August 2011 - Users - libvirt List Archives

[libvirt-users] Detaching LVM volume from Windows guest
by mkey 20 Aug '11

20 Aug '11

Hello, I have some difficulties regarding to above title. Windows as guest OS is running on KVM(Ubuntu natty). After attaching LVM volume to guest OS and did "safely remove device" in guest windows, detaching volume was failed. > root@localhost:/opt/win# virsh detach-disk testwin vdc > error: Failed to detach disk > errpr: operation failed: detaching virtio-disk2 device failed: Device 'virtio-disk2' not found But kvm(qemu?) seems like detaching device successfully. > root@localhost:/opt/win# virsh qemu-monitor-command testwin 'info block' > drive-virtio-disk0: type=hd removable=0 file=/opt/win/win2008server.virtio.img ro=0 drv=qcow2 encrypted=0 So, problem is, libvirt doesn't know detaching, but kvm(qemu) knows. Again, please let me know if anybody has workaround. P.S. at some website, I found "hotunplugging is not supported in current libvirt", is that related on this matter? Regards, mkey

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[libvirt-users] build libvirt from source yourself and make sure to get the XenAPI driver enabled.
by Lovocas Mou 19 Aug '11

19 Aug '11

Hi, I want install libvirt on my ubuntu11.04, and I want to test using libvirt to manage a xenserver, after download the tar and extract them when in this step : ./configure --with-esx --with-xenapi --prefix=/opt/libvirt .... checking for xen_vm_start in -lxenserver... no configure: error: You must install the XenServer Library to compile XenAPI driver with -lxenserver ..... I get this error, but i get very few information about it from google. >>libvirt can use XenAPI via libxenserver [1]. That should allow you to >> use libvirt with a Citrix XenServer. You can use virsh like this >> assuming you have a libxenserver enabled libvirt: >> >> virsh -c xenapi://my-xen-server >> >> But it's true, there is no documentation about this on the libvirt website >> yet. >> >> [1] http://community.citrix.com/display/xs/Download+SDKs I download the libxenserver source and binary file from the above url, but I don't know how to install it and how to use -lxenserver, can anyone help me? thanks!

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[libvirt-users] Detecting the last user of a connection has closed.
by Andy Joslin 18 Aug '11

18 Aug '11

The documentation says something that concerns me: http://libvirt.org/html/libvirt-libvirt.html#virConnectClose "It is possible for the last virConnectClose<http://libvirt.org/html/libvirt-libvirt.html#virConnectClose>to return a positive value if some other object still has a temporary reference to the connection, but the application should not try to further use a connection after the virConnectClose<http://libvirt.org/html/libvirt-libvirt.html#virConnectClose>that matches the initial open." The application I am working on requires that I know when the last thread using this connection goes away, so I can properly cleanup some overhead. If I can't trust the return value of this call, how will I know that the connection is indeed torn down? Under what circumstances will the virConnectClose behave this way? Thanks, BTW, I am using 0.8.2

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[libvirt-users] which vols added to storage pool during refresh?
by Gareth S Bestor 17 Aug '11

