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1608 discussions

Error doing PCI passthrough on CentOS 7.2
by C. L. Martinez 13 Sep '16

13 Sep '16

Hi all, I am trying to configure a kvm guest using pci passthrough to pass it a wireless pci adapter (host is my personal laptop). But when I try to start it: error: Failed to start domain obsdfw error: unsupported configuration: host doesn't support passthrough of host PCI devices PCI passthrough is enabled: [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.10.0-327.28.3.el7.x86_64 root=UUID=48220e4e-228c-42d9-a0af-482c2fc7c008 ro crashkernel=auto rhgb quiet intel_iommu=on [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-3.10.0-327.28.3.el7.x86_64 root=UUID=48220e4e-228c-42d9-a0af-482c2fc7c008 ro crashkernel=auto rhgb quiet intel_iommu=on And supported according dmesg output: root@lapdev01# dmesg | grep IOM [ 0.000000] Intel-IOMMU: enabled As you can see in the following output, VT-d extensions are supported also: root@lapdev01:~# cat /proc/cpuinfo | grep vmx flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt CPU is a Intel(R) Core(TM) i5-4200U CPU @ 1.60GHz (fam: 06, model: 45, stepping: 01), Westmere. Then, where is the problem?? I don't understand what I am doing wrong. CentOS is 7.2 release fully patched using qemu package from virt repo: qemu-kvm-ev-2.3.0-31.el7.16.1.x86_64 qemu-kvm-common-ev-2.3.0-31.el7.16.1.x86_64 qemu-img-ev-2.3.0-31.el7.16.1.x86_64 Thanks. -- Greetings, C. L. Martinez

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xen 4.6.3-2 packages (with XSAs 185-188) making their way through CBS
by George Dunlap 10 Sep '16

10 Sep '16

Just a heads-up -- 4.6.3-2, for both CentOS 7 and CentOS 6, are making their way through the build system now and should be in the mirrors hopefully sometime later this afternoon. These contain patches for XSAs 185-188, one of which is a fairly critical update, so please update as soon as they're available. -George

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No network using qemu-kvm-ev-2.3.0-31.el7.16.1
by C. L. Martinez 30 Aug '16

30 Aug '16

Hi all, To do some tests, I have installed a new CentOS7 host (fully patched) using qemu-kvm-ev-2.3.0-31.el7.16.1 instead of qemu-kvm's default package. And I have problems with network inside my guests. All guests can ping to CentOS host but nothing more: can't resolv dns names, can access via tcp to other hosts, etc ... Using same config on other CentOS7 host, but using default qemu-kvm package instead of qemu-kvm-ev-2.3.0-31.el7.16.1, all works ok. What am I doing wrong? Or is it a bug? Thanks -- Greetings, C. L. Martinez

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Re: [CentOS-virt] No network using qemu-kvm-ev-2.3.0-31.el7.16.1
by C. L. Martinez 28 Aug '16

28 Aug '16

Ok, problem is not with qemu-kvm-ev-2.3.0-31.el7.16.1 package, it is with systemd-networkd. I have installed openvswitch and all works ok. Then, my question, is why is it not possible to use systemd-networkd for configure virtual switches to use them with KVM guests in CentOS 7 (using for other things, they seem work ok)?? In Ubuntu, Arch and Debian there is no problem with systemd-networkd configured bridges for KVM guests. Any idea why ?? Thanks. -- Greetings, C. L. Martinez

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dracut-initqueue timeout with virt-install... but it works (kinda?)
by Matthew Crocker 25 Aug '16

25 Aug '16

Hello, I’m using virt-install to build a guest system with CentOS. The system boots up, times out with dracut-initqueue timeout and drops me into an emergency shell. If I exit the shell the install continues and I get a working machine. Any ideas? virt-install \ -n TEST \ -r 8192 \ --os-type=linux \ --disk=/vm-images/test.img,device=disk,bus=virtio,size=100,format=raw \ --ram=8192 \ --network bridge:br77 \ --location /home/CentOS-7-x86_64-Minimal-1511.iso \ --initrd-inject=/home/kickstart.cfg \ --extra-args="ks=file:/kickstart.cfg" \ --debug \ --accelerate kickstart.cfg: text install cdrom lang en_US.UTF-8 keyboard us network --onboot yes --device eth0 --bootproto dhcp --noipv6 rootpw testing123 firewall --service=ssh authconfig --enableshadow --passalgo=sha512 selinux --disable timezone --utc America/New_York bootloader --location=mbr zerombr clearpart --all --initlabel autopart reboot %packages --nobase @core %end — Matthew Crocker President - Crocker Communications, Inc. Managing Partner - Crocker Telecommunications, LLC E: matthew(a)corp.crocker.com E: matthew(a)crocker.com

