virt July 2009

virt@lists.fedoraproject.org

39 participants
66 discussions

Addendum to USB issues
by Paul Lambert 11 Jul '09

11 Jul '09

Should have included this in the first Email. Below is the boolean output of getsebool. Note that the qemu_use fields do have permission to access USB but there is no USB entry for the virt though there is for other virt_fields. I am running the Looks to me some migration leftovers from qemu to qemu-kvm. Since I do not have the virt_use_usb selinux field I do need the most recent update that includes this. I am running: [root@BRSINC-VC01 EB30750]# uname -a Linux BRSINC-VC01.Local 2.6.29.5-191.fc11.i586 #1 SMP Tue Jun 16 23:11:39 EDT 2009 i686 athlon i386 GNU/Linux [root@BRSINC-VC01 EB30750]# getsebool -a allow_console_login --> off allow_cvs_read_shadow --> off allow_daemons_dump_core --> on allow_daemons_use_tty --> on allow_domain_fd_use --> on allow_execheap --> off allow_execmem --> off allow_execmod --> off allow_execstack --> on allow_ftpd_anon_write --> off allow_ftpd_full_access --> off allow_ftpd_use_cifs --> off allow_ftpd_use_nfs --> off allow_gssd_read_tmp --> on allow_guest_exec_content --> off allow_httpd_anon_write --> off allow_httpd_mod_auth_ntlm_winbind --> off allow_httpd_mod_auth_pam --> off allow_httpd_sys_script_anon_write --> off allow_java_execstack --> off allow_kerberos --> on allow_mount_anyfile --> on allow_mplayer_execstack --> off allow_nfsd_anon_write --> off allow_nsplugin_execmem --> on allow_polyinstantiation --> off allow_postfix_local_write_mail_spool --> on allow_ptrace --> off allow_rsync_anon_write --> off allow_saslauthd_read_shadow --> off allow_smbd_anon_write --> off allow_ssh_keysign --> off allow_staff_exec_content --> on allow_sysadm_exec_content --> on allow_unconfined_mmap_low --> off allow_unconfined_nsplugin_transition --> off allow_unconfined_qemu_transition --> off allow_user_exec_content --> on allow_user_postgresql_connect --> off allow_write_xshm --> off allow_xguest_exec_content --> off allow_xserver_execmem --> on allow_ypbind --> off allow_zebra_write_config --> on cdrecord_read_content --> off cron_can_relabel --> off exim_can_connect_db --> off exim_manage_user_files --> off exim_read_user_files --> off fcron_crond --> off ftp_home_dir --> off ftpd_connect_db --> off global_ssp --> off gpg_agent_env_file --> off httpd_builtin_scripting --> on httpd_can_network_connect --> off httpd_can_network_connect_db --> off httpd_can_network_relay --> off httpd_can_sendmail --> off httpd_dbus_avahi --> on httpd_enable_cgi --> on httpd_enable_ftp_server --> off httpd_enable_homedirs --> on httpd_execmem --> off httpd_ssi_exec --> off httpd_tty_comm --> on httpd_unified --> on httpd_use_cifs --> off httpd_use_nfs --> off init_upstart --> on mozilla_read_content --> off named_write_master_zones --> off nfs_export_all_ro --> on nfs_export_all_rw --> on nsplugin_can_network --> on openvpn_enable_homedirs --> off pppd_can_insmod --> off pppd_for_user --> off privoxy_connect_any --> off pulseaudio_network --> off qemu_full_network --> on qemu_use_cifs --> on qemu_use_comm --> off qemu_use_nfs --> on qemu_use_usb --> on read_default_t --> on rsync_client --> off rsync_export_all_ro --> off samba_create_home_dirs --> off samba_domain_controller --> off samba_enable_home_dirs --> off samba_export_all_ro --> off samba_export_all_rw --> off samba_run_unconfined --> on samba_share_fusefs --> off samba_share_nfs --> off secure_mode --> off secure_mode_insmod --> off secure_mode_policyload --> off sepgsql_enable_users_ddl --> on spamassassin_can_network --> off spamd_enable_home_dirs --> on squid_connect_any --> off ssh_sysadm_login --> off tftp_anon_write --> off unconfined_login --> on use_lpd_server --> off use_nfs_home_dirs --> on use_samba_home_dirs --> off user_direct_mouse --> off user_ping --> on user_rw_noexattrfile --> on user_tcp_server --> off user_ttyfile_stat --> off varnishd_connect_any --> off virt_manage_sysfs --> off virt_use_comm --> off virt_use_nfs --> off virt_use_samba --> off webadm_manage_user_files --> off webadm_read_user_files --> off xdm_sysadm_login --> off xen_use_nfs --> off xguest_connect_network --> on xguest_mount_media --> on xguest_use_bluetooth --> on xserver_object_manager --> off