17 Aug '11

(opps, actually meant to post this to libvirt-users instead of libvirt-cim...) We're looking at a problem when we have a libvirt pool defined, below [root@xnl2192 ~]# virsh pool-dumpxml ScsiPool-host2 <pool type='scsi'> <name>ScsiPool-host2</name> <uuid>f2ea1882-881f-9f49-838d-39e070f68002</uuid> <capacity>136583315456</capacity> <allocation>136583315456</allocation> <available>0</available> <source> <adapter name='host2'/> </source> <target> <path>/dev/disk/by-id</path> <permissions> <mode>0700</mode> <owner>-1</owner> <group>-1</group> </permissions> </target> </pool> As you can see, this pool maps to /dev/disk/by-id. There may be a large number of actual volume entries in /dev/disk/by-id, however it appears only a distinct subset of them are actually added into the libvirt pool when you do a pool-refresh. What does libvirt check when determining which, and whether or not, to add one of these volume into the vol-list? In particular, we have a case when one specific volume in /dev/disk/by-id is *not* added into the pool, and no amount of pool-refresh makes a difference. We did notice that if you remove all the sym links in /dev/disk/by-id and do a pool-refresh, that libvirt re-scans the bus, recreates the links in /dev/disk/by-id, and adds (some of) the volumes back into the vol-list. But not this one problematic vol, so clearly there is something about this vol that libvirt doesnt like and why it is (deliberately?) not added to the pool. What checks, etc does libvirt make against vols when determining whether to add them to a pool? - G Dr. Gareth S. Bestor IBM Senior Software Engineer Systems & Technology Group - Systems Management Standards 971-285-6375 (mobile) bestor(a)us.ibm.com_______________________________________________ Libvirt-cim mailing list Libvirt-cim(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-cim

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Re: [libvirt-users] Migration hangs on Gentoo with KVM
by Eric Blake 17 Aug '11

17 Aug '11

[re-adding the list] On 08/01/2011 04:22 PM, Jonathan Stoppani wrote: > > On Aug 1, 2011, at 16:20 , Eric Blake wrote: > >> On 08/01/2011 04:11 PM, Jonathan Stoppani wrote: >>> Hi there, >>> >>> I'm trying to migrate a domain between two Gentoo hosts using KVM as hypervisor, but the migration hangs. >>> I tried both live or offline migration modes without success. >> >> Does your 'nc' command have a -q option? If so, then this is probably >> >> https://bugzilla.redhat.com/show_bug.cgi?id=726174 >> > > Thanks for the prompt answer Eric! Yes, nc has a q option: > > -q, --hold-timeout=SEC1[:SEC2] Set hold timeout(s) for local [and remote] Glad to hear that we found root cause to your problems, then. > > The bug specifically refers to ssh, does that mean that it should work over tcp? The problem is that libvirt is trying to start a remote nc session over ssh; but looking at http://libvirt.org/remote.html, it looks like ssh is the only protocol using nc in that manner (so yes, you can probably avoid the issue by using tcp or tls). Meanwhile, I think you can work around it without patching libvirt, by using this as your remote URI: qemu+ssh://user@remotehost/system?netcat=/path/to/nc-wrapper where nc-wrapper is an executable script installed on remotehost, looking like: #!/bin/sh exec /path/to/real/nc -q0 "$@" -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org

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[libvirt-users] segfault while unloading libvirt provider.
by Sharad Mishra 17 Aug '11

17 Aug '11

I have a CIM provider that just calls virConnectOpen("qemu:///system"); and virConnectClose(). When cimom unloads this provider segfaults - #0 0x000000305b420cd0 in ?? () (gdb) bt #0 0x000000305b420cd0 in ?? () #1 0x00000031a3e05ad9 in __nptl_deallocate_tsd () from /lib64/libpthread.so.0 #2 0x00000031a3e0674b in start_thread () from /lib64/libpthread.so.0 #3 0x00000031a32d3d1d in clone () from /lib64/libc.so.6 If I remove virConnectOpen and virConnectClose, the provider unloads without any problem. I am using RHEL 5.5 with libvirt-0.6.3-33.el5 and kvm-83-164.el5. Any ideas on this core? Regards, Sharad Mishra Open Virtualization Linux Technology Center IBM

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[libvirt-users] A few more questions ....
by William A. Mahaffey III 17 Aug '11

