FAQ
Hello ,

I use Centos 5.4 , with the redhat version of xen .
I need for some guest to change the hardware for the network .
So in my xen config i add the model option in the vif line .

When the guest boot , i had the right emulation , but after a reboot , the guest loose the configuration .

Someone can confirm the bug in centos 5.5 ?

Have someone a patch ?



Extract of my config :

builder = "hvm"
vif = [ 'type=ioemu, mac�:16:3e:50:10:45, bridge=xenbr0, model=ne2k_pci']
device_model = "/usr/lib64/xen/bin/qemu-dm"

#grep spa.*/usr/lib64/xen/bin/qemu-dm /var/log/xen/xend.log

[2010-05-24 11:47:23 xend 3782] INFO (image:434) spawning device models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '-d', '75', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', '1', '-k', 'fr', '-domain-name', 'orange', '-net', 'nic,vlan=1,macaddr�:16:3e:50:10:45,model=pcnet', '-net', 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1']
[2010-05-24 11:47:40 xend 3782] INFO (image:434) spawning device models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '-d', '76', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', '1', '-k', 'fr', '-domain-name', 'orange', '-net', 'nic,vlan=1,macaddr�:16:3e:50:10:45,model=rtl8139', '-net', 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1']

#rpm -qa | grep ^xen
xen-libs-3.0.3-94.el5_4.2
xen-3.0.3-94.el5_4.2

#xm info
host : james.mas.nom.fr
release : 2.6.18-164.6.1.el5.centos.plusxen
version : #1 SMP Wed Nov 4 10:10:32 EST 2009
machine : x86_64
nr_cpus : 2
nr_nodes : 1
sockets_per_node : 1
cores_per_socket : 2
threads_per_core : 1
cpu_mhz : 2104
hw_caps : 178bfbff:ebd3fbff:00000000:00000010:00002001:00000000:0000011f
total_memory : 4078
free_memory : 1738
node_to_cpu : node0:0-1
xen_major : 3
xen_minor : 1
xen_extra : .2-164.6.1.el5.
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset : unavailable
cc_compiler : gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)
cc_compile_by : mockbuild
cc_compile_domain : centos.org
cc_compile_date : Wed Nov 4 09:23:54 EST 2009
xend_config_format : 2

--
____________________________________________________________
/ Erwan MAS /\
mailto:erwan at mas.nom.fr |_/
___|________________________________________________________ |
\___________________________________________________________\__/

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  • Pasi Kärkkäinen at May 25, 2010 at 7:43 am

    On Mon, May 24, 2010 at 11:16:56PM +0200, Erwan MAS wrote:
    Hello ,

    I use Centos 5.4 , with the redhat version of xen .
    I need for some guest to change the hardware for the network .
    So in my xen config i add the model option in the vif line .

    When the guest boot , i had the right emulation , but after a reboot , the guest loose the configuration .
    So when you first "xm create" it, it's ok, and after you reboot the guest,
    the NIC model has changed?
    Someone can confirm the bug in centos 5.5 ?
    Did you search Redhat bugzilla?


    -- Pasi

    Have someone a patch ?



    Extract of my config :

    builder = "hvm"
    vif = [ 'type=ioemu, mac�:16:3e:50:10:45, bridge=xenbr0, model=ne2k_pci']
    device_model = "/usr/lib64/xen/bin/qemu-dm"

    #grep spa.*/usr/lib64/xen/bin/qemu-dm /var/log/xen/xend.log

    [2010-05-24 11:47:23 xend 3782] INFO (image:434) spawning device models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '-d', '75', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', '1', '-k', 'fr', '-domain-name', 'orange', '-net', 'nic,vlan=1,macaddr�:16:3e:50:10:45,model=pcnet', '-net', 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1']
    [2010-05-24 11:47:40 xend 3782] INFO (image:434) spawning device models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '-d', '76', '-m', '192', '-boot', 'dc', '-serial', 'pty', '-vcpus', '1', '-k', 'fr', '-domain-name', 'orange', '-net', 'nic,vlan=1,macaddr�:16:3e:50:10:45,model=rtl8139', '-net', 'tap,vlan=1,bridge=xenbr0', '-vnc', '127.0.0.45:1']

