- Users - libvirt List Archives

[libvirt-users] getting an error when installing LIBVIRT.
by cooldharma06 27 Sep '13

27 Sep '13

hi i am installing libvirt-0.9.12. i am getting following error: libvirtd: /usr/local/lib/libvirt.so.0: version `LIBVIRT_PRIVATE_0.9.12' not found (required by libvirtd) how to solve this one. i am installing from my repositary itself. the same package is working fine for my friend. suggest me some solutions. i googled but i have not get any related stuffs. Regards cooldharma06.

3 3

[libvirt-users] Strange results with QoS definition
by Patrick Herzfeld 27 Sep '13

27 Sep '13

Hi I'm currenty testing network QoS implementations stumbled upon quite strange results when using QoS definitions inside the virtdomain xml. I'm testing bandwidth from a virtdomain towards a hardware server connected to the same switch, both connected to gigabit ports. Iperf tells me the bandwidth is around 939 Mbit/s. I added this to my virtdomains xml: <bandwidth> <inbound average='1280'/> <outbound average='1280'/> </bandwidth> This should limit the bandwidth to around 10 megabit/s 1280 kilobytes/s, however i get only around 5.14 Mbits/sec... Has anyone an idea what causes this difference? I already checked the applied qdisc & class: root@testvirt-patrick:~ # tc qdisc sh dev vnet1 qdisc htb 1: root refcnt 2 r2q 10 default 1 direct_packets_stat 0 qdisc ingress ffff: parent ffff:fff1 ---------------- root@testvirt-patrick:~ # tc class sh dev vnet1 class htb 1:1 root prio 0 rate 10240Kbit ceil 10240Kbit burst 1598b cburst 1598b Freundliche Grüsse / kind regards Patrick Herzfeld -- Nine Internet Solutions AG, Albisriederstrasse 243a, CH-8047 Zuerich Tel +41 44 637 40 00 | Support +41 44 637 40 40 | Fax +41 44 637 40 01

2 1

[libvirt-users] virtio channel socket bind error
by Chunduru Venkata, Ravi 27 Sep '13

27 Sep '13

Hi All, My intent is to make virtio unix channel work. I could configure the XML and launch VM and could see the port in /dev/virtio-ports <channel type='unix'> <source mode='bind' path='/tmp/appl_port'/> <target type='virtio' name='appl_port'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> When I see on the host, the unix socket is already binded and is in listening state. echo "test this" > /tmp/appl_port bash: /tmp/appl_port: No such device or address netstat -nax | grep appl_port unix 2 [ ACC ] STREAM LISTENING 15302258 /tmp/appl_port 1) Can some one please have a look and help me fix this. 2) if I don't set source mode to 'bind', it gets set to 'connect' in xml and VM fails to boot up. I would like to understand the different types of source mode. Dmesg shows below denied message for connect mode. 84616.025345] type=1400 audit(1380129082.835:210): apparmor="DENIED" operation="capable" parent=1 profile="/usr/sbin/libvirtd" pid=9804 comm="libvirtd" pid=9804 comm="libvirtd" capability=29 capname="audit_write" Thanks, -Ravi.

3 4

[libvirt-users] connecting with the libvirt daemon on xen+debian
by Aamir A R 27 Sep '13

27 Sep '13

Hi all:Me being new to libvirt, this may sound very trivial to you. Any help is welcome. I have deb7u1, with xen4.1.4 and libvirt 0.9.12 (since those are the latest available thru apt utility) . I have enabled xen-unix-server as well as xen-http-server in the /etc/xen/xend-config.sxp file. But I still keep getting the following message. >From local: root@debian:~# virsh -c xen:///error: unable to connect to 'localhost:8000': Connection refusederror: failed to connect to the hypervisorroot@debian:~# >From remote: [root@CentOS-6 libvirt]# virsh -c xen+ssh://root@10.240.64.112/root@10.240.64.112's password: error: unable to connect to 'localhost:8000': Connection refusederror: failed to connect to the hypervisor[root@CentOS-6 libvirt]#

