- Users - libvirt List Archives

Re: [libvirt-users] [libvirt] libvirt 1.2.10 and latest EL6 qemu-kvm
by Kashyap Chamarthy 20 Jan '15

20 Jan '15

[Dropping libvir list and adding libvir-users list.] On Mon, Jan 19, 2015 at 04:12:46PM +0100, liedekef(a)telenet.be wrote: > Hi all, > > I had libvirt 1.2.10 running without issues together with the qemu package > qemu-kvm-0.12.1.2-2.415.el6_5.14.x86_64.rpm That's a really old QEMU and the libvirt you're using is relatively newer. > Now, after updating my server, qemu-kvm became version > qemu-kvm-0.12.1.2-2.448.el6_6.x86_64 > > And as a result, when doing 'virsh start' (virsh define worked ok), the following error occured: > > 2015-01-19 15:05:26.539+0000: 4347: error : qemuMonitorJSONCheckError:379 : internal error: unable to execute QEMU command 'qom-list': The command qom-list has not been You seem to be hitting this bug (although the bug is for RHEL7, looks like the same behavior): https://bugzilla.redhat.com/show_bug.cgi?id=1082124 Where Michal Privoznik says, it should already be fixed with these commits in libvirt: 730af8f2cd7bc0e4c98b97200857909f42ea817f -- qemuMonitorJSONGetCPUx86Data: Don't fail on ancient qemus 84f69602143551433e3e0a5226dc572ecb33c059 -- qemu: Check for presence of device and properities when getting CPUID a6a6f84af92a506f83fdecf56f292bcb89905492 -- qemu: Change return type of qemuMonitorGetGuestCPU() > > The only thing I could do (even downgrading libvirt to 1.2.9 didn't > work), was to downgrade qemu-kvm to the older version again ... Any > hints on this? For the EL distrubtione you're using, I think using whatever the newest supported combination of libvirt and QEMU should help. -- /kashyap

2 2

[libvirt-users] Guests using more ram than specified
by Dennis Jacobfeuerborn 19 Jan '15

19 Jan '15

Hi, today I noticed that one of my HVs started swapping aggressively and noticed that the two guests running on it use quite a bit more ram than I assigned to them. They respectively were assigned 124G and 60G with the idea that the 192G system then has 8G for other purposes. In top I see the VMs using about 128G and 64G which means there is nothing left for the system. This is on a CentOS 7 system. Any ideas what causes this or how I can calculate the actual maximum amount of RAM I can assign to the guests on a HV without overcommitting RAM? Regards, Dennis

3 3

[libvirt-users] volume can't be attached after libvirt upgrade
by Chengyuan Li 19 Jan '15

19 Jan '15

Hi, My nova-compute nodes was running libvirt 0.9.13 and QEMU 1.0, after libvirt was upgraded to 1.2.2, the VMs launched by libvirt 0.9.13 can't attach volume any more, i.e. "nova volume-attach <vm-uuid> <volume-uuid>" doesn't work. But before the libvirt upgrade, the same VM can attach volume disk. I did some debuging and find that, it failed in QEMU when try to open the volume device, and the return errno is EPERM. QEMU instances is running as user libvirt-qemu always, so is that possible some problem in Linux capabilites or libvirt apparmor? ------------------------------------- int qemu_open(const char *name, int flags, ...) { int ret; int mode = 0; long euid, egid; if (flags & O_CREAT) { va_list ap; va_start(ap, flags); mode = va_arg(ap, int); va_end(ap); } euid = (long)geteuid(); egid = (long)getegid(); #ifdef O_CLOEXEC ret = open(name, flags | O_CLOEXEC, mode); #else ret = open(name, flags, mode); if (ret >= 0) { qemu_set_cloexec(ret); } #endif return ret; } Regards, CY.

1 1

[libvirt-users] Suggest to update python binding information on libvirt.org
by Lingyu Zhu 19 Jan '15

19 Jan '15

Hello. I am new libvirt user. I downloaded and compile the source code with default configuration. I had a lot of trouble before finally found out that python bindings is now a separated package. However the web site still states that python binding is directly supported, and that install extra binding package when libvirt is installed as a binary package. Please consider updating this misleading information. Regards Lingyu Zhu

2 3

[libvirt-users] [libvirt]configuration question about usinf for [xen4.5][libxl]
by Doug McMillan 17 Jan '15

17 Jan '15

What configuration should be set in a custom compiled libvirt to get the most out of the xen libxl? [ -f Makefile ] || ./configure --prefix=/usr --libexec=/usr/lib/"$pkgname" --sbindir=/usr/bin \ --with-storage-lvm=yes --with-udev=yes --without-hal --disable-static \ --with-init-script=systemd --with-systemctl=yes --with-systemd-daemon=yes \ --with-qemu-user=nobody --with-qemu-group=nobody \ --without-netcf --with-interface --with-lxc --with-storage-iscsi \ --with-xen=yes --with-libxl=yes # --with-audit After compiling what needs done to configure libvirt to work with xen libxl because all I seem to be getting is: error: failed to connect to the hypervisorerror: no connection driver available for //libxl[dragon@archxen ~]$

