- Users - libvirt List Archives

[libvirt-users] Libvirt not terminating SSH processes
by Priyanka Gupta 09 Jan '18

09 Jan '18

Hi LibVirt team, I am facing an issue with libvert. I am closing a "qemu+ssh" connection but the initiated ssh process are going into sleep mode and not getting killed upon closing the connection. Can you please help me figure out the issue ? -- With Kind Regards Priyanka Gupta

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[libvirt-users] Cannot Write xvga=yes in xml file
by Rogue S.T 06 Jan '18

06 Jan '18

Hello,my system info: virsh verison Compiled against library: libvirt 3.9.0 Using library: libvirt 3.9.0 Using API: QEMU 3.9.0 Running hypervisor: QEMU 2.10.90 And i want to pass through my gpu to my window 7 guest with <hostdev>, next line is comand i use: <hostdev mode='subsystem' type='pci' managed='yes' xvga='yes'> <source> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </source> <rom bar='on' file='/root/gpu.dump'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </hostdev> But i get this error: XML document failed to validate against schema: Unable to validate doc against /ocl/share/libvirt/schemas/domain.rng Extra element devices in interleave Element domain failed to validate content If i delete xvga='yes',it's ok, but i get a other question, my display is not light.

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[libvirt-users] libvirt net xml format
by Bhasker C V 05 Jan '18

05 Jan '18

Hi all, I went through the docs but could not find a way to pass the -h OR --no-hosts option to dnsmasq via libvirt xml Is there a way to do this via xml ? please can someone help. Thanks

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[libvirt-users] Using Intel Quick-Sync with GPU capable Intel CPUs
by Benjammin2068 04 Jan '18

04 Jan '18

Rogue S.T asked about checking out graphics cards which brought the question to me... Is it possible to make Intel on-CPU GPU resources to Windows 10? (the box I'm working with has Xeon E5-2640v4 CPUs which should be QuickSync capable) What else do I have to do to take advantage of this? Just load the drivers? Thanks, -Ben

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[libvirt-users] questions about disk auth element for Backing Chain
by Meina Li 03 Jan '18

03 Jan '18

Hi, I am a libvirt qe, I am testing the function about the new location of disk auth element (as sub-element of the source element) in Backing Chain Management. And I have a questions: When all the backing chain are iscsi network disk type(no matter if the authentication is exist), start the guest , it will only has the top level disk in xml and there are no other backingStore in it. The test step is below. So can this function support all backing chain with network disk type actually, or only use network authentication as the base image for backing chain of file disk type? Can you help reviewing it? Thanks very much in advance! Test step: 1. iSCSI server: o- iscsi ............................................................................................................ [Targets: 2] | o- iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.9cba196611e6 ....................................................... [TPGs: 1] | | o- tpg1 ..................................................................................... [gen-acls, tpg-auth, 1-way auth] | | o- acls .......................................................................................................... [ACLs: 0] | | o- luns .......................................................................................................... [LUNs: 4] | | | o- lun0 ................................................................ [fileio/file1 (/tmp/lun1.img) (default_tg_pt_gp)] | | o- portals .................................................................................................... [Portals: 1] | | o- 0.0.0.0:3260 ..................................................................................................... [OK] | o- iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.a8d92ebb4ece ....................................................... [TPGs: 1] | o- tpg1 .................................................................................................. [gen-acls, no-auth] | o- acls .......................................................................................................... [ACLs: 0] | o- luns .......................................................................................................... [LUNs: 3] | | o- lun0 ................................................................ [fileio/file3 (/tmp/lun3.img) (default_tg_pt_gp)] | o- portals .................................................................................................... [Portals: 1] | o- 0.0.0.0:3260 ..................................................................................................... [OK] 2. Set iscsi secret. # cat iscsi-secret.xml <secret ephemeral='no' private='yes'> <description>iSCSI secret</description> <usage type='iscsi'> <target>libvirtiscsi</target> </usage> </secret> # virsh secret-define iscsi-secret.xml Secret 47bd2f3e-023f-44ba-85a3-e8fa7f16ff23 created # MYSECRET=`printf %s "redhat" | base64` # virsh secret-set-value 47bd2f3e-023f-44ba-85a3-e8fa7f16ff23 $MYSECRET Secret value set 3. Create backing chain. # qemu-img create -f qcow2 -b iscsi:// redhat:redhat@10.66.7.27:3260/iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.9cba196611e6/0 iscsi:// 10.66.7.27:3260/iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.a8d92ebb4ece/0 -o backing_fmt=qcow2 4. Start guest. # qemu-img info iscsi:// 10.66.7.27:3260/iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.a8d92ebb4ece/0 --backing-chainimage: json:{"driver": "qcow2", "file": {"lun": "0", "portal": "10.66.7.27:3260", "driver": "iscsi", "transport": "tcp", "target": "iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.a8d92ebb4ece"}} file format: qcow2 virtual size: 5.0G (5368709120 bytes) disk size: unavailable cluster_size: 65536 backing file: iscsi:// redhat:redhat@10.66.7.27:3260/iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.9cba196611e6/0 backing file format: qcow2 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false image: json:{"driver": "qcow2", "file": {"lun": "0", "portal": " 10.66.7.27:3260", "driver": "iscsi", "transport": "tcp", "user": "redhat", "password": "redhat", "target": "iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.9cba196611e6"}} file format: qcow2 virtual size: 5.0G (5368709120 bytes) disk size: unavailable cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false # virsh dumpxml rhel7 | grep disk -A 9 ... <disk type='network' device='disk'> <driver name='qemu' type='qcow2'/> <source protocol='iscsi' name='iqn.2003-01.org.linux-iscsi.localhost.x8664:sn.a8d92ebb4ece/0'> <host name='10.66.7.27' port='3260'/> </source> <target dev='vdb' bus='virtio'/> <alias name='virtio-disk1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </disk> ... Best Regards Meina Li

