- Users - libvirt List Archives

[libvirt-users] network configuration for guest specific dns-servers
by David Ayers 13 Sep '17

13 Sep '17

Hello, similar to how one can configure guest specific IP addresses via mac addresses: <ip address="192.168.122.1" netmask="255.255.255.0" localPtr="yes"> <dhcp> <range start="192.168.122.100" end="192.168.122.254"/> <host mac="00:16:3e:77:e2:ed" name="foo.example.com" ip="192.168.122.10"/> <host mac="00:16:3e:3e:a9:1a" name="bar.example.com" ip="192.168.122.11"/> </dhcp> </ip> We would like to configure guest specific dns-servers as would be done with the --dhcp-option of dnsmasq. I was expecting to be able to do something like: <host mac="00:16:3e:77:e2:ed" name="foo.example.com" ip="192.168.122.10" dhcp-option="dns-server,127.0.0.1" /> but it seems that this isn't the correct approach, as virsh net-edit default removes that attribute definition. Could someone point me to the correct documentation? Thank you! David Ayers -- David Ayers - Team Austria Free Software Foundation Europe (FSFE) [] (http://www.fsfe.org) Join the Fellowship of FSFE! [][][] (https://fsfe.org/join) Your donation powers our work! || (http://fsfe.org/donate)

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[libvirt-users] external snapshot is missing object secrets
by Markus Schade 13 Sep '17

13 Sep '17

Hello, I have virtual machines running with a ceph storage backend. When creating an external qcow2 snapshot with a libvirt version without support for the new object secret passing, the backing file info would list the ceph secret in plain,e.g. # virsh snapshot-create-as vm-123 --no-metadata --disk-only --diskspec sda,file=/var/lib/libvirt/qemu/snapshot/vm-123-wrapper.qcow2 # qemu-img info /var/lib/libvirt/qemu/snapshot/vm-123-wrapper.qcow2 ... backing file: rbd:vms_pool0/disk-123:id=libvirt:key=SECRET:auth_supported=cephx\;none:mon_host=192.168.1.1\:6789\;192.168.1.11\:6789\;192.168.1.21\:6789 While this is problematic from a security perspective (and one of the reasons for the new method), it enabled starting the virtual machine again in case it died or got powered off. With the newer libvirt object secret passing the backing file of the qcow image only references the secret id. # qemu-img info /var/lib/libvirt/qemu/snapshot/vm-123-wrapper.qcow2 ... backing file: json:{"driver": "raw", "file": {"password-secret": "scsi0-0-0-0-secret0", "pool": "vms_pool", "image": "disk-123", "driver": "rbd", "user": "libvirt", "=keyvalue-pairs": "[\"auth_supported\", \"cephx;none\", \"mon_host\", \"192.168.1.1:6789;192.168.1.11:6789;192.168.1.21:6789\"]"}} This is fine as long as the virtual machine is running and with qemu-2.10 it is even possible to block-commit this external snapshot (Yeah!). However, should the VM die or be powered off, it is now longer possible to start the domain or at least recover the data: Could not open backing file: No secret with id 'scsi0-0-0-0-secret0' I guess this problems happens with any disk type that is accessed with object secrets, which is why I would consider this a bug. The question is, should/can this be fixed in libvirt or qemu? I think libvirt should create the snapshot file with the object secret stored in a persistent file (and reference this file in the backing file definition) Best regards, Markus

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[libvirt-users] Regarding Libvirt Java Bindings
by Kartik Vaishnav 12 Sep '17

12 Sep '17

I am developing a Java Application using Libvirt. I found that the Java Bindings are not in active development. I need to obtain the IP Address of the Domain. In C, it may relate to virDomainInterfaceAddresses. Is there any way to implement it in Java.

