October 2010 - Devel - libvirt List Archives

[libvirt] cpulimit and kvm process
by Mihamina Rakotomandimby 01 Oct '10

01 Oct '10

Manao ahoana, Hello, Bonjour, I would like to launch several KVM guests on a multicore CPU. The number of the KVM process is over the number of physical cores. I would like to limit each KVM process to say... 10% of CPU I first use "cpulimit " Would you know some better way to limit them? it's in order to avoid 4 VM to hog all the 4 hardware cores. I also use all the livbirt tools, if there si any sol Misaotra, Thanks, Merci. -- Architecte Informatique chez Blueline/Gulfsat: Administration Systeme, Recherche & Developpement +261 34 56 000 19

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[libvirt] Ejecting ISO from cdrom
by Jaromír Červenka 01 Oct '10

01 Oct '10

Hello, how can I remove ISO image from cdrom in running domain, please? I tried procedure which is described on your wiki ( http://wiki.libvirt.org/page/QEMUSwitchToLibvirt#eject_DEV) but it doesn't work for me: divinus:/kvm/iso # virsh attach-disk --type cdrom --mode readonly leon.i-tux.cz "" hdc error: command 'attach-disk' requires <target> option divinus:/kvm/iso # virsh attach-disk --type cdrom --mode readonly leon.i-tux.cz "" --target hdc error: command 'attach-disk' requires <source> option divinus:/kvm/iso # virsh attach-disk --type cdrom --mode readonly leon.i-tux.cz --source "" --target hdc error: expected syntax: --source <string> Thank you, Jaromír Červenka

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[libvirt] [PATCH] phyp: Verify that domain XML contains at least one disk element
by Matthias Bolte 01 Oct '10

01 Oct '10

phypBuildLpar expects that at least one disk element is provided. --- src/phyp/phyp_driver.c | 18 +++++++++++------- 1 files changed, 11 insertions(+), 7 deletions(-) diff --git a/src/phyp/phyp_driver.c b/src/phyp/phyp_driver.c index ab12392..0a7d6f9 100644 --- a/src/phyp/phyp_driver.c +++ b/src/phyp/phyp_driver.c @@ -3715,13 +3715,17 @@ phypBuildLpar(virConnectPtr conn, virDomainDefPtr def) goto err; } - if (def->ndisks > 0) { - if (!def->disks[0]->src) { - PHYP_ERROR(VIR_ERR_XML_ERROR,"%s", - _("Field \"<src>\" under \"<disk>\" on the domain XML file is " - "missing.")); - goto err; - } + if (def->ndisks < 1) { + PHYP_ERROR(VIR_ERR_XML_ERROR, "%s", + _("Domain XML must contain at least one \"<disk>\" element.")); + goto err; + } + + if (!def->disks[0]->src) { + PHYP_ERROR(VIR_ERR_XML_ERROR,"%s", + _("Field \"<src>\" under \"<disk>\" on the domain XML file is " + "missing.")); + goto err; } virBufferAddLit(&buf, "mksyscfg"); -- 1.7.0.4

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[libvirt] [PATCH] PHYP: Checking for NULL values when building new guest
by Eduardo Otubo 01 Oct '10

01 Oct '10

When creating a new gust, the function phypBuildLpar() was not checking for NULL values, making the driver to have a segmentation fault. --- src/phyp/phyp_driver.c | 19 +++++++++++++++++++ 1 files changed, 19 insertions(+), 0 deletions(-) diff --git a/src/phyp/phyp_driver.c b/src/phyp/phyp_driver.c index 251111d..999870e 100644 --- a/src/phyp/phyp_driver.c +++ b/src/phyp/phyp_driver.c @@ -3701,6 +3701,25 @@ phypBuildLpar(virConnectPtr conn, virDomainDefPtr def) int exit_status = 0; virBuffer buf = VIR_BUFFER_INITIALIZER; + if (!def->name) { + VIR_ERROR0(_("Field \"<name>\" on the domain XML file missing.")); + goto err; + } else if (!def->memory) { + VIR_ERROR0(_ + ("Field \"<memory>\" on the domain XML file missing.")); + goto err; + } else if (!def->maxmem) { + VIR_ERROR0(_ + ("Field \"<currentMemory>\" on the domain XML file missing.")); + goto err; + } else if (!def->vcpus) { + VIR_ERROR0(_("Field \"<vcpu>\" on the domain XML file missing.")); + goto err; + } else if (!def->disks[0]->src) { + VIR_ERROR0(_("Field \"<disk>\" on the domain XML file missing.")); + goto err; + } + virBufferAddLit(&buf, "mksyscfg"); if (system_type == HMC) virBufferVSprintf(&buf, " -m %s", managed_system); -- 1.7.0.4

