[libvirt-users] invalid argument error when using cache parameter
by Igor Serebryany
hi,
i tried to add a 'cache' argument to the 'driver' element in my
domainxml for qemu/kvm. i tried adding cache="none" as well as
"writethrough" and "writeback", but every time i get these errors:
libvirtError: internal error process exited while connecting to monitor: char device redirected to /dev/pts/1
qemu: could not open disk image /vms/test.img: Invalid argument
the full driver line looks like this:
<driver name="qemu" type="raw" cache="none"/>
the same domainxml works just fine without the cache parameter. does
anyone know what i'm doing wrong? is there some other way to set the
default cache policy on qemu/kvm? i didn't see anything in the
config file...
--igor
13 years, 6 months
[libvirt-users] git repository access via HTTPS
by Fyodor Kupchik
Hi,
I've just tried to do a fresh checkout (git clone) with libvirt sources tree
and had no luck because it seems to be inaccessible/non-existent at all. Is
this temporary situation or I have to only use git:// proto?
I'm asking because I'm sitting behind rather restrictive corporate proxy
which does not allow anything but a little set of protocols such as HTTP(S).
Thanks.
13 years, 6 months
[libvirt-users] libvirt and shared storage SAN Fiber Channel
by Frederic SOULIER
Hi,
I'm looking information about using libvirt with san (fiber channel)
based storage and googling for a while i don't see anything about it.
I send this email in order to get advices about libvirt and shared storage
We use here, for 3 years now, 8 linux centos server connected to an
hitachi FC SAN (multipath devices).
Each server run Xen dom0 and use SAN LUNs to store Virtual machine
filesystem ( basically one LUN per VM).
For each LUN we create an LVM VolGroup. On each VolGroup we create
Logical volumes (one for swap, one for root filesystem).
We present to the vm the 2 Logical Volume as it was raw disk.
In this system we can make live migration between host using local
scripts which assume than one VolumeGroup is used only by one host at
the same time on the 8 node "cluster". We don't use any clustered aware
environment like CLVM.
We plan to migrate to kvm and libvirt with the new centos release
(CentOS 6).
Reading the upstream documentation and libvirt i don't find anything
about using libvirt with san storage except for iscsi.
Do you have any link or idea about using kvm + libvirt + SAN FC storage
that permit to make live migration between node (we think about RHCS
with GFS2 but it seems very complex to set up) ?
Do you think i can use the LUN's SAN as local storage on each node. For
each LUN create an LVM Volume Group (same on each node, like that we
doing now with xen) and use it as volume pool in libvirt.
Is volume pool in libvirt is 'cluster aware' (Can i access it
simultaneously from different node) ?
I'm beginner in kvm so any advice will be great.
regards
--
Frederic Soulier
DSI / Service Système
Université Toulouse 1 Capitole
2 rue du doyen Gabriel Marty
31 042 Toulouse Cedex 9
Tel: +33 5 61 63 39 98 Fax: +33 5 61 63 37 98
13 years, 6 months
[libvirt-users] Cgroup
by Nikita A Menkovich
Hello,
I'm running Debian Sid with libvirt/qemu/kvm packages from experimental:
$ qemu --version
QEMU emulator version 0.13.0 (Debian 0.13.0+dfsg-2), Copyright (c)
2003-2008 Fabrice Bellard
$ kvm --version
QEMU emulator version 0.13.0 (qemu-kvm-0.13.0 Debian 0.13.0+dfsg-2),
Copyright (c) 2003-2008 Fabrice Bellard
$ libvirtd --version
libvirtd (libvirt) 0.8.6
/etc/libvirt/qemu.conf
cgroup_controllers = [ "cpu", "devices" ]
cgroup_device_acl = [
"/dev/null", "/dev/full", "/dev/zero",
"/dev/random", "/dev/urandom",
"/dev/ptmx", "/dev/kvm", "/dev/kqemu",
"/dev/rtc", "/dev/hpet", "/dev/net/tun",
]
/etc/cgconfig.conf
mount {
cpu = /dev/cgroup/cpu;
cpuacct = /dev/cgroup/cpuacct;
devices = /dev/cgroup/devices;
# memory = /dev/cgroup/memory;
blkio = /dev/cgroup/blkio;
}
When I'm running virsh, and want to change cpu shares I receive an error
virsh # schedinfo --set cpu.shares=2048 test
Scheduler : posix
error: internal error cannot find cgroup for domain test
Really I didn't have any group test in
$ ls /dev/cgroup/cpu/sysdefault/libvirt/qemu/
cgroup.clone_children cgroup.event_control cgroup.procs cpu.shares
notify_on_release tasks
It happens if I run libvirt as usual user, how can I grant access to
create cgroup to ordinary user?