1 0

[libvirt-users] Is it possible to attach a harddisk to an ESX node
by varun bhatnagar 26 Sep '13

26 Sep '13

Hi, Is it possible to attach a harddisk to an ESX node later after creating/defining it? If yes, can anyone tell me how to do it? Regards, Varun

2 2

[libvirt-users] how to boot the lxc container with a default ip
by lei yang 26 Sep '13

26 Sep '13

Hi expert my xml is <domain type='lxc'> <name>vm1</name> <memory>500000</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <interface type='network'> <source network='default'/> </interface> <console type='pty' /> </devices> </domain> I want start the guest with a ip=192.168.122.22 how could I modify the xml ? Lei

1 0

[libvirt-users] virDomainGetInfo() returns wrong domain state
by Panday Ritesh Sharma (rpanday) 26 Sep '13

26 Sep '13

Hi Team, I have written below code to get the VM state at run time. I found, though the VM is in shut-off state, when I use the function virDomainGetInfo(); I get state as running. Could you please let me know what wrong I am doing. To know the actual VM state I used 'virsh list' and it clearly shows the VM is in shut-off state. Please find the log and code snippet below. Log from virsh: ================= [host:~]$ virsh list --all Id Name State ---------------------------------------------------- 1 calvados running 2 LCXR running 3 default-sdr--1 running - test--2 shut off Out put: ========= 04.03.06.698923264:INFO: vm_libvirt_state_to_vmm_state: state returned is 1 Note : Here 1 is actually running. Code snippet: =============== enum cidl_vmm_vm_state vm_libvirt_state_to_vmm_state(unsigned char libvirt_state) { enum cidl_vmm_vm_state state; INFO("%s: state returned is %u\n",__FUNCTION__, libvirt_state); <<<<<<<<<<<<<<<<<< if (libvirt_state == VIR_DOMAIN_RUNNING) { state = cidl_vm_state_running; } else if ((libvirt_state == VIR_DOMAIN_PAUSED) || (libvirt_state == VIR_DOMAIN_BLOCKED)) { state = cidl_vm_state_paused; } else if (libvirt_state == VIR_DOMAIN_SHUTOFF) { state = cidl_vm_state_defined; } else { state = cidl_vm_state_not_defined; } return state; } virDomainInfo res_util; virDomainPtr dom = virDomainLookupByName(virt, private_names[vm_idx]); res = virDomainGetInfo(dom, &res_util); vminfo[vm_idx].vm_state = vm_libvirt_state_to_vmm_state(res_util.state); Regards Ritesh Sharma

2 3

[libvirt-users] SR-IOV Pool Availability
by Brian Rak 26 Sep '13

26 Sep '13

If I'm using the SR-IOV Pool assignment method (from http://wiki.libvirt.org/page/Networking#Assignment_from_a_pool_of_SRIOV_VFs… ), how would I check how many virtual functions are already in use? Is there a method other then looping through all the active guests and determining if they're using the SR-IOV interface?

4 4

[libvirt-users] Migrate hangs at 99%
by Gergely Horváth 26 Sep '13

26 Sep '13

Hello guys! We have a lot of virtual machines and I recently tried out the migrate feature of libvirt. It works like a charm, even without shared storage, but when we try to migrate a VM under a little pressure (a HTTP server gets some 1-5 requests/sec) the migration process hangs at 99%. After we stop the stressing of the VM, the migration immediately finishes. I'm using the following command to migrate: virsh migrate --live --persistent --undefinesource --copy-storage-all --verbose --desturi qemu+ssh://root@DESTINATION/system VM-NAME Do you have any advice on this? Üdvözlettel / Best regards Gergely Horváth | gergely.horvath(a)inepex.com http://inepex.com | IT Development and Location Based Services http://inetrack.com | The customizable fleet tracking platform

2 2

Re: [libvirt-users] [Xen-devel] Error i am getting when using libvirt in xen 4.2
by Dario Faggioli 26 Sep '13

