February 2013 - Users - libvirt List Archives

[libvirt-users] VMs XML difinitions can't be recognized after upgrading to libvirt 0.9.13
by Marwan Tanager 27 Feb '13

27 Feb '13

I used to run many VMs on my Ubuntu 10.04 box. However, after upgrading to Ubuntu 12.10 (and thus, libvirt 0.9.13), The VMs can't be recognized anymore. Nothing appears in the output of 'virsh list --all', nor in virt-manager. When I created a new VM based on a disk image of one of the not-recognized-any-more VMs, a new schema file has been auto-generated, and the new VM now is recognized. So, if this is caused by incompatibility with the old schemas, would the solution be to manually recreate all the VMs by importing their disk images to the newly created VMs, or is there a more intelligent approach? Thanks for your time. Marwan

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[libvirt-users] [libvirt-php] network string name
by Yusof Khalid - FreeBSD / OpenBSD 27 Feb '13

27 Feb '13

Hi list, So this is my first question on this list :) I'm working for my script to get network information for our guest os (Using Xen 3) using PHP libvirt. Just get confused for function libvirt_network_get($res, $name) $name should be network name string as per the doc. What is the value for that ? is it the name in ifconfig list that attach with the guest os e.g vif101 ? Thanks in advance. -- -- 7.2-RELEASE-p6

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[libvirt-users] Routed network w/o libvirt adding iptables rules
by Nils Toedtmann 27 Feb '13

27 Feb '13

Hello In the case of a "routed" libvirt network, is there a way to prevent libvirt from adding *any* iptables rules? Or at least to stop libvirt from inserting its rules at the *top* of the chains (which renders previously inserted rules useless)? I have VPN tunnels connecting VMs with each other and with clients, and the default rules generated by libvirt are not right for my use case. The firewall rulesets i actually need are quite simple. I am very happy to manage them outside libvirt. I am thinking of replacing /sbin/iptables with a dummy, but that is a last ressort which i hope is not necessary. Please advise /nils. PS: See also long standing libvirt issues: * https://bugzilla.redhat.com/show_bug.cgi?id=533193 * https://bugzilla.redhat.com/show_bug.cgi?id=689377

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[libvirt-users] How to add static routes?
by Nils Toedtmann 26 Feb '13

26 Feb '13

Hello i have several libvirt hosts (CentOS6, kvm), each with an internal libvirt "default" network with "forward mode='route'". I have two questions concerning static routes. To give some context: On each of my libvirt hosts there is a VM acting as a OpenVPN-gateway to the other libvirt hosts. [A] How can i add a persistant static route on the libvirt host to one of its guests? Someone had already asked this on this list in 2011 but apperently did not receive an answer [1]. Likewise, i found that a /etc/sysconfig/network-scripts/route-virbr0 does not get applied when libvirt starts its default network. [B] How can i make libvirt's dnsmasq push static routes into the guests? Apperently dnsmasq supports pushing of static routes using DHCP options 33 or 121 [2], e.g. "--dhcp-option=121,x.x.x.x/yy,z.z.z.z". But i did not find how to add that to a libvirt network declaration. I know that if i had [A] working, the host could redirect the IP traffic on behalf of the guests, but i'd like to avoid the resulting extra hop and the flood of ICMP redirects. Please advise. Cheers /nils. [1] https://www.redhat.com/archives/libvirt-users/2011-December/msg00061.html [2] http://tools.ietf.org/html/rfc3442

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[libvirt-users] shutdown a windows guest take ages..... (20- 34 minutes here)
by weber＠zackbummfertig.de 26 Feb '13

26 Feb '13

hi, i use libvirt 1.0.2 (-r1 , gentoo linux). when i create a vm with win7 guest, virtio nic, virtio hdd, all is running fine. but when i shutdown the windows guest, it takes somestimes 20-34 minutes !!! iotop shows me in the whole time writing with 2,xxmb/sec. is the complete machine "rewritten" to disk? i use disk.images on a raid6, but hey, dd shows me it can writes there with 26mb/sec. any ideas what causes these long shutdown times? thanks for any hints, marko

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[libvirt-users] Per-driver Disk Image Type Support
by Shea Levy 25 Feb '13

25 Feb '13

Hello, Where can I find documentation about which formats for disk images each driver supports? In particular, do they all support raw disk images? Thanks, Shea Levy

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[libvirt-users] vda or sda in the guest
by Robert Smol 23 Feb '13

23 Feb '13

Hello, I've used virt-install + kickstart to setup machine. Then I've moved the script to a production machine and in the guest the disk was not 'vda' but 'sda', how is this done? There are differencet vesrions of libvirt between my fedora (tesing system) and gentoo (production system). Robert

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[libvirt-users] Support for Hyper-V
by Hassan Shaik 22 Feb '13

22 Feb '13

Hi, I would like to know if libvirt support Hyper-V deployed in Windows 2012 server. Does libvirt talk to Hyper-V using the REST API provided by Microsoft (where SCVMM & SPF are deployed)? >From the web site, I see that libvirt support only "Hyper-V 2008 R2" Many thanks in advance. Hassan

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[libvirt-users] Migrate VM's to different storage pool?
by Jamie Fargen 22 Feb '13

22 Feb '13

I am searching for directions for using live block migration to copy running vm's to a different storage pool. Example: VM1 running on Host1, the image(s) for VM1 are stored in /var/lib/libvirt/images. I'd like to copy the disk image(s) that VM1 is using to /nfs/images. Without stopping/pausing/powering down the VM. Do you have any examples or documentation of how to accomplish this process? Regards, Jamie Ian Fargen

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[libvirt-users] Host information from libvirt KVM/Xen
by Parakkal, Navin S 16 Feb '13

16 Feb '13

Hi, I'm able to get the CPU utilization metrics from libvirt for the guests (VM's) remotely . Is it possible to get the Host Cpu stat's through libvirt ? I didn't find any information regarding the host cpu cycles and memory utilization to collect them remotely. Libvirt is installed on all the hosts. Regards, Navin

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