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[libvirt-users] [BUG] Not exiting media forced a promptly close of libvirt 3.10
by Holger Schranz 29 Dec '17

29 Dec '17

Hello, In the .xml file I use a media which is no longer available. In the past, I got the information media not available and the creation of the VM was stopped - O.k. behavior. Since 3.10 the libvirtd stopped promptly and all open consoles windows and the virt-manager closed promptly. For diagnose: etcsvms1:/kvm/CS8200/M5 # coredumpctl TIME PID UID GID SIG PRESENT EXE Fri 2017-12-22 08:16:35 CET 7056 0 0 11 * /usr/local/sbin/libvirtd Fri 2017-12-22 08:19:46 CET 10611 0 0 11 * /usr/local/sbin/libvirtd Fri 2017-12-22 09:28:48 CET 10728 0 0 11 * /usr/local/sbin/libvirtd etcsvms1:/kvm/CS8200/M5 # coredumpctl info libvirtd . . . PID: 10728 (libvirtd) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2017-12-22 09:28:39 CET (15min ago) Command Line: /usr/local/sbin/libvirtd -d Executable: /usr/local/sbin/libvirtd Control Group: / Slice: -.slice Boot ID: 01603763bc784c7380e310d5eea124d6 Machine ID: 89c660865c00403a9bacef32b6828556 Hostname: etcsvms1 Coredump: /var/lib/systemd/coredump/core.libvirtd.0.01603763bc784c7380e310 Message: Process 10728 (libvirtd) of user 0 dumped core. etcsvms1:/kvm/CS8200/M5 # coredumpctl dump libvirtd PID: 10728 (libvirtd) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2017-12-22 09:28:39 CET (16min ago) Command Line: /usr/local/sbin/libvirtd -d Executable: /usr/local/sbin/libvirtd Control Group: / Slice: -.slice Boot ID: 01603763bc784c7380e310d5eea124d6 Machine ID: 89c660865c00403a9bacef32b6828556 Hostname: etcsvms1 Coredump: /var/lib/systemd/coredump/core.libvirtd.0.01603763bc784c7380e310d5eea124d6.10728.1513931319000000.xz Message: Process 10728 (libvirtd) of user 0 dumped core. Refusing to dump core to tty. etcsvms1:/kvm/CS8200/M5 # coredumpctl gdb libvirtd PID: 10728 (libvirtd) UID: 0 (root) GID: 0 (root) Signal: 11 (SEGV) Timestamp: Fri 2017-12-22 09:28:39 CET (18min ago) Command Line: /usr/local/sbin/libvirtd -d Executable: /usr/local/sbin/libvirtd Control Group: / Slice: -.slice Boot ID: 01603763bc784c7380e310d5eea124d6 Machine ID: 89c660865c00403a9bacef32b6828556 Hostname: etcsvms1 Coredump: /var/lib/systemd/coredump/core.libvirtd.0.01603763bc784c7380e310d5eea124d6.10728.1513931319000000.xz Message: Process 10728 (libvirtd) of user 0 dumped core. GNU gdb (GDB; openSUSE Leap 42.3) 8.0.1 Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-suse-linux". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://bugs.opensuse.org/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/local/sbin/libvirtd...done. [New LWP 10729] [New LWP 10731] [New LWP 10733] [New LWP 10735] [New LWP 10732] [New LWP 10739] [New LWP 10730] [New LWP 10741] [New LWP 10743] [New LWP 10734] [New LWP 10736] [New LWP 11276] [New LWP 10737] [New LWP 10738] [New LWP 10728] [New LWP 10740] [New LWP 10751] [New LWP 10742] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `/usr/local/sbin/libvirtd -d'. Program terminated with signal SIGSEGV, Segmentation fault. #0 virStorageFileReportBrokenChain (errcode=2, src=src@entry=0x7f0d4004ac40, parent=0x7f0d4004ac40) at storage/storage_source.c:422 422 unsigned int access_user = src->drv->uid; [Current thread is 1 (Thread 0x7f0d525ab700 (LWP 10729))] Missing separate debuginfos, use: zypper install device-mapper-debuginfo-1.02.97-77.1.x86_64 glibc-debuginfo-2.22-8.4.x86_64 krb5-debuginfo-1.12.5-12.1.x86_64 libapparmor1-debuginfo-2.10.3-16.1.x86_64 libavahi-client3-debuginfo-0.6.32-3.5.x86_64 libavahi-common3-debuginfo-0.6.32-3.5.x86_64 libblkid1-debuginfo-2.29.2-5.1.x86_64 libcap2-debuginfo-2.22-18.16.x86_64 libcom_err2-debuginfo-1.42.11-15.1.x86_64 libcurl4-debuginfo-7.37.0-23.1.x86_64 libdbus-1-3-debuginfo-1.8.22-5.1.x86_64 libffi4-debuginfo-5.3.1+r233831-10.1.x86_64 libgmp10-debuginfo-5.1.3-7.15.x86_64 libgnutls28-debuginfo-3.3.27-1.5.x86_64 libhogweed2-debuginfo-2.7.1-12.1.x86_64 libidn11-debuginfo-1.28-8.3.x86_64 libkeyutils1-debuginfo-1.5.9-7.13.x86_64 libldap-2_4-2-debuginfo-2.4.44-18.1.x86_64 liblzma5-debuginfo-5.2.2-3.15.x86_64 libnettle4-debuginfo-2.7.1-12.1.x86_64 libnl1-debuginfo-1.1.4-6.13.x86_64 libopenssl1_0_0-debuginfo-1.0.2j-16.1.x86_64 libp11-kit0-debuginfo-0.20.7-1.2.x86_64 libpciaccess0-debuginfo-0.13.4-4.3.x86_64 libpcre1-debuginfo-8.39-11.1.x86_64 libsasl2-3-debuginfo-2.1.26-14.1.x86_64 libselinux1-debuginfo-2.5-4.17.x86_64 libssh2-1-debuginfo-1.4.3-18.3.x86_64 libtasn1-6-debuginfo-4.9-1.2.x86_64 libudev1-debuginfo-228-38.1.x86_64 libuuid1-debuginfo-2.29.2-5.1.x86_64 libxml2-2-debuginfo-2.9.4-12.1.x86_64 libyajl2-debuginfo-2.0.1-21.3.x86_64 libz1-debuginfo-1.2.8-13.15.x86_64 (gdb) Best regards Holger --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. https://www.avast.com/antivirus

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[libvirt-users] libvirt-lxc nested containers
by ooth suresh 14 Dec '17

