- Users - libvirt List Archives

[libvirt-users] libvirt client certificate location
by Vadym Chepkov 30 Apr '10

30 Apr '10

Hi, I was really surprised to find that location of client certificate, key and CA is hardcoded into libvirt. What if I need to manage servers with certificates issued by different CA? Or why do everybody has to use the same private key? Doesn't make it much of a private. It seems so strange I wonder if I am mistaken and it is possible to provide alternative location for the CA, key and certificate? Thank you, Vadym Chepkov

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Re: [libvirt-users] Windows Client
by Matthias Bolte 29 Apr '10

29 Apr '10

2010/4/28 Tim McLeod <tim.mcleod(a)simulamen.eu>: > Having newly compiled a Libvirt on a Windows Vista machine (many thanks to > Matthias Bolte) Nine :) > I have attempted to connect to a remote Ubuntu machine using > virsh.exe. However, the connection fails as follows: > > > > $ virsh -c qemu+tcp:///system You need to specify the server in this URI using a hostname or IP address: qemu+tcp://ubuntu-server.com/system > error: unable to connect to libvirtd at 'localhost': errno=10061 > > error: failed to connect to the hypervisor > > > > 1. I have modified /etc/libvirt/libvirt.conf to set listen_tcp=1. You also need to change this #auth_tcp = "sasl" to auth_tcp = "none" to disable SASL authentication/encryption for TCP connections, because your libvirt on Windows is compiled without SASL support. If you need the libvirt connections to be encrypted you can switch from TCP to TLS connections using: qemu+tls://ubuntu-server.com/system > 2. I cannot find /etc/sysconfig/libvirtd so I am unable to set > LIBVIRTD_ARGS="--listen". > For Ubuntu packaged libvirt see /etc/default/libvirt-bin and change libvirtd_opts="-d" to libvirtd_opts="-d -l" as the comment suggest and restart libvirtd using /etc/init.d/libvirt-bin restart Now you should be able to connect to the libvirtd on your Ubuntu server. Matthias

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[libvirt-users] Cloning very slow?
by Tom Hughes 29 Apr '10

29 Apr '10

Yesterday I cloned one of my VMs and, somewhat implausibly, it took virt-clone something like 8-9 hours to clone the 8Gb disk image... Copying it from the command line took a mere 6.5 minutes. I assume this is a bug, and it's not expected to take this long ;-) This was using virt-clone from python-virtinst-0.500.2-1.fc12.noarch in the virt-preview repository. Tom -- Tom Hughes (tom(a)compton.nu) http://compton.nu/

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[libvirt-users] ruby-libvirt equiv of virsh list --all
by Mick Pollard 29 Apr '10

29 Apr '10

Hi all, I have a working KVM system managed with virsh and virt-install. I am currently playing with ruby-libvirt-0.1.0. I am wanting to build a simple sinatra/ruby app to show the VE's on a node and their state. I have ruby 1.8.5 on CentOS 5.4. I have the basics of it worked out but am a little stuck. Is there a way of retrieving a list of all VM's on a host using ruby-libvirt. ie: virsh list --all ? @conn.list_defined_domains only shows VE's not started (lists VE names) @conn.list_domains only shows VE's running (lists VE id's) What I ultimately would like is to retrieve a full list of the uuid's of all defined VE's(running or not). -- Regards Mick Pollard ( lunix ) ------------------------------------------------ BOFH Excuse of the day: Extraneous Configuration Invalidation

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[libvirt-users] Windows Client
by Tim McLeod 28 Apr '10

28 Apr '10

Having newly compiled a Libvirt on a Windows Vista machine (many thanks to Matthias Bolte) I have attempted to connect to a remote Ubuntu machine using virsh.exe. However, the connection fails as follows: $ virsh -c qemu+tcp:///system error: unable to connect to libvirtd at 'localhost': errno=10061 error: failed to connect to the hypervisor 1. I have modified /etc/libvirt/libvirt.conf to set listen_tcp=1. 2. I cannot find /etc/sysconfig/libvirtd so I am unable to set LIBVIRTD_ARGS="--listen". As stated on a previous post, my background is Windows rather than Linux, so I am at a loss as to know where to look next. I would very much appreciate some guidance. Many thanks in anticipation... Tim McLeod

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Re: [libvirt-users] Libvirt Compilation on MS Vista
by Matthias Bolte 28 Apr '10

