5.img and so does Ubuntu title Ubuntu 11.04 (chain) (2.6.38-8) rootnoverify (hd0,4) chainloader +1 but Centos 6.0 fails. Advice appreciated. -- With best regards, Paul. England, EU.

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