April 2018 - Users - libvirt List Archives

[libvirt-users] [virtual interface] detach interface during boot succeed with no changes
by Yalan Zhang 08 Sep '22

08 Sep '22

Hi guys, when I detach an interface from vm during boot (vm boot not finished), it always fail. I'm not sure if there is an existing bug. I have confirmed with someone that for disk, there is similar behavior, if this is also acceptable? # virsh destroy rhel7.2; virsh start rhel7.2 ;sleep 2; virsh detach-interface rhel7.2 network 52:54:00:98:c4:a0; sleep 2; virsh dumpxml rhel7.2 |grep /interface -B9 Domain rhel7.2 destroyed Domain rhel7.2 started Interface detached successfully <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </controller> <interface type='network'> <mac address='52:54:00:98:c4:a0'/> <source network='default' bridge='virbr0'/> <target dev='vnet0'/> <model type='rtl8139'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> When I detach after the vm boot, expand the sleep time to 10, it will succeed. # virsh destroy rhel7.2; virsh start rhel7.2 ;sleep 10; virsh detach-interface rhel7.2 network 52:54:00:98:c4:a0; sleep 2; virsh dumpxml rhel7.2 |grep /interface -B9 Domain rhel7.2 destroyed Domain rhel7.2 started Interface detached successfully ------- Best Regards, Yalan Zhang IRC: yalzhang Internal phone: 8389413

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[libvirt-users] Add Virtlyst to the list of libvirt users
by Daniel Nicoletti 23 Sep '20

23 Sep '20

Hi, I've just released v1.0.0 of Virtlyst[1] a web tool to manage VMs using Qt/C++/Cutelyst https://dantti.wordpress.com/2018/04/19/announcing-virtlyst-a-web-interface… Thanks. 1 - https://github.com/cutelyst/Virtlyst -- Daniel Nicoletti KDE Developer - http://dantti.wordpress.com

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[libvirt-users] Question about disabling UFO on guest
by Bao Nguyen 05 Aug '20

05 Aug '20

Hello everyone, I would like to ask a question regarding to disable UFO of virtio vNIC in my guest. I have read the document at https://libvirt.org/formatdomain.html *host* The csum, gso, tso4, tso6, ecn and ufo attributes with possible values on and off can be used to turn off host offloading options. By default, the supported offloads are enabled by QEMU. *Since 1.2.9 (QEMU only)* The mrg_rxbuf attribute can be used to control mergeable rx buffers on the host side. Possible values are on (default) and off. *Since 1.2.13 (QEMU only)* *guest* The csum, tso4, tso6, ecn and ufo attributes with possible values on and off can be used to turn off guest offloading options. By default, the supported offloads are enabl ed by QEMU. *Since 1.2.9 (QEMU only)* Then I disabled UFO on my vNIC on guest as the following configuration <devices> <interface type='network'> <source network='default'/> <target dev='vnet1'/> <model type='virtio'/> <driver name='vhost' txmode='iothread' ioeventfd='on' event_idx='off' queues='5' rx_queue_size='256' tx_queue_size='256'> *<host gso='off' ufo='off' />* *<guest ufo='off'/>* </driver> </interface> </devices> Then I reboot my node to get the change effect and it works. However, can I disable the UFO without touching the host OS? or it always has to disable on both host and guest like that? Thanks, Brs, Natsu

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[libvirt-users] ceph rbd pool and libvirt manageability (virt-install)
by Jelle de Jong 28 Aug '18

