June 2018 - Users - libvirt List Archives

[libvirt-users] Network problem when rebooting Fedora qemu/kvm guest on Gentoo host
by Dan Johansson 17 Jun '18

17 Jun '18

Hello, I have some problem with some of my qemu/kvm guests running Fedora on a Gentoo host where my Gentoo guests works without problem. The problem that I have is that when I reboot (shutdown -r now) the Fedora guest "loses" (ifconfig does not show a IP-address) their network connections. The Gentoo guests reboots without problem. All the guests have same HW-configuration, only Name/DiskImage/MAC- addresses differ. Here some technical details: Host: Distribution Gentoo Kernel 4.9.95-gentoo Qemu app-emulation/qemu-2.11.1-r2 USE="aio bzip2 caps curl fdt filecaps gnutls jpeg lzo ncurses nls pin-upstream-blobs png sdl seccomp vhost-net vnc xattr" QEMU_SOFTMMU_TARGETS="x86_64" QEMU_USER_TARGETS="x86_64" libvirt app-emulation/libvirt-4.3.0 USE="caps dbus libvirtd nls qemu udev" Guest Distribution Fedora 28 Kernel 4.16.15-300.fc28.x86_64 Networkmanager NetworkManager.x86_64 1:1.10.8-1.fc28 Any suggestions? -- Dan Johansson *************************************************** This message is printed on 100% recycled electrons! ***************************************************

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[libvirt-users] Feedback for a new application NIMO using the libvirt API
by Jay Mehta 13 Jun '18

13 Jun '18

Hello folks, A while back I developed VM instance monitoring tool "NIMO", Nova (Openstack's project Nova) Instance Monitor. The need to develop Nimo arise with requirement to monitor VM's boot stages. A VM boot undergoes multiple stages, like creating block device, mounting root filesystem, mounting local filesystem, DHCP lease acquiring, post-install activities, etc., and it could fail or stuck at any of these stages. It would be good to have a monitor in place to identify which stage a VM is in while booting and how much time it takes at each stage. A special need for such tool arise on the cloud space, where end-user do not have access to log on to the hypervisor. It also helps to people who build custom VM images and add a lot of tasks in post install script and would like to know performance of each step. The below is the github link and it has an architecture diagram. https://github.com/jay-g-mehta/nimo I would love to hear all of your response and feel free to use it, extend it. Thanks, Jay

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[libvirt-users] "virsh" list
by Bo YU 13 Jun '18

