February 2009 - Devel - libvirt List Archives

[libvirt] Help with bridged networking
by watcher lines 27 Feb '09

27 Feb '09

Hi, I have setup my virtual networks with initscripts like in this link: http://wiki.libvirt.org/page/Networking#Bridged_networking_.28aka_.22shared…, but there is no networking whitin any system either between vms or with the host and the vms. This setup is for kvm, but with Xen in Fedora 8 it works perfect, but xen is now deprecated in Fedora. This is my setup: /etc/sysconfig/network-scripts/ifcfg-worknet: # worknet bridge DEVICE=worknet BOOTPROTO=none BROADCAST=172.16.1.255 #HWADDR=00:50:56:C0:00:01 IPADDR=172.16.1.1 NETMASK=255.255.255.0 NETWORK=172.16.1.0 ONBOOT=yes TYPE=Bridge STP=off DELAY=0 With Xen this alone lets ip traffic pass between host and to allow dhcp and other protocols i have this line in my iptables: -A FORWARD -i worknet -j ACCEPT This is the software I'm using: libvirt-0.4.4-2.fc8 kvm-60-7.fc8 Thanks for your attention. _________________________________________________________________ Consigue gratis el nuevo Messenger. ¡Descárgatelo! http://download.live.com/

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[libvirt] networking with two hosts
by Andreas Rittershofer 27 Feb '09

27 Feb '09

The following situation is given: Host A with VM1 and VM2 running. Host B with VM3 und VM4 running. Task 1.) Each VM must have network access to each other VM and to the outside. Task 2.) When one host fails, all VMs are running on the remainig host and 1.) must still be fulfilled. Does somebody has any hints about realising this scenario with libvirt and KVM? mfg ar -- Hier könnte keine Signatur stehen.

3 7

[libvirt] Adding VirtualBox support to libvirt
by Pritesh Kothari 27 Feb '09

27 Feb '09

Hi, I am in the process of adding support for virtualbox in libvirt. Basically Virtualbox exports its API through XPCOM. Now to simplify things I was thinking of using C++ and already existing xpcom component in virtualbox but since libvirt exports C API i am not sure if i should use C++ or stick to plain C. I would like to request the libvirt community for its comment on this. Regards, Pritesh

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[libvirt] PATCH: Support memory balloon device in QEMU (incomplete)
by Daniel P. Berrange 27 Feb '09

27 Feb '09

This is an incomplete patch starting to support the memory balloon device in QEMU guests. This requires the VirtIO Balloon driver be present in the guest. In much the same way as with Xen guests, this lets you adjust the memory allocation of the guest on the fly, ceiling limited by the initial memory allocation when booted. The missing bit is to use 'info balloon' to fetch the current allocation for the virDomainGetInfo() API call. Regards, Daniel diff -r 2662c220efc8 src/qemu_driver.c --- a/src/qemu_driver.c Thu Feb 26 15:31:11 2009 +0000 +++ b/src/qemu_driver.c Thu Feb 26 15:31:23 2009 +0000 @@ -2223,6 +2223,46 @@ cleanup: return ret; } + +static int qemudDomainSetMemoryBalloon(virConnectPtr conn, + virDomainObjPtr vm, + unsigned long newmem) { + char *cmd; + char *reply; + + /* + * 'newmem' is in KB, QEMU monitor works in MB, and we all wish + * we just worked in bytes with unsigned long long everywhere. + */ + if (virAsprintf(&cmd, "balloon %lu", (newmem / 1024)) < 0) { + virReportOOMError(conn); + return -1; + } + + if (qemudMonitorCommand(vm, cmd, &reply) < 0) { + qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, + "%s", _("could not balloon memory allocation")); + VIR_FREE(cmd); + return -1; + } + VIR_FREE(cmd); + + /* If the command failed qemu prints: + * device not found, device is locked ... + * No message is printed on success it seems */ + DEBUG ("balloon reply: %s", reply); + if (strstr(reply, "\nunknown command:")) { + qemudReportError (conn, dom, NULL, VIR_ERR_OPERATION_FAILED, + _("memory ballooning is not supported %s"), reply); + VIR_FREE(reply); + return -1; + } + VIR_FREE(reply); + + return 0; +} + + static int qemudDomainSetMemory(virDomainPtr dom, unsigned long newmem) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; @@ -2240,20 +2280,18 @@ static int qemudDomainSetMemory(virDomai goto cleanup; } + if (newmem > vm->def->maxmem) { + qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, + "%s", _("cannot set memory higher than max memory")); + goto cleanup; + } + if (virDomainIsActive(vm)) { - qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, - "%s", _("cannot set memory of an active domain")); - goto cleanup; - } - - if (newmem > vm->def->maxmem) { - qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, - "%s", _("cannot set memory higher than max memory")); - goto cleanup; - } - - vm->def->memory = newmem; - ret = 0; + ret = qemudDomainSetMemoryBalloon(dom->conn, vm, newmem); + } else { + vm->def->memory = newmem; + ret = 0; + } cleanup: if (vm) -- |: 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]: Fix non-live migration failure case
by Chris Lalancette 27 Feb '09

