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[libvirt] PATCH: Depend on libcgroup & turn on cgconfig initscript
by Daniel P. Berrange 10 Feb '10

10 Feb '10

Since libvirt uses cgroups for various aspects of guest tuning, we need to make sure that the host is configured with them enabled out of the box. The libcgroup maintainer has now provided a suitable default config that mounts them all in /cgroup. So libvirt simply needs to depend on libcgroup RPM, and turn on the 'cgconfig' initscript at install time if QEMU or LXC is enabled. diff -u -r1.81 libvirt.spec --- libvirt.spec 3 Feb 2010 17:54:54 -0000 1.81 +++ libvirt.spec 9 Feb 2010 12:49:25 -0000 @@ -61,6 +61,7 @@ %define with_udev 0%{!?_without_udev:0} %define with_hal 0%{!?_without_hal:0} %define with_yajl 0%{!?_without_yajl:0} +%define with_cgconfig 0%{!?_without_cgconfig:0} # Non-server/HV driver defaults which are always enabled %define with_python 0%{!?_without_python:1} @@ -147,6 +148,13 @@ %define with_yajl 0%{!?_without_yajl:%{server_drivers}} %endif +# Pull in cgroups config system +%if 0%{?fedora} >= 12 || 0%{?rhel} >= 6 +%if %{with_qemu} || %{with_lxc} +%define with_cgconfig 0%{!?_without_cgconfig:1} +%endif +%endif + # Force QEMU to run as non-root %if 0%{?fedora} >= 12 || 0%{?rhel} >= 6 %define qemu_user qemu @@ -244,6 +252,9 @@ # For multipath support Requires: device-mapper %endif +%if %{with_cgconfig} +Requires: libcgroup +%endif %if %{with_xen} BuildRequires: xen-devel %endif @@ -634,6 +645,12 @@ fi %endif +%if %{with_cgconfig} +if [ "$1" = "1" ]; then +/sbin/chkconfig cgconfig on +fi +%endif + /sbin/chkconfig --add libvirtd if [ "$1" -ge "1" ]; then /sbin/service libvirtd condrestart > /dev/null 2>&1 -- |: 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] [PATCH] escape strings serialized in XML
by Daniel Veillard 10 Feb '10

