Discuss August 2012

discuss@lists.centos.org

190 participants
167 discussions

Create Virtual Machine via HTTP or FTP
by cbulist＠gmail.com 08 Jun '14

08 Jun '14

Hi, I'm trying to create a Virtual Machine using Network Install mode (I tried HTTP and FTP). The HTTP/FTP server where the installation files are located is the Host Machine. The URL that I'm using is: http://192.168.1.104/inst and the Automatic detect option detects the OS without problem. When the installation starts I got an error: Unable to retrieve http://192.168.1.104/inst/images/install.img I tried different path but I always get the same error. The host machine is a Centos 6.2 (2.6.32.-220.el6.x86_64) I really appreciate any help with this problem. Thanks in advance,

5 7

Building CentOS 6.2 custom install media
by Daniel Drake 14 Sep '13

14 Sep '13

Hi, For the OLPC school server ("XS") we are planning to move from our dated F9 setup to CentOS 6.2. Thanks for all the effort involved in producing this distro. One important part of this project is a 'respin' of the install media - we need to add a handful of packages from external repositories, and maybe run a command late in the install. Are the scripts/configurations used to produce the CentOS official CD/DVDs available? I guess this would be our most reliable/sensible starting point. I am familiar with pungi, kickstart, anaconda, etc, so just a simple git link would be enough to get me started. Thanks, Daniel

5 7

Re: [CentOS] sieveshell fails to start on CentOS 6.0
by Devin Reade 12 Jun '13

12 Jun '13

--On Wednesday, August 10, 2011 01:52:21 PM -0400 Harold Pritchett <harold(a)uga.edu> wrote: > [harold@newmick ~]$ sieveshell localhost > connecting to localhost > unable to connect to server at /usr/bin/sieveshell line 170. Try specifying both --user and --authname as appropriate. sieveshell can be misleading in its error messages, and you may actually have an authentication error rather than a connection error there. You could run it under strace to make sure. Devin

3 2

Virtual Machine Manager error
by Rajagopal Swaminathan 11 Apr '13

11 Apr '13

Greetings, I am getting the following error when I start the Virtual machine manager [root@centos Desktop]# uname -a Linux blah.blah.blah 2.6.32-220.2.1.el6.x86_64 #1 SMP Fri Dec 23 02:21:33 CST 2011 x86_64 x86_64 x86_64 GNU/Linux Error polling connection 'qemu:///system': internal error Cannot find suitable emulator for x86_64 Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/engine.py", line 440, in _tick conn.tick() File "/usr/share/virt-manager/virtManager/connection.py", line 1414, in tick newNets, self.nets) = self._update_nets() File "/usr/share/virt-manager/virtManager/connection.py", line 1277, in _update_nets lookup_func, build_class) File "/usr/share/virt-manager/virtManager/connection.py", line 1209, in _poll_helper if not check_support(): File "/usr/share/virt-manager/virtManager/connection.py", line 501, in is_network_capable virtinst.support.SUPPORT_CONN_NETWORK) File "/usr/lib/python2.6/site-packages/virtinst/support.py", line 574, in check_conn_support return _check_support(conn, feature, conn) File "/usr/lib/python2.6/site-packages/virtinst/support.py", line 443, in _check_support actual_drv_ver = _hv_ver(conn, uri) File "/usr/lib/python2.6/site-packages/virtinst/support.py", line 376, in _hv_ver ret = cmd(*args) File "/usr/lib64/python2.6/site-packages/libvirt.py", line 2823, in getVersion if ret == -1: raise libvirtError ('virConnectGetVersion() failed', conn=self) libvirtError: internal error Cannot find suitable emulator for x86_64 any clues? TIA -- Regards, Rajagopal

12 17

CentOS 6 : Tip for significantly increasing battery life / reducing power consumption (Thinkpad X220 Tablet)
by Mathieu Baudier 24 Mar '13

24 Mar '13

Hello, I was not happy with the power consumption of CentOS 6 x86_64 on a new Lenovo Thinkpad x220 Tablet and I worked on reducing it. I just wanted to share with the list one of the changes which gave me the most significant improvement. As per http://www.williambrownstreet.net/blog/?p=387, add the following kernel arguments to the GRUB boot configuration: pcie_aspm=force i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 (in /boot/efi/EFI/redhat/grub.conf since I use EFI, /boot/grub/grub.conf otherwise) As measured using PowerTop, this made the power consumption decrease from 20W to 11W ! (I had already decreased it from 25W to 20W with the usual tips of disabling hardware, shutting down services, switching tuned profiles, etc.) All in all, battery time was more than multiplied by two, and the computer is now much more silent since the fan is not always running like mad in order to cool the processor. The bottom of the laptop is not anymore hot as hell. I don't know whether this would have an impact on other hardware, but it may be worth looking at it (even on servers?), since the above link points to descriptions of a regression in the kernel which seems more general. As a side note, the Power Management Guide of Red Hat is a good resource (analysis tools + tuned profiles): http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Po… Cheers, Mathieu PS: Do you think I should book a bug in the upstream bug tracker?