27 Feb '09

All, There was a logic error in the Qemu driver when doing a non-live migrate. During a non-live migrate, on the source host during the Perform step, we pause the domain; however, if there was ever a failure, we were forgetting to unpause the domain, meaning that the domain was paused forever. Add a flag to tell us when we should unpause the domain after a failure. Signed-off-by: Chris Lalancette <clalance(a)redhat.com>

2 2

[libvirt] [PATCH 0/1] Resend of example program
by David Allan 27 Feb '09

27 Feb '09

I'm just resending this patch, as nobody objected to it after I incorporated the feedback I got, but it never got applied, either. Dave

2 2

[libvirt] PATCH: Fix autostart of session daemon
by Daniel P. Berrange 27 Feb '09

27 Feb '09

When connecting qemu:///session we can autostart the libvirtd daemon. With the node device APIs present, it can take upto a second to start up while talking to dbus. The remote driver was only waiting for a fraction of a second. This changes it to wait for upto 2 seconds, and also not to spawn multiple instances of the daemon. Daniel diff -rup libvirt-0.6.0.orig/src/remote_internal.c libvirt-0.6.0.new/src/remote_internal.c --- libvirt-0.6.0.orig/src/remote_internal.c 2009-02-18 10:56:34.000000000 +0000 +++ libvirt-0.6.0.new/src/remote_internal.c 2009-02-18 13:35:26.000000000 +0000 @@ -654,12 +654,13 @@ doRemoteOpen (virConnectPtr conn, */ if (errno == ECONNREFUSED && flags & VIR_DRV_OPEN_REMOTE_AUTOSTART && - trials < 5) { + trials < 20) { close(priv->sock); priv->sock = -1; - if (remoteForkDaemon(conn) == 0) { + if (trials > 0 || + remoteForkDaemon(conn) == 0) { trials++; - usleep(5000 * trials * trials); + usleep(1000 * 100 * trials); goto autostart_retry; } } -- |: 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] storage_backend_fs.c Bug
by Russell 26 Feb '09

26 Feb '09

Line 1133 of storage_backend_fs.c in 0.6.0: if (vol->target.backingStore != NULL) { virStorageReportError(conn, VIR_ERR_NO_SUPPORT, _("copy-on-write image not supported with " "qcow-create")); return -1; } virStorageVolTarget has no member called backingStore, resulting in compile errors.

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[libvirt] [PATCH] Don't generate python bindings multiple times w/ parallel build
by Cole Robinson 26 Feb '09

26 Feb '09

The attached patch was posted by Michael Marineau at: https://bugzilla.redhat.com/show_bug.cgi?id=472702 It prevents generating the python bindings multiple times in a parallel build. Works fine in my testing, so I figured I'd pass it along here for better exposure, since it has been languishing in bugzilla. Thanks, Cole

3 2

[libvirt] [PATCH 0/5] Add device assignment related node device methods
by Mark McLoughlin 26 Feb '09

26 Feb '09

Hi, The following patches implement three new node device methods that are needed for KVM PCI device assignment. The dettach method unbinds the device from its device driver and binds it to the pci-stub driver, if available. This ensures the device is not being used by the host. The reattach method undos this operation. It unbinds the device from pci-stub and attempts to re-bind it to the original device driver. This allows the device to be used by the host again. The reset method is intended to be used on a dettached device before it is used by the guest or host. This operation may in future affect other devices, so it is intended that all devices to be assigned to a guest are first dettached before any device is reset. A writeup of some more background details are available here: http://marc.info/?l=kvm&m=123454366317045 Cheers, Mark.

