August 2010 - Users - libvirt List Archives

[libvirt-users] Updates to cucmber-vhost - guineapigs wanted! :)
by Matthew Macdonald-Wallace 05 Oct '10

05 Oct '10

Hi all, For those of you that are using cucumber for Continuous Integration or similar I've created a set of steps that enable you to use cobbler and cucumber to auto-provision using Libvirt. I've just made some changes to the code however I don't have access to all the hardware/software required to test it fully. If you are able to, please check out the code from http://tinyurl.com/virtcuke (my github repo) and test, posting bugs against the project. Thanks in advance, Matt

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[libvirt-users] Is it possible to live migrate guest OS'es between different versions of kvm/qemu-kvm with libvirt?
by Nils Cant 22 Sep '10

22 Sep '10

Hi, I currently have a couple of Debian KVM servers with all a different version of kvm or qemu-kvm. I can live migrate a guest OS from one server to the other just fine, as long as the version of qemu-kvm is the same. However, when I try to migrate a guest to a server running a newer (or older) version of qemu-kvm, I run into problems. I think this is because the xml configuration differs slightly between version. For example, if I try to migrate from a server running qemu-kvm 0.11.0 to one running qemu-kvm 0.12.4, I get the following error: virt01:~# virsh migrate --live testserver qemu+ssh://192.168.1.7/system error: internal error unable to reserve PCI address 0:0:3 When migrating from kvm 85 to qemu-kvm 0.11.0: virt02:~# virsh migrate --live testserver qemu+ssh://192.168.1.2/system error: Unknown failure Migrating one from 0.12.4 to 0.11.0 just completely breaks libvirt, forcing me to kill -9 libvirtd and the kvm instance, etc. I believe this is caused in part because different versions of qemu-kvm need different xml configurations. To run my testserver on 0.12.4 for example, I need to delete the lines with the PCI id's, just to be able to start it. So, is there a way to make this work? Perhaps tell libvirt to not send the config file when doing a live migrate, and use the xml in /etc/libvirt/qemu instead somehow? Thanks in advance, Nils

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[libvirt-users] C, C++ or Python programming tutorial/manual/guide for libvirt
by Lucas Arbiza 01 Sep '10

01 Sep '10

Hi, I want to develop an application to manage KVM virtual machines. I've been looking for something that helps me to start programming using libvirt in C/C++. The only one documentation I found is in this link: http://libvirt.org/html/libvirt-libvirt.html. Neither Google has helped me! That does not look like a good way to start. So, do you know some useful C, C++ or Python tutorial for libvirt? I prefer C or C++. Thanks in advance. __ Lucas Arbiza email: lucas.arbiza(a)gmail.com celular: +55 (55) 9152 7561 skype: lucas.arbiza <http://br.linkedin.com/in/lucasarbiza> <http://www.google.com/profiles/lucas.arbiza>

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[libvirt-users] Decent How-To now on the wiki for setting up Transport Layer Security
by Justin Clift 30 Aug '10

30 Aug '10

Hi all, For anyone that's interested in setting up TLS with libvirt, but hasn't gotten around to it yet, there's a decent guide on the wiki now: http://wiki.libvirt.org/page/TLSSetup It's user focused (ie SysAdmin's), and has lots of pics explaining concepts, plus shows what needs to be done, and shows how to do it. Please note, it doesn't cover SASL, it's just plain host based TLS. Very much open to feedback on it, if people have suggestions for improvement. Hope that helps. :) Regards and best wishes, Justin Clift

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[libvirt-users] Unable to autostart storage pool.
by Sharad Mishra 28 Aug '10

28 Aug '10

Following xml file was used to create storage pool using 'virsh pool-create <xml>' <pool type='dir'> <name>my-diskpool</name> <uuid>2fbc894e-7619-6cda-a33c-b27fae5fbe8b</uuid> <capacity>136024670208</capacity> <allocation>11416657920</allocation> <available>124608012288</available> <source> <host name='localhost'/> </source> <target> <path>/var/lib/libvirt/images</path> <permissions> <mode>0700</mode> <owner>0</owner> <group>0</group> </permissions> </target> </pool> The command succeeds and a pool is created - # virsh pool-list --all Name State Autostart ----------------------------------------- my-diskpool active no When I try to set it up for autostart, I get - # virsh pool-autostart my-diskpool error: failed to mark pool my-diskpool as autostarted error: invalid argument in pool has no config file Why is it failing to autostart? /etc/libvirt/storage has no xml file. Thanks Sharad Mishra IBM