10 Feb '10

A large part of the serialization code in src/conf/node_device_conf.c forgot that rule, this led to https://bugzilla.redhat.com/show_bug.cgi?id=547045 Escape strings serialized in XML * src/conf/node_device_conf.c: string saved into XML should be escaped with the use of virBufferEscapeString() diff --git a/src/conf/node_device_conf.c b/src/conf/node_device_conf.c index 4e8a492..69f42a9 100644 --- a/src/conf/node_device_conf.c +++ b/src/conf/node_device_conf.c @@ -372,19 +372,21 @@ char *virNodeDeviceDefFormat(virConnectPtr conn, virBufferVSprintf(&buf, " <protocol>%d</protocol>\n", data->usb_if.protocol); if (data->usb_if.description) - virBufferVSprintf(&buf, " <description>%s</description>\n", + virBufferEscapeString(&buf, + " <description>%s</description>\n", data->usb_if.description); break; case VIR_NODE_DEV_CAP_NET: - virBufferVSprintf(&buf, " <interface>%s</interface>\n", + virBufferEscapeString(&buf, " <interface>%s</interface>\n", data->net.ifname); if (data->net.address) - virBufferVSprintf(&buf, " <address>%s</address>\n", + virBufferEscapeString(&buf, " <address>%s</address>\n", data->net.address); if (data->net.subtype != VIR_NODE_DEV_CAP_NET_LAST) { const char *subtyp = virNodeDevNetCapTypeToString(data->net.subtype); - virBufferVSprintf(&buf, " <capability type='%s'/>\n", subtyp); + virBufferEscapeString(&buf, " <capability type='%s'/>\n", + subtyp); } break; case VIR_NODE_DEV_CAP_SCSI_HOST: @@ -392,10 +394,10 @@ char *virNodeDeviceDefFormat(virConnectPtr conn, data->scsi_host.host); if (data->scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST) { virBufferAddLit(&buf, " <capability type='fc_host'>\n"); - virBufferVSprintf(&buf, - " <wwnn>%s</wwnn>\n", data->scsi_host.wwnn); - virBufferVSprintf(&buf, - " <wwpn>%s</wwpn>\n", data->scsi_host.wwpn); + virBufferEscapeString(&buf, " <wwnn>%s</wwnn>\n", + data->scsi_host.wwnn); + virBufferEscapeString(&buf, " <wwpn>%s</wwpn>\n", + data->scsi_host.wwpn); virBufferAddLit(&buf, " </capability>\n"); } if (data->scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS) { @@ -405,8 +407,8 @@ char *virNodeDeviceDefFormat(virConnectPtr conn, break; case VIR_NODE_DEV_CAP_SCSI_TARGET: - virBufferVSprintf(&buf, " <target>%s</target>\n", - data->scsi_target.name); + virBufferEscapeString(&buf, " <target>%s</target>\n", + data->scsi_target.name); break; case VIR_NODE_DEV_CAP_SCSI: @@ -416,23 +418,23 @@ char *virNodeDeviceDefFormat(virConnectPtr conn, data->scsi.target); virBufferVSprintf(&buf, " <lun>%d</lun>\n", data->scsi.lun); if (data->scsi.type) - virBufferVSprintf(&buf, " <type>%s</type>\n", - data->scsi.type); + virBufferEscapeString(&buf, " <type>%s</type>\n", + data->scsi.type); break; case VIR_NODE_DEV_CAP_STORAGE: - virBufferVSprintf(&buf, " <block>%s</block>\n", + virBufferEscapeString(&buf, " <block>%s</block>\n", data->storage.block); if (data->storage.bus) - virBufferVSprintf(&buf, " <bus>%s</bus>\n", + virBufferEscapeString(&buf, " <bus>%s</bus>\n", data->storage.bus); if (data->storage.drive_type) - virBufferVSprintf(&buf, " <drive_type>%s</drive_type>\n", + virBufferEscapeString(&buf, " <drive_type>%s</drive_type>\n", data->storage.drive_type); if (data->storage.model) - virBufferVSprintf(&buf, " <model>%s</model>\n", + virBufferEscapeString(&buf, " <model>%s</model>\n", data->storage.model); if (data->storage.vendor) - virBufferVSprintf(&buf, " <vendor>%s</vendor>\n", + virBufferEscapeString(&buf, " <vendor>%s</vendor>\n", data->storage.vendor); if (data->storage.serial) virBufferVSprintf(&buf, " <serial>%s</serial>\n", -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel(a)veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/

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[libvirt] [0/3] Rebased patches for SPICE graphics support
by Daniel Veillard 10 Feb '10

10 Feb '10

This is a rebase of the 4 RHEL specific patches posted last sptember by Dan Berrange (but with patch 3 and 4 merged). It's actually a rebase from the gitorious spice set from Dan http://www.redhat.com/archives/libvir-list/2009-September/msg00865.html -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel(a)veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/

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[libvirt] [PATCH] fix AppArmor security driver when libvirt is compiled with libcap-ng
by Jamie Strandboge 10 Feb '10

10 Feb '10

The calls to virExec() in security_apparmor.c when invoking virt-aa-helper use VIR_EXEC_CLEAR_CAPS. When compiled without libcap-ng, this is not a problem (it's effectively a no-op) but with libcap-ng this causes MAC_ADMIN to be cleared. MAC_ADMIN is needed by virt-aa-helper to manipulate apparmor profiles and without it VMs will not start[1]. This patch calls virExec with the default VIR_EXEC_NONE instead. [1] https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/517714 -- Jamie Strandboge | http://www.canonical.com

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[libvirt] [PATCH 0/9] virDomain{Attach,Detach}DeviceFlags patches
by Jim Fehlig 10 Feb '10