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pv_ops dom0 kernel RPM, configuration & setup help anyone?
by Lester M. 08 Jul '09

08 Jul '09

I downloaded the following rpms from M. Youngs fedora-people page. ( http://fedorapeople.org/~myoung/dom0/) kernel-firmware-2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.noarch.rpm kernel-headers-2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.i586.rpm kernel-PAE-2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.i686.rpm kernel-PAE-devel-2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.i686.rpm I am interested in *Testing* under the understanding that this is in beta. My question is, after installation of the rpms, what configuration (config files, grub, et al) is needed to successfully boot into dom0? I recall there were a few hoops to jump through to get a working dom0. I also have compiled the xen3.4 tools (hg clone http://xenbits.xensource.com/xen-3.4-testing.hg) Could somebody please post a workflow for getting this running? I have installed the rpms and I am now like "Now what?" :-P

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New mailing list for libguestfs/guestfish/virt-inspector discussion/development
by Richard W.M. Jones 08 Jul '09

08 Jul '09

http://www.redhat.com/mailman/listinfo/libguestfs I'll be updating the website with the new details shortly. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://et.redhat.com/~rjones/virt-top

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Invalid configuration unexpected EOF when using -x
by Ray Van Dolson 07 Jul '09

07 Jul '09

Hi all; Trying to deploy a CentOS 5 domU under RHEL 5.3 64-bit and am running into the following error: virDomainCreateLinux() failed POST operation failed: (xend.err 'Invalid configuration unexpected EOF') Domain installation may not have been successful. If it was, you can restart your domain by running 'virsh start cobbler'; otherwise, please restart your installation. Tue, 07 Jul 2009 10:59:38 ERROR virDomainCreateLinux() failed POST operation failed: (xend.err 'Invalid configuration unexpected EOF') Traceback (most recent call last): File "/usr/sbin/virt-install", line 560, in ? main() File "/usr/sbin/virt-install", line 492, in main dom = guest.start_install(conscb, progresscb, wait=(not wait)) File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 822, in start_install return self._do_install(consolecb, meter, wait) File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 843, in _do_install self.domain = self.conn.createLinux(install_xml, 0) File "/usr/lib64/python2.4/site-packages/libvirt.py", line 573, in createLinux if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self) libvirtError: virDomainCreateLinux() failed POST operation failed: (xend.err 'Invalid configuration unexpected EOF') This only seems to happen when I pass my virt-install command as follows: virt-install --name cobbler --ram 1024 --file=/ludlow2/cobbler.img \ --vnc --vcpus=2 --nonsparse -w bridge:xenbr0 -l \ http://yummie.esri.com/mrepo/centos5-x86_64/os/ \ -x "updates=http://yummie.esri.com/updates/updates-el5.1.img ks=http://yummie/ks/ks.php?arch=x86_64&distro=centos&major=5&minor=2" \ --os-type=linux -d The error appears to be triggered by my kickstart URL location which includes ampersands and such -- despite the fact that I am include quotes around the entire argument. The debug output indicates that the XML is being written with the ampersand changed into &. If I change my kickstart location to a URL without the GET variables, everything works fine. Bug? Expected behavior? Workaround? Perhaps this is an issue in virt-install and wouldn't happen if I crafted the XML file myself? python-virtinst-0.300.2-12.el5 Thanks, Ray

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Re: febootstrap question
by Richard W.M. Jones 07 Jul '09