26 Sep '13

[This looks a lot like an user (rather than developer) question, so I'm moving the conversation to the appropriate users' lists, with xen-devel in Bcc for this message] On mer, 2013-09-25 at 10:43 +0530, cooldharma06 wrote: > hi, > > > i am using xen-4.2. i am trying to create the virual machine with > libvirt (virsh). > What distribution? What version of libvirt? Is that with the distro packaged version of libvirt and Xen, or you built them yourself? Oh, although it's probably unrelated, HVM or PV VM? > if i use the xen-xm means its working fine. > Mmm... Does that mean you have xend running? > i am getting the following error: > > > error: Failed to reconnect to the hypervisor > error: no valid connection > error: unable to connect to 'localhost:8000': Connection refused > That's what you see in the terminal output, right? What about logs? What's in /var/log/libvirt/ and /var/log/libvirt/libxl ? > Give me some idea to make the xen(xl) to work with libvirt. > Sure we can try, if you give us some more info! :-P Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

1 0

[libvirt-users] Collecting system stats
by Sam Giraffe 26 Sep '13

26 Sep '13

Hi, I am trying to create a report across all my KVM hypervisors using libvirt API and I need some assistance in figuring out the right API calls. My report will contain the total available memory, CPU, disk across all hypervisors, versus the amount used by the virtual machines. This report will help figure out if we are running low on hypervisor disk, CPU or memory and if we need to add more. I can't find the libvirt API call to get system info, such as total memory in the system, free memory, total disk space, available disk space, etc. There is virDomainInfo which shows memory total and free about a particular VM, I guess I can use active/inactive domain list and then use virDomainInfo on each of the VM's, but that does not give me hypervisor stats. I am wondering if I will have to enable SNMP and use that to get hypervisors stats. I am creating this report remotely on a reporting machine which will connect to each hypervisor using the libvirt API using one of the remote libvirt connections available. Thanks

2 2

[libvirt-users] how to mount /dev/shm on system container
by Aarti Sawant 25 Sep '13

25 Sep '13

i have create a system container test1 and trying to mount /dev/shm inside a container <domain type='lxc'> <name>test1</name> <memory>102400</memory> <os> <type>exe</type> <init>/sbin/init</init> </os> <vcpu>1</vcpu> <devices> <console type='pty'/> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/lxc/test1/'/> <target dir='/'/> </filesystem> <interface type='bridge'> <source bridge='br0'/> </interface> </devices> </domain> network settings on host /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE="eth0" BOOTPROTO="dhcp" BRIDGE="br0" HWADDR="08:00:27:97:D6:35" NM_CONTROLLED="no" ONBOOT="yes" TYPE="Ethernet" UUID="fe9d7236-f418-47ab-b472-6e6caabdd807" /etc/sysconfig/network-scripts/ifcfg-br0 DEVICE="br0" TYPE="Bridge" USERCTL="no" ONBOOT="yes" BOOTPROTO="dhcp" NM_CONTROLLED="no" network setting on host /lxc/test1/etc/sysconfig/network-scripts/ifcfg-eth0 EVICE=eth0 ONBOOT=yes TYPE=Ethernet BOOTPROTO=dhcp PREFIX=24 USERCTL=yes IPV6INIT=no vim /lxc/test1/etc/fstab none /dev/shm tmpfs defaults 0 0 chroot /lxc/test1 mkdir -m 1777 /dev/shm After mounting /dev/shm on container, my container gets hang. Has anyone tried to mount /dev/shm ? Thanks, Aarti Sawant NTTDATA OSS Center Pune

2 2

Re: [libvirt-users] virDomainGetInfo() returns wrong domain state
by Panday Ritesh Sharma (rpanday) 25 Sep '13

