Xen users - Jan 2011 - xen-unstable: ImportError: No module named xen.xm

I have pulled the latest from xen-unstable on a new machine, I run
make world and make install and after rebooting into xen, when i run
xm list or anything else i get:

# xm list
Traceback (most recent call last):
  File "/usr/sbin/xm", line 5, in <module>
    from xen.xm import main
ImportError: No module named xen.xm

I also tried going into the tools dir and make install, because i read
that somewhere on google.

I don''t get any errors when compiling or installing so I don''t
know
where to go from here?

- chris

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On Wed, Jan 19, 2011 at 2:29 PM, chris <tknchris@gmail.com>
wrote:
> I have pulled the latest from xen-unstable on a new machine, I run
> make world and make install and after rebooting into xen, when i run
> xm list or anything else i get:
>
> # xm list
> Traceback (most recent call last):
>  File "/usr/sbin/xm", line 5, in <module>
>    from xen.xm import main
> ImportError: No module named xen.xm
>
> I also tried going into the tools dir and make install, because i read
> that somewhere on google.
>
> I don''t get any errors when compiling or installing so I
don''t know
> where to go from here?
>
> - chris
>
I just tried this again after pulling everything down again and
recompiling. Is something broken?

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On Wed, 2011-01-19 at 22:34 +0000, chris wrote:
> On Wed, Jan 19, 2011 at 2:29 PM, chris <tknchris@gmail.com> wrote:
> > I have pulled the latest from xen-unstable on a new machine, I run
> > make world and make install and after rebooting into xen, when i run
> > xm list or anything else i get:
> >
> > # xm list
> > Traceback (most recent call last):
> >  File "/usr/sbin/xm", line 5, in <module>
> >    from xen.xm import main
> > ImportError: No module named xen.xm
> >
> > I also tried going into the tools dir and make install, because i read
> > that somewhere on google.
> >
> > I don''t get any errors when compiling or installing so I
don''t know
> > where to go from here?
> >
> > - chris
> >
> 
> I just tried this again after pulling everything down again and
> recompiling. Is something broken?
Nothing currently known.

Which host OS are you running?

Do:
$ python
>>> import sys
>>> print sys.path
This should tell you the python path which is where python is looking
for stuff. The install process should have dropped xen/xm/main.py
somewhere on the system, the build log or "find" should tell you
where.
Do they correspond?

Ian.


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On Thu, Jan 20, 2011 at 3:38 AM, Ian Campbell <Ian.Campbell@citrix.com>
wrote:
> On Wed, 2011-01-19 at 22:34 +0000, chris wrote:
>> On Wed, Jan 19, 2011 at 2:29 PM, chris <tknchris@gmail.com>
wrote:
>> > I have pulled the latest from xen-unstable on a new machine, I run
>> > make world and make install and after rebooting into xen, when i
run
>> > xm list or anything else i get:
>> >
>> > # xm list
>> > Traceback (most recent call last):
>> >  File "/usr/sbin/xm", line 5, in <module>
>> >    from xen.xm import main
>> > ImportError: No module named xen.xm
>> >
>> > I also tried going into the tools dir and make install, because i
read
>> > that somewhere on google.
>> >
>> > I don''t get any errors when compiling or installing so I
don''t know
>> > where to go from here?
>> >
>> > - chris
>> >
>>
>> I just tried this again after pulling everything down again and
>> recompiling. Is something broken?
>
> Nothing currently known.
>
> Which host OS are you running?
>
> Do:
> $ python
>>>> import sys
>>>> print sys.path
>
> This should tell you the python path which is where python is looking
> for stuff. The install process should have dropped xen/xm/main.py
> somewhere on the system, the build log or "find" should tell you
where.
> Do they correspond?
>
> Ian.
>
>
This is debian squeeze. I''m guessing something just changed in the
python package?

