January 2011 - Users - libvirt List Archives

Re: [libvirt-users] libvirt unavailable while a VM is in migration?]
by Igor Serebryany 24 Mar '11

24 Mar '11

On Mon, Dec 20, 2010 at 02:14:42PM +0100, Jiri Denemark wrote: > Ouch, I wonder if that could be the reason... Just to make sure that my strange compiling/packages aren't causing the problem, I've set up two servers running fedora 14 with the official libvirt packages. i experience the same problem -- while a vm is in migration, nothing else works. my traces reveal libvirt getting stuck at the same exact spot as on my debian machines. at this point, i'm pretty sure that this is a bug in libvirt. Has libvirt ever had the ability to perform other operations while a qemu migration is in progress? If so than this is a regression, and a pretty serious one. For me, this makes live-migrations totally unusable, and since I cannot run my project without live-migrations and I cannot use any outside tools to do live-migrations when I'm using libvirt this makes libvirt totally unusable. i am desperate to get this bug fixed, and i don't think i have the resources to try to patch it myself. is there anything i can do to help you guys? more debugging info? foot massage? --Igor

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[libvirt-users] libvirt, snapshots, LVM, and existing VMs
by Casey Link 05 Feb '11

05 Feb '11

Hello, I am running libvirt 0.8.3 with a couple VMs using a LVM VG that I had previously setup on my host. I did not use the storage pool functionality of libvirt to create the VG in the first place ('pool-list' is empty). Now I want to be able to take snapshots of the VMs. Having read this previous post [1] on the mailing list, I gather that libvirt does indeed support taking snapshots of VMs on an LVM. I suppose I need to create storage pool that includes the <backingStore> element. However, I am not sure how to go about creating this pool and making my existing VMs utilize it. Is what I am trying to do even possible? If so, what is the proper way to go about doing it? Best, Casey Link [1] http://www.redhat.com/archives/libvir-list/2009-February/msg00196.html

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[libvirt-users] libvirt bridge configuration
by Taras Lipatov 31 Jan '11

31 Jan '11

Hi Every one, I'm hoping some one can point me in the right direction. We are piloting KVM + Libvirt for migrating off Xen and I'm stuck with the network bridge configuration via libvirt. What we have currently with xen is: 1 server with Wan/lan interfaces and a pool of public ip addresses. Using xen bridge scripts I'd start a xenbr0 and attach eth0 (wan) and go ahead and assign public IP's to images attached to xenbr0. Now with creating virbr0, I need to assign it an ip address? and routing methods? what about creating a transparent bridge via libvirt? I kno I can achieve this using bridge utils, but it would be nice to have everything handled by libvirt. Any help would be appreciated. cheers, Taras

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[libvirt-users] Guest interface info under ESX driver
by Sengor 31 Jan '11

31 Jan '11

Hi, Is there a way to fetch the current IP address of a running guest domain (with VMware Tools installed) running on an ESX host? Ideally this would be doable via the libvirt Python bindings. Thank you. -- sengork

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[libvirt-users] syslog messages after cd-rom removal
by Alexander Topolanek 30 Jan '11

30 Jan '11

Sorry, I know this is not really libvirt related, but I'm searching for a solution sind about an hour and cannot find anything that helps me ... Ok, I used to install a standard debian in a kvm instance, and removed the virtual cd-rom after installation. Now I'm getting this triplet every five minutes in my syslog: Jan 26 19:25:12 srv62 kernel: [ 1324.267675] hdc: task_in_intr: status=0x41 { DriveReady Error } Jan 26 19:25:12 srv62 kernel: [ 1324.267683] hdc: task_in_intr: error=0x04 { AbortedCommand } Jan 26 19:25:12 srv62 kernel: [ 1324.267685] ide: failed opcode was: 0xec and I'm looking how to get rid of the device. thanks for any help Alexander

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[libvirt-users] compilation error
by antoni artigues 28 Jan '11

28 Jan '11

Hello I'm trying to compile libvirt-0.8.6 on RHEL4 with kernel 2.6.9-67 The make command returns: -------------------- util/interface.c: In function `ifaceGetVlanID': util/interface.c:355: error: `GET_VLAN_VID_CMD' undeclared (first use in this function) util/interface.c:355: error: (Each undeclared identifier is reported only once util/interface.c:355: error: for each function it appears in.) make[3]: *** [libvirt_util_la-interface.lo] Error 1 make[3]: Leaving directory `/root/InstalledPackages/libvirt-0.8.6/src' make[2]: *** [all] Error 2 make[2]: Leaving directory `/root/InstalledPackages/libvirt-0.8.6/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/root/InstalledPackages/libvirt-0.8.6' make: *** [all] Error 2 -------------------- I have saw that GET_VLAN_VID_CMD should be in if_vlan.h file, but it is not present. What do I have to update in my system to avoid this error? Thanks in advance regards Antoni Artigues

