virt April 2011

virt@lists.fedoraproject.org

12 participants
15 discussions

Re: [fedora-virt] Routing to guests
by Robert Thiem 15 Jan '12

15 Jan '12

> From: Philip Rhoades > I can ssh from/to the host/guest OK but how do I set up a route (or > whatever is necessary) so that another machine: > eth0: 192.168.0.12 > can ssh to the guest? - "ssh 192.168.122.68" gives "no route to host" - > http://docs.fedoraproject.org/virtualization-guide/f12/en-US/html/ but > the problem does not seem to be covered there. Alexander is correct in saying that bridging would allow you to do that. There are two networking discussed in the guide. The first is a NAT (network address translation), in which the guests are given "private" ip addresses and any outbound traffic appears to be coming from the host machine's IP address. This is the same as the setup on your ADSL router where the internal network machines get addresses of 192.168.x.x but the internet sees your requests as coming from the IP address of your router. There should be lots of documentation in linux firewalling guides under sections on NAT (or possibly called IP Masquerading in some). Have a look at these for information on port forwarding to reveal services inside the virtual (such as ssh). The other option is bridging. This shares the physical network interface of the host with the guest. In this case the VM acts as though it's a machine plugged into the same subnet as the host, its services are accessible like those of the host and it's as vulnerable to attack as the host. Robert

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f15 guest with spice and gnome 3
by Gianluca Cecchi 02 May '11

02 May '11

Hello, I'm testing an F15 beta guest running on an F14+virt-preview host. Is it correct to say that as right now spice doesn't support 3d acceleration, then my guest will only be able to run gnome 3 in fallback mode? In this case is there any emulated video adapter to configure with which I can test f15 and gnome 3 in its new desktop layout? Thanks in advance, Gianluca

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info on resize support for virtio disk
by Gianluca Cecchi 30 Apr '11

30 Apr '11

hello, I'm using F14+virt-preview repo and I have an f15 guest configured with a virtio disk. I'm trying online resize support for guest disk if in place. So my disk is vda in guest and in guest xml I have: <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/f15_001.img'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </disk> I extend the disk with qemu-img at host side: qemu-img resize /var/lib/libvirt/images/f15_001.img +1G In guest neither partprobe nor kpartx show any change... I put the xml definition in disk.xml and try to update device from libvirt point of view (my domain id is 4): [root ~]# virsh update-device 4 disk.xml error: Failed to update device from disk.xml error: unsupported configuration: disk bus 'virtio' cannot be updated. Any confirmation of this? Teorically qemu/monitor should support block_resize command for virtio devices too in qemu 0.14.... Is this true but functionality not ported to virsh command yet or other kind of things? Thanks for clarifications Gianluca

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fedora virt versus RHEV - libvirt tools availability
by Dale Bewley 30 Apr '11

30 Apr '11

I hope this doesn't seem too far off topic. In my current position we are a vmware shop. With a few dozen machines in a handful of clusters, multipath fibrechannel storage, lots of live migrations, etc. In my past position, I did everything on Fedora with the help of virsh, guestfish and all their friends, and life was very good. I could provision machines with virt-install and koan. I could tweak the machine definitions in XML. I could login and get a vm console very easy. That environment was much smaller and all storage was essentially direct attached and there was no live migration. Moving to vmware has a few niceties, but feels encumbered. I now want to evaluate RHEV against vmware, but I'm immediately taken aback to see the need for a windows mgt console, and troubled by an apparent burying of the libvirt API with a user push towards a REST API. Maybe my perception is off. I'm going to RH Summit and will get some more education next week. Tools like guestfish and virsh are some of the drivers causing me to explore vmware alternatives. If RHEV occludes those tools I'm left wondering what do I get that I can't get from Fedora with an apparently more open toolset. Other than the long term support. What are others doing out there? How large have you scaled up a Fedora solution (libvirt, virt-manager, virsh, kvm)? Are you performing live migrations reliably? How do you feel about RHEV? Anyone coming to RH Summit?

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Fedora Virt Status
by Justin Forbes 26 Apr '11

26 Apr '11

Fedora 14 - We have 95 open bugs, 5 of which have fixes in awaiting updates. - 17 bugs have been closed in the last week Fedora 15 - We have 22 open bugs. - 9 bugs have been closed in the last week - Beta is released, go test! - Upcoming Dates of importance: 2011-05-09 Final Change Deadline 2011-05-10 Compose 'Final' RC 2011-05-24 Fedora 15 Final Release == Updates Needing review == The following packages are in updates-testing and need review and karma as appropriate: F14: - libguestfs-1.8.6-1.fc14 New stable version 1.8.6 - spice-protocol-0.8.0-1.fc14 Add support for copy and paste using the primary selection, to use this you need a spice-gtk widget based client and the latest spice-gtk code Various small bug fixes F15: - libguestfs-1.10.2-1.fc15 New upstream stable version 1.10.2. == Virt Preview Repository == The virt-preview repository is now active for F14 users wishing to run the latest F15 virt packages on their stable F14 systems. F13 virt-preview users will still get the latest F14 packages. For details on how to run enable virt-preview, please see: https://fedoraproject.org/wiki/Virtualization_Preview_Repository == Bugs of importance: == - 674530 Change CDROM of guest, new CD is truncated to the size of the old Installing a very old guest which requires several CDs, the CD size is truncated to the size of the first CD. This could be a bug in the guest kernel, but needs to be investigated to ensure that it is not a hypervisor issue. - 693530 Qemu does the wrong thing with Cache=None and looks like corruption btrfs complains about corruption when Windows guests do certain types of writes with cache=none.