10 Feb '10

This set implements two new APIs, virDomainAttachDeviceFlags and virDomainDetachDeviceFlags as discussed here https://www.redhat.com/archives/libvir-list/2009-December/msg00124.html Introduce two new APIs virDomainAttachDeviceFlags(virDomainPtr dom, const char *xml, unsigned flags) virDomainDetachDeviceFlags(virDomainPtr dom, const char *xml, unsigned flags) with flags being one or more from VIR_DOMAIN_DEVICE_MODIFY_CURRENT, VIR_DOMAIN_DEVICE_MODIFY_LIVE, VIR_DOMAIN_DEVICE_MODIFY_CONFIG. If caller specifies CURRENT (default), add or remove the device depending on the current state of domain. E.g. if domain is active add or remove the device to/from live domain, if it is inactive change the persistent config. If caller specifies LIVE, only change the active domain. If caller specifies CONFIG, only change persistent config - even if the domain is active. If caller specifies both LIVE and CONFIG, then change both. If a driver can not satisfy the exact requested flags it must return an error. E.g if user specified LIVE but the driver can only change live and persisted config, the driver must fail the request. The existing virDomain{Attach,Detach}Device is now explicitly restricted to active domains and is equivalent to virDomain{Attach,Detach}DeviceFlags(LIVE). Finally, virsh {attach,detach}-{disk,interface,device} has been modified to add a --persistent flag in order to set the appropriate flags when calling the new APIs. Jim Fehlig (9): Restrict virDomain{Attach,Detach}Device to active domains Public API Internal API Public API Implementation Wire protocol format Remote driver Server side dispatcher domain{Attach,Detach}DeviceFlags handler for drivers Modify virsh commands daemon/remote.c | 53 ++++++++++++++++++ include/libvirt/libvirt.h.in | 13 +++++ src/driver.h | 10 ++++ src/esx/esx_driver.c | 2 + src/libvirt.c | 120 ++++++++++++++++++++++++++++++++++++++---- src/libvirt_public.syms | 6 ++ src/lxc/lxc_driver.c | 2 + src/opennebula/one_driver.c | 2 + src/openvz/openvz_driver.c | 2 + src/phyp/phyp_driver.c | 2 + src/qemu/qemu_driver.c | 26 +++++++++ src/remote/remote_driver.c | 54 +++++++++++++++++++ src/remote/remote_protocol.x | 17 ++++++- src/test/test_driver.c | 2 + src/uml/uml_driver.c | 2 + src/vbox/vbox_tmpl.c | 24 ++++++++ src/xen/proxy_internal.c | 4 +- src/xen/xen_driver.c | 42 +++++++++++++-- src/xen/xen_driver.h | 4 +- src/xen/xen_hypervisor.c | 4 +- src/xen/xen_inotify.c | 4 +- src/xen/xend_internal.c | 98 ++++++++++++++++++++++++++++------ src/xen/xm_internal.c | 30 +++++++---- src/xen/xs_internal.c | 4 +- tools/virsh.c | 55 +++++++++++++++++-- 25 files changed, 523 insertions(+), 59 deletions(-)

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[libvirt] [PATCH] Create raw storage files with O_DSYNC
by Jiri Denemark 10 Feb '10

10 Feb '10

When creating preallocated large raw files opening them with O_DSYNC prevents long delays in reading because cache pages can be immediately reused without writing them on a disk first. Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com> --- src/storage/storage_backend.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c index e79294a..8aab9ab 100644 --- a/src/storage/storage_backend.c +++ b/src/storage/storage_backend.c @@ -301,7 +301,7 @@ virStorageBackendCreateRaw(virConnectPtr conn, goto cleanup; } - if ((fd = open(vol->target.path, O_RDWR | O_EXCL)) < 0) { + if ((fd = open(vol->target.path, O_RDWR | O_EXCL | O_DSYNC)) < 0) { virReportSystemError(conn, errno, _("cannot open new path '%s'"), vol->target.path); -- 1.6.6.1

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[libvirt] ANNOUNCE: New releases virt-manager 0.8.3 and virtinst 0.500.2
by Cole Robinson 10 Feb '10