17 Aug '11

.... I have a 64-bit CentOS 5.6 VM running on a 64-bit FC14 host, libvirt 0.8.3-10.fc14, 64-bit. I am getting messages in my syslog file, 2 about every 20 min. about dnsmasq: Aug 17 04:53:52 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 04:53:52 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 05:20:13 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 05:20:13 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 05:40:57 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 05:40:57 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 06:08:53 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 06:08:53 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 06:32:44 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 06:32:44 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 06:58:59 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 06:58:59 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 07:19:23 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 07:19:23 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 07:40:27 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 07:40:27 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 08:01:33 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 08:01:33 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 08:24:20 Q6600 rpc.mountd[1689]: authenticated mount request from 192.168.122.213:1010 for /home (/home) Aug 17 08:27:23 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 08:27:23 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 08:27:49 Q6600 kernel: [253719.519366] CIFS VFS: No username specified Aug 17 08:27:49 Q6600 kernel: [253719.519394] CIFS VFS: cifs_mount failed w/return code = -22 Aug 17 08:27:49 Q6600 kernel: [253719.527482] CIFS VFS: No username specified Aug 17 08:27:49 Q6600 kernel: [253719.527507] CIFS VFS: cifs_mount failed w/return code = -22 Aug 17 08:31:23 Q6600 kernel: [253932.627920] CIFS VFS: No username specified Aug 17 08:31:23 Q6600 kernel: [253932.627949] CIFS VFS: cifs_mount failed w/return code = -22 Aug 17 08:31:23 Q6600 kernel: [253932.637894] CIFS VFS: No username specified Aug 17 08:31:23 Q6600 kernel: [253932.637925] CIFS VFS: cifs_mount failed w/return code = -22 Aug 17 08:32:51 Q6600 rpc.mountd[1689]: authenticated mount request from 192.168.0.15:939 for /home (/home) Aug 17 08:38:38 Q6600 rpc.mountd[1689]: authenticated unmount request from 192.168.0.15:619 for /home (/home) Aug 17 08:38:43 Q6600 rpc.mountd[1689]: authenticated mount request from 192.168.0.15:644 for /home (/home) Aug 17 08:44:53 Q6600 rpc.mountd[1689]: authenticated unmount request from 192.168.0.15:699 for /home (/home) Aug 17 08:52:08 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 08:52:08 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 08:59:13 Q6600 rpc.mountd[1689]: authenticated unmount request from 192.168.122.213:671 for /home (/home) Aug 17 09:16:46 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 09:16:46 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 09:43:00 Q6600 dnsmasq-dhcp[1969]: DHCPREQUEST(virbr0) 192.168.122.213 52:54:00:a4:98:a3 Aug 17 09:43:00 Q6600 dnsmasq-dhcp[1969]: DHCPACK(virbr0) 192.168.122.213 52:54:00:a4:98:a3 They are washing other stuff out of easy view .... Is there a way to silence these messages ? Also, my ifconfig shows: [root@Q6600:/etc, Wed Aug 17, 09:51 AM] 1250 # ifconfig eth0 Link encap:Ethernet HWaddr 00:E0:81:C4:F1:A8 inet addr:192.168.0.9 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::2e0:81ff:fec4:f1a8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:27188084 errors:0 dropped:0 overruns:0 frame:0 TX packets:24641412 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:26215788177 (24.4 GiB) TX bytes:20506959836 (19.0 GiB) Interrupt:16 Memory:d0100000-d0120000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:135350 errors:0 dropped:0 overruns:0 frame:0 TX packets:135350 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:99406539 (94.8 MiB) TX bytes:99406539 (94.8 MiB) virbr0 Link encap:Ethernet HWaddr FE:54:00:A4:98:A3 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1849 errors:0 dropped:0 overruns:0 frame:0 TX packets:3276 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:259897 (253.8 KiB) TX bytes:559502 (546.3 KiB) vnet0 Link encap:Ethernet HWaddr FE:54:00:A4:98:A3 inet6 addr: fe80::fc54:ff:fea4:98a3/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2335 errors:0 dropped:0 overruns:0 frame:0 TX packets:33985 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:308069 (300.8 KiB) TX bytes:1933956 (1.8 MiB) [root@Q6600:/etc, Wed Aug 17, 09:57 AM] 1251 # Is there a way to get vnet0 to use IPV4 ? Where is that configured ? I presume that it (vnet0) is the server/host end of the virbr0 bridge, what type of interface is it ? The online docs are good & voluminous, but I haven't (yet) found any info on this question. In fact, the pages I have seen where brctl commands are shown show nothing for the interface of virbr0 (empty space, no output), where mine shows: [root@Q6600:/etc, Wed Aug 17, 10:19 AM] 1256 # brctl show bridge name bridge id STP enabled interfaces virbr0 8000.fe5400a498a3 yes vnet0 [root@Q6600:/etc, Wed Aug 17, 10:19 AM] 1257 # hence my questions about vnet0 :-) .... TIA for any clues .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.

