Sorry, never mind, as I found out in this
/usr/lib/python/xen/util/blkif.py file, it is about the block devices.
I checked the whole thing and it couldn't find the valid block device,
this was due to a false location in my config file, that's where the
strange complain came from, as it turned out.
Not a very friendly err message, if a valid block device can't be
located. ;-)
I can proceed again :)
Greetz Blurg
Although very unlikely, it seems Jurgen Stroo stated on Jun 17 that :
> Hi, I get this strange error about string and nonetype concatenating, but
> I think I am not sure why it is complaining at having a Nonetype
> somewhere, as if I did not define some configuration option? I use the
> following command (below that, there is a dry-run
> result):
>
> FYI: I removed the loopback.o from the drivers/xen/netback/Makefile and
> recompiled the whole thing. This was because Xen unstable did not work,
> some strange behaviour with arp. Now it does work, the veth0 interface and
> the network.
>
> megalosaurus:/etc/xen# xm create -c xm-machine01 vmid=1
> Using config file "xm-machine01".
> VIRTUAL MEMORY ARRANGEMENT:
> Loaded kernel: 0xc0100000->0xc0353f04
> Init. ramdisk: 0xc0354000->0xc0354000
> Phys-Mach map: 0xc0354000->0xc0374000
> Page tables: 0xc0374000->0xc0376000
> Start info: 0xc0376000->0xc0377000
> Boot stack: 0xc0377000->0xc0378000
> TOTAL: 0xc0000000->0xc0400000
> ENTRY ADDRESS: 0xc0100000
> VCPUS: 4
> Domain construction error: cannot concatenate 'str' and 'NoneType' objects
> Traceback (most recent call last):
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 483, in
> construct
> self.configure()
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 992, in
> configure
> self.create_devices()
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 768, in
> create_devices
> self.create_configured_devices()
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 757, in
> create_configured_devices
> self.createDevice(ctrl_type, dev_config, recreate=recreate)
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 332, in
> createDevice
> return ctrl.createDevice(devconfig, recreate=self.recreate)
> File "/usr/lib/python/xen/xend/server/controller.py", line 236, in
> createDevice
> dev.attach(recreate=recreate, change=change)
> File "/usr/lib/python/xen/xend/server/blkif.py", line 221, in attach
> self.setNode(node)
> File "/usr/lib/python/xen/xend/server/blkif.py", line 247, in setNode
> mounted_mode = self.check_mounted(node)
> File "/usr/lib/python/xen/xend/server/blkif.py", line 265, in
> check_mounted
> mode = blkif.mount_mode(name)
> File "/usr/lib/python/xen/util/blkif.py", line 73, in mount_mode
> exp = re.compile('^' + name + ' .*[\(,]r(?P<mode>[ow])[,\)]')
> TypeError: cannot concatenate 'str' and 'NoneType' objects
> op_create> Exception creating domain:
> Traceback (most recent call last):
> File "/usr/lib/python/xen/xend/server/SrvDomainDir.py", line 63, in
> op_create
> dominfo = self.xd.domain_create(config)
> File "/usr/lib/python/xen/xend/XendDomain.py", line 282, in
> domain_create
> dominfo = XendDomainInfo.vm_create(config)
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 153, in
> vm_create
> vm.construct(config)
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 483, in
> construct
> self.configure()
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 992, in
> configure
> self.create_devices()
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 768, in
> create_devices
> self.create_configured_devices()
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 757, in
> create_configured_devices
> self.createDevice(ctrl_type, dev_config, recreate=recreate)
> File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 332, in
> createDevice
> return ctrl.createDevice(devconfig, recreate=self.recreate)
> File "/usr/lib/python/xen/xend/server/controller.py", line 236, in
> createDevice
> dev.attach(recreate=recreate, change=change)
> File "/usr/lib/python/xen/xend/server/blkif.py", line 221, in attach
> self.setNode(node)
> File "/usr/lib/python/xen/xend/server/blkif.py", line 247, in setNode
> mounted_mode = self.check_mounted(node)
> File "/usr/lib/python/xen/xend/server/blkif.py", line 265, in
> check_mounted
> mode = blkif.mount_mode(name)
> File "/usr/lib/python/xen/util/blkif.py", line 73, in mount_mode
> exp = re.compile('^' + name + ' .*[\(,]r(?P<mode>[ow])[,\)]')
> TypeError: cannot concatenate 'str' and 'NoneType' objects
> Error: Error creating domain: cannot concatenate 'str' and 'NoneType'
> objects
>
>
>
> megalosaurus:/etc/xen# xm create -cn xm-machine01 vmid=1
> Using config file "xm-machine01".
> (vm
> (name machine01)
> (memory 128)
> (cpu 1)
> (image
> (linux
> (kernel /boot/vmlinuz-2.6.11-xenU)
> (root '/dev/hda1 ro')
> (vcpus 4)
> )
> )
> (device
> (vbd
> (uname file:/mnt/xenu/machine01/root_fs_machine01)
> (dev hda1)
> (mode w)
> )
> )
> (device
> (vbd
> (uname file:/mnt/xenu/machine01/swap_fs_machine01)
> (dev hda2)
> (mode w)
> )
> )
> (device (vif (mac aa:00:00:6a:60:02)))
> (memmap )
> (device_model )
> (device_config )
>
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> http://lists.xensource.com/xen-devel
>
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