07 Jul '09

[CC'd to fedora-virt] On Wed, Jun 17, 2009 at 05:25:26PM -0400, Christopher Johnston wrote: > I had a question about febootstrap and a specific > use case of mine at my company where I am implementing a stateless solution > for our grid. I wanted to be able to take the initramfs image that is spun > up out of febootstrap and put a custom linuxrc in there which will > essentially take the contents of the initramfs and copy them directly into a > tmpfs filesystem thats mounted as /sysroot then do a pivot_root into it and > then do a full execution of init. I'm a bit confused why you'd want to do this, but maybe I'm missing something. Why copy the initramfs image into a tmpfs? The initramfs is already loaded into kernel memory at boot time and so it has all the same properties / benefits of tmpfs. > I have been using nash currently to do > this and I have ran into a few issue when the system boots up once init > forks off where it segfaults. Below is my custom linuxrc: I would tend to avoid using nash. If it's possible to add bash to the image, just use bash. You might find it helpful to look at what we do in libguestfs, here: http://git.et.redhat.com/?p=libguestfs.git;a=blob;f=appliance/make.sh.in;hb… > #!/sbin/nash > > mount -t proc /proc /proc > echo Mounting proc filesystem > echo Mounting sysfs filesystem > mount -t sysfs /sys /sys > echo Creating /dev > mount -o mode=0755 -t tmpfs /dev /dev > mkdir /dev/pts > mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts > mkdir /dev/shm > mkdir /dev/mapper > echo Creating initial device nodes > mknod /dev/null c 1 3 > mknod /dev/zero c 1 5 > mknod /dev/systty c 4 0 > mknod /dev/tty c 5 0 > mknod /dev/console c 5 1 > mknod /dev/ptmx c 5 2 > mknod /dev/fb c 29 0 > mknod /dev/tty0 c 4 0 > mknod /dev/tty1 c 4 1 > mknod /dev/tty12 c 4 12 > mknod /dev/ttyS0 c 4 64 > mknod /dev/ttyS1 c 4 65 > mknod /dev/ttyS2 c 4 66 > mknod /dev/ttyS3 c 4 67 > /lib/udev/console_init tty0 > mkchardevs > mkblkdevs > echo Creating tmpfs filesystem > mkdir -p /sysroot > mkrootdev -t tmpfs -o defaults,ro /dev/root > mount -o mode=0755 -t tmpfs /dev/root /sysroot > mkdir -p /sysroot/proc > mkdir -p /sysroot/sys > mkdir -p /sysroot/.oldroot > echo Copying rootfs->tmpfs > cp -a bin /sysroot > cp -a dev /sysroot > cp -a etc /sysroot > cp -a home /sysroot > cp -a lib /sysroot > cp -a lib64 /sysroot > cp -a mnt /sysroot > cp -a sbin /sysroot > cp -a tmp /sysroot > cp -a usr /sysroot > cp -a var /sysroot > cp -a root /sysroot > echo Setting up the new root tmpfs filesystem > setuproot > echo Switching from rootfs to tmpfs > switchroot > > -Chris Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.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/

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Fedora XenPvopsDom0 wiki page updated
by Pasi Kärkkäinen 06 Jul '09

06 Jul '09

Hello. I just updated Fedora XenPvopsDom0 wiki page: https://fedoraproject.org/wiki/Features/XenPvopsDom0 I added a link to pv_ops dom0 kernel testing RPMs by M A Young, link to upstream XenDom0Kernels wiki page and also a link to recent pv_ops dom0 status email. -- Pasi

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vmware guest -> Fedora-virt guest
by Gene Czarcinski 06 Jul '09

06 Jul '09

Does anyone know if it is possible to "convert" a VMware guest to be a Fedora- virtualization guest? I first tried with Win2k. I know that Win2k basically works becasue I did a fresh install onto a virtual IDE disk. But, my Vmware guest uses a SCSI disk. Could not get it to work. OK, so lets try something simpler: Fedora 9. Rather than going the whole way, lets just see if I can get the disk to be recognized. So, define a new guest with a IDE virtual disk and a Fedora 9 install disk ISO image. Boot up into rescue mode. 1. First, add a new storage SCSI device and use the vmdk file from VMware ... nope, no good partition table. 2. Next, convert the vmdk file to raw using qemu-img and use this raw image for a new storage SCSI device ... still did not work ... no good partition table (fdisk -l). What am I doing wrong? Does anyone know if the SCSI device support works? GEne

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Disk device performance in F11
by Jerry James 06 Jul '09

06 Jul '09

I'm having a problem with a virtual machine created on an F-11 host that I didn't have with an F-10 host, and I'm wondering if I've misconfigured something or missed a trick somewhere. I'm doing some custom Linux kernel work for my employer, and I'm using a small collection of virtual machines to test it. In the short time I've had F-11 on my host machine, I've seen that virtual disk performance is noticeably worse than it was with F-10. My virtual machines regularly spew soft lockup messages to the system log, always with backtraces that show the process is being starved of the disk. The tests put a lot of stress on the disk, because this custom kernel work is going to help some overloaded servers deal with the load. It's actually working pretty well on the real machines with real disks, but with the upgrade to F-11, my test VMs have become almost useless for testing further development work. Before I take the drastic step of rolling back to F-10, what factors affect the virtual disk performance? I created both the F-10 and F-11 machines with virt-manager, if that matters. Thanks, -- Jerry James http://www.jamezone.org/