28 Aug '18

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello everybody, I created a rbd pool and activated it, but I can't seem to create volumes in it with virsh or virt-install? # virsh pool-dumpxml myrbdpool <pool type='rbd'> <name>myrbdpool</name> <uuid>2d786f7a-2df3-4d79-ae60-1535bcf1c6b5</uuid> <capacity unit='bytes'>6997998301184</capacity> <allocation unit='bytes'>10309227031</allocation> <available unit='bytes'>6977204658176</available> <source> <host name='ceph01.powercraft.nl' port='6789'/> <host name='ceph02.powercraft.nl' port='6789'/> <host name='ceph03.powercraft.nl' port='6789'/> <name>libvirt-pool</name> <auth type='ceph' username='libvirt'> <secret uuid='029a334e-ed57-4293-bb99-ffafa8867122'/> </auth> </source> </pool> # virt-install --version 1.0.1 # virsh --version 1.2.9 I ended using virsh edit ceph-test.powercraft.nl and making creating the disk manually. <disk type='network' device='disk'> <auth username='libvirt'> <secret type='ceph' uuid='029a334e-ed57-4293-bb99-ffafa8867122'/> </auth> <source protocol='rbd' name='libvirt-pool/kvm01-storage'> <host name='ceph01.powercraft.nl' port='6789'/> <host name='ceph02.powercraft.nl' port='6789'/> <host name='ceph03.powercraft.nl' port='6789'/> </source> <target dev='vdc' bus='virtio'/> </disk> I use virt-install a lot to define, import and undefine domains, how can I use virt-install to manage my rdb disks? Kind regards, Jelle de Jong -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iJwEAQECAAYFAlV1xlQACgkQ1WclBW9j5HkbPQP+PjNrzvlqysslOp2Yk7wH4Mxy 2sh2dn96G0KOAHEeEn3BN6IWlnD1TADZbHdpTtMwkdv48Xwn0sP1s+3QDM4pb3gP n+z+dVxS8FouDIy/eiso3IBCj3g4TWbEX8ZHqs3jKqe0lZgAXBzB9xYSUowcEBrZ ddkPbr8p8ozWyOG+9V8= =lkK7 -----END PGP SIGNATURE-----

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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] Create qcow2 v3 volumes via libvirt
by Gionatan Danti 24 May '18

24 May '18

Hi all, on a fully patched CentOS 7.4 x86-64, I see the following behavior: - when creating a new volumes using vol-create-as, the resulting file is a qcow2 version 2 (compat=0.10) file. Example: [root@gdanti-lenovo vmimages]# virsh vol-create-as default zzz.qcow2 8589934592 --format=qcow2 --backing-vol /mnt/vmimages/centos6.img Vol zzz.qcow2 created [root@gdanti-lenovo vmimages]# file zzz.qcow2 zzz.qcow2: QEMU QCOW Image (v2), has backing file (path /mnt/vmimages/centos6.img), 8589934592 bytes [root@gdanti-lenovo vmimages]# qemu-img info zzz.qcow2 image: zzz.qcow2 file format: qcow2 virtual size: 8.0G (8589934592 bytes) disk size: 196K cluster_size: 65536 backing file: /mnt/vmimages/centos6.img backing file format: raw Format specific information: compat: 0.10 refcount bits: 16 - when creating a snapshot, the resulting file is a qcow2 version 3 (comapt=1.1) file. Example: [root@gdanti-lenovo vmimages]# virsh snapshot-create-as centos6left --disk-only --no-metadata snap.qcow2 Domain snapshot snap.qcow2 created [root@gdanti-lenovo vmimages]# file centos6left.snap.qcow2 centos6left.snap.qcow2: QEMU QCOW Image (v3), has backing file (path /mnt/vmimages/centos6left.qcow2), 8589934592 bytes [root@gdanti-lenovo vmimages]# qemu-img info centos6left.snap.qcow2 image: centos6left.snap.qcow2 file format: qcow2 virtual size: 8.0G (8589934592 bytes) disk size: 196K cluster_size: 65536 backing file: /mnt/vmimages/centos6left.qcow2 backing file format: qcow2 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false From what I know, this is a deliberate decision: compat=1.1 requires relatively recent qemu version, and creating a new volume play on the "safe side" of compatibility. It is possible to create a new volume using qcow2 version 3 (compat=1.1) format *using libvirt/virsh* (I know I can do that via qemu-img)? Any drawback on using version 3 format? 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] Unable to detach disk using 'virsh detach-disk'
by Andre Goree 09 May '18

09 May '18

I'm unable to detach a disk from a Windows guest using the 'virsh detach-disk' command. Even though 'domblklist' shows the disk attached, and on the FIRST iteration, it says the command "completed successfully," 'domblklist will still show the disk attached and subsequent 'detach-disk' commands fail with 'no disk found whose source path or target is ${location}' ~ # virsh domblklist 31907-1063435 Target Source ------------------------------------------------ vda ${concatenated}/31907-1063435/2018-04-28-190529 vdb ${concatenated}/31907-67863/2018-03-21-033216.2018-04-28-190529 ~ # virsh detach-disk --domain 31907-1063435 /var/lib/libvirt/images/instances/31907-67863/2018-03-21-033216.2018-04-28-190529 --persistent error: No disk found whose source path or target is /var/lib/libvirt/images/instances/31907-67863/2018-03-21-033216.2018-04-28-190529 Any ideas as to why this happens? -- 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] User name / session idin logs
by Anastasiya Ruzhanskaya 07 May '18

07 May '18

Hello everyone, I have a question about logging. I need to find out whether it is possible to see user id/session id inside logs or somewhere else. It is not passed in structured across the network, so where should I look to find out, which user (which session) is currently performing the actions?