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[libvirt-users] Installing a VM to a virtio disk
by Brian Roberg 27 Aug '10

27 Aug '10

When provisioning new VMs, is it possible to enable virtio for the guest's storage at the time of the installation? When I try to do so, the Ubuntu installer says, "No root file system is defined" when it gets to the partitioning step. Here's the disk option I'm giving to virt-install: --disk pool=libvirt-pool,size=4,bus=virtio (I'm also using "--os-variant=ubuntulucid".) I've been able to install a new VM using the IDE storage driver first and then switch to virtio after the installation is complete, but it would simplify the process if it could start with virtio right off the bat. I'm using Ubuntu 10.04 LTS ("Lucid") host and guest, which provides libvirt 0.7.5 and kernel 2.6.32. I'm about ready to concede defeat and set up a way to automate making the change after the installation, but I thought I'd ask here first. Thanks! -- Brian

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Re: [libvirt-users] [virt-tools-list] Client certificate paths?
by Cole Robinson 22 Aug '10

22 Aug '10

On 08/12/2010 10:29 AM, Lars Kellogg-Stedman wrote: > Hello all, > > I'm trying to get virsh (and virt-manager) to talk to a remote libvirt > instance. I cannot for the life of me figure out how to tell either > tool where to find client or CA certificates. Do they *really* need > to access the ones in /etc/pki? In particular, the client seems to > want to read the *server's* private key, which for obvious reasons is > only readable by root. > > I feel like I must be missing something obvious...if someone can point > me towards a solution I would really appreciate it. Thanks! > > If it's relevant, I'm running everything under Fedora 13 right now, so > that means libvirt-0.8.2-1.fc13.x86_64 and > qemu-kvm-0.12.3-8.fc13.x86_64. > This is more a libvirt question, so CC-ing libvirt-users. - Cole

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[libvirt-users] Libvirt and iptables rule order
by Brian Pitts 21 Aug '10

21 Aug '10

Hi, On RHEL 5.5, I set up iptables rules for forwarding ports to some of my virtual machines. For example. iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 3380 -j DNAT --to-destination 192.168.123.2:3389 iptables -I FORWARD -d 192.168.123.2 -i eth0 -p tcp -m tcp --dport 3389 -m state --state NEW -j ACCEPT These worked fine, and I saved them with 'service iptables save'. However, upon rebooting the server the forwarding no longer works. When I inspect the configuration with 'iptables -L', I see that the rules libvirt creates were inserted before the rules from /etc/sysconfig/iptables. Since the rules from libvirt include one that rejects any new connections, the data I want forwarded is dropped. For example, target prot opt in out source destination ACCEPT all -- any virbr1 anywhere 192.168.123.0/24 state RELATED,ESTABLISHED ACCEPT all -- virbr1 any 192.168.123.0/24 anywhere ACCEPT all -- virbr1 virbr1 anywhere anywhere REJECT all -- any virbr1 anywhere anywhere reject-with icmp-port-unreachable REJECT all -- virbr1 any anywhere anywhere reject-with icmp-port-unreachable ACCEPT tcp -- eth0 any anywhere 192.168.123.2 tcp dpt:ms-wbt-server state NEW How should I configure iptables so that my rules and libvirt's play nicely? Basically I need my ACCEPTs to end up before libvirt's REJECTs. I looked through the list archives and libvirt documentation but did not see an answer to this question. -- Brian Pitts Systems Administrator | EuPathDB Bioinformatics Resource Center 706-542-1447 | bdp(a)uga.edu | http://eupathdb.org

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[libvirt-users] how to Create virtual machine
by Saravanan S 20 Aug '10

20 Aug '10

Hi, I am working on a virtualization project that involves setting up virtual appliances to implement the same, which tool is required to 1) create virtual appliances 2) deploy virtual appliances 3) manage virtual appliances/virtual machines Could you please guide me with some pointers or resources to get started with the creation of virtual machines? I am little confused with libvirt with Xen and qemu. how does xen or qemu related with libvirt ? Thank you. Saravanan Sundaramoorthy Red Hat Certified Engineer http://www.google.com/profiles/dearsaravanan#about +91 99404 32545

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[libvirt-users] libvirt support spice protocol
by Songwen Liao 20 Aug '10

