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[libvirt-users] DBus API for libvirt
by sbaugh＠catern.com 13 Apr '16

13 Apr '16

Hello, For a variety of reasons I am interested in a D-Bus interface for libvirt. Primarily for use with http://cockpit-project.org/ for which it would be very easy to write a web interface for libvirt, given a D-Bus interface for libvirt, but writing using the raw libvirt RPC protocol would require writing a new Javascript library for parsing/encoding that protocol. But there are other nice features of a D-Bus interface for libvirt, too. Does a D-Bus interface for libvirt exist? Thanks!

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[libvirt-users] Clone VM with saved state
by Michael Ravits 13 Apr '16

13 Apr '16

Hi, My use case involves creating duplicates of saved virtual machines. Tried with virt-manager and with virsh but so far it seems like this case is not supported by these tools. Does anyone know how I could achieve the above? Thanks, Michael

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Re: [libvirt-users] [Bug 1325687] network type="ethernet" not supported with LXC
by abhishek jain 13 Apr '16

13 Apr '16

Hi Team I'm trying to launch LXC VM with libvirt 1.2.12 having commit *22cff52a2b8e06c913b1f97767e5d3**90fb17fc3b *with below XML configuration.. <domain type="lxc"> <uuid>64c48da2-e318-4085-8b88-c980aab4de34</uuid> <name>test</name> <memory>524288</memory> <vcpu>1</vcpu> <os> <type machine="virt">exe</type> <cmdline>root=/dev/ram0 rw console=ttyAMA0 rootwait earlyprintk</cmdline> <init>/bin/sh</init> </os> <clock offset="utc"/> <devices> <file/> <interface type='ethernet'> <mac address='02:74:ff:9d:52:f5'/> <script path=''/> <target dev='tap74f2-f5'/> </interface> <console type="pty"/> </devices> </domain> I'm getting following errors while launching LXC VM using above XML file.. virsh -c lxc: define lxc.xml virsh -c lxc: start test error: Failed to start domain test error: internal error: guest failed to start: /usr/lib/libvirt/libvirt_lxc: option '--veth' requires an argument syntax: /usr/lib/libvirt/libvirt_lxc [OPTIONS] Options -b, --background -n NAME, --name NAME -c FD, --console FD -v VETH, --veth VETH -s FD, --handshakefd FD -S NAME, --security NAME -h, --help Unknown failure in libvirt_lxc startup Please help me regarding this. --Thanks Abhishek Jain On Mon, Apr 11, 2016 at 3:35 AM, <bugzilla(a)redhat.com> wrote: > https://bugzilla.redhat.com/show_bug.cgi?id=1325687 > > Cole Robinson <crobinso(a)redhat.com> changed: > > What |Removed |Added > > ---------------------------------------------------------------------------- > Status|NEW |CLOSED > CC| |crobinso(a)redhat.com > Resolution|--- |CURRENTRELEASE > Last Closed| |2016-04-10 18:05:06 > > > > --- Comment #1 from Cole Robinson <crobinso(a)redhat.com> --- > ethernet support was actually enabled for lxc via this commit: > > commit 22cff52a2b8e06c913b1f97767e5d390fb17fc3b > Author: Anirban Chakraborty <abchak(a)juniper.net> > Date: Tue Nov 18 15:55:48 2014 -0800 > > network: Add network bandwidth support to ethernet interfaces > > > Which looks like libvirt v1.2.10 or v1.2.11 > > -- > You are receiving this mail because: > You are on the CC list for the bug. > You reported the bug.

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[libvirt-users] CentOS 6 and 1.3.3
by Brian Rak 12 Apr '16

12 Apr '16

libvirt 1.3.3 seems to have introduced some kind of issue on CentOS 6 (no systemd). After upgrading, libvirt would take an incredibly long time to get to a state where it would actually respond to a simple 'virsh list' command. Looking at verbose output showed this repeating at exactly 30s intervals 2016-04-12 19:40:57.142+0000: 14929: info : virEventPollDispatchHandles:507 : EVENT_POLL_DISPATCH_HANDLE: watch=1 events=1 2016-04-12 19:40:57.142+0000: 14929: info : virEventPollRunOnce:641 : EVENT_POLL_RUN: nhandles=116 timeout=-1 2016-04-12 19:40:57.143+0000: 15223: info : virObjectRef:296 : OBJECT_REF: obj=0x7fb944181bc0 2016-04-12 19:40:57.144+0000: 15223: info : virObjectUnref:259 : OBJECT_UNREF: obj=0x7fb944181bc0 2016-04-12 19:40:57.157+0000: 15223: info : virObjectUnref:259 : OBJECT_UNREF: obj=0x7fb944253020 2016-04-12 19:40:57.157+0000: 15223: info : virObjectUnref:259 : OBJECT_UNREF: obj=0x7fb944309450 2016-04-12 19:40:57.157+0000: 15223: info : virObjectUnref:259 : OBJECT_UNREF: obj=0x7fb94400ca90 2016-04-12 19:41:27.147+0000: 15224: info : virDBusCall:1577 : DBUS_METHOD_REPLY: 'org.freedesktop.DBus.ListActivatableNames' on '/org/freedesktop/DBus' at 'org.freedesktop.DBus' 2016-04-12 19:41:27.148+0000: 15224: info : virObjectUnref:259 : OBJECT_UNREF: obj=0x7fb94400ca90 2016-04-12 19:41:27.148+0000: 15224: info : virObjectRef:296 : OBJECT_REF: obj=0x7fb94400ca90 2016-04-12 19:41:27.148+0000: 15224: info : virObjectUnref:259 : OBJECT_UNREF: obj=0x7fb94400ca90 2016-04-12 19:41:27.148+0000: 15224: info : virObjectRef:296 : OBJECT_REF: obj=0x7fb94400ca90 2016-04-12 19:41:27.151+0000: 15224: info : virObjectUnref:259 : OBJECT_UNREF: obj=0x7fb94400ca90 2016-04-12 19:41:27.151+0000: 15224: info : virObjectRef:296 : OBJECT_REF: obj=0x7fb860000e30 2016-04-12 19:41:27.151+0000: 15224: info : virEventPollUpdateHandle:152 : EVENT_POLL_UPDATE_HANDLE: watch=58 events=15 2016-04-12 19:41:27.151+0000: 15224: info : qemuMonitorSend:1005 : QEMU_MONITOR_SEND_MSG: mon=0x7fb860000e30 msg={"execute":"query-status","id":"libvirt-7"} fd=-1 Looking at the dbus src, there's a 30s timeout defined here: src/util/virdbus.c:# define VIR_DBUS_METHOD_CALL_TIMEOUT_MILLIS 30 * 1000 So, for some reason libvirt is trying to call a dbus method before every KVM instance start. This leads to absurdly long startup times. This behavior was not present in 1.3.1. My workaround was to just recompile with '--with-firewalld=no --with-dbus=no', which seems to have worked. There's not really anything useful for libvirt to be talking to via dbus (in our environment), so no big loss there.