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[libvirt-users] libvirtd + vir-manager + kerberos
by Thomas Schweikle 28 Jan '11

28 Jan '11

Hi! Having two hosts installed with libvirtd, kvm, qemu on (Ubuntu 10.10). Now I have one big problem and one less: I have set up kerberos for both hosts. Created the principal "libvirt/srv1.example.org(a)EXAMPLE.ORG" and "libvirt/srv2.example.org(a)EXAMPLE.ORG", Exported the krb5.keytab, Installed it and tested the servers: srv1.example.org: I can connect using kerberos after acquiring a ticket with kinit. srv2.example.org: I am asked for user and password. Setup seems to be identical. Is there a way to debug, what is going on on this server? I'd like to have both respect kerberos and allow logging in with no password it already authenticated! Here is what I've set up: /etc/sasl2/libvirt.conf listen_tls = 0 listen_tcp = 1 mdns_adv = 0 auth_unix_ro = "none" auth_unix_rw = "none" auth_tcp = "sasl" /etc/sasl2/libvirt.conf mech_list: gssapi keytab: /etc/libvirt/krb5.kqemu sasldb_path: /etc/libvirt/passwd.db I start libvirtd with: KRB5_KTNAME=/etc/libvirt/krb5.kqemu /usr/sbin/libvirtd -d --listen In virt-manager I've set both hosts: qemu+tcp://srv1.example.org qemu+tcp://srv2.example.org Since both configs are identical (I've ran diff on them) I am a bit lost at the moment. I do not have any idea why it works for one host, but not the other. Any ideas? -- Thomas

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[libvirt-users] multi-user libvirt / virsh?
by Tomasz Chmielewski 28 Jan '11

28 Jan '11

I was wondering if libvirt / virsh was designed for multi-user environments. I.e. I was thinking of the "roles", i.e. root would be able to do everything, but regular users would only be able to stop/start/suspend, or use vnc with the virtual machines which belong to them. Is it possible with libvirt / virsh? If not, are there any other options to achieve it? -- Tomasz Chmielewski http://wpkg.org

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[libvirt-users] Allocating Sockets Cores and Threads.
by joe fu 26 Jan '11

26 Jan '11

Hi, Is there any other way I could allocate sockets, cores and threads to my virtual machine? I looked over the virsh man page and I didn't find anything that talks about sockets, threads and cores. I edited the vm xml file and added this... <cpu> <topology sockets='1' cores='2' threads='1'/> </cpu> Saw this in the libvirt documents, http://libvirt.org/formatdomain.html Setting this up shows me a single core in my vm, but I don't see any sockets and threads. Can somebody tell me how to do it in a right way so that I see all sockets, cores and threads allocated in my vm. Thanks joe

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[libvirt-users] Is there a way to suppress netfilter rules (default.xml)?
by Oliver Schneider 26 Jan '11

26 Jan '11

Hi, in order to get hook scripts to work, I used a backported version of libvirtd on Ubuntu 10.04 LTS. Here are the details: Compiled against library: libvir 0.8.3 Using library: libvir 0.8.3 Using API: QEMU 0.8.3 Running hypervisor: QEMU 0.12.5 After adjusting the apparmor profile to accept the hook scripts under /etc/libvirt/hooks/, I am able to start and stop domains again, but only the script named "daemon" gets executed, the one named "qemu" gets ignored. All my domains are KVM domains. I thought the "qemu" script should apply to that?! My actual goal is to suppress the rules or better yet execute my own script (in order to amend or replace the libvirt rules) after insertion of the "default" rules during startup of the daemon. The reason being that I need to do some PNAT and other custom handling ... So far I have not been able to catch the state where the bridge has already been created and the rules inserted. Thus I've had to manipulate the firewall rules manually (well, still scripted ;)) after booting the host. Any ideas? Thanks, // Oliver PS: Side-note, I tried using the newfilter facilities, but there seems to be no way to insert rules at the start of a chain and similar things. PPS: # cat /etc/libvirt/qemu/networks/default.xml <network> <name>default</name> <bridge name="virbr%d" /> <forward/> <ip address="192.168.122.1" netmask="255.255.255.0" /> </network>

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