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[libvirt-users] virt-install -> guest stops at installation end
by Julien Garet 17 Aug '11

17 Aug '11

Hello, I am using virt-install to install CentOS6 guests on a CentOS6 KVM remote host. Everything works fine except that at the end of the installation, the guest stops instead of rebooting, which I thought, should be the default behaviour. The command I use is : [root@myorchestrator]# /usr/local/bin/virt-install --connect qemu+ssh://root@mydom0/system --name myclient --accelerate --ram 2048 --disk path=/mnt/client.img,size=10 --os-type=linux --network bridge:mybridge --vnc --pxe -m 52:54:00:00:3d:a9 virt-install version is 0.500.6 on the host where I use virt-install. libvirt is version 0.8.1 (CentOS 6) on dom0. Any advice ? Julien Garet

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[libvirt-users] Question about terminology
by Jeff 16 Aug '11

16 Aug '11

I'm having a minor disagreement with a colleague over terminology. When you have a group of KVM Hosts which have access to the same network and storage (for purposes of migration) yet there is no clusterware or HA software involved...how does one refer to this group of hosts? I call them a "Host Group." He insists on the term "Cluster." To me, "cluster" indicates the presence of an HA solution such as RHCS or VCS and using the term when neither exist would generate confusion. He insists that since VMWare refers to the same configuration as a "cluster" that this is how we should refer to it with regard to KVM. Wouldn't be that big of a deal, except that I'm trying to develop operational documentation. Anyone else out there have suggestions? Jeff

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[libvirt-users] does kvm support SATA driver?
by lisiyang 16 Aug '11

16 Aug '11

Hi, I encounter a problem. My virtual machine is windows 7 . I install it using bus ide. There is not any problem until now. but when I want to attach a disk to it(bus=scsi ) , the os can’t find the suitable SCSI driver. I search the problem on the internet ,it seems that the windows7 don’t support SCSI driver. So ,I want attach the disk to vm using SATA. So I want to know that whether the kvm support SATA driver and whether the kvm support USB 2.0? Hope for reply. Thank in advance. Thanks & Best Regards, ---------------------------------------------------- Li, Si Yang(李思扬) Beijing University of Posts and Telecommunications , Beijing Internet e-mail:lisiyang_best@sina.com Address: Road 10 Xitucheng, Haidian District, Beijing 100876 ----------------------------------------------------

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[libvirt-users] The saga continues ....
by William A. Mahaffey III 15 Aug '11