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Testcase Virtualization Attach/Detach a SCSI device to guest
by Gianluca Cecchi 19 Apr '11

19 Apr '11

Hello, with my F14+virt-preview repo and a CentOS 5.5 vm currently using virtio devices, I'm not able to attach a scsi disk with virsh: [root ~]# virsh attach-device c55ms /tmp/disk.xml error: Failed to attach device from /tmp/disk.xml error: internal error unable to execute QEMU command 'drive_add': The command drive_add has not been found Is this expected because the features between my system and current rawhide are different? I have qemu-kvm-0.14.0-7.fc14.x86_64 Or do I have to open a bug for this if not already open? The same error trying to add from virt-manager: Are you sure you want to add this device? This device could not be attached to the running machine. Would you like to make the device available after the next VM shutdown? internal error unable to execute QEMU command 'drive_add': The command drive_add has not been found Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/addhardware.py", line 927, in add_device self.vm.attach_device(self._dev) File "/usr/share/virt-manager/virtManager/domain.py", line 1240, in attach_device self._backend.attachDevice(devxml) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 263, in attachDevice if ret == -1: raise libvirtError ('virDomainAttachDevice() failed', dom=self) libvirtError: internal error unable to execute QEMU command 'drive_add': The command drive_add has not been found BTW: I know that in RH EL 6 it's not possible to define and use scsi disks for Qemu/KVM guests (because related source parts not kept much in sync with upstream patches and poor performance generally, if I understood correctly) I see now that between testcases for Fedora Virt test day there is this one for scsi disks. The question is: what is the expected situation in F15 for scsi disks for guests in terms of performance and reliability? Does it matter the format to be used with them? Thanks, Gianluca

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Fwd: virt-preview: libguestfs requires glibc not in F14
by sean darcy 15 Apr '11

15 Apr '11

---------- Forwarded message ---------- From: sean darcy <seandarcy2(a)gmail.com> Date: Thu, Apr 14, 2011 at 9:46 PM Subject: Re: [fedora-virt] virt-preview: libguestfs requires glibc not in F14 To: "Richard W.M. Jones" <rjones(a)redhat.com> On Thu, Apr 14, 2011 at 4:42 AM, Richard W.M. Jones <rjones(a)redhat.com> wrote: > On Wed, Apr 13, 2011 at 07:19:21PM -0400, sean darcy wrote: >> From the spec file: >> >> # Because many previously unreadable binaries have been made readable >> # (because of RHBZ#646469) they will be included in the hostfiles >> # list, which means that this libguestfs won't work with versions of >> # glibc built before the change. >> Requires: glibc >= 2.13.90-4 >> >> This implies that even if I build it with glibc-2.13.0, it still won't work. > > Maybe the comment is badly worded, but the problem is not that you > can't build against particular glibc. It is that if you build with > glibc < 2.13.90-4 then you must install with glibc < 2.13.90-4, and > conversely if you build with glibc >= 2.13.90-4 then you must install > with glibc >= 2.13.90-4. There is no way to express this using RPM > dependencies. > > Rich. > > -- > Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones > virt-df lists disk usage of guests without needing to install any > software inside the virtual machine. Supports Linux and Windows. > http://et.redhat.com/~rjones/virt-df/ > Gotcha. OK, I'll get the src.rpm, build it against the F14 glibc, and, hopefully, Bob's your uncle. Not that I know anything about the Fedora/Red Hat infrastructure, if you're doing a koji F14 build, wouldn't it be built against F14 glibc? Thanks, Sean

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Fedora 15 Virtualization Test Day -- Thu. April 14th
by Justin Forbes 14 Apr '11

14 Apr '11

This is just a reminder that today, April 14 is Fedora Virtualization test day. Test plans and more information for the event can be found on the Fedora Project Wiki at: https://fedoraproject.org/wiki/Test_Day:2011-04-14_Virtualization IRC for the event on freenode in #fedora-test-day. Please come lend a hand, we can use as many testers as possible. If you cannot make it on Thursday, please feel free to run through test plans as you have time,the feedback is still relevant and helps to make Fedora a better platform for virtualization. Thanks, Justin

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virt-preview: libguestfs requires glibc not in F14
by sean darcy 14 Apr '11

14 Apr '11

yum upgrade ........... Error: Package: 1:libguestfs-1.9.14-1.fc14.x86_64 (fedora-virt-preview) Requires: glibc >= 2.13.90-4 Installed: glibc-2.13-1.i686 (@updates) glibc = 2.13-1 Available: glibc-2.12.90-17.i686 (fedora) glibc = 2.12.90-17 rpm -q glibc glibc-2.13-1.x86_64 glibc-2.13-1.i686 sean

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Fedora Virt Test day is coming up in 2 days!
by Justin Forbes 13 Apr '11

13 Apr '11

This is just a reminder that Thursday, April 14 is Fedora Virtualization test day. Test plans and more information for the event can be found on the Fedora Project Wiki at: https://fedoraproject.org/wiki/Test_Day:2011-04-14_Virtualization IRC for the event on freenode in #fedora-test-day. Please come lend a hand, we can use as many testers as possible. If you cannot make it on Thursday, please feel free to run through test plans as you have time,the feedback is still relevant and helps to make Fedora a better platform for virtualization. Thanks, Justin

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virt April 2011