Discuss February 2015

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153 participants
158 discussions

SAMBA as AD DC
by Sergio Belkin 11 Sep '15

11 Sep '15

Hi folks, Is able SAMBA on CentOS 7 to work as Active Directory Domain Controller? If it's not, what is the recommended way of doing? Compiling from sources? Install packages from SerNet? Thanks in advance! -- -- Sergio Belkin http://www.sergiobelkin.com LPIC-2 Certified - http://www.lpi.org

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How to setup own i686 buildenv for CentOS7
by Robin Lee 07 Sep '15

07 Sep '15

Hi, all! How to setup own i686 mock for CentOS7? Or, is there any public i686 repo for CentOS7? I found i686 repo available in internal CentOS building environment, from a root.log from a mock build result[1]. [1] http://buildlogs.centos.org/c7-updates/glibc/20141218212615/2.17-55.el7_0.3… Cheers, -robin

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Mail Merge data to a pdf file by overlaying the data on the image
by Gregory P. Ennis 07 Jun '15

07 Jun '15

Everyone, I am looking for a utility that I can use to do a mail merge of data to a pdf image file. The image file does not have any active fields, but will be just an image file. I would like to overlay names addresses etc. We currently do this with a pcl file by just overlaying the data with pcl print positions. However, in order to get the pcl file from an original pdf file we have to use gimp to convert the pdf to pcl file, and we always lose a little resolution. I was wondering if anyone knows of a utility to perform this function without first converting the image to a pcl file. Thanks, -- Greg Ennis

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heavy IO load when working with sparse files (centos 6.4)
by Ron E 31 Mar '15

31 Mar '15

Dear List, We have noticed a variety of reproducible conditions working with sparse files on multiple servers under load with CentOS 6.4. The short story is that processes that read / write sparse files with large "holes" can generate an IO storm. Oddly, this only happens with holes and not with the sections of the files that contain data. We have seen extremely high IO load for example copying a 40 or 80gb sparse file that only has a few gigs of data in it. Attempts to lower the io priority and cpu priority of these processes do not make any measurable difference. (ionice, nice) This has been observed with processes such as: cp rsync sha1sum The server does have to be under some load to reproduce the necessary conditions. The cases we have seen involve servers running 10-30 guests under kvm. Load is in acceptable norms when the processes are run, such as load avg 5-15 on a 24 core (12 core with HT enabled) server. We also verify before starting such a process that the spindle with the file we're working on is not being unduly hammered by another process. These servers have one hardware raid controller each (Dell H700 controller with write cache enabled) and multiple raid arrays (separate sets of physical spindles). Interestingly, the IO storm is not limited to the array / spindles where the sparse file resides but affects all IO on that server. We have looked extensively and not found any account of a similar issue. We have seen this on configurations that are 'plain vanilla' enough to think that this is not something specific to our environment. Wondering if anyone else has seen this and if any suggestions on gathering more data / troubleshooting. We wonder if we've found either a raid controller driver issue, an OS issue or some other such thing. What seems to point in this direction is that even with ionice -c3 which should prevent the process from using IO unless the storage is idle, an io storm which appears to saturate the entire raid bus on a given server can occur. Thanks in advance.

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NTLM Authentication ISA Server
by Tim 31 Mar '15

31 Mar '15

Hello list, how can I get CentOS 7 to authenticate against a Microsoft ISA server for package installations after the OS is installed. In Debian/Ubuntu apt.conf just needs to be edited and it works. How to do so in CentOS? Regards Tim

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Centos 6.4 on Xserve, IPMI error
by Arno B 31 Mar '15

31 Mar '15

Hello! I'm trying to install Centos 6.4 64 bit on this Xserve: http://www.everymac.com/systems/apple/xserve/specs/xserve-intel-xeon-2.8-ei… I got a bootloader from: http://blog.christophersmart.com/2009/07/23/linux-on-an-apple-xserve-efi-on… as none of the official Centos releases (full, minimal, network 64 bit) boot on this machine. They all crash when loading the bootx64.conf. I have built a USB stick with a working bootx64.efi, grub.cfg, together with an initrd and a vmlinuz from the isolinux folder. These seem to get me into booting a kernel until something called IPMI is starting to throw errors at me: Console: switching to colour frame buffer device 128x48 fb0: VESA VGA frame buffer device ipmi message handler version 39.2 IPMI System Interface driver. ipmi_si 0000:09:00.4: enable device (0002 -> 0003) ipmi_si 0000:09:00.4: PCI INT C -> GSI 16 (level, low) -> IRQ 16 ipmi_si: Adding PCI-specified kcs state machine ipmi_si 0000:09:00.7: enable device (0000 -> 0003) ipmi_si 0000:09:00.7: PCI INT D -> GSI 17 (level, low) -> IRQ 17 ipmi_si: Adding PCI-specified bt state machine ipmi_si: Trying PCI-specified kcs state machine at mem address 0x90841000, slave address 0x0 irq 16 IRQ 16/ipmi_si: IRQF_DISABLED is not guaranteed on shared IRQs Using irq 16 ipmi: Found new BMC (man_id: 0x00003f, prod_id: 0x0003, dev_id: 0x20) IPMI kcs interface initialized ipmi_si: Trying PCI-specified kcs state machine at mem address 0x90840000, slave address 0x0 irq 17 Refined TSC clocksource calibration: 2792.999 MHz. Switching to clocksource tsc IPMI BT: timeout in XACTION [ B_BUSY ] 1 retries left IPMI BT: timeout in XACTION [ B_BUSY ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) then the screen goes to black and the machine doesn't respond to anything anymore... Can anyone please help me with this? Maybe just point me in a direction where to find a solution? I've been googling for a few days now without much results... thanks in advance Arno Beekman