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[libvirt-users] connecting host and guest vm using a dummy nic
by daggs 03 May '18

03 May '18

Greetings all, I have a host machine that runs a router within a vm. I want to allow a connection between the host and the guest so the host can connect to the lan provided by the router vm. I've created a dummy interface with these commands: $ ip link add ens99-dummy type dummy $ ip link set ens99-dummy address 52:54:00:1f:d0:ff this resulted with this output: $ ifconfig ens99-dummy ens99-dummy Link encap:Ethernet HWaddr 52:54:00:1F:D0:FF inet6 addr: fe80::84b5:24ff:fe62:c16d/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:899 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:321727 (314.1 KiB) in my libvirt's xml file I have this entry: <interface type='direct'> <mac address='52:54:00:0c:cb:3e'/> <source dev='ens99-dummy' mode='private'/> <target dev='macvtap0'/> <model type='e1000'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x0'/> </interface> after the vm is up, I see the adapter in the vm and the host has one more entry: $ ifconfig macvtap0 macvtap0 Link encap:Ethernet HWaddr 52:54:00:0C:CB:3E inet6 addr: fe80::5054:ff:fe0c:cb3e/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:889 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 B) TX bytes:320523 (313.0 KiB) but when I try to request ip via dhcp from both macvtap0 and ens99-dummy I don't get any. any idea why?

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[libvirt-users] Server 2016 locked in paused state
by Paul O'Rorke 01 May '18

01 May '18

Hi all, I have a number of production Windows servers on KVM/DRBD and two of them are Server 2016. Both these guests have started exhibiting the same behaviour where they enter a paused state and will not resume. The behaviour is the same whether I use virsh or virt-manager. My only recourse is to force the guest off and start it again. This brings the host up temporarily where upon it pauses again. It could be minutes or hours but it always returns to being stuck in this paused state. I'm not seeing anything much in /var/log/kern.log or syslog - perhaps I'm missing the clue. Has anyone else seen this and or can you advise me where I should be looking to find the cause of this? Sincerely -- *Paul O'Rorke* *Tracker Software Products (Canada) Limited * www.tracker-software.com <http://www.tracker-software.com/> Tel: +1 (250) 324 1621 Fax: +1 (250) 324 1623 <http://www.tracker-software.com/> Support: http://www.tracker-software.com/support Download latest Releases http://www.tracker-software.com/downloads/

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[libvirt-users] LibVirt "make install" after successful compilation
by Azizul Hakim 30 Apr '18

30 Apr '18

I am having some issue with LibVirt installation from source code. I downloaded the latest code from git, was able to configure and compile it. But when I try to install it using *sudo make installi, *I get the following errors. Making install in po make[1]: Entering directory '~/libvirt/po' make[2]: Entering directory '~/libvirt/po' make[2]: Nothing to be done for 'install-exec-am'. make install-data-hook make[3]: Entering directory '~/libvirt/po' make[3]: *** No rule to make target 'af.gmo', needed by 'install-data-hook'. Stop. make[3]: Leaving directory '~/libvirt/po' Makefile:2027: recipe for target 'install-data-am' failed make[2]: *** [install-data-am] Error 2 make[2]: Leaving directory '~/libvirt/po' Makefile:1981: recipe for target 'install-am' failed make[1]: *** [install-am] Error 2 make[1]: Leaving directory '~/libvirt/po' Makefile:2105: recipe for target 'install-recursive' failed make: *** [install-recursive] Error 1 As I mentioned, there is no error during compiling the source code. It would be helpful if someone could point me in a direction so I can figure out the problem. Thanks Azizul Hakim

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[libvirt-users] [libvirt] ignore_value
by gaosheng cui 27 Apr '18

27 Apr '18

Hi,using ignore_value in libvirt source code to do function return value processing,but I can’t understand about it,can you give me some tips?thanks very much!