20 Aug '10

Hi,everyone, there is a problem with libvirt support spice protocol. i use the following patch file,but it seems not success.anyone have an idea about that? thanks. patch file: This adds an element <graphics type='spice' port='5903' tlsPort='5904' listen='127.0.0.1'/> This is the bare minimum that should be exposed in the guest config for SPICE. Other parameters are better handled as per host level configuration tunables * docs/schemas/domain.rng: Define the SPICE <graphics> schema * src/domain_conf.h, src/domain_conf.c: Add parsing and formatting for SPICE graphics config * src/qemu_conf.c: Complain about unsupported graphics types --- docs/schemas/domain.rng | 30 +++++++++++++++++++++ src/conf/domain_conf.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++- src/conf/domain_conf.h | 8 ++++++ src/qemu/qemu_conf.c | 9 ++++++ 4 files changed, 111 insertions(+), 1 deletions(-) diff --git a/docs/schemas/domain.rng b/docs/schemas/domain.rng index f9d6d7e..8aa2079 100644 --- a/docs/schemas/domain.rng +++ b/docs/schemas/domain.rng @@ -746,6 +746,36 @@ </group> <group> <attribute name="type"> + <value>spice</value> + </attribute> + <optional> + <attribute name="port"> + <ref name="PortNumber"/> + </attribute> + </optional> + <optional> + <attribute name="tlsPort"> + <ref name="PortNumber"/> + </attribute> + </optional> + <optional> + <attribute name="listen"> + <ref name="addrIP"/> + </attribute> + </optional> + <optional> + <attribute name="passwd"> + <text/> + </attribute> + </optional> + <optional> + <attribute name="keymap"> + <text/> + </attribute> + </optional> + </group> + <group> + <attribute name="type"> <value>rdp</value> </attribute> <optional> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 4930c38..ca5dfc3 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -165,7 +165,8 @@ VIR_ENUM_IMPL(virDomainGraphics, VIR_DOMAIN_GRAPHICS_TYPE_LAST, "sdl", "vnc", "rdp", - "desktop") + "desktop", + "spice") VIR_ENUM_IMPL(virDomainHostdevMode, VIR_DOMAIN_HOSTDEV_MODE_LAST, "subsystem", @@ -267,6 +268,12 @@ void virDomainGraphicsDefFree(virDomainGraphicsDefPtr def) case VIR_DOMAIN_GRAPHICS_TYPE_DESKTOP: VIR_FREE(def->data.desktop.display); break; + + case VIR_DOMAIN_GRAPHICS_TYPE_SPICE: + VIR_FREE(def->data.spice.listenAddr); + VIR_FREE(def->data.spice.keymap); + VIR_FREE(def->data.spice.passwd); + break; } VIR_FREE(def); @@ -1692,6 +1699,38 @@ virDomainGraphicsDefParseXML(virConnectPtr conn, def->data.desktop.fullscreen = 0; def->data.desktop.display = virXMLPropString(node, "display"); + } else if (def->type == VIR_DOMAIN_GRAPHICS_TYPE_SPICE) { + char *port = virXMLPropString(node, "port"); + char *tlsPort; + + if (port) { + if (virStrToLong_i(port, NULL, 10, &def->data.spice.port) < 0) { + virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("cannot parse spice port %s"), port); + VIR_FREE(port); + goto error; + } + VIR_FREE(port); + } else { + def->data.spice.port = 5900; + } + + tlsPort = virXMLPropString(node, "tlsPort"); + if (tlsPort) { + if (virStrToLong_i(tlsPort, NULL, 10, &def->data.spice.tlsPort) < 0) { + virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("cannot parse spice tlsPort %s"), tlsPort); + VIR_FREE(tlsPort); + goto error; + } + VIR_FREE(tlsPort); + } else { + def->data.spice.tlsPort = 0; + } + + def->data.spice.listenAddr = virXMLPropString(node, "listen"); + def->data.spice.passwd = virXMLPropString(node, "passwd"); + def->data.spice.keymap = virXMLPropString(node, "keymap"); } cleanup: @@ -4100,6 +4139,30 @@ virDomainGraphicsDefFormat(virConnectPtr conn, break; + case VIR_DOMAIN_GRAPHICS_TYPE_SPICE: + if (def->data.spice.port) + virBufferVSprintf(buf, " port='%d'", + def->data.spice.port); + + if (def->data.spice.tlsPort) + virBufferVSprintf(buf, " tlsPort='%d'", + def->data.spice.tlsPort); + + if (def->data.spice.listenAddr) + virBufferVSprintf(buf, " listen='%s'", + def->data.spice.listenAddr); + + if (def->data.spice.keymap) + virBufferEscapeString(buf, " keymap='%s'", + def->data.spice.keymap); + + if (def->data.spice.passwd && + (flags & VIR_DOMAIN_XML_SECURE)) + virBufferEscapeString(buf, " passwd='%s'", + def->data.spice.passwd); + + break; + } virBufferAddLit(buf, "/>\n"); diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 7ea1152..4cb10d3 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -334,6 +334,7 @@ enum virDomainGraphicsType { VIR_DOMAIN_GRAPHICS_TYPE_VNC, VIR_DOMAIN_GRAPHICS_TYPE_RDP, VIR_DOMAIN_GRAPHICS_TYPE_DESKTOP, + VIR_DOMAIN_GRAPHICS_TYPE_SPICE, VIR_DOMAIN_GRAPHICS_TYPE_LAST, }; @@ -366,6 +367,13 @@ struct _virDomainGraphicsDef { char *display; int fullscreen : 1; } desktop; + struct { + int port; + int tlsPort; + char *listenAddr; + char *keymap; + char *passwd; + } spice; } data; }; diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 7ba0ac2..ae171bc 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -2067,6 +2067,12 @@ int qemudBuildCommandLine(virConnectPtr conn, } } + if (def->ngraphics > 1) { + qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, + "%s", _("only one graphics output is currently supported")); + goto error; + } + if ((def->ngraphics == 1) && def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC) { virBuffer opt = VIR_BUFFER_INITIALIZER; @@ -2155,6 +2161,9 @@ int qemudBuildCommandLine(virConnectPtr conn, */ ADD_ENV_COPY("QEMU_AUDIO_DRV"); ADD_ENV_COPY("SDL_AUDIODRIVER"); + } else if (def->ngraphics) { + qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, + "%s", _("unsupported graphics output requested")); } if (def->nvideos) { -- -- Name: Ben ------------------------------------------ Msn: liaosongwen(a)live.cn

