On Tue, Nov 11, 2014 at 03:50:19PM +0100, Marco Guazzone wrote:
Hello,
Since when libvirt has introduced support for the Xen XL toolstack, I
was unable to make it work together.
With Fedora 20 x86_64, still I have problems and the only way to use
libvirt+Xen is to use the old xend toolstack.
Can anybody help me?
Here's below is my test. Sorry, the mail is very long...
1. Disable SElinux
$ vi /etc/selinux/config
SELINUXTYPE=disabled
Uh, not sure why you need that?
2. Install Xen and libvirt
$ yum install xen
$ yum install libvirt-daemon-xen libvirt-client
3. Disable Network Manager
$ systemctl disable NetworkManager
$ systemctl stop NetworkManager
Network Manager can deal with the bridge as you have
NM_CONTROLLED=no set in it.
4- Create network bridge
$ vi /etc/sysconfig/network-
scripts/ifcfg-br0
DEVICE=br0
TYPE=Bridge
BOOTPROTO=none
ONBOOT=yes
IPADDR=10.10.15.2
NETMASK=255.255.255.0
STP=yes
DELAY=0
DEFROUTE=yes
USERCTL=no
NM_CONTROLLED=no
$ vi /etc/sysconfig/network-scripts/ifcfg-em2
NAME=em2
TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
BRIDGE=br0
PEERDNS=yes
PEERROUTES=yes
DEFROUTE=yes
USERCTL=no
NM_CONTROLLED=no
5. Enable classic networking
$ systemctl enable network
$ systemctl start network
6. Reboot with Xen
7. Check xend toolstack is disabled
$ systemctl is-enabled xend
disabled
8. Create a test VM
$ qemu-img-xen create -f raw test.img 10G
I've never seen that tool!
$ vi testvm.cfg
name = "testvm"
uuid = "93f08541-bfd5-4ac4-851d-c619a4516a13"
builder = "hvm"
maxmem = 3072
memory = 2048
vcpus = 1
on_crash = "restart"
disk = [ "file:/root/images/testvm.img,hda,w",
"file:/root/iso/CentOS-7.0-1406- x86_64-Minimal.iso,hdc:cdrom,r" ]
You seem to have a space in there, but htat is probably due to paste.
vif = [ "bridge=br0,script=vif-bridge" ]
boot = "cd"
sdl = 0
vnc = 1
vncunused = 1
xen_platform_pci = 1
$ xl create testvm.cfg
Why don't you just use 'virt-install' outright instead of doing
it via xl and such?
It also takes care of your images having the right SELinux permissions
(I believe so).
9. Open vncviewer and perform installation
10. Shutdown just created VM
11. Create a libvirt XML file
$ virsh -c xen:/// domxml-from-native xen-xm testvm.cfg > testvm.xml
<domain type='xen'>
<name>testvm</name>
<uuid>93f08541-bfd5-4ac4-851d-c619a4516a13</uuid>
<memory unit='KiB'>3145728</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<vcpu placement='static'>1</vcpu>
<os>
<type arch='x86_64' machine='xenfv'>hvm</type>
<loader>/usr/lib/xen/boot/hvmloader</loader>
<boot dev='hd'/>
<boot dev='hd'/>
</os>
<clock offset='variable' adjustment='0' basis='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<disk type='file' device='disk'>
<driver name='file'/>
<source file='/root/images/testvm.img'/>
<target dev='hda' bus='ide'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='file'/>
<source file='/root/iso/CentOS-7.0-1406-x86_64-Minimal.iso'/>
<target dev='hdc' bus='ide'/>
<readonly/>
</disk>
<interface type='bridge'>
<mac address='00:00:00:00:00:00'/>
Uuiuuh. Is that right? Shouldn't it have some value?
<source bridge='br0'/>
<script path='vif-bridge'/>
</interface>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='-1' autoport='yes'/>
</devices>
</domain>
12. Start the VM with libvirt
$ virsh create testvm.xml
BOOOM:
error: Failed to create domain from testvm.xml
error: End of file while reading data: Input/output error
error: One or more references were leaked after disconnect from the hypervisor
error: Failed to reconnect to the hypervisor
So earlier version of libvirt (Fedora 20) has issues if the bridge
was called anything but 'xenbr0' it would fail. Later (Fedora 21) is OK with it.
I think that is what you are hitting (I was hitting that in Fedora 20
when I was testing it out for Beta).
Try changing the bridge name to 'xenbr0'.
IF that does not help, edit the libvirt.cfg file to crank up the debugging
and use 'journalctl -x' to see what it complains about.
Thank you very much for your time.
Best,
-- Marco
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