# python
Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or
"license" for more information.
>>> import sys
>>> print sys.path
['''', ''/usr/lib/python2.6'',
''/usr/lib/python2.6/plat-linux2'',
''/usr/lib/python2.6/lib-tk'',
''/usr/lib/python2.6/lib-old'',
''/usr/lib/python2.6/lib-dynload'',
''/usr/local/lib/python2.6/dist-packages'',
''/usr/lib/python2.6/dist-packages'',
''/usr/lib/pymodules/python2.6'']


Any idea where to go from here? I don''t know a whole lot about python

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On Thu, 2011-01-20 at 16:49 +0000, chris wrote:
> On Thu, Jan 20, 2011 at 3:38 AM, Ian Campbell
<Ian.Campbell@citrix.com> wrote:
> > On Wed, 2011-01-19 at 22:34 +0000, chris wrote:
> >> On Wed, Jan 19, 2011 at 2:29 PM, chris <tknchris@gmail.com>
wrote:
> >> > I have pulled the latest from xen-unstable on a new machine,
I run
> >> > make world and make install and after rebooting into xen,
when i run
> >> > xm list or anything else i get:
> >> >
> >> > # xm list
> >> > Traceback (most recent call last):
> >> >  File "/usr/sbin/xm", line 5, in <module>
> >> >    from xen.xm import main
> >> > ImportError: No module named xen.xm
> >> >
> >> > I also tried going into the tools dir and make install,
because i read
> >> > that somewhere on google.
> >> >
> >> > I don''t get any errors when compiling or installing
so I don''t know
> >> > where to go from here?
> >> >
> >> > - chris
> >> >
> >>
> >> I just tried this again after pulling everything down again and
> >> recompiling. Is something broken?
> >
> > Nothing currently known.
> >
> > Which host OS are you running?
> >
> > Do:
> > $ python
> >>>> import sys
> >>>> print sys.path
> >
> > This should tell you the python path which is where python is looking
> > for stuff. The install process should have dropped xen/xm/main.py
> > somewhere on the system, the build log or "find" should tell
you where.
> > Do they correspond?
> >
> > Ian.
> >
> >
> 
> This is debian squeeze. I''m guessing something just changed in the
> python package?
> 
> # python
> Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48)
> [GCC 4.4.5] on linux2
> Type "help", "copyright", "credits" or
"license" for more information.
> >>> import sys
> >>> print sys.path
> ['''', ''/usr/lib/python2.6'',
''/usr/lib/python2.6/plat-linux2'',
> ''/usr/lib/python2.6/lib-tk'',
''/usr/lib/python2.6/lib-old'',
> ''/usr/lib/python2.6/lib-dynload'',
> ''/usr/local/lib/python2.6/dist-packages'',
> ''/usr/lib/python2.6/dist-packages'',
''/usr/lib/pymodules/python2.6'']
> 
> 
> Any idea where to go from here? I don''t know a whole lot about
python
As I said before -- use "find" or the build log to figure out where
Xen
installed itself to, then we can try and figure out where it went wrong.

Ian.