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[libvirt-users] libvirt and Bridging
by Face 20 Aug '10

20 Aug '10

Hello all, Basically my problem is how can i access a virtual machine from local network. I am able to do so from the host PC put not from other PC's on the same network. here is my what i did so far (http://wiki.libvirt.org/page/Networking#NAT_forwarding_.28aka_.22virtual_ne…) cat '/etc/libvirt/qemu/networks/default.xml' <network> <name>default</name> <uuid>1bad08f7-0bc3-bfde-f87d-f323ab1c95eb</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on' delay='0' /> <ip address='10.0.2.1' netmask='255.255.255.240'> <dhcp> <range start='10.0.2.2' end='10.0.2.14' /> </dhcp> </ip> </network> cat '/etc/sysctl.conf' # Disable packet forwarding #net.ipv4.ip_forward=0 net.ipv4.ip_forward=1 # disable netfilter on the bridge: net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0 ifconfig -a br0 Link encap:Ethernet HWaddr 00:1C:C0:38:AF:BA inet addr:10.0.1.5 Bcast:10.0.1.15 Mask:255.255.255.240 inet6 addr: fe80::21c:c0ff:fe38:afba/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:580 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:29435 (28.7 Kb) TX bytes:468 (468.0 b) eth0 Link encap:Ethernet HWaddr 00:C0:DF:13:AF:87 inet addr:10.0.1.4 Bcast:10.0.1.15 Mask:255.255.255.240 inet6 addr: fe80::2c0:dfff:fe13:af87/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:476362 errors:0 dropped:0 overruns:0 frame:0 TX packets:684752 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:57147388 (54.4 Mb) TX bytes:707797829 (675.0 Mb) Interrupt:22 Base address:0x800 eth1 Link encap:Ethernet HWaddr 00:1C:C0:38:AF:BA inet6 addr: fe80::21c:c0ff:fe38:afba/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1142 errors:0 dropped:0 overruns:0 frame:0 TX packets:43 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:90530 (88.4 Kb) TX bytes:2632 (2.5 Kb) Memory:e3200000-e3220000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:118356 errors:0 dropped:0 overruns:0 frame:0 TX packets:118356 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:14239239 (13.5 Mb) TX bytes:14239239 (13.5 Mb) virbr0 Link encap:Ethernet HWaddr FE:54:00:45:A7:31 inet addr:10.0.2.1 Bcast:10.0.2.15 Mask:255.255.255.240 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:180 errors:0 dropped:0 overruns:0 frame:0 TX packets:128 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:16657 (16.2 Kb) TX bytes:50599 (49.4 Kb) vnet0 Link encap:Ethernet HWaddr FE:54:00:45:A7:31 inet6 addr: fe80::fc54:ff:fe45:a731/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:14 errors:0 dropped:0 overruns:0 frame:0 TX packets:357 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:1404 (1.3 Kb) TX bytes:19248 (18.7 Kb) brctl show bridge name bridge id STP enabled interfaces br0 8000.001cc038afba no eth1 virbr0 8000.fe540045a731 yes vnet0 route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.1.0 0.0.0.0 255.255.255.240 U 0 0 0 eth0 10.0.1.0 0.0.0.0 255.255.255.240 U 0 0 0 br0 10.0.2.0 0.0.0.0 255.255.255.240 U 0 0 0 virbr0 0.0.0.0 10.0.1.1 0.0.0.0 UG 0 0 0 eth0 iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT udp -- anywhere anywhere udp dpt:domain ACCEPT tcp -- anywhere anywhere tcp dpt:domain ACCEPT udp -- anywhere anywhere udp dpt:bootps ACCEPT tcp -- anywhere anywhere tcp dpt:bootps Chain FORWARD (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere 10.0.2.0/28 state RELATED,ESTABLISHED ACCEPT all -- 10.0.2.0/28 anywhere ACCEPT all -- anywhere anywhere REJECT all -- anywhere anywhere reject-with icmp-port-unreachable REJECT all -- anywhere anywhere reject-with icmp-port-unreachable ACCEPT all -- anywhere anywhere PHYSDEV match --physdev-is-bridged ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere 10.0.2.5 tcp dpt:smakynet ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere 10.0.2.5 tcp dpt:smakynet ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere 10.0.2.5 tcp dpt:smakynet Chain OUTPUT (policy ACCEPT) target prot opt source destination the IP Address for the virtual machine i am trying to access is 10.0.2.5 (vnet0). I am able only to access it from the host PC only, therefore, how i can i access it from other PC's on the network ? Any help would be much appreciated. -- Sincerely,

