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[libvirt-users] Possible to resize a Windows guest's disk while online?
by Andre Goree 21 Apr '18

21 Apr '18

I'm looking for a way to online resize a Windows disk -- i.e., be able to resize the disk without shutting down, rebooting, or detaching the disk. Is this at all possible? Or am I just barking up the wrong tree? I'm not finding a way to do this and even Amazon has a weird workaround, in which the user must write data to the newly resized-drive in order to recognize the new size without taking the disk or the VM offline. [Obligatory] YAY Microsoft. -- Andre Goree -=-=-=-=-=- Email - andre at drenet.net Website - http://blog.drenet.net PGP key - http://www.drenet.net/pubkey.html -=-=-=-=-=-

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[libvirt-users] Share ZFS zpool between host and VM's
by Steffen Sledz 19 Apr '18

19 Apr '18

Is it possible to share a ZFS zpool between the host and one or more QEMU/KVM clients?

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[libvirt-users] qemu: qemu_thread_create: Resource temporarily unavailable
by llilulu 18 Apr '18

18 Apr '18

Hi: My libvirt is 3.4.0 and qemu is 2.9.0, My host has a big memory(128G), I run many guest on my host(80 guests), when I batch stop and start guests, some guest will crash, the qemu log is "qemu: qemu_thread_create: Resource temporarily unavailable". I search qemu code, I find qemu_thread_create just like pthread_create function. I search on internet, someone say that is a bug of qemu.Because my host run many guest ,so I cann't ensure whether qemu bug or my host load heavy cause my guest crash. Can someone tell me what reason cause the promble? and what can I do avoid the promble? Thanks

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[libvirt-users] can't find how to solve "QEMU guest agent is not connected"
by Matt 18 Apr '18