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On Thu, Jan 20, 2011 at 11:54 AM, Ian Campbell
<Ian.Campbell@eu.citrix.com> wrote:
> On Thu, 2011-01-20 at 16:49 +0000, chris wrote:
>> On Thu, Jan 20, 2011 at 3:38 AM, Ian Campbell
<Ian.Campbell@citrix.com> wrote:
>> > On Wed, 2011-01-19 at 22:34 +0000, chris wrote:
>> >> On Wed, Jan 19, 2011 at 2:29 PM, chris
<tknchris@gmail.com> wrote:
>> >> > I have pulled the latest from xen-unstable on a new
machine, I run
>> >> > make world and make install and after rebooting into xen,
when i run
>> >> > xm list or anything else i get:
>> >> >
>> >> > # xm list
>> >> > Traceback (most recent call last):
>> >> >  File "/usr/sbin/xm", line 5, in <module>
>> >> >    from xen.xm import main
>> >> > ImportError: No module named xen.xm
>> >> >
>> >> > I also tried going into the tools dir and make install,
because i read
>> >> > that somewhere on google.
>> >> >
>> >> > I don''t get any errors when compiling or
installing so I don''t know
>> >> > where to go from here?
>> >> >
>> >> > - chris
>> >> >
>> >>
>> >> I just tried this again after pulling everything down again
and
>> >> recompiling. Is something broken?
>> >
>> > Nothing currently known.
>> >
>> > Which host OS are you running?
>> >
>> > Do:
>> > $ python
>> >>>> import sys
>> >>>> print sys.path
>> >
>> > This should tell you the python path which is where python is
looking
>> > for stuff. The install process should have dropped xen/xm/main.py
>> > somewhere on the system, the build log or "find" should
tell you where.
>> > Do they correspond?
>> >
>> > Ian.
>> >
>> >
>>
>> This is debian squeeze. I''m guessing something just changed in
the
>> python package?
>>
>> # python
>> Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48)
>> [GCC 4.4.5] on linux2
>> Type "help", "copyright", "credits" or
"license" for more information.
>> >>> import sys
>> >>> print sys.path
>> ['''', ''/usr/lib/python2.6'',
''/usr/lib/python2.6/plat-linux2'',
>> ''/usr/lib/python2.6/lib-tk'',
''/usr/lib/python2.6/lib-old'',
>> ''/usr/lib/python2.6/lib-dynload'',
>> ''/usr/local/lib/python2.6/dist-packages'',
>> ''/usr/lib/python2.6/dist-packages'',
''/usr/lib/pymodules/python2.6'']
>>
>>
>> Any idea where to go from here? I don''t know a whole lot about
python
>
> As I said before -- use "find" or the build log to figure out
where Xen
> installed itself to, then we can try and figure out where it went wrong.
>
> Ian.
>
>
/usr/lib/python2.6/site-packages/xen/xm/main.py

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> >> ['''', ''/usr/lib/python2.6'',
''/usr/lib/python2.6/plat-linux2'',
> >> ''/usr/lib/python2.6/lib-tk'',
''/usr/lib/python2.6/lib-old'',
> >> ''/usr/lib/python2.6/lib-dynload'',
> >> ''/usr/local/lib/python2.6/dist-packages'',
> >> ''/usr/lib/python2.6/dist-packages'',
''/usr/lib/pymodules/python2.6'']
vs.
> /usr/lib/python2.6/site-packages/xen/xm/main.py
So the Xen python bits are not installed to a path which the python
interpreter is searching.

Xen relies on the python distutils library to build and install its
python bits and makes no specific reference to site-packages in its
makefiles (that I can find).

The Debian python policy
(http://www.debian.org/doc/packaging-manuals/python-policy/ch-python.html)
suggests that this change of location is deliberate from python 2.6 onwards.
However /usr/lib/python2.6/distutils/command/install.py still makes reference to
site-packages which is no doubt where it is coming from.

At this point my Debian python-fu is running low but I think you have
found a bug in Debian and should report it to them as such.

I also suspect that the fact that distutils is installing
non-packaged/locally-built python bits in /usr/lib/python2.6 rather
than /usr/local/lib/python2.6 is also a bug in the python system.

Ian.


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chris writes ("Re: [Xen-devel] Re: xen-unstable: ImportError: No module
named xen.xm"):
> On Thu, Jan 20, 2011 at 3:38 AM, Ian Campbell
<Ian.Campbell@citrix.com> wrote:
> This is debian squeeze. I''m guessing something just changed in the
> python package?
Unfortunately the combination of Python and the Debian Python
packaging is a complete disaster.

We have had some suggested patches that involve passing a strange
option to all instances of setup.py.  What I''ll do is prepare a
version of that patch which might be suitable for applying to
xen-unstable, and post it here.

Would you then be able to test it ?

Thanks,
Ian.