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[libvirt-users] how to load different bios into qemu
by Martin Kraus 17 Aug '10

17 Aug '10

Hello. I'm using debian squeeze with libvirt and kvm and I need to load a newer version of seabios into qemu. I'd like to do it without overwriting seabios in the debian package because that might be overwritten on the next update. I hopend that the <loader> directive in the config would work but it doesn't. thanks for any ideas. mk

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[libvirt-users] building libvirt-0.8.3 for windows ( with dlls )
by Gal Gafni 16 Aug '10

16 Aug '10

Hi, I'm trying to compile the latest libvirt (0.8.3 ) on windows and the configure fails to find XDR lib. I installed the xdr-4.0-mingw2 and configure complains the XDR library doesn't exist. Should I get another XDR lib? The command I run: $ ./configure --with-esx --without-sasl --without-avahi --without-polkit --without-python --without-xen --without-qemu --without-lxc --without-o penvz --without-libvirtd the last 10 lines of configure: checking for mntent.h... no checking net/ethernet.h usability... no checking net/ethernet.h presence... no checking for net/ethernet.h... no checking linux/magic.h usability... no checking linux/magic.h presence... no checking for linux/magic.h... no checking for xdrmem_create in -lportablexdr... no checking for library containing xdrmem_create... no configure: error: Cannot find a XDR library is there a a guide somewhere in the list for compiling the windows version on mingw? Thanks, Gal Gafni Chen CSL-WAVE Developer

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[libvirt-users] F13-x86_64 - New version of qemu in raw virt repo breaks virsh and virt-manager?
by Mike Hinz 16 Aug '10

16 Aug '10

Without actually thoroughly thinking about it, I updated my system yesterday with the latest qemu-kvm. rpm -qa shows qemu-kvm-0.13.0-0.5.20100809git25fdf4a.fc13.x86_64 See also: virsh # version Compiled against library: libvir 0.8.2 Using library: libvir 0.8.2 Using API: QEMU 0.8.2 Running hypervisor: QEMU 0.13.50 Now when I attempt to start a domain that was working perfectly well prior to this update, I get the following: virsh # start winxp1 error: Failed to start domain winxp1 error: internal error Process exited while reading console log output: Supported machines are: pc Standard PC (alias of pc-0.13) pc-0.13 Standard PC (default) pc-0.12 Standard PC pc-0.11 Standard PC, qemu 0.11 pc-0.10 Standard PC, qemu 0.10 isapc ISA-only PC Virt-Manager throws the same error when attempt to start an existing domain. I'm assuming that there's now some sort of compatibility issue between the current versions of libvirt/virt-manager and qemu-kvm? Is there a way to get around this and somehow use my existing domains with this updated version of qemu-kvm? Interestingly, just out of curiosity, I've started a new installation of a WinXP vm. This seems to be going perfectly well so far, so I assume that the issue is only with domains previously created with the older version of qemu?? Any assistance in being able to run my existing domains would be greatly appreciated! -- Regards, Mike Hinz President YR20 1718 Fry Road Suite 440 Houston, TX 77084 mike.hinz(a)yr20.com 832-225-1293 (o) 713-594-3095 (m) 832-550-2657 (f)