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[libvirt] dumpxml doesn't export 'boot' options
by Jaromír Červenka 01 Oct '10

01 Oct '10

Hi again, I added another boot options to my running domain, like this: # virsh edit leon.i-tux.cz <os> ... <boot dev='cdrom'/> <bootmenu enable='yes'/> </os> (Note: "dev='hd" was already present) Right after :wq (vim commands) -> # Domain leon.i-tux.cz XML configuration edited. Now when I did "virsh dumpxml leon.i-tux.cz" these new boot options are missing in output. But "cat /etc/libvirt/qemu/leon.i-tux.cz.xml" shows me these new options and "virsh edit" also. Is it some bug or normal behavior? I also noticed that these options disappear after restarting libvirt daemon - but only from "virsh edit", not from /etc/... xml file. I would like to do some kind of backups of my domains thru dumpxml :) Maybe the best way will be to backup all in /etc/libvirt. Thank you, Jaromír.

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[libvirt] Storage volume
by Jaromír Červenka 01 Oct '10

01 Oct '10

Hello, is there any way, how to create storage volume from existing qcow2 image file? I have XML description for this new volume and image which was used without xml. But when I tried "vol-create" it automatically deleted this file and created new one. Thank you, Jaromír Červenka Official openSUSE community member Web: http://www.cervajz.com/ Jabber: cervajz(a)cervajz.com MSN: jara.cervenka(a)seznam.cz Tel.: +420 607 592 687 Alt. e-mails: jaromir.cervenka(a)opensuse.org, jaromir.cervenka(a)speel.cz

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[libvirt] [PATCH] 1/1: implement usb and pci hot attach in AppArmor driver
by Jamie Strandboge 01 Oct '10

01 Oct '10

The AppArmor security driver has partial support for hostdev devices in that if they already exist in the XML, virt-aa-helper can find them and add them to the profile. Hot attach does not work[1] because AppArmorSetSecurityHostdevLabel and AppArmorRestoreSecurityHostdevLabel are not currently implemented. From the patch description: Implement AppArmorSetSecurityHostdevLabel() and AppArmorRestoreSecurityHostdevLabel() for hostdev and pcidev attach. virt-aa-helper also has to be adjusted because *FileIterate() is used for pci and usb devices and the corresponding XML for hot attached hostdev and pcidev is not in the XML passed to virt-aa-helper. The new '-F filename' option is added to append a rule to the profile as opposed to the existing '-f filename', which rewrites the libvirt-<uuid>.files file anew. This new '-F' option will append a rule to an existing libvirt-<uuid>.files if it exists, otherwise it acts the same as '-f'. load_profile() and reload_profile() have been adjusted to add an 'append' argument, which when true will use '-F' instead of '-f' when executing virt-aa-helper. All existing calls to load_profile() and reload_profile() have been adjusted to use the old behavior (ie append==false) except AppArmorSetSavedStateLabel() where it made sense to use the new behavior. This patch also adds tests for '-F' The tests still use the old convention of cat with sed that Eric Blake mentioned should be improved-- I will be submitting another patch for this. This patch compiles fine with --enable-compile-warnings=error, passes the parts of 'make check' that this patch touches (ie, the daemon-conf fails here, but it always fails for me) and passes 'syntax-check'. Jamie [1]https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/640993 -- Jamie Strandboge | http://www.canonical.com

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