1 0

[libvirt-users] polkit ACL for remotely changing a spice console password
by David Mansfield 16 Jan '15

16 Jan '15

I'm working on some infrastructure which allows a remote password reset (with expiry) of a spice console running on a remote libvirtd/qemu-kvm. I currently have GSSAPI over tcp working and can set the password - but I can also do everything else - the default policy is still in place, and once authenticated, anything goes. I'm setting the password using a command like this: virsh --connect qemu+tcp://remote.example.org/system qemu-monitor-command --hmp mydomain 'set_password spice mynewpassword123 disconnect' I've looked at the documentation for ACLs but I can't see anything that covers qemu-monitor-command, and specifically "set_password". The other way to set passwords is to update the domain settings using an XML fragment, but I'm not clear on the exact semantics on how to do that (do you have to extract the xml fragment first?) AND I can't find how that's covered in ACL documentation either. Some idea? Any pointers would be much appreciated. Ideally, I'd like to say "user x can update password for domain y" and that's the only thing that can be modified for that user. -- Thanks, David Mansfield Cobite, INC.

2 1

[libvirt-users] How do you force a VM reboot (when its KPd etc) without interrupting a blockcopy?
by Scott Sullivan 16 Jan '15

16 Jan '15

My question is this: If you have an ongoing blockcopy (drive-mirror) of a running transient VM, and the VM kernel panics, can you restart the VM without interrupting the ongoing blockcopy? A virsh reboot won't work since if the VM is kernel panicked, its not going to respond to ACPI requests.

3 3

[libvirt-users] Discard disk changes on shutdown
by Jason Macgowan 16 Jan '15

16 Jan '15

Hi Everyone, I'm trying to start a domain that will discard all changes to its disks on shutdown. I've tried adding <transient/> to the disk declarations in the definition xml but this results in a "not supported" error message on define. Is there a way to do this without creating and rolling back snapshots? Thanks, Jason

2 1

[libvirt-users] create 1000 vNICs and attach to them DOT1X profiles
by Ion Ermurachi 16 Jan '15

16 Jan '15

Hello Folks, I am looking for ideas on how to create 1000 DOT1X sessions generated from a Linux BOX. DOT1X is a name for EAP packets that travel in an Ethernet environment and is used to transport authentication information before a PC will get access to the network, it is based on RFC-3748. Having this in mind a virtual interface will need a MAC address and an eventually IP (I want to stress out that for EAP over LAN, DOT1X, there is need for L2 virtual interface). One DOT1X session can be easily generated using network manager (nmcli) on a physical NIC. For network manager this is a session that may include many parameters used to form the connection, in my case used for DOT1X authentication. I am looking for a solution on how to create 1000 DOT1X sessions/connections using Linux virtual interfaces and one physical NIC. An idea would be to use a virtual bridge and attach to it a physical interface. After that, create virtual interfaces that will be connected to the bridge. In this case the bridge will relay packets between physical and virtual interfaces. Looking on this alias I understood from Michal Privoznik that above is feasible. Questions 1.Is it possible to create virtual interfaces that will be further managed by the NETWORK MANAGER ? 2.What would be the exact steps and commands to generate these interfaces having fresh OS installed ? I have tried creating vNICs using "virsh" using bellow syntax but it will not start it and I am still not sure if in the end can be managed by the NETWORK MANAGER: virsh iface-define XML_LOCATION virsh iface-list ---> this will list interfaces created virsh iface-start INTERFACE_DEFINED_ABOVE Thanks in advance. Best Regards Ion Ermurachi

1 0

[libvirt-users] Resizing lvm fails with fedora20
by Alex Regan 15 Jan '15

15 Jan '15

Hi, I'm trying to resize a 15GB LVM root partition on a fedora20 server with a fedora20 guest and I'm having a problem. Is this supported on fedora20? I recall having a similar problem (maybe even exact same problem) all the way back in fedora16 or fedora17, but hoped/thought it would be fixed by now? # virt-df -h test1-011015.img Filesystem Size Used Available Use% test1-011015.img:/dev/prop/boot 476M 109M 338M 23% test1-011015.img:/dev/prop/root 14G 10G 3.3G 72% # truncate -s 50G newimg # virt-resize test1-011015.img newimg --expand /dev/sda1 --LV-expand /dev/prop/root Examining test1-011015.img ... virt-resize: libguestfs error: lvm_set_filter: vgchange -ay: /run/lvm/lvmetad.socket: connect failed: No such file or directory WARNING: Failed to connect to lvmetad: No such file or directory. Falling back to internal scanning. /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory Couldn't find device with uuid uA2ju5-EElD-xgB3-EE7J-gJ55-UnkY-Vq2l6H. /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory /run/lvm/lvmetad.socket: connect failed: No such file or directory Refusing activation of partial LV home. Use --partial to override. What are my alternatives for resizing a root partition on LVM? Thanks, Alex

2 2