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[libvirt-users] KVM and <interface type='ethernet'>
by Maximilian Wilhelm 07 Jul '11

07 Jul '11

Hi! I'm trying to set up a VM with "just an tap device" with the following config (basicly inherited from 'virsh domxml-from-native qemu-argv'): <domain type='kvm'> [...] <interface type='ethernet'> <mac address='52:54:1f:ac:08:51'/> <target dev='foo_eth0'/> <model type='virtio'/> </interface> [...] </devices> </domain> This sadly failes with: | error: Failed to start domain foo | error: internal error process exited while connecting to monitor: could not configure /dev/net/tun: Device or resource busy I'm wondering why this fails as there shouldn't anything be done with the tap device besides setting it up. (The basic goal would be to set up a VM with a tap device, put an v4 and v6 IP on it and let OSPF do the rest. As the <script> parameter will not work with dropped privileges I wrote a wrapper for the kvm binary which takes care of this via sudo. This part works, but I fail to get the VM started with <interface type='ethernet'>) Any ideas? Thanks Max -- <@uschebit> Das erklärt die Sitte. Das ist so ähnlich wie mit dem Verbeugen zur Begrüßung in Japan. Das dient auch nur dazu, durch Begutachten der Schuhqualität den sozialen Rang festzustellen.

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[libvirt-users] Is arping useful if a VM is brought up on a different (bridged) interface/machine?
by Whit Blauvelt 07 Jul '11

07 Jul '11

Hi, Using libvirt/qemu/kvm VMs, if a VM has stopped on one host and then the identical VM is started afresh on a different host, with the exact same (bridged) VM IP, would there be a point in having the VM run arping (or arping2) on startup to help it be quickly found on the LAN? Or is this built in at some level already? Or does it not apply here? Thanks, Whit

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[libvirt-users] SSH console for qemu
by Nikita A Menkovich 07 Jul '11

07 Jul '11

Hello, I'm using qemu with libvirt and I want to create SSH emergency console to linux/unix guests, same way as it is realized in qemu VNC. Maybe someone could help me to determine a place to dive in this question. I think the best way to make it - extend qemu API. But if this could be made with libvirt - this will be also fine. -- Nikita A Menkovich http://libc6.org/ JID: menkovich(a)gmail.com

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[libvirt-users] Guest-networking: Two subnets = Guests cannot connect to the other subnet
by mailinglists＠florian-kaiser.net 07 Jul '11

07 Jul '11

Hello list, We have KVM setup using libvirt (0.9.0) as configuration device on a Debian Squeeze Host. Networking is done in routed bridge mode and we have two different subnets, as well as one main ip. Subnets get routed to the main ip (this is done by our provider). Network on hosts are done like this: <network> <name>subnet_1</name> <uuid>7c60990d-ab31-c4a5-cd2b-5ce4c7c61d38</uuid> <forward dev='eth0' mode='route'/> <bridge name='virtbridge1' stp='off' delay='0' /> <mac address='52:54:00:4D:83:2A'/> <ip address='xx.xx.240.121' netmask='255.255.255.248'> </ip> </network> <network> <name>subnet_2</name> <uuid>7c60990d-ab31-c4a5-cd2b-5ce4c7c61d38</uuid> <forward dev='eth0' mode='route'/> <bridge name='virtbridge1' stp='off' delay='0' /> <mac address='52:54:00:4D:83:2A'/> <ip address='xx.xx.240.200' netmask='255.255.255.248'> </ip> </network> Routing on host Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface xx.xx.122.33 0.0.0.0 255.255.255.255 UH 0 0 0 eth0 xx.xx.240.120 0.0.0.0 255.255.255.248 U 0 0 0 virtbridge1 xx.xx.239.200 0.0.0.0 255.255.255.248 U 0 0 0 virtbridge2 0.0.0.0 xx.xx.122.33 0.0.0.0 UG 0 0 0 eth0 Guests get this: <interface type='network'> <mac address='de:ad:b6:83:85:5b'/> <source network='subnet_1'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> Guests put this into interfaces: iface eth0 inet static address xx.xx.239.202 netmask 255.255.255.248 gateway xx.xx.239.201 Guest routing Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface xx.xx.239.200 0.0.0.0 255.255.255.248 U 0 0 0 eth0 0.0.0.0 xx.xx.239.201 0.0.0.0 UG 0 0 0 eth0 Everything seemed to work just fine, that is: Guests could connect - to host, - to internet - to other virtual maschines in the same subnet - all vice-versa. Internet can connect to any guest and our host can connect to any guest, too. Then, we needed one guest to connect to a guest from the other subnet. And this does not work, what I get follows: PING xx.xx.240.122 (xx.xx.240.122) 56(84) bytes of data. >From xx.xx.239.201 icmp_seq=1 Destination Port Unreachable >From xx.xx.239.201 icmp_seq=2 Destination Port Unreachable Note, that I can ping the other subnets gateway just fine! But I cannot connect to any of the other subnet IPs. I believe this is just a routing problem, but I cannot figure out what route to add where. Please ask if you need any more information.

