virt December 2009

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23 participants
30 discussions

Fedora 12 2.6.31.5-127.fc12 domU on CentOS 5.4 2.6.18-164.6.1.el5xen fails to boot
by Charles J Gruener 06 Mar '10

06 Mar '10

Doing a kickstart install of Fedora 12 results in a non-bootable image. >From a virt-maanger instance, the error produced when trying to run the domU is: Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/engine.py", line 498, in run_domain vm.startup() File "/usr/share/virt-manager/virtManager/domain.py", line 573, in startup self.vm.create() File "/usr/lib64/python2.4/site-packages/libvirt.py", line 287, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: POST operation failed: xend_post: error from xen daemon: (xend.err "Error creating domain: Boot loader didn't return any data!") If you drop to the command line to see what pygrub gets back, you get: # pygrub /var/lib/xen/images/fedora12.img Traceback (most recent call last): File "/usr/bin/pygrub", line 677, in ? fs = fsimage.open(file, get_fs_offset(file)) IOError: [Errno 95] Operation not supported The kickstart worked perfectly in Fedora 11 on a CentOS 5.4 dom0. I've tried investigating all sorts of grub options and even tried copying kernel and initramfs files out from the domU to dom0 and booting from those with no luck. The only thing that does work is if I install Fedora 11 and then perform an upgrade to Fedora 12. I really don't want to have to deploy machines this way. Is anyone else experiencing this issue? I can provide any further information requested. Basically, to repeat my error, install CentOS 5.4 with Virtualization, then try to install a Fedora 12 domU. The installation finishes without error but you can't boot. The systems are all x86_64. Thanks. Charles

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Is Ubuntu guest optimized or do I need to install para-virtual drivers manually?
by Neil Aggarwal 31 Dec '09

31 Dec '09

Hello: According to this list of supported guest on RHEL 5.4 KVM: <http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.4/html/Virtuali zation_Guide/chap-Virtualization-KVM_Restrictions_and_support.html> http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.4/html/Virtualiz ation_Guide/chap-Virtualization-KVM_Restrictions_and_support.html RHEL and some Windows guests are automatically optimized with para-virtualized drivers when I install it. Is the same true if I install Ubunto as a guest or is there something I need to do to get the para-virtual drivers installed on it? Thanks, Neil -- Neil Aggarwal, (281)846-8957, <http://UnmeteredVPS.net> http://UnmeteredVPS.net Host Joomla!, Wordpress, phpBB, or vBulletin for $25/mo Unmetered bandwidth = no overage charges, 7 day free trial

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kvm windows 7 attempts: amd 2, intel 0
by Mr. X 28 Dec '09

28 Dec '09

Hello, To explore kvm installs via Virt-Manager, I tried win7 installs in 3 different hosts. All 3 have 2G of RAM or more. Windows 7 Ultimate in 2.5 GB DVD ISO 1) Centos 5.4, AMD am2, Athlon 64 x2 4600+ works 2nd attempt after setup of Br0 (bridged network) virt-manager-0.6.1-8.el5 kvm-83-105.el5_4.13 2) OpenSuSE 11.2, AMD am2, Athlon 64 x2 5200+ works with defaults (Br0 is setup on OS install) virt-manager 0.8.0-5 kvm-0.11.0-4.5 3) Centos 5.4, Intel LGA 775 C2D, E7600 3.0 Ghz fails in shelled kvm and Virt-Manager with Br0 the Intel C2D box works so well - cooler and faster then the other two - but somehow the kvm intel support seems flawed. The win7 install gets past 2 boots and issues a VM exception in vcpu0 right after the third boot. Maybe someone else succeeded with a similar Intel setup. -- Mark /etc/libvirt/qemu/ ------------- win7kvm.xml ------------- <domain type='kvm'> <name>win7kvm</name> <uuid>d9113860-4731-4622-bc2e-54b656e1567a</uuid> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>2</vcpu> <os> <type arch='i686' machine='pc'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> </features> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu'/> <source file='/data2/kvm/win7.img'/> <target dev='hda' bus='ide'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu'/> <source file='/data2/kvm/WIN7_Ultimate_EN_DVD.iso'/> <target dev='hdc' bus='ide'/> <readonly/> </disk> <interface type='bridge'> <mac address='54:52:00:36:a2:59'/> <source bridge='br0'/> <model type='rtl8139'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> </devices> </domain> ----------- unsnip -----------------

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Re: [CentOS-virt] About doing backups with kvm guests
by ml＠johestephan.de 16 Dec '09