    #rpm -qa | grep ^xen
    xen-libs-3.0.3-94.el5_4.2
    xen-3.0.3-94.el5_4.2

    #xm info
    host : james.mas.nom.fr
    release : 2.6.18-164.6.1.el5.centos.plusxen
    version : #1 SMP Wed Nov 4 10:10:32 EST 2009
    machine : x86_64
    nr_cpus : 2
    nr_nodes : 1
    sockets_per_node : 1
    cores_per_socket : 2
    threads_per_core : 1
    cpu_mhz : 2104
    hw_caps : 178bfbff:ebd3fbff:00000000:00000010:00002001:00000000:0000011f
    total_memory : 4078
    free_memory : 1738
    node_to_cpu : node0:0-1
    xen_major : 3
    xen_minor : 1
    xen_extra : .2-164.6.1.el5.
    xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
    xen_pagesize : 4096
    platform_params : virt_start=0xffff800000000000
    xen_changeset : unavailable
    cc_compiler : gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)
    cc_compile_by : mockbuild
    cc_compile_domain : centos.org
    cc_compile_date : Wed Nov 4 09:23:54 EST 2009
    xend_config_format : 2

    --
    ____________________________________________________________
    / Erwan MAS /\
    mailto:erwan at mas.nom.fr |_/
    ___|________________________________________________________ |
    \___________________________________________________________\__/
    _______________________________________________
    CentOS-virt mailing list
    CentOS-virt at centos.org
    http://lists.centos.org/mailman/listinfo/centos-virt
  • Erwan MAS at May 25, 2010 at 8:59 am

    On Tue, May 25, 2010 at 10:43:23AM +0300, Pasi K?rkk?inen wrote:
    On Mon, May 24, 2010 at 11:16:56PM +0200, Erwan MAS wrote:
    Hello ,

    I use Centos 5.4 , with the redhat version of xen .
    I need for some guest to change the hardware for the network .
    So in my xen config i add the model option in the vif line .

    When the guest boot , i had the right emulation , but after a reboot , the guest loose the configuration .
    So when you first "xm create" it, it's ok, and after you reboot the guest,
    the NIC model has changed?
    It's a very old bug :-( .
    Cf http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id�7
    Someone can confirm the bug in centos 5.5 ?
    Centos 5.5 use a new version of xen , and i hope than my bug is fixed in it , but before upgrade i want
    a confirmation .
    Did you search Redhat bugzilla?
    Yes .

    --
    ____________________________________________________________
    / Erwan MAS /\
    mailto:erwan at mas.nom.fr |_/
    ___|________________________________________________________ |
    \___________________________________________________________\__/
  • Pasi Kärkkäinen at May 26, 2010 at 6:33 pm

    On Tue, May 25, 2010 at 10:59:38AM +0200, Erwan MAS wrote:
    On Tue, May 25, 2010 at 10:43:23AM +0300, Pasi K?rkk?inen wrote:
    On Mon, May 24, 2010 at 11:16:56PM +0200, Erwan MAS wrote:
    Hello ,

    I use Centos 5.4 , with the redhat version of xen .
    I need for some guest to change the hardware for the network .
    So in my xen config i add the model option in the vif line .

    When the guest boot , i had the right emulation , but after a reboot , the guest loose the configuration .
    So when you first "xm create" it, it's ok, and after you reboot the guest,
    the NIC model has changed?
    It's a very old bug :-( .
    Cf http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id�7
    For bugs related to Xen in RHEL/CentOS you usually have to search from Redhat bugzilla,
    since Redhat has heavily customized and patches their version of Xen in RHEL5.
    Someone can confirm the bug in centos 5.5 ?
    Centos 5.5 use a new version of xen , and i hope than my bug is fixed in it , but before upgrade i want
    a confirmation .
    Did you search Redhat bugzilla?
    Yes .
    Did you find it from Redhat bugzilla?
    If not, you need to report it there.

    -- Pasi

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postedMay 24, '10 at 9:16p
activeMay 26, '10 at 6:33p
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