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[libvirt] [PATCH] document static host IP assignment
by Charles Duffy 26 Feb '09

26 Feb '09

Back in August 2008, DV added support for providing static IP/hostname assignments to dnsmasq via <host> elements in the network definition. Since this functionality isn't covered in the documentation, I wrote up a quick patch, attached.

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[libvirt] [PATCH 0/2] Dettach and reset devices before assigning to guests
by Mark McLoughlin 26 Feb '09

26 Feb '09

Hi, The following two patches build on the previous series. The idea is simple - when starting a guest, we should automatically dettach and reset any devices assigned to it. Rather than change the semantics of the existing hostdev source, we only do this when the node device name is used as the hostdev source. Directly specifying the device address rather than its name can be seen as an option for people who know what they're doing. Cheers, Mark.

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[libvirt] "type 'hvm' & arch 'i686' combination is not supported" error
by Frederik Himpe 25 Feb '09

25 Feb '09

I recently updated for libvirt 0.4.6 to libvirt 0.6.0. Now several of the virtual machines I defined, are not shown in virt-manager nor by virsh list --all, although the config files are still in /etc/libvirt/qemu. I tried to run virsh create, and this error is shown: libvir: Domain Config error : internal error os type 'hvm' & arch 'i686' combination is not supported This configuration was working perfectly with libvirt 0.4.6. I needed to change i686 to x86_64 in all config files of 32 bit systems to make them work again. Is there no way libvirt could migrate those configuration files automatically? -- Frederik Himpe

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[libvirt] Patch to python-virtinst to allow it to choose svirt labels
by Daniel J Walsh 25 Feb '09