2 1

leap second and Centos
by G Galitz 25 Mar '15

25 Mar '15

Hi. We have another leap second coming. Have past bugs with Centos and leap seconds (specifically high CPU spikes) been resolved? Should we be worried? -G

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Re: [CentOS] Chromium browser for C6
by Phelps, Matthew 16 Mar '15

16 Mar '15

Johnny, Any new information here? On Fri, Jan 23, 2015 at 11:10 AM, <m.roth(a)5-cent.us> wrote: > Phelps, Matthew wrote: > > On Fri, Jan 23, 2015 at 10:26 AM, <m.roth(a)5-cent.us> wrote: > > > >> Phelps, Matthew wrote: > >> > On Fri, Jan 23, 2015 at 2:51 AM, Sorin Srbu <Sorin.Srbu(a)orgfarm.uu.se > > > >> > wrote: > >> >> > -----Original Message----- > >> >> > From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] > >> On > >> >> > Behalf Of Karanbir Singh > >> >> > Sent: den 22 januari 2015 18:20 > >> >> > > >> >> > given the level of interest in getting this built - can we not get > >> >> > enough attention to the issues and just do a build without needing > >> to > >> >> > rely on what redhat is doing internally ? > >> >> > >> >> Yes, I second that!! > >> >> > >> > The motion being seconded, I now move the question. (Sorry, Roberts > >> > Rulesof Order are a fascination of mine.) > >> > > >> But there's been no discussion.... > >> > >> And CentOS just rebuilds RHEL. There are "extras", but I don't know if > >> those are CentOS-specific. > >> > >> mark, has played parliamentarian > > > > Sorry, no discussion. The question has been moved. :) (I kid...) > > Yes, you moved, but there was no second to calling the question..... > <snip> > mark "best use of Robert's Rules: to shut up someone who will > go on and on and on...." > > > -- Matt Phelps System Administrator, Computation Facility Harvard - Smithsonian Center for Astrophysics mphelps(a)cfa.harvard.edu, http://www.cfa.harvard.edu

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Glibc sources?
by ANDY KENNEDY 11 Mar '15

11 Mar '15

All, Please excuse any ignorance in this e-mail as I am not a RH/CentOS/Fedora user and may blunder my way through the correct terminology for my request. I'm tasked with reconstructing the CentOS version of the GlibC library for testing with gethostbyname(). My mission is to show that we are not affected by the latest exploit for the product we are shipping targeted for RHEL and CentOS. To do so, I want to equip gethostbyname() with additional code. My objective is to rebuild from source the EXACT version of GlibC for CentOS 6.6. Afterwards, I will make my changes in the code, rebuild and complete my testing. libc.so.6 reports: GNU C Library stable release version 2.12, by Roland McGrath et al. Copyright (C) 2010 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Compiled by GNU CC version 4.4.7 20120313 (Red Hat 4.4.7-11). Compiled on a Linux 2.6.32 system on 2015-01-27. Available extensions: The C stubs add-on version 2.1.2. crypt add-on version 2.1 by Michael Glad and others GNU Libidn by Simon Josefsson Native POSIX Threads Library by Ulrich Drepper et al BIND-8.2.3-T5B RT using linux kernel aio libc ABIs: UNIQUE IFUNC For bug reporting instructions, please see: <http://www.gnu.org/software/libc/bugs.html>. But, when looking through the source code for this version on the CentOS servers I only see: <http://vault.centos.org/6.6/updates/Source/SPackages/> [ ] glibc-2.12-1.149.el6_6.4.src.rpm 07-Jan-2015 22:45 15M [ ] glibc-2.12-1.149.el6_6.5.src.rpm 27-Jan-2015 23:13 15M Please point me to the correct source tarball, and all required patches so that I can reconstruct my loaded version of GlibC. A yum command is also acceptable. Thanks, Andy

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install latest gcc/g++ dev tools on centos
by Adekoya Adekunle 09 Mar '15

09 Mar '15

Guys, How can I install the latest version of gcc/g++ development tools on my centos ? I have version 4.1.* on the machine. Can I do above from yum ? I would be glad to read your responses to my questions Br Kunle

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Discuss February 2015