Re: [CentOS] Apache warns Web server admins of DoS attack tool
On 31/08/2011, at 11:07 PM, Karanbir Singh wrote: On 08/31/2011 10:56 AM, Timo Schoeler wrote: Just released: https://www.apache.org/dist/httpd/Announcement2.2.html thanks. I guess we should wait on a fix from upstream, make sure its tested etc. If there is interest in doing a local fix/build for c4/5/6 testing repo's, please submit a patch and I can push it through the buildsys. For the main distro, lets wait on the upstream fix. For EL 4, 5, 6: https://rhn.redhat.com/errata/RHSA-2011-1245.html Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS failover cluster
On 17/01/2009, at 9:46 AM, John R Pierce wrote: Giuseppe Fuggiano wrote: What should I use to configure a failover cluster under CentOS? Is there Red Hat Cluster Suite or something like that? Thank you in advance. in general, 'heartbeat'. RHCS (Red Hat Cluster Service) is some wrappers around heartbeat, and rather a finicky control panel for it all. It's RedHat Cluster Suite, not Service, and it's not wrappers around heartbeat. In answer to Guiseppe's question, the RedHat Cluster Suite is available as part of CentOS and works great. Whether RHCS will help you or not, I cannot say due the fairly vague description of your requirements. http://www.centos.org/docs/5/html/5.2/Cluster_Suite_Overview/ http://www.centos.org/docs/5/html/5.2/Cluster_Administration/ Regards, Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: slow Perl on CentOS 5
On 27/08/2008, at 6:57 AM, Stephen John Smoogen wrote: On Tue, Aug 26, 2008 at 3:11 PM, Scott Silva [EMAIL PROTECTED] wrote: on 8-26-2008 2:08 PM Karanbir Singh spake the following: Akemi Yagi wrote: On Mon, Aug 25, 2008 at 1:30 PM, Florin Andrei [EMAIL PROTECTED] wrote: If your Perl apps are unusually slow on CentOS 5, have a look at this blog: http://blog.vipul.net/2008/08/24/redhat-perl-what-a-tragedy/ Summary: The Upstream Vendor version of Perl has a patch to the bless[] function that makes it /extremely/ slow. Reliable info heard on the grapevine indicates 5.3 would have the fix's required. So that means about 6 months away from a fix? Unless upstream bundles a hotfix that is available for people... Such a hotfix was released in the last couple of days. A big moment for RHEL/CentOS + Perl users. :) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Yum corrupting RPMs
Hi list, Trying to upgrade someone's workstation here to 5.2 (was installed from a 5.0 DVD I think). The RPMs on our internal mirror are in-tact and pass a 'rpm -- checksig' test, yet when I run a 'yum upgrade' a large portion of them are corrupted and fail the GPG check. This seems to be isolated to yum, as downloading the RPM directly via FTP with wget or lftpget provides an RPM that *does* pass the GPG check. I have upgraded key packages to the latest version (eg. yum upgrade 'yum*') and tried again to no avail. Anyone seen this before? Thanks, Tom -- Tom Lanyon Systems Administrator NetSpot Pty Ltd ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Yum corrupting RPMs
On 25/08/2008, at 11:37 AM, Ray Van Dolson wrote: How are you sync'ing the RPM's on your internal mirror? Do you run createrepo locally to generate the metadata yourself or just rely on the mirror's information? We just sync 1:1 and rely on the mirror's metadata. As far as I know, there should be no issue with this... or am I missing something? Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Yum corrupting RPMs
On 25/08/2008, at 10:54 AM, Tom Lanyon wrote: Hi list, Trying to upgrade someone's workstation here to 5.2 (was installed from a 5.0 DVD I think). The RPMs on our internal mirror are in-tact and pass a 'rpm -- checksig' test, yet when I run a 'yum upgrade' a large portion of them are corrupted and fail the GPG check. This seems to be isolated to yum, as downloading the RPM directly via FTP with wget or lftpget provides an RPM that *does* pass the GPG check. I have upgraded key packages to the latest version (eg. yum upgrade 'yum*') and tried again to no avail. Anyone seen this before? Thanks, Tom There's no proxy server in between these machines; nothing seems to corrupt the download when downloading manually via FTP. Also, yum seems to use the python URLGrabber module to download its RPMs. I just wrote a quick python test script to download some problematic RPMs using the URLGrabber module and they also passed the RPM GPG check! Yum is doing something crazy internally with the RPMs its downloading into memory, I think. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Yum corrupting RPMs
