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[libvirt-users] limit memory and CPU when using libvirt-sandbox
by pablo platt 28 Jan '13

28 Jan '13

I'm considering using virt-sandbox with lxc to sandbox and execute untrusted code like python scripts and compiled C code. Is it possible to limit CPU and Memory like is possible with lxc-execute and a config file? What are the defaults security settings? Is it completely isolated by default? What's the difference between lxc-execute and libvirt-sandbox? How can I use it in ubuntu? Thanks

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[libvirt-users] Not able to do ssh with libvirt
by varun bhatnagar 24 Jan '13

24 Jan '13

Hi, I am having issue while doing *ssh* to a virtual node through libvirt. The nodes's ip address is 192.168.82.1. When I am giving the command it is giving the following error message: *virsh# connect vbox+ssh://192.168.82.1/session* *Password:* *error: Failed to connect to the hypervisor* *error: End of ifle while reading data: sh: nc: command not found: Input/output error.* Can anyone tell me why am I facing this problem and how to resolve it. Thanks in advance.

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[libvirt-users] libvirt -- add virtio-scsi disk with scsi-generic
by 韩诚 24 Jan '13

24 Jan '13

Hi, Paolo, All, I read "virtio-scsi support proposal v2"(http://permalink.gmane.org/gmane.comp.emulators.libvirt/50428) Try to add a virtio-scsi with scsi-generic like this: <hostdev type='scsi'> <source> <adapter name='scsi_host0'/> <address type='scsi' bus='0' target='0' unit='0'/> </source> <target> <address type='scsi' controller='0' bus='0' target='0' unit='2'/> </target> </hostdev> But It turn out to be wrong, showing: error: Failed to define domain from rhel63ga error: XML error: unknown host device source address type 'scsi_host' I'd like to know how shall to add a virtio-scsi disk with scsi-generic option. Thanks~ -- Best regards, Cheng

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[libvirt-users] virtual machine id
by 春祥王 23 Jan '13

23 Jan '13

Below is my start.xml: <domain type='kvm' id='12'> <name>start-ubuntu</name> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>1</vcpu> <os> <type>hvm</type> <boot dev='hd'/> ...... I start the machine virsh create start.xml virsh list Id Name State ---------------------------------------------------- 20 start-ubuntu running I set id=12,but it is actually 20,I don't know why. Thanks.

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Re: [libvirt-users] snapshot troubles
by Christian Schmidt 23 Jan '13

23 Jan '13

Hi Juergen, if you are using kvm/qemu with libvirt you can try to delete the snapshot with the qemu monitor commands. The general syntax is virsh qemu-monitor-command --hmp <domain> '<command> [...]' So you can try virsh qemu-monitor-command --hmp DOMINO1-prealloc 'info snapshots' and thne delete it with the provided snapshot ID virsh qemu-monitor-command --hmp DOMINO1-prealloc 'delvm <ID>' This will delete the snapshot from your diskimage. Christian. On Di, 2013-01-22 at 18:00, libvirt-users-request(a)redhat.com wrote: > Message: 3 > Date: Mon, 21 Jan 2013 23:43:57 +0100 > From: jurgen.depicker(a)let.be > To: libvirt-users <libvirt-users(a)redhat.com> > Subject: [libvirt-users] snapshot troubles > Message-ID: > <OF4AE792B7.46B8D599-ONC1257AFA.0073C652-C1257AFA.007D0C38(a)let.be> > Content-Type: text/plain; charset="us-ascii" > > Dear all, > I created some snapshots, a long time ago, using the xml description > option, so the snapshots have a name with a space in it... > Really a bad choice apparently, since it seems impossible to delete > them > now: I cannot find how to enter the snapshot name properly due to the > space. Quotes don't seem to help; escaping the space doesn't help > either. > Anybody knows how to solve this? > eg: > snapshot-delete DOMINO1-prealloc --snapshotname 'W2K3-virgin install' > error: Domain snapshot not found: no snapshot with matching name > ''W2K3-virgin' > (-> notive also the extra ' added ) > > root@VLET3:~# time virsh snapshot-delete DOMINO1-prealloc > "W2K3-virgin\ > install" > error: unexpected data 'install' > > Thanks, Juergen >

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[libvirt-users] snapshot troubles
by jurgen.depicker＠let.be 23 Jan '13

