Re: [Fedora-xen] [f20] Problem with libvirt + Xen XL toolstack

[Konrad Rzeszutek Wilk]

On Tue, Nov 11, 2014 at 05:21:30PM +0100, Marco Guazzone wrote:
>  On Tue, Nov 11, 2014 at 4:53 PM, Konrad Rzeszutek Wilk
>  <konrad.wilk(a)oracle.com&gt; wrote:
>  
>  Hi Konrad,
>  
>  >> 1. Disable SElinux
>  >>   $ vi /etc/selinux/config
>  >>     SELINUXTYPE=disabled
>  >
>  > Uh, not sure why you need that?
>  
>  Just to avoid any possible interference... And, because I've found it
>  at the Xen wiki
>  
>  http://wiki.xen.org/wiki/Fedora_Host_Installation
>  
>  >> 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.
>  
>  Similarly as above, I've disabled it to avoid any possible issue.
>  Also, found it at the Xen wiki:
>  
>  http://wiki.xen.org/wiki/Fedora_Host_Installation
>   
gosh, thank you for reporting that. I've updated the Wiki pages to reflect
the status on Fedora 21.
>  
>  
>  >
>  > 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).
>  
>  
>  You are true. I've used to use virt-install until it stopped to
>  support the xl toolstack (since Fedora 16).
>  Maybe now is working again...
>  Anyway, I've used xl just to check that the VM is working with Xen's xl alone.
>  
>  
>  >>        <interface type='bridge'>
>  >>          <mac address='00:00:00:00:00:00'/>
>  >
>  > Uuiuuh. Is that right? Shouldn't it have some value?
>  
>  This is just  what libvirt translates from the native config file
>  
>  >>
>  >> 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'.
>  >
>  
>  Renamed the bridge to 'xenbr0':
>  
>  xenbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>          inet 10.10.15.10  netmask 255.255.255.0  broadcast 10.10.15.255
>          inet6 fe80::219:99ff:feef:62ab  prefixlen 64  scopeid 0x20<link>
>          ether 00:19:99:ef:62:ab  txqueuelen 0  (Ethernet)
>          RX packets 8  bytes 1144 (1.1 KiB)
>          RX errors 0  dropped 0  overruns 0  frame 0
>          TX packets 8  bytes 648 (648.0 B)
>          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>  
>  rebooted the machine... But same error 
I presume you also changed the entry in the xml file?

>  
>  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
>  
>  > 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.
>  >
>  
>  
>  Could you be more specific. Sorry, I'm not a sysadmin.
>  I'm using Xen for research purpose 
Edit /etc/libvirt/libvirtd.conf

and change 'log_level' to be 'log_level=4'

and make sure that 'log_output' has '"1:syslog:libvirtd"

>  
>  Thank you very much!
>  
>  -- Marco
>  --
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