18 Apr '18

I am trying to make Qemu agent work with libvirt thanks to https://github.com/NixOS/nixops/pull/922 with libvirt 4.1.0. I've been trying to make it work for quite some time but I still haven't the slightest idea of what is wrong, I keep seeing "Guest agent is not responding: QEMU guest agent is not connected" as the program I use (nixops) calls the libvirt python API. I apologize in advance for dropping so many details but in case someone is interested in answering this post, I thought I would provide details upfront. The failure surprises me as typically a socket is created when I start the VM with a priori the correct rights myuser:libvirtd (libvirtd is the default libvirt group on nixos, different from upstream IIRC): /var/lib/libvirt/qemu/channel/target/domain-10-nixops-3cb2c9c2-41ea/org.qemu.guest_agent.0 My domain contains ``` <channel type='unix'> <target type='virtio' name='org.qemu.guest_agent.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> ``` as requested per the doc (I tried with source=bind to no avail, btw the doc for `source` is not that great) my libvirtd.conf has the following setting ``` log_level = 1 # no filter for now log_filters="1:qemu.qemu_agent 1:qemu.qemu_monitor" # log_filters="3:remote 4:event 3:json 3:rpc" log_outputs="1:file:/var/log/libvirt/libvirtd.log" ``` `journalctl -b -u libvirtd.service` returns ``` avril 17 12:31:05 jedha libvirtd[22804]: 2018-04-17 03:31:05.482+0000: 22806: error : qemuDomainAgentAvailable:7755 : Guest agent is not responding: QEMU guest agent is not connected avril 17 12:31:06 jedha libvirtd[22804]: 2018-04-17 03:31:06.487+0000: 22807: error : qemuDomainAgentAvailable:7755 : Guest agent is not responding: QEMU guest agent is not connected avril 17 12:31:07 jedha libvirtd[22804]: 2018-04-17 03:31:07.493+0000: 22805: error : qemuDomainAgentAvailable:7755 : Guest agent is not responding: QEMU guest agent is not connected avril 17 12:31:08 jedha libvirtd[22804]: 2018-04-17 03:31:08.499+0000: 22809: error : qemuDomainAgentAvailable:7755 : Guest agent is not responding: QEMU guest agent is not connected avril 17 12:31:09 jedha libvirtd[22804]: 2018-04-17 03:31:09.506+0000: 22808: error : qemuDomainAgentAvailable:7755 : Guest agent is not responding: QEMU guest agent is not connected avril 17 12:31:10 jedha libvirtd[22804]: 2018-04-17 03:31:10.513+0000: 22806: error : qemuDomainAgentAvailable:7755 : Guest agent is not responding: QEMU guest agent is not connected avril 17 12:31:11 jedha libvirtd[22804]: 2018-04-17 03:31:11.512+0000: 22804: error : virNetSocketReadWire:1809 : End of file while reading data: Input/output error ``` Here is an excerpt just before the error "GUest agent is not connected" (full log of 82MB available at https://drive.google.com/file/d/1sYpyJ2WQMlyFqNKkPkvSAJ13Tm2JjpVk/view?usp=…) ``` 2018-04-17 03:56:41.982+0000: 806: debug : virEventPollMakePollFDs:401 : Prepare n=5 w=6, f=12 e=1 d=0 2018-04-17 03:56:41.983+0000: 806: debug : virEventPollMakePollFDs:401 : Prepare n=6 w=7, f=13 e=1 d=0 2018-04-17 03:56:41.983+0000: 806: debug : virEventPollMakePollFDs:401 : Prepare n=7 w=8, f=15 e=1 d=0 2018-04-17 03:56:41.983+0000: 807: debug : virAccessManagerCheckDomain:234 : manager=0x55fa67d0d450(name=stack) driver=QEMU domain=0x7f2c5800c040 perm=1 2018-04-17 03:56:41.983+0000: 806: debug : virEventPollMakePollFDs:401 : Prepare n=8 w=9, f=17 e=25 d=0 2018-04-17 03:56:41.983+0000: 807: debug : virAccessManagerCheckDomain:234 : manager=0x55fa67d0d6f0(name=none) driver=QEMU domain=0x7f2c5800c040 perm=1 2018-04-17 03:56:41.983+0000: 806: debug : virEventPollMakePollFDs:401 : Prepare n=9 w=10, f=18 e=1 d=0 2018-04-17 03:56:41.983+0000: 807: info : virObjectUnref:350 : OBJECT_UNREF: obj=0x55fa67d0d450 2018-04-17 03:56:41.983+0000: 806: debug : virEventPollMakePollFDs:401 : Prepare n=10 w=11, f=19 e=1 d=0 2018-04-17 03:56:41.983+0000: 807: info : virObjectRef:388 : OBJECT_REF: obj=0x7f2c14026460 2018-04-17 03:56:41.983+0000: 806: debug : virEventPollMakePollFDs:401 : Prepare n=11 w=13, f=23 e=25 d=0 2018-04-17 03:56:41.983+0000: 807: debug : qemuDomainObjBeginJobInternal:5393 : Starting job: query (vm=0x7f2c58004770 name=nixops-4f58a5c0-41f3-11e8-9858-309c233b770e-server, current job=none async=none) 2018-04-17 03:56:41.983+0000: 806: debug : virEventPollCalculateTimeout:338 : Calculate expiry of 1 timers 2018-04-17 03:56:41.983+0000: 807: debug : qemuDomainObjBeginJobInternal:5434 : Started job: query (async=none vm=0x7f2c58004770 name=nixops-4f58a5c0-41f3-11e8-9858-309c233b770e-server) 2018-04-17 03:56:41.983+0000: 806: debug : virEventPollCalculateTimeout:371 : No timeout is pending 2018-04-17 03:56:41.983+0000: 807: info : virObjectUnref:350 : OBJECT_UNREF: obj=0x7f2c14026460 2018-04-17 03:56:41.983+0000: 806: info : virEventPollRunOnce:640 : EVENT_POLL_RUN: nhandles=12 timeout=-1 2018-04-17 03:56:41.983+0000: 807: error : qemuDomainAgentAvailable:7755 : Guest agent is not responding: QEMU guest agent is not connected ``` This is the VM log from a machine similar to the one in the previous messages (same config) ``` 2018-04-16 08:28:47.875+0000: starting up libvirt version: 4.1.0, qemu version: 2.11.1, hostname: jedha LC_ALL=C PATH=/run/libvirt/nix-emulators:/nix/store/f8hxcp939qwpiwzm6999gljdkd2kzg6v-iptables-1.6.2/bin:/nix/store/fs4p0aw14snppfcjrzmiic52sjc3z627-iproute2-4.15.0/bin:/nix/store/bbrlfy430b48fywf7rgk4x1qxrpm695j-pm-utils-1.4.1/bin:/nix/store/waj4yidjf59mknpkcd99pdp0wf1x5gs7-numad-0.5/bin:/nix/store/hz5x8d3nlqvkv63mkxajblp9pkawlwvq-numactl-2.0.11/bin:/nix/store/pj5iq5sdhc3f8v6ysyxssm039jrkxmcl-bridge-utils-1.5/bin:/nix/store/bkrl7mxmzn0whm1n29dhyhdhlgkv0m8c-dmidecode-3.1/bin:/nix/store/h6x6i584ihp1qvk19vvyk5gqjznxk6bp-dnsmasq-2.78/bin:/nix/store/xvnsxcsq2ca3cs7z4952jdjid48ql32c-ebtables-2.0.10-4/bin:/nix/store/j7x4cjlfrdhagmciqk5zc58g1icg91rb-qemu-2.11.1/bin:/nix/store/qrxs7sabhqcr3j9ai0j0cp58zfnny0jz-coreutils-8.29/bin:/nix/store/3ixa5cn578zz4pr81a0rdkbi4dal748a-findutils-4.6.0/bin:/nix/store/xd4m1v7q7kn902p8hvnfn79c2wjijlif-gnugrep-3.1/bin:/nix/store/r0wkp0vkw6wjfl0skmdpykabgj1bkyn2-gnused-4.4/bin:/nix/store/aw6jabbci1k81j6hvyskkhb3va45wws2-systemd-237/bin:/nix/store/j7x4cjlfrdhagmciqk5zc58g1icg91rb-qemu-2.11.1/sbin:/nix/store/qrxs7sabhqcr3j9ai0j0cp58zfnny0jz-coreutils-8.29/sbin:/nix/store/3ixa5cn578zz4pr81a0rdkbi4dal748a-findutils-4.6.0/sbin:/nix/store/xd4m1v7q7kn902p8hvnfn79c2wjijlif-gnugrep-3.1/sbin:/nix/store/r0wkp0vkw6wjfl0skmdpykabgj1bkyn2-gnused-4.4/sbin:/nix/store/aw6jabbci1k81j6hvyskkhb3va45wws2-systemd-237/sbin QEMU_AUDIO_DRV=none /run/libvirt/nix-emulators/qemu-kvm -name guest=nixops-0084610a-4150-11e8-aef5-309c233b770e-server,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-7-nixops-0084610a-4150/master-key.aes -machine pc-i440fx-2.11,accel=kvm,usb=off,dump-guest-core=off -m 512 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid ad67fc0b-d93d-455d-a6e6-5549451e08ac -display none -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-7-nixops-0084610a-4150/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -no-acpi -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x3 -drive file=/var/lib/libvirt/images/nixops-0084610a-4150-11e8-aef5-309c233b770e-server.qcow2,format=qcow2,if=none,id=drive-ide0-0-0 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -netdev tap,fd=21,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:84:7f:ee,bus=pci.0,addr=0x2 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain-7-nixops-0084610a-4150/org.qemu.guest_agent.0,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 -device usb-kbd,id=input0,bus=usb.0,port=1 -device usb-mouse,id=input1,bus=usb.0,port=2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 -msg timestamp=on 2018-04-16T08:28:47.931670Z qemu-system-x86_64: -chardev pty,id=charserial0: char device redirected to /dev/pts/4 (label charserial0) 2018-04-16T08:32:04.730417Z qemu-system-x86_64: terminating on signal 15 from pid 1211 (/nix/store/ggqq9v3h5w66gnzbg3wg74s0ad7m0rjk-libvirt-4.1.0/sbin/libvirtd) 2018-04-16 08:32:04.931+0000: shutting down, reason=destroyed ``` Let me know what I can do to diagnose the error, or if any additionnal details would help. I will happily provide them. Best regards Matt