On 25/08/2008, at 12:17 PM, Ray Van Dolson wrote: What's the exact error you get from yum? One thing you can do is to check the output of sha1sum against the RPM in the Yum cache on the client machine and compare that against the checksum value stored in the primary.xml.gz file for one of the bad packages. Ray Ray, Thanks, I was just checking the SHA sums using sha1sum and yum's misc.checksum() and I couldn't get either to match what's in the primary.xml.gz metadata. Further investigation seems to indicate the upstream mirror we're syncing from is corrupt. Whoops, who looks silly now. :) Thanks all, Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Spacewalk from Redhat
On 01/07/2008, at 5:23 PM, Amos Shapira wrote: Blahh 9, 10, whatever - it's not free. I'd sort of expect it to work with PostgresQL/MySQL. Weird choice, as the guy who works for me put it. Thanks for the clarification. --Amos It has (only just) spawned from a non-open, non-free system (RHN satellite) so it was easy to only use one database, so why wouldn't they use Oracle? They plan to make it work with Pg, MySQL, etc. Oracle XE is free and will work with Spacewalk but there's a few bugs which exist in this environment. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Spacewalk from Redhat
On 01/07/2008, at 2:19 PM, Amos Shapira wrote: 2008/6/30 Bazy [EMAIL PROTECTED]: Hello, Is anyone using Spacewalk (http://www.redhat.com/spacewalk/) on CentOS 5 or 4? What kind of hardware are you useing it on? Do I read it right that it requires Oracle 9?? (http://tinyurl.com/6rff8l) or am I missing something? 9 or 10, I believe. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] dm-multipath use
On 26/06/2008, at 3:57 AM, Finnur Örn Guðmundsson wrote: Hi, I'm running ~45 machines that boot from SAN/or are connected to our SAN fabrics on CentOS 4.x/5.x (And about 20 more running RHEL5) without problems at all. The storage is IBM SVC (2145). Just make sure multipathd is running on your system, otherwise it will not recover paths correctly. Thanks, Finnur Same here on a similar number of systems connected to two SANs. active- active over FC, four-paths running multibus, all works fine.___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] problem with telnet
On 24/06/2008, at 3:28 PM, fabian dacunha wrote: Dear All i have a centos 5 server running as a backup PC server and is working perfect for abt 3 months jus a couple of days back when i tried to telnet to the server it gave me connection refused What on earth are you using telnet for? Unless you have a very good reason, use SSH. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is it possible to login to a switch via RS232 / serial port from the shell? - SOLVED
On 23/06/2008, at 7:56 PM, Rudi Ahlers wrote: Anyway, it's working now. I had to change the Xen config in /boot/ grub/menu and tell Xen not to use ttyS0 as a serial console for itself. http://wiki.xensource.com/xenwiki/InstallationNotes#head-b915c65538e3d0cb29da04e05cb278e44624a522 Good to hear it's working. FYI, for future reference since not many people seem to know this, simple GNU 'screen' is also a terminal emulator and is *much* more simple than minicom, kermit, etc. $ yum install screen $ screen /dev/ttyS0 'man screen' for more info. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 5.2 and Xen
On 18/06/2008, at 11:00 PM, Ruslan Sivak wrote: From what I understand, they limit you to 4GB for DomU, you still have another 4GB available for Dom0, that you can use to run other apps, including possibly QEMU, or some other virtualization products. Russ I haven't been following the thread, but has the discussion been about memory limits of Xen? Am I going to face any issues wanting to run some CentOS 5.x x86_64 boxes with 16 or 32 GB memory as Xen hosts with up to 10 or 12 GB memory CentOS 5.x x86_64 domUs ? Furthermore, am I going to encounter issues running CentOS 5.x i386 boxes with 8 GB memory trying to run CentOS 4.x i386 domUs with 3.5 or 4GB memory? Regards, Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 5.2 and Xen
On 24/06/2008, at 9:08 AM, Luke S Crawford wrote: We were discussing memory limits of the free (as in beer) closed source citrix xensource product- limits are added to the free product in order to encourage people to upgrade to the more expensive products. These limits don't exist in the open-source xen product, which is what the centos/Xen stuff is based on. http://tx.downloads.xensource.com/downloads/docs/user/#SECTION0113 I've personally run CentOS x86_64 5.1 boxes with north of 16G ram- there is nothing I am aware of that would stop you from putting as much ram as you want in a particular DomU. You will be needing PAE, but that is default for CentOS i386/xen, so it should Just Work. make sure you install the libc6-xen package (should be installed as a dependency.) The usual PAE limits apply. I'm typing this message in emacs running on a DomU hosted on an i386/ PAE box with 6G ram running CentOS5.1/xen. Hi Luke, Thanks for the confirmation; this is what I had understood but some of the prior discussion scared me. :) Regards, Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Kickstart syntax for CentOS upgrade
