Discuss November 2009

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311 participants
290 discussions

mysqld not starting on reboot
by Victor Subervi 10 Nov '09

10 Nov '09

Hi; I installed mysql using yum, so I have an /etc/init.d/mysqld file. For some reason, however, mysqld doesn't boot on reboot of the machine. Please advise. TIA, Victor

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London Beer event today, last reminder
by Geerd-Dietger Hoffmann 10 Nov '09

10 Nov '09

Hey Some of us are yet-again going to be getting together for a CentOS Beer evening on the 10th Nov 2009 at the Kings and Queens. The Pub is mostly quiet during the week, has a fair selection of drinks and is central enough to most people in the city. The full address is : King & Queens, 1 Foley St, London, W1W 6DL Here is a Google Street view of the place http://bit.ly/1PchSO We should be there from about 6:30pm onwards. And depending on how people feel about it, will move around the corner to Ragham, for some food around 9pm. When you get there, keep an eye out for people in CentOS T-Shirts/ Shirts. There is no real agenda except focus on beer and the food! However, you are welcome to bring laptops around and show off any cool stuff you've been working on ( iirc, there is no internet at the pub though ). There will be some promo stuff to give away and I will bring a few T-Shirts people can get for a little donation towards the project. Cheers Didi ---- My www page: www.ribalba.de Email / Jabber: ribalba(a)gmail.com Skype : ribalba

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Xen pci passthru problems with kernel -164.6.1
by Miguel Di Ciurcio Filho 10 Nov '09

10 Nov '09

Hi there, After updating a server from CentOS 5.3 to 5.4 my Xen pci-passthru setup has some troubles. The server has two NICs, one used by dom0 and the other assigned to a domU and one SCSI controler assigned to another domU. It has been working fine since CentOS 5.1, when I did the initial setup. After upgrading to 5.4, I get this error when starting the domU with one of the NICs assigned: Error: pci: improper device assignment specified: pci: 0000:07:00.0 must be co-assigned to the same guest with 0000:07:00.1, but it is not owned by pciback. On the other hand, the domU with the SCSI controler boots, but the driver inside the domU prints a lot of awful errors and does not work. I've booted the domU with the SCSI controller using the -128.7.1 kernel and everything works fine as before -164.6.1. Any clues on why I can't assign just one NIC to the domU anymore? # ls -l /sys/bus/pci/drivers/pciback/ total 0 lrwxrwxrwx 1 root root 0 Nov 10 09:55 0000:07:00.1 -> ../../../../devices/pci0000:00/0000:00:02.0/0000:01:00.0/0000:02:02.0/0000:07:00.1 lrwxrwxrwx 1 root root 0 Nov 10 09:55 0000:08:03.0 -> ../../../../devices/pci0000:00/0000:00:02.0/0000:01:00.3/0000:08:03.0 --w------- 1 root root 4096 Nov 10 09:55 bind lrwxrwxrwx 1 root root 0 Nov 10 09:55 module -> ../../../../module/pciback --w------- 1 root root 4096 Nov 10 09:55 new_id --w------- 1 root root 4096 Nov 10 09:55 new_slot -rw------- 1 root root 0 Nov 10 08:35 permissive -rw------- 1 root root 0 Nov 10 08:35 quirks --w------- 1 root root 4096 Nov 10 09:55 remove_id --w------- 1 root root 4096 Nov 10 09:55 remove_slot -r-------- 1 root root 4096 Nov 10 09:55 slots --w------- 1 root root 4096 Nov 10 09:55 unbind # Script do create the initrds KVER="2.6.18-164.6.1.el5xen" mkinitrd -f --omit-scsi-modules --omit-raid-modules \ --with=e1000e --with=xennet --with=xenblk \ --preload=xenblk /boot/initrd-$KVER-domU.img $KVER mkinitrd -f --preload=pciback /boot/initrd-$KVER.img $KVER # cat /etc/modprobe.conf alias eth0 e1000e options netloop nloopbacks=0 options pciback hide=(0000:07:00.1)(0000:08:03.0) alias scsi_hostadapter2 megaraid_sas # this is the RAID controller alias scsi_hostadapter3 ata_piix # lspci |egrep "(Ether|SCSI)" 07:00.0 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit Ethernet Controller (Copper) (rev 01) 07:00.1 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit Ethernet Controller (Copper) (rev 01) 08:03.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI (rev 08) # uname -a Linux salvador.ic.unicamp.br 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 16:48:13 EST 2009 x86_64 x86_64 x86_64 GNU/Linux # domU-with-NIC.cfg kernel = "/boot/vmlinuz-2.6.18-164.6.1.el5xen" ramdisk = "/boot/initrd-2.6.18-164.6.1.el5xen-domU.img" memory = "4096" name = "taquaral" disk = ['phy:/dev/volumes/taquaral-root,xvda1,w', 'phy:/dev/volumes/taquaral-home,xvda2,w', 'phy:/dev/volumes/taquaral-home-staff,xvda3,w', 'phy:/dev/volumes/taquaral-home-adm,xvda4,w', 'phy:/dev/volumes/taquaral-home-admsis,xvda5,w', 'phy:/dev/volumes/taquaral-home-phd,xvda6,w', 'phy:/dev/volumes/taquaral-home-spec,xvda9,w', 'phy:/dev/volumes/taquaral-swap,xvda7,w', 'phy:/dev/volumes/taquaral-var,xvda8,w'] vif = ['mac=00:16:3e:57:13:a5, bridge=vlan0'] vcpus = 4 extra = "console=xvc0" root = "/dev/xvda1" pci = ["0000:07:00.1"] # domU-with-SCSI.cfg kernel = "/boot/vmlinuz-2.6.18-128.7.1.el5xen" ramdisk = "/boot/initrd-2.6.18-128.7.1.el5xen-domU.img" memory = "2048" name = "flamboyant" disk = ['phy:/dev/volumes/flamboyant-root,xvda1,w', 'phy:/dev/volumes/flamboyant-var,xvda2,w', 'phy:/dev/volumes/flamboyant-l,xvda3,w', 'phy:/dev/volumes/flamboyant-swap,xvda4,w'] vif = ['mac=00:16:e3:55:55:55, bridge=br0', 'mac=00:16:3e:55:55:10, bridge=vlan0'] vcpus = 2 extra = "console=xvc0" root = "/dev/xvda1" pci = ["0000:08:03.0"] # menu.lst title CentOS (2.6.18-164.6.1.el5xen) root (hd0,0) kernel /xen.gz-2.6.18-164.6.1.el5 dom0_mem=1G module /vmlinuz-2.6.18-164.6.1.el5xen ro root=LABEL=/ enforcing=0 module /initrd-2.6.18-164.6.1.el5xen.img

