February 2009 - Devel - libvirt List Archives

[libvirt] [PATCH] Better error reporting in qemu AttachDevice
by Cole Robinson 02 Mar '09

02 Mar '09

The attached patch fixes qemu AttachDevice to show the invalid disk bus or type in it's error messages. This also adds an error message where previously we could fall through, leading virsh to print 'Unknown Error' if attempting to hotplug an IDE disk. Thanks, Cole

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[libvirt] [PATCH] Recognize available media in nodedev hal driver
by Cole Robinson 02 Mar '09

02 Mar '09

The host device hal driver can't tell when a storage device has media available, the culprit being an incorrect return value check. The attached patch fixes this. Unfortunately the driver also doesn't properly detect media eject and media inserted hal events. I've been poking at this but it's a more involved fix. Thanks, Cole

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[libvirt] [PATCH] Mark defined networks as persistent
by Cole Robinson 02 Mar '09

02 Mar '09

We aren't setting the persistent bit when a network is defined, so 'destroy' makes them disappear (though they will reappear later since their persistent config is never removed). Attached patch fixes this. Thanks, Cole

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[libvirt] [PATCH] Don't validate disk type in virsh attach-disk
by Cole Robinson 02 Mar '09

02 Mar '09

virsh attempts to validate the requested disk type, rather than just let the underlying driver do it. This was erroneously denying floppy device attaches. Patch attached. Thanks, Cole

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[libvirt] [PATCH 0/6] Add device assignment related node device methods (v2)
by Mark McLoughlin 02 Mar '09

02 Mar '09

Hey, Okay, here's the patches again with the following changes: - Pass virConnectPtr to all pciDevice methods - Read the vendor/product ID from sysfs rather than supplying it to pciGetDevice() - Re-factor the Dettach/ReAttach() so that it can be more easily used with pciback - Add <hostdev managed='(yes|no)'> - Dettach and reset managed hostdev devices before starting a QEMU guest Cheers, Mark.

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[libvirt] PATCH: Fix DBus thread safety
by Daniel P. Berrange 02 Mar '09

02 Mar '09

We are using DBus from multiple threads in libvirtd. We are not calling dbus_threads_init_default(). Very bad things result. Happy-crashy-daemon This patch fixes that, and also stops DBus messing around with SIGPIPE and also stops it calling exit() when the bus disconnects, so we can actually see the error & continue with life. Daniel diff -rup libvirt-0.6.0.orig/qemud/qemud.c libvirt-0.6.0.new/qemud/qemud.c --- libvirt-0.6.0.orig/qemud/qemud.c 2009-02-18 10:56:34.000000000 +0000 +++ libvirt-0.6.0.new/qemud/qemud.c 2009-02-18 12:52:18.000000000 +0000 @@ -860,6 +860,10 @@ static struct qemud_server *qemudNetwork if (auth_unix_rw == REMOTE_AUTH_POLKIT || auth_unix_ro == REMOTE_AUTH_POLKIT) { DBusError derr; + + dbus_connection_set_change_sigpipe(FALSE); + dbus_threads_init_default(); + dbus_error_init(&derr); server->sysbus = dbus_bus_get(DBUS_BUS_SYSTEM, &derr); if (!(server->sysbus)) { @@ -868,6 +872,7 @@ static struct qemud_server *qemudNetwork dbus_error_free(&derr); goto cleanup; } + dbus_connection_set_exit_on_disconnect(server->sysbus, FALSE); } #endif diff -rup libvirt-0.6.0.orig/src/node_device_hal.c libvirt-0.6.0.new/src/node_device_hal.c --- libvirt-0.6.0.orig/src/node_device_hal.c 2009-01-16 12:44:22.000000000 +0000 +++ libvirt-0.6.0.new/src/node_device_hal.c 2009-02-18 12:52:48.000000000 +0000 @@ -685,6 +685,9 @@ static int halDeviceMonitorStartup(void) nodeDeviceLock(driverState); /* Allocate and initialize a new HAL context */ + dbus_connection_set_change_sigpipe(FALSE); + dbus_threads_init_default(); + dbus_error_init(&err); hal_ctx = libhal_ctx_new(); if (hal_ctx == NULL) { @@ -696,6 +699,8 @@ static int halDeviceMonitorStartup(void) fprintf(stderr, "%s: dbus_bus_get failed\n", __FUNCTION__); goto failure; } + dbus_connection_set_exit_on_disconnect(dbus_conn, FALSE); + if (!libhal_ctx_set_dbus_connection(hal_ctx, dbus_conn)) { fprintf(stderr, "%s: libhal_ctx_set_dbus_connection failed\n", __FUNCTION__); -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|