28 Apr '10

Ah, sorry. I've the scripts at hand. I just forgot to post them. I attached the scripts and added a readme file. I tested this on Windows XP, but it should work without problem on Windows Vista too. The scripts could still be improved, for example gathering all relevant files for a libvirt Windows SDK into a separate directory would be nice. If you have any problems or questions with/about this scripts please report/ask them. PS: You'll need to rename setup_msys.bat_ to setup_msys.bat. Matthias 2010/4/26 Tim McLeod <tim.mcleod(a)simulamen.eu>: > Matthias, > > Polite enquiry on the progress of tidying up scripts to automate the MinGW/MSYS setup and libvirt compilation on Windows, if I may? Not meaning to appear impatient, but I would like to give my client some indication of when I can meet my deliverables. Many thanks... > > Tim > > -----Original Message----- > From: Matthias Bolte [mailto:matthias.bolte@googlemail.com] > Sent: 21 April 2010 08:14 > To: tim.mcleod(a)simulamen.eu > Cc: libvirt-users(a)redhat.com > Subject: Re: [libvirt-users] Libvirt Compilation on MS Vista > > [Let's keep the list involved] > > 2010/4/20 Tim McLeod <tim.mcleod(a)simulamen.eu>: >> Matthias, >> >> Thank you for the swift response. Now, the current state is the result of following the instructions found a la Web in the attached 'print to PDF' file. Situation as follows: >> >> 1. MinGW. MinGW-5.1.4.exe installed without error; no issues. >> 2. MSYS. Failed to locate the executable MSYS-1.0.11-2004.04.30-1.exe, but MSYS-1.0.11.exe did install without error. >> 3. msysDTK. msysDTK-1.0.1.exe installed without error; no issues. >> 4. GTK. gtk-dev-2.12.9-win32-2.exe installed without error; no issues. >> 5. M4. Failed to locate compressed file m4-1.4.7-MSYS.tar.bz2, used m4-1.4.13-1-msys-1.0.11-bin.tar.lzma instead. Did not understand instruction to extract to the 'root' folder but instead replaced the original M4.exe found in C:\MSYS\1.0\bin with the M4.exe found in the lzma file. >> 6. Autoconf. Failed to 'make' source found in autoconf-2.62.tar.gz due to a '[m4sugar.m4f] Error 1' error, but following a reference found on the Web to this error not occurring in autoconf-2.52.tar.gz, successfully 'made' and installed this version. When moving on to step 7, Automake, compilation failed since autoconf 2.6 or newer was required. However, autoconf-2.60.tar.gz failed with the 'm4sugar.m4f' error in the same way as v2.62. >> >> Brick wall; sore head! As I'm sure you have guessed my background is MS Windows rather than Linux so I am finding these. Probably minor issues to you, extremely daunting and frustrating to me. I am encouraged that you have successfully compiled a Windows Libvirt client, hope you can point me in the right direction. Many thanks... >> >> Tim >> > > Okay, so the problem is setting up a working MinGW/MSYS environment. > You used the instructions posted here: > https://www.redhat.com/archives/libvir-list/2008-June/msg00145.html > > I didn't try that, but I wrote a set of scripts to automate the > MinGW/MSYS setup and libvirt compliation on Windows. I'll clean them > up a bit and post them, so you can try to use them. > > Probably we should also improve http://libvirt.org/windows.html with > more details. > > Matthias > >

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[libvirt-users] Using the host's LVM to manage virtual disks
by scar 27 Apr '10

27 Apr '10

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 i am envisioning a scenario that a fellow sysadmin is employing using xen, where the host is configured with LVM. basically, one volume group spans the physical disk. then, various logical volumes are created for the host and (Linux) guest OSes. this makes it easy to resize logical volumes should it be needed. is a setup like this possible with libvirt? the best i can think up, so far, is to create a new logical disk, vm1, and pass that as an argument to the -f option of virt-install. then, during the installation i can setup LVM within the guest. not sure if this would even work if i need to expand the volume size. first i would expand the size of vm1. then, within the vm1 OS i would expand the size of the root partition. i would like to not have to use this second layer of LVM. for example, on the host OS, i would create two logical volumes: vm1-root and vm1-swap, and these are what vm1 would use for root and swap. then, if needed, i can just increase the size of vm1-root, etc. thanks -----BEGIN PGP SIGNATURE----- iEYEAREIAAYFAkvSJ08ACgkQXhfCJNu98qDAoQCfbdN84rlxmFJCwHnsaHXdv0l4 juUAmwfE2Te+l07VfkuJYUI2/us83F5e =AmQ+ -----END PGP SIGNATURE-----

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[libvirt-users] Unable to switch ISO with virsh/kvm
by Don Morrison 26 Apr '10

26 Apr '10

I'd created a VM with "virsh create" that has a CD-ROM attached <disk type='file' device='cdrom'> <source file='/images/myiso_1.2.iso'/> <target dev='sdb' bus='scsi'/> <readonly/> <alias name='scsi0-0-1'/> <address type='drive' controller='0' bus='0' unit='1'/> </disk> Now I'd like to swap that iso out and mount a new one without taking down the guest. But it fails as follows: virsh detach-disk sles-11 sdb error: Failed to detach disk error: this function is not supported by the hypervisor: This type of device cannot be hot unplugged Attaching a new iso also fails. virsh attach-disk sles-11 /images/myiso_1.3,iso sdc --type cdrom --mode readonly error: Failed to attach disk error: internal error No device with bus 'scsi' and target 'sdc' I've tried all of the variations I can think of (including attach-device detach-device, ide vs scsi, block vs file, mounting an empty CDROM device, etc) and I can't get this to work. It does work when the VM is powered down, but I need to do the iso switch when the VM is up, which seems like pretty basic functionality if trying to install an OS that covers multiple ISOs. Is this expected to work? If so, any tips on what I'm doing wrong? Thanks. I'm running SLES 11 SP1 (beta) damkvm:/tmp # virsh --version 0.7.6 damkvm:/tmp # libvirtd --version libvirtd (libvirt) 0.7.6 damkvm:/tmp # virsh version Compiled against library: libvir 0.7.6 Using library: libvir 0.7.6 Using API: QEMU 0.7.6 Running hypervisor: QEMU 0.12.3 Don Morrison