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Inquiry:How to check for IP conflict on my CentOS server?
by hadi motamedi 10 Nov '09

10 Nov '09

Dear All Please be informed that I have set an secondary IP address on my CentOS server to be able to reach to another Intranet , as the followings: #ifconfig eth0:1 172.18.209.1 netmask 255.255.0.0 up But I am not aware if any other node on the new Intranet is making use of this IP address . Can you please do me favor and let me know how can I check if any IP conflict occured ? Let me thank you in advance

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SELinux and KVM
by James B. Byrne 10 Nov '09

10 Nov '09

I am trying to set up a test kvm virtual machine on a core2 quad system. I have managed to thread my way through bridging eth0 and I have a CentOS-5.4 dvd iso prepared. Using virt-manager, when I try and add a new guest then I get the error reproduced below. Now, I know that I can 'fix' this by building a local mod via audit2allow and installing via semodule. However, I cannot seem to find this particular problem when I Google for it. Therefore, it seems likely that I have done something wrong rather than having encountered a bug. Does anyone have any suggestions as to what step I may have missed in setting up a kvm guest? All I have done so far is: Install qemu. Set libvirtd to start at boot. Bridge eth0 to br0 via customs ifcfg-X scripts in /etc/sysconfig/network-scripts. Run virt-manager. Add a new guest. Summary: SELinux is preventing qemu-system-x86 (qemu_t) "read" to rtc (clock_device_t). Detailed Description: SELinux denied access requested by qemu-system-x86. It is not expected that this access is required by qemu-system-x86 and this access may signal an intrusion attempt. It is also possible that the specific version or configuration of the application is causing it to require additional access. Allowing Access: Sometimes labeling problems can cause SELinux denials. You could try to restore the default system file context for rtc, restorecon -v 'rtc' If this does not work, there is currently no automatic way to allow this access. Instead, you can generate a local policy module to allow this access - see FAQ (http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385) Or you can disable SELinux protection altogether. Disabling SELinux protection is not recommended. Please file a bug report (http://bugzilla.redhat.com/bugzilla/enter_bug.cgi) against this package. Additional Information: Source Context system_u:system_r:qemu_t:SystemLow-SystemHigh Target Context system_u:object_r:clock_device_t Target Objects rtc [ chr_file ] Source qemu-system-x86 Source Path /usr/bin/qemu-system-x86_64 Port <Unknown> Host inet02.hamilton.harte-lyne.ca Source RPM Packages qemu-0.9.0-4 Target RPM Packages Policy RPM selinux-policy-2.4.6-255.el5_4.1 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Enforcing Plugin Name catchall_file Host Name inet02.hamilton.harte-lyne.ca Platform Linux inet02.hamilton.harte-lyne.ca 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 Alert Count 1 First Seen Mon 09 Nov 2009 06:28:32 PM EST Last Seen Mon 09 Nov 2009 06:28:32 PM EST Local ID d8ca7ab9-f135-4700-a515-c7b8efba1e27 Line Numbers Raw Audit Messages host=inet02.hamilton.harte-lyne.ca type=AVC msg=audit(1257809312.343:21): avc: denied { read } for pid=4166 comm="qemu-system-x86" name="rtc" dev=tmpfs ino=796 scontext=system_u:system_r:qemu_t:s0-s0:c0.c1023 tcontext=system_u:object_r:clock_device_t:s0 tclass=chr_file host=inet02.hamilton.harte-lyne.ca type=SYSCALL msg=audit(1257809312.343:21): arch=c000003e syscall=2 success=no exit=-13 a0=4d8b3c a1=0 a2=0 a3=8 items=0 ppid=1 pid=4166 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="qemu-system-x86" exe="/usr/bin/qemu-system-x86_64" subj=system_u:system_r:qemu_t:s0-s0:c0.c1023 key=(null) -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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Open Source (or Closed Source) multi-user password manager
by Sven Aluoor 10 Nov '09