16 Dec '09

Hi all, just to add some ideas to lvm snapshots. As far as I know ist there no need to dd the hole disk. It should fit if you just make the lvm snap ant mount it to any device you want. So you could pack the hole img and store it via bacula or something else. And you normally dont need to shut down the system. The snapshot tooks a bit longer but should even do it while the system is in use. So just: - take the snap - mount it - pack it Dont hit me if i am not right :-) Greetz Jörg

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Shutdown windows-vm hangs
by Ingmar 16 Dec '09

16 Dec '09

Hello I have a problem with CentOS 5.4, kvm and libvirt. Although my VM with Windows Server 2k3 supports ACPI the shutdown of the VM does not work. Once a user is logged on, Windows sends an application popup ("Other people logged on ...") and wait for user-action. The shutdown hangs up and the VM's will be terminated hard. Does anyone know a way to resolve this problem? Regards

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Libvirt problem - centos 5.4 / xen 3.4.2 all x86_64
by For＠ll 16 Dec '09

16 Dec '09

Hi, Anyone have that problem xen installation? [root@xen64-dev ~]# virsh autostart appl error: Failed to mark domain appl as autostarted error: internal error sexpr2string failed root@xen64-dev opt]# rpm -qa |grep libvirt libvirt-client-0.7.0-6.el5 libvirt-python-0.7.0-6.el5 libvirt-0.7.0-6.el5 [root@xen64-dev opt]# rpm -qa |grep xen xen-libs-3.4.2-2.el5 kernel-xen-2.6.18-164.6.1.el5 xen-3.4.2-2.el5 For@ll P.S Maybe newer version libvirt 0.7.4 is working fine? It's exist any repo where I find libvirt-0.7.4 for centos 5.4 ?

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KVM, network bridge with 2 NIC environment
by rewing 14 Dec '09

14 Dec '09

My server have 2 network Interface Cards (NIC). I just found if I create br0 and add both eth0 and eth1 to br0, I'll get errors: eth1: received packet with own address as source address. .. eth0: received packet with own address as source address. I still don't figure out how to set ifcfg-br0 and ifcfg-eth* to make guest os as a server just like host server in the LAN. can anybody post example for this 3 scripts?

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Re: [CentOS-virt] About doing backups with kvm guests
by Christopher G. Stach II 13 Dec '09

13 Dec '09

----- "carlopmart" <carlopmart(a)gmail.com> wrote: > which is the best form to backup and restore these windows guests? > Some examples? Shadow copy and amanda/zmanda. > I see snapshot's lvm option, but I think that this option it is not > valid for > windows guests... It's valid if you don't need a clean backup. :) Usually, a dump of a snapshot is good enough if it is read-mostly. It's probably better than nothing, although not recommended since there are no guarantees. > probably I need to use dd?? But if i use dd, how can > I restore lvm > image onto another host with lvm partitions? dd -- Christopher G. Stach II http://ldsys.net/~cgs/

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Re: [CentOS-virt] KVM: bridge configuration for static IP address
by rewing 12 Dec '09

12 Dec '09

>To: Discussion about the virtualization on CentOS ><centos-virt(a)centos.org> Message-ID: ><448255702.63.1260531144350.JavaMail.root(a)mail.chi.ldsys.net> >Content-Type: text/plain; charset=utf-8 >----- "rewing" <rewing(a)howfortune.com> wrote: >> I need to allocate public IP address to two guest os. >> > >I have only 2 network card Interface on server. say eth0 and eth1. > > > >I set eth1 a public IP address. so it should in >> >> # vi /etc/sysconfig/ifcfg-eth1 > > > >DEVICE=eth1 > >BOOTPROTO=static > >HWADDR=00:1a:4d:83:ad:00 > >BROADCAST=202.127.29.0 > >IPADDR=202.127.29.5 > >NETMASK=255.255.255.0 > >NETWORK=202.127.29.0 > >ONBOOT=yes > >TYPE=Ethernet > > > >Question 1: do I have to add GATEWAY=202.127.29.1 to above setting? >GATEWAY probably belongs in /etc/sysconfig/network... >> Question 2: do I need to add the rest 2 IP addresses in br0? >Nope. >> or I >> should keep br0 with no IP address and set IP in guest OS directly? >Yep. However, if you do that, you will need something acting as the gateway. If your host is going to be the gateway, it will need an address set in ifcfg->br0 and packet forwarding turned on. If eth1 and br0 are both in the same [public] network, you should just set the public IP address on br0 and add both eth0 and eth1 to the bridge and turn on STP. >(I don't see why you need eth0 in this mix at all if you are just using it for guests on the local machine.) >-- >Christopher G. Stach II >http://ldsys.net/~cgs/ Hi,Christopher, Thanks, But still I'm a little confused. Actually I don't need host to be a gateway. There're should be gate way's on that IDC center. So the gate way should be add to /etc/sysconfig/network, right? And still, I have 2 ehtnet interface on my mainboard. So I should allocate eth1 an IP address for host, and only make eth0 as br0, and set guest OS IP address in guest OS network configuration, right? Please help to check if this is the correct setting as bellow /etc/sysconfig/ifcfg-eth1 DEVICE=eth1 BOOTPROTO=static HWADDR=00:1a:4d:83:ad:00 BROADCAST=202.127.29.0 IPADDR=202.127.29.5 NETMASK=255.255.255.0 NETWORK=202.127.29.0 ONBOOT=yes TYPE=Ethernet /etc/sysconfig/ifcfg-eth0 DEVICE=eth0 HWADDR=00:1a:4d:83:ad:50 ONBOOT=yes BRIDGE=br0 /etc/sysconfig/ifcfg-br0 DEVICE=br0 TYPE=Bridge BOOTPROTO=none ONBOOT=yes DELAY=0 will this work so host os and 2 guest oses all got their IP address? or I should modify something?