13 Jun '18

Hello, I installed libvirt from package manager(debian apt) and want to modify feture in it, so i git clone from https://libvirt.org/git/?p=libvirt.git;a=summary But now i have trouble to start virsh. I have traced the email: https://www.redhat.com/archives/libvirt-users/2017-February/msg00074.html Here is output of command below: strace -o libvirt.log -f -s 1000 /usr/sbin/libvirtd https://github.com/yuzibo/linux-programming/blob/master/tmp/libvirt.log Here: sudo gdb -p $(pgrep libvirtd) (gdb) t a a bt [New LWP 14781] [New LWP 14782] [New LWP 14783] [New LWP 14784] [New LWP 14785] [New LWP 14786] [New LWP 14787] [New LWP 14788] [New LWP 14789] [New LWP 14790] [New LWP 14791] [New LWP 14792] [New LWP 14793] [New LWP 14794] [New LWP 14795] [New LWP 14796] [New LWP 14799] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". 0x00007fcf4c75f67d in poll () at ../sysdeps/unix/syscall-template.S:84 84../sysdeps/unix/syscall-template.S: (no such file or directory)没有那个文件或目录. "" Thread 18 (Thread 0x7fcf3a4e8700 (LWP 14799)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x7fcf3400cc90, m=m@entry=0x7fcf3400cc50) at util/virthread.c:154 #2 0x00007fcf405498a0 in udevEventHandleThread (opaque=<optimized out>) at node_device/node_device_udev.c:1606 #3 0x00007fcf4e17ec02 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf3a4e8700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 17 (Thread 0x7fcf3b315700 (LWP 14796)): #0 0x00007fcf4c75f67d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007fcf4c77917e in __poll_chk (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>, fdslen=<optimized out>) at poll_chk.c:27 #2 0x00007fcf4e10f281 in poll (__timeout=-1, __nfds=<optimized out>, __fds=0x7fcf3b3143b0) at /usr/include/x86_64-linux-gnu/bits/poll2.h:41 #3 virCommandProcessIO (cmd=cmd@entry=0x7fcf34015d30) --Type <return> to continue, or q <return> to quit--- at util/vircommand.c:2085 #4 0x00007fcf4e1134ea in virCommandRun (cmd=0x7fcf34015d30, exitstatus=exitstatus@entry=0x7fcf3b314924) at util/vircommand.c:2316 #5 0x00007fcf3e239fca in virQEMUCapsInitQMPCommandRun ( cmd=cmd@entry=0x7fcf34015b10, forceTCG=forceTCG@entry=false) at qemu/qemu_capabilities.c:4262 #6 0x00007fcf3e23f4b9 in virQEMUCapsInitQMP (qmperr=0x7fcf3b314970, runGid=<optimized out>, runUid=<optimized out>, libDir=<optimized out>, qemuCaps=0x7fcf340159d0) at qemu/qemu_capabilities.c:4318 #7 virQEMUCapsNewForBinaryInternal (hostArch=VIR_ARCH_X86_64, binary=0x7fcf3403e160 "/usr/local/bin/qemu-system-x86_64", libDir=<optimized out>, runUid=<optimized out>, runGid=<optimized out>, microcodeVersion=166, kernelVersion=0x7fcf3404e120 "4.14.0+ #1 SMP Sun Nov 26 15:17:48 HKT 2017") at qemu/qemu_capabilities.c:4405 #8 0x00007fcf3e23f793 in virQEMUCapsNewData (binary=<optimized out>, privData=<optimized out>) at qemu/qemu_capabilities.c:4447 #9 0x00007fcf4e18ca1e in virFileCacheNewData ( name=0x7fcf3403e160 "/usr/local/bin/qemu-system-x86_64", cache=0x7fcf3404ddf0) at util/virfilecache.c:219 #10 virFileCacheValidate (cache=cache@entry=0x7fcf3404ddf0, name=name@entry=0x7fcf3403e160 "/usr/local/bin/qemu-system-x86_64", data=data@entry=0x7fcf3b314ae0) at util/virfilecache.c:290 ---Type <return> to continue, or q <return> to quit--- #11 0x00007fcf4e18cd77 in virFileCacheLookup ( cache=cache@entry=0x7fcf3404ddf0, name=name@entry=0x7fcf3403e160 "/usr/local/bin/qemu-system-x86_64") at util/virfilecache.c:323 #12 0x00007fcf3e23f9ee in virQEMUCapsCacheLookup ( cache=cache@entry=0x7fcf3404ddf0, binary=0x7fcf3403e160 "/usr/local/bin/qemu-system-x86_64") at qemu/qemu_capabilities.c:4583 #13 0x00007fcf3e23fc94 in virQEMUCapsInitGuest (guestarch=VIR_ARCH_X86_64, hostarch=VIR_ARCH_X86_64, cache=0x7fcf3404ddf0, caps=0x7fcf3404ded0) at qemu/qemu_capabilities.c:736 #14 virQEMUCapsInit (cache=0x7fcf3404ddf0) at qemu/qemu_capabilities.c:971 #15 0x00007fcf3e28d3a0 in virQEMUDriverCreateCapabilities ( driver=driver@entry=0x7fcf3401cbd0) at qemu/qemu_conf.c:1101 #16 0x00007fcf3e2d0be2 in qemuStateInitialize (privileged=true, callback=<optimized out>, opaque=<optimized out>) at qemu/qemu_driver.c:851 #17 0x00007fcf4e2b0bff in virStateInitialize (privileged=<optimized out>, callback=0x564b91ad18a0 <daemonInhibitCallback>, opaque=0x564b933e4540) at libvirt.c:662 #18 0x0000564b91ad18fb in daemonRunStateInit (opaque=0x564b933e4540) at remote/remote_daemon.c:802 #19 0x00007fcf4e17ec02 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 ---Type <return> to continue, or q <return> to quit--- #20 0x00007fcf4ca26494 in start_thread (arg=0x7fcf3b315700) at pthread_create.c:333 #21 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 16 (Thread 0x7fcf3bb16700 (LWP 14795)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933f1bc8, m=m@entry=0x564b933f1ba0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d6d80) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf3bb16700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 15 (Thread 0x7fcf3c317700 (LWP 14794)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933f1bc8, ---Type <return> to continue, or q <return> to quit--- m=m@entry=0x564b933f1ba0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d6cc0) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf3c317700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 14 (Thread 0x7fcf3cb18700 (LWP 14793)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933f1bc8, m=m@entry=0x564b933f1ba0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d6c00) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf3cb18700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 ---Type <return> to continue, or q <return> to quit--- Thread 13 (Thread 0x7fcf3d319700 (LWP 14792)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933f1bc8, m=m@entry=0x564b933f1ba0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d6b20) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf3d319700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 12 (Thread 0x7fcf3db1a700 (LWP 14791)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933f1bc8, m=m@entry=0x564b933f1ba0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d6a60) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) ---Type <return> to continue, or q <return> to quit--- at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf3db1a700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 11 (Thread 0x7fcf41df5700 (LWP 14790)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e49b8, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f944 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d5ca0) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf41df5700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 10 (Thread 0x7fcf425f6700 (LWP 14789)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 ---Type <return> to continue, or q <return> to quit--- #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e49b8, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f944 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d5b00) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf425f6700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 9 (Thread 0x7fcf42df7700 (LWP 14788)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e49b8, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f944 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d5bc0) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf42df7700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () ---Type <return> to continue, or q <return> to quit--- at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 8 (Thread 0x7fcf435f8700 (LWP 14787)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e49b8, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f944 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d5b00) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf435f8700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 7 (Thread 0x7fcf43df9700 (LWP 14786)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e49b8, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f944 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d5d60) at util/virthreadpool.c:124 ---Type <return> to continue, or q <return> to quit--- #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf43df9700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 6 (Thread 0x7fcf445fa700 (LWP 14785)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e4918, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d5b00) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf445fa700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 5 (Thread 0x7fcf44dfb700 (LWP 14784)): #0 pthread_cond_wait@@GLIBC_2.3.2 () ---Type <return> to continue, or q <return> to quit--- at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e4918, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d5bc0) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf44dfb700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 4 (Thread 0x7fcf455fc700 (LWP 14783)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e4918, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d5ca0) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf455fc700) at pthread_create.c:333 ---Type <return> to continue, or q <return> to quit--- #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 3 (Thread 0x7fcf45dfd700 (LWP 14782)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e4918, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( opaque=opaque@entry=0x564b933d5d60) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf45dfd700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 2 (Thread 0x7fcf465fe700 (LWP 14781)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fcf4e17ee36 in virCondWait (c=c@entry=0x564b933e4918, m=m@entry=0x564b933e48f0) at util/virthread.c:154 #2 0x00007fcf4e17f983 in virThreadPoolWorker ( ---Type <return> to continue, or q <return> to quit--- opaque=opaque@entry=0x564b933d5e20) at util/virthreadpool.c:124 #3 0x00007fcf4e17ebd8 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf465fe700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 1 (Thread 0x7fcf4eb4dd40 (LWP 14780)): #0 0x00007fcf4c75f67d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007fcf4e122684 in poll (__timeout=-1, __nfds=6, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46 #2 virEventPollRunOnce () at util/vireventpoll.c:641 #3 0x00007fcf4e121371 in virEventRunDefaultImpl () at util/virevent.c:327 #4 0x00007fcf4e243e4d in virNetDaemonRun (dmn=0x564b933e4540) at rpc/virnetdaemon.c:850 #5 0x0000564b91ad0d5e in main (argc=<optimized out>, argv=<optimized out>) at remote/remote_daemon.c:1460 Thank you in advance!