23 Jan '13

Dear all, I created some snapshots, a long time ago, using the xml description option, so the snapshots have a name with a space in it... Really a bad choice apparently, since it seems impossible to delete them now: I cannot find how to enter the snapshot name properly due to the space. Quotes don't seem to help; escaping the space doesn't help either. Anybody knows how to solve this? eg: snapshot-delete DOMINO1-prealloc --snapshotname 'W2K3-virgin install' error: Domain snapshot not found: no snapshot with matching name ''W2K3-virgin' (-> notive also the extra ' added ) root@VLET3:~# time virsh snapshot-delete DOMINO1-prealloc "W2K3-virgin\ install" error: unexpected data 'install' Thanks, Juergen

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[libvirt-users] Fwd: problem with libvirt
by rakshith h p 22 Jan '13

22 Jan '13

HI, i'm rakshith from bangalore. I'm using libvirt in one of my work. I have a problem in using it.So i would request your guidance. I have a controller which uses libvirt to establish the connection to the managed nodes. After the connection is successful, if the network goes down, the control will indefinitely wait inside the libvirt mod functions. It will come out only after the network is back and required data is obtained. In this case i need to add time out and get the control back once the data is not available and throw an exception. Can u please tell if there is any way i can do it.Thanks in advance -- Thanks and regards Rakshith H P Mobile - +919844303929

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[libvirt-users] Fwd problem with libvirt
by rakshith h p 22 Jan '13

22 Jan '13

---------- Forwarded message ---------- From: "rakshith h p" <hpr3929(a)gmail.com> Date: 22 Jan 2013 22:10 Subject: problem with libvirt To: <berrange(a)redhat.com> Cc: HI, i'm rakshith from bangalore. I'm using libvirt in one of my work. I have a problem in using it.So i would request your guidance. I have a controller which uses libvirt to establish the connection to the managed nodes. After the connection is successful, if the network goes down, the control will indefinitely wait inside the libvirt mod functions. It will come out only after the network is back and required data is obtained. In this case i need to add time out and get the control back once the data is not available and throw an exception. Can u please tell if there is any way i can do it.Thanks in advance -- Thanks and regards Rakshith H P Mobile - +919844303929

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[libvirt-users] Question about blkiotune.device_weight
by hzguanqiang 21 Jan '13

21 Jan '13

Hi, Hu Tao I noticed that in your patch about blkiotune.device_weight, You set the device blkio weight value between 100 and 1000. But from the kernel document, I see that the blkio weight can be set from 10 to 1000. Why do you limit the weight minimum to 100 rather than 10 ? Looking forward your explanation, thanks! -------------- Best regards! GuanQiang 2013-01-18

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[libvirt-users] error on startup
by Bryan D. Payne 21 Jan '13

21 Jan '13

I'm running libvirt 1.0.1 and qemu 1.3. I see the following error of libvirtd startup: 2013-01-19 04:51:06.183+0000: 1459: error : virCommandWait:2287 : internal error Child process (LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin HOME=/ /usr/bin/kvm -help) unexpected exit status 1 This is indeed what the return code seems to be for that command. This this just a version issue with libvirt and qemu or ?? root@host:~# kvm -help usage: qemu-x86_64 [options] program [arguments...] Linux CPU emulator (compiled for x86_64 emulation) Options and associated environment variables: Argument Env-variable Description -h print this help -g port QEMU_GDB wait gdb connection to 'port' -L path QEMU_LD_PREFIX set the elf interpreter prefix to 'path' -s size QEMU_STACK_SIZE set the stack size to 'size' bytes -cpu model QEMU_CPU select CPU (-cpu help for list) -E var=value QEMU_SET_ENV sets targets environment variable (see below) -U var QEMU_UNSET_ENV unsets targets environment variable (see below) -0 argv0 QEMU_ARGV0 forces target process argv[0] to be 'argv0' -r uname QEMU_UNAME set qemu uname release string to 'uname' -B address QEMU_GUEST_BASE set guest_base address to 'address' -R size QEMU_RESERVED_VA reserve 'size' bytes for guest virtual address space -d options QEMU_LOG activate log -D logfile QEMU_LOG_FILENAME override default logfile location -p pagesize QEMU_PAGESIZE set the host page size to 'pagesize' -singlestep QEMU_SINGLESTEP run in singlestep mode -strace QEMU_STRACE log system calls -version QEMU_VERSION display version information and exit Defaults: QEMU_LD_PREFIX = /usr/gnemul/qemu-x86_64 QEMU_STACK_SIZE = 8388608 byte QEMU_LOG = /tmp/qemu.log You can use -E and -U options or the QEMU_SET_ENV and QEMU_UNSET_ENV environment variables to set and unset environment variables for the target process. It is possible to provide several variables by separating them by commas in getsubopt(3) style. Additionally it is possible to provide the -E and -U options multiple times. The following lines are equivalent: -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG Note that if you provide several changes to a single variable the last change will stay in effect. root@host:~# echo $? 1 Thanks, -bryan

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