- Users - libvirt List Archives

[libvirt-users] libvirt failed to respond after quite a few vnet bridges were created
by Yih Chuang 09 Sep '12

09 Sep '12

During concurrent 80 VM creation, each VM takes two network connections, libvirtd failed to respond. Neither restart libvirtd nor restart CIMOM helped. There were 152 vnet bridges found on this RHEL KVM host. After all the vnet bridges were manually removed, libvirtd responded normally again. Is there a known issue about the number limit of vnet bridges regarding libvirtd? Thank you. --Yih

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[libvirt-users] boot device
by vivek hari 07 Sep '12

07 Sep '12

Hi, I am trying to create a guest machine on xen virtualized environment and install rhel on it by booting from cdrom. I face a issue in booting device. I gave boot order as hd,cdrom. When doing maiden installation, it will find nothing in hard disk and boots from cd. Once installation is completed and when it boots next time it boots from hard disk. It is the expected behaviour. But it fails to boot from hard disk and again boots from cdrom. I also tried specifying per boot device option. I specified disk image as boot order 1 and cd image as boot order 2. But when i power on for the first time, it tries to boot from harddisk and finds nothing there and says " No bootable device. Going to power off in 30 seconds". But expected is, it should boot from cd after trying hard disk. Below is my domain configuration xml file i used to create guest domain. <domain type='xen'> <name>vm-2</name> <memory>1048576</memory> <vcpu>1</vcpu> <os> <type arch='x86_64'>hvm</type> <loader>/usr/lib/xen/boot/hvmloader</loader>  </os> <features> <acpi/> <apic/> <pae/> </features> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/lib/xen/bin/qemu-dm</emulator> <disk type='file' device='disk'> <source file='/var/lib/libvirt/images/vm-2.img'/> <target dev='xvda' bus='ide' /> <boot order='1'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <source file='/var/lib/libvirt/images/Rhel53.iso'/> <target dev='hdc' bus='ide' /> <boot order='2'/> <readonly/> <address type='drive' controller='0' bus='1' target='0' unit='0' /> </disk> <interface type='bridge'> <source bridge='br0'/> </interface> <graphics type='vnc' port='-1' autoport='yes'/> </devices> </domain> I don't know where i am going wrong. So need help in resolving this issue. Thanks,

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[libvirt-users] Live Block Migration with additional attached storage
by Chun-Hung Chen 07 Sep '12

07 Sep '12

Dear all, I am planning to use live block migration with one VM running on local disk and also attached additional disk from iSCSI or other shared storage. When block migration, not only local VM disk is copied to the destination but also the attached additional disk from shared storage. It is not desired in this situation. I just want the local VM disk is copied. Is there anyway to do this scenario? Does the concept of storage pool help this? I browse the source code but don't find hints right now. Thanks. Regards, Arnose

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[libvirt-users] QEMU cmdline for default -smp reasonable (qemuBuildSmpArgs) ?
by sanjay 07 Sep '12

07 Sep '12

Hi! When only the vCPU tag is specified, libvirt by default generates a multi-socket topology(sockets=vCPUs,cores=1,threads=1) for the qemu command line. Is there a specific reason behind choice of this default behavior? Could a default of (socket=1,cores=vCPUs,threads=1) would have been a better choice ? -- Regards, Sanjay

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[libvirt-users] defining directly to the wan/lan
by gary artim 07 Sep '12

07 Sep '12

I have a fedora system configured and running with virsh using kvm/qemu. All I want is to have a fixed ipaddress for that virtual machine. I know that there is the Host and Guest sides to the network. The host has virbr0 interface, which i guess is a bridge. Seem when ever I define a interface to the guest with a type=routed it hoses my other interfaces on the host and requires a console reboot -- completely hanging the network. I'm no networking expert, but there must be a simple N step procedure for defining a static IPaddress to route to a guest machine? Has anyone got this working and have a procedure. My network has 2 nic, eth0 and eth1 (10.0.0.253 and 10.0.1.253), one nic has a route to an nfs machine, the other passes through a linux based router to the wan. I can alias the 10.0.1.253 (eth0) to another address in the subnet, like 10.0.1.251 (eth0:0) and would like to use it in some way to connect to the guest -- I have the nat/routing working fine from the router to eth0:0. The network for libvirt is confusing. It not obvious which side (guest or host) your defining and seem to keep multiple definitions around, even after a restart of libvirtd.service. An help would be great!