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[libvirt-users] Amazon s3 as libvirt storage pool
by Shashwat shagun 11 Jun '18

11 Jun '18

Namaste, i want to use Minio (open source amazon S3 compatible object storage) as libvirt storage pool. is such thing possible? i apologize if this is a stupid question. if not then can i write some driver for it? -- Regards, Shashwat Shagun

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[libvirt-users] Are more then one overlay possible without recieving a "Permission denied"?
by Xen Mann 07 Jun '18

07 Jun '18

I've created a backing chain like this. FirstFollr.ovl is an overlay to Base.img and so on. Base.img (ok - Win 10 Installation starting) FirstFloor.ovl (ok - Win 10 Installation starting) SecondFloor.ovl (permission denied -> Base.img) => assumed Bug Roof.ovl (permission denied -> Base.img) => assumed Bug Using virsh / virt-manager, I can only start Base and FirstFloor. Starting Second and Roof are failing. What's wrong? Details are described in: https://bugzilla.redhat.com/show_bug.cgi?id=1588373 System infos: Compiled against library: libvirt 4.0.0 Using library: libvirt 4.0.0 Using API: QEMU 4.0.0 Running hypervisor: QEMU 2.11.1 Ubuntu 18.04 LTS (Dell Precission Tower 3620)

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[libvirt-users] List-Archives ...
by thg 07 Jun '18

07 Jun '18

Hi everybody, actually I wanted to search the list archive, before asking, but unfortunately I don't "get" it: $ gunzip 2018-May.txt.gz gunzip: 2018-May.txt.gz: not in gzip format It seems, that in every archive-file there is always one message in plaintext and then a big binary block. Any hint? Thanks a lot, -- kind regards, thg

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[libvirt-users] Vlan on vhostuser interfaces
by Pradeep K.S 05 Jun '18