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Re: [CentOS-virt] how to enable auto-start on newer versions of Xen ?
by Craig Thompson 24 Aug '16

24 Aug '16

PJ, I didn't have virsh installed (libvirt-client). After having installed it, it still didn't see the process: virsh autostart testvm error: failed to connect to the hypervisor error: no valid connection error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory Then, after having installed libvirt, it gives essentially the same error. I was thinking that in iterations past, it was possible just to run the hypervisor, put a symlink in /etc/xen/auto, and VMs would be auto-started upon reboot. Maybe I'm wrong, and maybe those older boxes had libvirt installed on them, too. If I need to install libvirt, what does this mean overall? What am I changing? What other process needs to run or be started upon boot on a CentOS 7.x box? Thanks. -- Craig Thompson, President Caldwell Global Communications, Inc. -----Original message----- From: PJ Welsh <pjwelsh(a)gmail.com> Sent: Monday 15th August 2016 17:05 To: Discussion about the virtualization on CentOS <centos-virt(a)centos.org> Subject: Re: [CentOS-virt] how to enable auto-start on newer versions of Xen ? Try, "virsh autostart VMNAME" pjwelsh On Mon, Aug 15, 2016 at 2:54 PM, Craig Thompson <president(a)caldwellglobal.com <mailto:president@caldwellglobal.com> > wrote: Hello, In days past, all I had to do was create /etc/xen/auto and put a symlink in there to the config file for each VM I wanted to have started automatically. Since updating to 4.6, this doesn't work. Period. I'm having a hard time finding what needs to change in order to get VMs to auto start on reboot of a server. Can someone please point me to documentation that I have missed or share the gold nugget? -- Craig Thompson, President Caldwell Global Communications, Inc. _______________________________________________ CentOS-virt mailing list CentOS-virt(a)centos.org <mailto:CentOS-virt@centos.org> https://lists.centos.org/mailman/listinfo/centos-virt _______________________________________________ CentOS-virt mailing list CentOS-virt(a)centos.org https://lists.centos.org/mailman/listinfo/centos-virt

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Nested KVM issue
by Laurentiu Soica 23 Aug '16

23 Aug '16

Hello, I have an OpenStack setup in virtual environment on CentOS 7. The baremetal has *nested KVM* enabled and 1 compute node as a VM. Inside the compute node I have multiple VMs running. After about every 3 days the VMs get inaccessible and the compute node reports high CPU usage. The qemu-kvm process for each VM inside the compute node reports full CPU usage. Please help me with some hints to debug this issue. Thanks, Laurentiu

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Updating PXE documentation for CentOS wiki
by Nico Kadel-Garcia 20 Aug '16

20 Aug '16

I was just looking at the CentOS Wiki at https://wiki.centos.org/HowTos/PXE/PXE_Setup, and it's pretty seriously out of date. It neglects the existence of the "syslinux-tftpboot" RPM, and the hand editing of xinetd config files for tftpd ignores the availability of "chkconfig" and "service" to manage that service. For more sophisticated users, it doesn't mention "never, never, never set your default menu to install an OS by default, because you *will* accidentally wipe servers that select PXE boot first before local disk as their boot media". Nor does it mention the difficulties with PXE and NAT based virtual host, nor how to verify the TFTP service's basic operation, nor the difficulty of maintaining multiple PXE configs when the main rsync mirrors only publish the most recent CentOS. I'm happy to add that sort of thing to the wiki, but I'm finding the "Set up an account" page confusing. Is "FirstnameLastname" supposed to be your mandated login name?

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qemu-kvm-ev-2.3.0-31.el7_2.21.1 available for testing on x86_64, ppc64le and aarch64
by Sandro Bonazzola 19 Aug '16