25 Sep '13

Hi Libvirt support team, Could you please help me with below query. Regards Ritesh Sharma From: Panday Ritesh Sharma (rpanday) Sent: Tuesday, September 24, 2013 8:22 PM To: 'libvir-list(a)redhat.com'; 'libvirt-users(a)redhat.com'; Vinay Shankarkumar (vinays) Cc: Basavaraj Bendigeri (bbendige); q-se-dev(mailer list) Subject: virDomainGetInfo() returns wrong domain state Hi Team, I have written below code to get the VM state at run time. I found, though the VM is in shut-off state, when I use the function virDomainGetInfo(); I get state as running. Could you please let me know what wrong I am doing. To know the actual VM state I used 'virsh list' and it clearly shows the VM is in shut-off state. Please find the log and code snippet below. Log from virsh: ================= [host:~]$ virsh list --all Id Name State ---------------------------------------------------- 1 calvados running 2 LCXR running 3 default-sdr--1 running - test--2 shut off Out put: ========= 04.03.06.698923264:INFO: vm_libvirt_state_to_vmm_state: state returned is 1 Note : Here 1 is actually running. Code snippet: =============== enum cidl_vmm_vm_state vm_libvirt_state_to_vmm_state(unsigned char libvirt_state) { enum cidl_vmm_vm_state state; INFO("%s: state returned is %u\n",__FUNCTION__, libvirt_state); <<<<<<<<<<<<<<<<<< if (libvirt_state == VIR_DOMAIN_RUNNING) { state = cidl_vm_state_running; } else if ((libvirt_state == VIR_DOMAIN_PAUSED) || (libvirt_state == VIR_DOMAIN_BLOCKED)) { state = cidl_vm_state_paused; } else if (libvirt_state == VIR_DOMAIN_SHUTOFF) { state = cidl_vm_state_defined; } else { state = cidl_vm_state_not_defined; } return state; } virDomainInfo res_util; virDomainPtr dom = virDomainLookupByName(virt, private_names[vm_idx]); res = virDomainGetInfo(dom, &res_util); vminfo[vm_idx].vm_state = vm_libvirt_state_to_vmm_state(res_util.state); Regards Ritesh Sharma

1 0

[libvirt-users] VM with ceph backend snapshot-revert error
by 王根意 24 Sep '13

24 Sep '13

Hey guys: I have a running vm with ceph backend: root@apc20-005:~# virsh list > Id Name State > ---------------------------------- > 56 one-240 running And *snapshot-create-as* works well: root@apc20-005:~# virsh snapshot-create-as one-240 > Domain snapshot 1380009353 created But when exec *snapshot-revert*, error occurs: root@apc20-005:~# virsh snapshot-revert one-240 1380009353 > *error: operation failed: Error -22 while loading VM state* And the vm went paused state. root@apc20-005:~# virsh list > Id Name State > ---------------------------------- > 56 one-240 paused When I use qcow2 image backend, Everything is ok! Any idea?

2 1

[libvirt-users] How to create snapshots for sheepdog with libvirt API
by Pavel Tokarev 24 Sep '13

24 Sep '13

Hello! I am trying to create snapshots for sheepdog disks using libvirt API or virsh. The disk is defined in domain as follows: <disk type='network' device='disk'> <driver name='qemu' cache='none'/> <source protocol='sheepdog' name='sheepvol1'/> <target dev='vdb' bus='virtio'/> </disk> I have tried both options "external" and "internal". If I try to create external snapshot with virsh command: snapshot-create-as vps vpssnap --disk-only --diskspec vda,snapshot=no --diskspec vdb,snapshot=external I get an error: source for disk 'vdb' is not a regular file; refusing to generate external snapshot name. If I try the same command but with "internal" mode: snapshot-create-as vps vpssnap --disk-only --diskspec vda,snapshot=no --diskspec vdb,snapshot=internal virsh creates a snapshot, but this snapshot is useless. If i try to revert to this snapshot i get an error: "qemu-img: Could not open 'sheepvol1': No such file or directory", plus if I list all VDIs with "collie vdi list" I do not see any snapshots there. So i guess virsh does not create an appropriate sheepdog snapshot at all. Can someone please tell me how to create snapshots for sheepdog disks? Thank you.