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Re: [CentOS-virt] KVM: bridge configuration for static IP address-latest
by rewing 12 Dec '09

12 Dec '09

>To: Discussion about the virtualization on CentOS ><centos-virt(a)centos.org> Message-ID: ><448255702.63.1260531144350.JavaMail.root(a)mail.chi.ldsys.net> >Content-Type: text/plain; charset=utf-8 >----- "rewing" <rewing(a)howfortune.com> wrote: >> I need to allocate public IP address to two guest os. >> > >I have only 2 network card Interface on server. say eth0 and eth1. > > > >I set eth1 a public IP address. so it should in >> >> # vi /etc/sysconfig/ifcfg-eth1 > > > >DEVICE=eth1 > >BOOTPROTO=static > >HWADDR=00:1a:4d:83:ad:00 > >BROADCAST=202.127.29.0 > >IPADDR=202.127.29.5 > >NETMASK=255.255.255.0 > >NETWORK=202.127.29.0 > >ONBOOT=yes > >TYPE=Ethernet > > > >Question 1: do I have to add GATEWAY=202.127.29.1 to above setting? >GATEWAY probably belongs in /etc/sysconfig/network... >> Question 2: do I need to add the rest 2 IP addresses in br0? >Nope. >> or I >> should keep br0 with no IP address and set IP in guest OS directly? >Yep. However, if you do that, you will need something acting as the gateway. If your host is going to be the gateway, it will need an address set in ifcfg->br0 and packet forwarding turned on. If eth1 and br0 are both in the same [public] network, you should just set the public IP address on br0 and add both eth0 and eth1 to the bridge and turn on STP. >(I don't see why you need eth0 in this mix at all if you are just using it for guests on the local machine.) >-- >Christopher G. Stach II >http://ldsys.net/~cgs/ Hi,Christopher, Thanks, But still I'm a little confused. Actually I don't need host to be a gateway. There're should be gate way's on that IDC center. So the gate way should be add to /etc/sysconfig/network, right? And still, I have 2 ehtnet interface on my mainboard. So I should allocate eth1 an IP address for host, and only make eth0 as br0, and set guest OS IP address in guest OS network configuration, right? Please help to check if this is the correct setting as bellow /etc/sysconfig/network-scripts/ifcfg-eth1 DEVICE=eth1 BOOTPROTO=static HWADDR=00:1a:4d:83:ad:00 BROADCAST=202.127.29.0 IPADDR=202.127.29.5 NETMASK=255.255.255.0 NETWORK=202.127.29.0 ONBOOT=yes TYPE=Ethernet /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 HWADDR=00:1a:4d:83:ad:50 ONBOOT=yes BRIDGE=br0 /etc/sysconfig/network-scripts/ifcfg-br0 DEVICE=br0 TYPE=Bridge BOOTPROTO=none ONBOOT=yes DELAY=0 will this work so host os and 2 guest oses all got their IP address? or I should modify something? I just try the above setting and it wont work!! It seems that I only need Ethernet interface and set br0 as host IP address ,and guest OS have their own IP address. But I have 2 Ethnet Interface, it seems deappreciate netbroadband if I couldn't use one for host and the other for guest? or I have to add more IP address for eth1?

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virt December 2009