15 Aug '11

.... I have a 64-bit CentOS 5.6 VM running on a 64-bit FC14 host. Actually, I *HAD* a 64-bit CentOS 5.6 VM :-) .... After a read of the virt-install man page, I concluded that I could lose the current VM (but *NOT* its HDD image) & recreate it fairly easily w/ the right combo of arguments to virt-install. The proceedings: [root@Q6600:/etc, Mon Aug 15, 04:30 PM] 1163 # virsh list Id Name State ---------------------------------- 1 CentOS-5.6-64bitVM running [root@Q6600:/etc, Mon Aug 15, 04:30 PM] 1164 # virsh destroy CentOS-5.6-64bitVM Domain CentOS-5.6-64bitVM destroyed [root@Q6600:/etc, Mon Aug 15, 04:30 PM] 1165 # virsh list Id Name State ---------------------------------- [root@Q6600:/etc, Mon Aug 15, 04:30 PM] 1166 # virsh undefine CentOS-5.6-64bitVM Domain CentOS-5.6-64bitVM has been undefined [root@Q6600:/etc, Mon Aug 15, 04:30 PM] 1167 # virsh list Id Name State ---------------------------------- [root@Q6600:/etc, Mon Aug 15, 04:31 PM] 1169 # virt-install -n CentOS-5.6-64bitVM -r 2048 --arch=x86_64 --cpu core2duo,disable=vmx --vcpus=2,maxvcpus=2,sockets=1,cores=2,threads=1 --os-type=linux --os-variant=rhel5 --import --disk path=/home/VMs/CentOS.5.6-64bit-VM/disk.img,format=raw --autostart --prompt This will overwrite the existing path '/home/VMs/CentOS.5.6-64bit-VM/disk.img' Do you really want to use this disk (yes or no) no What would you like to use as the disk (file path)? quit How large would you like the disk (quit) to be (in gigabytes)? ^CInstallation aborted at user request [root@Q6600:/etc, Mon Aug 15, 04:31 PM] 1170 # i.e. I chickened out at the ominous-sounding message about wiping out my hard-won disk image .... I thought (from the man-page) that the '--import' command would skip any attempts at installing anything, define the VM from the arguments supplied, & boot it from the already-prepped disk image .... Am I right here ? If not, is there a recommended way to re-create my VM (mostly) from the extant disk image w/o having to redo whatever initialization I have done so far (setup a user, install compilers & dev.env., install Intel compiler, etc.) ? Also, is there a recommended way for the host to copy that disk image somewhere so I can try to reuse it if my future attempts at re-creation don't pan out ? TIA .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.

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[libvirt-users] Non-persistent disk
by Xianqing Yu 15 Aug '11

15 Aug '11

Hi Libvirt team, I am trying to create a new domain from XML file by using libvirt. I want this new domain using non-persistent disk as its disk. Non-persistent disk means that when the domain is running, all the modification would not be written to disk file. So next time, when you boot VM from the same disk file, you would have a fresh disk. I check the website but I could not find anything about this. I wonder if libvirt support this function. FYI, if I use KVM, I can use command "qemu-kvm -snapshot" to boot a VM on non-persistent disk. If I use VMware, I can set disk type to Independ-disk, non-persistent. Thanks, Xianqing Yu ------ Graduate Research Assistant, Cyber Defense Lab Department of Computer Science North Carolina State University, Raleigh, NC E-mail: xyu6(a)ncsu.edu

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[libvirt-users] How to send a break using "virsh console"??
by David Knierim 15 Aug '11

15 Aug '11

I have a KVM guest running on CentOS 5.6 that is in a bad state. I would like to dump the kernel information using magic-sysrq commands, but I cannot figure out how to send a break on the virtual serial port provided by "virsh console". The guest is a standard install that will respond if I can send a break on the virtual serial port. Is it possible to send a break on the virtual serial port? Thanks, David

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[libvirt-users] Ongoing VM saga ....
by William A. Mahaffey III 15 Aug '11

