[libvirt-users] Using IVSHMEM with Libvirt
by Qasim Maqbool
Hi,
I am trying to create a VM with the IVSHMEM feature, and I specify the
device using qemu command line argument in my XML by using the pass through
tag as follows:
<qemu:commandline>
<qemu:arg value='-device
ivshmem,size=2048M,shm=fd:/mnt/huge/map_1:0x0:0x40000000:/dev/zero:0x0:0x3fffc000:/var/run/.ivshmem_metadata_config_2:0x0:0x4000'/>
</qemu:commandline>
This seemingly does not work as I get this error:
Internal error process exited while connecting to monitor:
qemu-system-x86_64: -device
ivshmem,size=2048M,shm=fd:/mnt/huge/map_1:0x0:0x40000000:/dev/zero:0x0:0x3fffc000:/var/run/.ivshmem_metadata_config_2:0x0:0x4000:
invalid option
Can anyone point out what I am doing wrong here? Thanks.
Qasim
10 years, 7 months
[libvirt-users] Libvirt qemu permission denied error
by Asadullah Hussain
Hello,
I am trying run a simple VM (qemu1.4.2) on RHEL 6.5 through libvirt (0.10).
virsh create throws the error:
*error: Failed to create domain from vm1.xml*
*error: internal error process exited while connecting to monitor:*
The libvirt log for VM shows:
*libvir: error : cannot execute binary /usr/bin/qemu-system-x86_64:
Permission denied*
I am running VM as root and all disk images/ISOs required for VM are
read/write/executable.
--
Asadullah Hussain
10 years, 7 months
[libvirt-users] TLS and intermediate CA
by Nathaniel Cook
I have been trying to get set of libvirtd system up and running. My PKI
infrastructure involves a root CA and several intermediate CAs. I am trying
to get the machines to trust each other across the different intermediate
CAs.
This is what I have so far:
Libvirtd is starting and listening on tls port 16514 I have configured
client/server certs/keys and it seems to be using all of these correctly.
I have also configured the cacert.pem file (which has two certs in the
chain). I have confirmed (recompiling with various debug statements) that
the gnutls libraries are successfully loading both certs from the
cacert.pem file.
When I try to connect with openssl s_client -connect <host>:16514 I get
something similar to this:
---
Certificate chain
0 s:/CN=kvm999.example.com
i:/C=US/ST=Utah/O=Qualtrics/OU=SRE/CN=intca1.example.com
---
Server certificate
-----BEGIN CERTIFICATE-----
... omitted for brevity
-----END CERTIFICATE-----
subject=/CN=kvm999.example.com
issuer=/C=US/ST=Utah/O=Qualtrics/OU=SRE/CN=intca1.example.com
---
Acceptable client certificate CA names
/C=US/ST=Utah/O=Qualtrics/OU=SRE/CN=intca1.example.com
/C=US/ST=Utah/O=Qualtrics/OU=SRE/CN=rootca.example.com
---
The "Server certificate" and "Acceptable client certificate CA names" look
right. The problem is that the certificate chain is just the single server
cert and does not include the intermediate cert or root cert. As a result
clients from other intermediate CAs fail to verify the libvirtd process.
I have tried libvirtd 0.10.2 and 1.2.1 both on CentOS 6.
Thanks.
--
-Nathaniel Cook
10 years, 7 months
[libvirt-users] Live snapshot merging (qemu 2.0)
by Thomas Stein
Hello.
The Changelog of qemu-2.0.0 mentioned "Live snapshot merging". Someone
has an idea what could be ment by this? I'm asking because i'm still
struggling with finding a reliable backup solution for running kvm
machines. Blockcopy is my current solution.
best regards
Thomas
10 years, 7 months
[libvirt-users] "virt-install" source location boot disk
by Jay Vyas
Hi virt, im stumped... any help would be appreciated.
I normally create my VMs like this:
base="http://mirror.pnl.gov/fedora/linux/releases/20/Fedora/x86_64/os/"
sudo virt-install --hvm --name $vm_name$i --ram 4000 \
--disk path=/VirtualMachines/$vm_name$i,size=30 \
--location $base -x "ks=http://xxx.os21.ks$kx"
HOWEVER... I'm finding that my VMs dont boot after i restart the Host.