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[libvirt-users] How allocate ip for guest in xml file
by llilulu 17 Apr '18

17 Apr '18

Hi: I encounter a promble when I use libvirt manager my virtual machine. I use dhcp allocate IP for my guest, but use dhcp manager IP source, I will ensure guest run NetworkManager auto start NIC in dhcp type get IP. But some release system no install NetworkManager, or some installed system no install NetworkManager, so when I manager those guest, I cann't allocate IP for guest via dhcp server. I want know has other way allocate ip for guest in guest xml file when create the guest, I search "libvirt domain xml format", I find use blow xml configuration in <interface/> <ip address='192.168.122.5' prefix='24'/> But I add this in my guest xml file, virsh create guest will report an error: "error: unsupported configuration: Invalid attempt to set network interface guest-side IP route and/or address info, not supported by QEMU" I want to know if I use dhcp allocate IP for guest, has some way auto start guest dhclinet when guest start(because NIC can hotplug, I cann't write NIC configure file for it). or I want configure IP for guest in guest xml file,How cant I do? my libvirt version is 3.4.0, qemu is 2.9.0. I compile libvirt and qemu myself, when compile its run ./configure script without specific args. If I want qemu or libvirt support configure IP in guest xml file, how I compile libvirt and qemu? Thanks.

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[libvirt-users] Online Disk Resize with Windows Server 2016
by Andre Goree 13 Apr '18

13 Apr '18

I'm having an issue when resizing a disk (a Ceph RBD disk, though the type of disk shouldn't matter, I'd think) attached to a Windows Server 2016 guest. After I resize the disk, the newly-created disk space is _not_ recognized by the server. Even after running Action > Rescan from the Disk Management app, the new disk space does not show. However, when I perform the same resize on a Windows Server 2012 or even a Sever 2008 system, the Action > Rescan works fine and the newly-created disk space is recognized without needed to detach the drive or reboot the VM. Does anyone have an idea of what may have changed in Windows 2k16 that might be causing this? Possibly some undocumented registry change or something? -- Andre Goree -=-=-=-=-=- Email - andre at drenet.net Website - http://blog.drenet.net PGP key - http://www.drenet.net/pubkey.html -=-=-=-=-=-

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[libvirt-users] kvm-vnc question
by 李卓瑶 13 Apr '18

13 Apr '18

hi: very glad writing to you,even though i don't confirm can hear from you. And my english is poor ,so.. I'm a developer on kvm from china, and i meet a question that "virsh define geneic.xml" in arm platform failded with unsupported configuration: PCI controller at index 1(0x01) has bus='0x01',but index must be larger than bus Because i add the vnc info in generic.xml. If i delete it ,virsh define would be ok. The issue only happened in arm platform. And nothing error in x86 platform. I think may be something error happened in pci.Right? I have tryed much ,but work out nothing.Could you give me a head! ----------------------- Have a good day

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Re: [libvirt-users] Fail to compile libvirt with address sanitizer by clang-7
by Michal Privoznik 12 Apr '18

12 Apr '18

On 04/10/2018 05:22 AM, Han Han wrote: > Hi, > I tried to compile libvirt with address sanitizer( > https://github.com/google/sanitizers/wiki/AddressSanitizer) to discover > memory errors. But fails when make. > Code version: > $ git describe > v4.2.0-92-g3f204e4de > > Compile tools: > automake 1:1.15.1-3 all [installed] > clang-7 1:7~svn323616-1 amd64 [installed,automatic] > make 4.2.1-1 amd64 [installed,automatic] > > Compile steps: > $ ./bootstrap > $ CC=clang-7 CFLAGS="-g -O1 -fsanitize=address -fno-omit-frame-pointer > -Wno-error" LDFLAGS="-fsanitize=address" ./configure > > Configure succed. > $ make > But error appeared: > make all-am > make[3]: Entering directory '/home/hhan/Software/libvirt/src' > CCLD libvirt.la > ./.libs/libvirt_util.a(libvirt_util_la-viralloc.o): In function `virAlloc': > /home/hhan/Software/libvirt/src/util/viralloc.c:144: undefined reference to > `__asan_report_store8' Huh, I remember seeing different error when trying this (although I'm using gcc). However, I suspect '-Wl,-z -Wl,defs' arguments are problem. We add them onto linker cmd line. You can try applying this patch and see if it helps: diff --git i/configure.ac w/configure.ac index 18587270e6..e23c0e4c22 100644 --- i/configure.ac +++ w/configure.ac @@ -237,7 +237,6 @@ LIBVIRT_COMPILE_WARNINGS LIBVIRT_COMPILE_PIE LIBVIRT_LINKER_RELRO LIBVIRT_LINKER_NO_INDIRECT -LIBVIRT_LINKER_NO_UNDEFINED LIBVIRT_ARG_APPARMOR LIBVIRT_ARG_ATTR Michal

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[libvirt-users] Disable guest discovery in virt-manager
by Gionatan Danti 12 Apr '18

12 Apr '18

Hi all, on CentOS7 / RHEL7 launching virt-manager causes a "discovery process" of the various configured VMs. This discovery is executed by inspection and overlayed disk files and it create a very short lived guest-xxxzzzyyy virtual machine. The end result is a pretty icon to the left of the virtual machine entry (ie: CentOS icon for a CentOS VM) and the list of installad packages inside the virtual disk. That said, I would like to disable such behavior. How can I do that? Thanks. -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: g.danti(a)assyoma.it - info(a)assyoma.it GPG public key ID: FF5F32A8

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[libvirt-users] start a domain, minimal memory request.
by llilulu 11 Apr '18

11 Apr '18

Hi: I use libvirt manage virtual guest, When I start many virtual domain(my host 128G physical memory）, example, I start 100 guest, 1G per guest。sometime I will encounter "cannot allocate memory", "cannot set up guest memory \'pc.ram\'： cannot allocate memory". sometime encounter qemu process killed by system(oom), I want to know what minimal memory need when start a domain ? and how many host free memory reserve can ensure vm running steady. Thanks

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