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I would be very willing to. Thanks

On Jan 20, 2011 1:19 PM, "Ian Jackson"
<Ian.Jackson@eu.citrix.com> wrote:

chris writes ("Re: [Xen-devel] Re: xen-unstable: ImportError: No module
named xen.xm"):
> On Thu, Jan 20, 2011 at 3:38 AM, Ian Campbell
<Ian.Campbell@citrix.com>
wrote:
> This is debian squeeze. I''m guessing something just changed in the
> python package?
Unfortunately the combination of Python and the Debian Python
packaging is a complete disaster.

We have had some suggested patches that involve passing a strange
option to all instances of setup.py.  What I''ll do is prepare a
version of that patch which might be suitable for applying to
xen-unstable, and post it here.

Would you then be able to test it ?

Thanks,
Ian.


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> On Thu, 20 Jan 2011 17:38:23 +0000 <Ian.Campbell@eu.citrix.com>
wrote:
> 
> > >> ['''',
''/usr/lib/python2.6'',
''/usr/lib/python2.6/plat-linux2'',
> > >> ''/usr/lib/python2.6/lib-tk'',
''/usr/lib/python2.6/lib-old'',
> > >> ''/usr/lib/python2.6/lib-dynload'',
> > >> ''/usr/local/lib/python2.6/dist-packages'',
> > >> ''/usr/lib/python2.6/dist-packages'',
''/usr/lib/pymodules/python2.6'']
> 
> vs.
> 
> > /usr/lib/python2.6/site-packages/xen/xm/main.py
Have you tried modifying the Config.mk is the root directory of your Xen.4.1
sources before compiling?

hg diff Config.mk output:

--- a/Config.mk    Tue Jan 18 17:23:24 2011 +0000
+++ b/Config.mk    Fri Jan 21 13:03:32 2011 +0000
@@ -1,7 +1,8 @@
 # -*- mode: Makefile; -*-
 
 # A debug build of Xen and tools?
-debug ?= y
+#debug ?= y
+debug ?= n
 
 XEN_COMPILE_ARCH    ?= $(shell uname -m | sed -e s/i.86/x86_32/ \
                          -e s/i86pc/x86_32/ -e s/amd64/x86_64/)
@@ -56,7 +57,8 @@
 FLEX    ?= flex
 
 PYTHON      ?= python
-PYTHON_PREFIX_ARG ?= --prefix="$(PREFIX)"
+PYTHON_PREFIX_ARG  ?= 
+#PYTHON_PREFIX_ARG ?= --prefix="$(PREFIX)"
 # The above requires that PREFIX contains *no spaces*. This variable is here
 # to permit the user to set PYTHON_PREFIX_ARG to '''' to
workaround this bug:
 #  https://bugs.launchpad.net/ubuntu/+bug/362570



My resulting python path with when changing PYTHON_PREFIX_ARG was apparently
/usr/local/lib/python2.6/dist-packages which I noticed was in your
python''s interpreter search path(s).

ls -l /usr/local/lib/python2.6/dist-packages
total 48
-rwxr-xr-x  1 topgun topgun 30693 Jan 18 20:27 fsimage.so
drwxr-xr-x  2 topgun topgun  4096 Jan 18 20:57 grub
-rw-r--r--  1 topgun topgun   226 Jan 18 20:31 pygrub-0.3.egg-info
drwxr-xr-x 10 topgun topgun  4096 Jan 18 20:57 xen
-rw-r--r--  1 topgun topgun   171 Jan 18 20:31 xen-3.0.egg-info


This is only a hack, as I am not sure if I bug has already been reported on the
Debian BTS to fix the issue with python 2.6 onwards.