15 Aug '11

.... I have a 64-bit CentOS 5.6 VM running on a 64-bit FC-14 host. I was originally using the stock NAT networking on the guest, which could access the host, but nothing else on the network. I eventually found some links on how to setup routed networking on the guest using a specifically setup bridge. I followed the example a bit too closely, bridging my eth0 interface, which is the one I nornally use to access the host over my LAN. So eth0 temporarily ceased functioning & I had to undo my handiwork through the console on the host, which I virtually never use. I restarted networking manually a couple of time on the host, but eth0 was still fried. I then rebooted the host (still through the console) & that went AOK, took about 5 min. & all was well, eth0/SSH LAN access was back & I logged back in & tried to log into the VM to plot my next course of action & .... The VM address had moved. I had set it up to use static addressing (modified the ifcfg-eth0 on the VM & restarted networking, 2 or 3 times yesterday, installed compilers, etc. from the host, & all was well until I messed around w/ trying the roll-your-own bridge this A.M.). Which brings me to the real question: How do I figure out the IP address the VM is using so I can login & continue the festivities ? I found it yesterday through the VM (virt-viewer) console after setting up the VM the 1st time, but that doesn't work today either (black screen inside the viewer, no response to regular or ctrl-keys, etc.) :-/ .... 'virsh .... console' hangs virsh, etc. :-) .... Soooooo .... how do I recover that $&#&^$&#* IP address for the VM :-) ? TIA .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.

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[libvirt-users] How to setup routed networking in CLI ....
by William A. Mahaffey III 14 Aug '11

14 Aug '11

.... I have a 64-bit CentOS 5.6 VM running on a 64-bit FC14 host. I have the stock networking (NAT), but I need routed to be able to access other boxen on my LAN. I looked at the docs on the libvirtd website, but their example of how to setup routed networking is for the GUI, which doesn't work for me (text in buttons, etc. doesn't display, no gfx card on host). The man pages are pretty good, but lack pointers on the myriad options & their interaction for networking & are a bit short on examples. Any hints on doing that (setup routed networking under CLI) for me ? URL's, etc. ? TIA .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.

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[libvirt-users] VNC ports
by Jeff 13 Aug '11

13 Aug '11

I am needing to explicitly assign VNC ports to my virtual guests so that I can connect to them externally via a VNC client, and not virt-viewer. Since I will have multiple KVM Hosts with access to the same shared storage (to facilitate migrations) I need to ensure I have unique VNC ports assigned to each guest so that I don't overlap somehow. I had planned to use a range of ports starting at 51000 for this purpose. While it works to assign port 51001, for example, to a guest and connect via my VNC client, when I run 'virsh vncdisplay guestname' it gives me back a different number that is specified in the XML file: #virsh vncdisplay win2k8guest :45101 #virsh dumpxml win2k8guest |grep vnc <graphics type='vnc' port='51001' autoport='no' /> Is there a logical reason for this that I'm not getting? I know when I have the port set to 5907, for example, it returns something expected: #virsh vncdisplay win2k8guest :7 But since I am likely going to need a good number of ports, I want to use a non-registered port range. Any insights?

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[libvirt-users] How do I disable auto-logout ....
by William A. Mahaffey III 13 Aug '11

13 Aug '11

.... I have a 64-bit CentOS 5.6 VM running on a 64-bit FC14 host. I notice that it has an automatic logout feature after a period of idleness, see below: [wam@centos-5, CFD, 5:52:45pm] 1183 % ll -tr LIST LIST.Update /usr/local/bin/P* /usr/local/bin/*WAM* ; ps -u wam -lf ; uname -a ; date ls: No match. F S UID PID PPID C PRI NI P SZ:RSS WCHAN STIME TTY TIME CMD 5 S wam 2270 2266 0 15 0 * 22540:1788 ? 15:48 ? 00:00:04 sshd: wam@pts/0 0 S wam 2271 2270 0 15 0 * 3144:2720 rt_sig 15:48 pts/0 00:00:00 -tcsh 0 R wam 18249 2271 0 15 0 0 2621:896 - 17:52 pts/0 00:00:00 ps -u wam -lf Linux centos-5.6-vm 2.6.18-238.el5 #1 SMP Thu Jan 13 15:51:15 EST 2011 x86_64 x86_64 x86_64 GNU/Linux Fri Aug 12 17:52:50 CDT 2011 [wam@centos-5, CFD, 5:52:50pm] 1184 % auto-logout Connection to 192.168.122.213 closed. [wam@Q6600, ~, 6:52:51pm] 1014 % [wam@Q6600, ~, 9:40:49pm] 1014 % [wam@Q6600, ~, 9:40:49pm] 1014 % ssh2 -l wam 192.168.122.213 Last login: Fri Aug 12 15:48:11 2011 from 192.168.122.1 [wam@centos-5, ~, 9:40:54pm] 1135 % I checked man pages on both host & VM, but came up blank. I have another box running CentOS 5.6 native & it doesn't do this, so I suspect it is something w/ the VM environment. How do I disable that :-) ? Thanks in advance. -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.