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[libvirt-users] problem defining ipaddress
by gary artim 07 Sep '12

07 Sep '12

I have a fedora system configured and running with virsh using kvm/qemu. All I want is to have a fixed ipaddress for that virtual machine. I know that there is the Host and Guest sides to the network. The host has virbr0 interface, which i guess is a bridge. Seem when ever I define a interface to the guest with a type=routed it hoses my other interfaces on the host and requires a console reboot -- completely hanging the network. I'm no networking expert, but there must be a simple N step procedure for defining a static IPaddress to route to a guest machine? Has anyone got this working and have a procedure. My network has 2 nic, eth0 and eth1 (10.0.0.253 and 10.0.1.253), one nic has a route to an nfs machine, the other passes through a linux based router to the wan. I can alias the 10.0.1.253 (eth0) to another address in the subnet, like 10.0.1.251 (eth0:0) and would like to use it in some way to connect to the guest -- I have the nat/routing working fine from the router to eth0:0. The network for libvirt is confusing. It not obvious which side (guest or host) your defining and seem to keep multiple definitions around, even after a restart of libvirtd.service. An help would be great! I have read all the libvirt web info and find it difficult to put the steps together...

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[libvirt-users] Fwd: non-blocking virtConnectOpen
by lulin Fan 06 Sep '12

06 Sep '12

Hi I am writing a web-based management tool for KVM, it will manager a lot of remote KVM host, when user add a new connection from the UI, it will take a long time to open the libvirt connection sometimes due to the network problem, during this progress, the management tool will block the request of other user, it is not a good idea for users. BR Fan On 5 September 2012 14:55, Timon Wang <timonwst(a)gmail.com> wrote: > > > On Wed, Sep 5, 2012 at 11:53 AM, lulin Fan <fan.luliin(a)gmail.com> wrote: > > Hi all, > > > > does anybody know how to do non-blocking virtConnectOpen? does libvirt > > support it or not cause I can't find any document about it? or should I > need > > create a thread to do it? > > It's worth to use non-blocking? What will you do without connect? If it's > not related with libvirt connection, you can do in it in another thread if > you like. > > > > > > Thanks > > > > Fan > > > > _______________________________________________ > > libvirt-users mailing list > > libvirt-users(a)redhat.com > > https://www.redhat.com/mailman/listinfo/libvirt-users > > > > -- > Focus on: Server Vitualization, Network security,Scanner,NodeJS,JAVA,WWW > Blog: http://www.nohouse.net >

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[libvirt-users] non-blocking virtConnectOpen
by lulin Fan 05 Sep '12

05 Sep '12

Hi all, does anybody know how to do non-blocking virtConnectOpen? does libvirt support it or not cause I can't find any document about it? or should I need create a thread to do it? Thanks Fan

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[libvirt-users] virDomainMemoryPeek: bad behavior under workload
by NoxDaFox 04 Sep '12

04 Sep '12

Greetings, I am working on a platform for analysis automation. I need to run several Virtual Environments concurrently and record information about their behavior. I wrote some months ago about the capability of reading the Memory during the Environment's execution (in paused state). What do I need is the complete linear memory image, byte per byte, nothing special; I will give this output to tools and parsers like Volatility to get the value from it. I looked around and the only way to get the memory in such a way is using the QEMU monitor command `pmemsave`. I am using libvirt through its Python bindings and the virDomainQemuMonitorCommand seems not to be exposed by the API so, as suggested in some mails I read into the mailig list, I switched to virDomainMemoryPeek. Using this function keeps up to 14-16 seconds to read 512Mb of memory with the 64Kb limitation and 2-3 seconds with the 1Mb one; but the most annoying thing is that I can't run several environment concurrently as the function keeps failing. Here's the typical output: File "/home/nox/workspace/NOX/src/NOX/hooks.py", line 134, in trigger hook.trigger(event) File "/home/nox/workspace/NOX/src/NOX/hooks.py", line 33, in trigger self.handlers[event]() File "/home/nox/workspace/NOX/hooks/volatility.py", line 81, in memory_dump for block in Memory(self.ctx): File "/home/see/workspace/NOX/src/NOX/lib/libtools.py", line 179, in next libvirt.VIR_MEMORY_PHYSICAL) File "/usr/lib/python2.7/dist-packages/libvirt.py", line 1759, in memoryPeek ret = libvirtmod.virDomainMemoryPeek(self._o, start, size, flags) SystemError: error return without exception set I can't run more than 3 environments concurrently on a Xeon Quad with 8Gb of memory. I guess the RPC reply goes in timeout because the system is under heavy load but I'm not sure as the error output is quite obscure. Is there any solution to this issue? Is it possible to raise the RPC reply timeout value so that, even if slowly, I eventually get the memory dump? If through virsh I use the QEMU `pmemsave` command, I get the memory dump in less than one second; is there any way to obtain the same performance? Thanks anyway for making libvirt the great tool it is! NoxDaFox