My question is: Where is virt-install writing the boot disk to?
I get a error message that the "boot failed" because the hard disk, is
not a bootable disk.
But I can't imagine where else to boot from ? Because I point
my --location of the original boot to the source code repo itself....
ANY help would be appreciated thanks!
10 years, 7 months
[libvirt-users] routed subnet problem
by Patric Buskas
Hi,
I'm new to libvirt so please bear with me.
I am trying to set up a routed subnet on my laptop with libvirt, hoping it
to be able to communicate with all servers in my nw.
My laptop is on a subnet, 192.168.2.0/24, with a static ip, 192.168.2.27.
I have "more or less" followed this guide for routed networks,
https://www.berrange.com/posts/2009/12/13/routed-subnets-without-nat-for-...
The "more or less" part is that I have a Asus RT-N56U router with the
static route set as in the guide and I'm not running wifi.
With this setup I can reach, within the 192.168.200.0/24, all guests within
192.168.200.0/24, internet and the laptop but I can not reach any server on
the laptop subnet.
traceroute from guests to servers in the laptop subnet is only giving
"stars" infinitely
nmap from guests to services in the laptop subnet is saying "filtered"
Obviously I've done something wrong but I can't find out what.
I also may have misunderstood the meaning of routed network within libvirt.
Please give me some advise to solve this problem.
Some facts:
The laptop is running Ubuntu 13.04
The net-dumpxml
https://gist.github.com/kakbit/11103807
Routing on laptop
https://gist.github.com/kakbit/11103832
iptables on laptop
https://gist.github.com/kakbit/11103947
10 years, 7 months
[libvirt-users] Guest Virtual Bios in XEN
by Mui Le Van
Hi,
I am using Libvirt with XEN hypervisor to manage the VM.
I see there are 3 kinds of Virtual BIOS for XEN Guest VM, they are
ROMBIOS,SEABIOS,
OVMF ( is disabled by default as XEN Supporters said ).
But I don't know how to pass the BIOS options to the Guest from XML file.
Could you please suggest how to change the Virtual BIOS for the Guest from
XML file in Libvirt or give some clues to do that?
Below is the link that I asked XEN support:
http://osdir.com/ml/general/2014-04/msg32102.html
Thank for your time!
Mui Le,
10 years, 7 months
[libvirt-users] (no subject)
by Mui Le Van
Hi,
I am using Libvirt with XEN hypervisor to manage the VM.
I see there are 3 kinds of Virtual BIOS for XEN Guest VM, they are
ROMBIOS,SEABIOS,
OVMF ( is disabled by default as XEN Supporters said ).
But I don't know how to pass the BIOS options to the Guest from XML file.
Could you please suggest how to change the Virtual BIOS for the Guest from
XML file in Libvirt or give some clues to do that?
Below is the link that I asked XEN support:
http://osdir.com/ml/general/2014-04/msg32102.html
Thank for your time!
10 years, 7 months
[libvirt-users] LXC + USB passthrough = Operation not permitted
by Filip Maj
Hi!
First post, kind of a noobie. I've been working with LXC and libvirt for a
few months now. Trying to do some interesting things with containers and
Android devices :D
I'm running ubuntu 13.10 with LXC 1.0.1 and tried both libvirt 1.1.1 and
1.2.2 (backported from ubuntu-trusty), but with either version of libvirt
am getting issues as soon as I try to get access to USB devices inside the
container.