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Re: [libvirt-users] Libvirt Compilation on MS Vista
by Matthias Bolte 26 Apr '10

26 Apr '10

[Let's keep the list involved] 2010/4/20 Tim McLeod <tim.mcleod(a)simulamen.eu>: > Matthias, > > Thank you for the swift response. Now, the current state is the result of following the instructions found a la Web in the attached 'print to PDF' file. Situation as follows: > > 1. MinGW. MinGW-5.1.4.exe installed without error; no issues. > 2. MSYS. Failed to locate the executable MSYS-1.0.11-2004.04.30-1.exe, but MSYS-1.0.11.exe did install without error. > 3. msysDTK. msysDTK-1.0.1.exe installed without error; no issues. > 4. GTK. gtk-dev-2.12.9-win32-2.exe installed without error; no issues. > 5. M4. Failed to locate compressed file m4-1.4.7-MSYS.tar.bz2, used m4-1.4.13-1-msys-1.0.11-bin.tar.lzma instead. Did not understand instruction to extract to the 'root' folder but instead replaced the original M4.exe found in C:\MSYS\1.0\bin with the M4.exe found in the lzma file. > 6. Autoconf. Failed to 'make' source found in autoconf-2.62.tar.gz due to a '[m4sugar.m4f] Error 1' error, but following a reference found on the Web to this error not occurring in autoconf-2.52.tar.gz, successfully 'made' and installed this version. When moving on to step 7, Automake, compilation failed since autoconf 2.6 or newer was required. However, autoconf-2.60.tar.gz failed with the 'm4sugar.m4f' error in the same way as v2.62. > > Brick wall; sore head! As I'm sure you have guessed my background is MS Windows rather than Linux so I am finding these. Probably minor issues to you, extremely daunting and frustrating to me. I am encouraged that you have successfully compiled a Windows Libvirt client, hope you can point me in the right direction. Many thanks... > > Tim > Okay, so the problem is setting up a working MinGW/MSYS environment. You used the instructions posted here: https://www.redhat.com/archives/libvir-list/2008-June/msg00145.html I didn't try that, but I wrote a set of scripts to automate the MinGW/MSYS setup and libvirt compliation on Windows. I'll clean them up a bit and post them, so you can try to use them. Probably we should also improve http://libvirt.org/windows.html with more details. Matthias

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[libvirt-users] Problems moving qemu machine to libvirt
by Erik de Castro Lopo 26 Apr '10

26 Apr '10

Hi all, I have a qemu-system-arm machine that I am currently starting using: qemu-system-arm -M versatilepb -nographic \ -hda img.qcow2 \ -net vde,vlan=0,sock=/var/run/qemu-vde.ctl \ -net nic,vlan=0,macaddr=52:54:00:12:34:22 \ -kernel vmlinuz-2.6.18-6-versatile \ -initrd initrd.img-2.6.18-6-versatile \ -append "root=/dev/sda1 console=ttyAMA0,115200n8" I converted the above to a virsh XML file using: virsh domxml-from-native qemu-argv run.argc > arm32.xml which resulted in this (minor modifications to provide full paths): <domain type='qemu'> <name>arm32</name> <uuid>e433002b-107f-5b16-415b-7afb3e3a4d84</uuid> <memory>262144</memory> <currentMemory>262144</currentMemory> <vcpu>1</vcpu> <os> <type arch='arm' machine='versatilepb'>hvm</type> <kernel>/kvm/arm32/vmlinuz-2.6.18-6-versatile</kernel> <initrd>/kvm/arm32/initrd.img-2.6.18-6-versatile</initrd> </os> <features> <acpi/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/kvm/arm32/arm32.sh</emulator> <disk type='file' device='disk'> <source file='/kvm/arm32/img.qcow2'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'/> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target port='0'/> </console> </devices> </domain> Since libvirt doesn't support VDE networking I use a wrapper around qemu-system-arm (/kvm/arm32/arm32.sh) containing: #!/bin/bash exec /usr/bin/qemu-system-arm $@ \ -net nic,vlan=0,macaddr=52:54:00:12:34:22 \ -net vde,vlan=0,group=vde2-net,mode=0770,sock=/var/run/qemu-vde.ctl \ -append "root=/dev/sda1 console=ttyAMA0,115200n8" However, doing this I get the following error when I attempt to start the VM: error: Failed to start domain arm32 error: internal error Process exited while reading console log output: char device redirected to /dev/pts/10 qemu: could not open disk image console=ttyAMA0,115200n8\"": No such file or directory The first problem (console log output) is probably due to the second, where it seems that this: <cmdline>root=/dev/sda1 console=ttyAMA0,115200n8</cmdline> is not being passed to qemu correctly. I have tried quoting the command line but that doesn't help. Anyone have any clues? Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

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