1 0

[libvirt-users] creating snapshots for sheepdog with libvirt API
by Pavel Tokarev 24 Sep '13

24 Sep '13

Hello! I am trying to create snapshots for sheepdog disks using libvirt API or virsh. The disk is defined in domain as follows: <disk type='network' device='disk'> <driver name='qemu' cache='none'/> <source protocol='sheepdog' name='sheepvol1'/> <target dev='vdb' bus='virtio'/> </disk> I have tried both options "external" and "internal". If I try to create external snapshot with virsh command: snapshot-create-as vps vpssnap --disk-only --diskspec vda,snapshot=no --diskspec vdb,snapshot=external I get an error: source for disk 'vdb' is not a regular file; refusing to generate external snapshot name. If I try the same command but with "internal" mode: snapshot-create-as vps vpssnap --disk-only --diskspec vda,snapshot=no --diskspec vdb,snapshot=internal virsh creates a snapshot, but this snapshot is useless. If i try to revert to this snapshot i get an error: "qemu-img: Could not open 'sheepvol1': No such file or directory", plus if I list all VDIs with "collie vdi list" I do not see any snapshots there. So i guess virsh does not create an appropriate sheepdog snapshot at all. Can someone please tell me how to create snapshots for sheepdog disks? Thank you.

1 0

[libvirt-users] Using a shared LVM volume group for both virtual disks and host filesystems
by Edoardo Comar 24 Sep '13

24 Sep '13

Hi I have a test environment where a single LVM volume group is used both as a storage pool for virtual machines' disks AND for the LVs used for the HOST system filesystem. I never use libvirt commands to start/stop/activate the pool. Only to create/delete volumes. The test environment works fine. How suitable would be a shared VG for a production environment ? thanks, Edoardo Comar PS - This discussion seems to imply that separate VGs give more safety against data corruption in case of bugs ... did not point to real cases of failure. http://serverfault.com/questions/200728/lvm-volume-group-shared-between-kvm… Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

1 0

[libvirt-users] problem with sheepdog backend when creating a pool
by Giovanni Bellac 24 Sep '13

24 Sep '13

Hello all, I am getting a error, when creating a sheepdog pool via libvirt. libvirt is compiled as: ./configure --prefix=/opt/libvirt --without-xen --with-yajl --with-storage-sheepdog=/opt/sheepdog Sheepdog is functional, when creating manually a vdi via "qemu-img" and than using as disk in libvirt. The error looks like this: internal error missing backend for pool type 9 The peace of log: 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollMakePollFDs:391 : Prepare n=2 w=3, f=11 e=1 d=0 2013-09-18 14:51:27.580+0000: 14524: debug : virStoragePoolCreateXML:13588 : conn=0x7f1877937800, xmlDesc= <pool type="sheepdog"> <name>mysheeppool</name> <source> <name>mysheeppool</name> <host name='localhost' port='7000'/> </source> </pool> , flags=0 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollMakePollFDs:391 : Prepare n=3 w=4, f=12 e=1 d=0 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollMakePollFDs:391 : Prepare n=4 w=5, f=6 e=1 d=0 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollMakePollFDs:391 : Prepare n=5 w=6, f=14 e=1 d=0 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollMakePollFDs:391 : Prepare n=6 w=7, f=13 e=0 d=0 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollMakePollFDs:391 : Prepare n=7 w=8, f=13 e=1 d=0 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollMakePollFDs:391 : Prepare n=8 w=10, f=16 e=1 d=0 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollMakePollFDs:391 : Prepare n=9 w=12, f=17 e=1 d=0 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollCalculateTimeout:332 : Calculate expiry of 2 timers 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollCalculateTimeout:340 : Got a timeout scheduled for 1379515892580 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollCalculateTimeout:353 : Schedule timeout then=1379515892580 now=1379515887580 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollCalculateTimeout:361 : Timeout at 1379515892580 due in 5000 ms 2013-09-18 14:51:27.580+0000: 14522: debug : virEventPollRunOnce:627 : EVENT_POLL_RUN: nhandles=9 timeout=5000 2013-09-18 14:51:27.580+0000: 14524: debug : virFileClose:90 : Closed fd 18 2013-09-18 14:51:27.580+0000: 14524: debug : virObjectRef:293 : OBJECT_REF: obj=0x7f1877925550 2013-09-18 14:51:27.580+0000: 14524: debug : virAccessManagerCheckStoragePool:321 : manager=0x7f1877925550(name=stack) driver=QEMU pool=0x7f1864001340 perm=5 2013-09-18 14:51:27.580+0000: 14524: debug : virAccessManagerCheckStoragePool:321 : manager=0x7f1877929180(name=none) driver=QEMU pool=0x7f1864001340 perm=5 2013-09-18 14:51:27.580+0000: 14524: debug : virAccessManagerCheckStoragePool:321 : manager=0x7f1877925550(name=stack) driver=QEMU pool=0x7f1864001340 perm=2 2013-09-18 14:51:27.580+0000: 14524: debug : virAccessManagerCheckStoragePool:321 : manager=0x7f1877929180(name=none) driver=QEMU pool=0x7f1864001340 perm=2 2013-09-18 14:51:27.580+0000: 14524: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7f1877925550 2013-09-18 14:51:27.580+0000: 14524: error : virStorageBackendForType:1114 : internal error missing backend for pool type 9 The pool XML: <pool type="sheepdog"> <name>mysheeppool</name> <source> <name>mysheeppool</name> <host name='localhost' port='7000'/> </source> </pool> Kind regards Giovanni