10 Feb '10

I'm happy to announce two new releases: virt-manager 0.8.3: virt-manager is a desktop application for managing KVM and Xen virtual machines via libvirt. virtinst 0.500.2: virtinst is a collection of command line tools for provisioning libvirt virtual machines, including virt-install and virt-clone. The releases can be downloaded from: http://virt-manager.org/download.html The direct download links are: http://virt-manager.org/download/sources/virt-manager/virt-manager-0.8.3.ta… http://virt-manager.org/download/sources/virtinst/virtinst-0.500.2.tar.gz The virt-manager release includes: - New ability to manage network interfaces: start, stop, and view existing interfaces. Provision new bridge, bond, and vlan devices. - New option to 'customize VM before install', which allows adjusting most VM options from the install wizard. The virtinst release includes: - virt-install: --autostart option for setting domain autostart flag - virt-install: Allow specifying --host-device with lsusb and lspci format (0x1234:0x5678 for USB, etc) - virtinst: New 'Interface' module for building libvirt interface XML Thanks to everyone who has contributed to this release through testing, bug reporting, submitting patches, and otherwise sending in feedback! Thanks, Cole

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Re: [libvirt] Live migration woes
by Lance Albertson 09 Feb '10

09 Feb '10

> On Fri, Feb 05, 2010 at 03:21:32PM -0500, Thomas Sjolshagen wrote: >>> is anyone using libvirt-git and qemu-kvm post-0.11 and can live >>> migrate VMs successfully for- and backwards? qemu-kvm-0.11 seems >>> to be the latest release were live migration works, and I'm >>> trying to figure out if its a kvm or libvirt problem, since there >>> were other things (balloon parameter f.e.) that were changed with >>> qemu-kvm-0.12 and caused troubles when using libvirt. >> >> Yes. >> >> I'm using the virt-preview repo (rawhide) and I just noticed, >> today, after re-upgrading to 0.12.2-5 (since -4 has a rather nasty >> IO problem for virtio devices against raw image files) that my >> live-migrations fail with the following error message on the >> destination system (i.e. the system the I'm trying to migrate to): > >> /var/log/libvirt/qemu/<guest>.log: Unknown savevm section >> -2038417646 load of migration failed > > This looks like a new QEMU bug to me I can confirm this bug is happening on Ganeti as well [1]. It appears that if you sync the time on the guest VM before migrating back to the other node it will "succeed" most of the time. Has anyone opened a bug for this on the qemu-kvm bug tracker yet? I was about to do that myself. Thanks- [1] http://groups.google.com/group/ganeti/browse_thread/thread/9b2c556557e749cf -- Lance Albertson lance <at> osuosl.org Systems Administrator / Architect Open Source Lab Network Services Oregon State University Work: 541-737-9975 PGP Key: 0x27F4B742 GPG Fingerprint 0423 92F3 544A 1282 5AB1 4D07 416F A15D 27F4 B742

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[libvirt] Inbound NAT and iptables rules
by Karl Vogel 09 Feb '10

09 Feb '10

This issue has been brought up a few times, but I haven't found any real solution yet. The problem is with the way libvirt adds iptables rules. I have a KVM Host with 1 public IP address, on which a few virtual machines run. I want to be able to direct certain ports on the public IP to certain virtual machine's internal IP. For example: allow conneciton to 'public-ip' tcp port: 80 to 'vm1' Which is possible using following rules: $ iptables -I FORWARD 1 -d vm1 -p tcp --dport 80 -j ACCEPT $ iptables -t nat -A PREROUTING -p tcp -d public-ip --dport 80 -j DNAT --to-destination vm1 However the problem is that libvirt _always_ adds it's rules to the top of the FORWARD rules, hence it blocks any 'custom' rules to the VM machines. ie. Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 39 2964 ACCEPT all -- * virbr0 0.0.0.0/0 192.168.122.0/24 state RELATED,ESTABLISHED 39 2964 ACCEPT all -- virbr0 * 192.168.122.0/24 0.0.0.0/0 2 656 ACCEPT all -- virbr0 virbr0 0.0.0.0/0 0.0.0.0/0 2 120 REJECT all -- * virbr0 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable 0 0 REJECT all -- virbr0 * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable Only established connections are allowed with the libvirt rules, hence the forwarded connection to port 80 will be rejected by the 4th libvirt rule. The only way to make it work is to insert the rule _after_ libvirt has started the network.. and if the libvirt network ever gets restarted, the rule will be disabled since libvirt inserts it's rules at the top of the chain. Is there a proper way to achieve this with libvirt ?!

