Re: [libvirt] how to use macvtap in kvm guest
Hi, No guest can not get ip. When I do ifup eth0 it give error device not found. Hostos=rhel 6.x86_64 Guest os= rhel 6.x86_64 Libvirt =0.8.7 Macvtap driver is loaded. Qemu-kvm= 0.12.1.2 i think this error is creating problem macvtap0:no ipv6 routers present ________________________________ From: xhu [mailto:xhu@redhat.com] Sent: Friday, December 09, 2011 10:53 AM To: Amit Tewari Cc: libvir-list@redhat.com Subject: Re: [libvirt] how to use macvtap in kvm guest On 12/09/2011 12:28 PM, Amit Tewari wrote: Hi I am creating macvtap0 interface on my eth1 interface. ip link show macvtap0 133: macvtap0@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UNKNOWN qlen 500 link/ether 3e:63:18:f3:49:63 brd ff:ff:ff:ff:ff:ff guest interface file- <interface type='direct'> <mac address='3e:63:18:f3:49:63'/> <source dev='eth0' mode='bridge'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </interface> Now when I do- Virsh define guest works fine But when I do virsh start guest can guest gain ip? Dmesg shows error macvtap0:no ipv6 routers present libvirtd[24907]: segfault at 0 ip 0000003e22280062 sp 00007fd3057f8cb8 error 4 in libc-2.12.so[3e22200000+187000] and even if guest starts its eth interface is not created could you provide your host os, guest os, libvirt, qemu-kvm version? it is fine as i tried, no segment fault message and the guest can get ip. DISCLAIMER: ------------------------------------------------------------------------ ----------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or NECHCL or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of NECHCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. . ------------------------------------------------------------------------ ----------------------------------------------- -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list DISCLAIMER: ----------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or NECHCL or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of NECHCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. . -----------------------------------------------------------------------------------------------------------------------
Please do not top post in replies - make your replies to questions inline, it makes following the conversation *much* easier. On 12/09/2011 02:00 AM, Amit Tewari wrote:
Hi,
No guest can not get ip.
When I do ifup eth0 it give error device not found.
Hostos=rhel 6.x86_64
Guest os= rhel 6.x86_64
Libvirt =0.8.7
Macvtap driver is loaded.
Qemu-kvm= 0.12.1.2
i think this error is creating problem
macvtap0:no ipv6 routers present
------------------------------------------------------------------------
*From:*xhu [mailto:xhu@redhat.com] *Sent:* Friday, December 09, 2011 10:53 AM *To:* Amit Tewari *Cc:* libvir-list@redhat.com *Subject:* Re: [libvirt] how to use macvtap in kvm guest
On 12/09/2011 12:28 PM, Amit Tewari wrote:
Hi
I am creating macvtap0 interface on my eth1 interface.
ip link show macvtap0
133: macvtap0@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UNKNOWN qlen 500
link/ether 3e:63:18:f3:49:63 brd ff:ff:ff:ff:ff:ff
Are you saying that you're manually creating a macvtap0 device outside of libvirt? Or are you just showing us the macvtap device that libvirt is creating?
guest interface file-
<interface type='direct'>
<mac address='3e:63:18:f3:49:63'/>
<source dev='eth0' mode='bridge'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</interface>
Now when I do-
Virsh define guest works fine
But when I do virsh start guest
can guest gain ip?
Dmesg shows error
dmesg on the host, correct?
macvtap0:no ipv6 routers present
libvirtd[24907]: segfault at 0 ip 0000003e22280062 sp 00007fd3057f8cb8 error 4 in libc-2.12.so[3e22200000+187000]
Does this segfault happen every time? If you have a RHEL subscription, you should open a ticket with Red Hat support. Have you rebooted the host since you first encountered this error - I have seen cases where old stale macvtap devices stuck around, preventing the creation of a new device with the same name. If it's feasible to upgrade, you may want to do so - RHEL 6.2 (with libvirt-0.9.4) was released on Wednesday.
and even if guest starts its eth interface is not created
could you provide your host os, guest os, libvirt, qemu-kvm version?
Also useful for debugging - the last qemu command listed in /var/log/libvirt/qemu/$guestname.log Additionally, the output of "virsh dumpxml $guestname" (in particular the <interface> section) while the guest is running (this will be different from the "inactive" version you've provided above).
it is fine as i tried, no segment fault message and the guest can get ip.
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