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[libvirt-users] Problems setting up a VM ....
by William A. Mahaffey III 12 Aug '11

12 Aug '11

.... New to this list & definitely new to virtualization :-/ .... I am trying to setup a 64-bit CentOS 5.6 VM on a 64-bit FC14 server host, all patched up as of a couple of weeks ago. uname -a on the host shows: [wam@Q6600, CFD, 9:24:23am] 540 % uname -a Linux Q6600 2.6.35.11-83.fc14.x86_64 #1 SMP Mon Feb 7 07:06:44 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux [wam@Q6600, CFD, 9:52:43am] 541 % I access the server by ssh on my LAN. I was working on this last Sunday & got stuck, see below. I posted this question to a couple of other lists & had no takers, so here I am here. The server runs in runlevel 3 & has no gfx card onboard, so I am working from the command line. I had a couple of abortive attempts at setup, which got as far as initializing my disk storage for the VM, then the following: [root@Q6600:/etc, Sun Aug 07, 05:08 PM] 1339 # virt-install -n CentOS-5.6-64bitVM -r 2048 --arch=x86_64 --cpu core2duo,disable=vmx --vcpus=1,maxvcpus=1,sockets=1,cores=2,threads=1 --os-type=linux --os-variant=rhel5 --disk path=/home/VMs/CentOS.5.6-64bit-VM/disk.img,size=50 --cdrom /home/ISOs/CentOS-5.6/64bit/CentOS-5.6-x86_64-bin-DVD-1of2.iso --autostart --prompt This will overwrite the existing path '/home/VMs/CentOS.5.6-64bit-VM/disk.img' Do you really want to use this disk (yes or no) yes Starting install... Creating domain... | 0 B 00:00 Gtk-Message: Failed to load module "pk-gtk-module": libpk-gtk-module.so: cannot open shared object file: No such file or directory Gtk-Message: Failed to load module "canberra-gtk-module": libcanberra-gtk-module.so: cannot open shared object file: No such file or directory (virt-viewer:20165): Pango-WARNING **: failed to choose a font, expect ugly output. engine-type='PangoRenderFc', script='latin' Domain installation still in progress. You can reconnect to the console to complete the installation process. [root@Q6600:/etc, Sun Aug 07, 05:14 PM] 1339 # virsh --connect qemu:///system Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # list Id Name State ---------------------------------- 11 CentOS-5.6-64bitVM running virsh # help The install began OK, right after the 'Pango-WARNING' message, in a separate window, quite readable, started booting & scrolling text past *FAST*, for about 15 sec., then hung, right after a line about 'serial port ....' (I couldn't click-&-drag to capture text from the VM window, going from memory). I let it sit for about 5 min. to be sure it was really hung, then clicked the VM window out, whereupon the message about 'installation still in progress' & the rest appeared. I poked around in virsh a bit as you can see, but couldn't figure anything out. I tried (re)connecting to the console of the VM & that hung, I had to kill the virsh command from another window. I attach syslog output from the proceedings. I am *sure* this is pilot error, but I am stuck for now. Any assistance appreciated :-) .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.