2 1

[libvirt-users] Expanding an LVM Storage Pool
by McEvoy, James 24 Sep '13

24 Sep '13

I looked around but could not find any info on how to expand a libvirt managed LVM storage pool. I do not see any virsh command to do it but I was successful using the vgexpand command to add some more storage once I destroyed the pools and then restarted it. I'd like to verify that this is the proper way to grow the storage in a libvirt LVM storage pool. And this brings up a second question, I did this without any VM running so I'd like to know what the impact of destroying a running pool is on running VMs. Does taking the pool off-line cause any issues with running VMs or is the only affect that the pool is unavailable for management by libvirt? These are the commands that I ran to create my pool and expand it after a kickstart of the server: pvcreate -ff -y /dev/mapper/mpath? virsh pool-define-as --name GuestVols --type logical --source-dev /dev/mapper/mpatha --target /dev/GuestVols virsh pool-build GuestVols virsh pool-start GuestVols virsh pool-autostart GuestVols virsh pool-destroy --pool GuestVols vgextend GuestVols /dev/mapper/mpath{b..d} vgdisplay GuestVols virsh pool-start --pool GuestVols virsh pool-info --pool GuestVols Is this the best way to create a managed pool across 4 LUNs? And to potentially expand the storage group in the future if more storage is needed? --jim

2 2

[libvirt-users] Specify mount option for Storage-Pool
by Jorge Fábregas 24 Sep '13

24 Sep '13

Hi, I've changed the "default" storage-pool from "directory-based" to a "pre-formatted block-device" since my /var/lib/libvirt/images is on a partition of its own. I would like to use the "discard" option as well as other (noatime etc) on this filesystem. Is there a way to specify mount options in the storage-pool XML definition? Thanks, Jorge p.d. the reason for the change is that I don't want the partition to be mounted all the time (just when I start libvirtd).

2 1

[libvirt-users] Libvirt ESX: Image file not getting copied to ESX server
by varun bhatnagar 23 Sep '13