14 Dec '17

Hi, I am using libvirt to launch lxc containers. I would like to know if I can spawn nested container using libvirt-lxc. Is it supported ? Can some please shed some light on this ? Any pointers will be very helpful. Thanks Suresh S ‌

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[libvirt-users] Inter Shared Memory ( Ivshmem ) : Cannot Bind
by Rogue S.T 13 Dec '17

13 Dec '17

Hello, friends. I encounter a problem when i use ivshmem with my guest, my ivshmem server is not start, and output a error : Example code, do not use in production ,cannot bind. Detail distribution: Today, I know ivshmem from a topic "QEMU version 2.10.93 User Documentation", Ivshmem: it can create a shared memory that guest device use, so we can use this memory to do something ourselves. First, I create host memory backend: -object memory-backend-file,size=1M,share,mem-path=/dev/shm/ivshmem,id=hostmem Twice, Bind a shared memory device to my guest: -device ivshmem-plain,memdev=hostmem Then I boot ivshmem servi ivshmem-server -p /var/run/ivshmem-server.pid -S /tmp/ivshmem_socket -M ivshmem -m /dev/shm -l 1M -n 2 Next time i get this error: *** Example code, do not use in production *** cannot bind And i search the problem on google, but nothing to get, hope you can help me solve it. following message is my host environment: host: ubuntu 1604 qemu: version 2.10.90 (v2.11.0-rc0-dirty) libvirt: libvirtd (libvirt) 3.9.0 guest: window 7 professor Refer: https://qemu.weilnetz.de/doc/qemu-doc.html#Inter_002dVM-Shared-Memory-device (topic qemu documention) https://helpmanual.io/help/ivshmem-server/ ( how to use ivshmem-server )

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[libvirt-users] libvirt authentication
by Anastasiya Ruzhanskaya 11 Dec '17

11 Dec '17

Hello, I am currently trying to install certificates for tls. By this time I have got some questions: 1) Is documentation in the web docs up-to-date regarding tls server, client, ca certificates? (actually I have some problems, but maybe this is due to smth has changed in certtools and was not updated in docs, perhaps some more fields are needed now). 2) there is a error in virt-pki-validate : when determining whether host name matches CN name you assume, that CN is standing in the end. So I get an error: The server certificate does not seem to match the host name hostname: "barni" Server certificate CN: "barni,O=libvirt.org" CN field is standing at the beginning of line. Seems that these are the appropriate lines in code: 258 S_HOST=`"$CERTOOL" -i --infile "$LIBVIRT/servercert.pem" | grep Subject: | sed 's+.*CN=$[a-zA-Z\. _-]*$+\1+'` 259 if test "$S_HOST" != "`hostname -s`" && test "$S_HOST" != "`hostname`"

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[libvirt-users] libvirt error messages
by Anastasiya Ruzhanskaya 11 Dec '17

11 Dec '17

Hello, I am experimenting with libvirt for my diploma. I set up an environment, where I can stop, resend, generate messages for libvirt. I am capable also standing between client and server and analyze the number of current procedure and decide what to do next ( I mean rpc procedure). So, for example I want to always drop creating snapshots and send an error to client with my custom message (NOT custom error type, but exactly custom message, I don't want to modify any libvirt code on client and adding my errors). I am operating with bare tcp traffic, so I can easily read everything in the middle. So, I noticed one error for libvirt snapshots: 'internal error: unexpected domain snapshot snapshot1 already exists' and started sending it every time I see procedure : REMOTE_PROC_DOMAIN_SNAPSHOT_CREATE_XML I thought, that this is possible to insert custom message here, but this is not true. When I change the length of the message on one symbol - it is still correct, on two -also , on three symbols - I get an error that the size of the payload is incorrect. Some other errors when I insert a message of random length. What is strange, that if I insert 'xxxxxxxxxxxxx...' message , which has the same length as 'internal error: unexpected domain snapshot snapshot1 already exists' - everything is parsed fine. So, how does this stuff work? Are there anywhere predefined lengths for error messages and checks against them, or are there checks against exact error strings? How all this stuff is regulated? I know now, that I can pad my message with ...say, space symbols and it will be ok, but I want to know how error parsing works in all cases. I have looked through files, where an overall structure and logic of errors is described but didn't find any helpful information. And I don't a good way to debug libvirt to see, where this happens.

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