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[libvirt-users] Failed building wheel for libvirt-python
by Silvia Fichera 07 Sep '17

07 Sep '17

Hi all, I'm installing Openstack using devstack netwon branch in my PC with Ubuntu 16.04 and I have this error. Could someone of you help me please? Thanks Collecting libvirt-python===2.1.0 (from -c /opt/stack/requirements/upper-constraints.txt (line 169)) Using cached libvirt-python-2.1.0.tar.gz Building wheels for collected packages: libvirt-python Running setup.py bdist_wheel for libvirt-python ... error Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-g9ai0P/libvirt-python/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmpsHlvcmpip-wheel- --python-tag cp27: running bdist_wheel running build /usr/bin/pkg-config --print-errors --atleast-version=0.9.11 libvirt /usr/bin/python generator.py libvirt /usr/share/libvirt/api/libvirt-api.xml Found 415 functions in /usr/share/libvirt/api/libvirt-api.xml Found 0 functions in libvirt-override-api.xml Generated 344 wrapper functions Missing type converters: virConnectNodeDeviceEventGenericCallback:1 ERROR: failed virConnectNodeDeviceEventRegisterAny error: command '/usr/bin/python' failed with exit status 1 ---------------------------------------- Failed building wheel for libvirt-python Running setup.py clean for libvirt-python Failed to build libvirt-python Installing collected packages: libvirt-python Running setup.py install for libvirt-python ... error Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-g9ai0P/libvirt-python/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-0i4vHi-record/install-record.txt --single-version-externally-managed --compile: running install running build /usr/bin/pkg-config --print-errors --atleast-version=0.9.11 libvirt /usr/bin/python generator.py libvirt /usr/share/libvirt/api/libvirt-api.xml Found 415 functions in /usr/share/libvirt/api/libvirt-api.xml Found 0 functions in libvirt-override-api.xml Generated 344 wrapper functions Missing type converters: virConnectNodeDeviceEventGenericCallback:1 ERROR: failed virConnectNodeDeviceEventRegisterAny error: command '/usr/bin/python' failed with exit status 1 ---------------------------------------- Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-g9ai0P/libvirt-python/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-0i4vHi-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-g9ai0P/libvirt-python/ +inc/python:pip_install:1 exit_trap +./stack.sh:exit_trap:494 local r=1 ++./stack.sh:exit_trap:495 jobs -p +./stack.sh:exit_trap:495 jobs= +./stack.sh:exit_trap:498 [[ -n '' ]] +./stack.sh:exit_trap:504 kill_spinner +./stack.sh:kill_spinner:390 '[' '!' -z '' ']' +./stack.sh:exit_trap:506 [[ 1 -ne 0 ]] +./stack.sh:exit_trap:507 echo 'Error on exit' Error on exit +./stack.sh:exit_trap:508 generate-subunit 1504797369 129 fail +./stack.sh:exit_trap:509 [[ -z /opt/stack/logs ]] +./stack.sh:exit_trap:512 /home/onossona/devstack/tools/worlddump.py -d /opt/stack/logs World dumping... see /opt/stack/logs/worlddump-2017-09-07-151818.txt for details +./stack.sh:exit_trap:518 exit 1 -- Silvia Fichera

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[libvirt-users] snapshot anomaly
by Doug Hughes 30 Aug '17

30 Aug '17

I'm not sure how this snapshot got created, but, I cannot delete it, and its presence prevents me from creating other snapshots. I don't know if it was created by a command gone amok or something else. # virsh snapshot-list serv1r2 Name Creation Time State ------------------------------------------------------------ snap 2017-01-30 17:01:11 -0500 shutoff # virsh snapshot-delete serv1r2 snap --disk-only error: command 'snapshot-delete' doesn't support option --disk-only # virsh snapshot-dumpxml serv1r2 snap <domainsnapshot> <name>snap</name> <state>shutoff</state> <creationTime>1485813671</creationTime> <memory snapshot='no'/> <disks> <disk name='vda' snapshot='external' type='file'> <driver type='qcow2'/> <source file='/*var/lib/libvirt/images/serv1r2-savesnap.qcow2'/*> </disk> <disk name='fda' snapshot='no'/> <disk name='hda' snapshot='no'/> </disks> # ls -l /var/lib/libvirt/images/serv1r2-savesnap.qcow2 ls: cannot access /var/lib/libvirt/images/serv1r2-savesnap.qcow2: No such file or directory # virsh snapshot-create-as --domain serv1r2 snap --diskspec vda,file=/var/lib/libvirt/flashimages/serv1r2-snap.qcow2 --disk-only --atomic --no-metadata --quiesce error: internal error: unexpected domain snapshot snap already exists # virsh snapshot-revert serv1r2 snap error: unsupported configuration: revert to external snapshot not supported yet Any idea for breaking out of this box? -- Doug Hughes Keystone NAP Fairless Hills, PA 1.844.KEYBLOCK (539.2562)