23 Sep '13

Hi, I am trying to start a node using libvirt on ESX hypervisor. Before starting I am performing the following steps: 1) vol-create datastore1 /local/new_volume.xml (Creating a volume in pool) 2) define /local/esxdomain.xml (Defining a node) 3) start MyNode (Starting a node) I tried to get the status of my node and it is showing *running *but I am not able to ping my node (as it is in network). I later got the console of my node and found out that my node is not even getting started. It says "Operating System Not Found". I guess this is because my vmdk image file is not getting copied and the first command is just placing two files .vmdk and *-flat.vmdk (these are dummy files I guess). But it is not placing my original .vmdk files. How to place the original vmdk file in datastore. If I place it using scp command then libvirt pops out a message saying "Could not start domain: GenericVmConfigFault". How to resolve this error. I am pasting my xml files below. Any help is appreciated... :) *new_volume.xml:* *<volume> <name>test/MyNode.vmdk</name> <allocation>0</allocation> <capacity unit='G'>3</capacity> <target> <path>/local/vmdk/MyNode.vmdk</path> <format type='vmdk'/> </target> </volume>* *esxdomain.xml: * *<domain type='vmware'> <name>test</name> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>1</vcpu> <console>/dev/console</console> <os> <type arch='x86_64'>hvm</type> </os> <devices> <disk type='file' device='disk'> <source file='[datastore1] test/MyNode.vmdk'/> <target dev='sda' bus='scsi'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='scsi' index='0' model='lsilogic'/>  <interface type='bridge'> <mac address='00:50:56:0f:01:01'/> <source bridge='VM Network'/> </interface> <interface type='bridge'> <mac address='00:50:56:0f:01:02'/> <source bridge='dummyPortGroup1'/> </interface> <interface type='bridge'> <mac address='00:50:56:0f:01:03'/> <source bridge='dummyPortGroup2'/> </interface> </devices> </domain>* Regards, Varun

1 0

[libvirt-users] Incremental Backups
by Thomas Stein 23 Sep '13

23 Sep '13

Hello. Is someone performing incremental backups via libvirt for qemu/kvm machines? I'm still having a hard time to find a nice procedure. I mean is it possible to make a full backup of an image on monday a do the next days of the week incremental backups? Another way could be mount the image and rsync its contents. Does that makes sense? Also i read in qemu changelog: --- Support for a new block device background job. Started by drive-backup, it will backup a disk's content to a new file. Unlike drive-mirror, the new file will include the source disk's content at the time the backup job was started. Atomic backup of multiple disks is supported using the "transaction" QMP command. --- Is this supported by libvirt? thanks and best regards thomas

4 11

[libvirt-users] Trouble using virStream with callbacks
by Jonathan Lebon 20 Sep '13