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[libvirt-users] (no subject)
by Abhishek Gupta 05 Jul '11

05 Jul '11

Hello I am having a libvirt installation on kvm, ubuntu 10.04. A few months ago, I setup a cloud on the hypervisors which was functioning really cool. But from last two-three days I am getting following error on using function snapshotListNames in python. >>> snapshots=dom.snapshotListNames(0) libvir: Remote error : unknown procedure: 187 Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python2.7/dist-packages/libvirt.py", line 890, in snapshotListNames if ret is None: raise libvirtError ('virDomainSnapshotListNames() failed', dom=self) libvirt.libvirtError: unknown procedure: 187 Any ideas so as what could be causing the error? -- Abhishek Webpage <http://abhishekgupta92.info/> !!! Blog<http://thelazy.info/abhishek>

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[libvirt-users] Associating a statefile with an image
by sethuraman subbiah 05 Jul '11

05 Jul '11

Hi , I am trying to perform offline migration (i.e) Create an incremental image using the qcow format, transfer the vm memory state to a state fie.Use the image and statefile together as a template. Now create a new vm using the template. I can successfully do it using the following commands : Save phase : stop migrate "exec:gzip -c > STATEFILE.gz" qemu-img qemu-img create -b BASE_img -f qcow2 INCRE_img Restore phase : qemu-kvm -m 1024 -hda INCRE_img -incoming "exec: gzip -c -d STATEFILE.gz" And it works fine. But I am not able to find the vm with virt-manager or other libvirt based tools. If I use : virsh save <dom_id> STATEFILE I can restore using "virsh restore STATEFILE" but I want to associate this with the incremental image that I created, but I dont know how. I think it saves the existing vm's xml file along with the STATEFILE, thus I am not able to change the disk image to the incremental image. Thus , 1. Either I should find a way to make vms created using qemu-kvm appear in libvirt-based tools. OR 2. Find a way to associate the virsh save STATEFILE with a incremental image. Any help or hint with respect to these will be very helpful. I am try to do cloning with minimal cost. This takes only 25 seconds ( to create STATEFILE) and creating incremental image is instantatenous . But I want to use the vm monitoring code based on libvirt. And it makes life difficult. Thanks for your help. - Regards, Sethuraman Subbiah Graduate Student - NC state University M.S in Computer Science

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[libvirt-users] Xm driver only supports modifying persistent config.
by zhuxuegang 05 Jul '11