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[libvirt-users] qemu crash, qemu_thread_create: Resource temporarily unavailable
by llilulu 25 Apr '18

25 Apr '18

Hi My qemu is 2.9.0, libvirt is 3.4.0. I start many guest in short time(128G pyhsical memory ,1G per guest, 90 guest), and then run memtest on guest system.memtest just occupy guest memory，so when run memtest, host will allocate memory for guest. I run memtest on all my guest, and some guest will encounter crash. qemu log has qemu_thread_create: Resource temporarily unavailable record，I ask same question before, replier suggest I change qemu.conf max_process arg, but I cat /proc/$pid/limits, I find maxprocess limit is very big, I don't think is the args restrict. I think is when I run memtest on all guest, the host pressure very highly in short time, because when I run memtest on all guest, i encounter some other program core, I use gdb debug the core, I find is dump in allocate memory. so I want known qemu crash is that reason, and how host system acceptable pressure limit. when I encounter qemu crash, what can I do avoid the promble. Thanks

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[libvirt-users] Possible to resize a Windows guest's disk while online?
by Andre Goree 20 Apr '18

20 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 12 Apr '18

12 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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Re: [libvirt-users] Fail to compile libvirt with address sanitizer by clang-7
by Michal Privoznik 11 Apr '18

11 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 11 Apr '18

11 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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[libvirt-users] unprivileged container has wrong owners inside in /proc/ and /sys
by mxs kolo 10 Apr '18

10 Apr '18

We run unprivileged lxc containers (libvirt based) with next config: ... <idmap> <uid start='0' target='65535' count='65535'/> <gid start='0' target='65535' count='65535'/> </idmap> ... <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/var/lib/libvirt/lxc/test1'/> <target dir='/'/> </filesystem> ... </devices> Before start we need mount container's LVM: mount /dev/data/test1 /var/lib/libvirt/lxc/test1 And shift uid/gid: ./uidmapshift -b /var/lib/libvirt/lxc/test1 0 65535 65535 (uidmapshift.c is simple utility, found in LXD community) As result, our FS permissions look from hardware node as: [root(a)ops-node01.infra]# ls -la /var/lib/libvirt/lxc/test1/ total 8 dr-xr-xr-x 19 65535 65535 275 Apr 9 18:55 . drwxrwxrwx 3 root root 26 Apr 9 19:32 .. -rw-r--r-- 1 65535 65535 0 Mar 30 18:20 .autorelabel lrwxrwxrwx 1 65535 65535 7 Mar 2 2017 bin -> usr/bin dr-xr-xr-x 2 65535 65535 6 Nov 5 2016 boot drwxr-xr-x 4 65535 65535 206 Mar 30 18:03 dev drwxr-xr-x 59 65535 65535 4096 Apr 9 18:57 etc drwxr-xr-x 2 65535 65535 6 Nov 5 2016 home lrwxrwxrwx 1 65535 65535 7 Mar 2 2017 lib -> usr/lib lrwxrwxrwx 1 65535 65535 9 Mar 2 2017 lib64 -> usr/lib64 drwxr-xr-x 2 65535 65535 6 Nov 5 2016 media drwxr-xr-x 2 65535 65535 6 Nov 5 2016 mnt drwxr-xr-x 2 65535 65535 6 Apr 9 18:55 .oldroot drwxr-xr-x 3 65535 65535 24 Mar 2 2017 opt dr-xr-xr-x 2 65535 65535 6 Nov 5 2016 proc dr-xr-x--- 4 65535 65535 172 Apr 9 18:57 root drwxr-xr-x 13 65535 65535 178 Mar 30 18:03 run lrwxrwxrwx 1 65535 65535 8 Mar 2 2017 sbin -> usr/sbin drwxr-xr-x 2 65535 65535 21 Mar 30 18:03 selinux drwxr-xr-x 2 65535 65535 6 Nov 5 2016 srv dr-xr-xr-x 2 65535 65535 6 Nov 5 2016 sys drwxrwxrwt 7 65535 65535 93 Apr 6 21:08 tmp drwxr-xr-x 13 65535 65535 155 Mar 2 2017 usr drwxr-xr-x 18 65535 65535 254 Mar 30 18:20 var Container running, but some FS objects inside get owner 65534.65534: [root@test1 ~]# find / -uid 65534 -ls | wc -l 40084 It's mostly /sys and /proc objects: [root@test1 ~]# ls -la / total 8 dr-xr-xr-x 19 root root 275 Apr 9 18:55 . dr-xr-xr-x 19 root root 275 Apr 9 18:55 .. -rw-r--r-- 1 root root 0 Mar 30 18:20 .autorelabel drwxr-xr-x 2 root root 6 Apr 9 18:55 .oldroot lrwxrwxrwx 1 root root 7 Mar 2 2017 bin -> usr/bin dr-xr-xr-x 2 root root 6 Nov 5 2016 boot drwxr-xr-x 6 root root 440 Apr 9 20:40 dev drwxr-xr-x 59 root root 4096 Apr 9 18:57 etc drwxr-xr-x 2 root root 6 Nov 5 2016 home lrwxrwxrwx 1 root root 7 Mar 2 2017 lib -> usr/lib lrwxrwxrwx 1 root root 9 Mar 2 2017 lib64 -> usr/lib64 drwxr-xr-x 2 root root 6 Nov 5 2016 media drwxr-xr-x 2 root root 6 Nov 5 2016 mnt drwxr-xr-x 3 root root 24 Mar 2 2017 opt dr-xr-xr-x 348 65534 65534 0 Apr 9 20:40 proc dr-xr-x--- 4 root root 172 Apr 9 18:57 root drwxrwxrwt 15 root root 360 Apr 9 20:40 run lrwxrwxrwx 1 root root 8 Mar 2 2017 sbin -> usr/sbin drwxr-xr-x 2 root root 21 Mar 30 18:03 selinux drwxr-xr-x 2 root root 6 Nov 5 2016 srv dr-xr-xr-x 13 65534 65534 0 Apr 9 20:40 sys drwxrwxrwt 7 root root 93 Apr 6 21:08 tmp drwxr-xr-x 13 root root 155 Mar 2 2017 usr drwxr-xr-x 18 root root 254 Mar 30 18:20 var [root@test1 ~]# find /sys/ -uid 65534 -ls | wc -l 36871 [root@t1 ~]# find /proc -uid 65534 -ls | wc -l 3200 [root@test1 ~]# find /dev -uid 65534 -ls 2121875 0 drwxrwxrwt 2 65534 65534 40 Apr 10 13:57 /dev/mqueue It's feature ? Look like libvirt make all this objects from real root with owner root.root You can't call virLXCControllerSetupUserns() before make this objects, right ? Because you need root permissions for some operations. After you set uid range for process 65535-131070, we can't show object with uid.gid 0 and then kernel use values from /proc/sys/kernel/overflowuid and /proc/sys/kernel/overflowgid. It's can probably affect some process in container ? As solution is shift uid/gid _after_ make all objects and _before_ enter userNS ? As workaround we can try set 0 for overflowuid and overflowgid p.s. We use type='mount' instead type='block' because in unprivileged container mount() call failed, more detailes in https://bugzilla.redhat.com/show_bug.cgi?id=1328946 b.r. Maxim Kozin