05 Jun '18

I am planning to configure vlan on vhostuser interfaces in the libvirt xml, it throws out error. Does this configuration is supported ? I can install higher version if required. *Error:* unsupported configuration: an interface of type 'vhostuser' is requesting a vlan tag, but that is not supported for this type of connection *Libvirt version:* [redhathost@qemu]# libvirtd --version libvirtd (libvirt) 3.2.0 *Qemu version:* QEMU emulator version 2.9.0(qemu-kvm-ev-2.9.0-16.el7_4.11.1) *Domain XML* <interface type='vhostuser'> <mac address='02:3a:c1:4b:a1:0a'/> <source type='unix' path='/tmp/vhost-test' mode='server'/> <vlan trunk='yes'> <tag id='3' nativeMode='tagged'/> <tag id='4'/> </vlan> <model type='virtio'/> <driver rx_queue_size='1024'> <host mrg_rxbuf='on'/> </driver> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> -- Thanks and Regards, Pradeep.K.S.

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[libvirt-users] Make discard='unmap' the default?
by Ian Pilcher 01 Jun '18

01 Jun '18

Is it possible to make discard='unmap' the default for virtio-scsi disks? (Related, is it possible to make virtio-scsi the default disk type, rather than virtio-blk?) Thanks! -- ======================================================================== Ian Pilcher arequipeno(a)gmail.com -------- "I grew up before Mark Zuckerberg invented friendship" -------- ========================================================================

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[libvirt-users] virRandomBits - not very random
by Brian Rak 01 Jun '18

01 Jun '18

I just ran into an issue where I had about 30 guests get duplicate mac addresses assigned. These were scattered across 30 different machines. Some debugging revealed that: 1) All the host machines were restarted within a couple seconds of each other 2) All the host machines had fairly similar libvirtd pids (within ~100 PIDs of each other) 3) Libvirt seeds the RNG using 'time(NULL) ^ getpid()' This perfectly explains why I saw so many duplicate mac addresses. Why is the RNG seed such a predictable value? Surely there has to be a better source of a random seed then the timestamp and the pid? The PID seems to me to be a very bad source of any randomness. I just ran a test across 60 of our hosts. 43 of them shared their PID with at least one other machine.

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[libvirt-users] Two Node Cluster
by Cobin Bluth 01 Jun '18

01 Jun '18

Hello Libvirt Users, I would like to setup a two node bare-metal cluster. I need to guidance on the network configuration. I have attached a small diagram, the same diagram can be seen here: https://i.imgur.com/SOk6a6G.png I would like to configure the following details: - Each node has a DHCP enabled guest network where VMs will run. (eg, *192.168.1.0/24 <http://192.168.1.0/24>* for Host1, and *192.168.2.0/24 <http://192.168.2.0/24>* for Host2) - Any guest in Host1 should be able to ping guests in Host2, and vice versa. - All guests have routes to reach the open internet (so that '*yum update*' will work "out-of-the-box") - Each node will be able to operate fully if the other physical node fails. (no central DHCP server, etc) - I would like to *add more physical nodes later* when I need the resources. This is what I have done so far: - Installed latest Ubuntu 18.04, with latest version of libvirt and supporting software from ubuntu's apt repo. - Each node can reach the other via its own eth0. - Each node has a working vxlan0, which can ping the other via its vxlan0, so it looks like the vxlan config is working. (I used *ip link add vxlan0 type vxlan...*) - Configured route on Host1 like so: *ip route add 192.168.2.0/24 <http://192.168.2.0/24> via 172.20.0.1* - Configured route on Host2 also: *ip route add 192.168.1.0/24 <http://192.168.1.0/24> via 172.20.0.2* - All guests on Host1 (and Host1) can ping eth0 and vxlan0 on Host2, and vice versa, yay. - Guests on Host1 *cannot* ping guests on Host2, I suspect because the the default NAT config of the libvirt network. So, at this point I started to search for tutorials or more information/documentation, but I am a little overwhelmed by the sheer amount of information, as well as a lot of "stale" information on blogs etc. I have learned that I can *virsh net-edit default*, and then change it to an "open" network:* <forward mode='open'/>* After doing this, the guests cannot reach outside their own network, nor reach the internet, so I assume that I would need to add some routes, or something else to get the network functioning like I want it. There is also *<forward mode="route"/>*, but I dont fully understand the scenarios where one would need an *open* or a *route* forward mode. I have also shied away from using openvswitch, and have opted for ifupdown2. (I have taken most of my inspiration from this blog post: https://joejulian.name/post/how-to-configure-linux-vxlans-with-multiple-uni… ) Some questions that I have for the mailing list, any help would be greatly appreciated: - Is my target configuration of a KVM cluster uncommon? Do you see drawbacks of this setup, or does it go against "typical convention"? - Would my scenario be better suited for an "*open*" network or a "*route*" network? - What would be the approach to complete this setup?

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