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Updated libguestfs Debian packages
by Guido Günther 04 Jul '09

04 Jul '09

Hi, I've uploaded a new versions of the libguestfs Debian packages to alioth. Please see: http://wiki.debian.org/Teams/DebianLibvirtTeam#Packages for download instructions. Changes are: * ship virt-inspect in the guestfish package * speedup appliance startup by almost a factor of two * fix augeas support in the appliance (which I broke previously) * allow to build on amd64 Many thanks to Richard for applying the patches upstream so quickly! Cheers, -- Guido

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Fedora virt status
by Mark McLoughlin 03 Jul '09

03 Jul '09

F-12 ==== F-12 is still coming at us fast: http://fedoraproject.org/wiki/Releases/12/Schedule 2009-07-28 Feature Freeze (26 days) 2009-09-22 Beta (Final Development) Free (82 days) 2009-10-20 Final Release Compose (110 days) libguestfs ========== Much libguestfs activity has continued on fedora-virt(a)redhat.com lately and Rich Jones has posted two related F-12 feature pages: https://fedoraproject.org/wiki/Features/libguestfs https://fedoraproject.org/wiki/Features/Xen_to_KVM_migration FWN === Yet another weekly installment from Dale Bewley: https://fedoraproject.org/wiki/FWN/Issue182#Virtualization libvirt-0.6.5 ============= The libvirt folks have released another version of libvirt: http://www.redhat.com/archives/libvir-list/2009-July/msg00060.html This is mostly a bug fix release, though it includes some serious improvements for storage/NPIV and on the OpenNebula driver: * New features - create storage columes on disk backend (Henrik Persson) - drop of capabilities based on libcap-ng when possible (Daniel Berrange) qemu-fedora.git =============== git is now being used to manage Fedora's qemu patches: http://www.redhat.com/archives/fedora-virt/2009-June/msg00157.html Glauber and I are going to start using git to manage the patches for the qemu package. The idea is that we'll use git's magical powers to make it easier for us to fix problems in patches, cherry-pick patches from upstream, re-base our patches to a newer upstream, etc. http://git.et.redhat.com/?p=qemu-fedora.git Already, this has proved useful re-basing to the latest qemu-kvm-0.10.50 snapshot (kvm-87). F-11 virtio-blk Performance =========================== Charles Duffy, Michael Tokarev, Rich Jones and others recently stumbled across the apparent cause of a dramatic slowdown in virtio-blk performance in F-11 guests: https://bugzilla.redhat.com/509383 Thanks for Michael Tokarev and Charles Duffy for the following suggestion which has mostly fixed this problem: for f in /sys/block/vd*/queue/rotational; do echo 1 > $f; done It seems the kernel folks deemed it prudent to turn KVM and Xen paravirt disks into "non-rotational" disks in 2.6.29, thereby preventing guests from attempting to optimize block I/O and, instead, leaving it up to the host: http://lkml.org/lkml/2008/10/27/84 No doubt there'll be more on this as people look deeper into the issue. KVM USB Passthrough =================== A discussion at FUDCon lead to some tips on USB passthrough being posted to the fedora-virt list: http://www.redhat.com/archives/fedora-virt/2009-June/msg00182.html "KVM, enabling iPhone-touting geeks everywhere to use iTunes" :-) Wiki ==== Dan Berrange has pulled together a couple of new wiki pages which people might find interesting. The first outlines the history of virt in Fedora, with details of what changes were made in each release: https://fedoraproject.org/wiki/Virtualization/History The second pulls together links to all the virt status reports and FWN virt sections: https://fedoraproject.org/wiki/Virtualization/News Xen === Michael Young posted more Dom0 kernel builds here: http://www.redhat.com/archives/fedora-virt/2009-June/msg00205.html Michael also pointed out Jeremy Fitzhardinge's latest prognosis of getting the dom0 patches merged upstream: http://lists.xensource.com/archives/html/xen-devel/2009-06/msg01193.html For now I've backed off putting anything much into the current merge window, or even the next, in favour of getting the tree into good shape for Xen users and working out what needs to happen to get a solid set of upstreamable patches. Bugs ==== DOOM-O-METER: 242 open bugs a couple of weeks ago, 250 now = New = == kvm == https://bugzilla.redhat.com/508801 kvm "emulation failed (pagetable)" during OpenBSD 4.6-beta guest boot (OOS shadow bug?) It looks like this OpenBSD guest boot failure on F-11 might