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[libvirt-users] cpuTimes and qemu-kvm on F13
by Matthew Farrellee 15 Aug '10

15 Aug '10

http://libvirt.org/html/libvirt-libvirt.html#virDomainInfo http://libvirt.org/html/libvirt-libvirt.html#virVcpuInfo Both virDomainInfo and virVcpuInfo have a nanosecond cpuTime field. How do the two related to one another? With some experiementing, it appears the virDomainInfo::cpuTime is equal to the host CPU time used by the qemu-kvm process for the domain. It also appears that the sum(virVcpuInfo::cpuTime) for a domain is not equal to the virDomainInfo::cpuTime. Is the virVcpuInfo::cpuTime how much host CPU time was spent simulating the vCPU? Making the difference between the sum and the virDomainInfo::cpuTime the overhead of qemu-kvm? Does the relationship hold for other hypervisors? Best, matt

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[libvirt-users] virtio and encryption
by Mike Ponomarenko 13 Aug '10

13 Aug '10

Greetings, I am trying to use virtio and encryption. My setup is: host and guest: ubuntu 10.04 server (libvirt 0.7.5-5ubuntu27, qemu-kvm 0.12.3+noroms-0ubuntu9.2) I have secret defined and disk in domain xml referencing that secret. When I start using "<target dev='hda' bus='ide'/>" in HDD config, it works. When I start using "<target dev='vda' bus='virtio'/>" I get following in syslog: qemuMonitorCommandWithHandler:240 : cannot send monitor command 'cont': Unknown error 8446744073709551594 running with "<target dev='vda' bus='virtio'/>" works fine if format is raw and there is no encryption. Is storing raw images on encrypted loop device the only way to have both virtio and ecryption?

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[libvirt-users] how to make consisten backups of guests without stopping them?
by Martin Kraus 12 Aug '10

12 Aug '10

Hello. I'd like to backup kvm guests running from lvm partitions on the host without as little downtime as possible, preferably without stopping them. Could libvirt help me with this? Could anybody point me to some documentation? The question is what happens to the filesystem if I snapshot it from the host. LVM is supposed to tell the filesystem to make itself consistent but I don't know how that works if the filesystem is mounted inside the guest. thanks mk

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[libvirt-users] RHEL 6 does not support bonded and vlan tagged interfaces for KVM guests?
by David Knierim 12 Aug '10

12 Aug '10

I just wrote a bugzilla report against RHEL 6 beta2 (https://bugzilla.redhat.com/show_bug.cgi?id=623199) In it I documented that I cannot get my guests to be able to use our standard network configuration, which is active-standby bonded interface with tagged vlans. The response I got was this: RHEL Product and Program Management 2010-08-11 11:39:02 EDT This issue has been proposed when we are only considering blocker issues in the current Red Hat Enterprise Linux release. ** If you would still like this issue considered for the current release, ask your support representative to file as a blocker on your behalf. Otherwise ask that it be considered for the next Red Hat Enterprise Linux release. ** While I am working with Red Hat to get this included in the official release of RHEL 6, I was hoping that I could get this working somehow. It appears to me that the problem is in the libvert-controlled network connection to the guest. Can someone give me a clue on how to get this working? Thanks, David

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[libvirt-users] libvirt 0.8.3 cannot connect to remote libvirtd 0.6.3
by Haidong Zhu 11 Aug '10

11 Aug '10

It seems virsh 0.8.3 cannot connect to libvirtd 0.6.3. Machine 1: iibvirtd is 0.6.3 Machine 2: virsh 0.6.1 virsh -c xen+ssh://root@192.168.1.78 list Connecting to uri: qemu:///session Id Name State ---------------------------------- 0 Domain-0 running 1 shanxi idle Machine 3: virsh 0.8.3 virsh -c xen+ssh://root@192.168.1.78 list error: server closed connection: error: failed to connect to the hypervisor