25 Feb '09

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Also found at least one big bug in python-virtinst, VirtualDisk.py was dropping the "/" between dirname and basename of installation object, when you told it to create the object. I think we want to have a big switch stored in libvirt somewhere saying whether or not we want isolated virtual machines. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iEYEARECAAYFAkme++4ACgkQrlYvE4MpobM5ewCeP3iaq3HwT/Rw71E2YElbxKyg 66gAoJaCUkQkBvJz80wjztYiwOGsAKaj =GlDN -----END PGP SIGNATURE----- diff -r -u virtinst-0.400.1/virtinst/Guest.py virtinst-0.400.1.new/virtinst/Guest.py --- virtinst-0.400.1/virtinst/Guest.py 2009-01-26 14:33:25.000000000 -0500 +++ virtinst-0.400.1.new/virtinst/Guest.py 2009-02-19 17:36:35.000000000 -0500 @@ -32,6 +32,8 @@ import __builtin__ import CapabilitiesParser import VirtualDevice +import selinux +import random import osdict from VirtualDisk import VirtualDisk @@ -315,8 +317,9 @@ self._install_disk = None # VirtualDisk that contains install media if type is None: - type = "xen" - self.type = type + self.type = "xen" + else: + self.type = type if not location is None: self.location = location @@ -526,6 +529,7 @@ self._vcpus = None self._cpuset = None self._graphics_dev = None + self._seclabel = None self._os_type = None self._os_variant = None @@ -552,12 +556,34 @@ self.disknode = None # this needs to be set in the subclass + self.default_seclabel , self.default_imagelabel = self._default_seclabels() + + while self._seclabel == None: + seclabel, imagelabel = self.gen_seclabels() + if self.is_conflict_seclabel(self.conn, seclabel): + continue + self.set_seclabel(seclabel) + self.set_imagelabel(imagelabel) + def get_installer(self): return self._installer def set_installer(self, val): self._installer = val installer = property(get_installer, set_installer) + # Security context used to secure guest image + def get_imagelabel(self): + return self._imagelabel + def set_imagelabel(self, val): + self._imagelabel = val + imagelabel = property(get_imagelabel, set_imagelabel) + + # Security context used to secure guest process + def get_seclabel(self): + return self._seclabel + def set_seclabel(self, val): + self._seclabel = val + seclabel = property(get_seclabel, set_seclabel) def get_type(self): return self._installer.type @@ -565,7 +591,6 @@ self._installer.type = val type = property(get_type, set_type) - # Domain name of the guest def get_name(self): return self._name @@ -750,7 +775,7 @@ if enabled not in (True, False): raise ValueError, _("Graphics enabled must be True or False") - if enabled == True: + if enabled: gdev = VirtualGraphics(type=gtype) if port: gdev.port = port @@ -807,9 +832,23 @@ """Ensure that devices are setup""" for disk in self._install_disks: disk.setup(progresscb) + # Not sure of this, might want to put this in VirtualDisk class + selinux.setfilecon(disk.path, self._imagelabel) for nic in self._install_nics: nic.setup(self.conn) + def _get_seclabel_xml(self): + xml = "" + if self._seclabel != None: + xml = """ + <seclabel model='selinux'> + <label>%s</label> + <image>%s</image> + </seclabel> +""" % ( self._seclabel, self._imagelabel) + print xml + return xml + def _get_disk_xml(self, install=True): """Return xml for disk devices (Must be implemented in subclass)""" raise NotImplementedError @@ -899,6 +938,7 @@ <devices> %(devices)s </devices> + %(secxml)s </domain> """ % { "type": self.type, "name": self.name, \ @@ -909,7 +949,8 @@ "maxramkb": self.maxmemory * 1024, \ "devices": self._get_device_xml(install), \ "osblob": osblob, \ - "action": action } + "action": action, \ + "secxml": self._get_seclabel_xml()} def start_install(self, consolecb=None, meter=None, removeOld=False, @@ -1026,6 +1067,108 @@ if self.domain is not None: raise RuntimeError, _("Domain has already been started!") + def _default_seclabels(self): + try: + fd = open(selinux.selinux_virtual_domain_context_path(), 'r') + except OSError, (err_no, msg): + raise RuntimeError, \ + "failed to SELinux virtual domains context: %s: %s %s" % (selinux.selinux_virtual_domain_context_path(),err_no, msg) + + label = fd.read() + fd.close() + try: + fd = open(selinux.selinux_virtual_image_context_path(), 'r') + except OSError, (err_no, msg): + raise RuntimeError, \ + "failed to SELinux virtual domains context: %s: %s %s" % (selinux.selinux_virtual_domain_context_path(), err_no, msg) + + image = fd.read() + fd.close() + + return (label, image) + + def is_conflict_seclabel(self, conn, seclabel): + """ + check if security label is in use by any other VMs on passed + connection. + + @param conn: connection to check for collisions on + @type conn: libvirt.virConnect + + @param seclabel: Security Label + @type str: Security label + + @return: True if a collision, False otherwise + @rtype: C{bool} + """ + if not seclabel: + return False + + vms = [] + # get working domain's name + ids = conn.listDomainsID() + for i in ids: + try: + vm = conn.lookupByID(i) + vms.append(vm) + except libvirt.libvirtError: + # guest probably in process of dieing + logging.warn("Failed to lookup domain id %d" % i) + # get defined domain + names = conn.listDefinedDomains() + for name in names: + try: + vm = conn.lookupByName(name) + vms.append(vm) + except libvirt.libvirtError: + # guest probably in process of dieing + logging.warn("Failed to lookup domain name %s" % name) + + count = 0 + for vm in vms: + doc = None + try: + doc = libxml2.parseDoc(vm.XMLDesc(0)) + except: + continue + ctx = doc.xpathNewContext() + try: + try: + label = ctx.xpathEval("/domain/seclabel/label/") + if label[0].content == seclabel: + count += 1 + break + except: + continue + finally: + if ctx is not None: + ctx.xpathFreeContext() + if doc is not None: + doc.freeDoc() + if count > 0: + return True + else: + return False + + def _get_random_mcs(self): + f1 = random.randrange(1024) + f2 = random.randrange(1024) + if f1 < f2: + return "s0:c%s,c%s" % (f1, f2) + else: + if f1 == f2: + return "s0:c%s" % f1 + else: + return "s0:c%s,c%s" % (f2, f1) + + def gen_seclabels(self): + mcs = self._get_random_mcs() + con = self.default_seclabel.split(':') + seclabel = "%s:%s:%s:%s" % (con[0], con[1], con[2], mcs) + con = self.default_imagelabel.split(':') + imagelabel = "%s:%s:%s:%s" % (con[0], con[1], con[2], mcs) + return (seclabel, imagelabel) + def _set_defaults(self): if self.uuid is None: while 1: diff -r -u virtinst-0.400.1/virtinst/VirtualDisk.py virtinst-0.400.1.new/virtinst/VirtualDisk.py --- virtinst-0.400.1/virtinst/VirtualDisk.py 2009-01-26 14:33:25.000000000 -0500 +++ virtinst-0.400.1.new/virtinst/VirtualDisk.py 2009-02-19 19:43:44.000000000 -0500 @@ -172,8 +172,6 @@ """ return "%s:%s" %(self.type, self.path) - - def _get_path(self): return self._path def _set_path(self, val, validate=True): @@ -413,7 +411,7 @@ newpath = self.vol_object.path() elif self.vol_install: newpath = _util.get_xml_path(self.vol_install.pool.XMLDesc(0), - "/pool/target/path") + \ + "/pool/target/path") + "/" + \ self.vol_install.name if newpath and newpath != self.path:

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[libvirt] iptables and libvirt
by Karl Wirth 24 Feb '09

24 Feb '09

Hi, I would like your feedback on the following idea. What if we could flexibly change the iptables rules for the different guests as they are deployed onto the node/host. The idea would be to do all of this within the iptables of the host leaving alone the iptables of the guests themselves. Here are some specifics: - Physical systems typically isolated using firewalls protecting well known ports. - With virt, on shared physical device, use a bridge to give full LAN access to vm - Or a virtual network which is an isolated bridge with no physical connection. Guest can talk to each other directly. Only NAT'd outbound. - The idea is to eventually make it easy to centrally set up iptable rules for guests that are applied in the host iptables. - We would have to be able to migrate the iptables rules and the state data with vm as it moves The benefits of this would be we could: - Create networking controls that provide same isolation as physical systems - Control which VMs can talk to which others Integration option: - Integration in virtd because it knows about the guests and their network parameters. Thanks for your feedback. Best regards, Karl

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[libvirt] About virtualization, libvirt and xen...
by Patrick Archibal 24 Feb '09

24 Feb '09

Hello, I have understand that : ---------------------------- guest ---------------------------- driver_device0_guest ---------------------------- hypervisor ---------------------------- driver_device0_hypervisor ---------------------------- device0 ---------------------------- in order to access to a device, a guest use driver_device0_guest The driver_device0_guest is modified to ask the hypervisor instead of the device0 directly. Then the hypervisor uses the driver_device0_hypervisor in order to ask the device0. It's my understant, maybe it's false. I have few questions : 1 - what is the difference between libvirt and virtio. 2 - why developpers for xen, kvm... must develop drivers each time there are new devices ? Because the driver must ask the hypervisor instead of device directly. 3 - The devices presented to the guest are real or emulated ? (for xen and/or kvm) if devices are real, for example, i can use my graphic card with a virtual machine ?? 4 - Can you tell me why kvm is best or xen is best in enterprise. In my understand, in the future, kvm is in good position because the developpment is integrated in the kernel. Also, i feel xen progress because firms like citrix contribute but it's seems there is no big update since few years. My vision is xen is best for production environnement because it takes advantages of minimal hypervisor code while kvm must be install with the kernel. Also, it seems, performance will be better in kvm with virtio. Can we use virtio with xen ? _________________________________________________________________ Vous voulez savoir ce que vous pouvez faire avec le nouveau Windows Live ? Lancez-vous ! http://www.microsoft.com/windows/windowslive/default.aspx

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[libvirt] [Patch 0/1] enable --checkpoint option in 'virsh save'
by Matt McCowan 24 Feb '09

24 Feb '09

Along the lines of Xen's 'xm save' function with the '-c' checkpoint flag, following up is a patch to basically make-it-so, plus enable it for qemu. Patch merges with CVS, and passes tests as described in the HACKING file. The code implementing the '--live' option for 'virsh migrate' was copied/pasted/mod'ed to create the --checkpoint option for 'virsh save' Regards Matt McCowan

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[libvirt] networking static ip address
by Francisco José Martín 24 Feb '09

24 Feb '09

Hi, we are using the 0.6.0 version and an Ubuntu guest os under KVM virtualization. We have tried several ways to assign a static ip address to the guest os eth0 device on boot, but we didn't success. Is there any easy way to do it? We are trying to have a guest with the ip 192.168.0.1 in the eth0 device, enslaved to the br0 bridge on the host machine, which seems to be a pretty easy setup to test. When the guest OS is booted, the eth0 device exists, but is not up, and doesn't have the IP. Regards, Francisco.