be due to an OOS shadow bug but, then again, that should have been fixed in 2.6.29.3. https://bugzilla.redhat.com/509383 mkfs.ext2 much slower with virtio-backed disks than with IDE-backed disks (NOT sparseness issue) The problem here seems to be that virtio_blk is now defaulting to non-rotational mode since 2.6.29. This may also be the cause of bug #505695 and bug #504376. == qemu == https://bugzilla.redhat.com/507899 qemu's console-via-VNC generates invalid rect position(s) qemu's VNC server sends bogus rectangle sizes causing vncviewer to abort. https://bugzilla.redhat.com/507834 Clock drift in RHEL5.3 KVM Guests on Heavily Loaded Servers A report of x86_64 RHEL5 guests time drifting under KVM with the jiffies clocksource. Suggestion to boot with "notsc divider=10". Macelo also suggests "clock=tsc" or "clock=jiffies" with -no-kvm-pit-reinjection. https://bugzilla.redhat.com/508258 qemu init script does nothing useful by default The qemu initscript for registering binary handlers for the usermode emulators does nothing unless you obtain the runtime environment for the emulator from somewhere else. This is lame. https://bugzilla.redhat.com/509532 Move /usr/bin/qemu-kvm into the qemu-kvm package A minor packaging change we should make for F-12. == libvirt == https://bugzilla.redhat.com/508645 libvirt should use qemu's autoconnect mode for USB device passthrough qemu has a nice autoconnect mode for USB passthrough which libvirt should probably use by default. Dan suggests that it should only be used with managed='yes'. https://bugzilla.redhat.com/508317 Allow sound devices to be used with svirt - tunnel sound over VNC Covers the fact that with svirt we now disable sound cards until we can tunnel sound over VNC. https://bugzilla.redhat.com/509458 libvirtd default virtual network should not be enabled when libvirt installed in a guest This issue has been known for a while now - if you install libvirtd in a guest, the default network is enabled and since it's using the same IP range as the default network in the host, things get screwed up. Suggestions on how to avoid having libvirtd or the default network enabled by default in guest installs welcome :-) == virt-manager= https://bugzilla.redhat.com/508665 virt-manager (running as unprivileged user) doesn't let me install from NFS locations Because virt-manager no longer runs as root, NFS installs don't work. Suggestion is that we'll use PolicyKit to allow virt-manager to do NFS mounts. == virt-top == https://bugzilla.redhat.com/508197 virt-top segfaults if run in Japanese Now there's a bug that's right up Rich's alley! = Resolved = == qemu == https://bugzilla.redhat.com/508326 Force use of /sys/bus/usb for all USB host devices qemu is currently prefering to use usbfs instead of sysfs for USB passthrough. Fix sent upstream and built in rawhide. https://bugzilla.redhat.com/506170 removing virtualization packages leaves qemu-system-x86 This is NOTABUG - if 'yum groupinstall' pulls in packages via dependencies, then 'yum groupremove' doesn't remove them again. == libvirt == https://bugzilla.redhat.com/506590 libvirt should ignore NUMA cells with missing topology The libvirt fix for this was committed upstream but a recent F-11 numactl update is enough to fix the original issue for the reported, so this has been marked as fixed upstream. https://bugzilla.redhat.com/507555 libvirt starting a guest with ISO on NFS mount fails when unnecessarily setting SELinux file context Patch from Tim Waugh sent upstream and included in libvirt-0.6.2-13.fc11 F-11 update. https://bugzilla.redhat.com/505625 libvirtd segfault during virsh dominfo on security model This libvirtd segfault which occurs when you do "virsh capabilities" followed by "virsh dominfo" is fix in the libvirt-0.6.2-13.fc11 F-11 update. https://bugzilla.redhat.com/493692 Creating new VM; SELinux prevents opening iso image of install media https://bugzilla.redhat.com/499569 Guest with source-less cdrom fails to start :: Failed to set security label Two patches which we included in F-11, but neglected to send upstream and were then dropped accidentally when we rebased to 0.6.4. All sorted out again now for F-12. == virt-viewer == https://bugzilla.redhat.com/508825 virt-viewer doesnt have "full screen" hot key It seems sensible that we would hook up F11 for fullscreen and have virt-manager handle it, rather than passing F11 through to the guest. Dan thinks this is a dumb idea, so the bug is closed as WONTFIX.

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virt July 2009