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[libvirt-users] add external access to routed dnsmasq
by Jeff 11 Apr '16

11 Apr '16

I have created a routed virtual network. From within the routed net, DNS requests to the dnsmasq interface virbr2 work fine. On the libvirt host, DNS requests to the dnsmasq interface virbr2 work fine. I would like to allow external hosts, on the same network as the libvirt host, to query the dnsmasq interface. However external DNS queries to the virbr2 interface time out. The iptables firewall for this interface and port look clear. question: How to enable external dns queries to my routed virtual network? my config: dnsmasq-2.66-14.el7_1.x86_64 libvirt-1.2.17-13.el7_2.3.x86_64 thanks, Jeff

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[libvirt-users] Duplicate ID 'pci' for device
by Nerijus Baliunas 11 Apr '16

11 Apr '16

Hello, I use fedora-virt-preview repo and it recently updated to qemu-2.6.0-0.1.rc1.fc23.x86_64 and libvirt-1.3.3-1.fc23.x86_64. Now my arm VM does not start: Error starting domain: internal error: process exited while connecting to monitor: qemu-system-arm: -device pci-bridge,chassis_nr=2,id=pci,bus=pci,addr=0x1: Duplicate ID 'pci' for device I uploaded VM xml file to http://paste.fedoraproject.org/353914/46037204 Regards, Nerijus

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[libvirt-users] virsh dump
by Leekitty 11 Apr '16

11 Apr '16

Hi I want to use “virsh dump ”to only get the memory of a domain,but I do not know the image format 。 Questions: How can I get the memory by using “virsh dump” Wen Lee

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[libvirt-users] create a network such as default network
by Mohsen Pahlevanzadeh 10 Apr '16

10 Apr '16

Dear All, When user uses `virsh net-define xmlfile` , User only define an xml file in `/etc/libvirt/qemu/networks`. I created an uuid and another bridge in related xml file. But I need to create the following files for my network: `default.addnhosts default.conf default.hostsfile virbr0.status` Question is , can I create them via cmd? --Best regards mohsen

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[libvirt-users] libvirtd vs XDG_RUNTIME_DIR
by Lars Kellogg-Stedman 09 Apr '16

09 Apr '16

I ran into an odd problem today. I wanted to share it here in the hopes of maybe saving someone else some lost time. When you run libvirtd as an unprivileged user (e.g., if you target qemu:///session from a non-root account), then libvirt will open a unix domain socket in one of two places: - If XDG_RUNTIME_DIR is defined, then inside $XDG_RUNTIME_DIR/libvirt/libvirt-sock - If XDG_RUNTIME_DIR is *not* defined, then inside $HOME/.cache/libvirt/libvirt-sock With a CentOS 7 system, at least, if you ssh directly into an account, XDG_RUNTIME_DIR is set. But! If you `su -` to the account from root, e.g: # su - stack Then XDG_RUNTIME_DIR is *not* set. The problem is a little subtle, because most operations you will perform will work just fine in both cases: you can query for defined but not active guests, storagep pools, volumes, and so forth without a problem and you'll get the same answer. The problem crops up when you start a guest, which results in a persistent libvirtd process. Now, depending on how you got to your account, you will either (a) talk to the persistent process, and you'll be able to see the running guests, or (b) you'll end up spawning a new ephemeral libvirtd process listening in the *other* location, and you won't see anything, and you will wonder why there is a qemu process running for your guest but it's not showing up in "virsh list" and what the heck is going on here. I don't know if there's a good solution to this, but the failure mode is really non-obvious. Cheers, -- Lars Kellogg-Stedman <lars(a)redhat.com> | larsks @ {freenode,twitter,github} Cloud Engineering / OpenStack | http://blog.oddbit.com/

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[libvirt-users] (no subject)
by nidhi d 07 Apr '16

07 Apr '16

How is tunnelled option specified during migratiion different than an ordinary ssh connection specified as:- virsh migrate vmName qemu+ssh://user@remotesys/system?

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