10 Nov '09

Hello We use an Open Source Windows software[0] with about 1200 passwords. The encrypted file is stored on a CIFS-share. When concurrent write occurs, the users overwrite other users passwords. Now we are searching for a mutli-user password manager. Open Source would be good, but Closed Source is also accepted. support for Windows is a requirement and it shouldn't be a web application. So far I only found Clipperz[1] (sadly uses PHP/MySQL). Google results are bloated with SEO-spam. Can you recommend me an application? What do other Linux teams use? regards Sven [0] http://www.mirekw.com/winfreeware/pins.html [1] http://www.clipperz.com/open_source/clipperz_community_edition

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Question about aspell, alpine and a Xen guest
by Scot P. Floess 10 Nov '09

10 Nov '09

I have some weird behavior I can't explain... I've noticed this behavior since CentOS 5.2 (version I started running) through 5.4... I am running a Xen host/VM. On my guest VM, I use Alpine as my email client and Aspell as the spell-check... For whatever reason, when Aspell is kicked off - there appears to be what I'd call a prolonged pause before Aspell does its job. Should I run Alpine on bare metal (even on the host OS) - there is no pause whatsoever. The pause is so bad, I've stopped using Alpine in the VM and just running on the host OS itself. Its really not a big deal, but I can't figure out what or why there is a difference. Initially I thought it might be an issue with the amount of RAM I give the guest OS - I've tried from 256 MB to 768 MB - the pause is the same :( Any help or anything I can look at to figure this out - is greatly appreciated! Thanks ahead of time! Scot P. Floess 27 Lake Royale Louisburg, NC 27549 252-478-8087 (Home) 919-890-8117 (Work) Chief Architect JPlate http://sourceforge.net/projects/jplate Chief Architect JavaPIM http://sourceforge.net/projects/javapim Architect Keros http://sourceforge.net/projects/keros

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Inquiry:How to get remote login via frame relay link over E1?
by hadi motamedi 10 Nov '09

10 Nov '09

Dear All Please be informed that my CentOS server has an interface to the Internet on its eth0 port and an frame relay link over E1 to the remote site (to provide data service there) . Can you please do me favor and let me know how can I get remote login to the far end network element over this frame relay link over E1 ? Let me thank you in advance

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Migrating to CentOS Directory Server
by Camron W. Fox 10 Nov '09

10 Nov '09

Alle, We currently are using OpenLDAP for our authentication needs for CentOS, Redhat and Solaris clients. We are considering migrating to CentOS DS, however, two of our LDAP replicas are on Solaris 10 machines (different physical location, as well as network). Is there a port of CentOS DS for Solaris 10? There's no point in us getting all wrapped up in migration testing if we can't field a server on the Solaris boxes. Best Regards, Camron -- Camron W. Fox Hilo Office High Performance Computing Group Fujitsu Management Services of America, Inc. E-mail: cwfox(a)us.fujitsu.com

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redhat RHEV on centos?
by Eero Volotinen 10 Nov '09

10 Nov '09

Is it possible that rhev is available (soon) on centos? http://www.redhat.com/virtualization/rhev/ -- Eero, RHCE

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Discuss November 2009