Jeroen Beerstra
2007-Jan-04 03:13 UTC
[Fedora-xen] problems with rhel4(clone) as DomainU on FC6 Xen host
hi there,
I am currently playing around with the Xen support in FC6. Installation of Xen
and FC6 Domain0, setting up a FC6 guest with virt-manager all went well,
however I did not succeed in running a second RHEL4(clone) guest I prepped
with Qemu.
It took quite some time to figure things out, firstly the host is x86_64 and
the guest is/was a 32 bit X/OS (Dutch RHEL clone) desktop , but if I
understand things correctly there shouldn''t be any problems when
running a 64
bit kernel with 32 bit userland. Then I had to learn that a initrd for
domain0 is not the same as one for a domainU :) After that the guest booted
with the FC6 Xen kernel when I disabled SELinux , however udev fails to
start which makes the bootup stop on filesystem check time because I used the
default LVM setup and the LVM devices are not created, so the rootfs cannot
be found. The repair shell however showed the rootfs is mounted
on /dev/mapper/VolGroup00-LogVol00 ro and a remount rw does work even
though /dev/mapper/VolGroup00-LogVol00 does not seem to exist :?
So I decided I needed a Xen enabled RHEL4 x86_64 kernel and got it from
http://people.redhat.com/~jbaron/rhel4/RPMS.kernel/.
I could also convert the image to a non LVM one (the Centos4.4 guest from
jailtime.org does bootup properly even though it has the same udev problem,
because of this), but I rather have a fully functional X/OS.
Ofcourse there were problems. I could not install the x86_64 kernel inside the
X/OS guest booted with Qemu so I tried manually putting things in place.
Running ''/sbin/new-kernel-pkg --package
kernel-xenU --mkinitrd --depmod --install 2.6.9-42.36.ELxenU'' produced
some
errors related to strip and 64bit kernel modules, but the initrd got created.
I''m sure I can work around this if needed, however Xen crashes on the
RHEL4
Xen kernel right away:
# xm create -c VirtualXOS4_test
Using config file "VirtualXOS4_test".
Started domain VirtualXOS4
xen_start_info @ffffffff8068a000
shared @m0000fc7000 @ffffffff80107000=@ffffffffff5fd000 [0x802]
xen_start_info: @ffffffff8068a000
cr3 0000000000101000 pml4p ffffffff80101ff8
pml4e 0000000000103067 (real 0000000028292067) pgdp ffffff8000103ff0
pgde 0000000000105067 (real 00000000064cc067) pmdp ffffff8000105018
pmde 0000000000693067 (real 0000000066165067) ptep ffffff8000693450
pte 001000000068a027 (real 0010000006c13027)
xen_shared_info: @ffffffffff5fd000
cr3 0000000000101000 pml4p ffffffff80101ff8
pml4e 0000000000103067 (real 0000000028292067) pgdp ffffff8000103ff8
pgde 0000000000000000 is none
PAGE_OFFSET+1.2: @ffffff8000001000
cr3 0000000000101000 pml4p ffffffff80101ff8
pml4e 0000000000103067 (real 0000000028292067) pgdp ffffff8000103000
pgde 0000000000694067 (real 00000000567a2067) pmdp ffffff8000694000
pmde 0000000000695067 (real 0000000067e6c067) ptep ffffff8000695008
pte 0000000000001167 (real 0000000008709167)
Is the RHEL4 Xen kernel incompatible with FC6 Xen? If so does anybody know if
an updated version exists and were to get it?
And then there is pygrub, with the FC6 guest created by virt-manager this
works like a charm, however with the X/OS guest it just won''t work:
# xm create -c VirtualXOS4
Using config file "VirtualXOS4".