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[libvirt-users] Libvirt daemon segfaults when run as root
by Shawn Furrow 04 Sep '12

04 Sep '12

Hi all, For some reason when I run "libvirtd -d" as root it seems to not start. I investigate by running "libvirtd -v" as root and I get a segfault. Here is the output: 2012-08-23 19:01:23.237+0000: 27464: info : libvirt version: 0.10.0 > 2012-08-23 19:01:23.237+0000: 27464: error : virDriverLoadModule:78 : > failed to load module > /usr/local/lib/libvirt/connection-driver/libvirt_driver_qemu.so > /usr/local/lib/libvirt/connection-driver/libvirt_driver_qemu.so: undefined > symbol: virSecurityManagerGetProcessLabel > 2012-08-23 19:01:23.238+0000: 27464: error : virDriverLoadModule:78 : > failed to load module > /usr/local/lib/libvirt/connection-driver/libvirt_driver_lxc.so > /usr/local/lib/libvirt/connection-driver/libvirt_driver_lxc.so: undefined > symbol: virSecurityManagerGetProcessLabel > Caught Segmentation violation dumping internal log buffer: > > ====== start of log ===== > 2012-08-23 19:01:23.235+000027464: debug : main:1120 : Decided on pid file > path '/usr/local/var/run/libvirtd.pid' > 2012-08-23 19:01:23.235+000027464: debug : main:1130 : Decided on socket > paths '/usr/local/var/run/libvirt/libvirt-sock' and > '/usr/local/var/run/libvirt/libvirt-sock-ro' > 2012-08-23 19:01:23.235+000027464: debug : main:1168 : Ensuring run dir > '/usr/local/var/run/libvirt' exists > 2012-08-23 19:01:23.235+000027464: debug : virEventRegisterDefaultImpl:204 > : registering default event implementation > 2012-08-23 19:01:23.235+000027464: debug : virEventPollAddHandle:111 : > Used 0 handle slots, adding at least 10 more > 2012-08-23 19:01:23.235+000027464: debug : virEventPollInterruptLocked:697 > : Skip interrupt, 0 0 > 2012-08-23 19:01:23.236+000027464: debug : virEventPollAddHandle:136 : > EVENT_POLL_ADD_HANDLE: watch=1 fd=5 events=1 cb=0x7f323cd415a0 opaque=(nil) > ff=(nil) > 2012-08-23 19:01:23.236+000027464: debug : virEventRegisterImpl:177 : > addHandle=0x7f323cd423d0 updateHandle=0x7f323cd414a0 > removeHandle=0x7f323cd41360 addTimeout=0x7f323cd42220 > updateTimeout=0x7f323cd415e0 removeTimeout=0x7f323cd41260 > 2012-08-23 19:01:23.236+000027464: debug : virNetServerNew:407 : > srv=0xdd8890 refs=1 > 2012-08-23 19:01:23.236+000027464: debug : main:1206 : Dropping privileges > (if required) > 2012-08-23 19:01:23.236+000027464: debug : virDriverModuleInitialize:53 : > Module dir /usr/local/lib/libvirt/connection-driver > 2012-08-23 19:01:23.236+000027464: debug : virDriverLoadModule:66 : Module > load network > 2012-08-23 19:01:23.236+000027464: debug : virRegisterNetworkDriver:564 : > registering Network as network driver 4 > 2012-08-23 19:01:23.236+000027464: debug : virDriverLoadModule:66 : Module > load storage > 2012-08-23 19:01:23.236+000027464: debug : virRegisterStorageDriver:624 : > registering storage as storage driver 4 > 2012-08-23 19:01:23.236+000027464: debug : virDriverLoadModule:66 : Module > load secret > 2012-08-23 19:01:23.237+000027464: debug : virRegisterSecretDriver:684 : > registering secret as secret driver 3 > 2012-08-23 19:01:23.237+000027464: debug : virDriverLoadModule:66 : Module > load nwfilter > 2012-08-23 19:01:23.237+000027464: debug : virRegisterNWFilterDriver:714 : > registering nwfilter as network filter driver 3 > 2012-08-23 19:01:23.237+000027464: debug : virDriverLoadModule:66 : Module > load qemu > 2012-08-23 19:01:23.237+000027464: error : virDriverLoadModule:78 : failed > to load module > /usr/local/lib/libvirt/connection-driver/libvirt_driver_qemu.so > /usr/local/lib/libvirt/connection-driver/libvirt_driver_qemu.so: undefined > symbol: virSecurityManagerGetProcessLabel > 2012-08-23 19:01:23.238+000027464: debug : virDriverLoadModule:66 : Module > load lxc > 2012-08-23 19:01:23.238+000027464: error : virDriverLoadModule:78 : failed > to load module > /usr/local/lib/libvirt/connection-driver/libvirt_driver_lxc.so > /usr/local/lib/libvirt/connection-driver/libvirt_driver_lxc.so: undefined > symbol: virSecurityManagerGetProcessLabel > 2012-08-23 19:01:23.238+000027464: debug : virDriverLoadModule:66 : Module > load uml > 2012-08-23 19:01:23.238+000027464: debug : virRegisterDriver:732 : > driver=0x7f3232ec7760 name=UML > 2012-08-23 19:01:23.238+000027464: debug : virRegisterDriver:747 : > registering UML as driver 6 > 2012-08-23 19:01:23.238+000027464: debug : virDriverLoadModule:66 : Module > load xen > 2012-08-23 19:01:23.239+000027464: debug : virRegisterDriver:732 : > driver=0x7f3232caad00 name=Xen > 2012-08-23 19:01:23.239+000027464: debug : virRegisterDriver:747 : > registering Xen as driver 7 > 2012-08-23 19:01:23.239+000027464: debug : virNetServerProgramNew:63 : > prog=0xddca40 refs=1 > 2012-08-23 19:01:23.239+000027464: debug : virNetServerProgramRef:84 : > prog=0xddca40 refs=2 > 2012-08-23 19:01:23.239+000027464: debug : virNetServerProgramNew:63 : > prog=0xddcbc0 refs=1 > 2012-08-23 19:01:23.239+000027464: debug : virNetServerProgramRef:84 : > prog=0xddcbc0 refs=2 > 2012-08-23 19:01:23.239+000027464: debug : virEventPollInterruptLocked:697 > : Skip interrupt, 0 0 > 2012-08-23 19:01:23.239+000027464: debug : virEventPollAddHandle:136 : > EVENT_POLL_ADD_HANDLE: watch=2 fd=7 events=1 cb=0x7f323ce241e0 > opaque=0xdd8890 ff=(nil) > 2012-08-23 19:01:23.239+000027464: debug : main:1257 : Attempting to > configure auditing subsystem > 2012-08-23 19:01:23.239+000027464: debug : main:1263 : Proceeding without > auditing > 2012-08-23 19:01:23.239+000027464: debug : virHookCheck:119 : No hook > script /usr/local/etc/libvirt/hooks/daemon > 2012-08-23 19:01:23.239+000027464: debug : virHookCheck:119 : No hook > script /usr/local/etc/libvirt/hooks/qemu > 2012-08-23 19:01:23.239+000027464: debug : virHookCheck:119 : No hook > script /usr/local/etc/libvirt/hooks/lxc > 2012-08-23 19:01:23.239+000027464: debug : daemonSetupNetworking:464 : > Registering unix socket /usr/local/var/run/libvirt/libvirt-sock > 2012-08-23 19:01:23.239+000027464: debug : virNetSocketNew:119 : > localAddr=0x7fff419bf530 remoteAddr=(nil) fd=9 errfd=-1 pid=0 > 2012-08-23 19:01:23.239+000027464: debug : virNetSocketNew:179 : > RPC_SOCKET_NEW: sock=0xddcbf0 refs=1 fd=9 errfd=-1 pid=0 > localAddr=127.0.0.1;0, remoteAddr=(null) > 2012-08-23 19:01:23.239+000027464: debug : virNetSocketRef:713 : > RPC_SOCKET_REF: sock=0xddcbf0 refs=2 > 2012-08-23 19:01:23.239+000027464: debug : virEventPollInterruptLocked:697 > : Skip interrupt, 0 0 > 2012-08-23 19:01:23.239+000027464: debug : virEventPollAddHandle:136 : > EVENT_POLL_ADD_HANDLE: watch=3 fd=9 events=0 cb=0x7f323ce2ab10 > opaque=0xddcbf0 ff=0x7f323ce2ba60 > 2012-08-23 19:01:23.239+000027464: debug : daemonSetupNetworking:474 : > Registering unix socket /usr/local/var/run/libvirt/libvirt-sock-ro > 2012-08-23 19:01:23.239+000027464: debug : virNetSocketNew:119 : > localAddr=0x7fff419bf530 remoteAddr=(nil) fd=10 errfd=-1 pid=0 > 2012-08-23 19:01:23.239+000027464: debug : virNetSocketNew:179 : > RPC_SOCKET_NEW: sock=0xddd430 refs=1 fd=10 errfd=-1 pid=0 > localAddr=127.0.0.1;0, remoteAddr=(null) > 2012-08-23 19:01:23.239+000027464: debug : virNetSocketRef:713 : > RPC_SOCKET_REF: sock=0xddd430 refs=2 > 2012-08-23 19:01:23.239+000027464: debug : virEventPollInterruptLocked:697 > : Skip interrupt, 0 0 > 2012-08-23 19:01:23.239+000027464: debug : virEventPollAddHandle:136 : > EVENT_POLL_ADD_HANDLE: watch=4 fd=10 events=0 cb=0x7f323ce2ab10 > opaque=0xddd430 ff=0x7f323ce2ba60 > 2012-08-23 19:01:23.239+000027464: debug : virNetServerRef:420 : > srv=0xdd8890 refs=2 > 2012-08-23 19:01:23.239+000027464: debug : virNetlinkEventServiceStart:656 > : libnl was not available at build time > 2012-08-23 19:01:23.239+000027464: debug : virNetServerRun:714 : > srv=0xdd8890 quit=0 > 2012-08-23 19:01:23.239+000027464: debug : virEventRunDefaultImpl:244 : > running default event implementation > 2012-08-23 19:01:23.239+000027464: debug : virEventPollCleanupTimeouts:501 > : Cleanup 0 > 2012-08-23 19:01:23.239+000027464: debug : virEventPollCleanupTimeouts:537 > : Found 0 out of 0 timeout slots used, releasing 0 > 2012-08-23 19:01:23.239+000027464: debug : virEventPollCleanupHandles:549 > : Cleanup 4 > 2012-08-23 19:01:23.240+000027464: debug : virEventPollMakePollFDs:378 : > Prepare n=0 w=1, f=5 e=1 d=0 > 2012-08-23 19:01:23.240+000027475: debug : virStateInitialize:798 : > Running global init for Remote state driver > 2012-08-23 19:01:23.240+000027475: debug : virStateInitialize:798 : > Running global init for Network state driver > 2012-08-23 19:01:23.240+000027464: debug : virEventPollMakePollFDs:378 : > Prepare n=1 w=2, f=7 e=1 d=0 > 2012-08-23 19:01:23.240+000027464: debug : virEventPollMakePollFDs:378 : > Prepare n=2 w=3, f=9 e=0 d=0 > 2012-08-23 19:01:23.240+000027464: debug : virEventPollMakePollFDs:378 : > Prepare n=3 w=4, f=10 e=0 d=0 > 2012-08-23 19:01:23.240+000027464: debug : > virEventPollCalculateTimeout:320 : Calculate expiry of 0 timers > 2012-08-23 19:01:23.240+000027464: debug : > virEventPollCalculateTimeout:346 : Timeout at 0 due in -1 ms > 2012-08-23 19:01:23.240+000027464: debug : virEventPollRunOnce:614 : > EVENT_POLL_RUN: nhandles=2 timeout=-1 > > ====== end of log ===== > Segmentation fault/ However, when I run "libvirtd -d" as me, it does not segfault and continues running. However I cannot connect to the libvirt-sock because it gets created at "$HOME/.cache/libvirt/libvirt-sock" but virsh looks for it at "/usr/local/var/run/libvirt-sock". Here is what I get when I run "libvirtd -v" as me: 2012-08-23 19:02:15.145+0000: 27483: info : libvirt version: 0.10.0 > 2012-08-23 19:02:15.145+0000: 27483: error : virDriverLoadModule:78 : > failed to load module > /usr/local/lib/libvirt/connection-driver/libvirt_driver_qemu.so > /usr/local/lib/libvirt/connection-driver/libvirt_driver_qemu.so: undefined > symbol: virSecurityManagerGetProcessLabel > 2012-08-23 19:02:15.145+0000: 27483: error : virDriverLoadModule:78 : > failed to load module > /usr/local/lib/libvirt/connection-driver/libvirt_driver_lxc.so > /usr/local/lib/libvirt/connection-driver/libvirt_driver_lxc.so: undefined > symbol: virSecurityManagerGetProcessLabel Any ideas why this is happening? I am on Ubuntu 10.04 running libvirt 0.10.0 with qemu-kvm 1.1 Thanks, Shawn -- Virginia Tech Bradley Department of Electrical and Computer Engineering B.S. Electrical Engineering B.S. Computer Engineering

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