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[libvirt-users] TCP reset (RST) networking issue (maybe was 'Sporadic network issues")
by Brian Fallik 11 Aug '10

11 Aug '10

Hi, I'm seeing a very similar problem to the thread "Sporadic networking issues" [1]. In our setup, some TCP operations receive unexpected RST packets when executed on the guest. I can see these RST packets via wireshark but can't explain their source. We originally uncovered this when some 'git clone' operations failed with "Broken Pipe" in the guests. I've been able to reproduce the same failures using scp and 'svn checkout'. The failure occurs 80-90% of the time and 'svn checkout' seems to be the quickest to fail. The same operations on the host are always successful. My setup is a Lucid amd64 host with two guests (Lucid and Hardy, both i386, using kvm). Networking is configured as described in "Routed network config". One anomoly I notice is that our configuration is missing the 'mode' and 'dev' attributes of the 'forward' node. Not sure if that makes a difference, especially since networking seems to mostly work. I've tried this with both virtio and e1000 drivers with no difference. I tried Jeremy's suggestion to limit the host to start a single guest but that did not seem to have an impact. One thing I wonder is if I'm resetting the libvirt correctly to make this change. I did not reboot the host, but I did shutdown the guests, shutdown the default network, verified that no kvm was running and no tap/bridge devices existed, undefined the Hardy domain, then restarted the default network and started the Lucid kvm. Does that sound correct? Anyone have suggestions for further debugging or pointer(s) to existing related bugs? My search didn't turn up anything obvious. I'm very eager to resolve this issue since it's blocking our ability to use the VMs. Thanks, brian 1 - https://www.redhat.com/archives/libvirt-users/2010-August/msg00012.html

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[libvirt-users] renaming a domain?
by Igor Serebryany 10 Aug '10

10 Aug '10

Hi, I'm trying to figure out if libvirt supports a domain rename feature, like xen's "xm rename" command. I couldn't find anything in the docs suggesting such a function. Am I missing something? Thanks! --Igor

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[libvirt-users] Sporadic network issues
by jeremy avnet 10 Aug '10

10 Aug '10

I'm seeing this problem with both the virtio and e1000 driver with both linux and windows guests. About 5 - 10% of the VMs I launch have network problems. They seem to always get an IP from the DHCP server (dnsmasq), but afterwards either they can not make an outside network connection or they lose connectivity at a later time. Sometimes the connectivity comes back, sometimes it doesn't. It's very sporadic and there doesn't seem to be any rhyme or reason to it. The network is configured like "Routed network config" described here: http://libvirt.org/formatnetwork.html#examplesRoute The host machines are on Ubuntu 10.04. We were using the default Lucid packages (libvirt 0.7.5 / qemu 0.12.3), but I have upgraded us to libvirt 0.8.1 and qemu 0.12.4. I believe this has helped reduce the failure rate, but it still persists. Has anyone else had this problem or is there some suggestions for things to look into? Thank you. .:. jeremy

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[libvirt-users] 0.8.3 make error
by Haidong Zhu 10 Aug '10

10 Aug '10

OS: Ubuntu 9.04 Error output: CC libvirt_parthelper-parthelper.o CCLD libvirt_parthelper libvirt_parthelper-parthelper.o: In function `main': /home/yoyoadm/libvirt-0.8.3/src/storage/parthelper.c:105: undefined reference to `ped_device_get' /home/yoyoadm/libvirt-0.8.3/src/storage/parthelper.c:119: undefined reference to `ped_disk_new' /home/yoyoadm/libvirt-0.8.3/src/storage/parthelper.c:125: undefined reference to `ped_disk_next_partition' collect2: ld returned 1 exit status make[3]: *** [libvirt_parthelper] Error 1 make[3]: Leaving directory `/home/yoyoadm/libvirt-0.8.3/src' make[2]: *** [all] Error 2 make[2]: Leaving directory `/home/yoyoadm/libvirt-0.8.3/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/yoyoadm/libvirt-0.8.3' make: *** [all] Error 2

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[libvirt-users] howto setup linux guest with 2 nics
by Jan Paulini 06 Aug '10