--
Nikita A Menkovich
JID: menkovich(a)gmail.com
13 years, 6 months
[libvirt-users] Python Bindings for Python 2.7
by vipul borikar
Hello,
I want to source compile the libvirt 0.8.4 with its Python
bindings.
I have python 2.4 rpm installed but i dont use it. I use Python 2.7 source
compiled version.
So when i compile libvirt it produces bindings for Python 2.4 which is
obvious choice since it is rpm.
So how should i make it point to Python 2.7 so that it produces bindings for
it. Installed path of Python 2.7 is /opt/Python2.7.
Please Guide me.
Thanks
Vipul
13 years, 6 months
[libvirt-users] virt-install with --channel option inquiry
by Hongqing Yang
hi, virt guys,
This is Hongqing from Fedroa QA team. I try to forward the guest installation logs to host with virtio.
I have used virsh edit <guestName> to add a channel, it works fine.
I think it would be better if I can initialize it when I create the guest using virt-install,
and virt-install also offers the option, I have tried below, but it does not work.
virt-install
--connect qemu:///system \
--virt-type kvm \
--name demo2 \
--ram 500 \
--disk path=/home/hongqing/testscript/demo2.img,size=10,sparse=true \
--accelerate \
--cdrom /home/hongqing/fedora/Fedora-14-x86_64-DVD.iso \
--channel tcp host=127.0.0.1:6080 mode=connect target_type=virtio name=org.fedoraproject.anaconda.log.0
error message is :
ERROR internal error Process exited while reading console log output: char device redirected to /dev/pts/20
getaddrinfo(127.0.0.1,None): Servname not supported for ai_socktype
chardev: opening backend "socket" failed
both the host and guest are fedaora 14.
I have checked the service syslog with port 6080 is listening. and also I have disabled the SElinux.
Do you have any idea about this? Thanks for taking time to view it.
Hongqing YANG
13 years, 6 months
[libvirt-users] Getting CPU and memory usage statistics for the host
by Guido Winkelmann
Hi,
I have noticed that virt-manager has the ability to show me the current cpu- and
memory-usage of both the host and running guest machines.
How does it do that?
I could make good use of that information myself in the client applications I'm
writing, however, from what I can see on
http://libvirt.org/html/libvirt-libvirt.html, I have no idea how to go about
getting it from libvirt. In fact, before I've seen virt-manager, I just assumed
libvirt cannot do that at all, and was planning to manually ssh to the host and
read statistics from /proc when I'd need them.
I've tried looking at the virt-manager source code to find out how to do this,
but it appears I would have to learn Python first in order to understand it.
Could someone please give me some pointers?
Regards,
Guido
13 years, 6 months
[libvirt-users] host to VM serial device configuration
by John Paul Walters
Hi,
I'm trying to get a virtual serial device up and running between my
host and virtual machine with a device name on the host. I'm using
libvirt 0.8.3 and qemu 0.13.0. The challenge that I'm running into is
that I'm able to get a serial device, but I cannot fix it to a pre-
defined device name. For example, I'm using the following in my VM's
xml file:
<serial type='pty'>
<source path='/dev/pts/19' />
<target port='0' />
</serial>
As I said this works, but it doesn't set the host side to /dev/pts/
19. Is there any way to do this?
thanks,
JP
13 years, 6 months
[libvirt-users] Libvirt Windows 0.8.7 installer available
by Justin Clift
Hi all,
The Libvirt 0.8.7 installer for Windows is now available online:
http://libvirt.org/sources/win32_experimental/Libvirt-0.8.7-2.exe
Changes for this release include:
+ VirtualBox support on Windows, as added to the main Libvirt
0.8.7 release.
I haven't personally tested this yet, so if someone has the time to
test and report/confirm it's working, that would be really helpful.
+ There is now an option to update the system PATH with the
libvirt binaries location, so they don't have to be copied around
if you're using the .dlls elsewhere.
+ The README text has been tweaked to be less confusing for
vSphere ESX users reading about TLS certificates
All thoughts and feedback are welcome. :)
Regards and best wishes,
Justin Clift
13 years, 6 months
[libvirt-users] list mac or IP of all guests NICs?
by Josiah Ritchie
I'm trying to figure out how to use virsh (or something else) to list all
the IP addresses (or MAC addresses if needed) for each virtual NIC,
preferably with it domain affiliation also listed.
Is this possible?
Thanks,
JSR/
13 years, 6 months