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[libvirt-users] virStoragePoolRefresh() returns before or after all new vols on path discovered?
by Gareth S Bestor 12 Aug '11

12 Aug '11

Basically, does virStoragePoolRefresh() api 'block' until the pool has refreshed itself (eg added any/all new volumes found in the pool path) or can it return early before the refresh is fully 'done' ? - G Dr. Gareth S. Bestor IBM Senior Software Engineer Systems & Technology Group - Systems Management Standards 971-285-6375 (mobile) bestor(a)us.ibm.com

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[libvirt-users] virInitialize dumps core intermittently.
by Sharad Mishra 12 Aug '11

12 Aug '11

Hi, I have a host with 6 VMs set to autostart. When this host reboots, it starts libvirtd, pegasus cimom and libvirt-cim. It also restarts the VMs. Intermittently we noticed a core during start up that points to the last call made by libvirt-cim to "virInitialize". I am thinking that it is a timing issue where virInitialize is called while libvirt is trying to autostart the VMs. Is this a known issue? Thanks, Sharad Mishra

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[libvirt-users] iscsi w/ libvirt
by Stefan G. Weichinger 11 Aug '11

11 Aug '11

"Playing" with a NAS capable of iscsi ... trying to make use of it within the virtual machine manager. Could someone point me at or provide me an example/screenshot of adding iscsi to my KVM-host? I think I still don't get it. Should I add an iscsi-LUN as a storage-pool? Or as single disk to a VM? Could someone pls point me at some docs to make me understand? Thanks a lot, Stefan

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[libvirt-users] the naming convention libvirt names a block based storage volume
by Yih-Herng Chuang 10 Aug '11

10 Aug '11

Seems like different libvirt versions generate a storage volume name in different format. We would like to learn how libvirt names a storage volume under a block based storage pool. So that we may properly extract the LUN identifier out of the volume name for now and in the future. On host A loaded with libvirt 0.8.7 # virsh vol-list SanPool1 Name Path ----------------------------------------- unit:0:0:11 /dev/disk/by-id/wwn-0x600a0b800013071a000035ec4e32b832 On host B loaded with libvirt 0.8.1 # virsh vol-list SanPool1 Name Path ----------------------------------------- 1.0.0.0 /dev/disk/by-id/wwn-0x60080e500017e1d40000d0b74d873b13 Regards, --Yih Yih-Herng Chuang IBM Center for Microsoft Technologies 3600 Carillon Point, Kirkland WA 98033 (DID) (425) 803-7285 (TIE) 977-7285 YihHerng(a)us.ibm.com

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[libvirt-users] virt-manager - how to add /dev/mapper as a storage pool
by Marc Haber 09 Aug '11

09 Aug '11

Hi, I would like to be able to configure VMs running off dm-crypt devices that were unlocked in the host. Unlocked dm-crypt devices show up in /dev/mapper/devicename, with devicename being the second parameter given to cryptsetup luksOpen. The LVM storage pool type insists on searching in /dev/vgname and cannot be tricked into reading /dev/mapper by giving it a fake VG named mapper; the LVM storage pool type "dir" mishandles /dev/mapper/control ("illegal seek"). Is there a workaround to be able to use such devices in virt-manager without having to define a single storage pool for every device used? Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190

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[libvirt-users] XML file location
by Jeff 08 Aug '11

08 Aug '11

Can anyone tell me how to change the default directory which stores the guest XML files? I want to keep them with the guest image files on a shared NFS filesystem. Thanks, Jeff

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[libvirt-users] Create volume wit libvirt API for Python
by Anatoliy Guskov 06 Aug '11

06 Aug '11

Please help! How create volume with libvirt API for python? conn = libvirt.open(qemu:///system) vol = libvirt.virStoragePool(conn) conf_file = 'disk.xml' f = open(conf_file) xml = f.read() pool = "default" vol.createXML(pool,xml) xml file disk.xml: <volume> <name>name.img</name> <key>/var/lib/libvirt/images/name.img</key> <source> </source> <capacity>21474836480</capacity> <allocation>21474840576</allocation> <target> <path>/var/lib/libvirt/images/name.img</path> <format type='raw'/> </target> </volume> This script not work :-( Thanks for help!

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