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[libvirt] qemu can't parse floppy cmdline
by Cole Robinson 09 Feb '10

09 Feb '10

Hi Dan, With qemu-0.12.2-5.fc13.x86_64 in fedora, libvirt is generating a cmdline which qemu-kvm can't parse. XML is: <domain type='kvm'> <name>winxp_32</name> <uuid>3485e26d-c370-c0b0-32e2-a041a12f5cfc</uuid> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-0.11'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu'/> <source file='/mnt/devel/vms/disks/winxp_32.qcow2.img'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu'/> <source file='/mnt/devel/media/win_2003_64.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <disk type='file' device='cdrom'> <target dev='hdb' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='0' unit='1'/> </disk> <disk type='file' device='floppy'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/1.img'/> <target dev='fda' bus='fdc'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'/> <controller type='fdc' index='0'/> <interface type='network'> <mac address='52:54:00:5d:46:22'/> <source network='default'/> <target dev='vnet0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target port='0'/> </console> <input type='tablet' bus='usb'/> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <sound model='es1370'/> <video> <model type='vga' vram='9216' heads='1'/> </video> </devices> </domain> The generated cmdline is: LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc-0.11 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -name winxp_32 -uuid 3485e26d-c370-c0b0-32e2-a041a12f5cfc -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/winxp_32.monitor,server,nowait -mon chardev=monitor,mode=readline -localtime -boot c -drive file=/mnt/devel/vms/disks/winxp_32.qcow2.img,if=none,id=drive-ide0-0-0,boot=on -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive file=/mnt/devel/media/win_2003_64.iso,if=none,media=cdrom,id=drive-ide0-1-0 -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive if=none,media=cdrom,id=drive-ide0-0-1 -device ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -drive file=/var/lib/libvirt/images/1.img,if=none,id=drive-fdc0-0-0,format=raw -global isa-fdc,driveA=drive-fdc0-0-0 -device rtl8139,vlan=0,id=net0,mac=52:54:00:5d:46:22,bus=pci.0,addr=0x4 -net tap,fd=38,vlan=0,name=hostnet0 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:0 -vga std -device ES1370,id=sound0,bus=pci.0,addr=0x5 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 can't parse: "isa-fdc,driveA=drive-fdc0-0-0" If I drop the floppy dev and controller, the guest boots, but a few warnings are printed. Not sure if any of this reflects qemu bugs or libvirt bugs: LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc-0.11 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -name winxp_32 -uuid 3485e26d-c370-c0b0-32e2-a041a12f5cfc -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/winxp_32.monitor,server,nowait -mon chardev=monitor,mode=readline -localtime -boot c -drive file=/mnt/devel/vms/disks/winxp_32.qcow2.img,if=none,id=drive-ide0-0-0,boot=on -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive file=/mnt/devel/media/win_2003_64.iso,if=none,media=cdrom,id=drive-ide0-1-0 -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive if=none,media=cdrom,id=drive-ide0-0-1 -device ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -device rtl8139,vlan=0,id=net0,mac=52:54:00:5d:46:22,bus=pci.0,addr=0x4 -net tap,fd=37,vlan=0,name=hostnet0 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:0 -vga std -device ES1370,id=sound0,bus=pci.0,addr=0x5 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 char device redirected to /dev/pts/2 Warning: vlan 0 with no nics Option 'ipv4': Use 'on' or 'off' Failed to parse "yes" for "dummy.ipv4" Thanks, Cole

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