Xen users - Nov 2007 - Problem while installing XEN 3.1 on Fedora 6

Hi,

I downloaded XEN 3.1 source code on a fedora 6 machine.
I did
# make world
# make install

It did not give me an error then when I restarted the machine the Grub
did not have 2 options. It had only one option that was the kernel.
On loading the OS, when i gave
# xend
it gives the following errors:
[root@localhost sbin]# xend
ERROR Internal error: Could not obtain handle on privileged command
interface (2 = No such file or directory)
ERROR Internal error: Could not obtain handle on privileged command
interface (2 = No such file or directory)
Traceback (most recent call last):
  File "/usr/sbin/xend", line 42, in ?
    from xen.xend.server import SrvDaemon
  File "//usr/lib/python/xen/xend/server/SrvDaemon.py", line 26, in ?
    import relocate
  File "//usr/lib/python/xen/xend/server/relocate.py", line 26, in ?
    from xen.xend import XendDomain
  File "//usr/lib/python/xen/xend/XendDomain.py", line 35, in ?
    from xen.xend import XendOptions, XendCheckpoint, XendDomainInfo
  File "//usr/lib/python/xen/xend/XendCheckpoint.py", line 22, in ?
    from xen.xend.XendConfig import XendConfig
  File "//usr/lib/python/xen/xend/XendConfig.py", line 27, in ?
    from xen.xend.XendDevices import XendDevices
  File "//usr/lib/python/xen/xend/XendDevices.py", line 22, in ?
    from xen.xend.server import blkif, netif, tpmif, pciif, iopif,
irqif, usbif, vfbif
  File "//usr/lib/python/xen/xend/server/pciif.py", line 38, in ?
    xc = xen.lowlevel.xc.xc()
xen.lowlevel.xc.Error: (1, ''Internal error'', ''Could
not obtain handle
on privileged command interface (2 = No such file or directory)'')

Can anyone tell me what has gone wrong and how I can correct this?

thanks & regards
raghu


-- 
http://www.public.asu.edu/~rsriniv8/

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raghunathan srinivasan wrote:
> Hi,
>
> I downloaded XEN 3.1 source code on a fedora 6 machine.
> I did
> # make world
> # make install
>
> It did not give me an error then when I restarted the machine the Grub
> did not have 2 options. It had only one option that was the kernel.
> On loading the OS, when i gave
>   
Right. The source code does not have the smarts to run "grubby" and
set
up the kernel. This is what you get for using source code, and not an 
RPM. Go ahead and take a look at the SRPM and the .spec file to see 
exactly how it uses grubby, and reset your default kernel, and
reboot.
> # xend
> it gives the following errors:
> [root@localhost sbin]# xend
> ERROR Internal error: Could not obtain handle on privileged command
> interface (2 = No such file or directory)
> ERROR Internal error: Could not obtain handle on privileged command
> interface (2 = No such file or directory)
> Traceback (most recent call last):
>   File "/usr/sbin/xend", line 42, in ?
>     from xen.xend.server import SrvDaemon
>   File "//usr/lib/python/xen/xend/server/SrvDaemon.py", line 26,
in ?
>     import relocate
>   File "//usr/lib/python/xen/xend/server/relocate.py", line 26,
in ?
>     from xen.xend import XendDomain
>   File "//usr/lib/python/xen/xend/XendDomain.py", line 35, in ?
>     from xen.xend import XendOptions, XendCheckpoint, XendDomainInfo
>   File "//usr/lib/python/xen/xend/XendCheckpoint.py", line 22, in
?
>     from xen.xend.XendConfig import XendConfig
>   File "//usr/lib/python/xen/xend/XendConfig.py", line 27, in ?
>     from xen.xend.XendDevices import XendDevices
>   File "//usr/lib/python/xen/xend/XendDevices.py", line 22, in ?
>     from xen.xend.server import blkif, netif, tpmif, pciif, iopif,
> irqif, usbif, vfbif
>   File "//usr/lib/python/xen/xend/server/pciif.py", line 38, in ?
>     xc = xen.lowlevel.xc.xc()
> xen.lowlevel.xc.Error: (1, ''Internal error'',
''Could not obtain handle
> on privileged command interface (2 = No such file or directory)'')
>
> Can anyone tell me what has gone wrong and how I can correct this?
>   
Yes, upgrade to Fedora Release 7, and use the kernek-xen RPM if you can.

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thanks for that.

I actually wanted to use the source code as I wanted to make small
changes to XEN and recompile it. If I use the RPM can I recompile the
code?

I tried making changes to the grub.conf file. It has the following
contents, my paths are relative to /boot:

title Fedora Core (2.6.18-1.2798.fc6)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-1.2798.fc6 ro
root=/dev/VolGroup00/LogVol00 rhgb quiet
        initrd /initrd-2.6.18-1.2798.fc6.img
title XEN 3.1 /XenLinux 2.6
        kernel /xen-3.1.gz console=vga
        module /vmlinuz-2.6-xen root=/dev/VolGroup00/LogVol00 console=tty0

I made these entries using the documentation on XEN.  On booting that
kernel it displays some commands and then it displays kernel panic and
reboots the machine.

Is it because I dont have an initrd entry for it? There is no initrd
file corresponding to XEN in the boot directory.

thanks & regards.

raghu

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~``
>Right. The source code does not have the smarts to run "grubby"
and set
>up the kernel. This is what you get for using source code, and not an
>RPM. Go ahead and take a look at the SRPM and the .spec file to see
>exactly how it uses grubby, and reset your default kernel, and reboot.
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raghunathan srinivasan wrote:
> thanks for that.
>
> I actually wanted to use the source code as I wanted to make small
> changes to XEN and recompile it. If I use the RPM can I recompile the
> code?
>   
Oh, yes. Start with the SRPM, and be ready to spend some time waiting 
for it to compile. And make sure to reset the %release setting in the 
.spec file.

> I tried making changes to the grub.conf file. It has the following
> contents, my paths are relative to /boot:
>
> title Fedora Core (2.6.18-1.2798.fc6)
>         root (hd0,0)
>         kernel /vmlinuz-2.6.18-1.2798.fc6 ro
> root=/dev/VolGroup00/LogVol00 rhgb quiet
>         initrd /initrd-2.6.18-1.2798.fc6.img
> title XEN 3.1 /XenLinux 2.6
>         kernel /xen-3.1.gz console=vga
>         module /vmlinuz-2.6-xen root=/dev/VolGroup00/LogVol00 console=tty0
>
> I made these entries using the documentation on XEN.  On booting that
> kernel it displays some commands and then it displays kernel panic and
> reboots the machine.
>
> Is it because I dont have an initrd entry for it? There is no initrd
> file corresponding to XEN in the boot directory.
>
> thanks & regards.
>   
You do have a /boot partition of its own, as partition 0 on hard drive 0 
(which you can look up in /boot/grub/device.map), right? And why not 
boot with your installation CD in "rescue" mode in order to get at and
play with the grub configuration as needed?

Also, I would *not* put a "/" in a title.

And last, how did you install your Xen kernel? See, the SRPM does all 
that for you, but did you do a "make install" with it? That should
have
given you an initrd.

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