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[libvirt] Update on host interface configuration
by David Lutterkort 01 Mar '09

01 Mar '09

Hi, I thought I'd write an update of what I've been doing with the host interface configuration previously discussed[1] After talking with Dan Williams, who is working in NetworkManager, it is clear that the network interface functionality for libvirt is also useful for NM and would help them with handling system-wide interface configuration. To accomodate that, I will implement network interface configuration in a separate library (inspiringly called 'netcf', until somebody thinks of something catchier) and add public API to libvirt that will use netcf to do the actual work. One thorny issue is how libvirt's public API and netcf's public API relate to each other, especially since both libvirt and netcf use XML descriptions to describe network interfaces (netcf does that for exactly the same reasons that libvirt does it, since it will have to deal with similar stability issues) For the time being, I am assuming that the two XML descriptions are identical, with no guarantee that that will always be the case. If and when we run into a case where libvirt's and netcf's needs diverge, we'll break that identity. On the implementation side, that means that, for now, netcf will do all the validation and pass errors back to libvirt. In more concrete terms, I put up a git repo[2] for netcf. There's hardly any code in there, the things I'd particularly appreciate review/feedback on are * the RelaxNG specification of the interface XML (in xml/interface.rng) together with examples of such interface specifications (in tests/interface/) * the (very rough) sketch of the netcf public API, which should map almost 1-1 to the public libvirt API in src/netcf.h I know that the XML schema doesn't cover everything we've discussed in [1], but I think it's a small enough subset to tackle relatively quickly and large enough to be useful. So, one of the main things to think about when looking at the schema is places where the schema would make it hard to make desirable enhancements in the near future (like Marius' point about default routes/gateways) One important point about the model of network config in the schema is that it is centered around what NM calls a 'connection' (though it's called 'interface' in the schema): a grouping of the components that make up the interface the user really cares about (a bridge or a bond) together with the components subordinate to it (e.g. ethernet interfaces enslaved to the bridge or bond) It's those groups that netcf deals with, i.e. if eth0 is enslaved to br0, netcf won't list eth0 as an interface, but only br0, with eth0 as a subinterface. For the implementation, netcf will have a separate backend for each network configuration regime (initscripts for Fedora/RHEL, /etc/network/interfaces for Debian, ...) - once the initscripts backend is done, I'd be very grateful for contributions for the other backends. To sketch out the initscripts implementation, I wrote two XSL stylesheets, xml/initscripts-get.xml that goes from interface XML -> initscripts files (via Augeas) and xml/initscripts-put.xml to go the other way for querying; I'll use those for the core of the initscripts backend. Whether other backands can be done in a similar manner is TBD. David [1] https://www.redhat.com/archives/libvir-list/2009-January/msg00350.html [2] http://git.et.redhat.com/?p=netcf.git;a=tree

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[libvirt] Problem installing KVM Guest from command line
by aliahsan naqvi 28 Feb '09

28 Feb '09

Hi All >From past many days i am trying to install KVM Guest Machine from command line via virt-install.Below is many command i have testing this on Fedora 9 and fedora 10 but not able to do it. virt-install -n testing -r 256 -w bridge:virbr0 --location /mnt/Fedora-10-i386-DVD.iso --accelerate --os-type=linux --hvm --nographics -f /var/imgVM1 --force -x "console=ttyS0" I am installing from HTTP server.After give Network information.Following error comes.i have also tried with NFS and ftp but same result.It seem guest machine not able to get ip address.Because when i ping the ip address of the guest which is provided in Networking setting during guest installation.It was not pingable.And this http server is working fine.i can browse all the install directory with no problem and i have install other machine with the http install directory. I am getting following error after TCP/IP Manual/ DHCP Configuration Network Settings +-----------+ Error +------------+ | | | Unable to retrieve | | http://192.168.1.8/fedora | | /linux/releases/10/Fedora/i38 | | 6/os//images/install.img. | | | | +----+ | | | OK | | | +----+ | | | | | +--------------------------------+ Please Advise.Please let me if i am doing some thing wrong or this a bug. _________________________________________________________________ Windows Live™: Life without walls. http://windowslive.com/explore?ocid=TXT_TAGLM_WL_allup_1a_explore_032009