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[libvirt] [PATCH 1/5] Fix a typo in hostdev docs
by Mark McLoughlin 24 Feb '09

24 Feb '09

It's: <address bus='0x06' slot='0x02' function='0x0'/> not: <address>bus='0x06' slot='0x02' function='0x0'</address> Signed-off-by: Mark McLoughlin <markmc(a)redhat.com> --- docs/formatdomain.html | 2 +- docs/formatdomain.html.in | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/formatdomain.html b/docs/formatdomain.html index 17384b3..17dc0cd 100644 --- a/docs/formatdomain.html +++ b/docs/formatdomain.html @@ -485,7 +485,7 @@ ... <hostdev mode='subsystem' type='pci'> <source> - <address>bus='0x06' slot='0x02' function='0x0'</address> + <address bus='0x06' slot='0x02' function='0x0'/> </source> </hostdev> ...</pre> diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index c1e6a16..ee32354 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -397,7 +397,7 @@ ... <hostdev mode='subsystem' type='pci'> <source> - <address>bus='0x06' slot='0x02' function='0x0'</address> + <address bus='0x06' slot='0x02' function='0x0'/> </source> </hostdev> ...</pre> -- 1.6.0.6

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[libvirt] networking with VMs on two nodes
by Andreas Rittershofer 24 Feb '09

24 Feb '09

I have two nodes and on each several virtual machines running under KVM/qemu. I've set up the default-network on each node and so I can: 1.) ping from host do guest 2.) ping from guest to host 3.) ping from guest tu guest But all this is only possibe on each node by itself. What I need now is network connection between a VM on node 1 to another VM on node 2. How to setup this? When both nodes are fine every node runs a few guests. But when one node goes down, all guests have to be run on the remaining node. mfg ar -- Hier könnte keine Signatur stehen.

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[libvirt] Re: [et-mgmt-tools] attach hot usb device
by Cole Robinson 23 Feb '09

23 Feb '09

cc-ing libvir-list (future libvirt questions should be directed there) jmandawg wrote: > Hi, > > > > Quick question, since I can’t get to the qemu monitor anymore, how do I > hot add a usb device (smartphone)? > > Is it possible to do through virsh? > Sure: - Use 'lsusb' to determine the bus and device. Example listing looks like: Bus 001 Device 006: ID 0781:5151 SanDisk Corp. Cruzer Micro 256/512MB Flash Drive - Put hostdev xml in a file: cat << __EOF__ > usb.xml <hostdev mode='subsystem' type='usb'> <source> <address bus='1' device='6'/> </source> </hostdev> __EOF__ - Run 'virsh attach-device {VMNAME} usb.xml' on a running VM. Hope that helps, Cole

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[libvirt] Networking with libvirt
by Andreas Rittershofer 23 Feb '09

23 Feb '09

I want to setup networking under KVM and with libvirt. I read a lot the last two days, but it is not working as desired. I don't want bridging, I want it with a tap-device created via vde_switch. I cannot figure out what to put in /etc/libvirt/qemu/machine.xml and /etc/ libvirt/qemu/networks/network.xml - there is no really good documentation. /var/log/libvirt/qemu/maschine.log shows a lot of parameters when I start the VM with virsh start machine, but I cannot figure out where to set these values or where to set the defaults. mfg ar -- Hier könnte keine Signatur stehen.

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[libvirt] update documentation
by jesse lauren farinacci 22 Feb '09

22 Feb '09

I hit a small snag when following the documentation, specifically the doc says to use <clock sync='localtime'/> when it should say <clock offset='localtime'/>.

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[libvirt] [PATCH] Fix bugzilla link in virsh man page
by Mark McLoughlin 22 Feb '09

22 Feb '09

Note, I haven't generated a new virsh.1 because Pod::Man 2.16 gives a bunch of warnings even with the existing version. Signed-off-by: Mark McLoughlin <markmc(a)redhat.com> --- docs/virsh.pod | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/virsh.pod b/docs/virsh.pod index 8b42ea0..58bba6b 100644 --- a/docs/virsh.pod +++ b/docs/virsh.pod @@ -540,9 +540,9 @@ L<virt-install(1)>, L<xm(1)>, L<virt-top(1)>, L<virt-mem(1)>, L<virt-df(1)>, L<h =head1 BUGS -Bugs can be view on the RedHat bugzilla page under the libvirt +Bugs can be filed in Red Hat bugzilla under the Virtualization Tools/libvirt L<https://bugzilla.redhat.com/> -L<https://bugzilla.redhat.com/bugzilla/buglist.cgi?product=Fedora+Core&compon…> +L<https://bugzilla.redhat.com/buglist.cgi?product=Virtualization+Tools&compon…> =end -- 1.6.0.6