Relevant versions of stuff:
$ dpkg -l | grep -i lxc
ii liblxc1 1.0.1-0ubuntu1~ubuntu13.10.1~ppa1
i386 Linux Containers userspace tools (library)
ii lxc 1.0.1-0ubuntu1~ubuntu13.10.1~ppa1
i386 Linux Containers userspace tools
ii lxc-templates 1.0.1-0ubuntu1~ubuntu13.10.1~ppa1
i386 Linux Containers userspace tools (templates)
ii python3-lxc 1.0.1-0ubuntu1~ubuntu13.10.1~ppa1
i386 Linux Containers userspace tools (Python 3.x bindings)
$ dpkg -l | grep libvirt
ii libvirt-bin 1.2.2-0ubuntu12
i386 programs for the libvirt library
ii libvirt0 1.2.2-0ubuntu12
i386 library for interfacing with different virtualization systems
ii python-libvirt 1.2.2-0ubuntu1
i386 libvirt Python bindings
Here's my entire domain definition:
<domain type='lxc'>
<name>oshi32134</name>
<uuid>xxxxx</uuid>
<memory unit='KiB'>3145728</memory>
<currentMemory unit='KiB'>3145728</currentMemory>
<vcpu placement='static'>1</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='i686'>exe</type>
<init>/sbin/init</init>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/lib/libvirt/libvirt_lxc</emulator>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/some/valid/filesystem/location'/>
<target dir='/'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/another/valid/filesystem/location'/>
<target dir='/mnt/android'/>
</filesystem>
<interface type='bridge'>
<mac address='xx:xx:xx:xx:xx:xx'/>
<source bridge='br1'/>
</interface>
<console type='pty'>
<target type='lxc' port='0'/>
</console>
<hostdev mode='capabilities' type='misc'>
<source>
<char>/dev/kvm</char>
</source>
</hostdev>
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x04e8'/>
<product id='0x6860'/>
</source>
</hostdev>
</devices>
</domain>
Everything worked fine until I added the USB <hostdev> element. I'm
essentially trying to get access to a physical Android device connected to
the host from inside a container. When I go to start the container, I get
an error about Operation not permitted. Here's the relevant bits from
/var/log/libvirt/lxc/machine.log:
2014-04-11 22:46:40.491+0000: starting up
PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin
LIBVIRT_DEBUG=3 LIBVIRT_LOG_OUTPUTS=3:stderr /usr/lib/libvirt/libvirt_lxc
--name oshi32134 --console 24 --security=none --handshake 27 --background
--veth vnet1
2014-04-11 22:46:40.597+0000: 685: info : libvirt version: 1.2.2
2014-04-11 22:46:40.597+0000: 685: error :
virLXCControllerSetupHostdevSubsysUSB:1390 : Unable to create device
//var/run/libvirt/lxc/oshi32134.dev/bus/usb//002//003: Operation not
permitted
Unable to create device
//var/run/libvirt/lxc/oshi32134.dev/bus/usb//002//003: Operation not
permitted
I get the same output above when I use libvirt 1.1.1.
Tracing down through the libvirt code it looks like it fails when calling
`mknod`. It's clear that libvirt converts the product/vendor ids I
specified in the domain definition file to the appropriate USB bus
(/dev/bus/usb/002/003, verified by comparing against output of
`usb-devices`).
In a parallel effort, a colleague of mine set up a vanilla LXContainer on a
new install of the same version of ubuntu, and successfully was able to
communicate with the Android device from a container. The only
configuration tweaks he made was make sure to whitelist the cgroup with the
appropriate major/minor device number (associated with the Android device)
inside the LXC configuration file. From there the container was able to
appropriately create the device file as you attach/detach the Android
device.
Hopefully someone can shed some light, and appreciate your patience with me
as I am learning a lot of this stuff as I go :)
Thanks in advance for any help!
Fil
10 years, 7 months
[libvirt-users] virsh blockcommit hangs at 100%
by zyro
hi,
i am trying to blockcommit a external qcow2 snapshot back into its raw
backing file like:
sudo virsh blockcommit myDomainName vda --wait --verbose
the output just shows:
Block Commit: [100 %]
and stays like that (i waited about an hour or so...). No "Commit
complete" message.
- explicitly passing --base and/or --top arguments makes no difference.
- did not find a related log entry in syslog and consorts
env:
- ubuntu server 14.04 x64
- libvirt-bin 1.2.2-0ubuntu13
i doubt that it just takes hours to complete after "100%", right?
any ideas? kind of a dead-end for me :/
thanks,
zyro
10 years, 7 months