5 8

Building Dovecot CentOS 5 RPMs with custom LDAP packages
by Nikolaos Milas 11 Jan '13

11 Jan '13

Hi, We are (still) mainly using CentOS 5 (5.8 x86_64). As CentOS / EL 5 standard OpenLDAP packages are rather old (2.3.x), we've been using LTB OpenLDAP packages ( http://ltb-project.org/wiki/download#openldap), which get installed in non-standard file system locations. I am not much experienced in building RPMs and preparing spec files. We are currently using dovecot RPM packages from the atrpms repo (http://packages.atrpms.net/dist/el5/dovecot/). I would like to re-build Dovecot packages based on the LTB OpenLDAP RPM packages (OpenLDAP v2.4.x), esp. because I see that ATRPMs Dovecot RPM packages are built using OpenLDAP v2.3 devel code (i.e. standard CentOS OpenLDAP devel packages). In http://dl.atrpms.net/all/dovecot.spec I see: ------------------------------------------------ BuildRequires: openldap-devel, cyrus-sasl-devel ... Obsoletes: %{name}-pgsql < %{epoch}:%{version}-%{release}, %{name}-mysql < %{epoch}:%{version}-%{release}, %{name}-sqlite < %{epoch}:%{version}-%{release}, %{name}-ldap < %{epoch}:%{version}-%{release}, $ Conflicts: %{name}-pgsql > %{epoch}:%{version}-%{release}, %{name}-mysql > %{epoch}:%{version}-%{release}, %{name}-sqlite > %{epoch}:%{version}-%{release}, %{name}-ldap > %{epoch}:%{version}-%{release}, $ ------------------------------------------------ So, I guess I can/should change the former line to: BuildRequires: openldap-ltb-debuginfo, cyrus-sasl-devel Note: The final Dovecot RPM and the associated executables (included therein) do not need any LDAP dynamic library in order to run with LDAP support; i.e. after building, the produced package does not require any ldap package on the system. Question 1: What other changes/additions should we make in the spec file in order to specify that we will be using (if needed) LDAP libraries from: /usr/local/openldap/lib64 and include files from: /usr/local/openldap/include (rather than from /usr/lib64 and /usr/include, respectively, which are the standard file paths used in native openldap-devel RPM)? Question 2: How the Obsoletes and Conflicts lines should be changed? Any other associated info would be appreciated. Thanks, Nick

2 3

IE 9 not sending digest auth info
by Paul Heinlein 11 Jan '13

11 Jan '13

I migrated our internal wiki server last week, and some IE users aren't able to authenticate. The service is hosted by Apache using Digest authentication. It migrated from Apache 2.2.9 (Debian 5) to Apache 2.2.15 (CentOS 6). The internal hostname for the wiki server is a DNS CNAME that was repointed from one host to another during the cutover. In a normal session, 1. Client sends GET 2. Server sends 401 with WWW-Authenticate header 3. Client sends GET with Authorization header 4. Server sends 200 with Authentication-Info header and page content When using IE 9 (and possibly 8, I'm still trying to track that down), 1. Client sends GET 2. Server sends 401 with WWW-Authenticate header 3. Client resends GET (*without* Authorization header) 4. Server sends 401 with WWW-Authenticate header 5. Etc. IE seems to be ignoring 401 and/or the WWW-Authenticate headers. Using Chrome on Windows works fine; the issues are specific to IE. Any ideas? My google-fu has failed me. -- Paul Heinlein <> heinlein(a)madboa.com <> http://www.madboa.com/

3 4

Re: [CentOS] CONFIG_ARPD turned on in centosplus kernel.
by Akemi Yagi 12 Dec '12