 /usr/lib/python2.6/distutils/command/install.py still makes reference
to site-packages <-- causing the issue (personally unconfirmed, source Xen
developer: Ian Campbell who definatly knows more than I do when it comes to Xen
or python).
> 
> So the Xen python bits are not installed to a path which the python
> interpreter is searching.
> 
> Xen relies on the python distutils library to build and install its
> python bits and makes no specific reference to site-packages in its
> makefiles (that I can find).
> 
> The Debian python policy
> (http://www.debian.org/doc/packaging-manuals/python-policy/ch-python.html)
suggests that this change of location is deliberate from python 2.6 onwards.
However /usr/lib/python2.6/distutils/command/install.py still makes reference to
site-packages which is no doubt where it is coming from.
> 
> At this point my Debian python-fu is running low but I think you have
> found a bug in Debian and should report it to them as such.
> 
> I also suspect that the fact that distutils is installing
> non-packaged/locally-built python bits in /usr/lib/python2.6 rather
> than /usr/local/lib/python2.6 is also a bug in the python system.
As pointed out above my /usr/local/lib/python2.6/dist-packages does contain xen
realated files, but just incase some locally built python stuff realted to xen
did end up /usr/lib/python2.6/ I have attached that larger directory listing as
well... a simple search for xen returns nothing.


 		 	   		  


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chris writes ("Re: [Xen-devel] Re: xen-unstable: ImportError: No module
named xen.xm"):
> I would be very willing to. Thanks
Having looked into this in more detail it would seem likely that you
are running into this bug:
  https://bugs.launchpad.net/ubuntu/+bug/362570

Can you please try running the build again but setting
   PYTHON_PREFIX_ARG=''''
on the make command line or in the environment ?

Thanks,
Ian.

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Mike Viau writes ("RE: [Xen-users] Re: [Xen-devel] Re: xen-unstable:
ImportError: No module named xen.xm"):
> -PYTHON_PREFIX_ARG ?= --prefix="$(PREFIX)"
> +PYTHON_PREFIX_ARG  ?= 
> +#PYTHON_PREFIX_ARG ?= --prefix="$(PREFIX)"
>  # The above requires that PREFIX contains *no spaces*. This variable is
here
>  # to permit the user to set PYTHON_PREFIX_ARG to '''' to
workaround this bug:
>  #  https://bugs.launchpad.net/ubuntu/+bug/362570
...
> My resulting python path with when changing PYTHON_PREFIX_ARG was
> apparently /usr/local/lib/python2.6/dist-packages which I noticed
> was in your python''s interpreter search path(s).
Thanks for investigating this.
> This is only a hack, as I am not sure if I bug has already been
> reported on the Debian BTS to fix the issue with python 2.6 onwards.
Launchpad has a facility to refer to Debian bugs, so if anyone has
submitted it to Debian they''re probably not a Launchpad user.

I had a look in the Debian BTS myself and found no trace of it.  We
should certainly file a bug there, but this is probably best done when
we have figured out whether or not it''s the same as the Ubuntu bug
mentioned in Config.mk.

Thanks,
Ian.

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Mike Viau writes ("RE: [Xen-users] Re: [Xen-devel] Re: xen-unstable:
ImportError: No module named xen.xm"):
> My resulting python path with when changing PYTHON_PREFIX_ARG was
apparently /usr/local/lib/python2.6/dist-packages which I noticed was in your
python''s interpreter search path(s).
Can you tell me the version of python that you were using when you did
this test ?  I need the Debian package name and the Debian package
version, for the bug report.

Thanks,
Ian.

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> On Wed, 26 Jan 2011 14:51:19 +0000 <Ian.Jackson@eu.citrix.com> wrote:
> 
> > Mike Viau writes ("RE: [Xen-users] Re: [Xen-devel] Re:
xen-unstable: ImportError: No module named xen.xm"):
> > My resulting python path with when changing PYTHON_PREFIX_ARG was
apparently /usr/local/lib/python2.6/dist-packages which I noticed was in your
python''s interpreter search path(s).
> 
> Can you tell me the version of python that you were using when you did
> this test ?  I need the Debian package name and the Debian package
> version, for the bug report.
> 

Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48)


apt-cache policy python
python:
  Installed: 2.6.6-3+squeeze5
  Candidate: 2.6.6-3+squeeze5
  Version table:
 *** 2.6.6-3+squeeze5 0
        500 http://mirror.csclub.uwaterloo.ca/debian/ squeeze/main amd64
Packages
        100 /var/lib/dpkg/status



 		 	   		  

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