19 Aug '16

qemu-kvm-ev-2.3.0-31.el7_2.21.1 has been tagged for testing for CentOS Virt SIG and is already in testing repositories. It's now available for x86_64, ppc64le and aarch64. Please help testing and providing feedback, thanks. We plan to move to stable repo around Wednesday next week. ChangeLog since previous release: * Fri Aug 19 2016 Sandro Bonazzola <sbonazzo(a)redhat.com> - ev-2.3.0-31.el7_2.21 - Removing RH branding from package name * Tue Aug 02 2016 Miroslav Rezanina <mrezanin(a)redhat.com> - rhev-2.3.0-31.el7_2.21 - kvm-block-iscsi-avoid-potential-overflow-of-acb-task-cdb.patch [bz#1358997] - Resolves: bz#1358997 (CVE-2016-5126 qemu-kvm-rhev: Qemu: block: iscsi: buffer overflow in iscsi_aio_ioctl [rhel-7.2.z]) * Wed Jul 27 2016 Miroslav Rezanina <mrezanin(a)redhat.com> - rhev-2.3.0-31.el7_2.20 - kvm-virtio-error-out-if-guest-exceeds-virtqueue-size.patch [bz#1359731] - Resolves: bz#1359731 (EMBARGOED CVE-2016-5403 qemu-kvm-rhev: Qemu: virtio: unbounded memory allocation on host via guest leading to DoS [rhel-7.2.z]) * Wed Jul 20 2016 Miroslav Rezanina <mrezanin(a)redhat.com> - rhev-2.3.0-31.el7_2.19 - kvm-qemu-sockets-use-qapi_free_SocketAddress-in-cleanup.patch [bz#1354090] - kvm-tap-use-an-exit-notifier-to-call-down_script.patch [bz#1354090] - kvm-slirp-use-exit-notifier-for-slirp_smb_cleanup.patch [bz#1354090] - kvm-net-do-not-use-atexit-for-cleanup.patch [bz#1354090] - Resolves: bz#1354090 (Boot guest with vhostuser server mode, QEMU prompt 'Segmentation fault' after executing '(qemu)system_powerdown') * Fri Jul 08 2016 Miroslav Rezanina <mrezanin(a)redhat.com> - rhev-2.3.0-31.el7_2.18 - kvm-vhost-user-disable-chardev-handlers-on-close.patch [bz#1351892] - kvm-char-clean-up-remaining-chardevs-when-leaving.patch [bz#1351892] - kvm-sockets-add-helpers-for-creating-SocketAddress-from-.patch [bz#1351892] - kvm-socket-unlink-unix-socket-on-remove.patch [bz#1351892] - kvm-char-do-not-use-atexit-cleanup-handler.patch [bz#1351892] - Resolves: bz#1351892 (vhost-user: A socket file is not deleted after VM's port is detached.) * Tue Jun 28 2016 Miroslav Rezanina <mrezanin(a)redhat.com> - rhev-2.3.0-31.el7_2.17 - kvm-vhost-user-set-link-down-when-the-char-device-is-clo.patch [bz#1348593] - kvm-vhost-user-fix-use-after-free.patch [bz#1348593] - kvm-vhost-user-test-fix-up-rhel6-build.patch [bz#1348593] - kvm-vhost-user-test-fix-migration-overlap-test.patch [bz#1348593] - kvm-vhost-user-test-fix-chardriver-race.patch [bz#1348593] - kvm-vhost-user-test-use-unix-port-for-migration.patch [bz#1348593] - kvm-vhost-user-test-fix-crash-with-glib-2.36.patch [bz#1348593] - kvm-vhost-user-test-use-correct-ROM-to-speed-up-and-avoi.patch [bz#1348593] - kvm-tests-append-i386-tests.patch [bz#1348593] - kvm-vhost-user-add-ability-to-know-vhost-user-backend-di.patch [bz#1348593] - kvm-qemu-char-add-qemu_chr_disconnect-to-close-a-fd-acce.patch [bz#1348593] - kvm-vhost-user-disconnect-on-start-failure.patch [bz#1348593] - kvm-vhost-net-do-not-crash-if-backend-is-not-present.patch [bz#1348593] - kvm-vhost-net-save-restore-vhost-user-acked-features.patch [bz#1348593] - kvm-vhost-net-save-restore-vring-enable-state.patch [bz#1348593] - kvm-test-start-vhost-user-reconnect-test.patch [bz#1348593] - Resolves: bz#1348593 (No recovery after vhost-user process restart) -- Sandro Bonazzola Better technology. Faster innovation. Powered by community collaboration. See how it works at redhat.com

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how to enable auto-start on newer versions of Xen ?
by Craig Thompson 16 Aug '16

16 Aug '16

Hello, In days past, all I had to do was create /etc/xen/auto and put a symlink in there to the config file for each VM I wanted to have started automatically. Since updating to 4.6, this doesn't work. Period. I'm having a hard time finding what needs to change in order to get VMs to auto start on reboot of a server. Can someone please point me to documentation that I have missed or share the gold nugget? -- Craig Thompson, President Caldwell Global Communications, Inc.

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