05 Jul '11

Dear all. I use libvirt to attach a volume to xen's guest VM,but l got the following message: Attached device: /dev/sdb [Mon Jul 4 09:18:58 2011][006640][EUCAERROR ] libvirt: Requested operation is not valid: Xm driver only supports modifying persistent config (code=55) [Mon Jul 4 09:18:58 2011][006640][EUCAERROR ] AttachVolume() failed (err=-1) XML=<disk type='block'><driver name='phy'/><source dev='/dev/sdb'/><target dev='sdae'/></d isk> [Mon Jul 4 09:18:58 2011][006640][EUCAERROR ] ERROR: doAttachVolume() failed error=1 [Mon Jul 4 09:19:02 2011][006640][EUCADEBUG ] doDescribeResource() invoked [Mon Jul 4 09:19:02 2011][006640][EUCADEBUG ] doDescribeInstances() invoked any help will be greatly appreciated. Thank you in advance... 2011-07-05 zhuxuegang

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[libvirt-users] Helping on libvirt
by negar behinaeen 02 Jul '11

02 Jul '11

*Writting myVirt* ------------------------------ Dear all, I'm new in libvirt. I would be glad if you help me. I want to write a program for controlling all libvirt servers named "MYVIRT". The libvirtd works as fallow: { CLIENT } ---------------------> { SERVER A } | | ------------------------------> { SERVER B } Now, I want to place MYVIRT between client and libvirtd servers. By calling a command, MYVIRT should execute the command for all servers. { CLIENT } | | { MYVIRT } ---------------------> { SERVER A } | | ------------------------------> { SERVER B } The client softwares for libvirtd are virsh and virt-manager. Now I want them to connect to MYVIRT and look it as a libvirtd server. Would you please guide me for connecting to MYVIRT through virsh and execute a command on all servers?

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[libvirt-users] Unable to boot from a vdi image
by yeswanth swami 02 Jul '11

02 Jul '11

Hi, I am not able to boot a vdi image on virtualbox using libvirt .It keeps showing me "Bootable medium not found". I have tried booting it manually with virtualbox GUI and it boots without any problem. May there is some problem with my libvirt domain XML . I also realized on some investigation that it is not detecting the vdi image file as a hard disk (when i am booting from a live cd) A part of my libvirt domain XML is here: <os> <type>hvm</type> <boot dev='hd'/> </os> ------------------------------ <devices> <disk type='file' device='disk'> <source file='disk.vdi'/> <target dev='hdd' bus='ide'/> </disk> </devices> Thanks for replying -- Cheers, Yeswanth

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[libvirt-users] [PATCH] Use correct param names in Product getters
by Zeeshan Ali (Khattak) 01 Jul '11

01 Jul '11

From: "Zeeshan Ali (Khattak)" <zeeshanak(a)gnome.org> --- osinfo/osinfo_product.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/osinfo/osinfo_product.c b/osinfo/osinfo_product.c index 89e01bd..bbbcf67 100644 --- a/osinfo/osinfo_product.c +++ b/osinfo/osinfo_product.c @@ -158,15 +158,15 @@ void osinfo_product_add_related(OsinfoProduct *product, OsinfoProductRelationshi const gchar *osinfo_product_get_vendor(OsinfoProduct *prod) { - return osinfo_entity_get_param_value(OSINFO_ENTITY(prod), OSINFO_PRODUCT_PROP_NAME); + return osinfo_entity_get_param_value(OSINFO_ENTITY(prod), OSINFO_PRODUCT_PROP_VENDOR); } const gchar *osinfo_product_get_version(OsinfoProduct *prod) { - return osinfo_entity_get_param_value(OSINFO_ENTITY(prod), OSINFO_PRODUCT_PROP_NAME); + return osinfo_entity_get_param_value(OSINFO_ENTITY(prod), OSINFO_PRODUCT_PROP_VERSION); } const gchar *osinfo_product_get_short_id(OsinfoProduct *prod) { - return osinfo_entity_get_param_value(OSINFO_ENTITY(prod), OSINFO_PRODUCT_PROP_NAME); + return osinfo_entity_get_param_value(OSINFO_ENTITY(prod), OSINFO_PRODUCT_PROP_SHORT_ID); } const gchar *osinfo_product_get_name(OsinfoProduct *prod) { -- 1.7.5.4

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