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RE: [libvirt] Help with bridged networking
by Jesus Urroa 27 Feb '09

27 Feb '09

Hi, Thanks all for your help, I installed libvirt 0.6.0-4 and kvm 84-1 from fedora's rawhide and that solved the problem. However know I have a new problem I tried the other virtual machines and some of them just don't start, they seem to stop when the bios jumps to the disk and grub, any ideas? The only thing I can think of is to upgrade the host kernel but if I'm not wrong I have to upgrade to Fedora 9 or 10, and I would like to try something else before because I want to have everything running before leaving xen completely > Subject: RE: [libvirt] Help with bridged networking > From: lutter(a)redhat.com > To: observer1(a)hotmail.es > Date: Fri, 27 Feb 2009 08:48:13 -0800 > > On Fri, 2009-02-27 at 00:55 +0000, Jesus Urroa wrote: > > My mistake I see the lines for the ip config commented out in the file > > and I place them again > > Anyway I remove the card from the bridge to simplify the problem a > > little, this the output of brctl show for the bridge using only xen > > (no libvirt at all) and using kvm with libvirt and running only 2 vms: > > > > worknet 8000.feffffffffff no vif1.0 > > vif4.0 > > vif5.0 > > vif6.1 > > vif7.1 > > vif8.0 > > > > worknet 8000.00ff52959073 no vnet0 > > > > vnet3 > > With the non-Xen setup, your bridge should have the same IP address as > the enslaved NIC. > > What exactly is not working ? Can VM's on the same bridge ping each > other ? > > Did you add teh following iptables rule (to forward packages from the > bridge to the outside): > > # echo "-I FORWARD -m physdev --physdev-is-bridged -j ACCEPT" > /etc/sysconfig/iptables-forward-bridged > # lokkit --custom-rules=ipv4:filter:/etc/sysconfig/iptables-forward-bridged > # service libvirtd reload > > Otherwise, your VM;s can't talk to the outside. > > David > > _________________________________________________________________ Anímate y disfruta con los mejores juegos de Messenger, ¡descúbrelos! http://www.vivelive.com/juegos/

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[libvirt] internal error Timed out while reading console log output
by jmandawg 27 Feb '09

27 Feb '09

Hi, I just compiled installed Libvirt from the latest git repo, and for some reason when I try to start a VM from virsh I get the following error: virsh # start XPTest error: Failed to start domain XPTest error: internal error unable to start guest: and the corresponding output from libvirtd running in verbose mode: 08:19:53.163: info : Received unexpected signal 17 08:20:00.083: info : Received unexpected signal 17 08:20:00.095: info : Received unexpected signal 17 08:20:03.200: error : internal error Timed out while reading console log output libvir: QEMU error : internal error Timed out while reading console log output 08:20:03.200: error : internal error unable to start guest: libvir: QEMU error : internal error unable to start guest: Here is the command virsh is trying to run from the Libvirt log file: LC_ALL=C PATH=/usr/bin:/bin:/root/bin:/usr/X11R6/bin:/usr/local/kvm/bin:/usr/local/sb in:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games HOME=/root USER=root LOGNAME=root /usr/bin/kvm -S -M pc -m 512 -smp 1 -name XPTest -uuid 732fcba8-b71f-face-e067-cf8431fc94aa -monitor pty -pidfile /var/run/libvirt/qemu//XPTest.pid -localtime -no-acpi -boot c -drive file=/var/kvm-images/XPTest/XP_Test.img,if=ide,index=0,boot=on -net nic,macaddr=00:0c:29:f6:c4:f8,vlan=0,model=e1000 -net tap,fd=20,script=,vlan=0,ifname=vnet3 -serial none -parallel none -usb -usbdevice tablet -vnc 0.0.0.0:9 If I start the VM from the commandline manually using this command and then shutdown, I can successfully start it from Virsh qemu-system-x86_64 -no-acpi -m 512 -hda XP_Test.img \ -net nic,macaddr=00:0C:29:F6:C4:F8 \ -net tap \ -usb -usbdevice tablet \ -monitor unix:monitor,server,nowait \ -soundhw all \ -pidfile pid & virsh # version Compiled against library: libvir 0.6.0 Using library: libvir 0.6.0 Using API: QEMU 0.6.0 Running hypervisor: QEMU 0.9.1 Any help would be appreciated. Thanks, John

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