Going to boot X/OS Linux (2.6.9-42.36.ELxenU)
kernel: /vmlinuz-2.6.9-42.36.ELxenU
initrd: /initrd-2.6.9-42.36.ELxenU.img
Error: invalid literal for int(): gh
I even tried copying over the grub installation from the FC6 x86_64 guest, but
the problem remains. Anybody has any idea why pygrub is failing:
Traceback (most recent call last):
File
"/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py", line
194, in create
vm.construct()
File
"/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py", line
1257, in construct
handle = uuid.fromString(self.info[''uuid'']))
File "/usr/lib64/python2.4/site-packages/xen/xend/uuid.py", line 67,
in
fromString
return [ int(s[i : i + 2], 16) for i in range(0, 32, 2) ]
ValueError: invalid literal for int(): gh
[2007-01-04 03:47:06 xend.XendDomainInfo 3323] DEBUG (XendDomainInfo:1449)
XendDomainInfo.destroy: domid=None
[2007-01-04 03:47:06 xend 3323] ERROR (xmlrpclib2:184) invalid literal for
int(): gh
Traceback (most recent call last):
File "/usr/lib64/python2.4/site-packages/xen/util/xmlrpclib2.py",
line 162,
in _marshaled_dispatch
response = self._dispatch(method, params)
File "/usr/lib64/python2.4/SimpleXMLRPCServer.py", line 406, in
_dispatch
return func(*params)
File
"/usr/lib64/python2.4/site-packages/xen/xend/server/XMLRPCServer.py",
line 64, in domain_create
info = XendDomain.instance().domain_create(config)
File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomain.py",
line 228,
in domain_create
dominfo = XendDomainInfo.create(config)
File
"/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py", line
194, in create
vm.construct()
File
"/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py", line
1257, in construct
handle = uuid.fromString(self.info[''uuid'']))
File "/usr/lib64/python2.4/site-packages/xen/xend/uuid.py", line 67,
in
fromString
return [ int(s[i : i + 2], 16) for i in range(0, 32, 2) ]
ValueError: invalid literal for int(): gh
--
regards,
Jeroen Beerstra
Jeroen Beerstra
2007-Jan-07 00:57 UTC
Re: [Fedora-xen] problems with rhel4(clone) as DomainU on FC6 Xen host
hi again, Op donderdag 4 januari 2007 04:13, schreef Jeroen Beerstra:> hi there, ><big cut!> Just to make sure nobody is wasting time on this ... so far you haven''t but one never knows ;) or just to help out somebody with similar problems. I have given up and grabbed myself an X/OS 4 x86_64 iso and guess what it just worked (tm)! Actually that is a bit oversimplified, since RHEL4 (and clones) is not XEN enabled by default so it did required some manual labour, but basicly this time following the guidelines from http://people.redhat.com/riel/RHEL4-Xen-HOWTO produced a working xen guest. The problem was with the initrd: - an initrd created on i386 RHEL4 for the x86_64 RHEL4 kernel doesn''t has any modules in it, hence (?) it doesn''t boot at all. - an initrd created on a FC6 guest is incompatible with RHEL4 (nash consumes 100% CPU and the correct devices for lvm are not created so the system doesn''t boot) - finally an initrd created on the RHEL4 x86_64 guest (booted with qemu) for the x86_64 RHEL4 kernel did work. So you need a working x86_64 RHEL4 (clone) setup to be able to build a working initrd for the RHEL4 x86_64 xen kernels. This then does boot i386 RHEL4, but why bother :D However pygrub still doesn''t work, same problem as before :( I was kindoff hoping there was some problem with x86_64 versus i386, but apparently that isn''t it either ... anybody any ideas why pygrub is baling out with ''Error: invalid literal for int(): gh''?? http://people.redhat.com/riel/RHEL4-Xen-HOWTO suggests pygrub should work with RHEL4 guests.> > And then there is pygrub, with the FC6 guest created by virt-manager this > works like a charm, however with the X/OS guest it just won''t work: > > # xm create -c VirtualXOS4 > Using config file "VirtualXOS4". > Going to boot X/OS Linux (2.6.9-42.36.ELxenU) > kernel: /vmlinuz-2.6.9-42.36.ELxenU > initrd: /initrd-2.6.9-42.36.ELxenU.img > Error: invalid literal for int(): gh > > I even tried copying over the grub installation from the FC6 x86_64 guest, > but the problem remains. Anybody has any idea why pygrub is failing: > > Traceback (most recent call last): > File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py", > line 194, in create > vm.construct() > File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py", > line 1257, in construct > handle = uuid.fromString(self.info[''uuid''])) > File "/usr/lib64/python2.4/site-packages/xen/xend/uuid.py", line 67, in > fromString > return [ int(s[i : i + 2], 16) for i in range(0, 32, 2) ] > ValueError: invalid literal for int(): gh > [2007-01-04 03:47:06 xend.XendDomainInfo 3323] DEBUG (XendDomainInfo:1449) > XendDomainInfo.destroy: domid=None > [2007-01-04 03:47:06 xend 3323] ERROR (xmlrpclib2:184) invalid literal for > int(): gh > Traceback (most recent call last): > File "/usr/lib64/python2.4/site-packages/xen/util/xmlrpclib2.py", line > 162, in _marshaled_dispatch > response = self._dispatch(method, params) > File "/usr/lib64/python2.4/SimpleXMLRPCServer.py", line 406, in _dispatch > return func(*params) > File > "/usr/lib64/python2.4/site-packages/xen/xend/server/XMLRPCServer.py", line > 64, in domain_create > info = XendDomain.instance().domain_create(config) > File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomain.py", line > 228, in domain_create > dominfo = XendDomainInfo.create(config) > File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py", > line 194, in create > vm.construct() > File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py", > line 1257, in construct > handle = uuid.fromString(self.info[''uuid''])) > File "/usr/lib64/python2.4/site-packages/xen/xend/uuid.py", line 67, in > fromString > return [ int(s[i : i + 2], 16) for i in range(0, 32, 2) ] > ValueError: invalid literal for int(): gh-- Jeroen Beerstra