06 Aug '10

hi, i have the following situation. my host system is running debian lenny and kvm. i have 2 ethernet interfaces of which i like to use eth0 for administration of the server itself without traffic from any guest systems. eth1 is connected to a different switch where i have numerous vlans. i have successfully setup a guest running virt-install using a bridge interface on the host system. here the debian config for br1 which i used: auto eth1.700 iface eth1.700 inet manual auto br1 iface br1 inet manual bridge_ports eth1.700 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off i was now looking into the xml file for the guest hoping to find a way to use 2 ethernet interfaces for the guest one on br1 and another on br2 where br2 would be configures as br1 above on the host, just in a different vlan. how can i do that ? the network section of the xml fine lookes like this: <interface type='bridge'> <mac address='54:52:00:xx:xx:xx'/> <source bridge='br1'/> <model type='virtio'/> </interface> is there possibly a way of installing a guest with virt-install to give the guest eth0 and eth1 which are in different vlans on the hosts eth1 ? thanks for your help ! Jan

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[libvirt-users] How to force the use of virtio as the guest network driver
by Tony Lewis 06 Aug '10

06 Aug '10

I'm running KVM on a standard Debian Lenny host, and I seem to be hitting the problem identified here: http://serverfault.com/questions/123566/is-anyone-using-kvm-in-production My symptom is that using rsync over SSH to transfer files into the guest gets slower and slower, and then grinds to a halt, and the machine becomes unreachable. It seems that I should be using the virtio driver, but I can't seem to make it load. The KVM guest has the virtio module, (a la find /lib/modules -name \*virtio\*) but when I try to force it by setting <model type="virtio"/> in the XML configuration, it seems to make no difference. I see that as per http://libvirt.org/formatdomain.html , "qemu -net nic,model=? /dev/null" returns the following: "ne2k_isa i82551 i82557b i82559er ne2k_pci pcnet rtl8139", but I have no qemu-kvm binary. Not sure if that's a telling symptom or not. Host kernel is 2.6.26-2-openvz-amd64, KVM version is 72+dfsg-5~lenny5, libvirt version is 0.4.6-10, all of which look good enough to use virtio according to http://wiki.libvirt.org/page/Virtio . Thanks, Tony Lewis

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[libvirt-users] performance with libvirt and kvm
by Nirmal Guhan 04 Aug '10

04 Aug '10

Hi, I am seeing a performance degradation while using libvirt to start my vm (kvm). vm is fedora 12 and host is also fedora 12, both with 2.6.32.10-90.fc12.i686. Here are the statistics from iperf : >From VM: [ 3] 0.0-30.0 sec 199 MBytes 55.7 Mbits/sec >From host : [ 3] 0.0-30.0 sec 331 MBytes 92.6 Mbits/sec libvirt command as seen from ps output : /usr/bin/qemu-kvm -S -M pc-0.11 -enable-kvm -m 512 -smp 1 -name f12kvm1 -uuid 9300bfe2-2b9c-d9f0-3b03-9c7fe9934393 -monitor unix:/var/lib/libvirt/qemu/f12kvm1.monitor,server,nowait -boot c -drive file=/var/lib/libvirt/f12.img,if=ide,bus=0,unit=0,boot=on,format=raw -drive if=ide,media=cdrom,bus=1,unit=0,format=raw -net nic,macaddr=52:54:00:51:7c:39,vlan=0,model=virtio,name=net0 -net tap,fd=21,vlan=0,name=hostnet0 -serial pty -parallel none -usb -vnc 127.0.0.1:0 -k en-us -vga cirrus -balloon virtio If I start a similar vm using qemu-kvm directly, the performance matches with the host. qemu kvm : [ 3] 0.0-30.0 sec 329 MBytes 91.9 Mbits/sec TCP window size is 64K for all the cases. Command used : qemu-kvm vdisk.img -m 512 -net nic,model=virtio macaddr=$macaddress -net tap,script=/etc/qemu-ifup Any clues? Thanks, Nirmal

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[libvirt-users] libvirt and lxc
by Nirmal Guhan 04 Aug '10

04 Aug '10

Is anyone using libvirt for lxc ? I am trying to do so and running into an issue. The system container starts fine with lxc tools and am able to connect to it. Here is the snippet of my xml file (rest is same as in http://libvirt.org/drvlxc.html) <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/lxc/f12'/> <target dir='/'/> </filesystem> <interface type='bridge'> <mac address='52:54:00:82:87:64'/> <source bridge='br0'/> <target dev='tap0'/> </interface> <console type='pty'> <target port='0'/> </console> </devices> Am able to start the container but when I do console : virsh # console f12lxc Connected to domain f12lxc Escape character is ^] <<hangs here and I press enter, it destroys the domain>> virsh # Am running Fedora 12 with 2.6.32.10-90.fc12.i686. I changed target dev='tap0' to 'veth' and no change in the behavior. Please help. Thanks, Nirmal

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