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[libvirt-users] nm-bridge & nm-team and no connection.
by lejeczek 09 Apr '18

09 Apr '18

hi guys I have a kvm quest & two nodes. a kvm guest on nodeA and IPaddr2 on nodeB(at this time) nodeA & nodeB comprise a HA cluster now... - nodeA can ping IPaddr2 IP - nodeB can ping kvm guest IP - kvm guest can get to nodeB's IP but* Only a bit non-common bit in my setup is: - both nodeA & nodeB be interfaces which are relevant to the subnet on which it operates are NetworkManger bridges put on top of NM team devices, like: ifaceSlaveA + ifaceSlaveB = teamInt = bridgeInt But maybe it's common, maybe many do that(?) And it seems that that "bridge ontop of nm-team" is doing something not... well, not doing something(?) *but - If I do not nmcli c d & nmcli c u on that nm-bridge before I start kvm guest then all nodes, except for the host to the guest, cannot get to kvm-guest's IP which is on the hosts' bridge network. I did that and then... I reboot kvm guest and.. again cannot ping between kvm guest and other nodes. bit tricky, how would you trouble shoot it? Where to start? many thanks, L.

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[libvirt-users] Permissions and ownership on /dev/kvm keep reverting after starting a vm
by TomK 06 Apr '18

06 Apr '18

Hey guys, /dev/kvm permissions and ownership keeps reverting after starting a vm. The ownership and permissions keep going back to crw-rw—— root root .... After starting a vm. I have to revert the perms and ownership to: crw-crw-crw root kvm .... To start any vm but it goes back to the first set of permissions as soon as I start another vm. Wondering what could be doing this? Cheers, Tom Sent from my iPhone

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