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[libvirt] restore as init script
by Matthias Pfafferodt 21 Feb '09

21 Feb '09

Hello, first i'm using kvm-84 and libvirt 0.6.0 on opensuse 11.1. I try to use the attached script to save some domains on shutdown and restore them on host boot. The script also tries to cleanly shutdown all other domains. The save and shutdown part is working as expected but on system boot the restore of the saved domains fails. If I manually run 'rclibvirtdomains start' after a boot it needs 1 to 3 tries to restore the domain. After that I can run a stop/start cycle of libvirtdomains without problems. How can I debug this problem? After the system boot libvirt seems to have problems to connect to qemu/kvm. The log messages are for a failed start: --- start log --- LC_ALL=C PATH=/bin:/sbin:/usr/bin:/usr/sbin HOME=/ /usr/bin/qemu-kvm -S -M pc -m 1024 -smp 1 -name kvm-virt03 -uuid 864c0b59-705e-5d78-dc3e-1a9de7dd305f -monitor pty -pidfile /var/run/libvirt/qemu//kvm-virt03.pid -boot c -drive file=/dev/virtual/kvm_virt03,if=ide,index=0,boot=on -net nic,macaddr=00:16:3e:00:01:05,vlan=0,model=e1000 -net tap,fd=15,script=,vlan=0,ifname=vnet0 -serial none -parallel none -usb -vnc 192.168.110.78:0 -k de -soundhw es1370 -incoming exec:cat char device redirected to /dev/pts/6 qemu_popen: returning result of qemu_fopen_ops cat: write error: Broken pipe --- end log --- and for a successful start: --- start log --- LC_ALL=C PATH=/bin:/sbin:/usr/bin:/usr/sbin HOME=/ /usr/bin/qemu-kvm -S -M pc -m 1024 -smp 1 -name kvm-virt03 -uuid 864c0b59-705e-5d78-dc3e-1a9de7dd305f -monitor pty -pidfile /var/run/libvirt/qemu//kvm-virt03.pid -boot c -drive file=/dev/virtual/kvm_virt03,if=ide,index=0,boot=on -net nic,macaddr=00:16:3e:00:01:05,vlan=0,model=e1000 -net tap,fd=15,script=,vlan=0,ifname=vnet0 -serial none -parallel none -usb -vnc 192.168.110.78:0 -k de -soundhw es1370 -incoming exec:cat char device redirected to /dev/pts/6 qemu_popen: returning result of qemu_fopen_ops info cpus * CPU #0: pc=0xffffffff80221f1d thread_id=7398 cont --- end log --- Kind regards Matthias Pfafferodt -- Matthias Pfafferodt - http://www.mapfa.de Matthias.Pfafferodt <at> mapfa.de ## Path: System/Virtualization ## Description: libvirtd stop configuration ## Type: yesno ## Default: yes # # On 'libvirtd stop' all running domains are killed. If # LIBVIRTDOMAINS_SHUTDOWN is set to 'yes' all running vm's are given time # for a gracefully shutdown. # LIBVIRTDOMAINS_SHUTDOWN="yes" ## Path: System/Virtualization ## Description: libvirtd timeout ## Type: integer ## Default: 300 # # On 'libvirtd stop' the vm's are ask to shutdown. This optine gives the # maximum number of seconds the script will wait until libvirt is stopped. # LIBVIRTDOMAINS_SHUTDOWN_MAXWAIT=300 ## Path: System/Virtualization ## Description: should domains be saved ## Type: yesno ## Default: yes # # If set to yes domains are saved on shutdown and restored on boot. # LIBVIRTDOMAINS_SAVE="yes" ## Path: System/Virtualization ## Description: domains which should be save and restored ## Type: string ## Default: # # The listed vms are saved on shutdown and restored at boot time # LIBVIRTDOMAINS_SAVE_VM="kvm-virt03" ## Path: System/Virtualization ## Description: save path for domains ## Type: string ## Default: /var/lib/libvirtdomains/save # # Path there the domains should be saved # LIBVIRTDOMAINS_SAVE_DIR="/var/lib/libvirtdomains/save"

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