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[libvirt-users] duplicated notifications for suspend and resume
by Naud, AntoineX 28 Aug '17

28 Aug '17

Hello, I am using domain event notifications from libvirt-event API in my application and it seems to work fine, except for 'suspend' and 'resume' events where I keep receiving duplicated notifications. Similarly, the example provided with libvirt (in examples/object-events/event-test) also produces twice as much notifications for 'suspend' and 'resume' than for other events. Here is the sequence of virsh commands and the output of event-test: Virsh start Fed25 Virsh suspend Fed25 Virsh resume Fed25 Virsh shutdown Fed25 [~/libvirt-3.4.0/examples/object-events] ./event-test qemu:///system Registering event callbacks myNodeDeviceEventCallback EVENT: Node device net_vnet0_fe_54_00_a0_ba_61 Created 0 myDomainEventCallback1 EVENT: Domain Fed25(1) Resumed Unpaused myDomainEventCallback2 EVENT: Domain Fed25(1) Resumed Unpaused myDomainEventCallback1 EVENT: Domain Fed25(1) Started Booted myDomainEventCallback2 EVENT: Domain Fed25(1) Started Booted myDomainEventCallback1 EVENT: Domain Fed25(1) Suspended Paused myDomainEventCallback2 EVENT: Domain Fed25(1) Suspended Paused myDomainEventCallback1 EVENT: Domain Fed25(1) Suspended Paused myDomainEventCallback2 EVENT: Domain Fed25(1) Suspended Paused myDomainEventCallback1 EVENT: Domain Fed25(1) Resumed Unpaused myDomainEventCallback2 EVENT: Domain Fed25(1) Resumed Unpaused myDomainEventCallback1 EVENT: Domain Fed25(1) Resumed Unpaused myDomainEventCallback2 EVENT: Domain Fed25(1) Resumed Unpaused myDomainEventCallback1 EVENT: Domain Fed25(1) Shutdown Finished myDomainEventCallback2 EVENT: Domain Fed25(1) Shutdown Finished myNodeDeviceEventCallback EVENT: Node device net_vnet0_fe_54_00_a0_ba_61 Deleted 0 Note that the 2 lines printed for each event are ok since 2 callbacks are registered in the example. Has anybody else faced this issue? I am using libvirt-3.6.0 on Ubuntu 16.04. Best regards, Antoine -------------------------------------------------------------- Intel Research and Development Ireland Limited Registered in Ireland Registered Office: Collinstown Industrial Park, Leixlip, County Kildare Registered Number: 308263 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.

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[libvirt-users] libvirt event
by llilulu 28 Aug '17

28 Aug '17

libvirt version: 3.4.0 When use libvirt event in program, if I create more than one thread loop call virEventRunDefaultImp(), Is this invocation correct. If correct ,what happen when event occur.is many thread process event? If I invocation virEventRegisterDefault before any hypervisor connect, and invocation virEventRunDefaultImp.Then I connect a hypervisor(qemu) and register some event on this connection. I connect another hypervisor(lxc), before lxc connection, I reinvocation virEventRegisterDefault and virEventRunDefaultImp, Is this operate correct?What happen after that? Thanks

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[libvirt-users] dump in virEventPollRunOnce
by llilulu 28 Aug '17