20 Sep '13

I am trying to write a simple app which connects a channel obtained from virDomainOpenChannel() to stdin/stdout (based in part on the snippet at [1]). However, it seems like the data received back from the stream is delayed by one iteration. It would be hard to explain this by simply showing the output, so here's a timeline instead: 1. start the program on the host 2. write "msg from host<Enter>" 3. socat on the guest sees this right away 4. from the guest's socat, write "msg from guest<Enter>" 5. the reply does not show up on the host until AFTER you press <Enter> (which of course also sends a newline to the guest) 6. this 'one line delay' occurs throughout the conversation, receiving guest replies to things sent two <Enter>s ago Doing socat on both sides work as expected. Also, using a blocked stream and a thread for sending and another for receiving works as well. It would be nice however if I could get rid of the threads in favour of callbacks. Not sure if I'm missing something obvious. Thanks, Jonathan [1] https://www.redhat.com/archives/libvir-list/2012-December/msg01084.html --- #include <ctype.h> #include <err.h> #include <errno.h> #include <stdlib.h> #include <stdio.h> #include <string.h> #include <libvirt/libvirt.h> #include <fcntl.h> #define CONNECT_URI "qemu:///system" #define DOMAIN "TestVM" #define CHANNEL "channel.0" #define BUF_SIZE 80 int stream_active = 1; void stdin_to_stream(int watch, int fd, int events, void *opaque) { virStreamPtr stream = *((virStreamPtr*)(opaque)); if (events & VIR_EVENT_HANDLE_READABLE) { char buf[1024]; int bytes_read = read(fd, buf, sizeof(buf)); if (bytes_read > 0) virStreamSend(stream, buf, bytes_read); } if (events & (VIR_EVENT_HANDLE_ERROR|VIR_EVENT_HANDLE_HANGUP)) { stream_active = 0; } return; } void stream_to_stdout(virStreamPtr stream, int events, void *opaque) { if (events & VIR_EVENT_HANDLE_READABLE) { char buf[1024]; int bytes_read = virStreamRecv(stream, buf, sizeof(buf)); if (bytes_read > 0) { fwrite(buf, bytes_read, 1, stdout); fflush(stdout); } } if (events & (VIR_EVENT_HANDLE_ERROR|VIR_EVENT_HANDLE_HANGUP)) { stream_active = 0; } return; } int main(int argc, char *argv[]) { virConnectPtr conn; virDomainPtr dom; virStreamPtr st; int bytes_read; char buf[BUF_SIZE]; if ((conn = virConnectOpen(CONNECT_URI)) == NULL) errx(1, "virConnectOpen"); if ((dom = virDomainLookupByName(conn, DOMAIN)) == NULL) errx(1, "virDomainLookupByName"); if ((st = virStreamNew(conn, VIR_STREAM_NONBLOCK)) == NULL) errx(1, "virStreamNew"); if (virDomainOpenChannel(dom, CHANNEL, st, 0) == -1) errx(1, "virDomainOpenChannel"); if (virEventRegisterDefaultImpl() != 0) errx(1, "virEventRegisterDefaultImpl"); if (virStreamEventAddCallback(st, 1|4|8, stream_to_stdout, NULL, NULL) != 0) errx(1, "virStreamEventAddCallback"); int flags = fcntl(fileno(stdin), F_GETFL) | O_NONBLOCK; fcntl(fileno(stdin), F_SETFL, flags); if (virEventAddHandle(fileno(stdin), 1|4|8, stdin_to_stream, &st, NULL) < 0) errx(1, "virEventAddHandle"); while (stream_active) { if (virEventRunDefaultImpl() != 0) { errx(1, "virEventRunDefaultImpl"); break; } } if (virStreamFinish(st) < 0) errx(1, "virStreamFinish"); if (virStreamFree(st) < 0) errx(1, "virStreamFree"); return 0; }

2 6

[libvirt-users] Libvirt not able to attach console to VM on ESX hypervisor
by varun bhatnagar 19 Sep '13

19 Sep '13

Hi, I have started a virtual machine on my ESXi server. I was trying to attach a console to it but when I executed the command I got a message saying that *"Attaching a console is not supported in the current hypervisor." *Is there any way (patch or something) through which I can attach a console to my VM. The ESX version is 5.1 and I am using latest version of libvirt. Regards, Varun

1 0

[libvirt-users] Specifying a USB Device to use USB2 Controller
by Cameron Curle 18 Sep '13

18 Sep '13

Hi all, Can anyone please advise the correct process for defining a USB device to point to a USB 2 Controller? Specifically, how do you define a USB device to use the EHCI controller in a guest xml file? To summarize my problem: I have 1 x USB1 device and 1 x USB2 device that I would like to use from within a Windows XP Guest. If I add the USB2 device (Avid M-box) to the guest machine via Virt-Manager it will not detect in the guest, when I check the libvirt logs for the VM it shows a "Device speed mismatch" error. Which leads me to think that its attaching itself to the default UHCI controller, as the USB1 device functions correctly. I've followed a similar post on the list here which seems to detail what I am trying to achieve: https://www.redhat.com/archives/libvirt-users/2012-June/msg00139.html I have tried using the controller type and model as below, however, when I try and define the "port" option, it disappears from the configuration file and won't attach to the EHCI controller. <controller type='usb' index='0' model='ich9-ehci' / I've done some searching but can't find any information on how to specifically assign a USB device to a certain controller. Any information or guides you could provide would be much appreciated. I'm using RHEL 6.4 with latest updates available. qemu-kvm-0.12.1.2-2.355.el6.4.7 libvirt-0.10.2-18.el6 4.9 I'm currently defining the USB2 device like this: <hostdev mode='subsystem' type='usb' managed='yes' <source> <vendor id='0x0763' /> <product id='0x202a' /> <address bus='1' device='3' /> </source> </hostdev> Thank you in advance for your assistance. Kind Regards, Cameron

1 1