On 29/04/2008, at 6:27 AM, Alfred von Campe wrote: But when I try to install CentOS 5.1 via kickstart, anaconda complains that You have not defined a root partition (/), which is required for installation of CentOS to continue. Has anyone successfully installed CentOS 5.X via kickstart and preserved at least one partition on a logical volume, and if so, could you please share your kickstart file? Alfred, This worked fine for me on a 4.6 kickstart I did recently. I can't remember whether I tried it on 5.x or not, sorry. bootloader --location=mbr --driveorder=sda part /boot --onpart=sda1 --fstype=ext3 part swap --onpart=sda2 --fstype=swap volgroup vg --useexisting logvol / --useexisting --name=root --vgname=vg --fstype=ext3 Because the volgroup already exists you don't need to define a PV for it. Hope this helps, although it doesn't look much different to your config! Regards, Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Xen, GFS, GNBD and DRBD?
Hi all, We're looking at deploying a small Xen cluster to run some of our smaller applications. I'm curious to get the lists opinions and advice on what's needed. The plan at the moment is to have two or three servers running as the Xen dom0 hosts and two servers running as storage servers. As we're trying to do this on a small scale, there is no means to hook the system into our SAN, so the storage servers do not have a shared storage subsystem. Is it possible to run DRBD on the two storage servers and then export the block devices over the network to the xen hosts? Ideally the goal is to have the effect of shared storage on the xen hosts so that domains can be migrated between them in case one server needs to go offline. Do I run GFS on top of the DRBD mirrored device, exported via GNBD to the xen hosts; or the other way around, using GNBD to export the DRBD mirrored device and then GFS running on the xen hosts? Is this possible; is there an easier/simpler/better way to do it? Thanks, Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Xen, GFS, GNBD and DRBD?
On 03/01/2008, at 9:55 AM, Ross S. W. Walker wrote: Take a look at iSCSI for the storage servers. iSCSI Enterprise Target is what I use here and it works well for us. You don't really need shared filesystems if you are doing direct block io to LVs or raw partitions as the Xen migration will handle the hand-off, but you will if you are using flat files, because of this I recommend using LVs or raw partitions as clustered filesystems will put a serious overhead on the Xen guest io. -Ross Ross, I can use DRBD to mirror data between the two storage servers and iSCSI to export the block devices, but how will iSCSI cope with failure of one storage server? Can I use heartbeat and CRM to failover the host IP and iSCSI target to the other storage server? Regards, Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Yum FTP concurrency
Greetings, My chosen CentOS mirror has a limit of 5 max FTP connections per IP. A simple 'yum update' is hitting this limit and causing the whole update procedure to fail. Are there any settings to limit yum's FTP concurrency? Regards, Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 5.x install - loses display when launching anaconda
On 06/12/2007, at 8:20 AM, James A. Peltier wrote: Tom Lanyon wrote: Hi all, Trying to install 5.0 or 5.1 (i386 or x86_64) on a new system from an install DVD. As soon as the installer launches anaconda, the screen shuts off and from this point I'm unable to switch to any other tty. This is an Intel core2duo machine on an Intel P35 chipset motherboard, Geforce 8400GS video card connected to a BenQ 20 widescreen LCD. Any ideas what could cause this behaviour or how to debug further (obviously I can't see any error messages as my virtual consoles are no loner available)? I think I'll try installing via a serial console when I get home and see if I have more success. Regards, Tom Try installing via a text console type linux text at the boot prompt. I forgot to mention I tried installing via both graphical and text. Also tried a network-based text install. All presented no video output whatsoever at the anaconda launch point. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 5.x install - loses display when launching anaconda
could it be bad media? just a thought I don't believe so -- I've tried booting from 5.0 CD1, 5.1-netinstall, 5.0 custom boot iso, 5.0 DVD and 5.0 PXE boot and using DVD, FTP and HTTP as installation source with no luck. I left my serial cable at work (doh) so I can't try that until tomorrow, unless anyone else has any ideas? Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