28 Aug '17

libvirt version: 3.4.0 architecture: x86_64 ubuntu16.04-server hypervisor: kvm,qemu My program use libvirt event , the program is a module(.so) file in cloud application, when unload the module, program will dump in virEventPoolRunOnce call. program frame virInitialize virEventAddTimeOut virEventRunDefaultImpl virConnectXXX virConnectDomainEventRegisterAny ... virConnectDomainEventDeregisterAny ... when unload the module will dump , the gdb bt commad output is [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `/usr/local/lssa/bin/lssa -f'. Program terminated with signal SIGSEGV, Segmentation fault. ---Type <return> to continue, or q <return> to quit--- #0 0x00007f9a3e9fc2f2 in ?? () [Current thread is 1 (Thread 0x7f9a39349700 (LWP 2897))] (gdb) bt #0 0x00007f9a3e9fc2f2 in ?? () #1 0x00007f9a3e1728bd in virEventPollRunOnce () from /usr/lib/libvirt.so.0 #2 0x00007f9a3e171391 in virEventRunDefaultImpl () from /usr/lib/libvirt.so.0 #3 0x00007f9a3e9fbc16 in ?? () #4 0x0000000000000000 in ?? () (gdb) Thanks

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[libvirt-users] vm in qcow2 runs on host A but not on host B
by Marko Weber 25 Aug '17

25 Aug '17

hello, a vm in format qcow2 on host A (Intel Xeon CPU E5-1650 v4) do not start on host B ( Intel Core i7-2600 CPU @ 3.40GHz ) i get on host B by starting the vm "trap errors" Opcode. anyone here has an idea how to solve this? kind regards marko -- zbfmail - Mittendrin statt nur Datei! OpenDKIM, SPF, DSPAM, Greylisting, POSTSCREEN, AMAVIS, Mailgateways Mailfiltering, SMTP Service, Spam Abwehr, MX-Backup, Mailserver Backup Redundante Mailgateways, HA Mailserver, Secure Mailserver

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[libvirt-users] NTP traffic blocked
by Sinan Polat 24 Aug '17

24 Aug '17

I have multiple VM's on the same KVM host. One of the VM's is running NTP. All VM's can reach eachother, no firewall in between. But the problem is, the VM's cannot communicate over port 123/udp to the NTP VM. Network: 172.24.100.0/22 KVM: 172.24.101.50 VM ntp: 172.24.102.10 VM foo: 172.24.102.20 1. On the NTP server, listen for any incoming packets from VM foo on port 123: [ntp ~]# tcpdump -i any host 172.24.102.20 and port 123 -n 2. Execute the following on server foo. Since server ntp is listening with tcpdump, packets should be visible in tcpdump. [foo ~]# ntpdate 172.24.102.10 This is failing: ntpdate[30443]: no server suitable for synchronization found No packets are coming in to the ntp server, tcpdump is just blank. Weird. To troubleshoot further, start over and do the following: [ntp ~]# tcpdump -i any host 172.24.102.20 and port 123 -n ## Listen for packets filtering host 172.24.102.20 and port 123 [foo ~]# tcpdump -i any host 172.24.102.10 and port 123 -n ## Listen for packets filtering host 172.24.102.10 and port 123 While both tcpdumps are running, execute the following: [foo ~]# ntpdate 172.24.102.10 Now, on the tcpdump of VM foo, you will see outgoing packets: 19:45:26.644630 IP 172.24.102.20.ntp > 172.24.102.10.ntp: NTPv4, Client, length 48 As you can see, packets are exiting the server, but there is no response. And the tcpdump of the ntp server is still empty, it doesn't receive the packets (so, it won't reply). But why? Lets troubleshoot further and run ntpdate in debugging mode: [foo ~]# ntpdate -dv 172.24.102.10 22 Aug 19:51:23 ntpdate[30465]: ntpdate 4.2.6p5(a)1.2349-o Wed Mar 1 09:00:52 UTC 2017 (1) Looking for host 172.24.102.10 and service ntp host found : some-host.com transmit(172.24.102.10) receive(172.24.102.10) transmit(172.24.102.10) receive(172.24.102.10) server 172.24.102.10, port 123 22 Aug 19:51:29 ntpdate[30465]: step time server 172.24.102.10 offset 1.414813 sec Wow it worked!? But it only works with the "-d" option. What is the difference between normal and debgging mode? Lets have a closer look; without the "-d" option, the src and dest ports are 123. When using the "-d" option, the src port is not 123 (it is a random high port number). On the KVM host and on the VM's there is no firewall active, even if there was a firewall, in tcpdump the packets should have been shown. Anyone who can help? Thanks! Sinan

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