12 Dec '12

On Thu, May 17, 2012 at 11:33 AM, Steve Clark <sclark(a)netwolves.com> wrote: > On 05/05/2012 04:45 PM, Akemi Yagi wrote: > > On Sat, May 5, 2012 at 12:40 PM, Steve Clark <sclark(a)netwolves.com> wrote: > > http://bugs.centos.org/view.php?id=5709 > > I actually took the latest centosplus kernel srpm and got it going in my > environment (would like to have > semi official support though ;-) ). It has been running stable for a > couple of weeks now. > > I have 4 systems setup using it and opennhrp in a DMVPN hub and spoke > arrangement. > I have 2 hubs with each of the spokes connected to each of the hubs. The > spokes would be units in the field while > the hubs would be at HQ in a failover environment using OSPF amongst them > all. > > I've updated the RFE you filed with some info. Will be nice if you > also add the above note in there. > > Akemi > _______________________________________________ > > Thanks Akemi, > > I am just preparing to test the new kernel. That's great. I closed the bug report thinking there would be no response. I will reopen it so that you can add your test result. Akemi

2 1

Re: [CentOS] 'localyum' alias...
by Fabien Archambault 19 Nov '12

19 Nov '12

2012/7/23 Fernando Cassia <fcassia(a)gmail.com>: > This alias should be a great default addition to the bashrc... as it > helps install packages to a CentOS system from the mounted install CD > before you get networking up and running... > > alias localyum='yum --disablerepo=* localinstall' > > Does Red Hat care about Requests for Enhancement? or is filing a bug pointless? > > FC Since the latest version of yum obsolete (in Fedora at least so I believe in CentOS it is/will be the same) the localinstall option, I believe that using this alias is useless. Fabien

3 3

CentOS 6.2 on partitionable mdadm RAID1 (md_d0) - kernel panic with either disk not present
by Arun Khan 15 Oct '12

15 Oct '12

Environment: CentOS 6.2 amd64 (min. server install) 2 virtual hard disks of 10GB each Linux KVM Following the instructions on CentOS Wiki <http://wiki.centos.org/HowTos/Install_On_Partitionable_RAID1> I installed a min. server in Linux KVM setup (script shown below) <script> #!/bin/bash nic_mac_addr0=00:07:43:53:2b:bb kvm \ -vga std \ -m 1024 \ -cpu core2duo \ -smp 2,cores=2 \ -drive file=/home/arunk/KVM/vdisks/centos62.raid1.disk1.img \ -drive file=/home/arunk/KVM/vdisks/centos62.raid1.disk2.img \ -net nic,vlan=1,model=e1000,macaddr=${nic_mac_addr0} \ -net tap,vlan=1,ifname=tap0,script=no,downscript=no \ </script> The system boots fine when both disks are available. When I remove either of the disks (delete the -drive file= line), the system boots to a point wherein the GRUB menu is displayed and the progress bar displays for a while till the white bar reaches about halfway point and then it: Kernel panic - not syncing: Attempted to kill init! The purpose of the above exercise was to test if the system will work in spite of losing one of the disks which is what RAID1 is supposed to do (I am emulating by removing the disk image line from the definition of the system). Has anyone tested CentOS 6.2 on partitionable mdadm RAID1 setup in bare metal hardware? Any suggestions/ideas as to what I may doing incorrectly? FWIW, outputs from "fdisk -l" and "df -hT" <fdisk -l> root@centos62-raid1 ~ > # fdisk -l Disk /dev/sda: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000e8353 Device Boot Start End Blocks Id System /dev/sda1 * 1 523 4194304 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 523 1045 4194304 83 Linux /dev/sda3 1045 1176 1048576 82 Linux swap / Solaris Disk /dev/sdb: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000e8353 Device Boot Start End Blocks Id System /dev/sdb1 * 1 523 4194304 83 Linux Partition 1 does not end on cylinder boundary. /dev/sdb2 523 1045 4194304 83 Linux /dev/sdb3 1045 1176 1048576 82 Linux swap / Solaris Disk /dev/md_d0: 10.7 GB, 10737352704 bytes 2 heads, 4 sectors/track, 2621424 cylinders Units = cylinders of 8 * 512 = 4096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000e8353 Device Boot Start End Blocks Id System /dev/md_d0p1 * 257 1048832 4194304 83 Linux Partition 1 does not end on cylinder boundary. /dev/md_d0p2 1048833 2097408 4194304 83 Linux Partition 2 does not end on cylinder boundary. /dev/md_d0p3 2097409 2359552 1048576 82 Linux swap / Solaris Partition 3 does not end on cylinder boundary </fdisk -l> <df -hT> # df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/md_d0p1 ext4 4.0G 1.9G 1.9G 50% / tmpfs tmpfs 499M 0 499M 0% /dev/shm /dev/md_d0p2 ext4 4.0G 136M 3.7G 4% /home </df -hT> -- Arun Khan

4 15

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Discuss August 2012